WO2020166085A1

WO2020166085A1 - User terminal and wireless communication method

Info

Publication number: WO2020166085A1
Application number: PCT/JP2019/005702
Authority: WO
Inventors: 真哉岡村; 祐輝松村; 浩樹原田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2020-08-20

Abstract

A user terminal according to an aspect of the present disclosure comprises a transmission unit that transmits information indicating the correspondence between an index of a downlink reference signal and a panel and a control unit that determines, on the basis of the correspondence, a panel used for transmitting an uplink signal.

Description

User terminal and wireless communication method

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

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

A successor system to LTE (for example, 5th generation mobile communication system (5G), 5G+(plus), New Radio (NR), 3GPP Rel. 15 or later) is also under consideration.

In the existing LTE system (for example, LTE Rel.8-14), the user terminal (UE: User Equipment) transmits an upstream signal. The uplink signal includes, for example, a random access channel (Physical Random Access Channel (PRACH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), and a sounding reference signal (Sounding). It may include at least one of Reference Signal (SRS), PUSCH or PUCCH demodulation reference signal (Demodulation Reference Signal (DM-RS)).

In the future wireless communication system (hereinafter, also referred to as NR), it is considered that the UE performs beam management (Beam Management (BM)). Specifically, a node determines the beam correspondence (BC) that determines the transmission beam (transmission spatial domain filter) used for signal transmission based on the reception beam (reception spatial domain filter) used for signal reception. ) Using BM is also considered.

For example, in the BC-based (with BC) uplink transmission, the UE transmits the uplink signal transmission beam (based on the downlink reference signal (eg, synchronization signal block (SSB) or channel state information reference signal (CSI-RS))). It is under consideration to determine the transmit spatial domain filter). On the other hand, in non-BC-based (no BC) uplink transmission, it is considered that the UE determines a transmission beam (transmission spatial domain filter) of the uplink signal based on the uplink reference signal (eg, SRS).

Also, in NR, it is considered that the UE performs uplink transmission using multiple panels (UE panel, antenna panel, beam). However, the UE may not be able to properly recognize which panel corresponds to the receive beam or the transmit beam, and as a result, may not be able to appropriately perform control regarding the panel (for example, turning on or off the power of the panel).

Therefore, one of the purposes of the present disclosure is to provide a user terminal and a wireless communication method to appropriately control a panel.

A user terminal according to an aspect of the present disclosure determines a panel used for transmitting an uplink signal based on a transmission unit that transmits an index of a downlink reference signal and information indicating a correspondence relation between the panel and the correspondence relation. And a control unit.

According to one aspect of the present disclosure, it is possible to appropriately perform control regarding a panel.

1A to 1C are diagrams showing an example of an upstream BM. 2A and 2B are diagrams showing an example of a multi-panel. FIG. 3 is a diagram illustrating an example of a panel information reporting procedure according to the first aspect. 4A and 4B are diagrams illustrating an example of beam report information according to the first example. 5A and 5B are diagrams illustrating an example of first BC-based uplink transmission according to the second aspect. 6A to 6D are diagrams showing an example of second BC-based uplink transmission according to the second mode. 7A to 7C are diagrams showing an example of first non-BC-based uplink transmission according to the second mode. 8A and 8B are diagrams illustrating an example of second non-BC-based uplink transmission according to the second aspect. FIG. 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 10 is a diagram illustrating an example of the configuration of the base station according to the embodiment. FIG. 11 is a diagram illustrating an example of the configuration of the user terminal according to the embodiment. FIG. 12 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.

(Beam management)
In NR, beam management (Beam Management (BM)) is under study. Specifically, in NR, a BM that does not assume to have beam correspondence (BC) (also referred to as a first BM, a BM without (wo) BC, a BM that is not BC-based, and the like) and a beam correspondence are included. Then, the BM assumed (also referred to as the second BM, BM with (w) BC, BC-based BM, etc.) is being studied.

Here, the beam correspondence means, for example, a certain node (for example, a base station or a UE) determines a beam (reception beam, Rx beam) to be used for receiving a signal, and based on the determined Rx beam, the signal It may be the ability to determine the beam (transmission beam, transmission beam) used for transmission.

In a BM that is not BC-based, a receiving device (Rx device) (for example, a base station in the uplink and a UE in the downlink) uses one or more signals from a transmitting device (Tx device) (for example, a UE in the uplink and a base station in the downlink). (For example, based on the measurement result of the uplink reference signal or the downlink reference signal), determine the transmission beam used for transmission from the transmission device, and transmit information indicating the transmission beam (for example, beam index) to the transmission device. To do. The transmission device may transmit a signal (for example, an upstream signal or a downstream signal) using the transmission beam instructed by the reception device.

On the other hand, in the BC-based BM, a transmission device (Tx device) (for example, UE in uplink, base station in downlink) is a signal from a reception device (Rx device) (for example, base station in uplink, UE in downlink) ( For example, a transmission beam may be determined based on a downlink reference signal or an uplink reference signal, and a signal (for example, an uplink signal or a downlink signal) may be transmitted using the determined transmission beam.

In addition, the beam correspondence is the transmit/receive beam correspondence (Tx/Rx beam correspondance), beam reciprocity (beam reciprocity), beam calibration (beam calibration), calibrated/non-calibrated (Calibrated/Non-calibrated), reciprocity. It may be referred to as calibrated/non-calibrated (reciprocity calibrated/non-calibrated), correspondence, or agreement.

1A and 1B are diagrams showing an example of an upstream BM. In FIG. 1A, an example of an uplink BM that is not BC-based is shown. In FIG. 1B, an example of a BC-based upstream BM is shown. 1A and 1B, the base station uses the beams B21 to B24 to transmit the downlink signal or receives the uplink signal, and the UE uses the beams b1 to b4 to receive the downlink signal or transmit the uplink signal. (See FIG. 1C). However, the transmission beam and the reception beam do not always match in each node. Further, in FIG. 1C, the beam B22 and the beam b2 are assumed to be beam pair links (Beam Pair Link (BPL)).

As shown in FIG. 1A, in a BM that is not BC-based, the UE (Tx) uses one or more beams (for example, beams B21 to B24 in FIG. 1C) and an uplink reference signal (for example, a sounding reference signal (Sounding)). Reference Signal (SRS)). The UE may transmit one or more beams in different time domains using beam sweep.

For example, the UE receives information indicating one or more SRS resources (SRS resources) (for example, SRS resource ID (SRS Resource Indicator (SRI)) or list of SRS resource IDs) and corresponds to the SRS resource. An upstream signal (for example, at least one of upstream channels such as SRS, PUSCH, PUCCH, and other upstream physical signals) may be transmitted using a beam.

The base station (Rx) determines a transmission beam (for example, beam b2 in FIG. 1C) to be used for transmission from the UE (Tx) based on the measurement result of the received reference signal (for example, SRS), and performs the transmission. Information indicating the SRS resource corresponding to the beam (eg, SRS resource ID, SRI) may be transmitted to the UE.

