WO2023228370A1

WO2023228370A1 - Terminal, wireless communication method, and base station

Info

Publication number: WO2023228370A1
Application number: PCT/JP2022/021603
Authority: WO
Inventors: 春陽越後; 浩樹原田; リューリュー; チーピンピ; ランチン; ツーシンチェン; ヨンリ
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2023-11-30

Abstract

A terminal according to an embodiment of the present disclosure is characterized by having: a reception unit that receives a first configuration of one or more channel state information reference signal (CSI-RS) resources or one or more CSI-RS resource sets for adjustment between a downlink (DL) and an uplink (UP), and a second configuration of one or more reference signal for measurement (SRS) resources or one or more SRS resource sets for adjustment between the DL and the UL; and a control unit that controls at least one of a period between the DL and the UL, an offset and an antenna port, on the basis of the first and second configurations. An embodiment of the present disclosure makes it possible to transmit an appropriate UL signal that corresponds to a DL signal.

Description

Terminal, wireless communication method and base station

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

In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of higher data rates, lower delays, etc. (Non-Patent Document 1). Additionally, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

Successor systems to LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. .

Regarding future wireless communication technology, the use of artificial intelligence (AI) technology such as machine learning (ML) is being considered for network/device control and management.

The base station (gNB) can estimate the DL CSI of the DL frequency band from the UL CSI of the UL frequency band adjacent to the DL frequency band using the AI/ML model. In order to train the AI/ML model on the gNB side, it is preferable that the data sets of UL CSI/RS, which is the input of the model, and DL CSI, which is the output of the model, have a corresponding relationship in the time domain/spatial domain.

However, the method for the UE to transmit a data set of DL CSI and corresponding UL CSI/RS is not clear. As a result, highly accurate channel estimation cannot be achieved, and improvement in communication throughput/communication quality may be suppressed.

Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can transmit an appropriate UL signal corresponding to a DL signal.

A terminal according to an aspect of the present disclosure provides one or more channel state information reference signal (CSI-RS) resources or one or more CSI-RS resource sets for adjustment between downlink (DL) and uplink (UL). and a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for coordination between the DL and UL; and a control unit that controls at least one of a cycle between DL and UL, an offset, and an antenna port based on the setting and the second setting.

According to one aspect of the present disclosure, an appropriate UL signal corresponding to a DL signal can be transmitted.

FIG. 1 is a diagram illustrating an example of an AI model management framework. FIG. 2 is a diagram illustrating an example of specifying an AI model. FIG. 3 shows Rel. 15/16 is a diagram showing CSI report configuration (CSI-ReportConfig) of NR. FIG. 4 is a diagram showing the relationship between the reporting setting (CSI reporting Setting) corresponding to the CSI reporting setting (CSI-ReportConfig) and the resource setting (Resource setting) of the CSI resource setting. FIG. 5 shows Rel. 15/16 is a diagram showing the SRS resource set configuration information element (RRC parameter "SRS-ResourceSet") of NR. FIG. 6A is a diagram illustrating an example of SRS resource configuration information elements. FIG. 6B is a conceptual diagram of SRS resources and SRS resource sets. FIG. 7 is a diagram showing an overview of option 1 of the first embodiment. FIG. 8 is a diagram showing an example of RRC parameters NZP-CSI-RS-Resource and NZP-CSI-RS-ResourceSet in option 1-1 of the first embodiment. FIG. 9 is a diagram showing an example of MAC CE of option 1-2 of the first embodiment. FIG. 10 is a diagram showing an overview of option 1 of the second embodiment. FIG. 11 is a diagram showing an example of RRC parameters SRS-Resource and SRS-ResourceSet in option 1-1 of the second embodiment. FIG. 12 is a diagram showing an example of MAC CE of option 1-2 of the second embodiment. FIG. 13 is a diagram illustrating an example of RRC information elements corresponding to the CSI-RS resource set in option 3 of the modification. FIG. 14 is a diagram illustrating an example of RRC information elements corresponding to the SRS resource set in option 4 of the modification. FIG. 15 is a diagram showing an example of the SRS transmission cycle and the CSI-RS transmission cycle in Embodiment 3-1-1. FIG. 16 is a diagram showing an example of the transmission timing of CSI-RS and SRS when the predetermined ratio N=1. FIG. 17 is a diagram showing an example of the transmission timing of the CSI-RS and SRS when the predetermined ratio N=1/2. FIG. 18 is a diagram showing an example of the transmission timing of CSI-RS and SRS when the predetermined ratio N=2. FIG. 19 is a diagram showing an example of option 1 of embodiment 3-1-2. FIG. 20 is a diagram showing examples of

options

2 and 3 of embodiment 3-1-2. FIG. 21 is a diagram illustrating an example of antenna ports of a UE. FIG. 22 is a diagram showing an example of an antenna port pattern in Embodiment 3-2-1. FIG. 23 is a diagram showing an example of an antenna port pattern in Embodiment 3-2-2. FIG. 24 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 25 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 26 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 27 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 28 is a diagram illustrating an example of a vehicle according to an embodiment.

(Application of Artificial Intelligence (AI) technology to wireless communications)
Regarding future wireless communication technology, the use of AI technology such as machine learning (ML) is being considered for network/device control and management.

For example, for future wireless communication technologies, improved Channel State Information Reference Signal (CSI) feedback (e.g., reduced overhead, improved accuracy, prediction), improved beam management (e.g., improved accuracy, time The use of AI technology is being considered to improve positioning (e.g., position estimation/prediction in the spatial domain), position measurement (e.g., position estimation/prediction), and so on.

FIG. 1 is a diagram illustrating an example of an AI model management framework. In this example, each stage related to the AI model is shown as a block. This example is also expressed as AI model life cycle management.

The data collection stage corresponds to the stage of collecting data for generating/updating an AI model. The data collection stage includes data reduction (e.g., deciding which data to transfer for model training/model inference), data transfer (e.g., to entities performing model training/model inference (e.g., UE, gNB)), and transfer data).

In the model training stage, model training is performed based on the data (training data) transferred from the collection stage. This stage includes data preparation (e.g., performing data preprocessing, cleaning, formatting, transformation, etc.), model training/validation, and model testing (e.g., ensuring that the trained model meets performance thresholds). , model exchange (e.g., transferring a model for distributed learning), model deployment/updating (deploying/updating a model to entities performing model inference), and the like.

In the model inference stage, model inference is performed based on the data (inference data) transferred from the collection stage. This stage includes data preparation (e.g., performing data preprocessing, cleaning, formatting, transformation, etc.), model inference, model monitoring (e.g., monitoring the performance of model inference), and model performance feedback (the entity performing model training). (feedback of model performance to actors), output (provide model output to actors), etc.

The Actor stage provides information necessary for action triggers (e.g., deciding whether to trigger an action on other entities), feedback (e.g., training data/inference data/performance feedback). (feedback) etc.

Note that, for example, training of a model for mobility optimization may be performed, for example, in Operation, Administration and Maintenance (Management) (OAM) in a network (Network (NW)) / gNodeB (gNB). good. The former has advantages in interoperability, large storage capacity, operator manageability, and model flexibility (e.g., feature engineering). In the latter case, the advantage is that there is no need for model update latency or data exchange for model development. Inference of the above model may be performed in the gNB, for example.

Also, depending on the use case, the entity that performs training/inference may be different.

For example, for AI-assisted beam management based on measurement reports, the OAM/gNB may perform model training and the gNB may perform model inference.

For AI-assisted UE assisted positioning, a Location Management Function (LMF) may perform model training, and the LMF may perform model inference.

For CSI feedback/channel estimation using an autoencoder, the OAM/gNB/UE may perform model training and the gNB/UE (jointly) may perform model inference.

For AI-assisted beam management based on beam measurements or AI-assisted UE-based positioning, the OAM/gNB/UE may perform model training and the UE may perform model inference.

By the way, it is desirable that data/AI models be treated as proprietary assets. For example, creating highly accurate AI models takes a huge amount of money and time, so if another company finds out the content of an AI model created by a company, it will be a big disadvantage. For this reason, it is being considered to make part of the information regarding the AI model unavailable (or inferred) for UEs/gNBs provided by different vendors.

Identifier (ID)-based model approaches can be one way to manage AI models in such scenarios. For example, the NW/gNB does not know the details of the AI model, but may only know some information about the AI model (for example, which ML model is used for what purpose in the UE) for AI model management. I can do it.

