WO2024009463A1

WO2024009463A1 - Terminal, wireless communication method and base station

Info

Publication number: WO2024009463A1
Application number: PCT/JP2022/026993
Authority: WO
Inventors: 祐輝松村; 聡永田; ジンワン
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2024-01-11

Abstract

A terminal according to an aspect of the present disclosure comprises: a reception unit that receives a configuration parameter related to a unified Transmission Configuration Indication (TCI) state, and that also receives an indication related to the unified TCI state as well as downlink control information (DCI) for scheduling or triggering a downlink (DL) signal; and a control unit that, if control resource set (CORESET) pool indexes of a plurality of values are set and the value of a period from reception of the DCI to reception of the DL signal is smaller than a threshold value, determines a TCI state or a Quasi-Co-Location (QCL) assumption that is applied to the particular DL signal, on the basis of a TCI state or a QCL assumption associated with a particular one of the CORESET pool indexes. According to an aspect of the present disclosure, application of a TCI state can be appropriately performed.

Description

Terminal, wireless communication method and base station

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

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

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

In future wireless communication systems (e.g. NR), user terminals (terminals, user terminals, User Equipment (UE)) will receive information about quasi-co-location (QCL) (QCL assumption/Transmission Configuration Indication). Controlling transmission and reception processing based on TCI (state/spatial relationship) is being considered.

Application of set/activated/instructed TCI states to multiple types of signals (channels/RSs) is being considered. However, there are cases where it is not clear how to indicate the TCI status. If the method of indicating the TCI status is not clear, there is a risk of deterioration in communication quality, throughput, etc.

Therefore, one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately apply TCI states.

A terminal according to an aspect of the present disclosure receives configuration parameters related to a unified transmission configuration indication (TCI) state, and includes instructions regarding the unified TCI state and downlink control information (DL) for scheduling or triggering a downlink (DL) signal. DCI) and a control resource set (CORESET) pool index of multiple values is set, and the value of the period from reception of the DCI to reception of the DL signal is less than the threshold value. and a control unit that determines a TCI state or QCL assumption to be applied to the specific DL signal, based on a TCI state or pseudo-colocation (QCL assumption) corresponding to the specific CORESET pool index.

According to one aspect of the present disclosure, it is possible to appropriately apply the TCI state.

1A to 1C are diagrams illustrating examples of schemes 0 to 2 regarding SFN. FIG. 2 is a diagram illustrating an example of simultaneous beam updating across multiple CCs. 3A and 3B are diagrams illustrating an example of a common beam. FIGS. 4A and 4B are diagrams illustrating examples of single DCI-based multi-TRP transmission and multi-DCI-based multi-TRP transmission, respectively. 5A and 5B are diagrams illustrating an example of the TCI field within the DCI. 6A and 6B are diagrams illustrating an example of setting/instructing a joint TCI state in a single DCI-based multi-TRP. FIGS. 7A and 7B are diagrams illustrating an example of setting/instructing a separate TCI state in a single DCI-based multi-TRP. FIGS. 8A and 8B are diagrams illustrating an example of setting/instructing a joint TCI state corresponding to a first value of the CORESET pool index in a multi-DCI-based multi-TRP. 9A and 9B are diagrams illustrating an example of setting/instructing a joint TCI state corresponding to a second value of the CORESET pool index in a multi-DCI-based multi-TRP. FIG. 10 is a diagram showing an overview of UE operations according to the first to fifth embodiments. FIGS. 11A and 11B are diagrams illustrating an example of a method for selecting a TCI code point when a joint/DL TCI state is indicated. FIG. 12 is a diagram illustrating an example of application of TCI status according to option 5-1-1. FIG. 13 is a diagram illustrating an example of settings according to the sixth embodiment. FIG. 14 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 15 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 16 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 17 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 18 is a diagram illustrating an example of a vehicle according to an embodiment.

(TCI, spatial relations, QCL)
In NR, the UE performs reception processing (e.g. reception, demapping, demodulation, Controlling at least one of decoding), transmission processing (eg, at least one of transmission, mapping, precoding, modulation, and encoding) is being considered.

The TCI states may represent those that apply to downlink signals/channels. What corresponds to the TCI state applied to uplink signals/channels may be expressed as a spatial relation.

The TCI state is information regarding quasi-co-location (QCL) of signals/channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI state may be set in the UE on a per-channel or per-signal basis.

QCL is an index that indicates the statistical properties of a signal/channel. For example, when one signal/channel and another signal/channel have a QCL relationship, the Doppler shift, Doppler spread, and average delay are calculated between these different signals/channels. ), delay spread, and spatial parameters (e.g., spatial Rx parameters) can be assumed to be the same (QCL with respect to at least one of these). You may.

Note that the spatial reception parameters may correspond to the UE's reception beam (eg, reception analog beam), and the beam may be identified based on the spatial QCL. QCL (or at least one element of QCL) in the present disclosure may be read as sQCL (spatial QCL).

A plurality of types (QCL types) may be defined for QCL. For example, four QCL types A-D may be provided with different parameters (or parameter sets) that can be assumed to be the same, and the parameters (which may be referred to as QCL parameters) are shown below:
・QCL type A (QCL-A): Doppler shift, Doppler spread, average delay and delay spread,
・QCL type B (QCL-B): Doppler shift and Doppler spread,
・QCL type C (QCL-C): Doppler shift and average delay,
- QCL type D (QCL-D): Spatial reception parameters.

For the UE to assume that one Control Resource Set (CORESET), channel or reference signal is in a particular QCL (e.g. QCL type D) relationship with another CORESET, channel or reference signal, It may also be called a QCL assumption.

The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for the signal/channel based on the TCI state or QCL assumption of the signal/channel.

The TCI state may be, for example, information regarding the QCL between a target channel (in other words, a reference signal (RS) for the channel) and another signal (for example, another RS). . The TCI state may be set (indicated) by upper layer signaling, physical layer signaling, or a combination thereof.

The physical layer signaling may be, for example, downlink control information (DCI).

Channels for which TCI states or spatial relationships are set (specified) are, for example, Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), and Uplink Shared Channel (Physical Uplink Shared Channel). The channel may be at least one of a physical uplink control channel (PUCCH) and a physical uplink control channel (PUCCH).

In addition, the RS that has a QCL relationship with the channel is, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a measurement reference signal (Sounding The signal may be at least one of a tracking reference signal (SRS), a tracking CSI-RS (also referred to as a tracking reference signal (TRS)), and a QCL detection reference signal (also referred to as a QRS).

The SSB is a signal block that includes at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). SSB may be called SS/PBCH block.

An RS of QCL type X in a TCI state may mean an RS that has a QCL type You can.

QCL type A RS is always set for PDCCH and PDSCH, and QCL type D RS may be additionally set. Since it is difficult to estimate Doppler shift, delay, etc. by receiving one shot of DMRS, QCL type A RS is used to improve channel estimation accuracy. QCL type D RS is used for receiving beam determination during DMRS reception.

For example, TRS1-1, 1-2, 1-3, and 1-4 are transmitted, and TRS1-1 is notified as a QCL type C/D RS depending on the TCI state of the PDSCH. By being notified of the TCI state, the UE can use information obtained from past periodic TRS1-1 reception/measurement results for PDSCH DMRS reception/channel estimation. In this case, the QCL source for PDSCH is TRS1-1, and the QCL target is DMRS for PDSCH.

(Default TCI state/default spatial relationship/default PL-RS)
Rel. At 16, the PDSCH may be scheduled with a DCI having a TCI field. The TCI state for PDSCH is indicated by the TCI field. The TCI field of DCI format 1_1 is 3 bits, and the TCI field of DCI format 1_2 is 3 bits at maximum.

In RRC connected mode, if the first intra-DCI TCI information element (upper layer parameter tci-PresentInDCI) is set to "enabled" for a CORESET that schedules a PDSCH, the UE shall It is assumed that a TCI field exists in the DCI format 1_1 of the transmitted PDCCH.

Additionally, if the second in-DCI TCI information element (upper layer parameter tci-PresentInDCI-1-2) for a CORESET that schedules a PDSCH is set in the UE, the UE can determine the DCI format of the PDSCH transmitted in the CORESET. Assume that there is a TCI field in DCI 1_2 with the DCI field size indicated by the second intra-DCI TCI information element.

Also, Rel. At 16, the PDSCH may be scheduled with a DCI without a TCI field. The DCI format of the DCI is DCI format 1_0, or DCI format 1_1/1_2 in the case where the intra-DCI TCI information element (upper layer parameter tci-PresentInDCI or tci-PresentInDCI-1-2) is not set (enabled). You can. If a PDSCH is scheduled with a DCI that does not have a TCI field, and if the DL is greater than or equal to a threshold (timeDurationForQCL), the UE assumes that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption (default TCI state) of the CORESET (e.g., scheduling DCI). .

In RRC connection mode, there are cases where the intra-DCI TCI information element (upper layer parameters tci-PresentInDCI and tci-PresentInDCI-1-2) is set to "enabled" and cases where the intra-DCI TCI information element is not set. , if the time offset between the reception of the DL DCI (the DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH that is scheduled by the DCI) is smaller than the threshold (timeDurationForQCL) (applicable condition, 1st condition), if non-cross-carrier scheduling, the TCI state (default TCI state) of the PDSCH is the TCI state of the lowest CORESET ID in the latest slot in the active DL BWP of that CC (of a specific UL signal). It may be. Otherwise, the TCI state of the PDSCH (default TCI state) may be the TCI state of the lowest TCI state ID of the PDSCH in the active DL BWP of the scheduled CC.

Rel. In 15, individual MAC CEs are required: a MAC CE for activation/deactivation related to PUCCH space and a MAC CE for activation/deactivation related to SRS space. PUSCH spatial relationships follow SRS spatial relationships.

Rel. In No. 16, at least one of the MAC CE for activation/deactivation related to PUCCH space and the MAC CE for activation/deactivation related to SRS space may not be used.

If both the spatial relationship and PL-RS for PUCCH are not configured in FR2 (applicable condition, second condition), default assumption of spatial relationship and PL-RS for PUCCH (default spatial relationship and default PL-RS) applies. If in FR2, both the spatial relationship for SRS (SRS resource for SRS, or SRS resource corresponding to SRI in DCI format 0_1 that schedules PUSCH) and PL-RS are not configured (applicable condition, second condition), Default assumptions of spatial relationship and PL-RS (default spatial relationship and default PL-RS) apply for PUSCH and SRS scheduled by DCI format 0_1.

If a CORESET is set in the active DL BWP on that CC (applicable condition), the default spatial relationship and default PL-RS are based on the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in the active DL BWP. There may be. If no CORESET is configured in the active DL BWP on that CC, the default spatial relationship and default PL-RS may be the active TCI state with the lowest ID of the PDSCH in the active DL BWP.

Rel. In 15, the spatial relationship of PUSCH scheduled by DCI format 0_0 follows the spatial relationship of the PUCCH resource with the lowest PUCCH resource ID among the active spatial relationships of PUCCH on the same CC. The network needs to update the PUCCH spatial relationships on all SCells even if no PUCCH is transmitted on the SCell.

Rel. In 16, no PUCCH configuration is required for PUSCH scheduled by DCI format 0_0. For a PUSCH scheduled by DCI format 0_0, if there is no active PUCCH spatial relationship or no PUCCH resource on the active UL BWP in that CC (applicable condition, second condition), the default spatial relationship and Default PL-RS is applied.

The application conditions for the default spatial relationship/default PL-RS for SRS may include that the default beam path loss enable information element for SRS (upper layer parameter enableDefaultBeamPlForSRS) is set to valid. The application condition of the default spatial relationship/default PL-RS for PUCCH may include that the default beam path loss enable information element for PUCCH (upper layer parameter enableDefaultBeamPlForPUCCH) is set to valid. The application condition for the default spatial relationship/default PL-RS for PUSCH scheduled by DCI format 0_0 is that the default beam path loss enable information element for PUSCH scheduled by DCI format 0_0 (upper layer parameter enableDefaultBeamPlForPUSCH0_0) is set to valid. It may also include.

Rel. 16, the RRC parameter (parameter for enabling default beam PL for PUCCH (enableDefaultBeamPL-ForPUCCH), parameter for enabling default beam PL for PUSCH (enableDefaultBeamPL-ForPUSCH0_0)), or SRS If the parameter (enableDefaultBeamPL-ForSRS) is configured and no spatial relationship or PL-RS is configured, the UE applies the default spatial relationship/PL-RS.

The above thresholds are: time duration for QCL, "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold- "Sched-Offset", " beamSwitchTiming, schedule offset threshold, scheduling offset threshold, etc. The threshold may be reported by the UE as the UE capability (per subcarrier interval).

The offset (scheduling offset) between the reception of DL DCI and the corresponding PDSCH is smaller than the threshold timeDurationForQCL, and at least one TCI state configured for the serving cell of the scheduled PDSCH is "QCL type D" and the UE is configured with two default TCI enable information elements (enableTwoDefaultTCIStates-r16) and at least one TCI code point (code point of the TCI field in the DL DCI) indicates two TCI states. The DMRS port of the serving cell's PDSCH or PDSCH transmission occasion is QCLed with the RS with respect to the QCL parameters associated with the two TCI states corresponding to the lowest code point of the TCI code points containing the two different TCI states ( quasi co-located) (2 default QCL assumption decision rule). 2 Default TCI Enablement Information Element indicates the Rel. 16 operation is enabled.

