WO2025041208A1 - Terminal, wireless communication method, and base station - Google Patents

Abstract

A terminal according to one aspect disclosed herein is characterized by including: a reception unit that receives a configuration of a Doppler CSI report based on a configuration of a periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS); and a control unit that, after a specific event, drops the transmission of the report if neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement is present before a CSI reference resource. According to one aspect disclosed herein, reporting of Doppler CSI can be appropriately performed.

Description

Terminal, wireless communication method and base station

This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.

Long Term Evolution (LTE) was specified for Universal Mobile Telecommunications System (UMTS) networks with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of achieving higher capacity and greater sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also under consideration.

3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Univers al　Terrestrial　Radio　Access　Network　(E-UTRAN);　Overall　description;　Stage 2　(Release　8)”, April 2010

In future wireless communication systems (e.g., NR), it is being considered that terminals (user terminals, User Equipment (UE)) will report Doppler CSI.

However, sufficient consideration has not been given to Doppler CSI reporting. For example, the conditions for reporting Doppler CSI (such as timing conditions) have not been fully considered. In this case, Doppler CSI may not be reported appropriately, which could result in reduced communication throughput.

Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately report Doppler CSI.

A terminal according to one embodiment of the present disclosure is characterized by having a receiving unit that receives a Doppler CSI report configuration based on a periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration, and a control unit that drops the transmission of the report if, after a specific event, neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists by the CSI reference resource.

According to one aspect of the present disclosure, Doppler CSI can be appropriately reported.

1A and 1B are diagrams illustrating an example of a procedure for reporting Doppler CSI in the first embodiment. 2A and 2B are diagrams showing an example of a procedure for reporting Doppler CSI in the second embodiment. FIG. 3 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 4 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 5 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 6 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 7 is a diagram illustrating an example of a vehicle according to an embodiment.

Channel State Information (CSI) Measurement/Reporting
CSI measurement/reporting in existing NR standards (e.g., Rel. 15-17 NR) will be described. The UE generates (also called determining, calculating, estimating, measuring, etc.) CSI based on a reference signal (RS) (or a resource for the RS) and transmits (also called reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station using, for example, an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

In this disclosure, CSI includes a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS/PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), and a Layer 1 Reference Signal Received Power (L1-RSRP). It may include at least one of the following: L1-Reference Signal Received Power (L1-RSRQ), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), information on the channel matrix (or channel coefficients), information on the precoding matrix (or precoding coefficients), information on the beam/Transmission Configuration Indication state (TCI state)/spatial relation, etc.

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

In this disclosure, RS, CSI-RS, Non Zero Power (NZP) CSI-RS, Zero Power (ZP) CSI-RS, CSI Interference Measurement (CSI-IM), CSI-SSB, and SSB may be interchangeable. In addition, CSI-RS may include other reference signals.

The UE may receive configuration information regarding CSI reporting (which may be referred to as CSI report configuration, report setting, etc.) and control CSI reporting based on the configuration information. The report configuration information may be, for example, a Radio Resource Control (RRC) Information Element (IE) "CSI-ReportConfig."

The CSI reporting configuration may include at least one of the following information:
Information regarding the CSI resources used for CSI measurements (resource configuration ID, for example, "CSI-ResourceConfigId");
Information regarding one or more quantities (CSI parameters) of CSI to be reported (report quantity information, e.g., "reportQuantity");
- Report type information (eg, "reportConfigType") indicating the time domain behavior of the reporting configuration.

In the present disclosure, a CSI resource may be interchangeably referred to as a time instance, a CSI-RS opportunity/CSI-IM opportunity/SSB opportunity, a CSI-RS resource (one/multiple) opportunity, a CSI opportunity, an opportunity, a CSI-RS resource/CSI-IM resource/SSB resource, a time resource, a frequency resource, an antenna port (e.g., a CSI-RS port), etc. The time unit of a CSI resource may be a slot, a symbol, etc.

The information on the CSI resources may include information on CSI resources for channel measurement, information on CSI resources for interference measurement (NZP-CSI-RS resources), information on CSI-IM resources for interference measurement, etc.

The reporting amount information may specify any one of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.) or a combination of these.

The report type information may indicate a periodic CSI (Periodic CSI (P-CSI)) report, an aperiodic CSI (Aperiodic CSI (AP-CSI)) report, or a semi-persistent CSI (Semi-Persistent CSI (SP-CSI)) report.

The UE performs CSI-RS/SSB/CSI-IM measurements based on the CSI resource configuration corresponding to the CSI reporting configuration (the CSI resource configuration associated with CSI-ResourceConfigId) and derives the CSI to be reported based on the measurement results.

The CSI resource configuration (e.g., the CSI-ResourceConfig information element) may include a csi-RS-ResourceSetList field indicating more specific CSI-RS/SSB resources, resource type information (e.g., "resourceType") indicating the time domain behavior of the resource configuration, etc.

The resource type information may indicate a P-CSI resource, an A-CSI resource, or an SP-CSI resource.

