JP7343957B2 - Terminals, wireless communication methods, base stations and systems - Google Patents

Description

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

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

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

In existing LTE systems (for example, LTE Rel. 8-14), user equipment (UE) uses downlink control information transmitted via a downlink control channel (for example, Physical Downlink Control Channel (PDCCH)). (also referred to as Downlink Control Information (DCI), DL assignment, etc.), the reception of a downlink shared channel (eg, Physical Downlink Shared Channel (PDSCH)) is controlled. Further, the user terminal controls transmission of an uplink shared channel (for example, Physical Uplink Shared Channel (PUSCH)) based on DCI (also referred to as UL grant or the like).

In existing LTE systems (for example, LTE Rel. 8-13), user equipment (UE) periodically and/or aperiodically sends channel state information (Channel State Information) to a base station. CSI)). The UE transmits CSI using an uplink control channel (Physical Uplink Control Channel (PUCCH)) and/or an uplink shared channel (Physical Uplink Shared Channel (PUSCH)).

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

In future wireless communication systems (eg, NR), transmission using multiple transmission points (transmission/reception points, panels, etc.) is being considered.

However, channel state information (CSI) is different between multiple transmission points. If CSI reporting to multiple transmission points is not performed appropriately, there is a risk that communication quality will deteriorate.

Therefore, one object of the present disclosure is to provide a terminal , a wireless communication method , a base station, and a system that appropriately perform CSI reporting for multiple transmission points.

A terminal according to an aspect of the present disclosure receives configuration information regarding a plurality of channel state information (CSI) reports respectively corresponding to a plurality of transmission points, and receives at least one instruction regarding the plurality of CSI reports. and a control unit configured to perform the plurality of CSI reports based on the at least one instruction , the receiving unit configured to configure a first setting of a CSI report corresponding to a first transmission point, and a control unit configured to perform a second transmission point. The control unit receives an association with a second setting of a CSI report corresponding to a point, and determines at least one of the first setting and the second setting based on the association. .

According to one aspect of the present disclosure, CSI reporting for multiple transmission points can be appropriately performed.

FIGS. 1A to 1C are diagrams illustrating an example of multiple TRP transmission. FIG. 2 is a diagram illustrating an example of mapping of resource settings and report settings. FIG. 3 is a diagram illustrating an example of a method for triggering or activating a CSI report for CSI-RS configuration. FIG. 4 is a diagram illustrating an example of resource settings and report settings corresponding to multiple TRPs. 5A to 5D are diagrams illustrating an example of the operation of multiple TRP transmission. FIG. 6 is a diagram illustrating an example of mapping of report settings between multiple TRPs. FIG. 7 is a diagram illustrating an example of upper layer parameters indicating mapping of report settings between multiple TRPs. FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.

(Multiple TRP transmission)
In future wireless communication systems (for example, Rel. 16 and later), it is being considered that non-coherent DL (for example, PDSCH) transmission will be performed from a plurality of transmission points. Transmission in which non-coherent DL signals (or DL channels) are cooperatively performed from a plurality of transmission points may be referred to as NCJT (Non-Coherent Joint Transmission).

Furthermore, in the present disclosure, a transmission point may be read as a transmission/reception point (TRP), a panel (an antenna panel, a plurality of antenna elements), an antenna, an antenna port, or a cell. The transmission point (TRP, panel, etc.) may be, for example, a beam, a spatial filter, a reference signal (RS) resource, a quasi co-location (QCL), a transmission configuration indication (TCI), or the like. can be replaced by a grouping concept.

It is also assumed that the scheduling of non-coherent PDSCHs transmitted from a plurality of transmission points is controlled using one or more Downlink Control Information (DCI). As an example, at least one of a plurality of downlink control channels (eg, PDCCH) and DCI is used to schedule PDSCHs transmitted from a plurality of transmission points.

In this case, it is also possible to allocate and transmit PDSCHs transmitted from different transmission points to the same resource (eg, time and frequency resource). For example, a configuration in which PDSCHs corresponding to the same codeword (CW) are transmitted in different layers (see FIG. 1A) and a configuration in which PDSCHs corresponding to different CWs are transmitted (see FIG. 1B) are supported.