The UE uses the transmission beam (for example, beam b2 in FIG. 1C) corresponding to the SRS resource instructed by the base station to transmit an uplink signal (for example, at least one of PRACH, PUSCH, PUCCH, SRS, and DM-RS). May be sent.

As described above, in the BM that is not the BC base, the base station transmits the transmission beam from the UE based on the measurement result using one or more resources for uplink reference signals (for example, SRS resources in uplink) set in the UE. May be determined and instructed to the UE. This allows the UE to transmit the uplink signal using an appropriate transmission beam.

On the other hand, as shown in FIG. 1B, in the BC-based BM, based on the downlink reference signal received (or detected) by the UE without measurement of the uplink reference signal (for example, SRS) in the base station (Rx), The transmit beam of the UE may be determined.

Specifically, in FIG. 1B, the base station beforehand informs the UE of the information item of the SRS configuration information (SRS configuration information, for example, radio resource control (RRC)). IE) "SRS-Config") may be sent. The SRS configuration information may include information regarding one or more SRS resources. The SRS configuration information may include information about one or more sets (SRS resource sets) each including information about one or more SRS resources.

The information on the SRS resource includes, for example, the SRI, the number of ports of the SRS resource (for example, 1, 2 or 4), the position of the time domain and the frequency domain of the SRS resource (for example, the number of symbols, the start symbol, etc.), the SRS resource. (Eg, aperiodic, semi-persistent or periodic), spatial relationship information of the SRS resource (eg, RRC IE “spatialRelationInfo” or “SRS-SpatialRelationInfo”), and the like.

Here, the spatial relationship information may indicate a spatial relationship between the SRS mapped to the SRS resource and a reference signal (reference RS (Reference RS)). The reference RS is, for example, at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information-Reference Signal (CSI-RS)), and at least one of these. May be expanded or modified.

-The SSB is a block including at least one of a synchronization signal (Synchronization Signal (SS)) and a broadcast channel (Physical Broadcast Channel (PBCH)), and is also called an SS/PBCH block or the like. The synchronization signal may include at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).

For example, the spatial relationship information may be information related to SSB (eg, SSB index) or information related to CSI-RS (eg, CSI-RS index or non-zero power), depending on the type of the reference RS having a spatial relationship with the SRS. CSI-RS resource ID) or information about SRS (for example, SRS resource ID and ID of upstream bandwidth part (Bandwidth Part (BWP))) may be included (may be shown). The spatial relationship information indicating SSB or CSI-RS may indicate BC base, and the spatial relationship information indicating SRS may indicate not BC base.

Here, the spatial relationship may be paraphrased as a pseudo collocation (QCL: Quasi-Co-Location) relationship (QCL relationship). QCL is an index indicating the statistical property of at least one of a signal and a channel (signal/channel). Further, this information may be notified from the NW as a transmission configuration indication (Transmission Configuration Indication or Transmission Configuration information (TCI)) or a TCI state (TCI state).

For example, when a certain signal/channel and another signal/channel have a QCL relationship, Doppler shift, Doppler spread, average delay (average delay) between these different signals/channels. ), delay spread, and spatial parameter (Spatial parameter) (for example, spatial reception parameter (Spatial Rx Parameter)) are the same (meaning that at least one of them is QCL). You may.

A plurality of types (QCL types) may be defined as the QCL. For example, four QCL types AD having different parameters (or parameter sets) that can be assumed to be the same may be provided, and the parameters will be described below.
-QCL type A: Doppler shift, Doppler spread, average delay and delay spread-QCL type B: Doppler shift and Doppler spread-QCL type C: Average delay and Doppler shift-QCL type D: Spatial reception parameter

In FIG. 1B, the UE determines the reception beam of the SSB or CSI-RS and uses the transmission beam corresponding to the reception beam (for example, the same beam b2 as the reception beam of SSB or CSI-RS in FIG. 1C). And may transmit an uplink signal (for example, at least one of PRACH, PUSCH, PUCCH, SRS, and DMRS).

Specifically, the UE determines to use the transmission beam corresponding to the SRS resource whose spatial relationship with the received or detected DL-RS is indicated by the above-mentioned spatial relationship information for the transmission of the uplink signal. Good.

The UE uses the same spatial domain filter as the spatial domain filter for receiving the SSB or CSI-RS when the spatial relation information regarding the SSB or CSI-RS and the SRS is set for a certain SRS resource. The SRS resource may be transmitted. That is, in this case, the UE may assume or expect that the UE receive beam of SSB or CSI-RS and the UE transmit beam of SRS are the same.

Note that the spatial domain filter for transmission of the base station, the downlink spatial domain transmission filter, and the transmission beam of the base station may be read as each other. The spatial domain filter for reception of the base station, the uplink spatial domain receive filter, and the reception beam of the base station may be read as each other.

Also, the spatial domain filter for transmission of the UE, the uplink spatial domain transmission filter, and the transmission beam of the UE may be read as each other. The spatial domain filter for reception of the UE, the downlink spatial domain receive filter, and the reception beam of the UE may be replaced with each other.

As described above, in the BC-based uplink BM, the UE can determine the spatial domain filter to be applied to the uplink signal based on the downlink reference signal (CSI-RS or SSB) indicated by the spatial relationship information.

(Multi-panel)
By the way, in NR, it is considered that the UE uses a plurality of panels (multi-panel). Each panel may be composed of a plurality of antenna elements (simply referred to as elements). For example, in large-scale MIMO (Massive MIMO (Multiple Input Multiple Output)), a super multi-element antenna may be used for each panel.

A beam (antenna directivity) can be formed by controlling at least one of the amplitude and phase (amplitude/phase) of the signal transmitted or received (transmitted/received) from each antenna element of each panel. The panel may be called an antenna panel, an antenna port group, an uplink transmission entity, a TXRU (Transceiver Unit) configuration, or the like.

2A and 2B are diagrams showing an example of a multi-panel. 2A and 2B show an example in which the UE implements two panels #0 and #1. However, the number of panels implemented by the UE is not limited to 2 and may be 3 or more (for example, 4 or even 4). Good). Further, the positions and directions of the antenna panels in FIGS. 2A and 2B are schematic, and are not limited to those shown.

FIG. 2B shows an example of a beam formed by controlling the amplitude and/or the phase of the signal transmitted/received from each antenna element of each of the panels #0 and #1. As shown in FIG. 2B, the UE may form one or more beams per panel. The UE can improve the beam gain by controlling the transmission of the uplink signal or the reception of the downlink signal using the beam formed for each panel.

Note that the number of beams (SSB index, CSI-RS resource, or SRS resource) associated with each panel in FIG. 2B may be the same or different.

2A and 2B, if all of the plurality of panels mounted on the UE are kept on, the power consumption of the UE may increase. Therefore, it is desired to suppress an increase in power consumption of the UE by controlling the on/off of at least part of the power supplies of the plurality of panels.

