JPWO2020148839A1 - User terminal and wireless communication method - Google Patents

Abstract

The user terminal receives the setting information regarding the plurality of channel state information (CSI) reports corresponding to the plurality of transmission points, and receives at least one instruction regarding the plurality of CSI reports, and the at least one instruction. Based on the above, it has a control unit that performs the plurality of CSI reports. According to one aspect of the present disclosure, CSI reporting to a plurality of transmission points can be appropriately performed.

Description

The present disclosure relates to user terminals and wireless communication methods in next-generation mobile communication systems.

In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified 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 and 9).

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

In an existing LTE system (eg, LTE Rel. 8-14), the user terminal (User Equipment (UE)) has downlink control information transmitted via a downlink control channel (eg, Physical Downlink Control Channel (PDCCH)). Based on (also referred to as Downlink Control Information (DCI), DL assignment, etc.), reception of a downlink shared channel (for example, 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 an existing LTE system (eg, LTE Rel. 8-13), a user terminal (User Equipment (UE)) periodically and / or aperiodically refers to a channel state information (Channel State Information) with respect to a base station. CSI)) is sent. The UE transmits a 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 (for example, NR), transmission using a plurality of transmission points (transmission / reception points, panels, etc.) is being studied.

However, the channel state information (CSI) differs among the plurality of transmission points. If CSI reporting to multiple transmission points is not done properly, the communication quality may deteriorate.

Therefore, one of the purposes of the present disclosure is to provide a user terminal and a wireless communication method for appropriately reporting CSI to a plurality of transmission points.

The user terminal according to one aspect of the present disclosure receives setting information regarding a plurality of channel state information (CSI) reports corresponding to a plurality of transmission points, and receives at least one instruction regarding the plurality of CSI reports. And a control unit that performs the plurality of CSI reports based on the at least one instruction.

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

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

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

Further, in the present disclosure, the transmission point may be read as a transmission / reception point (TRP), a panel (panel, an antenna panel, a plurality of antenna elements), an antenna, an antenna port, or a cell. Transmission points (TRPs, panels, etc.) can be, for example, beams, spatial filters, Reference Signal (RS) resources, Quasi Co-Location (QCL), Transmission Configuration Indication (TCI), or them. Can be replaced with a grouped concept.

It is also envisioned that the scheduling of non-coherent PDSCHs transmitted from multiple transmission points will be 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 utilized to schedule PDSCHs transmitted from the plurality of transmission points.

In this case, it is also conceivable to allocate PDSCHs transmitted from different transmission points to the same resource (for example, time and frequency resources) for transmission. 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 (corresponding to CW # 1) transmitted from the first transmission point uses at least one of layers 1 and 2, and corresponds to the PDSCH (corresponding to CW # 1) transmitted from the second transmission point. ) Is allocated to the same time and frequency resource using at least one of layers 3 and 4.

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

Further, as shown in FIG. 1C, in multiple TRP transmissions, a plurality of PDSCHs may be transmitted in different Multiple Input Multiple Output (MIMO) layers. Further, the time resource and the frequency resource of a plurality of PDSCHs may overlap.

The UE may set communication using a plurality of TRPs (for example, transmission of a plurality of TRPs) by higher layer signaling (setting information). The UE may be notified of information (at least one of higher layer signaling and DCI) indicating the allocation of a plurality of resources corresponding to the plurality of TRPs for communication using the plurality of TRPs.

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

(BWP)
Future wireless communication systems (eg, NR, 5G or 5G +) will have a wider bandwidth (eg, 100-800 MHz) than existing LTE systems (eg, LTE Rel. 8-13) (Component Carrier: CC), also called cell or system bandwidth) is being considered.

On the other hand, in the future wireless communication system, a user terminal (also referred to as Wideband (WB) UE, single carrier WB UE, etc.) having a capability of transmitting and / or receiving (transmitting / receiving) in the entire carrier and the carrier. It is assumed that user terminals (also called Bandwidth (BW) reduced UE, etc.) that do not have the ability to send and receive as a whole will coexist.