In FIG. 1A, the PDSCH transmitted from the first transmission point (corresponding to CW #1) utilizes at least one of layers 1 and 2, and the PDSCH transmitted from the second transmission point (corresponding to CW #1) utilizes at least one of layers 1 and 2. ) are allocated to the same time and frequency resources using at least one of layers 3 and 4.

In FIG. 1B, when the PDSCH transmitted from the first transmission point (corresponding to CW #1) and the PDSCH transmitted from the second transmission point (corresponding to CW #2) are allocated to the same time and frequency resources. It shows.

Also, as shown in FIG. 1C, in multiple TRP transmission, multiple PDSCHs may be transmitted in different Multiple Input Multiple Output (MIMO) layers. Furthermore, the time resources and frequency resources of multiple PDSCHs may overlap.

The UE may be configured for communication using multiple TRPs (eg, multiple TRP transmission) by upper layer signaling (configuration information). For communication using multiple TRPs, the UE may be notified of information (at least one of upper layer signaling and DCI) indicating allocation of multiple resources that respectively correspond to multiple TRPs.

A plurality of TRPs may belong to a synchronous network or an asynchronous network. Further, the plurality of TRPs may be connected via an ideal backhaul or may be connected via a non-ideal backhaul.

(BWP)
Future wireless communication systems (e.g. NR, 5G or 5G+) will require carriers (Component Carriers: CC), cells, system bands, etc.) are being considered.

On the other hand, in the future wireless communication system, user terminals (also referred to as Wideband (WB) UE, single carrier WB UE, etc.) that have the ability to transmit and/or receive (transmission and reception) over the entire carrier, and the carrier It is assumed that there will be a mixture of user terminals (also referred to as reduced bandwidth (BW) UEs, etc.) that do not have the ability to transmit and receive data as a whole.

In this way, in future wireless communication systems, it is expected that multiple user terminals will coexist in the supported bandwidth (various BW UE capabilities). It is being considered to configure the system manually. Each frequency band (for example, 50 MHz or 200 MHz) within the carrier is called a subband or a bandwidth part (BWP).

Activation or deactivation of BWP may be controlled. Here, activating a BWP means making the BWP available for use (or transitioning to the available state), and activating the BWP configuration information (BWP configuration information) or Also called activation. Furthermore, deactivation of a BWP means that the BWP is in an unusable state (or transitions to an unusable state), and is also called deactivation or invalidation of BWP setting information. By scheduling the BWP, this BWP will be activated. Furthermore, activation or deactivation of at least one of the plurality of BWPs may be controlled.

(Resource settings and report settings)
Rel. In 15, the UE may be configured with at least one resource setting (CSI-RS resource configuration) and at least one reporting setting (CSI-RS resource configuration) for CSI. stipulated.

For example, as shown in FIG. 2, the UE may set resource settings #0, #1, and #2 using upper layer parameters (for example, CSI-ResourceConfig). Each resource setting may include multiple CSI-RS resource sets (eg, CSI-RS resource sets #0, #1, #2). Each CSI-RS resource set may include multiple CSI-RS resources.

The UE may be configured with multiple report settings #0 and #1 by upper layer parameters (for example, CSI-ReportConfig). Report setting #0 may be associated with resource settings #0, #1, and report setting #1 may be associated with resource settings #0, #2.

Rel. In 15, CSI-RS (CSI-RS resource) settings include periodic CSI-RS (P-CSI-RS), semi-persistent CSI-RS (SP-CSI-RS), and semi-persistent CSI-RS (SP-CSI-RS). ), aperiodic CSI-RS (A-CSI-RS), are supported.

Also, Rel. 15, periodic CSI (P-CSI) reports, semi-persistent CSI (SP-CSI) reports, and aperiodic CSI (A-CSI) reports are supported as CSI reports. As SP-CSI reports, SP-CSI Reporting on PUCCH and SP-CSI Reporting on PUSCH are supported.

FIG. 3 shows Rel. 15 is a diagram illustrating an example of a method of triggering or activating a CSI report for CSI-RS settings in FIG.

Just as SRS (Sounding Reference Signal) transmissions are classified into P-SRS, SP-SRS, and A-SRS, CSI reports are classified into P-CSI reports, SP-CSI reports, and A-CSI reports. Good too.

When P-CSI-RS is configured as the CSI-RS configuration, P-CSI reporting, SP-CSI reporting on PUCCH, SP-CSI reporting on PUSCH, and A-CSI reporting are supported. P-CSI reporting is configured by RRC parameters and the UE does not receive any dynamic triggering or activation.