However, the network (eg, base station) cannot know which beam is associated with which panel at the UE. For this reason, the network cannot instruct the UE which panel should be turned off, and as a result of the UE turning off the panel determined by itself, the beam gain may not be properly obtained.

Therefore, the present inventors enable the UE to recognize the correspondence between the beam and the panel in the UE on the network side by reporting the correspondence between the beam (the SSB index, CRI or SRI corresponding to the beam) and the panel. The idea was conceived (first aspect). In addition, it was conceived that the UE can appropriately determine the panel used for uplink transmission (second aspect).

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The configurations shown in the respective embodiments may be applied individually or in combination.

Further, in the following, “downlink reference signal indicated by spatial relation information”, “downlink reference signal determined based on spatial relation information”, “downlink reference signal identified by index (or ID) indicated by spatial relation information” , "Downlink reference signal resource identified by index (or ID) indicated by spatial relationship information", "downlink reference signal transmitted using resource identified by index (or ID) indicated by spatial relationship information", May be read interchangeably.

Also, downlink reference signals are assumed to be SSB and CSI-RS, but the present invention is not limited to this. The downlink reference signal resource is assumed to be SSB or CSI-RS resource (for example, non-zero power CSI-RS resource), but is not limited to this. Further, the index (RS index) of the downlink reference signal may be read as the index of the downlink reference signal resource.

Further, "SRS", "SRS resource", "SRS resource ID", "SRS resource specified by SRS resource ID", "SRS transmitted using SRS resource specified by SRS resource ID", etc. May be read as

The uplink signal is assumed to be, for example, at least one of PRACH, PUSCH, PUCCH, SRS, and DMRS, but is not limited to this.

Also, the panel may be read as a UE panel, an antenna panel, an antenna array, an antenna matrix, an antenna port group, an antenna element group, a DMRS port group, a code division multiplexing (CDM) group, or the like. The ID may be read as an index, a number, or the like.

Also, the SSB index may be read as an SS/PBCH block index, an SS/PBCH block resource identifier (SS/PBCH Block Resource indicator (SSBRI)), or the like.

Also, the CSI-RS index may be read as a CSI-RS resource index, a CSI-RS resource identifier (CSI-RS resource indicator (CRI)), or the like.

(First mode)
In the first aspect, the UE transmits (reports) information (panel information) indicating a correspondence (correspondence) between the index of the downlink reference signal and the panel. The index of the downlink reference signal may be, for example, an SSB index or a CSI-RS index (SSB/CSI-RS index).

FIG. 3 is a diagram showing an example of a panel information reporting procedure according to the first aspect. In step S101, the UE receives one or more downlink reference signals (eg, SSB with one or more SSB indexes or CSI-RS with one or more CSI-RS indexes). The one or more downlink reference signals may be set in the UE for beam measurement.

In step S102, the UE transmits (reports) information regarding the measurement result (beam reporting information) using the downlink reference signal received in step S101.

The beam report information may be transmitted by L1 signaling or higher layer signaling. In the case of L1 signaling, the beam report information may be included in the uplink control information (eg, Channel State Information (CSI)) transmitted on the PUCCH or PUSCH. In the case of upper layer signaling, the beam report information may be included in the measurement report transmitted by RRC signaling.

The beam report information may include, for example, a measurement result using the SSB/CSI-RS index. The measurement result may include at least one of the following.
Reference signal received power (RSRP) (for example, L1-RSRP)
-Reference signal received quality (RSRQ)
-Received signal power to interference and noise power ratio (Signal-to-Interference plus Noise power Ratio (SINR))

The beam report information includes the upper X (eg, X=1, 2 or 4) measurement results (eg, L1-RSRP) in the SSB/CSI-RS index for measurement set in the UE. But it's okay. Further, the beam report information may include SSB/CSI-RS indexes corresponding to the top X measurement results.

Also, the beam report information may include panel information corresponding to the SSB/CSI-RS index. The panel information may be an identifier (also referred to as a panel ID, a panel index, etc.) of a panel corresponding to (associated with) the SSB/CSI-RS index (for example, FIG. 4A), or the SSB/ It may be information (panel switch information) indicating whether the panel used for receiving the CSI-RS index (reception panel) is the same as the current reception panel (for example, FIG. 4B).

4A and 4B are diagrams showing an example of beam report information according to the first aspect. 4A and 4B, for example, as illustrated in FIGS. 2A and 2B, a case where the UE implements two panels #0 and #1 is illustrated as an example. However, the number of panels and beams associated with each panel are illustrated. The number (SSB index number or CSI-RS index number) and the like are not limited to those shown in the figure.

For example, in FIG. 4A, the beam report information is associated with each SSB/CSI-RS index, a measurement result using each SSB/CSI-RS index (eg, L1-RSRP), and each SSB/CSI-RS index. An example is shown including the panel IDs that are provided.

For example, in FIG. 2B, the beams corresponding to the SSB index or the CSI-RS indexes #0 to #7 and #8 to #15 are associated with the panels #0 and #1, respectively. Therefore, as shown in FIG. 4B, the beam report information includes panel IDs #0, #0, #0, and #1 respectively associated with SSB/CSI-RS indexes #2, #3, #6, and #14. You may

On the other hand, in FIG. 4B, the beam report information is associated with each SSB/CSI-RS index, a measurement result using each SSB/CSI-RS index (for example, L1-RSRP), and each SSB/CSI-RS index. An example is shown that includes the panel switch information that is provided. 4B differs from FIG. 4A in that the beam report information includes panel switch information instead of the panel ID.

In FIG. 4B, since the panel switch information associated with the SSB/CSI-RS indexes #2, #3, and #6 is “0”, the receiving panels with the SSB/CSI-RS indexes #2, #3, and #6 are displayed. It may be the same as the current receiving panel. For example, if the current receiving panel of the UE is panel #0, the panel switch information may indicate that panel #0 is associated with SSB/CSI-RS indexes #2, #3, #6.

On the other hand, since the panel switch information associated with the SSB/CSI-RS index #14 is “1”, the receiving panel of the SSB/CSI-RS index #14 may be different from the current receiving panel. For example, if the current receiving panel of the UE is panel #0, the panel switch information may indicate that panel #1 is associated with SSB/CSI-RS index #14.

As shown in FIG. 4A, when the panel ID associated with each SSB/CSI-RS index is specified, the payload increases as the number of panels installed by the UE increases. For example, as shown in FIG. 2A, when the UE implements two panels, the field size (the number of bits) for the panel ID is 1 bit. On the other hand, when the UE implements 4 panels, the field size requires 2 bits.

On the other hand, as shown in FIG. 4B, when the panel switch information associated with each SSB/CSI-RS index is specified, the field size for the panel switch information is 1 bit regardless of the number of panels mounted by the UE. Good. Therefore, in FIG. 4B, when the number of panels mounted by the UE increases, the size of the beam report information (payload, number of bits) can be suppressed compared to FIG. 4A.