FIG. 2 is a diagram showing an example of specifying an AI model. In this example, the UE and NW (eg, base station (BS)) can recognize models #1 and #2 (although they may not fully understand the details of the models). The UE may report, for example, the performance of model #1 and the performance of model #2 to the NW, and the NW may instruct the UE about the AI model to use.

In this disclosure, the UE/BS inputs channel state information, reference signal measurements, etc. to the ML model to obtain highly accurate channel state information/measurements/beam selection/position, future channel state information, etc. /Wireless link quality, etc. may be output.

Note that in this disclosure, AI may be read as an object (also referred to as a target, object, data, function, program, etc.) that has (implements) at least one of the following characteristics:
・Estimation based on observed or collected information;
- Selection based on observed or collected information;
- Predictions based on observed or collected information.

In the present disclosure, an object may be, for example, an apparatus, a device, such as a terminal or a base station. Furthermore, in the present disclosure, an object may correspond to a program/model/entity that operates on the device.

Furthermore, in this disclosure, the ML model may be replaced by an object that has (implements) at least one of the following characteristics:
・Produce estimates by feeding information,
・Predict the estimated value by giving information,
・Discover characteristics by providing information,
・Select an action by providing information.

Additionally, in the present disclosure, ML model, model, AI model, predictive analytics, predictive analysis model, etc. may be read interchangeably. Further, the ML model may be derived using at least one of regression analysis (eg, linear regression analysis, multiple regression analysis, logistic regression analysis), support vector machine, random forest, neural network, deep learning, and the like. In this disclosure, a model may be interpreted as at least one of an encoder, a decoder, a tool, etc.

Based on the input information, the ML model outputs at least one information such as an estimated value, a predicted value, a selected action, a classification, etc.

The ML model may include supervised learning, unsupervised learning, reinforcement learning, and the like. Supervised learning may be used to learn general rules that map inputs to outputs. Unsupervised learning may be used to learn features of the data. Reinforcement learning may be used to learn actions to maximize a goal.

In this disclosure, generation, calculation, derivation, etc. may be read interchangeably. In this disclosure, implementation, operation, operation, execution, etc. may be read interchangeably. In this disclosure, training, learning, updating, retraining, etc. may be used interchangeably. In this disclosure, inference, after-training, production use, actual use, etc. may be read interchangeably. Signal may be interchanged with signal/channel.

(CSI report or reporting)
Rel. 15 In NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) transmits channel state information (CSI) based on a reference signal (RS) (or resources for the RS). )) (also referred to as determination, calculation, estimation, measurement, etc.) and transmits (also referred to as report, feedback, etc.) the generated CSI to the network (for example, a base station). The CSI may be transmitted to the base station using, for example, an uplink control channel (eg, Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (eg, Physical Uplink Shared Channel (PUSCH)).

The RS used to generate CSI is, for example, a channel state information reference signal (CSI-RS), a synchronization signal/physical broadcast channel (SS/PBCH) block, or a synchronization signal/physical broadcast channel (SS/PBCH) block. The signal may be at least one of a synchronization signal (SS), a demodulation reference signal (DMRS), or the like.

The CSI-RS may include at least one of a Non-Zero Power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS/PBCH block is a block that includes SS and PBCH (and corresponding DMRS), and may be called an SS block (SSB) or the like. Further, the SS may include at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

Note that CSI includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), and a SS /PBCH block resource indicator (SSBRI), layer indicator (LI), rank indicator (RI), L1-RSRP (reference signal reception in layer 1) Power (Layer 1 Reference Signal Received Power)), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), etc. even if it contains at least one of good.

The UE may receive information regarding CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, "CSI-ReportConfig" of an information element (IE) of radio resource control (RRC). Note that in the present disclosure, RRC IE may be interchanged with RRC parameters, upper layer parameters, and the like.

The report configuration information (for example, "CSI-ReportConfig" of the RRC IE) may include, for example, at least one of the following.
- Information about the type of CSI report (report type information, e.g. "reportConfigType" of RRC IE)
- Information regarding one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, e.g. "reportQuantity" of RRC IE)
- Information regarding the RS resource used to generate the relevant amount (the relevant CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of the RRC IE)
- Information regarding the frequency domain targeted for CSI reporting (frequency domain information, e.g. "reportFreqConfiguration" of RRC IE)

For example, the report type information may include periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, or semi-persistent (semi-persistent, semi-persistent) reporting. A Semi-Persistent CSI (SP-CSI) report may be indicated.

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

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

The frequency domain information may also indicate the frequency granularity of the CSI report. The frequency granularity may include, for example, widebands and subbands. Wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (component carrier (CC), cell, serving cell), or the entire bandwidth part (BWP) within a certain carrier. There may be. The wideband may also be referred to as a CSI reporting band, the entire CSI reporting band, or the like.

Further, a subband is a part of a wideband, and may be composed of one or more resource blocks (Resource Block (RB) or Physical Resource Block (PRB)). The size of the subband may be determined according to the size of the BWP (number of PRBs).

The frequency domain information may indicate whether wideband or subband PMI is to be reported (the frequency domain information may include, for example, the RRC IE used to determine whether to report wideband or subband PMI). (may include "pmi-FormatIndicator"). The UE may determine the frequency granularity of the CSI report (ie, either wideband PMI report or subband PMI report) based on at least one of the report amount information and frequency domain information.

If wideband PMI reporting is configured (determined), one wideband PMI may be reported for the entire CSI reporting band. On the other hand, if subband PMI reporting is configured, a single wideband indication i1 is reported for the entire CSI reporting band, and a subband indication for each of one or more subbands within the entire CSI reporting band. (one subband indication) i2 (eg, subband indication of each subband) may be reported.

The UE performs channel estimation using the received RS and estimates a channel matrix H. The UE feeds back an index (PMI) that is determined based on the estimated channel matrix.

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

In the space domain, a CSI report may include one or more types of CSI. For example, the CSI may include at least one of a first type (type 1 CSI) used for single beam selection and a second type (type 2 CSI) used for multi beam selection. A single beam may be expressed as a single layer, and a multibeam may be expressed as a plurality of beams. Further, type 1 CSI does not assume multi-user multiple input multiple output (MIMO), and type 2 CSI may assume multi-user MIMO.

The codebook may include a codebook for type 1 CSI (also referred to as type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to as type 2 codebook, etc.). Further, type 1 CSI may include type 1 single panel CSI and type 1 multi-panel CSI, and different codebooks (type 1 single panel codebook, type 1 multi-panel codebook) may be defined for each.

In this disclosure, Type 1 and Type I may be read interchangeably. In this disclosure, Type 2 and Type II may be interchanged.

The uplink control information (UCI) type may include at least one of Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK), scheduling request (SR), and CSI. UCI may be carried by PUCCH or PUSCH.

Rel. In 15 NR, the UCI may include one CSI part for wideband PMI feedback. CSI report #n includes PMI wideband information if reported.

Rel. In 15 NR, the UCI may include two CSI parts for subband PMI feedback. CSI part 1 includes wideband PMI information. CSI part 2 includes one wideband PMI information and some subband PMI information. CSI part 1 and CSI part 2 are encoded separately.

FIG. 3 shows Rel. 15/16 is a diagram showing CSI report configuration (CSI-ReportConfig) of NR. Rel. 15/16 In NR, the UE is configured by an upper layer with a report setting of N (N≧1) CSI report settings and a resource setting of M (M≧1) CSI resource settings. For example, the CSI report configuration (CSI-ReportConfig) includes channel measurement resource settings (resourcesForChannelMeasurement), interference CSI-IM resource settings (csi-IM-ResourceForInterference), and interference NZP-CSI-RS settings (nzp-CSI-RS -ResourceForInterference), report quantity (reportQuantity), report type (periodic(p)/semipersistent(sp)/periodic(a))), codebook settings (CodebookConfig), etc. Each of the channel measurement resource setting, interference CSI-IM resource setting, and interference NZP-CSI-RS setting is associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration includes a list of CSI-RS resource sets (CSI-RS-ResourceSetList, eg, NZP-CSI-RS resource set or CSI-IM resource set).

FIG. 4 is a diagram showing the relationship between the reporting setting (CSI reporting Setting) corresponding to the CSI reporting setting (CSI-ReportConfig) and the resource setting (Resource setting) of the CSI resource setting. As shown in FIG. 4, the resource settings include multiple CSI-RS resource sets. Further, the CSI-RS resource set includes a plurality of CSI-RS resources. A resource setting is associated with one or more reporting settings.