For SP-CSI reporting, the UE receives an activation command for reporting on PUCCH by the MAC CE or a trigger on DCI for reporting on PUSCH. The DCI performs a cyclic redundancy check using a Radio Network Temporary Identifier (RNTI) for SP-CSI reporting (e.g., SP-CSI-RNTI, SP-CSI C-RNTI (SP-CSI Cell-RNTI)). (Cyclic Redundancy Check: CRC) The DCI may have masked (scrambled) bits. The UE stops SP-CSI-RS measurement and SP-CSI reporting when it receives a predetermined deactivation (release) signal or when a predetermined timer started by an activation command (trigger) expires. You may.

A-CSI reporting is triggered by the DCI. The A-CSI report may use an activation command.

When SP-CSI-RS is configured as the CSI-RS configuration, SP-CSI reporting on PUCCH, SP-CSI reporting on PUSCH, and A-CSI reporting are supported.

If A-CSI-RS is configured as the CSI-RS configuration, A-CSI reporting is supported.

In communication using multiple TRPs, different CSIs are required for different TRPs. However, Rel. In No. 15, CSI for one TRP is defined, so it is not clear how to report and set CSI for multiple TRPs in communication using multiple TRPs.

Therefore, the present inventors came up with the idea of configuring (e.g., resource setting, report setting) or instructing (e.g., activation, deactivation, or triggering) multiple CSI reports corresponding to multiple transmission points, respectively. did.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Each of the following embodiments may be applied alone or in combination.

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

The MAC signaling may use, for example, a MAC Control Element (CE), a MAC Protocol Data Unit (PDU), or the like. Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and Other System Information. :OSI).

In this disclosure, TRP, transmission point, DMRS port group, MIMO layer, panel, cell, carrier, component carrier (CC), PDSCH, codeword, base station, beam, etc. may be interchanged.

New information such as a new DCI field and a new RNTI is specified in a specific release (e.g., Rel. 16 or later) and is not specified in a release older than the specific release (e.g., Rel. 15). It may be read as information.

(Wireless communication method)
<Embodiment 1>
The UE may be configured with multiple CSI reports (report settings) that respectively correspond to multiple TRPs.

As shown in FIG. 4, the UE may be configured with resource settings and reporting settings for TRP#0, and configured with resource settings and reporting settings for TRP#1.

The UE may be configured with resource settings #0, #1, #2 for TRP #0, and report settings #0, #1 for TRP #0. Report setting #0 for TRP #0 is associated with resource settings #0, #1 for TRP #0, and report setting #1 for TRP #0 is associated with resource settings #0, #2 for TRP #0. may be associated with.

Similarly, the UE may be configured with resource settings #0, #1, #2 for TRP #1, and report settings #0, #1 for TRP #1. Report setting #0 for TRP #1 is associated with resource settings #0, #1 for TRP #1, and report setting #1 for TRP #1 is associated with resource settings #0, #2 for TRP #1. may be associated with.

The UE may receive a PDCCH from at least one of the plurality of TRPs according to at least one of the following embodiments 1-1, 1-2.

《Embodiment 1-1》
The UE may receive multiple PDCCHs from multiple TRPs. The PDCCH from each TRP may schedule corresponding data (one PUSCH transmitted to the corresponding TRP or one PDSCH transmitted from the corresponding TRP).

For example, as shown in FIG. 5D, there is a case (mode, type, etc.) where TRP #0 transmits DCI #1 that schedules PDSCH, and TRP #1 transmits DCI #2 that schedules PDSCH. Good too. DCI #2 may be transmitted within the same slot as DCI #1.

The UE may be configured by upper layer parameters to receive multiple PDCCHs from multiple TRPs, respectively.

The UE may trigger, activate, or deactivate the corresponding CSI reporting by the DCI or MAC CE. Regardless of how many PUCCHs or PUSCHs are used for CSI reporting, the UE may trigger, activate, or deactivate the corresponding CSI reporting by the DCI or MAC CE. , activated, or deactivated).

According to the above embodiment 1-2, at least one of activation, deactivation, and triggering can be appropriately performed on a plurality of CSI reports corresponding to a plurality of TRPs. Furthermore, by sending instructions corresponding to each of a plurality of TRPs, at least one of activation, deactivation, and triggering can be performed flexibly.