Note that the number of SSB/CSI-RS indexes that can include (can report) the measurement result in the beam report information may be limited to a predetermined number. For example, the maximum number of the SSB/CSI-RS indexes may be 1, 2 or 4, for example. The maximum may be configured in the UE by higher layer parameters.

The UE may also determine which SSB/CSI-RS index measurement result is included in the beam report information based on the panel ID. Specifically, the UE may include the measurement result of the SSB/CSI-RS index associated with each panel ID in the beam report information.

For example, as shown in FIG. 2B, when the UE implements panels #0 and #1, the measurement results of a predetermined number (for example, three) of SSB/CSI-RS indexes associated with panel #0 and panel #0. A predetermined number (for example, one) of SSB/CSI-RS index measurement results associated with 1 may be included in the beam report information.

The UE may decide which panel the SSB/CSI-RS index measurement result associated with which panel is most reported by the current receiving panel. For example, the UE may report many SSB/CSI-RS index measurement results associated with the current reception panel.

Further, the beam report information may include information indicating the number of panels mounted by the UE (panel number information). By comparing the number of panel IDs associated with each SSB/CSI-RS index in the beam report information with the number of the panels, the network (eg, base station) determines that the SSB/CSI-RS index is associated with the UE. You can recognize the existence of panels that are not.

Also, the UE may previously transmit capability information (eg, UE capability) indicating whether or not to support the above-described reporting of panel information (eg, panel ID or panel switch information). The UE may transmit the panel information by including the panel information in the beam report information when the report of the panel information is triggered. In addition, the report of the panel information may be triggered by at least one of the upper layer parameter and a predetermined field value in the DCI.

Also, the UE may decide for itself whether to include the panel information in the beam report information. For example, when mounting a plurality of panels, the UE may include the panel information in the beam report information and transmit the beam report information. When the UE does not implement multiple panels (only implements a single panel or does not implement panels), it may transmit beam report information without including panel information.

As described above, according to the first aspect, since the UE reports the beam report information including the panel information to the network, the network uses the downlink reference signal index (eg, SSB/CSI-RS index) and the panel. It is possible to properly recognize the correspondence with the ID.

(Second mode)
In the second aspect, the panel ID is based on the correspondence between the downlink reference signal index (for example, SSB/CSI-RS index) indicated by the panel information and the panel, or the panel ID specified by the network (for example, base station) The control of uplink transmission based on is explained. In the second mode, the panel information is described as being a panel ID, for example, but it goes without saying that it may be the panel switch information.

<BC-based upstream transmission>
In the case of BC base (with BC), spatial related information (for example, “SRS-SpatialRelationInfo” or “PUCCH-SpatialRelationInfo” of RRC IE) set in the UE is a desired signal (target signal, for example, SRS or PUCCH ( The SSB index or the CSI-RS index (non-zero power (NZP)-CSI-RS resource ID) may be indicated as a reference RS (reference RS) having a spatial relationship with the DMRS of PUCCH).

The UE determines the panel used for uplink transmission based on whether the index (RS index) of the downlink reference signal included in the beam report information is the same as the reference RS indicated by the space-related information. Good.

Specifically, if the downlink RS of the RS index included in the beam report information is of the same type as the reference RS indicated by the spatial related information, the UE downlinks based on the panel information in the beam report information. Uplink transmission may be controlled using the same panel as reception (first BC-based upstream transmission).

On the other hand, when the downlink RS of the RS index included in the beam report information is the reference RS and the QCL type D indicated by the spatial related information, and the types are different, based on the panel information in the beam report information. The uplink transmission may be controlled using the same panel as the downlink reception, or the uplink transmission may be controlled using a panel different from the downlink reception (second BC-based uplink transmission).

<<First BC-based uplink transmission>>
5A and 5B are diagrams illustrating an example of first BC-based uplink transmission according to the second aspect. Note that the sequence shown in FIG. 5A is merely an example, and at least some steps may be omitted or steps not shown may be added. Further, the order of at least some of the steps may be exchanged.

In FIG. 5A, it is assumed that the downlink RS used for beam measurement and the reference RS having a spatial relationship with the target SRS designated by the spatial related information are of the same type. For example, although FIG. 5A shows an example in which the downlink RS and the reference RS are SSB, the present invention is not limited to this and may be CSI-RS.

As shown in FIG. 5A, in step S201, the UE receives SSB with one or more SSB indexes.

In step S202, the UE obtains a measurement result using SSB of a predetermined number of SSB indexes (for example, four SSB indexes #2, #3, #4, and #14 in FIG. 5A) and the predetermined number of SSB indexes. Corresponding panel information (eg, panel ID in FIG. 5B) may be sent.

In step S203, the UE may receive SRS configuration information (eg, “SRS-Config” of RRC IE) from the base station. The SRS setting information may include information on one or more SRS resources for each SRS resource set. The information about each SRS resource may include at least one of SRS resource ID, time domain resource, frequency domain resource, resource type, and spatial relationship information.

The spatial relationship information (for example, “SRS-SpatialRelationInfo” of RRC IE) corresponding to each SRS resource ID indicates the index of the reference RS (here, SSB) that has a spatial relationship with the SRS of each SRS resource ID. Good. For example, as shown in FIG. 5A, the spatial relationship information may also indicate the SSB index #2, #3, #6 or #14 reported from the UE to the base station in step S202 as the index of the reference RS. Good.

In step S204, the UE may detect DCI (for example, DCI format 0_1) used for PUSCH scheduling. The UE may determine the spatial relationship of the PUSCH based on the value of a predetermined field (eg, SRS resource identifier field) in the DCI.

Specifically, the UE, based on the spatial relationship information corresponding to the SRS resource ID indicated by the predetermined field value, has a reference RS (for example, SSB index #2, #3) that has a spatial relationship with the SRS of the SRS resource ID. , #6 or #14) may be determined.

In step S205, the UE may transmit the PUSCH using a transmission beam corresponding to the reception beam of the reference RS (for example, the same beam as the reception beam of the reference RS).

Also, the UE may assume the correspondence relationship between the SSB index and the panel ID reported in step S202 even when transmitting the PUSCH. For example, in FIG. 5B, the UE assigns the panel ID used for reception to the SSB index #2, #3, #6 or #14 to the SRS having the spatial relationship with the SSB index #2, #3, #6 or #14. It may be assumed that the PUSCH can be used for transmission based on the resource ID.

<<Second BC base uplink transmission>>
6A to 6D are diagrams showing an example of second BC-based uplink transmission according to the second mode. Note that in FIGS. 6A to 6D, differences from FIGS. 5A and 5B will be mainly described.

6A differs from FIG. 5A in that the downlink RS used for beam measurement and the reference RS having a spatial relationship with the target SRS designated by the spatial-related information are QCL type D and different types. .. For example, although FIG. 6A shows an example in which the downlink RS is SSB and the reference RS is CSI-RS, the present invention is not limited to this. That is, although not shown, the downlink RS may be CSI-RS and the reference RS may be SSB.