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), so one or more partial frequency bands will be quasi-static in the carrier. It is being considered to configure it. Each frequency band (for example, 50 MHz or 200 MHz) in the carrier is referred to as a partial band or a bandwidth part (BWP) or the like.

BWP activation or deactivation may be controlled. Here, the activation of the BWP means that the BWP is in a usable state (or transitions to the available state), and the BWP configuration information (configuration) (BWP setting information) is activated or Also called activation. Further, deactivating the BWP means that the BWP is in an unusable state (or transitions to the unusable state), and is also referred to as deactivating or invalidating the BWP setting information. By scheduling the BWP, this BWP will be activated. Also, activation or deactivation of at least one of the plurality of BWPs may be controlled.

(Resource setting and reporting setting)
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 reporting configuration) for the CSI. It is stipulated.

For example, as shown in FIG. 2, the UE may set resource settings # 0, # 1, # 2 by a higher layer parameter (for example, CSI-ResourceConfig). Each resource setting may include a plurality of 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 set a plurality of report settings # 0 and # 1 by a higher layer parameter (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, as CSI-RS (CSI-RS resource) settings, periodic CSI-RS (P-CSI-RS), semi-persistent (semi-persistent) CSI-RS (SP-CSI-RS) ), Aperiodic CSI-RS (A-CSI-RS), are supported.

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

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

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. May be good.

When P-CSI-RS is set as the CSI-RS setting, P-CSI reporting, SP-CSI reporting on PUCCH, SP-CSI reporting on PUSCH, and A-CSI reporting are supported. The P-CSI report is set by the RRC parameter and the UE does not receive dynamic triggering or activation.

For SP-CSI reporting, the UE receives an activation command for reporting on PUCCH by MAC CE or a trigger on DCI for reporting on PUSCH. The DCI is subjected to a cyclic redundancy check by a radio network temporary identifier (RNTI) for SP-CSI reporting (for example, SP-CSI-RNTI, SP-CSI C-RNTI (SP-CSI Cell-RNTI)). The (Cyclic Redundancy Check: CRC) bit may be a masked (scrambled) DCI. The UE stops SP-CSI-RS measurement and SP-CSI reporting when a given deactivation (release) signal is received or when a given timer initiated by an activation command (trigger) expires. You may.

A-CSI reporting is triggered by DCI. A-CSI reports may use activation commands.

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

If A-CSI-RS is set as the CSI-RS setting, A-CSI reporting is supported.

In communication using a plurality of TRPs, different CSIs are required for different TRPs. However, Rel. In No. 15, since the CSI for one TRP is specified, it is not clear how to report and set the CSI for the plurality of TRPs in the communication using the plurality of TRPs.

Therefore, the present inventors conceived the operation of a plurality of CSI reporting settings (for example, resource setting, reporting setting) or instructions (for example, activation, deactivation, or trigger) corresponding to each of the plurality of transmission points. bottom.

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 individually or in combination.

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

For MAC signaling, for example, a MAC control element (CE), a MAC Protocol Data Unit (PDU), or the like may be used. The broadcast information includes, for example, a master information block (MIB), a system information block (SIB), a minimum system information (RMSI), and other system information (Other System Information). : OSI) and the like.

In the present disclosure, TRP, transmission point, DMRS port group, MIMO layer, panel, cell, carrier, component carrier (CC), PDSCH, codeword, base station, beam, and the like may be read as each other.

New information such as new DCI fields, new RNTI, etc. is specified in a particular release (eg, Rel. 16 or later) and not in a release earlier than the particular release (eg, Rel. 15). It may be read as information.

(Wireless communication method)
<Embodiment 1>
The UE may be configured with a plurality of CSI reports (reporting settings) corresponding to each of the plurality of TRPs.

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

The UE may set 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 resource setting # 0, # 2 for TRP # 0. May be associated with.

Similarly, the UE may set 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 resource setting # 0, # 2 for TRP # 1. May be associated with.