(Doppler CSI/Type 2 Codebook)
It is being considered to extend/improve CSI reporting for UEs moving at high/medium speeds by utilizing time-domain correlation/Doppler-domain (DD) information, such as improving the extended (Rel. 16) type-2 codebook and the additional extended (Rel. 17) type-2 PS codebook without changing the spatial and frequency domain basis, and reporting time-domain channel characteristics (time-domain correlation profile) measured via tracking CSI-RS (TRS) from the UE.

The channel coherent time (CCT) depends on the maximum Doppler shift. The channel coherent time is the time when the measured channel characteristics are available or when the measured channel characteristics become unavailable (channel aging). The maximum Doppler shift is estimated by the relative speed between the transmitter and the receiver. The channel coherent time _Tc is approximated by 1/Δf _max , where Δf _max =v/λ. As the UE's moving speed increases, the channel coherent time decreases. For example, at a carrier frequency of 4.5 GHz, when the moving speed exceeds about 25 km/h, the channel coherent time falls below 10 ms. How to deal with such high moving speed and short channel coherent time becomes a problem.

To track the Doppler shift, TRS is supported. However, TRS has the following problems:
The number of ports per CSI-RS resource set is limited to only one. Each CSI-RS resource uses a single port.
・The period that can be set is 10 ms or more.
No CSI reporting is expected for TRS. There is no reporting configuration for P-TRS. Reporting can be configured but reportQuantity is set to 'none' only. A maximum of 16 CSI-RS resources are used per CSI-RS resource set.

The TRS are placed in time and frequency domain resources. To measure the impact of Doppler shift, multiple RSs in the time domain are required within a given frequency domain resource.

CMR can be used to measure the effects of Doppler shift. However, the RS used for the measurement depends on the UE implementation.

In the CSI reporting volume, information about Doppler shift is not supported. Through the CSI codebook (PMI), information for the determination of W= _W1W2 is reported by the UE, where _W1 is the wideband characteristic and indicates the spatial beam, _{and W2} is the subband characteristic and indicates the amplitude/phase coefficients for each spatial beam.

Considering measurements related to Doppler shift, there are three possible cases: Case 1, where the UE performs measurements based on CSI-RS, and Case 2, where the base station performs measurements based on SRS. Regarding judgments about the effects of Doppler shift, there are three possible cases: Case 1-1, where the UE performs judgments based on CSI-RS measurement results, Case 1-2, where the base station performs judgments based on CSI-RS measurement results reported by the UE, and Case 2-1, where the base station performs judgments based on SRS measurement results.

CSI-RS measurement windows and CSI reporting windows are considered. Within a CSI-RS measurement window, one or more CSI-RS occasions may be measured. The reported CSI may be associated with a CSI reporting window.

Assuming a CSI report in slot n, the length of the Doppler domain (DD)/time domain (TD) basis vectors (DFT basis vectors) (number of DD/TD basis) may be _N4 . In the CSI measurement window of slot [k, k+W _meas -1], one or more CSI occasions for the calculation of the CSI report may be measured, where k may be a slot index and W _meas may be the measurement window length (number of slots). The CSI occasions may be configured in CSI-ReportConfig. The CSI reporting window of slot [l, l+W _CSI -1] may be associated with the CSI report in slot n, where l may be a slot index and W _CSI may be the reporting window length (number of slots). The location of the CSI reference resource may be denoted as n _ref .

The duration of the CSI reporting window is W _CSI =dN ₄ , where d and N ₄ are determined by the CMR configuration. The start of the CSI reporting window is slot l. l may be (nN _CSI,ref ). l may be (n+δ). δ may be {0,2} or δ may be {0,1,2}.

A d slot may be a duration in DD units.

When UE side prediction is assumed, the UE is supported to predict the CSI/channel after slot l, and the position of slot l (from multiple candidates) is configured by the base station via higher layer signaling. The multiple candidates for the slot l position include legacy CSI reference resource positions (nN _CSI,ref ) and (n+δ), where δ>0. The legacy CSI reference resource in legacy operation, i.e., (nN _CSI,ref ), is reused/repurposed to indicate the position of the last CSI-RS occasion used for CSI reporting.

For parameter δ, an additional value of 2 is supported.

_N4 is configured by the base station via higher layer signaling.

For N ₄ =1, the DD basis may be the identity. There may be no DD compression.

For N ₄ >1, the Doppler domain orthogonal DFT basis may be commonly selected for all SD/FD basis.

Only Q>1 is allowed, indicating the number of selected Doppler Domain (DD) basis vectors. The detailed design of the SD/FD basis including associated UCI parameters follows existing specifications.

For an enhanced Type II codebook for predicted PMI (Rel. 18 type 2 CSI for predicted PMI), the UE may configure the higher layer parameter codebookType set to 'typeII-Doppler-r18'. For a further enhanced Type II port selection codebook for predicted PMI (Rel. 18 type 2 PS CSI for predicted PMI), the UE may configure the higher layer parameter codebookType set to 'typeII-Doppler-PortSelection-r18'.