《Embodiment 1-2》
A UE may receive a PDCCH from one of multiple TRPs. The PDCCH may schedule a plurality of data corresponding to each of a plurality of TRPs (a plurality of PUSCHs respectively transmitted to a plurality of TRPs, or a plurality of PDSCHs respectively transmitted from a plurality of TRPs).

For example, as shown in FIG. 5A, there may be a case where TRP #0 transmits a DCI, and the DCI schedules data corresponding to TRP #0. Alternatively, as shown in FIG. 5B, the case may be such that TRP #0 transmits the DCI, and the DCI schedules two data corresponding to TRP #0 and #1, respectively. Further, as shown in FIG. 5C, TRP #0 transmits DCI part 1, TRP #1 transmits DCI part 2, and DCI part 1 and DCI part 2 correspond to TRP #0 and #1. It may also be a case of scheduling one piece of data. DCI Part 2 may depend on DCI Part 1. DCI Part 1 may include auxiliary information for decoding DCI Part 2. DCI Part 2 may be transmitted within the same slot as DCI Part 1.

The UE may trigger, activate, or deactivate a CSI report according to at least one of the following embodiments 1-2-1 to 1-2-3. ).

<<Embodiment 1-2-1>>
The UE may activate or deactivate SP-CSI reporting on the PUCCH.

The UE may be activated for SP-CSI reporting on the PUCCH according to at least one of the following options 1a, 1b.

《《Option 1a》》
The UE may be independently activated with multiple CSI reports, each corresponding to multiple TRPs. The UE may have the index of CSI reporting activated by the corresponding MAC CE. The MAC CE may be sent from the corresponding TRP (with the corresponding DMRS port group).

The UE may feedback X CSI if X CSI reporting is activated by X MAC CEs, respectively.

If the UE is allowed at most Y CSI reports for one MAC CE, for example, the UE is allowed at most 2Y CSI reports for two TRPs (two DMRS port groups). may be done.

《《Option 1b》》
The UE may be activated together with multiple CSI reports corresponding to multiple TRPs. A UE may be activated for CSI reporting by one MAC CE from one TRP.

If CSI-RS resources (for example, SP-CSI-RS resources) are configured for some of multiple TRPs (if CSI-RS resources are not configured for at least one TRP), the UE - SP-CSI reporting may be activated only for TRPs configured with RS resources.

The UE may determine at least one of CSI-RS resources and CSI reporting for at least one TRP based on a mapping between reporting settings for different TRPs (Embodiment 2 described below). For example, if the UE is activated by one CSI report by one MAC CE from one TRP, it may activate the CSI report mapped to that CSI report.

The UE may be deactivated to report SP-CSI on the PUCCH. The UE may be deactivated SP-CSI reporting on the PUCCH according to at least one of the following options 2a-2c.

《《Option 2a》》
The UE may be independently deactivated with multiple CSI reports corresponding to multiple TRPs. The UE deactivates the SP-CSI report when the DL BWP or UL BWP for the PDSCH (MAC CE) corresponding to the TRP is changed while the SP-CSI report for one TRP is activated. may be done.

《《Option 2b》》
The UE may be deactivated by collectively receiving multiple CSI reports corresponding to multiple TRPs. The UE may have all SP-CSI reporting deactivated if at least one of the BWPs is changed while SP-CSI reporting is activated.

《《Option 2c》》
The UE may be deactivated by collectively receiving multiple CSI reports corresponding to multiple TRPs. A UE may have all CSI reporting deactivated by one MAC CE from one TRP. When the UE deactivates the SP-CSI reporting for one TRP in a state where the SP-CSI reporting for two TRPs is activated, the SP-CSI reporting for the other TRP may also be deactivated.

<<Embodiment 1-2-2>>
The UE may be activated for SP-CSI reporting on the PUSCH. The UE may be activated for SP-CSI reporting on the PUSCH according to at least one of the following options 1a, 1b.

《《Option 1a》》
The UE may be independently activated with multiple CSI reports, each corresponding to multiple TRPs. A UE may be activated for one or more CSI reporting by multiple values of DCI (eg, a new DCI field). The CSI request field or CRC of the DCI may be scrambled with a specific RNTI (eg, SP-CSI-RNTI, new RNTI).