Rel. As the default TCI state of PDSCH in 15/16, a default TCI state for single TRP, a default TCI state for multi-TRP based on multi-DCI, and a default TCI state for multi-TRP based on single DCI are specified.

Rel. The default TCI state of aperiodic CSI-RS (A (periodic)-CSI-RS) in 15/16 is the default TCI state for single TRP, the default TCI state for multi-TRP based on multi-DCI, and the default TCI state for multi-TRP based on single DCI. A default TCI state for multi-TRP is specified.

Rel. In 15/16, the default spatial relationship and default PL-RS for each of PUSCH/PUCCH/SRS are specified.

(Multi TRP)
In NR, one or more Transmission/Reception Points (TRPs) (multi TRPs (MTRPs)) communicate with the UE using one or more panels (multi-panels). DL transmission is being considered. Further, it is being considered that the UE performs UL transmission using one or more panels for one or more TRPs.

Note that multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or may correspond to different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

Multi-TRPs (for example, TRP #1, #2) may be connected by an ideal/non-ideal backhaul, and information, data, etc. may be exchanged. Each TRP of the multi-TRP may transmit a different code word (CW) and a different layer. Non-Coherent Joint Transmission (NCJT) may be used as a form of multi-TRP transmission.

In NCJT, for example, TRP #1 modulates and layer-maps a first codeword to a first number of layers (e.g., 2 layers) to transmit a first PDSCH using a first precoding. do. Additionally, TRP #2 modulates and maps the second codeword, performs layer mapping, and transmits the second PDSCH using a second number of layers (eg, 2 layers) using a second precoding.

Note that multiple PDSCHs to be NCJTed (multiple PDSCHs) may be defined as partially or completely overlapping in at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap in at least one of time and frequency resources.

These first PDSCH and second PDSCH may be assumed not to be in a quasi-co-location (QCL) relationship. Reception of multiple PDSCHs may also be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (for example, QCL type D).

Multiple PDSCHs from multiple TRPs (may be referred to as multiple PDSCH) may be scheduled using one DCI (single DCI, single PDCCH) (single master mode, based on single DCI). Multi-TRP (single-DCI based multi-TRP). Multiple PDSCHs from multiple TRPs may be scheduled using multiple DCIs (multi-DCI, multiple PDCCH), respectively (multi-master mode, multi-DCI based multi-DCI). TRP)).

In URLLC for multiple TRPs, support for PDSCH (transport block (TB) or codeword (CW)) repetition across multiple TRPs is being considered. It is being considered that repetition schemes (URLLC schemes,

e.g. Schemes

1, 2a, 2b, 3, 4) spanning multiple TRPs in the frequency domain or layer (spatial) domain or time domain will be supported. In Scheme 1, multiple PDSCHs from multiple TRPs are space division multiplexed (SDM). In schemes 2a, 2b, PDSCHs from multiple TRPs are frequency division multiplexed (FDM). In scheme 2a, the redundancy version (RV) is the same for multiple TRPs. In scheme 2b, the RVs may be the same or different for multiple TRPs. In

schemes

3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexed (TDM). In Scheme 3, multiple PDSCHs from multiple TRPs are transmitted within one slot. In Scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different slots.

According to such a multi-TRP scenario, more flexible transmission control using channels with good quality is possible.

PDCCH and PDSCH with multiple TRPs to support intra-cell (with the same cell ID) and inter-cell (with different cell IDs) multi-TRP transmission based on multiple PDCCHs. In the RRC configuration information for linking multiple pairs, one control resource set (CORESET) in the PDCCH configuration information (PDCCH-Config) may correspond to one TRP.

If at least one of the following

conditions

1 and 2 is satisfied, the UE may determine that the multi-TRP is based on multi-DCI. In this case, TRP may be replaced with CORESET pool index.
[Condition 1]
A CORESET pool index of 1 is set.
[Condition 2]
Two different values (eg, 0 and 1) of the CORESET pool index are set.

If the following conditions are met, the UE may determine multi-TRP based on single DCI. In this case, the two TRPs may be translated into two TCI states indicated by the MAC CE/DCI.
[conditions]
To indicate one or two TCI states for one code point of the TCI field in the DCI, the "Enhanced TCI States Activation/Deactivation for UE-specific PDSCH MAC CE (Enhanced TCI States Activation/Deactivation for UE- specific PDSCH MAC CE) is used.

The DCI for common beam indication may be a UE-specific DCI format (for example, DL DCI format (for example, 1_1, 1_2), UL DCI format (for example, 0_1, 0_2)), or a UE-group common (UE-group Common) DCI format may be used.

(Multi-TRP PDCCH)
For the reliability of multi-TRP PDCCH based on non-single frequency network (SFN), the following considerations 1 to 3 are considered.
[Study 1] Encoding/rate matching is based on one repetition, and the same coded bits are repeated in other repetitions.
[Consideration 2] Each repetition has the same number of control channel elements (CCEs), the same coded bits, and corresponds to the same DCI payload.
[Consideration 3] Two or more PDCCH candidates are explicitly linked to each other. The UE knows the link before decoding.

The following options 1-2, 1-3, 2, and 3 for PDCCH repetition are being considered.

[Option 1-2]
Two sets of PDCCH candidates (within a given search space (SS) set) are respectively associated with two TCI states of the CORESET. Here, the same CORESET, the same SS set, and PDCCH repetition in different monitoring occasions are used.

[Option 1-3]
Two sets of PDCCH candidates are associated with two SS sets, respectively. Both SS sets are associated with a CORESET, and each SS set is associated with only one TCI state of that CORESET. Here, the same CORESET, two SS sets, is used.

[Option 2]
One SS set is associated with two different CORESETs.

[Option 3]
Two SS sets are associated with two CORESETs, respectively.

Thus, two PDCCH candidates in two SS sets for PDCCH repetition are supported, and it is considered that the two SS sets are explicitly linked.

(SFN PDCCH)
Rel. For a PDCCH/CORESET defined in 15, one TCI state without a CORESET pool index (CORESETPoolIndex) (which may be referred to as TRP information (TRP Info)) is set for one CORESET.

Rel. Regarding the PDCCH/CORESET enhancement defined in 16, in multi-TRP based on multi-DCI, a CORESET pool index is set for each CORESET.

Rel. From 17 onwards, the following

enhancements

1 and 2 regarding PDCCH/CORESET are being considered.

In the case where multiple antennas (small antennas, transmission/reception points) with the same cell ID form a single frequency network (SFN), up to two TCI states can be used in upper layer signaling (RRC signaling/MAC CE) for one CORESET. may be set/activated (enhancement 1). SFN contributes to at least one of the operation and reliability improvement of HST (high speed train).

In addition, in repeated transmission of PDCCH (which may also be simply called "repetition"), two PDCCH candidates in two search space sets are linked, and each search space set is associated with a corresponding CORESET (enhancement 2 ). The two search space sets may be associated with the same or different CORESETs. One (maximum one) TCI state can be set/activated for one CORESET using upper layer signaling (RRC signaling/MAC CE).

If two search space sets are associated with different CORESETs with different TCI states, it may mean repeated transmission of multiple TRPs. If two search space sets are associated with the same CORESET (CORESET with the same TCI state), it may mean repeated transmission of a single TRP.

(HST)
In LTE, it is difficult to arrange HST (high speed train) in tunnels. The large antenna transmits outside/inside the tunnel. For example, the transmission power of a large antenna is about 1 to 5W. For handover, it is important that the UE transmits out of the tunnel before entering it. For example, the transmission power of a small antenna is about 250 mW. Multiple small antennas (transmission/reception points) with the same cell ID and a distance of 300 m form a single frequency network (SFN). All small antennas within an SFN transmit the same signal at the same time on the same PRB. It is assumed that a terminal transmits and receives data to and from one base station. In reality, multiple transmitting and receiving points transmit the same DL signal. During high-speed movement, transmission and reception points in units of several kilometers form one cell. Handover is performed when crossing cells. This allows the frequency of handovers to be reduced.

In NR, data is transmitted from a transmission point (e.g., RRH) in order to communicate with a terminal (hereinafter also referred to as UE) included in a mobile object such as a high-speed train (HST) that moves at high speed. It is assumed that beams will be used. Existing systems (eg, Rel. 15) support communication with mobile bodies by transmitting a unidirectional beam from the RRH.

An RRH that forms a beam in one direction may be called a uni-directional RRH. When the beam is formed in a direction opposite to the direction of travel of the mobile unit (UE), the mobile unit experiences a negative Doppler shift (−f _D ) from each RRH.

Rel. From No. 16 onwards, it is also assumed that a plurality of beams (for example, two or more) are transmitted from the RRH. For example, it is assumed that beams are formed both in the traveling direction of the moving body and in the opposite direction.

An RRH that forms beams in multiple directions (for example, two directions) may be referred to as a bi-directional RRH.

In this HST, the UE communicates in the same way as in single TRP. In a base station implementation, it is possible to transmit from multiple TRPs (same cell ID).

When two RRHs use SFN, the mobile switches between the two RRHs from a negative Doppler-shifted signal to a positive Doppler-shifted signal with higher power. In this case, the maximum Doppler shift change that requires correction is from -f _D to +f _D , which is twice as much as in the case of unidirectional RRH.

Note that in the present disclosure, a positive Doppler shift may be read as information regarding a positive Doppler shift, a Doppler shift in a positive (positive) direction, and Doppler information in a positive (positive) direction. Further, the negative Doppler shift may be read as information regarding a negative Doppler shift, a negative Doppler shift, or Doppler information in a negative direction.

Here, the following schemes 0 to 2 (HST scheme 0 to HST scheme 2) will be compared as HST schemes.

In scheme 0 of Figure 1A, the tracking reference signal (TRS), DMRS, and PDSCH are commonly transmitted (using the same time and frequency resources) to the two TRPs (RRHs) (regular SFN, transparent transparent SFN, HST-SFN).

In scheme 0, since the UE receives the DL channel/signal corresponding to a single TRP, there is one TCI state for the PDSCH.

In addition, Rel. In No. 16, RRC parameters for distinguishing between transmission using single TRP and transmission using SFN are defined. If the UE reports the corresponding UE capability information, it may differentiate between receiving a single TRP DL channel/signal and receiving a PDSCH assuming SFN based on the RRC parameters. On the other hand, the UE may assume a single TRP and perform transmission and reception using SFN.

In scheme 1 of FIG. 1B, the TRS is transmitted TRP-specifically (using different time/frequency resources depending on the TRP). In this example, TRS1 is transmitted from TRP#1, and TRS2 is transmitted from TRP#2.

In scheme 1, there are two TCI states for the PDSCH since the UE receives the DL channel/signal from each TRP using the TRS from each TRP.

In Scheme 2 of FIG. 1C, TRS and DMRS are transmitted TRP-specifically. In this example, TRS1 and DMRS1 are transmitted from TRP#1, and TRS2 and DMRS2 are transmitted from TRP#2. Compared to Scheme 0,

Schemes

1 and 2 can suppress sudden changes in Doppler shift and appropriately estimate/compensate Doppler shift. Since the DMRS of Scheme 2 is increased more than that of Scheme 1, the maximum throughput of Scheme 2 is lower than that of Scheme 1.

In scheme 0, the UE switches between single TRP and SFN based on upper layer signaling (RRC information element/MAC CE).

The UE may switch scheme 1/scheme 2/NW pre-compensation scheme based on upper layer signaling (RRC information element/MAC CE).

In Scheme 1, two TRS resources are configured for the HST proceeding direction and the opposite direction.

Rel. 17 and later, the base station uses a Doppler pre-compensation scheme (Pre-Doppler Compensation scheme, Doppler pre-Compensation scheme, Implementation of a network (NW) pre-compensation scheme (NW pre-compensation scheme, HST NW pre-compensation scheme, TRP pre-compensation scheme, TRP-based pre-compensation scheme) is being considered. TRP performs Doppler compensation in advance when transmitting a DL signal/channel to the UE, thereby making it possible to reduce the influence of Doppler shift when the UE receives the DL signal/channel. In this disclosure, the Doppler precompensation scheme may be a combination of Scheme 1 and Doppler shift precompensation by the base station.

In the Doppler pre-compensation scheme, it is considered that TRS from each TRP is transmitted without Doppler pre-compensation, and PDSCH from each TRP is transmitted with Doppler pre-compensation performed. has been done.

In the Doppler pre-compensation scheme, the TRP that forms a beam in the forward direction of the moving path and the TRP that forms the beam in the opposite direction to the forward direction of the moving path perform Doppler correction and then Transmits DL signals/channels.

Furthermore, Rel. 17 and later, it is being considered to dynamically switch between single TRP and SFN using the TCI field (TCI status field). For example, each TCI code point (TCI field code point, DCI code point) using RRC information element/MAC CE (e.g. Enhanced TCI States Activation/Deactivation for UE-specific PDSCH MAC CE)/DCI (TCI field) , one or two TCI states are set/indicated. A UE may decide to receive a single TRP PDSCH when it is configured/indicated to have one TCI state. Further, when the UE is configured/instructed to set two TCI states, the UE may determine to receive an SFN PDSCH using multi-TRP.