(SRS)
In NR, measurement reference signals (Sounding Reference Signals (SRS)) have a wide variety of uses. NR SRS is used not only for uplink (UL) CSI measurement, which is also used in existing LTE (LTE Rel. 8-14), but also for downlink (DL) CSI measurement, beam It is also used for beam management, etc.

The UE may be configured with one or more SRS resources. SRS resources may be identified by an SRS Resource Index (SRI).

Each SRS resource may have one or more SRS ports (may correspond to one or more SRS ports). For example, the number of ports for each SRS may be 1, 2, 4, etc.

The UE may be configured with one or more SRS resource sets. One SRS resource set may be associated with a predetermined number of SRS resources. The UE may use upper layer parameters in common with respect to SRS resources included in one SRS resource set. Note that the resource set in the present disclosure may be read as a set, resource group, group, or the like.

Information regarding SRS resources or resource sets may be configured in the UE using upper layer signaling, physical layer signaling, or a combination thereof.

The SRS configuration information element (for example, the RRC information element "SRS-Config") may include an SRS resource set configuration information element, an SRS resource configuration information element, etc.

FIG. 5 shows Rel. 15/16 is a diagram showing the SRS resource set configuration information element (RRC parameter "SRS-ResourceSet") of NR. The SRS resource set configuration information element may include information on the SRS resource type (resourceType), SRS usage (usage), report type (Report type), codebook configuration (CodebookConfig), and the like. The SRS resource set configuration information element may further include an SRS resource set ID (Identifier) (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, and the like.

Here, the SRS resource type may indicate the time domain behavior of SRS resource configuration, such as Periodic SRS (P-SRS), Semi-Persistent SRS ( SP-SRS) or aperiodic SRS (A-SRS). Note that the UE may transmit the P-SRS and SP-SRS periodically (or periodically after activation). The UE may transmit the A-SRS based on the DCI's SRS request.

In addition, the usage of SRS (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") is, for example, beam management (beamManagement), codebook (CB), non-codebook (CB), non-codebook (NCB)), antenna switching (antenna switching), etc. For example, the SRS for codebook or non-codebook use may be used to determine a precoder for SRI-based codebook-based or non-codebook-based Physical Uplink Shared Channel (PUSCH) transmission.

SRS for beam management purposes may assume that only one SRS resource for each SRS resource set can be transmitted at a given time instant. Note that in the same Bandwidth Part (BWP), if a plurality of SRS resources corresponding to the same time domain behavior belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.

The SRS resource configuration information element (for example, "SRS-Resource" of the RRC parameter) includes the resource type (resourceType), the SRS resource ID (SRS-ResourceId), the number of transmission combs, etc. (FIG. 6A). The resource type is similar to the resource type in the SRS resource set configuration described above, and may indicate periodic SRS, semi-persistent SRS, or aperiodic SRS. The SRS resource configuration information elements further include the number of SRS ports, the SRS port number, the SRS resource mapping (e.g., time and/or frequency resource location, resource offset, period of the resource, number of repetitions, number of SRS symbols, SRS bandwidth, etc.) , hopping related information, SRS resource type, sequence ID, spatial relationship information, etc. One or more SRS resources may be included in an SRS resource set (FIG. 6B).

(analysis)
In TDD systems, channel reciprocity can be used to obtain DL CSI from UL reference signals. In FDD systems, channel characteristics/frequency bands are different between DL and UL, so channel reciprocity cannot be fully utilized like in TDD systems, so DL CSI is obtained from the PMI report generated by the UE after CSI estimation. are doing.

As a result, in the FDD system, there are problems such as the UL payload for CSI feedback becoming expensive and CSI estimation becoming incomplete depending on the UE's capabilities.

For example, the base station (gNB) can infer the DL CSI of the DL frequency band from the UL CSI of the UL frequency band adjacent to the DL frequency band using an AI/ML model. Since gNB can obtain UL CSI from UL SRS, it can solve the problem of CSI feedback payload and incomplete CSI estimation on the UE side.

In order to train the AI/ML model on the gNB side, the data sets of UL CSI/RS (for example, SRS), which is the input of the model, and DL CSI, which is the output of the model, must have a matching relationship (correspondence). is preferred. For example, it is preferable that the UL spectrum and the DL spectrum match (correspond).

For example, in the time domain, DL CSI and UL CSI/RS preferably have a consistent time difference within the data set. In the spatial domain, it is preferable that the transmission and reception ports of DL CSI and UL CSI/RS match within the data set.

However, it is not clear how a UE can transmit an appropriate UL signal that corresponds to a DL signal. As a result, highly accurate channel estimation cannot be achieved, and improvement in communication throughput/communication quality may be suppressed.

Therefore, the present inventors came up with a method for the UE to transmit an appropriate UL signal corresponding to a DL signal.

Although it is more effective to apply the method of the present disclosure to an FDD system as described above, it may also be applied to a TDD system.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to each embodiment may be applied singly or in combination.

In the present disclosure, "A/B" and "at least one of A and B" may be read interchangeably. Furthermore, in the present disclosure, "A/B/C" may mean "at least one of A, B, and C."

In the present disclosure, "activate", "deactivate", "indicate", "select", "configure", "update", "determine", etc. may be read interchangeably. In this disclosure, supporting, controlling, being able to control, operating, capable of operating, etc. may be read interchangeably.

In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, upper layer parameters, fields, Information Elements (IEs), settings, etc. may be read interchangeably. In the present disclosure, the terms Medium Access Control Element (CE), update command, activation/deactivation command, etc. may be read interchangeably.

In the present disclosure, the upper layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like. Broadcast information includes, for example, a master information block (MIB), a system information block (SIB), a minimum system information (RMSI), and other system information ( Other System Information (OSI)) may also be used.

In the present disclosure, the physical layer signaling may be, for example, downlink control information (DCI), uplink control information (UCI), etc.

In this disclosure, an index, an identifier (ID), an indicator, a resource ID, etc. may be read interchangeably. In this disclosure, sequences, lists, sets, groups, groups, clusters, subsets, etc. may be used interchangeably.

The settings/instructions may be read as activation or activation settings/instructions. RRC/MAC CE/DCI may be replaced with at least one of the above upper layer signaling/physical layer signaling. CSI-RS and CSI may be read interchangeably.

The terms "SRS resource set" and "SRS resource" in this disclosure may be interchanged. The CSI-RS resource set and CSI-RS resource in this disclosure may be read interchangeably. Adjustment, determination, selection, setting, and control in the present disclosure may be read interchangeably.

(Wireless communication method)
<First embodiment>
The UE configures/instructs one or more CSI-RS resources or one or more CSI-RS resource sets (first configuration/indication) from the base station (gNB) (option 1). Alternatively, the UE selects/determines one or more CSI-RS resources or one or more CSI-RS resource sets for coordination between DL and UL, and uses UL signals (e.g. PUCCH/PUSCH) to communicate with the base station. (gNB) (option 2). The UE controls (adjusts) at least one of the period, offset, and antenna port between DL and UL based on the settings/instructions. This control will be explained in the third embodiment below.

[Option 1]
The UE identifies one or more non-zero power CSI-RS resource set IDs (NZP-CSI-RS- ResourceSetId) settings/instructions may be received. The UE configures/sets a non-zero power CSI-RS resource ID (NZP-CSI-RS-ResourceId) corresponding to one or more CSI-RS resources for coordination between DL and UL using RRC/MAC CE/DCI, etc. Instructions may be received. The settings/instructions by the RRC will be explained in detail in option 1-1, the settings/instructions by the MAC CE will be explained in option 1-2, and the settings/instructions by the MAC CE will be explained in detail in option 1-3.

FIG. 7 is a diagram showing an overview of option 1 of the first embodiment. The UE configures/instructs at least one CSI-RS resource set or CSI-RS resource from among the multiple CSI-RS resource sets or CSI-RS resources, for example, by RRC/MAC CE/DCI, etc. receive.

《Option 1-1》
The UE may receive information indicating coordination between DL and UL through RRC signaling (RRC configuration). For example, at least one of the RRC parameter corresponding to the CSI-RS resource (NZP-CSI-RS-Resource) and the RRC parameter corresponding to the CSI-RS resource set (NZP-CSI-RS-ResourceSet) is set between the DL and the UL. It may also include information indicating adjustment (DL-UL-alignment).