Rel. 15, the size (length) of the CSI request field in the DCI is defined as 0, 1, 2, 3, 4, 5, or 6 bits by the upper layer parameter reportTriggerSize. To independently activate CSI reports corresponding to two TRPs, the size (length) of the CSI request field can be set to 0, 2, 4, 6, 8, 10, 12 depending on the upper layer parameter (e.g. reportTriggerSize). may be defined on any of the bits.

《《Option 1b》》
The UE may be activated together with multiple CSI reports corresponding to multiple TRPs. The UE may have multiple CSI reports activated by the same DCI (eg, existing DCI field, CSI request field), each corresponding to multiple TRPs. The CSI request field or CRC of the DCI may be scrambled with a specific RNTI (eg, SP-CSI-RNTI, new RNTI).

The UE may be deactivated to report SP-CSI on the PUSCH. The UE may be deactivated SP-CSI reporting on the PUCCH according to at least one of the following options 2a-2c.

《《Option 2a》》
The UE may be independently deactivated with multiple CSI reports corresponding to multiple TRPs. The UE may deactivate the SP-CSI report for one TRP if the DL BWP or UL BWP for the PDCCH corresponding to the TRP is changed while the SP-CSI report for one TRP is activated. .

《《Option 2b》》
The UE may be deactivated by collectively receiving multiple CSI reports corresponding to multiple TRPs. The UE may have all SP-CSI reporting deactivated if at least one of the BWPs is changed while SP-CSI reporting is activated.

《《Option 2c》》
The UE may be deactivated by collectively receiving multiple CSI reports corresponding to multiple TRPs. The UE may have all CSI reporting deactivated by one PDCCH from one TRP. When the UE deactivates the SP-CSI reporting for one TRP in a state where the SP-CSI reporting for two TRPs is activated, the SP-CSI reporting for the other TRP may also be deactivated.

<<Embodiment 1-2-3>>
The UE may be triggered for A-CSI reporting. The UE may be triggered to report A-CSI according to at least one of the following options 1, 2:

《《Option 1》》
The UE may be independently triggered to report multiple CSI, each corresponding to multiple TRPs. A UE may be triggered to report one or more CSI by multiple values of DCI (eg, a new DCI field). The CSI request field or CRC of the DCI may be scrambled with a specific RNTI (eg, SP-CSI-RNTI, new RNTI).

Rel. In step 15, the size (length) of the CSI request is defined as 0, 1, 2, 3, 4, 5, or 6 bits by the upper layer parameter reportTriggerSize. To activate CSI reports corresponding to two TRPs independently, the size (length) of the CSI request can be set to 0, 2, 4, 6, 8, 10, 12 bits depending on the upper layer parameter (e.g. reportTriggerSize). may be defined as either.

《《Option 2》》
The UE may be triggered to collectively report multiple CSI reports corresponding to multiple TRPs. A UE may trigger multiple CSI reports for multiple TRPs by the same DCI (eg, existing DCI field, CSI request field). The CSI request field or CRC of the DCI may be scrambled with a specific RNTI (eg, SP-CSI-RNTI, new RNTI).

According to the above embodiment 1-2, at least one of activation, deactivation, and triggering can be appropriately performed on a plurality of CSI reports corresponding to a plurality of TRPs. Further, since at least one of activation, deactivation, and triggering is performed using one PDCCH or MAC CE, signaling overhead can be suppressed.

<Embodiment 2>
The UE may determine at least one reporting setting using a mapping between multiple reporting settings for different TRPs.

Rel. At 15, the UE is configured with a mapping between CSI-RS resource settings and reporting settings, as shown in FIG.

Furthermore, the UE may use a mapping between different reporting settings, as shown in FIG. 6.

For example, if reporting setting #0 for TRP #0 is associated with reporting setting #1 for TRP #1, the UE may activate, deactivate, or trigger reporting setting #0 for TRP #0. Accordingly, report setting #1 for TRP #1 associated with that report setting may be activated, deactivated, or triggered.

The UE may be configured with mapping according to at least one of the following embodiments 2-1, 2-2.

According to Embodiment 2-1 above, the UE can determine reporting settings for at least one TRP using mapping. Furthermore, since there is no need to notify the UE of information regarding mapping, signaling overhead can be suppressed.