Steps S301 and S302 of FIG. 6A are the same as steps S201 and S202 of FIG. 5A. In step S303, the UE receives the SRS setting information including the spatial related information corresponding to each SRS resource ID.

The spatial relationship information is the SSB index #2, #3, #6 or #14 reported from the UE to the base station in step S302 as the index of the reference RS having a spatial relationship with the SRS of each SRS resource ID, and the QCL. The CSI-RS indexes #2, #3, #6, and #14 that are of type D and different types may be indicated.

In FIG. 6A, the CSI-RS index values “2”, “3”, “6” and “14” are the SSB index values “2” “3” “6” and the SSB index values reported to the base station in step S302. It is the same as “14”, but is not limited to this. The CSI index value specified by the spatial relationship information does not have to be the same value as long as it is a value corresponding to the SSB index value.

In step S304, the UE may detect the DCI (eg, DCI format 0_1) used for PUSCH scheduling. The UE, based on the spatial relationship information corresponding to the SRS resource ID indicated by the value of the predetermined field (for example, the SRS resource identifier field) in the DCI, the reference RS (for example, the reference RS that has the spatial relationship with the SRS of the SRS resource ID). CSI-RS index #2, #3, #6 or #14) may be determined.

In step S305, the UE may transmit the PUSCH by using a transmission beam corresponding to the reception beam of the reference RS (for example, the same beam as the reception beam of the reference RS).

In addition, the UE may assume that the correspondence between the SSB index and the panel ID reported in step S302 can be used as the correspondence between the CSI-RS index and the panel ID corresponding to the SSB index (for example, 6B, 6C).

Specifically, as shown in FIG. 6B, when reporting the panel ID corresponding to the SSB index to the base station, the UE determines that the CSI-RS index corresponding to the SSB index is the panel ID corresponding to the SSB index. You may assume that it corresponds to the same panel ID as. For example, when the spatial relationship information of the SRS resource ID specified in step S304 indicates CSI-RS resource #3, the UE determines that the SSB index #3 corresponding to the CSI-RS resource #3 is used as shown in FIG. 6C. It may be assumed that they correspond to the same panel ID “0”.

Alternatively, the UE may assume that the correspondence between the SSB index and the panel ID reported in step S302 cannot be used as the correspondence between the CSI-RS index and the panel ID corresponding to the SSB index (for example, 6B, 6D).

Specifically, as shown in FIG. 6B, when reporting the panel ID corresponding to the SSB index to the base station, the UE determines that the CSI-RS index corresponding to the SSB index is the panel ID corresponding to the SSB index. It may be assumed that it corresponds to a panel ID different from. For example, when the spatial relationship information of the SRS resource ID designated in step S304 indicates the CSI-RS resource #3, the UE has a panel ID “1” different from the SSB index #3 corresponding to the CSI-RS resource #3. May be assumed to correspond to.

Note that, although PUSCH is described above, it is also applicable to other uplink transmission such as PUCCH. For example, the spatial relationship information corresponding to each PUCCH resource ID (for example, “PUCCH-SpatialRelationInfo” of RRC IE) is the spatial relationship information corresponding to each SRS resource ID (for example, “SRS-SpatialRelationInfo” of RRC IE). It may be specified similarly.

As described above, in BC-based uplink transmission, the panel used for transmission of the uplink signal (for example, PUSCH or PUCCH) can be determined based on the correspondence between the downlink reference signal index and the panel.

<Non-BC based upstream transmission>
In the case of non-BC base (no BC), the spatial related information (eg, “SRS-SpatialRelationInfo” or “PUCCH-SpatialRelationInfo” of RRC IE) set in the UE is a desired signal (target signal, eg, SRS or PUCCH). The SRS resource ID may be indicated as a reference RS (reference RS) having a spatial relationship with (DMRS of PUCCH).

The UE may determine the panel to be used for uplink transmission based on the correspondence between the panel and the RS index (eg, SSB/CSI-RS index) indicated by the panel information in the beam report information (first non- BC-based upstream transmission).

Alternatively, the UE, apart from the correspondence between the RS index (for example, SSB/CSI-RS index) indicated by the panel information in the beam report information and the panel, the SRS resource ID and the panel configured in the SRS configuration information, The panel to be used for uplink transmission may be determined based on the correspondence relationship of (second non-BC-based uplink transmission).

<<First non-BC-based uplink transmission>>
7A to 7C are diagrams showing an example of first non-BC-based uplink transmission according to the second mode. Note that in FIGS. 7A to 7C, differences from FIGS. 5A and 5B or FIGS. 6A to 6D will be mainly described.

In FIG. 7A, it is the downlink RS (for example, SSB or CSI-RS) whose corresponding relationship with the panel is indicated by the panel information, whereas the reference RS designated by the space-related information is the uplink RS (for example, , SRS resource ID). For example, although FIG. 7A shows an example in which the downlink RS is SSB and the reference RS is SRS, the present invention is not limited to this. That is, although not shown, the downlink RS may be the CSI-RS and the reference RS may be the SRS.

Steps S401 and S402 of FIG. 7A are the same as steps S201 and S202 of FIG. 5A. In step S403, the UE receives the SRS setting information including the spatial related information corresponding to each SRS resource ID.

The spatial relationship information indicates the SRS resource ID (for example, SRS resource IDs #2, #3, #6, #14 in FIG. 7A) as an index of the reference RS having a spatial relationship with the SRS of each SRS resource ID. May be.

In FIG. 7A, the SRS resource ID values “2”, “3”, “6”, and “14” are SSB index values “2”, “3”, “6”, and “SBS index” reported to the base station in step S402. 14”, but is not limited to this. The value of the SRS resource ID specified by the spatial relationship information does not have to be the same value as long as it is a value corresponding to the value of the SSB index.

In step S404, the UE may detect the DCI (eg, DCI format 0_1) used for PUSCH scheduling. The UE, based on the spatial relationship information corresponding to the SRS resource ID indicated by the value of the predetermined field (for example, the SRS resource identifier field) in the DCI, the reference RS (for example, the reference RS that has the spatial relationship with the SRS of the SRS resource ID). SRS resource ID #2, #3, #6 or #14) may be determined.

The base station may determine the SRS resource ID specified by DCI based on the SRS measurement result (sounding result) of one or more SRS resource IDs transmitted from the UE. The transmission of the SRS of the one or more SRS resource IDs by the UE may be triggered by an upper layer parameter (eg, MAC control element (MAC CE)) or DCI. The SRS triggered by the MAC CE may be called a semi-persistent SRS (Semi-Persistent (SP)-SRS). The SRS triggered by DCI may also be called an aperiodic SRS (Aperiodic(A)-SRS). Alternatively, the base station may determine the SRS resource ID designated by DCI based on the measurement result of the SRS (Periodic SRS (Periodic (P)-SRS)) periodically transmitted from the UE.