In the present disclosure, the Doppler codebook, the Doppler type 2 codebook, the extended type 2 codebook for predicted PMI, the Rel. 18 type 2 CSI codebook for predicted PMI, typeII-Doppler-r18, the additional extended type 2 PS codebook for predicted PMI, the Rel. 18 type 2 PS codebook for predicted PMI, and typeII-Doppler-PortSelection-r18 may be read as interchangeable.

(CSI Reference Resources for Rel. 17)
In Rel.17, after CSI reporting configuration/reconfiguration, serving cell activation, BWP change, or SP-CSI activation, the UE shall report CSI reporting only after receiving at least one of the CSI-RS transmission opportunity for channel measurement and the CSI-RS/CSI-IM transmission opportunity for interference measurement at the latest by the reception of the CSI reference resource, otherwise it shall drop the report.

In other words, if at least one of the CSI-RS transmission opportunities for channel measurement and the CSI-IM transmission opportunities for interference measurement does not precede the CSI reference resource, the UE drops the report. Also, if discontinuous reception (DRX) is configured, the report must be within the DRX active time, otherwise the UE drops the report. If a specific RRC parameter (ps-TransmitOtherPeriodicCSI) is configured, the UE reports P-CSI within the drx-onDurationTimer even if the CSI is in a time period when the timer for DRX (drx-onDurationTimer) has not started.

(analysis)
In future wireless communication systems (e.g., NR), it is being considered that UEs will report Doppler CSI.

However, sufficient consideration has not been given to the reporting of Doppler CSI. For example, the conditions for reporting Doppler CSI (such as timing conditions) have not been given sufficient consideration. In this case, Doppler CSI may not be reported appropriately, which may result in reduced communication throughput.

For example, for Doppler CSI, when using P-/SP-CSI-RS, the minimum number of CSI-RS opportunities for the UE to calculate CSI may be different from that for AP-CSI-RS. For AP-CSI-RS, K NZP-CSP-RS resources in the NZP-CSP-RS resource set are assumed. For P-/SP-CSI-RS, the concept of K is not defined yet.

The inventors therefore came up with a method for properly reporting Doppler CSI.

(Various replacements, etc.)
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

In this disclosure, "A/B" and "at least one of A and B" may be interpreted as interchangeable. Also, in this disclosure, "A/B/C" may mean "at least one of A, B, and C."

In this disclosure, terms such as notify, activate, deactivate, indicate, select, configure, update, and determine may be read as interchangeable. In this disclosure, terms such as support, control, capable of control, operate, and capable of operating may be read as interchangeable.

In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In this disclosure, Medium Access Control (MAC Control Element (CE)), update commands, activation/deactivation commands, etc. may be interchangeable.

In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocols (e.g., NR Positioning Protocol A (NRPPa)/LTE Positioning Protocol (LPP)) messages), or a combination of these.

In the present disclosure, the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

In the present disclosure, the physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.

In this disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

In this disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission/Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CONTROLLER RESOLUTION SET (CORESET)), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), Antenna Port (e.g., DeModulation Reference Signal (DMRS)) port), Antenna Port group (e.g., DMRS port group), group (e.g., spatial relationship group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumption, etc. may be read as interchangeable.

In this disclosure, base station, gNB, and network (NW) may be interpreted as interchangeable.

In this disclosure, terms such as drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be interpreted as interchangeable.

In this disclosure, channel measurement, channel measurement result, and channel measurement value may be interchangeable. In this disclosure, interference measurement, interference measurement result, and interference measurement value may be interchangeable.

In the present disclosure, a transmission occasion, a resource, a resource set, a transmission resource, a transmission resource set, and a transmission timing may be interchanged. "A specified number of times (X times/Y times)" and "recent" may be interchanged. In the present disclosure, X times or less and X times may be interchanged. Y times or less and Y times may be interchanged. In the present disclosure, N4 and _N4 may be interchanged.

(Wireless communication method)
First Embodiment
When the UE is configured with Doppler CSI reporting (receives the configuration of Doppler CSI reporting), if after a specific event, there are no CSI-RS transmission opportunities (e.g., X or less CSI-RS transmission opportunities) for channel measurement and no CSI-IM transmission opportunities (e.g., Y or less CSI-IM transmission opportunities) for interference measurement by the CSI reference resource, the UE may drop the report. That is, when the UE is configured with Doppler CSI reporting, if after a specific event, there are at least one of CSI-RS transmission opportunities (e.g., X or less CSI-RS transmission opportunities) for channel measurement and CSI-IM transmission opportunities (e.g., Y or less CSI-IM transmission opportunities) by the CSI reference resource, the UE may transmit the report. Doppler CSI and Doppler CSI reporting may be interchangeable.

The Doppler CSI report in this disclosure may be a (related) CSI report (periodic CSI (P-CSI) report/semi-persistent CSI (SP-CSI) report) based on a periodic CSI-RS (P-CSI-RS) or semi-persistent CSI-RS (SP-CSI-RS) setting.