(Simultaneous beam update of multiple CCs)
Rel. At 16, one MAC CE can update the beam index (TCI state) of multiple CCs.

The UE can be configured with up to two applicable CC lists (eg, applicable-CC-list) by RRC. When two applicable CC lists are configured, the two applicable CC lists may correspond to the in-band CA in FR1 and the in-band CA in FR2, respectively.

Activation of TCI state of PDCCH The MAC CE activates the TCI state associated with the same CORESET ID on all BWP/CCs in the applicable CC list.

Activation of TCI state of PDSCH MAC CE activates TCI state on all BWP/CCs in the applicable CC list.

Activation of A-SRS/SP-SRS Spatial Relationships The MAC CE activates the spatial relationships associated with the same SRS resource ID on all BWPs/CCs in the applicable CC list.

In the example of FIG. 2, the UE is configured with an applicable CC list indicating CCs #0, #1, #2, #3 and a list indicating 64 TCI states for each CC's CORESET or PDSCH. . When one TCI state of CC #0 is activated by MAC CE, the corresponding TCI state is activated in CC #1, #2, and #3.

It is considered that such simultaneous beam updates are applicable only to the single TRP case.

For PDSCH, the UE may follow procedure A below.
[Procedure A]
The UE sends an activation command to map up to eight TCI states to code points in the DCI field (TCI field) within one CC/DL BWP or within one set of CC/BWPs. Receive. When one set of TCI state IDs is activated for one set of CC/DL BWPs, then the applicable list of CCs is determined by the CCs indicated in the activation command and the same The set applies to all DL BWPs within the indicated CC. Only if the UE is not provided with different values of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI code point that is mapped to two TCI states; One set of TCI state IDs can be activated for one set of CC/DL BWPs.

For PDCCH, the UE may follow procedure B below.
[Procedure B]
If the UE configures up to two lists of cells for simultaneous TCI state activation with the simultaneous TCI update list (simultaneousTCI-UpdateList-r16 and simultaneousTCI-UpdateListSecond-r16), the simultaneous TCI cell list (simultaneousTCI- CellList), the UE has index p in all configured DL BWPs of all configured cells in one list determined from the serving cell index provided by the MAC CE command. For CORESET, apply the antenna port quasi co-location (QCL) provided by the TCI state with the same activated TCI state ID value. Only if the UE is not provided with different values of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI code point that is mapped to two TCI states; A concurrent TCI cell list may be provided for concurrent TCI state activation.

For semi-persistent (SP)/periodic (AP)-SRS, the UE may based on the following procedure C.
[Procedure C]
For one set of CC/BWP, the spatial relationship information (spatialRelationInfo) for the SP or AP-SRS resource configured by the SRS resource information element (upper layer parameter SRS-Resource) is activated/updated by the MAC CE. If the CC's applicable list is indicated by the simultaneous spatial update list (upper layer parameter simultaneousSpatial-UpdateList-r16 or simultaneousSpatial-UpdateListSecond-r16), then the applicable list of CCs is specified by the same SRS resource in all BWPs in the indicated CC. The spatial relationship information is applied to the SP or AP-SRS resource with the ID. Only if the UE is not provided with different values of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI code point that is mapped to two TCI states; For one set of CC/BWP, the spatial relationship information (spatialRelationInfo) for the SP or AP-SRS resource configured by the SRS resource information element (upper layer parameter SRS-Resource) is activated/updated by the MAC CE. Ru.

Simultaneous TCI cell list (simultaneousTCI-CellList), simultaneous TCI update list (at least one of simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16) are serving cells whose TCI relationships can be updated simultaneously using MAC CE. This is a list of simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16 do not include the same serving cell.

The simultaneous spatial update list (at least one of the upper layer parameters simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16) is a list of serving cells whose spatial relationships can be updated simultaneously using the MAC CE. simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16 do not include the same serving cell.

Here, the simultaneous TCI update list and the simultaneous spatial update list are set by the RRC, the CORESET pool index of the CORESET is set by the RRC, and the TCI code point mapped to the TCI state is indicated by the MAC CE.

(unified/common TCI framework)
According to the unified TCI framework, UL and DL channels can be controlled by a common framework. The unified TCI framework is Rel. Instead of specifying the TCI state or spatial relationship for each channel as in 15, it is possible to specify a common beam (common TCI state) and apply it to all channels of UL and DL. A common beam may be applied to all channels of UL, and a common beam for DL may be applied to all channels of DL.

One common beam for both DL and UL, or a common beam for DL and a common beam for UL (two common beams in total) are considered.

The UE may assume the same TCI state (joint TCI state, joint TCI pool, joint common TCI pool, joint TCI state set) for UL and DL. The UE assumes different TCI states (separate TCI state, separate TCI pool, UL separate TCI pool and DL separate TCI pool, separate common TCI pool, UL common TCI pool and DL common TCI pool) for each of UL and DL. You may.

The default beams of UL and DL may be aligned by beam management based on MAC CE (MAC CE level beam instruction). The default TCI state of the PDSCH may be updated to match the default UL beam (spatial relationship).

DCI-based beam management (DCI level beam indication) may dictate a common beam/unified TCI state from the same TCI pool (joint common TCI pool, joint TCI pool, set) for both UL and DL. X (>1) TCI states may be activated by the MAC CE. The UL/DL DCI may select one from X active TCI states. The selected TCI state may be applied to both UL and DL channels/RSs.

A TCI pool (set) may be a plurality of TCI states set by RRC parameters, or a plurality of TCI states activated by the MAC CE (active TCI state, active TCI pool, set). Each TCI state may be a QCL type A/D RS. SSB, CSI-RS, or SRS may be set as the QCL type A/D RS.

The number of TCI states corresponding to each of one or more TRPs may be defined. For example, the number N (≧1) of TCI states (UL TCI states) applied to UL channels/RSs, and the number M (≧1) of TCI states (DL TCI states) applied to DL channels/RSs. may be specified. At least one of N and M may be notified/set/instructed to the UE via upper layer signaling/physical layer signaling.

In this disclosure, when described as N=M=X (X is an arbitrary integer), the UE is told that It may also mean that the TCI status) is notified/set/instructed.

In addition, when N=X (X is any integer) and M=Y (Y is any integer, Y=X may be used), the UE is This may mean that UL TCI states (corresponding to TRPs) and Y DL TCI states (corresponding to Y TRPs) are notified/set/instructed. The UL TCI state and the DL TCI state may mean a TCI state common to UL and DL (i.e., joint TCI state), or may mean a TCI state of each of UL and DL (i.e., separate TCI state). You may.

For example, when N=M=1, it may mean that the UE is notified/set/instructed of a TCI state common to one UL and DL for a single TRP ( joint TCI state for a single TRP).

For example, if N=1 and M=1 are written, the UE is notified/set/instructed separately of one UL TCI state and one DL TCI state for a single TRP. (separate TCI state for a single TRP).

For example, if N=M=2 is written, the UE is notified/set/instructed of the TCI state common to multiple (two) ULs and DLs for multiple (two) TRPs. (joint TCI state for multiple TRPs).

For example, when N=2 and M=2 are written, the UE has multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs. It may also mean that the state is notified/set/instructed (separate TCI states for multiple TRPs).

Also, for example, when N=2 and M=1 are written, it may mean that the UE is notified/set/instructed of a TCI state common to the two UL and DL. At this time, the UE may use the two TCI states set/instructed as the UL TCI state, and may use one TCI state of the two TCI states set/instructed as the DL TCI state.

For example, when N=2 and M=1 are written, it means that the UE is notified/set/instructed of two UL TCI states and one DL TCI state as separate TCI states. It can also mean

Note that in the above example, the case where the values of N and M are 1 or 2 has been described, but the values of N and M may be 3 or more, or N and M may be different.

The case of M>1/N>1 may indicate at least one of TCI status indications for multiple TRPs and multiple TCI status indications for interband CA.

In the example of FIG. 3A, the RRC parameters (information elements) configure multiple TCI states for both DL and UL. The MAC CE may activate multiple TCI states among the configured multiple TCI states. The DCI may indicate one of multiple activated TCI states. The DCI may be a UL/DL DCI. The indicated TCI state may be applied to at least one (or all) of the UL/DL channels/RSs. One DCI may indicate both UL TCI and DL TCI.

In the example of FIG. 3A, one point may be one TCI state that applies to both UL and DL, or two TCI states that apply to UL and DL, respectively.

At least one of the multiple TCI states set by the RRC parameters and the multiple TCI states activated by the MAC CE may be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). good. The multiple TCI states activated by the MAC CE may be referred to as an active TCI pool (active common TCI pool).

Note that in the present disclosure, upper layer parameters (RRC parameters) that configure multiple TCI states may be referred to as configuration information that configures multiple TCI states, or simply "configuration information." Furthermore, in the present disclosure, being instructed to one of a plurality of TCI states using a DCI may mean receiving instruction information that instructs one of a plurality of TCI states included in the DCI. , it may be simply receiving "instruction information".

In the example of FIG. 3B, the RRC parameters configure multiple TCI states (joint common TCI pool) for both DL and UL. The MAC CE may activate multiple TCI states (active TCI pool) out of multiple configured TCI states. Separate active TCI pools for each of UL and DL may be configured/activated.

The DL DCI or the new DCI format may select (instruct) one or more (for example, one) TCI state. The selected TCI state may be applied to one or more (or all) DL channels/RSs. The DL channel may be PDCCH/PDSCH/CSI-RS. The UE has Rel. 16 TCI state operations (TCI framework) may be used to determine the TCI state of each channel/RS of the DL. The UL DCI or the new DCI format may select (instruct) one or more (eg, one) TCI state. The selected TCI state may be applied to one or more (or all) UL channels/RSs. The UL channel may be PUSCH/SRS/PUCCH. In this way, different DCIs may indicate UL TCI and DL DCI separately.

Existing DCI formats 1_1/1_2 may be used to indicate common TCI status.

The DCI format that indicates the TCI state may be a specific DCI format. For example, the specific DCI format may be DCI format 1_1/1_2 (defined in Rel. 15/16/17).

The DCI format (DCI format 1_1/1_2) that indicates the TCI state may be a DCI format without DL assignment. In this disclosure, a DCI format without DL assignment, a DCI format without scheduling PDSCH (DCI format 1_1/1_2), a DCI format without one or more specific fields (DCI format 1_1/1_2), one or more They may be interchanged with each other, such as DCI format (DCI format 1_1/1_2) in which specific fields are set to fixed values.

For DCI formats without DL assignments (DCI formats that do not include one or more specific fields), the specific fields are the TCI field, the DCI format identifier field, the carrier indicator field, and the bandwidth portion (BWP) indicator field. , Time Domain Resource Assignment (TDRA) field, Downlink Assignment Index (DAI) field (if configured), Transmission Power Control (for scheduled PUCCH). (TPC)) command field, PUCCH resource indicator field, and PDSCH-to-HARQ feedback timing indicator field (if present). . The particular field may be set as a reserved field or may be ignored.

For DCI formats without DL assignments (DCI formats in which one or more specific fields are set to fixed values), the specific fields include the Redundancy Version (RV) field, the Modulation and Coding Scheme (MCS) field, New Data Indicator field, and Frequency Domain Resource Assignment (FDRA) field.

The RV field may be set to all 1s. The MCS field may be set to all ones. The NDI field may be set to zero. Type 0 FDRA fields may be set to all zeros. Type 1 FDRA fields may be set to all ones. The FDRA field for the dynamic switch (upper layer parameter dynamicSwitch) may be set to all zeros.

The common TCI framework may have separate TCI states for DL and UL.

(Default QCL in Rel.17)
Rel. 17, the offset (scheduling offset) between the reception of the DL DCI and the PDSCH corresponding to it is smaller than a specific threshold (e.g., timeDurationForQCL), and the common TCI state (parameter for setting the common TCI state (DLorJointTCIState /UL-TCIState)) is not set (hereinafter also referred to as case A), the UE determines the TCI state (QCL) to apply to the PDSCH according to predetermined rules.

The following explanation may be applied to case A above.

[Single TRP PDSCH]
The UE determines to apply the TCI state associated with the lowest CORESET ID in the latest monitoring slot of the active BWP on the component carrier (CC) to the PDSCH.

[PDSCH of multi-DCI-based multi-TRP]
If the upper layer parameter "enableDefaultTCI-StatePerCoresetPoolIndex" is set, the UE shall transmit the TCI state associated with the lowest CORESET ID with the same CORESET pool index value in the latest monitoring slot of the active BWP in the CC to the PDSCH. It is determined that this applies to

[Single DCI-based multi-TRP PDSCH]
If the upper layer parameter "enableTwoDefaultTCI-States" is set, the UE determines that the TCI state of the lowest TCI code point among the TCI code points to which two different TCI states for PDSCH are associated is to be applied to the PDSCH. .

[Single TRP PDSCH scheduled by SFN PDCCH]
If the upper layer parameter "sfnSchemePdsch" is not set and "sfnSchemePdcch" is set to "sfnSchemeA", and two TCI states are indicated for the CORESET with the lowest CORESET ID in the latest monitoring slot. If so, the UE determines to apply the first TCI state indicated for the CORESET to the PDSCH. Here, the CORESET is the lowest CORESET ID in the latest monitoring slot of the active BWP in the CC.