In step S405, the UE may transmit the PUSCH using a beam corresponding to the SRS resource ID designated by the spatial relationship information (for example, a transmission beam having the designated SRS resource ID).

Further, the UE may assume that the correspondence relationship between the SSB index and the panel ID reported in step S402 can be used as the correspondence relationship between the SRS resource ID and the panel ID corresponding to the SSB index (for example, as illustrated in FIG. 7B, 7C).

Specifically, as shown in FIG. 7B, when reporting the panel ID corresponding to the SSB index to the base station, the UE determines that the SRI resource ID corresponding to the SSB index is the panel ID corresponding to the SSB index. It may be assumed that they correspond to the same panel ID. For example, when the spatial relationship information of the SRS resource ID designated in step S404 indicates the SRS resource ID #14, the UE has the same SSB index #14 corresponding to the SRS resource ID #14 as illustrated in FIG. 7C. It may be assumed that it corresponds to the panel ID “1”.

<<First non-BC-based uplink transmission>>
8A and 8B are diagrams illustrating an example of second non-BC-based uplink transmission according to the second aspect. 8A and 8B will be described focusing on differences from FIGS. 5A and 5B, FIGS. 6A to 6D, or FIGS. 7A to 7C. Steps S501 and S502 of FIG. 8A are the same as steps S201 and S202 of FIG. 5A.

In step S503, the UE receives SRS setting information including spatial related information corresponding to each SRS resource ID.

The spatial relationship information is an SRS resource ID (for example, SRS resource IDs #2, #3, #6, #14 in FIG. 8A) as an index of a reference RS that has a spatial relationship with the SRS of each SRS resource ID, and The panel ID corresponding to the SRS resource ID may be shown.

FIG. 8B is an example of the spatial relationship information. As shown in FIG. 8B, for example, the “SRS-SpatialRelationInfo” of the RRC IE may have an RRC IE “panel-Id” indicating the panel ID in association with the RRC IE “resourceId” indicating the SRS resource ID. The name of the RRC IE indicating the panel ID is not limited to that shown in FIG. 8B.

In step S504, the UE may detect DCI (for example, DCI format 0_1) used for PUSCH scheduling. The UE, based on the spatial relationship information corresponding to the SRS resource ID indicated by the value of the predetermined field (for example, the SRS resource identifier field) in the DCI, the reference RS (for example, the reference RS that has the spatial relationship with the SRS of the SRS resource ID). SRS resource ID #2, #3, #6 or #14) may be determined.

In step S505, the UE may transmit the PUSCH using a beam corresponding to the SRS resource ID designated by the spatial relationship information (for example, a transmission beam having the designated SRS resource ID). Further, it may be assumed that the UE uses the panel ID specified by the spatial relationship information for PUSCH transmission.

As described above, in non-BC-based uplink transmission, the panel to be used for uplink transmission can be determined based on the correspondence between the downlink DL and the panel or the panel ID specified in the spatial relationship information.

As described above, in the second aspect, the UE can determine the panel used for uplink transmission. Therefore, it can be determined that the power of a panel different from the panel can be turned off. Note that hysteresis may be used to turn off the power supply. For example, the UE may turn off the panel that is not used when the panel used for uplink transmission is not changed for a predetermined period.

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

FIG. 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication by using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..

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

In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR 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 a plurality of base stations within the same RAT (eg, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) may be supported.

The wireless communication system 1 includes a base station 11 forming a macro cell C1 having a relatively wide coverage and a base station 12 (12a-12c) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. You may prepare. The user terminal 20 may be located in at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to those shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the 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 (Carrier Aggregation (CA)) using a plurality of component carriers (Component Carrier (CC)) and dual connectivity (DC).

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

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

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

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

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

The wireless access method may be called a waveform. In the wireless communication system 1, other wireless access methods (eg, other single carrier transmission method, other multicarrier transmission method) may be used as the UL and DL wireless access methods.

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

Also, in the wireless communication system 1, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), and a random access channel that are shared by each user terminal 20. (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 PDSCH. User data, upper layer control information, and the like may be transmitted by the PUSCH. Also, the Master Information Block (MIB) may be transmitted by the PBCH.

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

The DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and the DCI for scheduling 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 (search space) may be used to detect the PDCCH. CORESET corresponds to a resource for searching DCI. The search space corresponds to the search area and the search method of the PDCCH candidates (PDCCH candidates). A CORESET may be associated with one or more search spaces. The UE may monitor CORESET associated with a search space based on the search space settings.

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 the “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.

Depending on the PUCCH, channel state information (Channel State Information (CSI)), delivery confirmation information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.) and scheduling request (Scheduling Request (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 the PRACH.

Note that, in the present disclosure, downlink, uplink, etc. may be expressed without adding “link”. Further, it may be expressed without adding "Physical" to the head of each channel.

In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), 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 at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)), for example. A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS block (SSB), or the like. Note that SS and SSB may also be referred to as reference signals.

Further, in the wireless communication system 1, even if a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. are transmitted as an uplink reference signal (Uplink Reference Signal (UL-RS)). Good. The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).

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

Note that, in this example, the functional blocks of the characteristic part in the present embodiment are mainly shown, 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 by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.

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

The transmission/reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmission/reception unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission/reception circuit, etc., which are explained based on common recognition in the technical field of the present disclosure. be able to.

The transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may include a transmission processing unit 1211 and an RF unit 122. The receiving unit may include a reception processing unit 1212, an RF unit 122, and a measuring unit 123.

The transmission/reception antenna 130 can be configured by an antenna described based on common recognition in the technical field of the present disclosure, for example, an array antenna or the like.

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

The transmission/reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

The transmission/reception unit 120 (transmission processing unit 1211) processes the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer (for example, for the data and control information acquired from the control unit 110) (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 transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) on the bit string to be transmitted. Processing (if necessary), inverse fast Fourier transform (Inverse Fast Transform (IFFT)) processing, precoding, digital-analog conversion, and other transmission processing may be performed to output the baseband signal.

The transmitting/receiving unit 120 (RF unit 122) may modulate the baseband signal into a radio frequency band, perform filtering, amplifying, etc., and transmit the radio frequency band signal via the transmission/reception antenna 130. ..

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

The transmission/reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (Fast Fourier Transform (FFT)) processing, and inverse discrete Fourier transform (Inverse Discrete Fourier Transform (IDFT)) on the acquired baseband signal. )) Applying reception processing such as processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, User data may be acquired.

The transmission/reception unit 120 (measurement unit 123) may perform measurement on 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 receives 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)), channel information (for example, CSI), etc. may be measured. The measurement result may be output to the control unit 110.

The transmission line interface 140 transmits/receives signals (backhaul signaling) to/from devices included in the core network 30, other base stations 10, and the like, and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.

Note that the transmission unit and the reception unit of the base station 10 according to the present disclosure may be configured by at least one of the transmission/reception unit 120 and the transmission/reception antenna 130.