If the UE is configured for Doppler CSI reporting (receives the configuration for Doppler CSI reporting), the UE may drop the report if, after a certain event, there are no CSI-RS transmission opportunities for channel measurement (e.g., X or fewer CSI-RS transmission opportunities) or no CSI-IM transmission opportunities for interference measurement (e.g., Y or fewer CSI-IM transmission opportunities) by the CSI reference resource.

If the UE is configured for Doppler CSI reporting (receives the configuration for Doppler CSI reporting), the UE may drop the report if, after a certain event, there are no CSI-RS transmission opportunities for channel measurement (e.g., X or fewer CSI-RS transmission opportunities) by the CSI reference resource.

If the UE is configured for Doppler CSI reporting (receives the configuration for Doppler CSI reporting), the UE may drop the report if, after a certain event, there are no CSI-IM transmission opportunities for interference measurement (e.g., Y or fewer CSI-IM transmission opportunities) by the CSI reference resource.

FIGS. 1A and 1B are diagrams showing an example of a procedure for Doppler CSI reporting in the first embodiment. FIG. 1A shows a case in which the above-mentioned Doppler CSI report is transmitted. FIG. 1B shows a case in which the above-mentioned Doppler CSI report is dropped.

A particular event may mean at least one of the following:
1-1: Setting/resetting CSI reporting.
1-2: Activation of serving cell.
1-3: BWP change (switch).
1-4: Activate SP-CSI.
1-5: Activation of SP CSI-RS/SP CSI-IM/SP ZP CSI-RS resource sets.
1-6: Activation of TCI state of serving cell/non-serving cell.

At least one of X, Y may be determined by the UE/base station based on at least one of the following:
2-1: Defined in the specification. For example, the maximum number of coherent TRPs, "4", may be used.
2-1′: Determined (implicitly) based on specific RRC parameters. For example, K (the number of NZP-CSI-RS resources for AP-CSI-RS-based (e.g., for channel measurement) Doppler-CSI reporting) may be used as X.
2-2: Set by RRC signaling. For example, K (the number of NZP-CSI-RS resources for AP-CSI-RS-based (e.g., for channel measurement) Doppler CSI reporting) may be used as at least one of X and Y. Depending on the type of CSI reporting (or related RRC parameters) to be set, different parameters may be used. When Doppler CSI is set, K may be used as at least one of X and Y.
2-3: Instructed by MAC CE.
2-4: As indicated by DCI.

The above settings/instructions 2-1', 2-2 to 2-4 may be settings/instructions before the occurrence of a "specific event." The values of X and Y according to the above settings/instructions 2-1', 2-2 to 2-4 may be, for example, the following 3-1 to 3-10 (X may be read as Y).

3-1: X=K (the same parameters as those used for AP-CSI-RS).
3-2: X=N4 (RRC parameter of Doppler CSI for setting the length of basis vectors in the Doppler domain). Note that N4 may be used to determine the length of the CSI reporting window.
3-3: X = f(N4) (function of N4).
For example, X=A*N4. A may be defined in the specification, configured in the RRC, configured/indicated by the MAC CE/DCI, or configured/indicated to the UE by a combination of the specification/RRC/MAC CE/DCI.
3-4: X=K _P (active resource count consumed by CSI-RS resources).
3-5: X = f( _KP ) (function of _KP ).
3-6: X=w' (i.e., a value used to calculate the coefficient w for determining the CSI calculation time Z (e.g., the largest Z) of P-CSI/SP-CSI).
3-7: X = f(w') (function of w').
3-8: X=min(K) (the minimum value of the set of K, e.g., the minimum of the candidate values of K for AP-CSI-RS).
3-9: Based on UE implementation.
3-10: Based on UE capability information.

[Variation]
When DRX is configured, a condition for transmitting a Doppler CSI report in the first embodiment may be added that at least one of the CSI-RS transmission opportunities for channel measurement (e.g., X or fewer CSI-RS transmission opportunities) and the CSI-IM transmission opportunities for interference measurement (e.g., Y or fewer CSI-IM transmission opportunities) is within the DRX active time.

If the UE is configured to transmit a CSI report when the DRX timer (drx-onDurationTimer) has not started (e.g., the parameters ps-TransmitOtherPeriodicCSI or TransmitPeriodicL1-RSRP are set), the condition for transmitting the Doppler CSI report of the first embodiment may be added as follows: "There is at least one of the following CSI-RS transmission opportunities for channel measurement (e.g., X or fewer CSI-RS transmission opportunities) and CSI-IM transmission opportunities for interference measurement (e.g., Y or fewer CSI-IM transmission opportunities) within the period indicated by the DRX timer (drx-onDurationTimer)." The DRX timer (drx-onDurationTimer) may be included in the DRX configuration and may be outside or within the DRX active time.

In this embodiment, the opportunity used for CSI reporting may be either a CSI-RS opportunity for channel measurement or a CSI-RS/CSI-IM opportunity for interference measurement. For example, only the CSI-RS for channel measurement to calculate Doppler CSI may be applied as the RS for CSI reporting in this embodiment.

According to the first embodiment, it is possible to ensure sufficient time for processing Doppler CSI reports.

Second Embodiment
When the UE is configured with Doppler CSI reporting (receives the configuration of Doppler CSI reporting) and a specific parameter is configured, the UE may derive a channel measurement value/interference measurement value for calculating the Doppler CSI in the uplink slot n based only on the most recent predetermined number (X times/Y times) of occasions of at least one of the SS/PBCH, NZP CSI-RS, CSI-IM for interference measurement, and NZP CSI-RS associated with the CSI resource configuration that is not later than the CSI reference resource. Then, the UE may transmit the calculated Doppler CSI report. The Doppler CSI and the Doppler CSI report may be interchangeable.

The Doppler CSI report in this disclosure may be a (related) CSI report (periodic CSI/semi-persistent CSI) based on a periodic CSI-RS (P-CSI-RS) or semi-persistent CSI-RS (SP-CSI-RS) configuration.

The specific parameters may be existing parameters (e.g., timeRestrictionForChannelMeasurements, timeRestrictionForInterferenceMeasurements) related to time restrictions for channel measurements/interference measurements for CSI. Or, the specific parameters may be new parameters related to time restrictions for channel measurements/interference measurements for Doppler CSI.

For example, if Doppler CSI is configured and certain parameters are set, the UE may derive channel measurements for calculating the Doppler CSI in uplink slot n based only on the last X opportunities of at least one of the SS/PBCH, NZP CSI-RS associated with the CSI resource configuration that is not later than the CSI reference resource.

For example, if Doppler CSI is configured and certain parameters are set, the UE may derive channel measurements for calculating the Doppler CSI in uplink slot n based only on the last X opportunities of the NZP CSI-RS associated with the CSI resource configuration that are not later than the CSI reference resource.

For example, when Doppler CSI is configured and certain parameters are set, the UE may derive the interference measurement for calculating the Doppler CSI in uplink slot n based only on the last Y opportunities of at least one of CSI-IM, NZP CSI-RS for interference measurement related to the CSI resource configuration that is not later than the CSI reference resource.

2A and 2B are diagrams showing an example of a procedure for reporting Doppler CSI in the second embodiment. FIG. 2A shows a case where a channel measurement value for calculating Doppler CSI is derived based on only the most recent X opportunities of at least one of SS/PBCH and NZP CSI-RS. FIG. 2B shows a case where an interference measurement value for calculating Doppler CSI is derived based on only the most recent Y opportunities of at least one of CSI-IM and NZP CSI-RS for interference measurement related to CSI resource configuration.

At least one of the above-mentioned predetermined number of times, X, Y may be determined by the UE/base station based on at least one of the following 1-1 to 1-4.
1-1: Defined in the specification. For example, the maximum number of coherent TRPs, "4", may be used.
1-1′: Determined (implicitly) based on specific RRC parameters, for example, K (the number of NZP-CSI-RS resources for AP-CSI-RS based Doppler CSI reporting) may be used as X.
1-2: Set by RRC signaling. For example, K (the number of NZP-CSI-RS resources for AP-CSI-RS-based (e.g., for channel measurement) Doppler CSI reporting) may be used as at least one of X and Y. Depending on the type of CSI reporting (or related RRC parameters) to be set, different parameters may be used. When Doppler CSI is set, K may be used as at least one of X and Y.
1-3: Instructed by MAC CE.
1-4: As indicated by DCI.

The UE may not expect/assume certain parameters (e.g., timeRestrictionForChannelMeasurements, timeRestrictionForInterferenceMeasurements) related to Doppler CSI reporting based on P-CSI-RS or SP-CSI-RS. Alternatively, the UE may expect/assume certain parameters related to Doppler CSI reporting based on P-CSI-RS or SP-CSI-RS are always set to "notConfigured".

The values of X and Y set/instructed by 1-1', 1-2 to 1-4 above may be, for example, 2-1 to 2-10 below (X may be read as Y).

2-1: X=K (the same parameters as those used for AP-CSI-RS).
2-2: X=N4 (Doppler-CSI RRC parameter for setting the length of basis vectors in the Doppler domain). Note that N4 may be used to determine the length of the CSI reporting window.
2-3: X = f(N4) (function of N4).
For example, X=A*N4. A may be defined in the specification, configured in the RRC, configured/indicated by the MAC CE/DCI, or configured/indicated to the UE by a combination of the specification/RRC/MAC CE/DCI.
2-4: X=K _P (active resource count consumed by CSI-RS resources).
2-5: X = f( _KP ) (function of _KP ).
2-6: X=w' (i.e., the value used to calculate the coefficient w for determining the CSI calculation time Z (e.g., the largest Z) of P-CSI/SP-CSI).
2-7: X = f(w') (function of w').
2-8: X=min(K) (the minimum value of the set of K, e.g., the minimum of the candidate values of K for AP-CSI-RS).
2-9: Based on UE implementation.
2-10: Based on UE capability information.

In this embodiment, the opportunity used for CSI reporting may be either a CSI-RS opportunity for channel measurement or a CSI-RS/CSI-IM opportunity for interference measurement. For example, only the CSI-RS for channel measurement to calculate Doppler CSI may be applied as the RS for CSI reporting in this embodiment.

According to the second embodiment, it is possible to ensure sufficient time for processing Doppler CSI reports and to calculate Doppler CSI using the required number of transmission opportunities (RS, etc.).

<Additional Information>
[Notification of information to UE]
In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received by the UE from the BS) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

When the above notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in existing standards.

When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

Furthermore, notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically.

[Information notification from UE]
In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission/report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

If the notification is made by a MAC CE, the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.

If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

Furthermore, in the above-mentioned embodiments, notification of any information from the UE may be performed periodically, semi-persistently, or aperiodically.

[Application of each embodiment]
At least one of the above-mentioned embodiments may be applied when a specific condition is satisfied, which may be specified in a standard or may be notified to a UE/BS using higher layer signaling/physical layer signaling.

At least one of the above-described embodiments may be applied only to UEs that have reported a particular UE capability or that support the particular UE capability. Note that "supporting" and "whether to support" may be interpreted as interchangeable.

The specific UE capabilities may indicate at least one of the following:
Supporting specific processing/operations/control/information for at least one of the above embodiments;
Supporting Doppler CSI reporting;
The values of X and Y or the maximum values of X and Y in each embodiment.

Furthermore, the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

The specific UE capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

Furthermore, at least one of the above-mentioned embodiments may be applied when the UE configures/activates/triggers specific information related to the above-mentioned embodiments (or performs the operations of the above-mentioned embodiments) by higher layer signaling/physical layer signaling. For example, the specific information may be any RRC parameters for a specific release (e.g., Rel. 18/19), etc.

If the UE does not support at least one of the above specific UE capabilities or the above specific information is not configured, the UE may apply, for example, the behavior of Rel. 15/16/17.

(Additional Note)
With respect to one embodiment of the present disclosure, the following invention is noted.
[Appendix 1]
A receiver for receiving a Doppler CSI report configuration based on a periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration;
A control unit for dropping the transmission of the report if, after a certain event, neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists by the CSI reference resource;
A terminal having the above configuration.
[Appendix 2]
The terminal according to Supplementary Note 1, wherein when a specific parameter is set, the control unit derives a channel measurement value for calculating the Doppler CSI based only on a predetermined number of recent opportunities of at least one of a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) and a Non Zero Power (NZP) CSI-RS related to a CSI resource setting that is not slower than the CSI reference resource.
[Appendix 3]
The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein when a specific parameter is set, the control unit derives an interference measurement value for calculating the Doppler CSI based only on a predetermined number of recent opportunities of at least one of a CSI-IM and a Non Zero Power (NZP) CSI-RS for interference measurement related to a CSI resource setting that is not slower than the CSI reference resource.
[Appendix 4]
The control unit drops the transmission of the report if, after the specific event, neither a first number of CSI-RS transmission opportunities for channel measurement nor a second number of CSI-Interference Measurement (IM) transmission opportunities for interference measurement are present by the CSI reference resource, and the first number or the second number is a number of NZP-CSI-RS resources for the Doppler CSI report based on an aperiodic CSI-RS (AP-CSI-RS). The terminal according to any one of Supplementary Note 1 to Supplementary Note 3.

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

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

The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

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

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

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

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

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

In addition, the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

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

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

The core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Note that multiple functions may be provided by one network node. In addition, communication with an external network (e.g., the Internet) may be performed via the DN.

The user terminal 20 may be a terminal that supports at least one of the communication methods such as LTE, LTE-A, and 5G.

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

The radio access method may also be called a waveform. In the wireless communication system 1, other radio access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL radio access methods.

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

In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted via PDSCH. User data, upper layer control information, etc. may also be transmitted via PUSCH. Furthermore, Master Information Block (MIB) may also be transmitted via PBCH.

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

Note that the DCI for scheduling the PDSCH may be called a DL assignment or DL DCI, and the DCI for scheduling the PUSCH may be called a UL grant or UL DCI. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

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

A search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in this disclosure may be read as interchangeable.

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

Note that in this disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

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

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

In addition, in the wireless communication system 1, a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).

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

Note that this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the base station 10 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.

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

The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.

The transceiver unit 120 may be configured as an integrated transceiver unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122. The reception unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

The transmitting/receiving antenna 130 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

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

The transceiver unit 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data and control information obtained from the control unit 110 to generate a bit string to be transmitted.

The transceiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

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

In addition, the transmitting unit and receiving unit of the base station 10 in this 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 transceiver 120 may transmit Doppler CSI reporting configuration based on periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration.