FIG. 8 is a diagram showing an example of RRC parameters NZP-CSI-RS-Resource and NZP-CSI-RS-ResourceSet in option 1-1 of the first embodiment. The new NZP-CSI-RS-Resource and NZP-CSI-RS-ResourceSet include information indicating alignment between DL and UL (DL-UL-alignment). For example, setting DL-UL-alignment to 0 means that the adjustment between DL and UL is invalid (or valid) for the corresponding NZP-CSI-RS-Resource/NZP-CSI-RS-ResourceSet. It may also be shown that Setting DL-UL-alignment to 1 means that the adjustment between DL and UL is valid (or invalid) for the corresponding NZP-CSI-RS-Resource/NZP-CSI-RS-ResourceSet. May be shown.

《Option 1-2》
Even if the UE receives a configuration/instruction (activation configuration/instruction) corresponding to a CSI-RS resource or a CSI-RS resource set for coordination between DL and UL from a base station (gNB) through the MAC CE, good. Some bits of the MAC CE are used to indicate settings/instructions for coordination between DL and UL, and other bits are used to indicate the ID or one or more of the corresponding active CSI-RS resources. The ID of the CSI-RS resource set may be indicated.

FIG. 9 is a diagram showing an example of MAC CE of option 1-2 of the first embodiment. The A/D field indicates whether to activate or deactivate the alignment between DL and UL (DL-UL alignment). This field is set to 1 (or 0) if the adjustment is activated (adjustment is made), and 0 (or 1) otherwise. Other fields (for example, any R field) may be used as the field indicating whether to activate or deactivate the adjustment.

The Serving Cell ID field indicates the serving cell ID to which the MAC CE is applied. The length of this field is, for example, 5 bits. The BWP ID field indicates the DL BWP to which the MAC CE is applied, as a code point of the BWP indication (bandwidth part indicator) field of the DCI. The length of the BWP ID field is, for example, 2 bits.

The NZP CSI-RS Resource Set ID field contains the index of the NZP-CSI-RS-ResourceSet containing the NZP CSI-RS resources, and the CSI-RS containing one or more CSI-RS resources for which coordination between DL and UL is activated. Indicates an RS resource set.

The IM field indicates the presence of a CSI-RS resource set ID field included in the same octet. If the IM field is set to 1, there is a CSI-RS Resource Set ID field included in the octet. Otherwise, the CSI-RS resource set ID field does not exist. The CSI-RS resource ID field stores an index of nzp-CSI-RS-ResourceId indicating a CSI-RS resource that is activated for coordination between DL and UL. R is a reserved bit and is set to 0.

《Option 1-3》
The UE receives settings/instructions corresponding to one or more CSI-RS resources or one or more CSI-RS resource sets for DL and UL alignment (DL-UL alignment) from the base station (gNB) using the DCI. You may receive it.

The UE receives an instruction for coordination between the DL and UL in which reserved bits of the DCI are used, and, in accordance with the instruction, identifies the ID of the CSI-RS resource or the CSI-RS resource for which coordination between the DL and the UL is activated. The ID of the set may be received using the PDSCH.

The UE receives an indication of coordination between the DL and UL using the already existing DCI field (e.g. in Rel. 15/16), and in response to the indication, the CSI- The RS resource ID or the CSI-RS resource set ID may be transmitted using the PDSCH.

The UE receives an indication of DL-to-UL coordination using a specific type of Radio Network Temporary Identifier (RNTI) in the DCI, and in response to the instruction, the CSI-RS in which the DL-to-UL coordination is activated. The resource ID or the CSI-RS resource set ID may be transmitted using the PDSCH.

[Option 2]
The UE selects/determines one or more CSI-RS resources for coordination between DL and UL (without configuration/indication from the base station), and identifies the corresponding one or more CSI-RS resources ID ( NZP-CSI-RS-ResourceId) may be transmitted (feedback) to the base station (gNB) in a UL signal (for example, PUCCH/PUSCH). The UE selects/determines one or more CSI-RS resource sets (without using configuration/instructions from the base station), and assigns IDs (NZP-CSI-RS-ResourceSetId) of the corresponding one or more CSI-RS resource sets. ) may be transmitted (feedback) to the base station (gNB) in a UL signal (for example, PUCCH/PUSCH).

The NZP-CSI-RS-ResourceSetId sent by the UE indicates one of the NZP-CSI-RS-ResourceSets included in the list (nzp-CSI-RS-ResourceSetToAddModList) set by the base station through upper layer signaling (RRC), etc. May be shown. The NZP-CSI-RS-ResourceId sent by the UE indicates one of the NZP-CSI-RS-Resources included in the list (nzp-CSI-RS-ResourceToAddModList) set by the base station through upper layer signaling (RRC), etc. May be shown.

According to this embodiment, the CSI-RS resource or CSI-RS resource set used for coordination between DL and UL becomes clear, so the UE can appropriately perform coordination between DL and UL.

<Second embodiment>
The UE configures/instructs (second configuration/instructions) one or more SRS resources or one or more SRS resource sets for coordination between DL and UL (DL-UL alignment) using RRC/MAC CE/DCI, etc. ) may be received from the base station (gNB) (option 1). Alternatively, the UE selects/determines one or more CSI-RS resources or one or more CSI-RS resource sets for coordination between DL and UL, and uses UL signals (e.g. PUCCH/PUSCH) to communicate with the base station. (gNB) (option 2). The UE controls at least one of the period, offset, and antenna port between DL and UL based on the settings/instructions. This control will be explained in the third embodiment below.

[Option 1]
The UE uses the SRS-ResourceSetId of the SRS resource set for coordination between the DL and UL configured from the base station (gNB), and the DL and UL configured from the base station (gNB) by RRC/MAC CE/DCI etc. may receive the srs-ResourceId of the SRS resource for coordination between.

FIG. 10 is a diagram showing an overview of option 1 of the second embodiment. The UE configures/instructs coordination between DL and UL for at least one SRS resource set or SRS resource among multiple SRS resource sets or multiple SRS resources, for example, by RRC/MAC CE/DCI, etc. Activation settings/instructions).

《Option 1-1》
The UE may receive information indicating coordination between DL and UL through higher layer signaling (RRC signaling, RRC configuration). For example, at least one of the RRC parameters SRS-Resource and SRS-ResourceSet may include information indicating alignment between DL and UL (DL-UL-alignment).

FIG. 11 is a diagram showing an example of RRC parameters SRS-Resource and SRS-ResourceSet in option 1-1 of the second embodiment. The new SRS-Resource and SRS-ResourceSet include information indicating alignment between DL and UL (DL-UL-alignment). For example, DL-UL-alignment being set to 0 may indicate that coordination between DL and UL is invalid (or valid) for the corresponding SRS-Resource/SRS-ResourceSet. Setting DL-UL-alignment to 1 may indicate that adjustment between DL and UL is valid (or invalid) for the corresponding SRS-Resource/SRS-ResourceSet.

《Option 1-2》
The UE may receive settings/instructions (activation settings/instructions) corresponding to SRS resources or SRS resource sets for coordination between DL and UL from the base station (gNB) using the MAC CE. Some bits of the MAC CE are used to indicate settings/instructions for coordination between DL and UL, and other bits are used to indicate the corresponding active one or more SRS resources or one or more SRS resource sets. ID may be shown.

FIG. 12 is a diagram showing an example of MAC CE of option 1-2 of the second embodiment. The A/D field indicates whether to activate or deactivate the alignment between DL and UL (DL-UL alignment). This field is set to 1 (or 0) if the adjustment is activated (adjustment is made), and 0 (or 1) otherwise. Other fields (for example, any R field) may be used as the field indicating whether to activate or deactivate the adjustment.

The SRS resource set ID field contains an index of an SRS-ResourceSet containing SRS resources, and indicates an SRS resource set containing one or more SRS resources for which coordination between DL and UL is activated.

The IM field indicates the presence of the SRS Resource Set ID field included in the same octet. If the IM field is set to 1, there is an SRS Resource Set ID field included in the octet. Otherwise, the SRS resource set ID field does not exist. The SRS Resource ID field stores an index of srs-ResourceId indicating the SRS resource for which coordination between DL and UL is activated. R is a reserved bit and is set to 0.

《Option 1-3》
The UE may receive settings/instructions corresponding to SRS resources or SRS resource sets for DL-UL alignment from the base station (gNB) using the DCI.

The UE receives an indication of coordination between the DL and UL in which reserved bits of the DCI are used, and in response to the instruction, determines the ID of the SRS resource or the ID of the SRS resource set for which coordination between the DL and the UL is activated. , PDSCH may be used for reception.

The UE receives an indication of coordination between DL and UL using the already existing (e.g. in Rel. or the ID of the SRS resource set may be received using the PDSCH.

The UE receives an indication of DL-to-UL coordination using a specific type of RNTI in the DCI, and depending on the instruction, the ID of the SRS resource or the SRS resource set for which the DL-to-UL coordination is activated. The ID may be received using the PDSCH.

[Option 2]
The UE selects/determines one or more SRS resources for coordination between DL and UL, and sends the corresponding one or more SRS resource IDs (srs-ResourceId) to the base station (gNB) in the UL signal (e.g. PUCCH/PUSCH). ) may be sent (feedback). The UE selects/determines one or more SRS resource sets for coordination between DL and UL, and transmits the corresponding one or more SRS resource set IDs (SRS-ResourceSetId) to the base station in the UL signal (e.g. PUCCH/PUSCH). It may also be transmitted (feedback) to (gNB).

The SRS-ResourceSetId transmitted by the UE may indicate any of the SRS-ResourceSets included in the list (SRS-ResourceSetToAddModList) set by the base station through upper layer signaling (RRC) or the like. The srs-ResourceId transmitted by the UE may indicate any of the SRS-Resources included in the list (SRS-ResourceToAddModList) set by the base station through upper layer signaling (RRC) or the like.

According to this embodiment, the SRS resource or SRS resource set used for adjustment between DL and UL becomes clear, so the UE can appropriately perform adjustment between DL and UL.

<Modified example>
A modified example of the method of setting/instructing SRS and CSI-RS for DL-UL alignment (DL-UL alignment) described in the first embodiment and second embodiment will be described.

[Option 1]
The UE receives a configuration/indication that coordination between DL and UL is valid for the CSI-RS resource set (for example, RRC parameter DL-UL alignment=1 in the first embodiment), and If a specific SRS resource set based on the specifications is specified, it may be determined that coordination between DL and UL is configured/instructed. The specific SRS resource set may be, for example, an SRS resource set whose usage is antenna switching. This is because an SRS resource set whose purpose is antenna switching is used for DL CSI estimation.

[Option 2]
The UE receives a configuration/indication that coordination between DL and UL is valid for the SRS resource set (e.g., RRC parameter DL-UL alignment=1 in the second embodiment) and complies with the specification. If a specific CSI-RS resource set based on the CSI-RS resource set is specified, it may be determined that coordination between DL and UL is configured/instructed for the SRS resource set and the CSI-RS resource set.

The specific CSI-RS resource set may be, for example, an NZP CSI-RS resource set that corresponds to a tracking reference signal (TRS) (trs-info=true). In this case, the UE changes the SRS transmission timing based on the TRS. This is because periodic CSI-RSs, especially TRSs, are shared by most UEs, so it is preferable not to dynamically and frequently change TRS resource mapping for coordination between DL and UL.

The specific CSI-RS resource set may be a CSI-RS resource set that includes associated CSI-RSs within the SRS resource set.

[Option 3]
If the SRS resource set ID for coordination between DL and UL is set in the RRC information element (NZP-CSI-RS-ResourceSet) corresponding to the CSI-RS resource set, the UE shall It may be determined that coordination between DL and UL has been set/instructed for the set and the corresponding SRS resource set (FIG. 13).

[Option 4]
The UE sets a CSI-RS resource set ID (nzp-CSI-ResourceSetId) for coordination between DL and UL in the RRC information element (SRS-ResourceSet in SRS-Config) corresponding to the SRS resource set. In this case, it may be determined that adjustment between DL and UL has been set/instructed for the SRS resource set and the CSI-RS resource set (FIG. 14).

[Option 5]
The SRS resource set/CSI-RS resource set for coordination between DL and UL configured in options 1 to 4 may be mapped (activated/instructed) by MAC CE/DCI.

The SRS resource set in the modified example may be read as SRS resource. The CSI-RS resource set in the modified example may be replaced with CSI-RS resource.

The UE configures/instructs one or more CSI-RS resources or one or more CSI-RS resource sets for coordination between DL and UL (DL-UL alignment) (first embodiment), or configures/instructs DL and UL alignment. If the configuration/instruction (second embodiment) of one or more SRS resources or SRS resource sets for DL-UL alignment is not received, it may be determined not to transmit the CSI report. In this case, it is considered that the base station has been able to estimate the DL CSI with sufficiently high accuracy, so it is considered that the setting/instruction was not made.

Alternatively, the UE may decide not to transmit the CSI report when receiving the above settings/instructions (first embodiment/second embodiment). This is because the UE can estimate the DC CSI from the UL CSI (SRS) with high accuracy at the base station by performing the adjustment described below (in the third embodiment).

<Third embodiment>
In the third embodiment, when the UE is configured/instructed to adjust between DL and UL (DL-UL alignment) by RRC/MAC CE/DCI, etc., the UE performs the following operations. The settings/instructions include settings/instructions for one or more CSI-RS resources or one or more CSI-RS resource sets for coordination between DL and UL in the first embodiment, and settings/instructions for one or more CSI-RS resource sets in the second embodiment. It may be at least one of the settings/instructions of one or more SRS resources or SRS resource sets for coordination between DL and UL, or it may be other settings/instructions.

[Embodiment 3-1]
The UE determines the period/offset of the SRS resource or SRS resource set (for example, the SRS resource/SRS resource set configured/instructed or selected by the method of the second embodiment) for coordination between the DL and the UL. and the period of the CSI-RS resource or CSI-RS resource set (for example, the CSI-RS resource/CSI-RS resource set configured/instructed or selected by the method of the first embodiment) for coordination between the UL and the UL. Adjust based on offset. The UE receives an adjustment instruction between DL and UL through, for example, RRC/MAC CE/DCI, and adjusts the period/offset of the SRS resource/SRS resource set based on the instruction.

Note that in some examples of the present embodiment, the UE controls the SRS transmission timing to be the same as the CSI-RS reception timing, but it does not have to be completely the same; for example, the UE controls the SRS transmission timing to be the same as the CSI-RS reception timing; May be adjusted. For example, the UE may adjust the SRS transmission symbol to a symbol other than the CSI-RS reception symbol and a symbol within the CSI-RS reception slot. The UE may adjust the transmitted symbol of the SRS to the symbol in the slot next to the received slot of the CSI-RS. The UE may adjust the transmitted symbol of the SRS to be the symbol next to the received symbol of the CSI-RS. This allows interference to be avoided. The UE may determine the time difference between the received symbols/slots of the CSI-RS and the transmitted symbols/slots of the SRS based on predetermined rules or settings/instructions via physical layer signaling/upper layer signaling. The UE may adjust/determine the offset between the SRS and the CSI-RS based on predetermined rules or settings/instructions via physical layer signaling/upper layer signaling.

《Embodiment 3-1-1》
The UE sets the transmission period of the SRS resource/SRS resource set for adjustment between DL and UL at a predetermined ratio to the transmission period of CSI-RS resource or CSI-RS resource set for adjustment between DL and UL. (For example, it may be adjusted to be an integral multiple).

The value (N) of the predetermined ratio may be defined in the specifications, or may be set/instructed by the base station by RRC/MAC CE/DCI. The predetermined ratio value may be selected by the UE and fed back (eg, as UE capabilities) to the base station using the UL signal (eg, UE capabilities).

FIG. 15 is a diagram showing an example of the SRS transmission cycle and the CSI-RS transmission cycle in Embodiment 3-1-1. In FIG. 15, it is assumed that sl18 (slot18) is set as the SRS transmission cycle and slot20 is set as the CSI transmission cycle. The UE selects s140 so that the SRS transmission cycle is a predetermined ratio (for example, 7 times) to the CSI-RS transmission cycle.

Based on the period of CSI-RS resources for coordination between DL and UL (T _CSI-RS ), the UE determines a new period of SRS resources for coordination between DL and UL (T _{srs_new} ), for example, as follows. It is determined as in equation (1).
T _{srs_new} =N*T _CSI-RS *2 ^{(μUL BWP SCS－μDL BWP SCS)} (1)

FIG. 16 is a diagram showing an example of the transmission timing of CSI-RS and SRS when the predetermined ratio N=1. UL and DL are controlled so that μ _{UL BWP SCS} − _{μ DL BWP SCS} =0. In FIG. 16, it is assumed that the ratio of the CSI-RS cycle (T _CSI-RS ) to the SRS cycle (T _{SRS_old} ) is not N=1 at the time of RRC setting. Then, the UE changes the SRS cycle to T _{SRS_NEW} so that N=1 in response to an alignment indicator from the DCI, and transmits it at the same timing as the CSI-RS.