[PDSCH for cross-carrier scheduling]
When the upper layer parameter "enableDefaultBeamForCCS" is set, the UE determines that the TCI state of the lowest TCI state ID for PDSCH in the active BWP in the scheduled CC (scheduled CC) is applied to the PDSCH.

Rel. 17, the offset (scheduling offset) between the reception of the DL DCI and the corresponding PDSCH is smaller than a specific threshold (e.g., timeDurationForQCL), and the common TCI state (parameter for setting the common TCI state (DLorJointTCIState /UL-TCIState)) is set (hereinafter may be referred to as case B), the UE determines the TCI state (QCL) to apply to the PDSCH according to predetermined rules.

The following explanation may be applied to Case B above.

[PDSCH of SRP]
If the indicated TCI state is associated with a Physical Cell Identifier/Identity (PCI) different from that of the serving cell, the UE shall correspond to the lowest CORESET ID in the most recent monitoring slot of the active BWP in the CC. It is determined that the TCI state is applied to the PDSCH.

At this time, if the properties of QCL type D for CORESET in the slots for multiple CCs in the band are different, the QCL (especially QCL type D) assumption for CORESET in the lowest CC ID is ) may be applied to the PDSCH in the CC.

If the indicated TCI state is associated with the PCI of the serving cell, the UE determines to apply the indicated TCI state to the PDSCH.

Note that application of the TCI status of PDSCHs other than the single TRP PDSCH in case B has not been studied.

Rel. 17, the offset (scheduling offset/triggering offset) between the reception of the DL DCI and the corresponding aperiodic (A-)CSI-RS is smaller than a certain threshold (e.g., beamSwitchTiming), and If the common TCI state (common TCI state configuration parameter (DLorJointTCIState/UL-TCIState)) is not configured (hereinafter also referred to as case C), the UE sets the TCI state (QCL) that applies to the A-CSI-RS. ) is determined according to predetermined rules.

The following explanation may be applied to case C above.

[Single TRP A-CSI-RS]
If any DL signal is present in the same symbol as the A-CSI-RS, the UE determines to apply the QCL assumption of the DL signal to the A-CSI-RS. Otherwise, the UE determines to apply the TCI state associated with the lowest CORESET ID in the latest monitoring slot of the active BWP in the CC to the A-CSI-RS.

[PDSCH of multi-DCI-based multi-TRP]
When the upper layer parameter "enableDefaultTCI-StatePerCoresetPoolIndex" is set and there is any DL signal in the same symbol as the A-CSI-RS, the UE changes the QCL assumption of the DL signal to the A-CSI-RS. - Determined to apply to CSI-RS. Otherwise, the UE determines to apply the TCI state associated with the lowest CORESET ID with the same CORESET pool index value in the latest monitoring slot of the active BWP in the CC to the A-CSI-RS.

[Single DCI-based multi-TRP PDSCH]
When the upper layer parameter "enableTwoDefaultTCI-States" is set and there is any DL signal in the same symbol as the A-CSI-RS, the UE changes the QCL assumption of the DL signal to the A-CSI-RS. - Determined to apply to CSI-RS. At this time, if the DL signal has two TCI states, the UE applies the first TCI state to the A-CSI-RS.

Otherwise, the UE determines that the TCI state of the lowest TCI code point among the TCI code points to which two different TCI states for PDSCH are associated is to be applied to the A-CSI-RS.

[Single TRP A-CSI-RS triggered by SFN PDCCH]
If the upper layer parameter "sfnSchemePdcch" is set to "sfnSchemeA", the upper layer parameter "enableTwoDefaultTCI-States" is not set, and two TCI states are activated for CORESET, and A-CSI-RS If any DL signal exists in the same symbol as , the UE determines to apply the QCL assumption of the DL signal to the A-CSI-RS. Otherwise, the UE determines that the first TCI state indicated for the CORESET is the PDSCH TCI state (QCL). Here, the CORESET is the lowest CORESET ID in the latest monitoring slot of the active BWP in the CC.

[A-CSI-RS for cross-carrier scheduling]
If the upper layer parameter "enableDefaultBeamForCCS" is set, the UE determines that the TCI state of the lowest TCI state ID for PDSCH in the active BWP in the scheduled CC (scheduled CC) is applied to the A-CSI-RS. .

Rel. 17, the offset (scheduling offset/triggering offset) between the reception of the DL DCI and the corresponding A-CSI-RS is smaller than a specific threshold (e.g., beamSwitchTiming), and the common TCI state (common When the TCI state setting parameter (DLorJointTCIState/UL-TCIState) is set (hereinafter also referred to as case D), the UE sets the TCI state (QCL) to be applied to the A-CSI-RS in a predetermined manner. Decided according to the rules.

The following explanation may be applied to Case D above.

[A-CSI-RS of SRP]
If the indicated TCI state is associated with a PCI different from that of the serving cell, the UE shall apply the TCI state corresponding to the lowest CORESET ID in the latest monitoring slot of the active BWP in the CC to the A-CSI-RS. to decide.

At this time, if the properties of QCL type D for CORESET in the slots for multiple CCs in the band are different, the QCL (especially QCL type D) assumption for CORESET in the lowest CC ID is ) may be applied to the A-CSI-RS in the CC.

If the indicated TCI state is associated with the PCI of the serving cell, the UE determines to apply the indicated TCI state to the A-CSI-RS.

Note that application of the TCI status of A-CSI-RS other than the A-CSI-RS of single TRP in case D has not been studied.

(analysis)
As described above, when a common TCI state is set, the method of determining/applying the TCI state/QCL under specific conditions has not been sufficiently studied.

Also, in the existing specifications (before Rel. 17), the UE cannot assume different default QCLs for buffering DL signals in different BWP/CCs. The assumed operation of the UE's QCL in such a case has not been sufficiently studied.

Also, Rel. In the HST-SFN scheme in No. 17, the operation of the UE when the DL signal of the same symbol as the A-CSI-RS symbol is a PDSCH with two TCI states has not been sufficiently studied.

If these considerations are not sufficient, there is a risk of deterioration in communication quality and throughput.

Therefore, the present inventors came up with a method for appropriately setting/instructing/applying TCI states in signal/channel transmission/reception using multi-TRP.

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

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

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

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

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

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

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

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

In this disclosure, a panel, a UE panel, a panel group, a beam, a beam group, a precoder, an uplink (UL) transmitting entity, a transmission/reception point (TRP), a base station, and a spatial relation information (SRI) are described. )), spatial relationship, SRS resource indicator (SRI), control resource set (CONtrol REsource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword (CW), transport Block (Transport Block (TB)), reference signal (RS), antenna port (e.g. demodulation reference signal (DMRS) port), antenna port group (e.g. DMRS port group), groups (e.g., spatial relationship groups, Code Division Multiplexing (CDM) groups, reference signal groups, CORESET groups, Physical Uplink Control Channel (PUCCH) groups, PUCCH resource groups), resources (e.g., reference signal resources, SRS resource), resource set (for example, reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), joint TCI state, Separate DL/UL TCI state, unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumption, etc. may be read interchangeably. In the present disclosure, the separate DL/UL TCI state may be read as the DL/UL TCI state.

Additionally, the spatial relationship information identifier (ID) (TCI status ID) and the spatial relationship information (TCI status) may be read interchangeably. “Spatial relationship information” may be interchangeably read as “a set of spatial relationship information”, “one or more pieces of spatial relationship information”, etc. TCI status and TCI may be read interchangeably.

Furthermore, the panel identifier (ID) and the panel may be read interchangeably. That is, TRP ID and TRP, CORESET group ID and CORESET group, etc. may be read interchangeably.

In this disclosure, one of two TCI states associated with one code point of TRP, transmission point, panel, DMRS port group, CORESET pool, TCI field may be read interchangeably.

In this disclosure, single (single) TRP, single TRP system, single TRP transmission, and single PDSCH may be read interchangeably. In this disclosure, multi-TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be interchanged.

In this disclosure, a single DCI, a single PDCCH, multiple TRPs based on a single DCI, activated two TCI states on at least one TCI code point, at least one code point of a TCI field mapped to two TCI states. and that a particular index (eg, a TRP index, a CORESET pool index, or an index corresponding to a TRP) is set for a particular channel/CORESET may be read interchangeably.

In this disclosure, a single TRP, a channel using a single TRP, a channel using one TCI state/space relationship, multiple TRPs are not enabled by RRC/DCI, and multiple TCI state/space relationships are enabled by RRC/DCI. may be interchanged: no CORESET pool index (CORESETPoolIndex) value of 1 is set for any CORESET, and no code point in the TCI field is mapped to two TCI states. .

In this disclosure, multiple TRPs, channels using multiple TRPs, channels using multiple TCI state/spatial relationships, multiple TRPs being enabled by RRC/DCI, multiple TCI states/spatial relationships being enabled by RRC/DCI, At least one of the multi-TRP based on the single DCI and the multi-TRP based on the multi-DCI may be read interchangeably.

In this disclosure, a CORESET pool index (CORESETPoolIndex) value of 1 is set for a multi-TRP, CORESET based on multi-DCI, and multiple specific indexes (e.g., TRP index, CORESET "Pool index" or "TRP-corresponding index) is set" may be read interchangeably.

In this disclosure, TRP #1 (first TRP) may correspond to CORESET pool index = 0, or may correspond to the first TCI state of two TCI states corresponding to one code point of the TCI field. You may. TRP #2 (second TRP) TRP #1 (first TRP) may correspond to CORESET pool index = 1, or the second TCI of two TCI states corresponding to one code point in the TCI field. It may correspond to the state.

In this disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, activated two TCI states on at least one TCI code point, may be read as each other. .

In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, mDCI-based MTRP, two CORESET pool indexes, or a CORESET pool index = 1 (or a value of 1 or more) is set. They may be read interchangeably.

The QCL of the present disclosure may be interchanged with QCL type D.

In this disclosure, “TCI state A is the same QCL type D as TCI state B,” “TCI state A is the same as TCI state B,” “TCI state A is the same as TCI state B and QCL type D.” "There is" may be read interchangeably.

In the present disclosure, the code points of the DCI field 'Transmission Configuration Indication', the TCI code points, the DCI code points, and the code points of the TCI field may be read interchangeably.

In this disclosure, single TRP and SFN may be read interchangeably. In this disclosure, HST, HST scheme, high-speed movement scheme, scheme A, scheme B, scheme 1, scheme 2, NW pre-compensation scheme, HST scheme 1, HST scheme 2, and HST NW pre-compensation scheme are interchangeable. It's okay to be hit.

In the present disclosure, PDSCH/PDCCH using single TRP may be read as PDSCH/PDCCH based on single TRP, single TRP PDSCH/PDCCH. In addition, in the present disclosure, PDSCH/PDCCH using SFN may be read as PDSCH/PDCCH using SFN in multichannel, PDSCH/PDCCH based on SFN, and SFN PDSCH/PDCCH.

In the present disclosure, receiving DL signals (PDSCH/PDCCH) using SFN means transmitting the same data (PDSCH)/control information (PDCCH) to multiple It may also mean receiving from a sending/receiving point. Receiving a DL signal using SFN also means using the same time/frequency resources and/or the same data/control information using multiple TCI states/spatial domain filters/beams/QCLs. It may also mean receiving the information.

In this disclosure, HST-SFN scheme, Rel. SFN scheme after Rel.17, new SFN scheme, new HST-SFN scheme, Rel. HST-SFN Scenario 17 and Later, HST-SFN Scheme for HST-SFN Scenario, SFN Scheme for HST-SFN Scenario, Scheme 1, Scheme A, HST-SFN Scheme A/B, HST-SFN Type A/ B. Doppler pre-compensation scheme, Scheme 1 (HST Scheme 1) and at least one of the Doppler pre-compensation schemes may be read interchangeably.

In this disclosure, Doppler pre-compensation scheme, base station pre-compensation scheme, TRP pre-compensation scheme, pre-Doppler compensation scheme, Doppler pre-compensation scheme, NW pre-compensation scheme, HST NW pre-compensation scheme, TRP pre-compensation scheme , TRP-based pre-compensation scheme, HST-SFN scheme A/B, and HST-SFN type A/B may be read interchangeably. In this disclosure, a pre-compensation scheme, a reduction scheme, an improvement scheme, and a correction scheme may be read interchangeably.

In the present disclosure, PDCCH/search space (SS)/CORESET with linkage, linked PDCCH/SS/CORESET, and PDCCH/SS/CORESET pair may be read interchangeably. In the present disclosure, PDCCH/SS/CORESET without linkage, unlinked PDCCH/SS/CORESET, and independent PDCCH/SS/CORESET may be read interchangeably.

In this disclosure, two linked CORESETs for PDCCH repetition, two CORESETs respectively associated with two linked SS sets, may be read interchangeably.

In this disclosure, SFN-PDCCH repetition, PDCCH repetition, two linked PDCCHs, and one DCI received across the two linked search spaces (SS)/CORESETs may be read interchangeably. good.

In this disclosure, PDCCH repetition, SFN-PDCCH repetition, PDCCH repetition for higher reliability, PDCCH for higher reliability, PDCCH for reliability, two linked PDCCHs are interchanged. Good too.

In the present disclosure, the terms PDCCH reception method, PDCCH repetition, SFN-PDCCH repetition, HST-SFN, and HST-SFN scheme may be interchanged.

In this disclosure, the PDSCH reception method, single DCI-based multi-TRP, and HST-SFN scheme may be interchanged.