The control unit 110 may not receive the report if, after a particular event, neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists by the CSI reference resource.

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

Note that this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the user terminal 20 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.

The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception using the transceiver unit 220 and the transceiver antenna 230, measurement, etc. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.

The transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222. The reception unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

The transmitting/receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

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

The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

The transceiver 220 (transmission processor 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information acquired from the controller 210, and generate a bit string to be transmitted.

The transceiver 220 (transmission processor 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

Whether or not to apply DFT processing may be based on the settings of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, it is not necessary to perform DFT processing as the above-mentioned transmission processing.

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

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

The transceiver 220 (reception processor 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

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

The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources. The interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may be called CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be read as interchangeable.

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

The transceiver 220 may receive Doppler CSI reporting configuration based on periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration.

The control unit 210 may drop the transmission of the report if, after a particular event, neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists by the CSI reference resource.

When certain parameters are set, the control unit 210 may derive channel measurements for calculating the Doppler CSI based only on the most recent predetermined number of opportunities for at least one of the Synchronization Signal/Physical Broadcast Channel (SS/PBCH) and Non Zero Power (NZP) CSI-RS associated with the CSI resource configuration that is not slower than the CSI reference resource.

When a specific parameter is set, the control unit 210 may derive the interference measurement value for calculating the Doppler CSI based only on the most recent predetermined number of opportunities of at least one of CSI-IM, Non Zero Power (NZP) CSI-RS for interference measurement related to the CSI resource setting that is not slower than the CSI reference resource.

The control unit 210 may drop the transmission of the report if, after the specific event, neither the first number of CSI-RS transmission opportunities for channel measurement nor the second number of CSI-Interference Measurement (IM) transmission opportunities for interference measurement are present by the CSI reference resource. The first number or the second number may be the number of NZP-CSI-RS resources for the Doppler CSI report based on aperiodic CSI-RS (AP-CSI-RS).

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

Here, the functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the transmission function may be called a transmitting unit, a transmitter, and the like. In either case, as mentioned above, there are no particular limitations on the method of realization.

For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 6 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

In addition, in this disclosure, the terms apparatus, circuit, device, section, unit, etc. may be interpreted as interchangeable. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.

For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, sequentially, or using other techniques. Furthermore, the processor 1001 may be implemented by one or more chips.

The functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data in the memory 1002 and storage 1003.

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

The processor 1001 also reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. The programs used are those that cause a computer to execute at least some of the operations described in the above embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks.

Memory 1002 is a computer-readable recording medium and may be composed of at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.

Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

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

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

Furthermore, each device such as the processor 1001 and memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

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

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

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

Here, the numerology may be a communication parameter that is applied to at least one of the transmission and reception of a signal or channel. The numerology may indicate, for example, at least one of the following: SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame configuration, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.

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

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

A radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting a signal. A different name may be used for radio frame, subframe, slot, minislot, and symbol. Note that the time units such as frame, subframe, slot, minislot, and symbol in this disclosure may be read as interchangeable.

For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. In other words, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

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

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

Note that when one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. In addition, the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.

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

Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

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

Furthermore, an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

In addition, one or more RBs may be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

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

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

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

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

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

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

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

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

In addition, information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer. Information, signals, etc. may be input/output via multiple network nodes.

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

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

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

Furthermore, notification of specified information (e.g., notification that "X is the case") is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).

The determination may be based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or a comparison of numerical values (e.g., with a predetermined value).

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

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

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

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

In the present disclosure, the antenna port may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the resource may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time/frequency/code/space/power resources. The spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

The above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.

Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be interpreted as interchangeable.

Furthermore, in this disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be interpreted as interchangeable.

Furthermore, in this disclosure, "QCL", "QCL assumptions", "QCL relationship", "QCL type information", "QCL property/properties", "specific QCL type (e.g., Type A, Type D) characteristics", "specific QCL type (e.g., Type A, Type D)", etc. may be read as interchangeable.

In this disclosure, the terms index, identifier (ID), indicator, indication, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. "Spatial relationship information (TCI state)" may be interchangeable as "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. TCI state and TCI may be interchangeable. Spatial relationship information and spatial relationship may be interchangeable.

In this disclosure, terms such as "Base Station (BS)", "Radio base station", "Fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell group", "Carrier", "Component carrier", etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.

In this disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on the information.

In this disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" may be used interchangeably.

A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

The moving body in question refers to an object that can move, and the moving speed is arbitrary, and of course includes the case where the moving body is stationary. The moving body in question includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these. The moving body in question may also be a moving body that moves autonomously based on an operating command.

The moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

FIG. 7 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

The drive unit 41 is composed of at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an Input/Output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46/rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46/rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58.

The information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 59 uses information acquired from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.

The information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.