FIG. 17 is a diagram showing an example of the transmission timing of the CSI-RS and SRS when the predetermined ratio N=1/2. UL and DL are controlled so that μ _{UL BWP SCS} − _{μ DL BWP SCS} =0. In FIG. 17, it is assumed that at the time of RRC setting, the ratio of the CSI-RS cycle (T _CSI-RS ) to the SRS cycle (T _{SRS_old} ) is not N=1/2. Then, the UE receives an SRS cycle change instruction (T _{SRS_NEW} ) such that N=1/2 in the adjustment instruction (Align Indicator) by the DCI. Thereafter, the UE changes the SRS period to T _{SRS_NEW} and transmits it at the same timing as the CSI-RS in one of the two SRS transmissions.

FIG. 18 is a diagram showing an example of the transmission timing of CSI-RS and SRS when the predetermined ratio N=2. UL and DL are controlled so that μ _{UL BWP SCS} − _{μ DL BWP SCS} =0. In FIG. 18, it is assumed that the ratio of the CSI-RS cycle (T _CSI-RS ) to the SRS cycle (T _{SRS_old} ) is not N=2 at the time of RRC setting. Then, the UE receives an SRS cycle change instruction (T _{SRS_NEW} ) such that N=2 in the adjustment instruction (Align Indicator) by the DCI. Thereafter, the UE changes the SRS period to T _{SRS_NEW} and transmits the SRS at the same timing as one of the two CSI-RS transmissions.

《Embodiment 3-1-2》
The UE adjusts the offset of the transmission of SRS resources or SRS resource sets for coordination between DL and UL to a new value (eg, a constant value) based on the adjusted period (T _{srs_new} ). Hereinafter, the offset of transmission of SRS resources or SRS resource sets for adjustment between DL and UL may be simply referred to as offset.

《《Option 1》》
The UE may determine the offset using a function of the adjusted period (T _{srs_new} ) and the original offset (T _{offset_old} ) of the SRS resource or SRS resource set for coordination between DL and UL. The function may be defined in the specification or may be instructed by physical layer signaling/upper layer signaling.

A specific example of option 1 of embodiment 3-1-2 will be described. The UE determines the offset of transmission of the SRS resource or SRS resource set for coordination between DL and UL based on equation (2) below (function of T _{offset_old} and T _{srs_new} ).
T _{offset_new} =T _{offset_old} mod (T _{srs_new} ) (2)

FIG. 19 is a diagram showing an example of option 1 of embodiment 3-1-2. UL and DL are controlled so that μ _{UL BWP SCS} − _{μ DL BWP SCS} =0. In the example of FIG. 19, the period before SRS update (T _{srs_old} ) is 5, the offset before SRS update (T _{offset_old} ) is 4, and the period after SRS update (T _{srs_new} ) is 4. do. The SRS cycle is updated, for example, by the method of Embodiment 3-1-1. The UE determines the updated offset (T _{offset_new} ) of the SRS to be 0 based on the above equation (2), and transmits the SRS using the new period (T _{srs_new} ) and the new offset (T _{offset_new} ).

《《Option 2》》
Alternatively, the UE may determine the offset based on a value defined in the specifications, or may set it by RRC/MAC CE/DCI. The offset may be from 0 to T _{srs_new} −1.

《《Option 3》》
Alternatively, the UE may select/determine the offset (not set/instructed by the base station) and send it (feedback) to the base station using the UL signal (eg as a UE capability). The offset may be from 0 to T _{srs_new} −1.

FIG. 20 is a diagram showing examples of

options

2 and 3 of embodiment 3-1-2. Assume that the example in FIG. 20 is an example using either option 2 or option 3. UL and DL are controlled so that μ _{UL BWP SCS} − _{μ DL BWP SCS} =0. In the example of FIG. 20, there is an example (new1) in which the period after SRS update (T _{srs_new} ) is 4 and the offset after SRS update (T _{offset_new} ) is 0, and the period after SRS update (T _{srs_new} ) is 0. 4 and the offset after SRS update (T _{offset_new} ) is 3 (new2). The UE transmits the SRS using a new period (T _{srs_new} ) and a new offset (T _{offset_new} ). However, in the example of new2, the CSI-RS transmission timing and the SRS transmission timing do not match.

If the SRS resource based on the offset determined in option 1/2/3 of this embodiment is a resource that is not used for CSI-RS reception or SRS transmission, the UE CSI-RS reception/SRS transmission may be performed using UL symbols (slots). The valid DL symbol/UL symbol may be a symbol set as DL/UL/flexible by an upper layer signal. A valid DL symbol/UL symbol may be a symbol that does not correspond to a symbol for a set measurement gap.

According to this embodiment, by adjusting the period/offset of SRS transmission and matching the SRS transmission timing with the CSI-RS reception timing (same or adjacent timing), the SRS can be used to perform DL CSI with high precision. Estimation can be carried out.

[Embodiment 3-2]
The UE adjusts the DL and UL based on the SRS resource/SRS resource set (for example, the SRS resource/SRS resource set configured/instructed or selected by the method of the second embodiment) for coordination between the DL and the UL. For DL CSI estimation of CSI-RS resources/CSI-RS resource sets (for example, CSI-RS resources/CSI-RS resource sets set/instructed or selected by the method of the first embodiment) for coordination between Adjust/select/determine receive antenna port.

FIG. 21 is a diagram showing an example of the antenna port of the UE. As shown in FIG. 21, the antenna ports (0-3) of the UE are used for transmission and reception. If the use of SRS resources is antenna switching, the antennas may be switched.

Note that the UE may report UE capability information (for example, RRC parameter "supportedSRS-TxPortSwitch") indicating the SRS transmission port switching pattern that it supports to the network. This pattern is expressed in the form of "txry" such as "t1r2", "t2r4", etc., and it means that SRS transmission can be performed using x antenna ports out of a total of y antennas (denoted as xTyR). may also mean Here, y may correspond to all or a subset of the UE's receive antennas.

The UE determines a receiving antenna port pattern for DL CSI estimation according to Embodiment 3-2-1 or Embodiment 3-2-2 below. The UE may transmit the UE antenna port of Embodiment 3-2-1 and the UE antenna port index of Embodiment 3-2-1 as UE capability information.

《Embodiment 3-2-1》
The UE uses the UE antenna port associated with the SRS resource/SRS resource set (SRS-ResourceID/SRS-ResourceSetID) for coordination between DL and UL as the CSI-RS resource/CSI-RS resource for DL CSI estimation. It may be determined to be the antenna port for set reception (FIG. 22).

《Embodiment 3-2-2》
CSI-RS resource/CSI-RS resource set reception for DL CSI estimation to determine the UE antenna port (SRS antenna port, which is assigned an antenna port index) associated with a specific SRS resource for coordination between DL and UL. (FIG. 23).

《Pattern Index》
A pattern index indicating a pattern of receive antenna ports may be configured in the UE by the base station, or may be selected and reported by the UE. For example, different sets of antenna ports linked for each pattern index may be set from the base station to the UE by RRC/MAC CE/DCI. Alternatively, the UE may select a pattern index to antenna port mapping and use the UL signal to report the receive antenna port corresponding to that value.

According to this embodiment, in receiving CSI-RS resources/CSI-RS resource sets for DL CSI estimation, the antenna port corresponding to the antenna port for SRS transmission is used, so DL CSI estimation can be performed with high accuracy.

[Embodiment 3-3]
The UE may adjust (determine/select) a receiving antenna port for PDSCH/PDCCH reception based on one or more CSI-RS resources or CSI-RS resource sets for coordination between DL and UL. .

The UE uses the reception antenna port for PDSCH/PDCCH reception as one or more CSI-RS resources or CSI-RS resource set DL CSI estimation for adjustment between DL and UL, which has a QCL relationship with the PDSCH/PDCCH. The antenna port may be determined (determined/selected) to be the same as the antenna port (determined in Embodiment 3-2, for example).

According to this embodiment, for DL CSI estimation, the antenna port corresponding to the antenna port for SRS transmission is used also for PDSCH/PDCCH reception, so it is possible to perform DL CSI estimation with high accuracy.

<Supplement>
At least one of the embodiments described above may apply only to UEs that have reported or support a particular UE capability.

The particular UE capability may indicate at least one of the following:
- Supporting specific processing/operation/control/information for at least one of the above embodiments.
- Support coordination between DL and UL.
- Support each embodiment/option's processing/operation/control/information, or a combination thereof.