Note that the transmission/reception unit 120 may receive the index of the downlink reference signal and the information indicating the correspondence relationship with the panel (first aspect). The transmitter/receiver 120 may also transmit the spatial relationship information including the index of the downlink reference signal. Further, the transceiver 120 may transmit the spatial relationship information including the resource identifier of the sounding reference signal (SRS). In addition, the transceiver 120 may transmit spatial relationship information including a resource identifier of a sounding reference signal (SRS) and information indicating a panel corresponding to the resource identifier.

The control unit 110 may determine the panel used for transmitting the uplink signal based on the correspondence between the index of the downlink reference signal and the panel.

The control unit 110 may assume that the panel corresponding to the index of the downlink reference signal is used for transmitting the uplink signal (second mode, first BC base uplink transmission).

The control unit 110 may assume that the panel corresponding to the index of the downlink reference signal corresponding to the other downlink reference signal is used for transmitting the uplink signal (second aspect, second BC). Base uplink transmission).

The control unit 110 may assume that a panel different from the panel corresponding to the index of the downlink reference signal corresponding to the other downlink reference signal is used for transmitting the uplink signal (second mode, Second BC-based upstream transmission).

The control unit 110 may assume that the panel corresponding to the index of the downlink reference signal corresponding to the resource identifier of the SRS is used for transmitting the uplink signal (second aspect, first non-BC). Base uplink transmission).

The control unit 110 may instruct the panel used for transmitting the uplink signal in the spatial relationship information (second aspect, second non-BC-based uplink transmission).

(User terminal)
FIG. 11 is a diagram illustrating an example of the configuration of the user terminal according to the embodiment. The user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Note that each of the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more.

Note that, in this example, the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 may be assumed to also have 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 by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.

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

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

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may include a transmission processing unit 2211 and an RF unit 222. The receiving unit may include a reception processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmission/reception antenna 230 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.

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

The transmission/reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

The transmission/reception unit 220 (transmission processing unit 2211) processes the PDCP layer, the RLC layer (for example, RLC retransmission control), and the MAC layer (for example, for the data and control information acquired from the control unit 210). , HARQ retransmission control) may be performed to generate a bit string to be transmitted.

The transmission/reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing on the bit string to be transmitted. The baseband signal may be output by performing transmission processing such as precoding, digital-analog conversion, or the like.

Note that whether or not to apply DFT processing may be based on the setting of transform precoding. The transmission/reception unit 220 (transmission processing unit 2211) transmits the channel using the DFT-s-OFDM waveform when transform precoding is enabled for the channel (for example, PUSCH). The DFT process may be performed as the transmission process, or otherwise, the DFT process may not be performed as the transmission process.

The transmission/reception unit 220 (RF unit 222) may modulate the baseband signal into a radio frequency band, perform filtering, amplification, etc., and transmit the radio frequency band signal via the transmission/reception antenna 230. ..

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

The transmission/reception unit 220 (reception processing unit 2212) performs analog-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction) on the acquired baseband signal. User data and the like may be acquired by applying reception processing such as MAC layer processing, RLC layer processing, and PDCP layer processing.

The transmission/reception unit 220 (measurement unit 223) may perform measurement on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, and the like 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), channel information (for example, CSI), and the like. The measurement result may be output to the control unit 210.

Note that the transmission unit and the reception unit of the user terminal 20 according to the present disclosure may be configured by at least one of the transmission/reception unit 220, the transmission/reception antenna 230, and the transmission path interface 240.

Note that the transmission/reception unit 220 may transmit the index of the downlink reference signal and the information indicating the correspondence relationship with the panel. Further, the transmitter/receiver 220 may receive the spatial relationship information including the index of the downlink reference signal. Also, the transceiver 220 may receive the spatial relationship information including the resource identifier of the sounding reference signal (SRS). In addition, the transceiver 220 may receive the spatial relationship information including the resource identifier of the sounding reference signal (SRS) and the information indicating the panel corresponding to the resource identifier.

The control unit 210 may determine the panel used for transmitting the uplink signal based on the correspondence between the index of the downlink reference signal and the panel.

The control unit 210 may use the panel corresponding to the index of the downlink reference signal for transmitting the uplink signal (second mode, first BC base uplink transmission).

The control unit 210 may use a panel corresponding to the index of the downlink reference signal corresponding to the other downlink reference signal for transmitting the uplink signal (second aspect, second BC base uplink transmission). ..

The control unit 210 may use a panel different from the panel corresponding to the index of the downlink reference signal corresponding to the other downlink reference signal for transmitting the uplink signal (second aspect, second BC). Base uplink transmission).

The control unit 210 may use a panel corresponding to the index of the downlink reference signal corresponding to the resource identifier of the SRS for transmitting the uplink signal (second aspect, first non-BC-based uplink transmission). ..

The control unit 210 may use the panel designated in the spatial relationship information for transmitting the uplink signal (second mode, second non-BC-based uplink transmission).

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

Here, the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting (notifying), notifying (communicating), forwarding (forwarding), configuring (reconfiguring), allocating (allocating, mapping), assigning, etc. Not limited. For example, a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. In any case, as described above, the implementation method is not particularly limited.

For example, the base station, the user terminal, and the like according to an embodiment of the present disclosure may function as a computer that performs the process of the wireless communication method of the present disclosure. FIG. 12 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment. The base station 10 and the 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, and the like. ..

Note that in the present disclosure, the terms such as a device, a circuit, a device, a section, and a unit can be read as each other. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.

For example, only one processor 1001 is shown, but there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or by using another method. The processor 1001 may be mounted by one or more chips.

For each function in the base station 10 and the user terminal 20, for example, by causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculation and communication via the communication device 1004. Is controlled, and at least one of reading and writing of data in the memory 1002 and the storage 1003 is controlled.

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

Further, the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least part of the operations described in the above-described embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.

The memory 1002 is a computer-readable recording medium, and for example, at least Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other appropriate storage media. It may be configured by one. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 may store an executable program (program code), a software module, etc. for implementing the 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 (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004, for example, realizes at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. May be included. For example, the transmission/reception unit 120 (220) and the transmission/reception antenna 130 (230) described above may be realized by the communication device 1004. The transmitter/receiver 120 (220) may be physically or logically separated from the transmitter 120a (220a) and the receiver 120b (220b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an 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. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

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.

In addition, the base station 10 and the user terminal 20 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), and the like. It may be configured to include hardware, and part or all of each functional block may be realized by using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.

(Modification)
The terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal (signal or signaling) may be read as each other. The signal may also be a message. The reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard. Moreover, a component carrier (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 a plurality of periods (frames) in the time domain. Each of the one or more periods (frames) forming the radio frame may be referred to as a subframe. Further, a subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (for example, 1 ms) that does not depend on the numerology.

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

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

A slot may include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. The minislot may also be called a subslot. Minislots may be configured with fewer symbols than slots. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be referred to as PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.

Radio frame, subframe, slot, minislot, and symbol all represent the time unit for signal transmission. Radio frames, subframes, slots, minislots, and symbols may have different names corresponding to them. It should be noted that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.