The driving assistance system unit 64 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving load, such as a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., a Global Navigation Satellite System (GNSS)), map information (e.g., a High Definition (HD) map, an Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., an Inertial Measurement Unit (IMU), an Inertial Navigation System (INS), etc.), an Artificial Intelligence (AI) chip, and an AI processor, and one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize a driving assistance function or an autonomous driving function.

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

The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10 or user terminal 20. The communication module 60 may also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it may function as at least one of the base station 10 and user terminal 20).

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

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

The communication module 60 also stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided on the vehicle 40.

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

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

In this disclosure, operations that are described as being performed by a base station may in some cases also be performed by its upper node. In a network that includes one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination of these.

Each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency. For example, the methods described in this disclosure present elements of various steps using an exemplary order, and are not limited to the particular order presented.

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

As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking in a table, database, or other data structure), ascertaining, etc.

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

Furthermore, "judgment (decision)" may be considered to mean "judging (deciding)" resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" may be considered to mean "judging (deciding)" some kind of action. In this disclosure, "judgment (decision)" may be interpreted interchangeably with the actions described above.

Furthermore, in this disclosure, "determine/determining" may be interpreted interchangeably as "assume/assuming," "expect/expecting," "consider/considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interpreted interchangeably as "assumes not to do...."

In the present disclosure, "expect" may be read as "be expected". For example, "expect(s)..." ("..." may be expressed, for example, as a that clause, a to infinitive, etc.) may be read as "be expected...". "does not expect..." may be read as "be not expected...". Also, "An apparatus A is not expected..." may be read as "An apparatus B other than apparatus A does not expect..." (for example, if apparatus A is a UE, apparatus B may be a base station).

The "maximum transmit power" referred to in this disclosure may mean the maximum transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

As used in this disclosure, the terms "connected" and "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed."

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

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

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

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

In this disclosure, terms such as "less than", "less than", "greater than", "more than", "equal to", etc. may be read as interchangeable. In addition, in this disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "fast", "slow", "wide", "narrow", etc. may be read as interchangeable, not limited to positive, comparative and superlative. In addition, in this disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "fast", "slow", "wide", "narrow", etc. may be read as interchangeable, not limited to positive, comparative and superlative, as expressions with "ith" (i is any integer) (for example, "best" may be read as "ith best").

In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

In the present disclosure, "when A, B", "if A, (then) B", "B upon A", "B in response to A", "B based on A", "B during/while A", "B before A", "B at (the same time as)/on A", "B after A", "B since A", "B until A" and the like may be read as interchangeable. Note that A, B, etc. here may be replaced with appropriate expressions such as nouns, gerunds, and normal sentences depending on the context. Note that the time difference between A and B may be almost 0 (immediately after or immediately before). Also, a time offset may be applied to the time when A occurs. For example, "A" may be read interchangeably as "before/after the time offset at which A occurs." The time offset (e.g., one or more symbols/slots) may be predefined or may be identified by the UE based on signaled information.

In this disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be interpreted as interchangeable.

The invention disclosed herein has been described in detail above, but it is clear to those skilled in the art that the invention disclosed herein is not limited to the embodiments described herein. The description of the present disclosure is intended for illustrative purposes only and does not imply any limitation on the invention disclosed herein.

Claims (6)

A receiver for receiving a Doppler CSI report configuration based on a periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration;
A control unit for dropping the transmission of the report if, after a certain event, neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists by the CSI reference resource;
A terminal having the above configuration. 2. The terminal according to claim 1, wherein, when a specific parameter is set, the control unit derives a channel measurement value for calculating the Doppler CSI based only on a predetermined number of recent opportunities of at least one of a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) and a Non Zero Power (NZP) CSI-RS associated with a CSI resource setting that is not slower than the CSI reference resource. The terminal according to claim 1, wherein, when a specific parameter is set, the control unit derives an interference measurement value for calculating the Doppler CSI based only on a predetermined number of recent opportunities of at least one of a CSI-IM and a Non Zero Power (NZP) CSI-RS for interference measurement related to a CSI resource setting that is not slower than the CSI reference resource. 2. The terminal of claim 1, wherein the control unit drops the transmission of the report if, after the specific event, neither a first number of CSI-RS transmission opportunities for channel measurement nor a second number of CSI-Interference Measurement (IM) transmission opportunities for interference measurement are present by the CSI reference resource, and the first number or the second number is a number of NZP-CSI-RS resources for the Doppler CSI report based on an aperiodic CSI-RS (AP-CSI-RS). receiving a Doppler CSI reporting configuration based on a periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration;
Dropping the transmission of the report if, after a certain event, neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists by the CSI reference resource;
A wireless communication method for a terminal having the above configuration. A transmitter for transmitting a Doppler CSI report configuration based on a periodic or semi-persistent Channel State Information-Reference Signal (CSI-RS) configuration;
A control unit that does not receive the report if neither a CSI-RS transmission opportunity for channel measurement nor a CSI-Interference Measurement (IM) transmission opportunity for interference measurement exists until the CSI reference resource after a specific event;
A base station having

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