In this disclosure, single DCI-based multi-TRP repetition may be NCJT of enhanced mobile broadband (eMBB) service (low priority, priority 0), or URLLC service (high priority) of ultra-reliable and low latency communications service. Priority and priority 1) may be repeated.

In each embodiment of the present disclosure, a PDSCH for multiple TRPs based on a single DCI may be mutually read as a PDSCH to which TDM/FDM/SDM for multiple TRPs (defined in Rel. 16) is applied.

In each embodiment of the present disclosure, a PDSCH for multiple TRPs may be mutually read as a PDSCH to which TDM/FDM/SDM for multiple TRPs based on a single DCI (defined in Rel. 16) is applied.

In each embodiment of the present disclosure, the PUSCH/PUCCH/PDCCH for multiple TRPs based on a single DCI is mutually connected to the repetition transmission (repetition) of PUSCH/PUCCH/PDCCH for multiple TRPs (defined in Rel. 17 or later). It may be read differently.

In each embodiment of the present disclosure, the SFN PDSCH/PDCCH is Rel. SFN PDSCH/PDCCH defined in 17 and later may be read interchangeably.

In each embodiment of the present disclosure, setting the use of multiple TRPs based on multi-DCI may mean setting CORESET pool index=1. Also, setting the use of multiple TRPs based on multi-DCI may mean setting two different values (for example, 0 and 1) of CORESET pool indexes.

In embodiments of the present disclosure, if joint TCI states/separate TCI states in the unified TCI state framework are not applicable to each channel/signal, determine the TCI state/QCL/spatial relationship for each channel. To do this, the default TCI state/QCL/spatial relationships described above may be used.

Hereinafter, each embodiment of the present disclosure will be described in accordance with the above-mentioned Rel. It may be applied to the transmission and reception of any channel/signal that is subject to the unified TCI state framework defined in 17 et seq.

In this disclosure, applying TCI state/QCL assumptions to each channel/signal/resource may mean applying TCI state/QCL assumptions to transmission and reception of each channel/signal/resource.

In the present disclosure, the terms "small," "less," "short," and "low" may be read interchangeably. In addition, in the present disclosure, the terms "ignore," "drop," "cancel," "suspend," and "postpone" may be used interchangeably.

In the present disclosure, repetition, repeated transmission, and repeated reception may be interchanged.

In the present disclosure, the terms channel, signal, and channel/signal may be interchanged. In the present disclosure, the terms DL channel, DL signal, DL signal/channel, transmission/reception of DL signal/channel, DL reception, and DL transmission may be interchanged. In this disclosure, UL channel, UL signal, UL signal/channel, transmission/reception of UL signal/channel, UL reception, and UL transmission may be read interchangeably.

In the present disclosure, the first TCI state may correspond to the first TRP. In the present disclosure, a second TCI state may correspond to the second TRP. In the present disclosure, the n-th TCI state may correspond to the n-th TRP.

In the present disclosure, a first CORESET pool index value (e.g., 0), a first TRP index value (e.g., 1), and a first TCI state (first DL/UL (joint/separate) TCI states) may correspond to each other. In the present disclosure, a second CORESET pool index value (e.g., 1), a second TRP index value (e.g., 2), and a second TCI state (second DL/UL (joint/separate) TCI states) may correspond to each other.

In addition, in each embodiment of the present disclosure described below, regarding the application of multiple TCI states in transmission and reception using multiple TRPs, a method that targets two TRPs (that is, when at least one of N and M is 2) Although the number of TRPs may be three or more (plurality), each embodiment may be applied to correspond to the number of TRPs. In other words, at least one of N and M may be a number greater than two.

(Wireless communication method)
<0th embodiment>
Single DCI-based multi-TRP may be assumed to be supported if multi-TRP utilizes an ideal backhaul (see FIG. 4A).

At this time, one beam instruction DCI may indicate multiple TCI states for each TRP. The plurality of TCI states may be, for example, a maximum of two joint TCI states, or a maximum of four separate DL/UL TCI states (two DL TCI states and two UL TCI states). good.

In the present disclosure, one TCI state may mean one joint (DL/UL) TCI state, or may refer to at least one of one DL (separate) TCI state and one UL (separate) TCI state. It can also mean

Multi-PDCCH (DCI) may be assumed to be supported when multiple TRPs utilize ideal backhaul/non-ideal backhaul (see Figure 4B). .

At this time, one DCI associated with one TRP (CORESET pool index) may indicate the TCI state corresponding to the TRP.

Note that the ideal backhaul may also be called DMRS port group type 1, reference signal related group type 1, antenna port group type 1, CORESET pool type 1, etc. Non-ideal backhaul may be referred to as DMRS port group type 2, reference signal related group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

The field (TCI field) that indicates the TCI status included in the DCI may follow at least one of the following options 0-1 and 0-2.

[Choice 0-1]
Rel. The TCI field defined up to 15/16 may be reused (see FIG. 5A). As shown in FIG. 5A, the DCI may include one TCI field. The number of bits in the TCI field may be a specific number (for example, 3).

[Choice 0-2]
Rel. The TCI field defined up to 15/16 may be expanded (see FIG. 5B). For example, the DCI may include a plurality of (for example, two) TCI fields. The number of bits in each TCI field may be a specific number (eg, 3).

In option 0-2, no DCI overhead is added for DCI without DL assignment. On the other hand, DCI overhead is added for DCI including DL assignment.

For single DCI-based multi-TRP, in case of joint TCI state, DL/UL (joint) TCI state may be activated for the UE using MAC CE. The UE may then be instructed to a first DL/UL (joint) TCI state and a second DL/UL (joint) TCI state using DCI (beam indication) (see FIG. 6A). ).

The TCI code point indicated by the beam instruction may correspond to one or more (two) TCI states (first joint TCI state/second joint TCI state) (see FIG. 6B).

In the example shown in FIG. 6B, all of the TCI code points corresponding to an active TCI state correspond to two TCI states, but at least one of the TCI code points corresponding to an active TCI state corresponds to two TCI states. An association corresponding to the above may also be used. By using such an association, it is possible to dynamically switch between single TRP and multi-TRP.

For single DCI-based multi-TRP, in the case of separate TCI state, DL (separate) TCI state and UL (separate) TCI state may be activated for the UE using MAC CE. The UE then uses the DCI (Beam Indication) to enter a first DL (Separate) TCI state and a first UL (Separate) TCI state, a second DL (Separate) TCI state and a second UL ( separate) TCI state (see FIG. 7A).

The TCI code point indicated by the beam instruction corresponds to one or more (two) TCI states (first separate (DL/UL) TCI state/second separate (DL/UL) TCI state). (See FIG. 7B).

In the example shown in FIG. 7B, all TCI code points corresponding to the active TCI state correspond to two TCI states (first separate (DL/UL) TCI state/second separate (DL/UL) TCI state). However, an association may be used in which at least one of the TCI code points corresponding to an active TCI state corresponds to two TCI states. By using such an association, it is possible to dynamically switch between single TRP and multi-TRP.

In addition, in FIG. 7A, regarding the TCI state activated by the MAC CE, an example was shown in which separate TCI states are activated in the DL TCI state and the UL TCI state, but even in the case of the separate TCI state, the activated The DL TCI state and UL TCI state to be provided may include a common TCI state.

Regarding the multi-DCI-based multi-TRP, at least one of setting of the TCI state by RRC, activation by MAC CE, and instruction by DCI may be performed for each CORESET pool index.

For multi-DCI-based multi-TRP, for a joint TCI state, for a CORESET pool index of the first value (e.g. 0), for the UE, configuration of TCI state by RRC, activation by MAC CE; Instructions may also be given by the DCI (see FIG. 8A). The indicated TCI state corresponding to the first value of the CORESET pool index may be referred to as a first TCI state.

The TCI code point indicated by the beam instruction may correspond to one TCI state (first joint TCI state) (see FIG. 8B).

For multi-DCI-based multi-TRP, for joint TCI state, for the UE a CORESET pool index of a second value (e.g. 1), configuration of TCI state by RRC, activation by MAC CE; Instructions may also be given by the DCI (see FIG. 9A). The indicated TCI state corresponding to the second value of the CORESET pool index may be referred to as a second TCI state.

The TCI code point indicated by the beam instruction may correspond to one TCI state (second joint TCI state) (see FIG. 9B).

When the DCI corresponding to each CORESET pool index indicates the same TCI state (TCI state ID) (for example, when TCI state #7 corresponding to TCI code point "111" in FIGS. 8B and 9B is indicated) , the UE may determine that one TCI state is indicated. At this time, the UE may perform an operation using a single TRP.

Note that although the multi-DCI-based multi-TRP described above has been described as an example using a joint TCI state, it can also be appropriately applied to a case using a separate TCI state.

In the present disclosure, indicated TCI state, Rel. 17 TCI state, common TCI state, and unified TCI state may be read interchangeably. In this disclosure, common TCI states applied to channels/signals utilizing multi-TRP, Rel. 17TCI state, Rel. 18TCI states may be read interchangeably.

The UE may apply the indicated TCI state to a particular channel/signal.

The specific channel/signal may be a UE-dedicated DL channel/signal. The UE-specific DL channel/signal may be a UE-specific PDCCH/PDSCH/CSI-RS (eg, an aperiodic (A-) CSI-RS).

The specific channel/signal may be a specific UL channel/signal. A specific UL channel/signal can be a DCI-indicated PUSCH (indicated by a dynamic grant), a configured grant PUSCH, multiple (all) unique PUCCHs (resources), SRS (e.g. aperiodic (A-))SRS).

One or more (for example, two) indicated TCI states may be indicated based on the method described in the zeroth embodiment above.

Note that in each embodiment of the present disclosure, an example will be described in which the number of TCI states instructed to the UE is one or two, but the number of TCI states instructed is not limited to this. For example, the number of TCI states instructed to the UE may be three or more (for example, four).

The following embodiments of the present disclosure may be applied to a single TRP PDSCH.

A single TRP PDSCH may be scheduled with a specific DCI (DCI format). The specific DCI format may be, for example, DCI format 1_0 (or a DCI format that does not include a TCI field). The specific DCI format may be DCI format 1_1/1-2. The particular DCI format may indicate one TCI state.

The QCL assumption for a single TRP PDSCH may be the default TCI state. The default TCI state may be one TCI state (in any DCI format).

Repeated transmission of multi-TRPs may not be configured for the UE. At this time, the single TRP PDSCH may be scheduled as a single layer MIMO (with single layer MIMO) PDSCH.

The single TRP PDSCH may be the PDSCH when multiple TRPs (for example, CORESET pool index) are not configured in the UE.

The single TRP PDSCH may be a PDSCH scheduled at least in CSS CORESET. A single TRP PDSCH may be a PDSCH scheduled with a CORESET of only a CSS (or a CSS other than a type 3 CSS).

The following embodiments of the present disclosure may be applied to a multi-TRP PDSCH.

A single TRP PDSCH may be scheduled with a specific DCI (DCI format). The specific DCI format may be DCI format 1_1/1-2. The particular DCI format may indicate two TCI states.

The QCL assumption for PDSCH of multi-TRP may be the default TCI state. The default TCI state may be two TCI states (in any DCI format).

Repeated transmission of multi-TRPs may not be configured for the UE. At this time, the multi-TRP PDSCH may be scheduled as a multi-layer MIMO (with multi-layer MIMO) PDSCH.

The multi-TRP PDSCH may be a PDSCH when the UE is configured to repeatedly transmit multi-TRP. At this time, the multi-TRP PDSCH may be scheduled as a PDSCH with repetition transmission (using TDM/FDM/SDM).

The multi-TRP PDSCH may be a PDSCH when SFN scheme A/B is configured in the UE. A multi-TRP PDSCH may be a PDSCH with multiple TCI states.

The following embodiments of the present disclosure may be applied to a single TRP PDCCH.

The single TRP PDCCH may be a PDCCH related to a CORESET in which SFN scheme A/B is not configured.

The PDCCH of a single TRP may be a PDCCH related to a CORESET (of two linked SSs) in which repeated transmission is not configured.

The following embodiments of the present disclosure may be applied to a multi-TRP PDCCH.

The multi-TRP PDCCH may be a PDCCH related to a CORESET in which SFN scheme A/B is configured.

The following embodiments of the present disclosure may be applied to a single TRP PUSCH/PUCCH.

The single TRP PUSCH/PUCCH may be a PUSCH/PUCCH for which repeated transmission of multiple TRPs is not set.

The following embodiments of the present disclosure may be applied to multi-TRP PUSCH/PUCCH.

The multi-TRP PUSCH/PUCCH may be a PUSCH/PUCCH on which repeated transmission of the multi-TRP is configured.

The following embodiments of the present disclosure may be applied to single/multi-TRP CSI-RS/SRS.

Hereinafter, each embodiment of the present disclosure describes a PDSCH that is subjected to single DCI-based NCJT, a PDSCH that is subjected to multi-DCI-based NCJT, repeated transmission of a PDSCH that is subjected to single DCI-based SDM/TDM/FDM, and PDCCH/PUCCH that uses multiple TRPs. / PUSCH repeated transmission, operations related to multi-TRP in inter-cell, beam management for multi-TRP, and when a common TCI state is set in at least one of the HST/SFN schemes. good.