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

<< Embodiment 1-1 >>
The UE may receive a plurality of PDCCHs from each of the plurality of TRPs. The PDCCH from each TRP may schedule the corresponding data (one PUSCH transmitted to the corresponding TRP or one PDSCH transmitted from the corresponding TRP).

For example, as shown in FIG. 5D, TRP # 0 transmits DCI # 1 that schedules PDSCH, and TRP # 1 transmits DCI # 2 that schedules PDSCH (mode, type, etc.). May be good. DCI # 2 may be transmitted in the same slot as DCI # 1.

The UE may be set by a higher layer parameter to receive a plurality of PDCCHs from a plurality of TRPs, respectively.

The UE may trigger, activate, or deactivate the corresponding CSI report by 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 DCI or MAC CE (the corresponding CSI reporting triggers). , Activated, or deactivated).

According to the above embodiment 1-2, at least one of activation, deactivation, and trigger can be appropriately performed for a plurality of CSI reports corresponding to a plurality of TRPs. Further, by sending an instruction corresponding to each of the plurality of TRPs, at least one of activation, deactivation, and trigger can be flexibly performed.

<< Embodiment 1-2 >>
The UE may receive PDCCH from one of a plurality of TRPs. The PDCCH may schedule a plurality of data corresponding to each of the plurality of TRPs (a plurality of PUSCHs transmitted to each of the plurality of TRPs, or a plurality of PDSCHs transmitted from each of the plurality of TRPs).

For example, as shown in FIG. 5A, TRP # 0 may transmit DCI, and the DCI may schedule data corresponding to TRP # 0. Further, as shown in FIG. 5B, TRP # 0 may transmit DCI, and the DCI may schedule 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 be the case of scheduling two data. DCI part 2 may depend on DCI part 1. The DCI part 1 may include auxiliary information for decoding the DCI part 2. DCI part 2 may be transmitted in the same slot as DCI part 1.

The UE may trigger, activate, or deactivate CSI reporting according to at least one of the following embodiments 1-2-1 to 1-2-3 (CSI reporting is triggered, activated, or deactivated). May be considered).

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

The UE may activate SP-CSI reporting on the PUCCH according to at least one of the following options 1a and 1b.

<<<< Option 1a >>
The UE may independently activate multiple CSI reports corresponding to each of the multiple TRPs. The UE may activate the CSI reporting index by the corresponding MAC CE. The MAC CE may be transmitted from the corresponding TRP (using the corresponding DMRS port group).

The UE may feed back X CSIs if each of the X MAC CEs activates X CSI reports.

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

<<<< Option 1b >>
The UE may collectively activate a plurality of CSI reports corresponding to a plurality of TRPs. The UE may activate CSI reporting by one MAC CE from one TRP.

When the UE is configured with a CSI-RS resource (eg, SP-CSI-RS resource) as part of a plurality of TRPs (for example, when the CSI-RS resource is not configured for at least one TRP), the UE is CSI. -The SP-CSI report corresponding only to the TRP configured with RS resources may be activated.

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

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

<<<< Option 2a >>
The UE may independently deactivate multiple CSI reports corresponding to each of the 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 collectively deactivate a plurality of CSI reports corresponding to a plurality of TRPs. The UE may deactivate all SP-CSI reports if at least one of the BWPs is modified while the SP-CSI reports are activated.

<<<< Option 2c >>>>
The UE may collectively deactivate a plurality of CSI reports corresponding to a plurality of TRPs. The UE may deactivate all CSI reports by one MAC CE from one TRP. If the SP-CSI report for one TRP is deactivated while the SP-CSI report for the two TRPs is activated, the UE may also deactivate the SP-CSI report for the other TRP.

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

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

Rel. At 15, the size (length) of the CSI request field in the DCI is defined by the upper layer parameter reportTriggerSize as one of 0, 1, 2, 3, 4, 5, and 6 bits. In order to independently activate the CSI reports corresponding to the two TRPs, the size (length) of the CSI request field is 0,2,4,6,8,10,12 depending on the upper layer parameter (eg reportTriggerSize). It may be defined in any of the bits.

<<<< Option 1b >>
The UE may collectively activate a plurality of CSI reports corresponding to a plurality of TRPs. The UE may activate a plurality of CSI reports corresponding to a plurality of TRPs by the same DCI (for example, an existing DCI field, a CSI request field). The CSI request field or CRC of the DCI may be scrambled by a specific RNTI (eg, SP-CSI-RNTI, new RNTI).

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

<<<< Option 2a >>
The UE may independently deactivate multiple CSI reports corresponding to each of the TRPs. The UE may deactivate the SP-CSI report 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 collectively deactivate a plurality of CSI reports corresponding to a plurality of TRPs. The UE may deactivate all SP-CSI reports if at least one of the BWPs is modified while the SP-CSI reports are activated.

<<<< Option 2c >>>>
The UE may collectively deactivate a plurality of CSI reports corresponding to a plurality of TRPs. The UE may deactivate all CSI reports by one PDCCH from one TRP. If the SP-CSI report for one TRP is deactivated while the SP-CSI report for the two TRPs is activated, the UE may also deactivate the SP-CSI report for the other TRP.

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

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

Rel. At 15, the size (length) of the CSI request is defined by the upper layer parameter reportTriggerSize as one of 0, 1, 2, 3, 4, 5, and 6 bits. In order to independently activate the CSI reports corresponding to the two TRPs, the size (length) of the CSI request is 0,2,4,6,8,10,12 bits depending on the upper layer parameter (eg reportTriggerSize). It may be defined as one of.

<<<< Option 2 >>
The UE may collectively trigger a plurality of CSI reports corresponding to a plurality of TRPs. The UE may trigger multiple CSI reports for multiple TRPs by the same DCI (eg, existing DCI fields, CSI request fields). The CSI request field or CRC of the DCI may be scrambled by a specific RNTI (eg, SP-CSI-RNTI, new RNTI).

According to the above embodiment 1-2, at least one of activation, deactivation, and trigger can be appropriately performed for a plurality of CSI reports corresponding to a plurality of TRPs. Further, since at least one of activation, deactivation, and trigger is performed by using one PDCCH or MAC CE, the overhead of signaling 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 the CSI-RS resource setting and the reporting setting, as shown in FIG.

In addition, the UE may use mappings between different reporting settings, as shown in FIG.

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

The UE may set the mapping according to at least one of the following embodiments 2-1 and 2-2.

According to the above embodiment 2-1 the UE can use the mapping to determine the reporting setting for at least one TRP. In addition, since it is not necessary 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 activate the reporting setting by at least one of the following options 1 and 2. The UE may similarly deactivate or trigger the reporting settings.

<<<< Option 1 >>
The same reporting setting IDs may be associated with each other between different TRPs.

When the UE activates the report setting # X of TRP # i, the report setting # X (same report setting ID) of TRP # j may also be activated.

<<<< Option 2 >>
Report setting IDs between different TRPs may be associated by a particular formula.

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

<< Embodiment 2-2 >>
The UE may use an explicit mapping between reporting settings for different TRPs.

The UE may set the mapping between multiple reporting settings with higher layer parameters. When the UE receives at least one instruction of activation, deactivation, or trigger of one reporting setting of multiple TRPs, it is based on the mapping to the reporting settings of the other TRPs associated with that reporting setting. On the other hand, the same instruction may be applied.

For example, as shown in FIG. 7, the upper layer parameter (RRC information element, for example, CSI-MeasConfig) of the report setting for the case where a plurality of TRPs are used indicates the information indicating the mapping of the report setting (for example, L1 (layer 1, layer 1,). A list of trigger states for SP-CSI reporting in DCI), CSI-SemiPersistentOnPUSCH-TriggerStateList) may be included. This list may indicate the IDs of other TRP reporting settings (CSI reporting settings) associated with the reporting mapping (eg, CSI-SemiPersistentOnPUSCH-TriggerState, CSI-ReportConfigId).

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 the above embodiment 2-2, the UE can use the mapping to determine the reporting setting for at least one TRP. In addition, the mapping can be set flexibly.

(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 of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.

FIG. 8 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 using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). ..

Further, the radio communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). MR-DC is a dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and a dual connectivity (NR-E) between NR and LTE. -UTRA Dual Connectivity (NE-DC)) and the like may be included.

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

The wireless communication system 1 has dual connectivity (for example, NR-NR Dual Connectivity (NN-DC)) in which dual connectivity (for example, both MN and SN are NR base stations (gNB)) between a plurality of base stations in the same RAT. )) May be supported.

The wireless communication system 1 includes a base station 11 that forms a macrocell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macrocell C1 and forms a small cell C2 that is narrower than the macrocell C1. You may prepare. The user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode 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 (CA) and dual connectivity (DC) using a plurality of component carriers (Component Carriers (CC)).

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)). The macrocell 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 FR 2 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.

Further, the user terminal 20 may perform communication 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, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is 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, for example, at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

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

In the wireless communication system 1, a wireless access system based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, 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), and the like may be used.

The wireless access method may be referred to as a waveform. In the wireless communication system 1, another wireless access system (for example, another single carrier transmission system, another multi-carrier transmission system) may be used as the UL and DL wireless access systems.

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

Further, in the wireless communication system 1, as the uplink channel, the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), and the random access channel shared by each user terminal 20 are used. (Physical Random Access Channel (PRACH)) and 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. Further, the Master Information Block (MIB) may be transmitted by PBCH.

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

The DCI that schedules PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI that schedules PUSCH may be referred to as UL grant, UL DCI, or the like. The PDSCH may be read as DL data, and the PUSCH may be read as UL data.

A control resource set (COntrol REsource SET (CORESET)) and a search space may be used for PDCCH detection. CORESET corresponds to a resource for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the 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. 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 (CSI), delivery confirmation information (eg, may be referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.) and Scheduling Request (Scheduling Request). Uplink Control Information (UCI) containing at least one of SR)) may be transmitted. The PRACH may transmit a random access preamble for establishing a connection with the cell.

In this disclosure, downlinks, uplinks, etc. may be expressed without "links". Further, it may be expressed without adding "Physical" to the beginning of various channels.

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), or 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 (Phase Tracking Reference Signal (PTRS)), and the like 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). The signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like. In addition, SS, SSB and the like may also be called a reference signal.

Further, in the wireless communication system 1, even if a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), or the like is transmitted as an uplink reference signal (UL-RS). good. The DMRS may be referred to as a user terminal specific reference signal.

(base station)
FIG. 9 is a diagram showing 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. The control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.

In this example, the functional block of the feature portion in the present embodiment is 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 part described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like described based on the 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, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the 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, management of radio resources, 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 transmitter / receiver 120 includes 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 the common recognition in the technical field according to the present disclosure. be able to.

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

The transmitting / receiving antenna 130 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.

The transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 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), and the like.

The transmission / reception unit 120 (transmission processing unit 1211) processes, for example, the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer (for example, for data, control information, etc. acquired from the control unit 110). RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), and the like 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 (DFT) for the bit string to be transmitted. The baseband signal may be output by performing processing (if necessary), transmission processing such as Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog transformation.

The transmission / reception unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band 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, and the like 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 transform, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) for the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.

The transmission / reception unit 120 (measurement unit 123) may perform measurement on the received signal. For example, the measuring unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal. The measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)). , Signal strength (eg, Received Signal Strength Indicator (RSSI)), propagation path information (eg, CSI), and the like 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 a device included in the core network 30, another base station 10, etc., and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.

The transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120 and the transmission / reception antenna 130.

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

(User terminal)
FIG. 10 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. The control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.

In this example, the functional block of the feature portion in the present embodiment is mainly shown, 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 part described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like described based on the 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, and the like, 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 can be composed of 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 the common recognition in the technical field according to the present disclosure.

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

The transmitting / receiving antenna 230 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.

The transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitter / receiver 220 may form at least one of a transmit beam and a receive beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), and the like.

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

The transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.

Whether or not to apply the DFT process may be based on the transform precoding setting. When the transform precoding is enabled for a channel (for example, PUSCH), the transmission / reception unit 220 (transmission processing unit 2211) transmits the channel using the DFT-s-OFDM waveform. The DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.

The transmission / reception unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band 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, and the like 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-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.

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

The transmission unit and the reception unit of the user terminal 20 in the present disclosure may be composed of at least one of the transmission / reception unit 220, the transmission / reception antenna 230, and the transmission path interface 240.

Further, the transmission / reception unit 220 has a plurality of channel state information (CSI) reports (for example, SP-CSI report on PUCCH, SP-CSI report on PUSCH, A-) corresponding to each of a plurality of transmission points (for example, TRP). Receives configuration information (eg, resource settings, report settings) for CSI reports, etc., and receives at least one instruction (eg, activation, deactivation, trigger, MAC CE, DCI, etc.) for the plurality of CSI reports. You may. The control unit 210 may make the plurality of CSI reports based on the at least one instruction.

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

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

Further, the control unit 210 responds to the instruction of the CSI report corresponding to the first transmission point (for example, TRP # 0, TRP # i), and receives the CSI report corresponding to the first transmission point and the second transmission point (for example, TRP # i). For example, a CSI report corresponding to TRP # 1 and TRP # j) may be performed (Embodiment 2-1).

Further, the transmission / reception unit 220 has a first setting of the CSI report corresponding to the first transmission point (for example, a report setting and a CSI report setting) and a second setting of the CSI report corresponding to the second transmission point (for example, a report setting). , CSI report setting) and the association (mapping), 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)
The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

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

For example, the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 11 is a diagram showing an example of the 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. ..

In addition, in this disclosure, the wording of a device, a circuit, a device, a section, a unit and the like can be read as each other. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors. 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 loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), and the like 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 a part of the operations described in the above-described embodiment 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 in the same manner for other functional blocks.

The memory 1002 is a computer-readable recording medium, eg, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy disk (registered trademark) disk, an optical magnetic disk (for example, a compact disc ROM (CD-ROM), etc.), a digital versatile disk, and the like. At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. May be configured by. The storage 1003 may be referred to as 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 may include, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, or the like in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). May be configured to include. For example, the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be physically or logically separated by the transmission unit 120a (220a) and the reception unit 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 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 by using a single bus, or may be configured by using a different bus for each device.

Further, 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 a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Modification example)
The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols and signals (signals or signaling) may be read interchangeably. Also, the signal may 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. Further, the component carrier (CC) may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

The radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe. Further, the subframe may be composed of one or more slots in the time domain. The 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 signal or channel. Numerology is, 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, radio frame configuration. , A specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

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

The slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini-slot may be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. The PDSCH (or PUSCH) transmitted in time units larger than the 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.

Wireless frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. The radio frame, subframe, slot, minislot and symbol may use different names corresponding to each. The time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read as each other.

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

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

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

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as 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, and the like. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots and the like.

The long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (eg, shortened TTI, etc.) may be read as a TTI less than the TTI length of the long TTI and 1 ms. It may be read as 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 consecutive subcarriers in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

The RB may also include one or more symbols in the time domain and may be one slot, one minislot, one subframe or one TTI in length. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

In addition, one or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.

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

Bandwidth Part (BWP) (may be referred to as partial bandwidth, etc.) represents a subset of common resource blocks (RBs) for a neurology in a carrier. May be good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

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

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

The above-mentioned structures such as a wireless frame, a subframe, a slot, a minislot, and a symbol are merely examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radioframe, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB. The number of subcarriers and the configuration such as the number of symbols in TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

Further, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It 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 in any respect. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed in the present disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way. ..

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

Further, information, signals and the like can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers. Information, signals, etc. may be input / output via a plurality of network nodes.

The input / output information, signals, and the like may be stored in a specific place (for example, a memory) or may be managed by using a management table. Input / output information, signals, etc. 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.