《Embodiment 2-1》
The UE may use implicit mapping between reporting settings for different TRPs.

The UE may have reporting settings activated by at least one of the following options 1, 2: The UE may deactivate or trigger reporting settings in a similar manner.

《《Option 1》》
The same report setting IDs may be associated with each other between different TRPs.

If the UE has the reporting setting #X of the TRP #i activated, the reporting setting #X of the TRP #j (same reporting setting ID) may also be activated.

《《Option 2》》
Report settings IDs between different TRPs may be related by a specific formula.

When the UE activates the reporting setting #X (X=0, 1, ..., N-1) of TRP#i, the reporting setting #(N-X-1) of TRP#j may also be activated. . Here, N may be the total number of report settings.

《Embodiment 2-2》
The UE may use explicit mapping between reporting settings for different TRPs.

The UE may be configured with a mapping between multiple reporting settings via higher layer parameters. When the UE receives at least one indication of activation, deactivation, and trigger of the reporting settings of one of the plurality of TRPs, the UE configures the reporting settings of the other TRPs associated with the reporting settings based on the mapping. The same instructions may be applied.

For example, as shown in FIG. 7, the upper layer parameters (RRC information elements, e.g., CSI-MeasConfig) of the reporting settings for the case using multiple TRPs are the information indicating the mapping of the reporting settings (e.g., L1 (layer 1, CSI-SemiPersistentOnPUSCH-TriggerStateList). This list may indicate IDs (eg, CSI-SemiPersistentOnPUSCH-TriggerState, CSI-ReportConfigId) of other TRP report settings (CSI report settings) associated with the report mapping.

The associated report setting ID shown in the list for TRP#0 may indicate the report setting ID set for TRP#1. The associated report setting ID shown in the list for TRP#1 may indicate the report setting ID set for TRP#0.

According to Embodiment 2-2 above, the UE can determine reporting settings for at least one TRP using mapping. Additionally, mapping can be set flexibly.

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

FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .

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

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

The wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)). )) may be supported.

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

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

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

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

The plurality of base stations 10 may be connected by wire (for example, optical fiber 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 base stations 11 and 12, base station 11, which is an upper-level station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a node.

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

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

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

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

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

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

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

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

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

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

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

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

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

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), Positioning Reference Signal (PRS), Phase Tracking Reference Signal (PTRS), etc. may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

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

(base station)
FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that 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 base station 10 as a whole. The control unit 110 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

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

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

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

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

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

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

The transmitting/receiving unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, on the data, control information, etc. acquired from the control unit 110). RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

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

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

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

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

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

The transmission path interface 140 transmits and receives signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and transmits and receives user data (user plane data) for the user terminal 20, control plane It is also possible to acquire and transmit data.

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

Further, the transmitting/receiving unit 120 may transmit configuration information regarding a plurality of channel state information (CSI) reports corresponding to a plurality of transmission points, respectively, and transmit at least one instruction regarding the plurality of CSI reports. The transmitting/receiving unit 120 may transmit information regarding mapping between CSI report configuration information of a plurality of transmission points.

(user terminal)
FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

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

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

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

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

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

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

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

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

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

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

Note that whether or not to apply DFT processing may be based on the settings of transform precoding. When transform precoding is enabled for a certain channel (for example, PUSCH), the transmitting/receiving unit 220 (transmission processing unit 2211) performs the above processing in order to transmit the channel using the DFT-s-OFDM waveform. DFT processing may be performed as the transmission processing, or if not, DFT processing may not be performed as the transmission processing.

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

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

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

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

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

The transmitter/receiver 220 also transmits a plurality of channel state information (CSI) reports (e.g., SP-CSI report on PUCCH, SP-CSI report on PUSCH, A- CSI reporting, etc.); and receiving at least one instruction (e.g., activation, deactivation, trigger, MAC CE, DCI, etc.) regarding the plurality of CSI reports. You may. The control unit 210 may perform the plurality of CSI reports based on the at least one instruction.

Further, the transmitting/receiving unit 220 receives the plurality of instructions (for example, the plurality of DCIs, the plurality of MAC CEs) from the plurality of transmission points, and the control unit 210, based on each of the plurality of instructions, A corresponding CSI report may also be made (Embodiment 1-1).