Additionally, the extension of the common TCI state may be used for beam pointing in inter-band carrier aggregation. In beam designation in inter-band carrier aggregation, one or more TCI states of a plurality of different bands may be designated using one MAC CE/DCI.

One or more (for example, two) TCI states may be indicated to the UE by the beam indication DCI. In this disclosure, the TCI state may be referred to as an "indicated TCI state."

A list of TCI states may be configured for the UE. The list may include multiple TCI states. As mentioned above, the list of TCI states may be configured using RRC signaling. The TCI state may be referred to as a "configured TCI state."

Additionally, the UE may be configured with a list of TCI states, and one or more TCI states may be activated from the list. As mentioned above, the TCI state may be activated using the MAC CE. The TCI state may also be referred to as a "TCI state to be set."

The UE may apply at least one of the "set TCI states" to each channel/signal. At this time, the UE selects one or more of the "TCI states to be set" (for example, , 2) TCI states may be applied.

In the present disclosure, "first" may be read as "second" or "nth" (n is an integer of 3 or more).

In this disclosure, for the case where the UE selects/determines the first TCI state (indicated TCI state) or the second TCI state (indicated TCI state), upper layer signaling (RRC/MAC CE) is provided to the UE. ) may be used to select/determine which TCI state.

Hereinafter, using FIG. 10, an overview of UE operations according to the first to fifth embodiments described below will be explained.

First, it may be determined whether a common TCI state is set (step S1001).

If it is determined in step S1001 that a common TCI state is set, then it may be determined whether transmission using multi-DCI multi-TRP is set (step 1002).

In step S1002, if it is determined that transmission using multi-DCI multi-TRP is set, it may be determined to apply the first/second embodiment.

Note that in step 1002, an RRC parameter (enabler, for example, enableDefaultTCI-StatePerCoresetPoolIndex or a parameter newly defined in Rel. 18) is set to enable the default TCI state/QCL for multi-DCI multi-TRP. It may be determined whether or not.

In step S1002, if it is determined that transmission using multi-DCI multi-TRP is not set, then it may be determined whether transmission using single-DCI multi-TRP is set (step S1003).

In step S1003, if it is determined that transmission using a single DCI multi-TRP is set, it may be determined to apply the third/fourth (/fifth) embodiment.

In step S1003, if it is determined that transmission using single DCI multi-TRP is not set, the above-mentioned Rel. The operations regarding the default QCL in No. 17 may be applied.

Note that in step 1003, an RRC parameter (enabler, for example, enableTwoDefaultTCI-States or a parameter newly defined in Rel. 18) is set to enable the default TCI state/QCL for multiple TRPs of a single DCI. It may be determined whether or not.

Note that the order of steps S1001 to S1003 described above is only an example. The order of steps S1001 to S1003 described above may be any order, or each step may be determined independently.

<First embodiment>
The first embodiment relates to TCI status/QCL of a channel in multi-DCI-based multi-TRP.

A uniform TCI state may be set for the UE. For example, the UE may be configured with RRC parameters for setting unified TCI state.

The RRC parameter regarding the unified TCI state setting may be, for example, at least one of the DL or joint TCI state setting parameter (for example, DLorJointTCIState) and the UL TCI state setting parameter (UL-TCIState).

The configuration parameter (for example, DLorJointTCIState) of the DL or joint TCI state may indicate a DL (separate) TCI state/joint TCI state. The configuration parameter (for example, UL-TCIState) of the UL TCI state may indicate the UL TCI state.

Below, in each embodiment of the present disclosure, a unified TCI state is set, a (separate) DL/UL/Joint TCI state is set, and RRC parameters related to the setting of the unified TCI state (for example, DLorJointTCIState/UL-TCIState ) may be read interchangeably.

Channel/signal transmission/reception using multi-DCI multi-TRP may be configured for the UE.

Hereinafter, this embodiment may be applied when the scheduling offset is smaller than a specific threshold (for example, timeDurationForQCL/beamSwitchTiming/specific parameter). The particular threshold may be determined based on UE capability information reported by the UE.

Note that in the present disclosure, timeDurationForQCL/beamSwitchTiming may be used as the specific threshold value, or a specific parameter (defined in Rel. 18 or later) may be used.

The UE may determine the TCI status/QCL of a specific DL channel/signal based on a specific method. The particular DL channel/signal may be, for example, a PDSCH.

The particular method may be a method based on TCI state or QCL assumptions corresponding to a particular COREST pool index. For example, the specific method may be a method described in at least one of Embodiments 1-1 to 1-3 below.

《Embodiment 1-1》
The UE may apply QCL assumptions/TCI states corresponding to a particular CORESET ID to a particular DL channel/signal (eg, PDSCH).

The particular CORESET ID may be a predetermined (eg, lowest) CORESET ID with the same CORESET pool index (as the CORESET that schedules the PDSCH) in the latest monitoring slot.

The latest monitoring slot may be a monitoring slot in an active BWP in one CC.

If the QCL characteristics (e.g. QCL type D) for a CORESET in one slot for multiple CCs in a band are different, then the CORESET for that particular CORESET ID is the CORESET in the active BWP in the CC with the lowest CC ID. There may be.

At this time, the UE may determine a total of n QCL assumptions for n (eg, n=2) CORESET pool indices.

When the "TCI state indicated"/"TCI state set" is applied to the CORESET, the "TCI state indicated"/"TCI state set" is a specific DL channel/signal (e.g. , PDSCH).

When multiple (two) TCI states correspond to one CORESET, the UE determines that any one TCI state among the multiple TCI states is applied to a specific DL channel/signal (e.g., PDSCH). You can.

《Embodiment 1-2》
The UE sets the "indicated TCI state (joint TCI state/DL (separate) TCI state)" for the CORESET pool index with a first value (e.g., 0) and a CORESET with a second value (e.g., 1). The "indicated TCI state (joint TCI state/DL (separate) TCI state)" for the pool index may be applied to a specific DL channel/signal (eg, PDSCH).

If the QCL characteristics (e.g. QCL type D) for the CORESET in one slot for multiple CCs in the band are different, the determined/selected CORESET is the one in the active BWP in the CC with the lowest CC ID. You can.

In multi-DCI-based multi-TRP, two TCI states may be indicated by one beam indicating DCI. In this case, the UE may apply the first indicated TCI state and the second indicated TCI state indicated in each DCI for each of the PDSCHs.

For example, if DCI #1 indicates TCI state #1 and TCI state #2, and DCI #2 indicates TCI state #3 and TCI state #4, the UE TCI state #1 and TCI state #2 may be applied to DCI #2, and TCI state #3 and TCI state #4 may be applied to PDSCH #2 related to DCI #2.

《Embodiment 1-3》
Either of the above embodiments 1-1 and 1-2 may be selected/applied based on specific conditions.

The specific condition may be, for example, a condition based on the PCI associated with the "indicated TCI state."

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with the PCI of the serving cell (i.e., intra-cell) ), the UE may decide to apply the above embodiment 1-2.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with a PCI different from the serving cell's PCI (i.e., inter-cell ), the UE may decide to apply the above embodiment 1-1.

For intra-cells, it is useful to always use two "indicated TCI states" for the PDSCH. On the other hand, when the "indicated TCI state" is associated with a PCI different from the PCI of the serving cell (ie, in the case of inter-cell), a problem arises in that the UE cannot receive a PDSCH dedicated to non-UEs. This embodiment is effective in solving this problem.

The UE also allows receiving at least one of the PDSCH from any or all (both) serving cells and the PDSCH from non-serving cells at the same time (time domain (e.g., slot/symbol)). may be done.

Furthermore, when Embodiment 1-2 is applied in inter-cell, the UE may switch to intra-cell operation. The base station may instruct the UE regarding the switching. The instruction may be given by RRC/MAC CE/DCI.

At least one of the above embodiments 1-1 to 1-3 may be applied (only) when specific RRC parameters are configured for the UE. If not, the UE uses the above-mentioned Rel. The method described in Default QCL in No. 17 may be applied.

The particular RRC parameter/setting may be, for example, a parameter that enables the default TCI state per CORESET pool index (e.g., "enableDefaultTCI-StatePerCoresetPoolIndex"), or a Rel. It may be a specific parameter defined after 18.

According to this, the UE does not need to assume multiple default QCLs in order to buffer DL channels/signals, and the UE processing can be simplified.

According to the first embodiment, TCI state/QCL assumptions can be appropriately applied to DL channels/signals (for example, PDSCH) that utilize multi-DCI and multi-TRP.

<Second embodiment>
The second embodiment relates to channel TCI status/QCL in multi-DCI-based multi-TRP.

The UE may determine the TCI status/QCL of a specific DL channel/signal based on a specific method. The particular DL channel/signal may be, for example, A-CSI-RS.

Other DL channels/signals may not exist in the same symbol as the symbol in which the particular DL channel/signal is transmitted.

The particular method may be a method based on TCI state or QCL assumptions corresponding to a particular COREST pool index. The specific method may be, for example, the method described in at least one of Embodiments 2-1 to 2-3 below.

《Embodiment 2-1》
The UE may apply QCL assumptions/TCI states corresponding to a particular CORESET ID to a particular DL channel/signal (eg, A-CSI-RS).

The particular CORESET ID may be a predetermined (eg, lowest) CORESET ID with the same CORESET pool index (as the CORESET that triggers the A-CSI-RS) in the latest monitoring slot.

The latest monitoring slot may be a monitoring slot in an active BWP in one CC.

At this time, the UE may determine one QCL assumption for each CORESET pool index.

When the "TCI state indicated"/"TCI state set" is applied to the CORESET, the "TCI state indicated"/"TCI state set" is a specific DL channel/signal (e.g. , A-CSI-RS).

When multiple (two) TCI states correspond to one CORESET, the UE assigns any one TCI state (for example, the selected first TCI state) among the multiple TCI states to a specific DL channel. / signal (for example, A-CSI-RS).

《Embodiment 2-2》
The UE sets the "indicated TCI state (joint TCI state/DL (separate) TCI state)" for the CORESET pool index with a first value (e.g., 0) and a CORESET pool with a second value (e.g., 1). Either the "indicated TCI state (joint TCI state/DL (separate) TCI state)" for indexing may be applied to a specific DL channel/signal (for example, A-CSI-RS). .

For example, the UE determines the "indicated TCI state (joint TCI state/DL (separate) TCI state)" for the CORESET pool index of the first (or second) value (e.g., 0 (or 1)). may be applied to a specific DL channel/signal (eg, A-CSI-RS).

In multi-DCI-based multi-TRP, two TCI states may be indicated by one beam indicating DCI. In this case, the UE may apply either the first indicated TCI state or the second indicated TCI state indicated in each DCI for each of the A-CSI-RSs.

For example, if DCI #1 indicates TCI state #1 and TCI state #2, and DCI #2 indicates TCI state #3 and TCI state #4, the UE - Apply either TCI state #1 or TCI state #2 to RS #1, and apply either TCI state #3 or TCI state #4 to A-CSI-RS #2 related to DCI #2. You can.

《Embodiment 2-3》
Either of the above embodiments 2-1 and 2-2 may be selected/applied based on specific conditions.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with the PCI of the serving cell (i.e., intra-cell) ), the UE may decide to apply the above embodiment 2-2.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with a PCI different from the serving cell's PCI (i.e., inter-cell ), the UE may decide to apply the above embodiment 2-1.

The effects of this embodiment are similar to those described in Embodiments 1-3.

The UE may also transmit the A-CSI-RS from any or all (both) serving cells and/or the A-CSI-RS from non-serving cells at the same time (time domain (e.g., slot/symbol )).

Furthermore, when Embodiment 2-2 is applied in inter-cell, the UE may switch to intra-cell operation. The base station may instruct the UE regarding the switching. The instruction may be given by RRC/MAC CE/DCI.

At least one of the above embodiments 2-1 to 2-3 may be applied (only) when specific RRC parameters are configured for the UE. If not, the UE uses the above-mentioned Rel. The method described in Default QCL in No. 17 may be applied.

According to the second embodiment, TCI state/QCL assumptions can be appropriately applied to DL channels/signals (for example, A-CSI-RS) that utilize multi-DCI and multi-TRP.

<Third embodiment>
The third embodiment relates to TCI status/QCL of a channel in single DCI-based multi-TRP.

Channel/signal transmission/reception using single DCI multi-TRP may be configured for the UE. Corresponding to at least one TCI code point with multiple (eg, two) TCI states may mean that channel/signal transmission/reception using multiple TRPs of a single DCI is configured.

The particular method may be based on a TCI state corresponding to a particular TCI code point or a unified TCI state corresponding to an index regarding a particular transmission/reception point (TRP). The specific method may be, for example, the method described in at least one of Embodiments 3-1 to 3-3 below.

《Embodiment 3-1》
The UE may apply QCL assumptions/TCI states corresponding to specific TCI code points to specific DL channels/signals (eg, PDSCH).

The particular TCI code point is a predetermined (e.g., lowest) TCI code point corresponding to multiple (e.g., two) different TCI states for the PDSCH (in the active BWP in the scheduled CC). It may be a TCI code point.

The TCI codepoint may be associated with one or more (eg, two) UL TCI states. The TCI codepoint may be associated with one or more (eg, two) UL TCI states apart from multiple joint/DL TCI states.