The notification of information is not limited to the embodiments / embodiments described in the present disclosure, and may be performed by other methods. For example, the information notification in the present disclosure includes physical layer signaling (eg, Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (eg, Radio Resource Control). (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof. May be carried out by.

The physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Further, the RRC signaling may be referred to as 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).

In addition, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).

The determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).

Software, whether called software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information and the like may be transmitted and received via a transmission medium. For example, the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.) on the website. When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

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

In the present disclosure, "precoding", "precoder", "weight (precoding weight)", "pseudo-colocation (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", "panel" are compatible. Can be used for

In the present disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel" , "Cell", "sector", "cell group", "carrier", "component carrier" and the like may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (eg, 3) 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 a base station subsystem (eg, a remote radio for indoor use). Communication services can also be provided by Head (RRH))). The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and a 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.

Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.

At least one of a base station and a mobile station may be referred to as a transmitting device, a receiving device, a wireless communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, a 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 or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the user terminal 20 may have the function of the base station 10 described above. Further, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

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

In the present disclosure, the operation performed by the base station may be performed by its upper node (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 are a base station, one or more network nodes other than the base station (for example,). Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. are conceivable, but it is clear that it can be done by (but not limited to) or a combination thereof.

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the order of the processing procedures, sequences, flowcharts, 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 the present disclosure present elements of various steps using exemplary order, and are not limited to the particular 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®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), LTE 802.16 (WiMAX®), LTE 802. 20, Ultra-WideBand (UWB), Bluetooth®, other systems utilizing appropriate wireless communication methods, next-generation systems extended based on these, and the like may be applied. Further, a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

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

Any reference to elements using designations such as "first" and "second" as used in the present disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present 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 adopted or that the first element must somehow precede the second element.

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

Further, "judgment (decision)" includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as "determining" such as accessing) (for example, accessing data in memory).

In addition, "judgment (decision)" is regarded as "judgment (decision)" of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, "judgment (decision)" may be regarded as "judgment (decision)" of some action.

Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

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

The terms "connected", "coupled", or any variation thereof, as used in the present disclosure, are any direct or indirect connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are "connected" or "bonded" to each other. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access".

In the present disclosure, when two elements are connected, one or more wires, cables, printed electrical connections, etc. are used, and as some non-limiting and non-comprehensive examples, the radio frequency domain, microwaves. It can be considered to be "connected" or "coupled" to each other using frequency, electromagnetic energy having wavelengths in the region, light (both visible and invisible) regions, and the like.

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". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

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

In the present disclosure, if articles are added by translation, for example a, an and the in English, the disclosure may include the plural nouns following these articles.

Although the invention according to the present disclosure has been described in detail above, it is clear 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 an amended or modified mode without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for purposes of illustration and does not bring any limiting meaning to the invention according to the present disclosure.

Claims (6)

A receiver that receives configuration information for a plurality of channel state information (CSI) reports corresponding to a plurality of transmission points, and receives at least one instruction regarding the plurality of CSI reports.
A user terminal comprising: a control unit that performs the plurality of CSI reports based on the at least one instruction. The receiving unit receives the plurality of instructions from the plurality of transmitting points, respectively, and receives the plurality of instructions.
The user terminal according to claim 1, wherein the control unit performs a corresponding CSI report based on each of the plurality of instructions. The receiver receives one instruction regarding the plurality of CSI reports from one of the plurality of transmission points.
The user 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 it performs a CSI report corresponding to the first transmission point and a CSI report corresponding to the second transmission point in response to an instruction regarding the CSI report corresponding to the first transmission point. The user terminal according to claim 1. The receiving unit receives the association between the first setting of the CSI report corresponding to the first transmission point and the second setting of the CSI report corresponding to the second transmission point.
The user terminal according to claim 1 or 4, wherein the control unit determines at least one of the first setting and the second setting based on the association. A step of receiving configuration information regarding a plurality of channel state information (CSI) reports corresponding to a plurality of transmission points, and receiving at least one instruction regarding the plurality of CSI reports.
A method for wireless communication of a user terminal, which comprises a step of performing the plurality of CSI reports based on the at least one instruction.

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