Further, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (for example, cell, band, BWP). , capability for each frequency range (for example, Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or for each subcarrier spacing (SCS). It may be the ability of

Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all duplex schemes (commonly regardless of the duplex scheme), or may be a capability that is applied across all duplex schemes (for example, Time Division Duplex). The capability may be for each frequency division duplex (TDD)) or frequency division duplex (FDD)).

Also, at least one of the embodiments described above may be applied when the UE is configured with specific information related to the embodiment described above by upper layer signaling.

If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, for example, Rel. 15/16 operations may be applied.

(Additional note)
Regarding one embodiment of the present disclosure, the following invention will be added.
[Additional note 1]
a first configuration of one or more channel state information reference signal (CSI-RS) resources or one or more CSI-RS resource sets for coordination between downlink (DL) and uplink (UL); a receiving unit that receives a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for inter-UL coordination;
A control unit that controls at least one of a cycle between DL and UL, an offset, and an antenna port based on the first setting and the second setting.
[Additional note 2]
The terminal according to supplementary note 1, wherein the control unit adjusts a cycle of the measurement reference signal (SRS) resource or the SRS resource set based on a cycle of the CSI-RS resource or the CSI-RS resource set.
[Additional note 3]
The terminal according to supplementary note 2, wherein the control unit adjusts the offset of the SRS resource or the SRS resource set based on the adjusted period of the SRS resource or the SRS resource set.
[Additional note 4]
The control unit determines a receiving antenna port for DL CSI estimation of the CSI-RS resource or the CSI-RS resource set based on the SRS resource or the SRS resource set. The device listed.

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

FIG. 24 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .

Additionally, the wireless communication system 1 (which may be simply referred to as system 1) provides dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs). May be supported. MR-DC has dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)).

In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (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 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)). )) may be supported.

The wireless communication system 1 includes a base station 11 that forms a macro cell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. You may prepare. User terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of 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 FR1 may correspond to a higher frequency band than FR2, for example.

Further, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by wire (for example, optical fiber, X2 interface, etc. compliant with Common Public Radio Interface (CPRI)) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is an upper station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a 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 Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.

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

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

In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method 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.

A wireless access method may also be called a waveform. Note that in the wireless communication system 1, other wireless access methods (for example, other single carrier transmission methods, other multicarrier transmission methods) may be used as the UL and DL radio access methods.

In the wireless communication system 1, the downlink channels include a physical downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (physical broadcast channel (PBCH)), and a downlink control channel (physical downlink control). Channel (PDCCH)) or the like may be used.

In the wireless communication system 1, uplink channels include a physical uplink shared channel (PUSCH) shared by each user terminal 20, an uplink control channel (PUCCH), and a random access channel. (Physical Random Access Channel (PRACH)) or the like may be used.

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

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

Note that the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Note that PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

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

One 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 "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure may be read interchangeably.

The PUCCH allows channel state information (CSI), delivery confirmation information (for example, may be called Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and scheduling request ( Uplink Control Information (UCI) including at least one of SR)) may be transmitted. A random access preamble for establishing a connection with a cell may be transmitted by PRACH.

Note that in this disclosure, downlinks, uplinks, etc. may be expressed without adding "link". Furthermore, various channels may be expressed without adding "Physical" at the beginning.

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), Positioning Reference Signal (PRS), 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 SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

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

(base station)
FIG. 25 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.

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

The control unit 110 controls the entire base station 10. The control unit 110 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

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

The transmitting/receiving section 120 may include a baseband section 121, a radio frequency (RF) section 122, and a measuring section 123. The baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212. The transmitter/receiver unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter/receiver circuit, etc., which are explained based on common understanding in the technical field related to the present disclosure. be able to.

The transmitting/receiving section 120 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 1211 and an RF section 122. The reception section may include a reception processing section 1212, an RF section 122, and a measurement section 123.

The transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

The transmitter/receiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.

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

The transmitting/receiving unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, and discrete Fourier transform (DFT) on the bit string to be transmitted. A baseband signal may be output by performing transmission processing such as processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion.

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

On the other hand, the transmitting/receiving section 120 (RF section 122) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.

The transmitting/receiving unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) processing (if necessary), applying reception processing such as filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, User data etc. may also be acquired.

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

The transmission path interface 140 transmits and receives signals (backhaul signaling) between devices included in the core network 30 (for example, network nodes providing NF), other base stations 10, etc., and provides information for the user terminal 20. User data (user plane data), control plane data, etc. may be acquired and transmitted.

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

Note that the transmitter/receiver 120 uses one or more channel state information reference signal (CSI-RS) resources or the first of one or more CSI-RS resource sets for adjustment between downlink (DL) and uplink (UL). and a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for coordination between the DL and UL.

When at least one of the period, offset, and antenna port between the DL and UL is controlled based on the first setting and the second setting, the control unit 110 estimates the CSI of the DL based on the SRS. You may.

(user terminal)
FIG. 26 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception using the transmitting/receiving unit 220 and the transmitting/receiving antenna 230, measurement, and the like. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 220.

The transmitting/receiving section 220 may include a baseband section 221, an RF section 222, and a measuring section 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field related to the present disclosure.

The transmitting/receiving section 220 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 2211 and an RF section 222. The reception section may include a reception processing section 2212, an RF section 222, and a measurement section 223.

The transmitting/receiving antenna 230 can be configured from an antenna, such as an array antenna, as described based on common recognition in the technical field related to the present disclosure.

The transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

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

The transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (e.g. RLC retransmission control), MAC layer processing (e.g. , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmitting/receiving unit 220 (transmission processing unit 2211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, DFT processing (as necessary), and IFFT processing on the bit string to be transmitted. , precoding, digital-to-analog conversion, etc., and output a baseband signal.

Note that 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 (for example, PUSCH), the transmitting/receiving unit 220 (transmission processing unit 2211) performs the above processing in order to transmit the channel using the DFT-s-OFDM waveform. DFT processing may be performed as the transmission processing, or if not, DFT processing may not be performed as the transmission processing.

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

On the other hand, the transmitting/receiving section 220 (RF section 222) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.

The transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, and decoding (error correction) on the acquired baseband signal. (which may include decoding), MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to obtain user data and the like.

The transmitting/receiving unit 220 (measuring unit 223) may perform measurements regarding the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement results may be output to the control unit 210.

Note that the transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

Note that the transmitter/receiver 220 uses one or more channel state information reference signal (CSI-RS) resources or the first of one or more CSI-RS resource sets for adjustment between downlink (DL) and uplink (UL). and a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for coordination between the DL and UL.

The control unit 210 may control at least one of the period, offset, and antenna port between the DL and UL based on the first setting and the second setting.

The control unit 210 may adjust the cycle of the measurement reference signal (SRS) resource or the SRS resource set based on the cycle of the CSI-RS resource or the CSI-RS resource set. The control unit 210 may adjust the offset of the SRS resource or the SRS resource set based on the adjusted period of the SRS resource or the SRS resource set.

The control unit 210 may determine a receiving antenna port for DL CSI estimation of the CSI-RS resource or the CSI-RS resource set based on the SRS resource or the SRS resource set.

(Hardware configuration)
It should be noted that the block diagram used to explain the above embodiment shows blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices. The functional block may be realized by combining software with the one device or the plurality of devices.

Here, functions include judgment, decision, judgement, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and consideration. , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (configuration unit) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 27 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above 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. .

Note that in this disclosure, words such as apparatus, circuit, device, section, unit, etc. can be read interchangeably. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.

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

Each function in the base station 10 and the user terminal 20 is performed by, for example, loading predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations and communicates via the communication device 1004. This is achieved by controlling at least one of reading and writing data in the memory 1002 and storage 1003.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic unit, registers, and the like. For example, at least a portion of the above-mentioned control unit 110 (210), transmitting/receiving unit 120 (220), etc. may be realized by the processor 1001.

Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes in accordance with these. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks may also be realized in the same way.

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

The storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc., for example. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be configured to include. For example, the above-described transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004. The transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

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

The base station 10 and user terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.

(Modified example)
Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal may be interchanged. Also, the signal may be a message. The reference signal may also be abbreviated as RS, and may be called a pilot, pilot signal, etc. depending on the applicable standard. Further, a component carrier (CC) may 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 (eg, 1 ms) that does not depend on numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, and radio frame structure. , 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 be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a slot may be a time unit based on numerology.