At this time, the UE may determine a total of n QCL assumptions for n (eg, n=2) TRP-related indices (eg, TRP index/CORESET pool index).

If multiple (two) TCI states correspond to one CORESET, the UE may decide to apply the multiple TCI states to a specific DL channel/signal (for example, PDSCH).

《Embodiment 3-2》
The UE determines the "indicated TCI state (joint TCI state/DL (separate) TCI state)" for the index for the TRP with a first value (e.g., 0) and the index for the TRP with a second value (e.g., 1). The “indicated TCI state (joint TCI state/DL (separate) TCI state)” for the index may be applied to a specific DL channel/signal (eg, PDSCH).

At this time, the UE may determine a total of n QCL assumptions for indexes related to n (for example, n=2) TRPs.

《Embodiment 3-3》
Either of the above embodiments 3-1 and 3-2 may be selected/applied based on specific conditions.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with the PCI of the serving cell (i.e., intra-cell) ), the UE may decide to apply the above embodiment 3-2.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with a PCI different from the serving cell's PCI (i.e., inter-cell ), the UE may decide to apply the above embodiment 3-1.

Furthermore, when Embodiment 3-2 is applied in inter-cell, the UE may switch to intra-cell operation. The base station may instruct the UE regarding the switching. The instruction may be given by RRC/MAC CE/DCI.

At least one of the above embodiments 3-1 to 3-3 may be applied (only) when specific RRC parameters are configured for the UE. If not, the UE uses the above-mentioned Rel. The method described in Default QCL in No. 17 may be applied.

The specific RRC parameters/settings may be, for example, a parameter that enables two default TCI states (e.g., "enableTwoDefaultTCI-States"), or a Rel. It may be a specific parameter defined after 18.

According to the third embodiment, TCI state/QCL assumptions can be appropriately applied to a DL channel/signal (for example, PDSCH) that uses multiple TRPs of a single DCI.

<Fourth embodiment>
The fourth embodiment relates to TCI status/QCL of a channel in single DCI-based multi-TRP.

The particular method may be based on a TCI state corresponding to a particular TCI code point or a unified TCI state corresponding to an index regarding a particular transmission/reception point (TRP). The specific method may be, for example, the method described in at least one of Embodiments 4-1 to 4-3 below.

《Embodiment 4-1》
The UE may apply QCL assumptions/TCI states corresponding to specific TCI code points to specific DL channels/signals (eg, A-CSI-RS).

When the "TCI state indicated"/"TCI state set" is applied to the CORESET, the "TCI state indicated"/"TCI state set" is a specific DL channel/signal (e.g. , (triggered) A-CSI-RS).

When multiple (two) TCI states correspond to one CORESET, the UE assigns any one TCI state (for example, the selected first TCI state) among the multiple TCI states to a specific DL channel. / signals (eg, (triggered) A-CSI-RS).

《Embodiment 4-2》
The UE applies one of a plurality of "indicated TCI states (joint TCI state/DL (separate) TCI state)" to a specific DL channel/signal (for example, A-CSI-RS). Good too.

For example, the UE selects the first "indicated TCI state (joint TCI state/DL (separate) TCI state)" of the plural "indicated TCI states (joint TCI state/DL (separate) TCI state)". ” may be applied to a particular DL channel/signal (eg, A-CSI-RS).

For example, the UE determines the "indicated TCI state (joint TCI state/DL (separate) TCI state)" for the index for the TRP of the first (or second) value (e.g., 0 (or 1)). may be applied to a specific DL channel/signal (eg, A-CSI-RS).

《Embodiment 4-3》
Either of the above embodiments 4-1 and 4-2 may be selected/applied based on specific conditions.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with the PCI of the serving cell (i.e., intra-cell) ), the UE may decide to apply the above embodiment 4-2.

For example, if any or all (both) "indicated TCI states (joint TCI state/DL (separate) TCI state)" are associated with a PCI different from the serving cell's PCI (i.e., inter-cell ), the UE may decide to apply the above embodiment 4-1.

The effects of this embodiment are similar to those described in Embodiment 3-3.

Furthermore, when Embodiment 4-2 is applied in inter-cell, the UE may switch to intra-cell operation. The base station may instruct the UE regarding the switching. The instruction may be given by RRC/MAC CE/DCI.

At least one of the above embodiments 4-1 to 4-3 may be applied (only) when specific RRC parameters are configured for the UE. If not, the UE uses the above-mentioned Rel. The method described in Default QCL in No. 17 may be applied.

According to the fourth embodiment, TCI state/QCL assumptions can be appropriately applied to DL channels/signals (for example, A-CSI-RS) that utilize multiple TRPs of a single DCI.

<Variations of the third/fourth embodiment>
Below, the TCI state corresponding to the lowest TCI code point selected by the UE described in the third/fourth embodiment (Embodiment 3-1/4-1) will be described.

《Instruction of joint TCI status》
If joint TCI states are indicated, one TCI code point may correspond to one or more (eg, two) TCI states.

In embodiment 3-1/4-1, the lowest TCI code point determined by the UE is the lowest TCI code point among the TCI code points to which multiple (e.g., two) TCI states correspond. Good too.

FIG. 11A is a diagram illustrating an example of a method for selecting a TCI code point when a joint TCI state is specified. As shown in FIG. 11A, the correspondence between TCI code points and joint TCI states (first/second joint TCI states) is set in the UE.

Based on the correspondence relationship, the UE selects the TCI state (i.e., the TCI state of the lowest TCI code point (TCI code point "000" in FIG. TCI state #0 is used as the first joint TCI state, and TCI state #8) is used as the second joint TCI state.

《Instruction of separate TCI status》
If separate TCI states are indicated, one TCI code point may correspond to zero or more DL TCI states and zero or more UL TCI states.

In embodiment 3-1/4-1, the lowest TCI code point determined by the UE is the lowest TCI code point among the TCI code points to which multiple (for example, two) DL TCI states correspond. You can.

FIG. 11B is a diagram illustrating an example of a method for selecting a TCI code point when a DL TCI state is specified. As shown in FIG. 11B, the correspondence between TCI code points and TCI states (first/second UL/DL TCI states) is set in the UE.

Based on the correspondence relationship, the UE selects the TCI state (i.e., the TCI state of the lowest TCI code point (TCI code point "100" in FIG. 11B) in which two DL TCI states correspond to one TCI code point). TCI state #4 is used as the first DL TCI state, and TCI state #6 is used as the second DL TCI state.

<Fifth embodiment>
In the existing specifications (Rel.15-17), for an A-CSI-RS whose scheduling (triggering) offset is smaller than a threshold, if another DL signal exists in the same symbol as the symbol of the A-CSI-RS, In this case, the QCL assumption of the A-CSI-RS is derived based on the QCL of the other DL signals.

In this embodiment, when a unified TCI state is set, for an A-CSI-RS whose scheduling (triggering) offset is smaller than a threshold, another DL signal is present in the same symbol as the symbol of the A-CSI-RS. The case where it exists will be explained.

《Embodiment 5-1》
A plurality of (for example, two) TCI states (joint/DL TCI states) may correspond to the other DL signal.

The other DL signal may be, for example, a multi-TRP PDSCH with multiple active joint/DL TCI states, or a multi-TRP PDSCH with multiple active joint/DL TCI states, or a multi-TRP PDSCH with multiple active joint/DL TCI states. It may be an SFN PDSCH with multiple joint/DL TCI states.

The UE may apply any one of multiple TCI states corresponding to the other DL signal to the A-CSI-RS.

The UE may select/determine one of the multiple TCI states corresponding to the other DL signal based on a specific method.

The specific method may be a method described in at least one of options 5-1-1 to 5-1-3 described below.

[Option 5-1-1]
The UE may select/determine one of multiple TCI states (joint/DL TCI state) corresponding to the other DL signal based on the DCI that triggers the A-CSI-RS (triggering DCI). good.

For example, the UE determines to apply the QCL assumption of the DL signal corresponding to the TRP-related index (e.g., TRP index/CORESET pool index) of the triggering DCI (CORESET associated with the triggering DCI) to the A-CSI-RS. You may.

FIG. 12 is a diagram illustrating an example of application of the TCI status according to option 5-1-1. In the example shown in FIG. 12, the UE is triggered to A-CSI-RS by DCI. Other DL signals exist in the same symbol as the A-CSI-RS. Note that the period from DCI to A-CSI-RS is smaller than a specific threshold.

In the example shown in FIG. 12, the UE is instructed to have TCI state #3 as the first indicated joint/DL TCI state and TCI state #5 as the second indicated joint/DL TCI state. Ru. Also, in the example shown in FIG. 12, the DCI (CORESET) is set/defined to follow the first indicated joint/DL TCI state, and the other DL signals are set to follow both of the two indicated TCI states. / stipulated.

In this case, the UE applies the first indicated TCI state (TCI state #3), which is the TCI state corresponding to DCI, to the reception of the A-CSI-RS. In other words, the UE applies the first TCI state of the two TCI states corresponding to other DL signals.

[Modification of option 5-1-1]
A plurality of (for example, two) "TCI states to be set" may correspond to other DL signals.

The other DL signal may be a PDSCH.

The PDSCH may correspond to a common search space (CSS) scheduling CORESET. The CSS may be a CSS other than a specific type (for example, type 3) of CSS. An RRC parameter (for example, "followUnifiedTCIstate") indicating that the unified TCI state is followed does not need to be set for the scheduling CORESET.

The UE may apply a specific (eg, first) "TCI state to be set" among the plurality of "TCI states to be set" to the A-CSI-RS.

[Option 5-1-2]
The UE may select/determine one of a plurality of TCI states (joint/DL TCI states) corresponding to the other DL signal according to a specific rule.

For example, the UE may decide to apply the first (or second) TCI state among the plurality of TCI states corresponding to the other DL signal to the A-CSI-RS.

[Option 5-1-3]
The UE may select/determine one of a plurality of TCI states (joint/DL TCI state) corresponding to the other DL signal based on the RRC settings.

For example, the UE may use the RRC configuration to determine which TCI state's QCL assumption to apply to the A-CSI-RS among a plurality of TCI states corresponding to the other DL signal. .

《Embodiment 5-2》
One TCI state (joint/DL TCI state) may correspond to the other DL signal.

The other DL signal may be, for example, a single TRP PDSCH with one active joint/DL TCI state, or an aperiodic (A-TRP PDSCH with one active joint/DL TCI state). -)/semi-persistent (SP)/periodic (P-) CSI-RS.

[Option 5-2-1]
The UE may apply one TCI state corresponding to the other DL signal to the A-CSI-RS.

[Option 5-2-2]
The UE may be indicated with multiple (eg, two) "indicated TCI states."

The UE selects/determines one TCI state from the "indicated TCI states" based on the index related to the TRP related to the triggering DCI (for example, TRP index/CORESET pool index), and - May be applied to RS (option 5-2-2-1).

The UE may select/determine one TCI state among the "indicated TCI states" based on a specific rule and apply it to the A-CSI-RS (option 5-2-2- 2). For example, the specific rule may be that the UE selects/determines the first indicated TCI state among a plurality of "indicated TCI states".

The UE may select/determine one TCI state from the "indicated TCI states" based on the RRC signaling and apply it to the A-CSI-RS (option 5-2-2-3). ).

Note that the other DL signal in the fifth embodiment may be a DL signal (PDSCH/A-CSI-RS) that satisfies that the scheduling (triggering) offset is greater than or equal to a specific threshold value.

According to the fifth embodiment, even if another DL signal exists in the same symbol as an A-CSI-RS symbol whose scheduling offset is smaller than a specific threshold, the A-CSI-RS is appropriately The TCI state/QCL to apply can be determined.

<Sixth embodiment>
Existing specifications (before Rel. 17) do not allow the UE to assume different default QCLs for buffering DL signals in different BWP/CCs.

For example, in the example shown in FIG. 13, a case is shown in which a single TRP is set in BWP #1 in CC #1, and a multi-TRP of multi-DCI is set in BWP #1 in CC #2.

The expected behavior of the UE's QCL in such cases has not been sufficiently studied.

In the present embodiment, the operation of the UE that can handle such a case will be described below.

The UE may receive configurations related to specific types. The specific type may be any one of a single TRP, a multi-DCI multi-TRP, and a single-DCI multi-TRP.

The UE may not assume/expect to receive different types of configurations in one (same) band.

For example, the UE does not have to assume/expect that a single TRP is configured in BWP #1 in CC #1 and that multi-DCI multi-TRP is configured in BWP #1 in CC #2.

In each BWP/CC, the settings for multi-TRP for single DCI and the settings for multi-TRP for multi-DCI are the default QCL settings (enabler) for multi-TRP for single DCI, and the settings for multi-DCI for multi-TRP, respectively. It may be a default QCL setting (enabler) in a multi-TRP.

For multiple (eg, all) CC/BWPs in one band, the UE may assume to apply the QCL assumption (default QCL) of the specific BWP/CC ID in that band.

The specific BWP/CC ID may be, for example, the lowest (minimum) BWP/CC ID within the band.

According to the sixth embodiment, even when using multiple BWP/CCs, it is possible to appropriately assume the QCL.

<Seventh embodiment>
Rel. In the HST-SFN scheme in No. 17, the operation of the UE when the DL signal of the same symbol as the A-CSI-RS symbol is a PDSCH with two TCI states has not been sufficiently studied.

In this embodiment, the operation of the UE in such a case will be described below.