Further, the transmitting/receiving unit 220 receives one instruction regarding the plurality of CSI reports (for example, one DCI, one MAC CE) from one of the plurality of transmission points, and the control unit 210 receives one instruction regarding the plurality of CSI reports (for example, one DCI, one MAC CE), and the control unit 210 The plurality of CSI reports may be performed based on the instructions (Embodiment 1-2).

Further, the control unit 210 sends a CSI report corresponding to the first transmission point and a second transmission point (for example, For example, CSI reporting corresponding to TRP#1, TRP#j) may be performed (Embodiment 2-1).

The transmitter/receiver 220 also configures a first setting (for example, report setting, CSI report setting) of the CSI report corresponding to the first transmission point and a second setting (for example, report setting) of the CSI report corresponding to the second transmission point. , CSI reporting settings), and the control unit 210 may determine at least one of the first setting and the second setting based on the association (Embodiment 2). -2, option 1b of Embodiment 1-3-1).

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

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

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. .

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

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

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

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

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

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

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

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

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

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

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

(Modified example)
Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal may be interchanged. Also, the signal may be a message. The reference signal may also be abbreviated as RS, and may be called a pilot, pilot signal, etc. depending on the applicable standard. Further, a component carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

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

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

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

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

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

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

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

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , handset, user agent, mobile client, client, or some other suitable terminology.

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

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

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

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

Each aspect/embodiment described in this disclosure may be used alone, may be used in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps and are not limited to the particular order presented.

Each aspect/embodiment described in this disclosure is applicable to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802. 20, Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, and next-generation systems expanded based on these may be applied. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

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

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

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

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

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

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

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

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

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

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

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

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

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

Claims (7)

a receiving unit that receives configuration information regarding a plurality of channel state information (CSI) reports respectively corresponding to a plurality of transmission points, and receives at least one instruction regarding the plurality of CSI reports;
a control unit that performs the plurality of CSI reports based on the at least one instruction ;
The receiving unit receives an association between a first setting of a CSI report corresponding to a first transmission point and a second setting of a CSI report corresponding to a second transmission point,
The terminal , wherein the control unit determines at least one of the first setting and the second setting based on the association . The receiving unit receives a plurality of instructions from the plurality of transmission points, respectively,
The terminal according to claim 1, wherein the control unit performs a corresponding CSI report based on each of the plurality of instructions. The receiving unit receives one instruction regarding the plurality of CSI reports from one of the plurality of transmission points,
The terminal according to claim 1, wherein the control unit performs the plurality of CSI reports based on the one instruction. The control unit is characterized in that, in response to an instruction regarding the CSI report corresponding to the first transmission point, the control unit performs a CSI report corresponding to the first transmission point and a CSI report corresponding to the second transmission point. The terminal according to claim 1. Setting information regarding a plurality of channel state information (CSI) reports respectively corresponding to a plurality of transmission points , a first setting of a CSI report corresponding to a first transmission point, and a second setting of a CSI report corresponding to a second transmission point. a configuration and an association , and receiving at least one instruction regarding the plurality of CSI reports;
determining at least one of the first setting and the second setting based on the association;
A wireless communication method for a terminal , comprising the step of reporting the plurality of CSI based on the at least one instruction. a transmitter configured to transmit configuration information regarding a plurality of channel state information (CSI) reports respectively corresponding to a plurality of transmission points, and transmit at least one instruction regarding the plurality of CSI reports;
a control unit that instructs to perform the plurality of CSI reports according to the at least one instruction;
The control unit sets an association between a first setting of a CSI report corresponding to a first transmission point and a second setting of a CSI report corresponding to a second transmission point,
The base station is characterized in that the transmitter transmits the association. A system having a terminal and a base station,
a receiving unit in which the terminal receives configuration information regarding a plurality of channel state information (CSI) reports respectively corresponding to a plurality of transmission points, and receives at least one instruction regarding the plurality of CSI reports;
a control unit that performs the plurality of CSI reports based on the at least one instruction;
The receiving unit receives an association between a first setting of a CSI report corresponding to a first transmission point and a second setting of a CSI report corresponding to a second transmission point,
The control unit determines at least one of the first setting and the second setting based on the association,
The base station includes a transmitting unit that transmits the configuration information and transmits the at least one instruction;
a control unit that instructs to perform the plurality of CSI reports according to the at least one instruction;
The control unit sets the association,
A system characterized in that the transmitter transmits the association.

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