A slot may include multiple mini-slots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.

For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be. 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 minimum time unit for scheduling in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the 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 that is shorter than the normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that long TTI (for example, normal TTI, subframe, etc.) may be read as TTI with a time length exceeding 1 ms, and short TTI (for example, short TTI, etc.) It may also be read as a TTI having the above TTI length.

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

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

Note that one or more RBs include a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, and an RB. They may also be called pairs.

Additionally, a resource block may be configured by one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (also called partial bandwidth, etc.) refers to a subset of consecutive common resource blocks (RB) for a certain numerology in a certain carrier. Good too. Here, the common RB may be specified by an RB index based on a common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

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

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 of the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

Note that the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above 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 symbols included in an RB, The number of subcarriers, the number of symbols within a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

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

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

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

Additionally, information, signals, etc. may be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layer. Information, signals, etc. may be input and output via multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Information, signals, etc. that are input and output can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

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 physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper 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 thereof It may be carried out by

Note that the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Further, RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like. Further, MAC signaling may be notified using, for example, a MAC Control Element (CE).

Further, notification of prescribed information (for example, notification of "X") is not limited to explicit notification, but may be made implicitly (for example, by not notifying the prescribed information or by providing other information) (by notification).

The determination may be made by a value expressed by 1 bit (0 or 1), or by a boolean value expressed by true or false. , may be performed by numerical comparison (for example, comparison with a predetermined value).

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, information, etc. may be sent and received via a transmission medium. For example, if the software uses wired technology (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (such as infrared, microwave, etc.) to , a server, or other remote source, these wired and/or wireless technologies are included within the definition of a transmission medium.

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

In this disclosure, "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "Transmission Configuration Indication state (TCI state)", "space "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" are interchangeable. can be used.

In the present disclosure, "Base Station (BS)", "Wireless base station", "Fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel" , "cell," "sector," "cell group," "carrier," "component carrier," and the like may be used interchangeably. A base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is connected to a base station subsystem (e.g., an indoor small base station (Remote Radio Communication services can also be provided by the Head (RRH)). The term "cell" or "sector" refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.

In the present disclosure, a base station transmitting information to a terminal may be interchanged with 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" are used interchangeably. can be done.

A mobile station is 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 a base station and a mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, or the like.

The moving body refers to a movable object, and the moving speed is arbitrary, and naturally includes cases where the moving body is stopped. The mobile objects include, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships (ships and other watercraft). , including, but not limited to, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and items mounted thereon. Furthermore, the mobile object may be a mobile object that autonomously travels based on a travel command.

The moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ). Note that at least one of the base station and the mobile station includes 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. 28 is a diagram illustrating 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 (current sensor 50, (including a rotation speed 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 section 59, and a communication module 60. Be prepared.

The drive unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor. The steering unit 42 includes at least a steering wheel (also referred to as a steering wheel), 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 includes a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input/output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control section 49 may be called an electronic control unit (ECU).

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

The information service department 59 includes various devices such as car navigation systems, audio systems, speakers, displays, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and these devices. It consists of one or more ECUs that control the The information service unit 59 provides various information/services (for example, multimedia information/multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60 or the like.

The information service unit 59 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, and an output device that performs output to the outside (for example, display, speaker, LED lamp, touch panel, etc.).

The driving support system unit 64 includes millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (for example, Global Navigation Satellite System (GNSS), etc.), and map information (for example, High Definition (HD)). maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMUs), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial Intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving burden, as well as one or more devices that control these devices. It consists of an ECU. Further, the driving support system section 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic 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 communicates via the communication port 63 with 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, which are included in the vehicle 40. Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.

The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, various information is transmitted and received with an 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 base station 10, user terminal 20, etc. described above. Further, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (it may function as at least one of the base station 10 and the user terminal 20).

The communication module 60 receives signals from the various sensors 50 to 58 described above that are input to the electronic control unit 49, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 59. At least one of the information based on the information may be transmitted to an external device via wireless communication. The electronic control unit 49, various sensors 50-58, information service unit 59, etc. may be called an input unit that receives 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, inter-vehicle information, etc.) transmitted from an external device, and displays it on the information service section 59 provided in the vehicle. The information service unit 59 is an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60). may be called.

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

Additionally, the base station in the present disclosure may be replaced by a user terminal. For example, communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the functions that the base station 10 described above has. Further, words such as "uplink" and "downlink" may be replaced with words corresponding to inter-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may be replaced with sidelink channels.

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

In this disclosure, the operations performed by the base station may be performed by its upper node in some cases. In a network that includes one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g. It is clear that this can be performed by a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc. (though not limited thereto), or a combination thereof.

Each aspect/embodiment described in this disclosure may be used alone, in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps 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 an integer or decimal number, for example)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications ), 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. The present invention may be applied to systems to be used, next-generation systems expanded, modified, created, or defined based on these systems. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

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

As used in this disclosure, any reference to elements using the designations "first," "second," etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, 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 any way.

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

In addition, "judgment (decision)" includes receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), access ( may be considered to be "determining", such as accessing data in memory (eg, accessing data in memory).

In addition, "judgment" is considered to mean "judging" resolving, selecting, choosing, establishing, comparing, etc. Good too. In other words, "judgment (decision)" may be considered to be "judgment (decision)" of some action.

Furthermore, "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

The "maximum transmit power" described in this disclosure may mean the maximum value of transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the It may also mean rated UE maximum transmit power).

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

In this disclosure, when two elements are connected, they may be connected using one or more electrical wires, cables, printed electrical connections, etc., as well as in the radio frequency domain, microwave can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the light (both visible and invisible) range.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted similarly to "different."

Where "include", "including" and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising". It is intended that Furthermore, the term "or" as used in this disclosure is not intended to be exclusive or.

In this disclosure, when articles are added by translation, such as a, an, and the in English, the present disclosure may include that the nouns following these articles are plural.

In the present disclosure, "less than or equal to", "less than", "more than", "more than", "equal to", etc. may be read interchangeably. In addition, in this disclosure, "good", "bad", "large", "small", "high", "low", "early", "slow", "wide", "narrow", etc. The words are not limited to the original, comparative, and superlative, and may be interpreted interchangeably. In addition, in this disclosure, words meaning "good", "bad", "large", "small", "high", "low", "early", "slow", "wide", "narrow", etc. may be interpreted as an expression with "the i-th" (i is any integer), not only in the elementary, comparative, and superlative, but also interchangeably (for example, "the highest" can be interpreted as "the i-th highest"). may be read interchangeably).

In this disclosure, "of", "for", "regarding", "related to", "associated with", etc. are used to refer to each other. It may be read differently.

Although the invention according to the present disclosure has been described in detail above, it is clear for those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention as determined based on the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and does not have any limiting meaning on the invention according to the present disclosure.

Claims

a first configuration of one or more channel state information reference signal (CSI-RS) resources or one or more CSI-RS resource sets for coordination between downlink (DL) and uplink (UL); a receiving unit that receives a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for inter-UL coordination;
a control unit that controls at least one of a cycle between DL and UL, an offset, and an antenna port based on the first setting and the second setting;
A terminal with
The terminal according to claim 1, wherein the control unit adjusts a cycle of the measurement reference signal (SRS) resource or the SRS resource set based on a cycle of the CSI-RS resource or the CSI-RS resource set.
The terminal according to claim 2, wherein the control unit adjusts the offset of the SRS resource or the SRS resource set based on the adjusted period of the SRS resource or the SRS resource set.
The terminal according to claim 1, wherein the control unit determines a receiving antenna port for DL CSI estimation of the CSI-RS resource or the CSI-RS resource set based on the SRS resource or the SRS resource set.
a first configuration of one or more channel state information reference signal (CSI-RS) resources or one or more CSI-RS resource sets for coordination between downlink (DL) and uplink (UL); receiving a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for inter-UL coordination;
controlling at least one of a period, an offset, and an antenna port between the DL and UL based on the first setting and the second setting;
A wireless communication method for a terminal having
a first configuration of one or more channel state information reference signal (CSI-RS) resources or one or more CSI-RS resource sets for coordination between downlink (DL) and uplink (UL); a transmitting unit that transmits a second configuration of one or more measurement reference signal (SRS) resources or one or more SRS resource sets for coordination between ULs;
a control unit that estimates DL CSI based on the SRS when at least one of the period, offset, and antenna port between the DL and UL is controlled based on the first setting and the second setting; Base station with.