For an A-CSI-RS whose scheduling (triggering) offset is smaller than a threshold, another DL signal may exist in the same symbol as the symbol of the A-CSI-RS.

The other DL signal may be a PDSCH with multiple (two) TCI states.

At this time, the UE may apply the first TCI state among the plurality of TCI states of the PDSCH to reception of the A-CSI-RS.

According to the seventh embodiment, even when using the HST-SFN scheme, it is possible to appropriately assume the QCL.

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

The particular UE capability may indicate at least one of the following:
- Specific processing/operation/control/information regarding at least one of the above embodiments (e.g., unified TCI state, application of default QCL/TCI state, application of default QCL/TCI state in unified TCI state, and HST/TCI state) applying default QCL/TCI conditions in the SFN;

Further, the specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency) or a capability that is applied across all frequencies (e.g., cell, band, band combination, BWP, component carrier, etc.). or a combination thereof), or it may be a capability for each frequency range (for example, Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2). Alternatively, it may be a capability for each subcarrier spacing (SCS), or a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

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

Also, at least one of the embodiments described above may be applied when the UE is configured with specific information related to the embodiment described above by upper layer signaling. For example, the specific information may include information indicating that the default TCI state is enabled, information indicating that the default TCI state is enabled for a unified TCI state, and information indicating that the default TCI state is enabled for a unified TCI state, or an optional information for a specific release (e.g., Rel. 18). It may also be the RRC parameters of .

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

(Appendix A)
Regarding one embodiment of the present disclosure, the following invention will be added.
[Appendix A-1]
a plurality of receivers configured to receive configuration parameters related to a unified transmission configuration indication (TCI) state, and receive instructions regarding the unified TCI state and downlink control information (DCI) for scheduling or triggering a downlink (DL) signal; If a controlled resource set (CORESET) pool index with a value of A terminal comprising: a control unit that determines a TCI state or QCL assumption to be applied to the specific DL signal based on a corresponding TCI state or pseudo-colocation (QCL assumption).
[Appendix A-2]
The terminal according to Appendix A-1, wherein the control unit applies a QCL assumption corresponding to the lowest CORESET ID of the same CORESET pool index in the latest monitoring slot to the DL signal.
[Appendix A-3]
When the DL signal is a physical downlink shared channel (PDSCH), the controller applies a plurality of unified TCI states corresponding to each of the plurality of values of the CORESET pool index to the PDSCH, and when the DL signal If it is an aperiodic channel state information reference signal (A-CSI-RS), the control unit assigns one unified TCI state corresponding to one of the plurality of values of the CORESET pool index to the A-CSI-RS. Terminals described in Appendix A-1 or Appendix A-2 applicable to.
[Appendix A-4]
If the unified TCI state based on the instruction is associated with the same physical cell ID as the physical cell ID of the serving cell, the controller assigns at least one unified TCI state corresponding to the multi-valued CORESET pool index to the DL signal. and the unified TCI state based on the indication is associated with a physical cell ID different from the physical cell ID of the serving cell, the control unit corresponds to the lowest CORESET ID of the same CORESET pool index in the latest monitoring slot. The terminal according to any one of appendices A-1 to A-3, which applies QCL assumptions to the DL signal.

(Appendix B)
Regarding one embodiment of the present disclosure, the following invention will be added.
[Appendix B-1]
a receiver for receiving configuration parameters regarding a unified transmission configuration indication (TCI) state, and receiving an instruction regarding the unified TCI state and downlink control information (DCI) for scheduling or triggering a downlink (DL) signal; If one TCI code point corresponds to multiple TCI states, and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the TCI corresponding to the specific TCI code point A control unit that determines a TCI state or QCL assumption to be applied to the specific DL signal based on a unified TCI state corresponding to a state or an index regarding a specific transmission/reception point (TRP).
[Appendix B-2]
The terminal according to Appendix B-1, wherein the control unit applies a TCI state of the lowest TCI code point corresponding to a plurality of different TCI states to the DL signal.
[Appendix B-3]
When the DL signal is a physical downlink shared channel (PDSCH), the control unit applies a plurality of unified TCI states corresponding to each of the indexes regarding the TRP of a plurality of values to the PDSCH, and when the DL signal In the case of an aperiodic channel state information reference signal (A-CSI-RS), the control unit sets one unified TCI state corresponding to one of the indices regarding the TRP of the plurality of values to the A-CSI-RS. Terminals described in Appendix B-1 or B-2 applicable to RS.
[Appendix B-4]
If the unified TCI state based on the instruction is associated with the same physical cell ID as the physical cell ID of the serving cell, the controller assigns at least one unified TCI state corresponding to an index regarding the TRP of a plurality of values to the DL signal. If the unified TCI state based on the instruction is associated with a physical cell ID different from the physical cell ID of the serving cell, the control unit sets the TCI state of the lowest TCI code point corresponding to a plurality of different TCI states as the A terminal according to any one of Appendix B-1 to Appendix B-3, which is applied to DL signals.

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

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

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

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

base stations

11 and 12 are not distinguished, they will be collectively referred to as base station 10.

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

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

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

The plurality of base stations 10 may be connected by wire (for example, optical fiber, X2 interface, etc. compliant with Common Public Radio Interface (CPRI)) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between

base stations

11 and 12, base station 11, which is an upper station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a node.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

(base station)
FIG. 15 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The transmitting/receiving unit 120 transmits configuration parameters of a unified transmission configuration instruction (TCI) state, and schedules or triggers an instruction regarding the unified TCI state (for example, beam instruction DCI/MAC CE) and a downlink (DL) signal. Downlink control information (DCI) may also be transmitted. If a control resource set (CORESET) pool index of multiple values is set and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the control unit 110 specifies The TCI state or QCL assumption to be applied to the specific DL signal may be indicated based on the TCI state or pseudo-colocation (QCL assumption) corresponding to the CORESET pool index of (first/second embodiment) .

The transmitting/receiving unit 120 receives configuration parameters related to a unified transmission configuration instruction (TCI) state, and schedules or triggers an instruction related to the unified TCI state (for example, beam instruction DCI/MAC CE) and a downlink (DL) signal. Downlink control information (DCI) may also be transmitted. If at least one TCI code point corresponds to a plurality of TCI states and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the control unit 110 controls The TCI state or QCL assumption to be applied to the specific DL signal may be indicated based on the TCI state corresponding to the code point or the unified TCI state corresponding to the index regarding the specific transmit/receive point (TRP). 3/Fourth embodiment).

(user terminal)
FIG. 16 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The transmitting/receiving unit 220 receives configuration parameters related to a unified transmission configuration instruction (TCI) state, and schedules or triggers an instruction related to the unified TCI state (for example, beam instruction DCI/MAC CE) and a downlink (DL) signal. Downlink control information (DCI) may also be received. When a plurality of values of control resource set (CORESET) pool indexes are set, and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the specific CORESET pool index The TCI state or QCL assumption to be applied to the specific DL signal may be determined based on the TCI state or pseudo-colocation (QCL assumption) corresponding to the specific DL signal (first/second embodiment).

The control unit 210 may apply the QCL assumption corresponding to the lowest CORESET ID of the same CORESET pool index in the latest monitoring slot to the DL signal (first/second embodiment).

When the DL signal is a physical downlink shared channel (PDSCH), the control unit 210 may apply a plurality of unified TCI states corresponding to each of the plurality of values of the CORESET pool index to the PDSCH (the first Embodiment 1). When the DL signal is an aperiodic channel state information reference signal (A-CSI-RS), the control unit 210 assigns one unified TCI state corresponding to one of the plurality of values of the CORESET pool index to the A-CSI-RS. - May be applied to CSI-RS (second embodiment).

If the unified TCI state based on the instruction is associated with the same physical cell ID as that of the serving cell, the control unit 210 assigns at least one unified TCI state corresponding to the plurality of values of the CORESET pool index to the DL signal. May be applied. If the unified TCI state based on the instruction is associated with a physical cell ID different from the physical cell ID of the serving cell, the control unit 210 sets a QCL assumption corresponding to the lowest CORESET ID of the same CORESET pool index in the latest monitoring slot. It may be applied to the DL signal (third/fourth embodiment).

The transmitting/receiving unit 220 receives configuration parameters related to a unified transmission configuration instruction (TCI) state, and schedules or triggers an instruction related to the unified TCI state (for example, beam instruction DCI/MAC CE) and a downlink (DL) signal. Downlink control information (DCI) may also be received. When at least one TCI code point corresponds to a plurality of TCI states and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the control unit 210 controls The TCI state or QCL assumption to be applied to the specific DL signal may be determined based on the TCI state corresponding to the code point or the unified TCI state corresponding to the index regarding the specific transmit/receive point (TRP). 3/Fourth embodiment).

The control unit 210 may apply the TCI state of the lowest TCI code point corresponding to a plurality of different TCI states to the DL signal (third/fourth embodiment).

When the DL signal is a physical downlink shared channel (PDSCH), the control unit 210 may apply to the PDSCH a plurality of unified TCI states corresponding to each of the indexes regarding the TRP of a plurality of values. Embodiment 3). When the DL signal is an aperiodic channel state information reference signal (A-CSI-RS), the control unit 210 sets one unified TCI state corresponding to one of the indices regarding the TRP of the plurality of values to the It may also be applied to A-CSI-RS (fourth embodiment).

When the unified TCI state based on the instruction is associated with the same physical cell ID as that of the serving cell, the control unit 210 assigns at least one unified TCI state corresponding to the index regarding the TRP of a plurality of values to the DL signal. May be applied. When the unified TCI state based on the instruction is associated with a physical cell ID different from the physical cell ID of the serving cell, the control unit 210 assigns the TCI state of the lowest TCI code point corresponding to the plurality of different TCI states to the DL signal. It may also be applied (third/fourth embodiment).

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

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

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 17 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. .

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

In the present disclosure, a base station transmitting information to a terminal may be interchanged with the base station instructing the terminal to control/operate based on the information.

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

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

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

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

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

FIG. 18 is a diagram illustrating an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (current sensor 50, (including a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service section 59, and a communication module 60. Be prepared.

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

The electronic control unit 49 includes a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input/output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control section 49 may be called an electronic control unit (ECU).

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

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

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

The driving support system unit 64 includes millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (for example, Global Navigation Satellite System (GNSS), etc.), and map information (for example, High Definition (HD)). maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMUs), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial Intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving burden, as well as one or more devices that control these devices. It consists of an ECU. Further, the driving support system section 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic driving function.

The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 communicates via the communication port 63 with a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, which are included in the vehicle 40. Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.

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

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

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

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

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

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

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

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

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is an integer or decimal number, for example)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (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. The present invention may be applied to systems to be used, next-generation systems expanded, modified, created, or defined based on these systems. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Claims

a receiving unit for receiving configuration parameters regarding a unified transmission configuration indication (TCI) state, and receiving an instruction regarding the unified TCI state and downlink control information (DCI) for scheduling or triggering a downlink (DL) signal;
When a plurality of values of control resource set (CORESET) pool indexes are set, and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the specific CORESET pool index a control unit that determines a TCI state or QCL assumption to be applied to the specific DL signal based on a TCI state or pseudo-colocation (QCL assumption) corresponding to the terminal.
The terminal according to claim 1, wherein the control unit applies a QCL assumption corresponding to the lowest CORESET ID of the same CORESET pool index in the latest monitoring slot to the DL signal.
When the DL signal is a physical downlink shared channel (PDSCH), the control unit applies a plurality of unified TCI states corresponding to each of the plurality of values of the CORESET pool index to the PDSCH;
When the DL signal is an aperiodic channel state information reference signal (A-CSI-RS), the control unit sets one unified TCI state corresponding to any of the plurality of values of the CORESET pool index to the A-CSI-RS. - The terminal according to claim 1, which is applied to CSI-RS.
If the unified TCI state based on the instruction is associated with the same physical cell ID as the physical cell ID of the serving cell, the controller assigns at least one unified TCI state corresponding to the multi-valued CORESET pool index to the DL signal. apply,
If the unified TCI state based on the indication is associated with a physical cell ID different from the physical cell ID of the serving cell, the controller sets a QCL assumption corresponding to the lowest CORESET ID of the same CORESET pool index in the latest monitoring slot. The terminal according to claim 1, applied to the DL signal.
receiving configuration parameters for a unified transmission configuration indication (TCI) state, and receiving instructions regarding the unified TCI state and downlink control information (DCI) for scheduling or triggering downlink (DL) signals;
When a plurality of values of control resource set (CORESET) pool indexes are set, and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the specific CORESET pool index A wireless communication method for a terminal, comprising: determining a TCI state or QCL assumption to be applied to the specific DL signal based on a TCI state or pseudo-colocation (QCL assumption) corresponding to the specific DL signal.
a transmitting unit configured to transmit configuration parameters for a unified transmission configuration indication (TCI) state, and to transmit downlink control information (DCI) for scheduling or triggering a downlink (DL) signal and an instruction regarding the unified TCI state;
When a plurality of values of control resource set (CORESET) pool indexes are set, and the value of the period from reception of the DCI to reception of the DL signal is smaller than a threshold, the specific CORESET pool index a control unit that instructs a TCI state or QCL assumption to be applied to the specific DL signal based on a TCI state or pseudo-colocation (QCL assumption) corresponding to the base station.