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. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be The unit representing the TTI may be called a slot, a minislot, etc. instead of a subframe.

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

The TTI may be a transmission time unit of a channel-encoded data packet (transport block), code block, codeword, or the like, or may be a processing unit of scheduling, link adaptation, or the like. When a TTI is given, the time interval (for example, the number of symbols) in which the transport block, code block, codeword, 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. Moreover, the number of slots (the number of mini-slots) forming 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), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. A TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

Note that a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and a short TTI (eg, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

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

Also, the RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length. One TTI, one subframe, etc. may be configured by one or a plurality of resource blocks.

One or more RBs are physical resource blocks (Physical RB (PRB)), subcarrier groups (Sub-Carrier Group (SCG)), resource element groups (Resource Element Group (REG)), PRB pairs, RBs. It may be called a pair or the like.

Also, a resource block may be composed of one or more resource elements (Resource Element (RE)). For example, 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.

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

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

At least one of the configured BWPs may be active, and the UE does not have to expect to send and receive a given signal/channel outside the active BWP. Note that “cell”, “carrier”, and the like in the present disclosure may be read as “BWP”.

Note that the structure of the radio frame, subframe, slot, minislot, symbol, etc. described above is merely an example. 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, and included in RBs The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.

Further, the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented. For example, the radio resource may be indicated by a predetermined index.

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

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. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of

Information and signals can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer. Information, signals, etc. may be input/output via a plurality of 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 input/output, signals, etc. may be overwritten, updated, or added. The output information, signal, etc. may be deleted. The input information, signal, etc. may be transmitted to another device.

The notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method. For example, notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), upper layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (Master Information Block (MIB)), system information block (System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof May be implemented by.

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), and the like. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like. Further, the MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).

Further, the notification of the predetermined information (for example, the notification of “being X”) is not limited to the explicit notification, and may be implicitly (for example, by not notifying the predetermined information or another information). May be carried out).

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

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

Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the software uses at least one of wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) , Servers, or other remote sources, these wired and/or wireless technologies are included within the definition of transmission media.

The terms "system" and "network" used in this disclosure may be used interchangeably. “Network” may mean a device (eg, a base station) included in the network.

In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “pseudo-collocation (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 for

In the present disclosure, “base station (BS)”, “radio base station”, “fixed station”, “NodeB”, “eNB (eNodeB)”, “gNB (gNodeB)”, "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel" , "Cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may be referred to by terms such as macro cell, small cell, femto cell, and pico cell.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being defined by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))) to provide communication services. The term "cell" or "sector" refers to part or all of the coverage area of a base station and/or a base station subsystem providing communication services in this coverage.

In the present 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 term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned type or unmanned type). ). At least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

Also, the base station in the present disclosure may be replaced by the user terminal. For example, the communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (eg, 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 function of the base station 10 described above. In addition, the words such as “up” and “down” may be replaced with the words corresponding to the terminal-to-terminal communication (for example, “side”). For example, the uplink channel and the downlink channel may be replaced with the side channel.

Similarly, the user terminal in the present disclosure may be replaced by the base station. In this case, the base station 10 may have the function of the user terminal 20 described above.

In the present disclosure, the operation supposed to be performed by the base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal include a base station and one or more network nodes other than the base station (for example, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. are conceivable, but not limited to these) or a combination of these is clear.

Each aspect/embodiment described in the present disclosure may be used alone, in combination, or may be switched according to execution. Further, the order of the processing procedure, sequence, flowchart, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.

Each aspect/embodiment described in the present 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), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global. System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802. 20, Ultra-WideBand (UWB), Bluetooth (registered trademark), a system using any other suitable wireless communication method, and a next-generation system extended based on these may be applied. Also, a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).

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

Any reference to elements using designations such as “first”, “second”, etc. used in this disclosure 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, references to the first and second elements do not mean that only two elements can 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" means "judging", "calculating", "computing", "processing", "deriving", "investigating", "searching" (looking up, search, inquiry) ( For example, it may be considered to be a "decision" for a search in a table, database or another data structure), ascertaining, etc.

In addition, "decision (decision)" includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), access ( Accessing) (e.g., accessing data in memory) and the like may be considered to be a "decision."

In addition, "judgment (decision)" is considered to be "judgment (decision)" such as resolving, selecting, choosing, choosing, establishing, establishing, and comparing. Good. That is, “determination (decision)” may be regarded as “determination (decision)” of some operation.

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

The “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, the nominal maximum transmission power (the nominal UE maximum transmit power), or the rated maximum transmission power (the It may mean rated UE maximum transmit power).

As used in this disclosure, the term "connected," "coupled," or any variation thereof, refers to any direct or indirect connection or coupling between two or more elements. And can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. The connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.

In this disclosure, where two elements are connected, one or more wires, cables, printed electrical connections, etc. are used, as well as some non-limiting and non-exhaustive examples, radio frequency domain, microwave Regions, electromagnetic energy having wavelengths in the light (both visible and invisible) region, etc. can be used to be considered "connected" or "coupled" to each other.

In the present disclosure, the term “A and B are different” may mean “A and B are different from each other”. The term may mean that “A and B are different from C”. The terms "remove", "coupled" and the like may be construed similarly as "different".

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

In the present disclosure, if translations add articles, such as a, an, and the in English, the disclosure may include that the noun that follows these articles is plural.

The invention according to the present disclosure has been described above in detail, but it is obvious to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and changed modes without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of exemplifying description, and does not bring any limiting meaning to the invention according to the present disclosure.

Claims

A transmission unit that transmits information indicating the correspondence between the downlink reference signal index and the panel,
A control unit that determines a panel to be used for transmitting an upstream signal based on the correspondence relationship,
A user terminal comprising:
A receiving unit for receiving spatial relationship information including the index of the downlink reference signal,
The user terminal according to claim 1, wherein the control unit uses a panel corresponding to an index of the downlink reference signal for transmitting the uplink signal.
A receiving unit that receives spatial relationship information including indexes of other downlink reference signals,
The user terminal according to claim 1, wherein the control unit uses a panel corresponding to an index of the downlink reference signal corresponding to the other downlink reference signal for transmitting the uplink signal.
A receiving unit that receives spatial relationship information including indexes of other downlink reference signals,
The said control part uses a panel different from the panel corresponding to the index of the said downlink reference signal corresponding to the index of the said other downlink reference signal for transmission of the said uplink signal, The claim 1 characterized by the above-mentioned. User terminal.
A receiver for receiving spatial relation information including a resource identifier of a sounding reference signal (SRS),
The user terminal according to claim 1, wherein the control unit uses a panel corresponding to an index of the downlink reference signal corresponding to the resource identifier of the SRS for transmitting the uplink signal.
Transmitting information indicating the correspondence between the downlink reference signal index and the panel,
Determining a panel to be used for transmitting an upstream signal based on the correspondence,
A wireless communication method for a user terminal, comprising: