Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure is characterized by including a reception unit that receives one piece of downlink control information (DCI) for indicating a plurality of transmission configuration indicator (TCI) states and a control unit that determines which TCI state from among the plurality of TCI states is to be applied to a signal on the basis of one or both of an index related to a transmit / receive point associated with a control resource set that schedules or triggers the signal to which the TCI state is to be applied and an index related to the signal, wherein each of the plurality of TCI states is a TCI state to be applied to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state to be applied to a DL signal and a TCI state to be applied to a UL signal. The one embodiment of the present disclosure makes it possible to indicate the TCI state appropriately.

Description

Terminal, wireless communication method and base station

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] In future wireless communication systems (e.g., NR), it is being considered that user terminals (terminals, user terminals, User Equipment (UE)) will control transmission and reception processing based on information regarding quasi-co-location (QCL) (QCL assumptions / Transmission Configuration Indication (TCI) state / spatial relationship).

[0006] It is being considered to apply the set / activated / indicated TCI state to multiple types of signals (channels / RS). However, there are cases where the method for indicating the TCI state is unclear. If the method for indicating the TCI state is unclear, it may lead to a deterioration in communication quality, a decrease in throughput, etc.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately perform a TCI status indication.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives one downlink control information (DCI) for indicating a plurality of transmission configuration indication (TCI) states, and a control unit that determines which of the plurality of TCI states to apply to a signal based on at least one of an index related to a transmission / reception point associated with a control resource set that schedules or triggers a signal to which a TCI state is to be applied and an index related to the signal, wherein each of the plurality of TCI states is a TCI state that is applied to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state that is applied to a DL signal and a TCI state that is applied to a UL signal.

[0009] According to one aspect of the present disclosure, the TCI status can be appropriately indicated.

[0010] Figures 1A and 1B illustrate an example of communication between a mobile station and a transmission point (e.g., remote radio head). Figures 2A to 2C illustrate an example of schemes 0 to 2 for SFN. Figures 3A and 3B illustrate an example of scheme 1. Figures 4A to 4C illustrate an example of a Doppler pre-compensation scheme. Figure 5 illustrates an example of simultaneous beam updating across multiple CCs. Figures 6A and 6B illustrate an example of a common beam. Figure 7 illustrates an example of a MAC CE defined in Rel. 16. Figure 8 illustrates another example of a MAC CE defined in Rel. 16. Figure 9 illustrates another example of a MAC CE defined in Rel. 16. Figures 10A and 10B illustrate an example of a single DCI-based multi-TRP transmission and a multi-DCI-based multi-TRP transmission, respectively. Figures 11A and 11B illustrate an example of a TCI field in a DCI. 12A and 12B are diagrams illustrating an example of setting / indicating a joint TCI state in a single DCI-based multi-TRP. FIGS. 13A and 13B are diagrams illustrating an example of setting / indicating a separate TCI state in a single DCI-based multi-TRP. FIGS. 14A and 14B are diagrams illustrating an example of setting / indicating a joint TCI state corresponding to a first value of a CORESET pool index in a multi-DCI-based multi-TRP. FIGS. 15A and 15B are diagrams illustrating an example of setting / indicating a joint TCI state corresponding to a second value of a CORESET pool index in a multi-DCI-based multi-TRP. FIG. 16 is a diagram illustrating an example of setting / indicating a TCI state according to the first embodiment. FIG. 17 is a diagram illustrating an example of selecting / applying a TCI state according to embodiment 2-1. FIG. 18 is a diagram illustrating an example of selecting / applying a TCI state according to embodiment 2-2. FIG. 19 is a diagram illustrating another example of selecting / applying a TCI state according to embodiment 2-2. 20A to 20C are diagrams illustrating an example of a DCI field according to a modification of embodiment 2-1 / 2-2. FIG. 21 is a diagram illustrating an example of selection / application of a TCI state according to a modification of embodiment 2-1 / 2-2. FIG. 22A and FIG. 22B are diagrams illustrating an example of selection / application of a TCI state according to embodiment 2-3.FIG. 23 is a diagram showing another example of selection / application of a TCI state according to embodiment 2-3. FIG. 24 is a diagram showing an example of a TCI state list according to embodiment 3-1. FIG. 25 is a diagram showing an example of a TCI state list according to embodiment 3-2. FIG. 26 is a diagram showing an example of a MAC CE configuration according to option 1. FIG. 27 is a diagram showing an example of a MAC CE configuration according to option 2-1. FIG. 28 is a diagram showing an example of a MAC CE configuration according to option 2-3. FIG. 29 is a diagram showing an example of a MAC CE configuration according to option 2-4 / 2-5. FIG. 30 is a diagram showing an example of a MAC CE configuration according to option 2-6. FIGS. 31A and 31B are diagrams showing an example of a MAC CE configuration according to option 2-7. FIG. 32 is a diagram showing an example of a MAC CE configuration according to option 2-8. FIG. 33 is a diagram showing another example of a MAC CE configuration according to option 2-8. FIG. 34 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 35 is a diagram showing an example of the configuration of a base station according to an embodiment. Fig. 36 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. Fig. 37 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. Fig. 38 is a diagram illustrating an example of a vehicle according to an embodiment.

[0011] (TCI, spatial relationship, QCL) In NR, it is considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0012] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0013] The TCI state is information about the Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or signal.

[0014] The QCL is an index indicating the statistical properties of signals / channels. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial parameter (e.g., a spatial Rx parameter) is the same between these different signals / channels (i.e., the signals / channels have a QCL with respect to at least one of these).

[0015] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be identified based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with sQCL (spatial QCL).

[0016] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows: QCL type A (QCL-A): Doppler shift, Doppler spread, mean delay, and delay spread QCL type B (QCL-B): Doppler shift and Doppler spread QCL type C (QCL-C): Doppler shift and mean delay QCL type D (QCL-D): Spatial reception parameters.

[0017] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0018] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumption of the signal / channel.

[0019] The TCI state may be, for example, information about the QCL between the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0020] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0021] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0022] Furthermore, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0023] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS / PBCH block.

[0024] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0025] For the PDCCH and PDSCH, the QCL Type A RS is always configured, and the QCL Type D RS may be configured additionally. Since it is difficult to estimate Doppler shift, delay, etc. by one-shot reception of the DMRS, the QCL Type A RS is used to improve the accuracy of channel estimation. The QCL Type D RS is used to determine the receiving beam when receiving the DMRS.

[0026] 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 status of the PDSCH. By notifying the TCI status, the UE can use information obtained from past periodic reception / measurement results of TRS1-1 for reception / channel estimation of the DMRS for the PDSCH. In this case, the QCL source of the PDSCH is TRS1-1, and the QCL target is the DMRS for the PDSCH.

[0027] (Default TCI State / Default Spatial Relationship / Default PL-RS) In Rel. 16, PDSCH may be scheduled with a DCI having a TCI field. The TCI state for the 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 a maximum of 3 bits.

[0028] In RRC connected mode, if the first TCI information element in DCI (higher layer parameter tci-PresentInDCI) is set to "enabled" for a CORESET scheduling a PDSCH, the UE assumes that the TCI field is present in DCI format 1_1 of the PDCCH transmitted in this CORESET.

[0029] Furthermore, if the TCI information element in the second DCI (higher layer parameter tci-PresentInDCI-1-2) for the CORESET scheduling the PDSCH is configured in the UE, the UE assumes that a TCI field with the DCI field size indicated in the TCI information element in the second DCI is present in DCI format 1_2 of the PDSCH transmitted in the CORESET.

[0030] Also, in Rel. 16, PDSCH may be scheduled by DCI without a TCI field. The DCI format of this DCI may be DCI format 1_0 or DCI format 1_1 / 1_2 in the case where the TCI information element in the DCI (the higher layer parameter tci-PresentInDCI or tci-PresentInDCI-1-2) is not configured (enabled). When PDSCH is scheduled by DCI without a TCI field, if the time offset between the reception of the DL DCI (the DCI that schedules the PDSCH (scheduling DCI)) and the corresponding PDSCH (the PDSCH scheduled by this DCI) is equal to or greater than 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 CORESET (e.g., the scheduling DCI).

[0031] In RRC connected mode, both when the TCI information element in DCI (higher layer parameters tci-PresentInDCI and tci-PresentInDCI-1-2) is set to "enabled" and when the TCI information element in DCI is not set, if the time offset between the reception of a DL DCI (a DCI scheduling a PDSCH) and the corresponding PDSCH (the PDSCH scheduled by that DCI) is less than a threshold (timeDurationForQCL) (applicability condition, first condition), in the case of non-cross-carrier scheduling, the TCI state of the PDSCH (default TCI state) may be the TCI state of the lowest CORESET ID in the latest slot in the active DL BWP of that CC (for a particular UL signal). 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.

[0032] In Rel. 15, separate MAC CEs are required for the activation / deactivation of the PUCCH spatial relation and for the activation / deactivation of the SRS spatial relation. The PUSCH spatial relation follows the SRS spatial relation.

[0033] In Rel. 16, at least one of the MAC CE for activation / deactivation of the PUCCH spatial relationship and the MAC CE for activation / deactivation of the SRS spatial relationship may not be used.

[0034] If neither the spatial relationship nor the PL-RS for the PUCCH is configured in FR2 (applicable condition, second condition), default assumptions of the spatial relationship and the PL-RS for the PUCCH (default spatial relationship and default PL-RS) are applied. If neither the spatial relationship nor the PL-RS for the SRS (SRS resource for the SRS or SRS resource corresponding to the SRI in DCI format 0_1 ​​that schedules the PUSCH) is configured in FR2 (applicable condition, second condition), default assumptions of the spatial relationship and the PL-RS for the PUSCH and SRS scheduled by DCI format 0_1 ​​(default spatial relationship and default PL-RS) are applied.

[0035] If a CORESET is configured in the active DL BWP on that CC (if applicable), the default spatial relationship and default PL-RS may be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in that active DL BWP. If a CORESET is not 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 PDSCH ID in that active DL BWP.

[0036] In Rel. 15, the spatial relationship of the PUCCH 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 the PUCCHs on the same CC. The network needs to update the PUCCH spatial relationship on all SCells, even if no PUCCH is transmitted on the SCell.

[0037] In Rel. 16, PUCCH configuration is not required 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 the CC for a PUSCH scheduled by DCI format 0_0 (applicable condition, second condition), the default spatial relationship and default PL-RS are applied to the PUSCH.

[0038] The application conditions for the default spatial relationship / default PL-RS for SRS may include a default beam path loss enable information element for SRS (upper layer parameter enableDefaultBeamPlForSRS) being set to valid. The application conditions for the default spatial relationship / default PL-RS for PUCCH may include a default beam path loss enable information element for PUCCH (upper layer parameter enableDefaultBeamPlForPUCCH) being set to valid. The application conditions for the default spatial relationship / default PL-RS for PUSCH scheduled by DCI format 0_0 may include a default beam path loss enable information element for PUSCH scheduled by DCI format 0_0 (upper layer parameter enableDefaultBeamPlForPUSCH0_0) being set to valid.

[0039] In Rel. 16, if an RRC parameter (a parameter enabling a default beam PL for PUCCH (enableDefaultBeamPL-ForPUCCH), a parameter enabling a default beam PL for PUSCH (enableDefaultBeamPL-ForPUSCH0_0), or a parameter enabling a default beam PL for SRS (enableDefaultBeamPL-ForSRS)) is configured for a UE and a spatial relationship or PL-RS is not configured, the UE applies the default spatial relationship / PL-RS.

[0040] This threshold may also be called 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. This threshold may be reported by the UE as UE capability (per subcarrier spacing).

[0041] If the offset (scheduling offset) between the reception of a DL DCI and the corresponding PDSCH is smaller than a threshold timeDurationForQCL, and at least one TCI state configured for the serving cell of the scheduled PDSCH includes "QCL type D", and the UE configures the two default TCI enable information element (enableTwoDefaultTCIStates-r16), and at least one TCI codepoint (the codepoint of the TCI field in the DL DCI) indicates two TCI states, the UE assumes that the PDSCH or the DMRS port of the PDSCH transmission occasion of the serving cell is quasi-colocated with the RS for the QCL parameters associated with the two TCI states corresponding to the lowest codepoints among the TCI codepoints containing two different TCI states (two-default QCL assumption decision rule). The 2 default TCI enable information element indicates that Rel. 16 operation of the 2 default TCI states for the PDSCH is enabled when at least one TCI codepoint is mapped to 2 TCI states.

[0042] As the default TCI state for PDSCH in Rel. 15 / 16, 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 are specified.

[0043] As default TCI states for aperiodic CSI-RS (A (aperiodic)-CSI-RS) in Rel. 15 / 16, 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 are specified.

[0044] In Rel. 15 / 16, the default spatial relationship and default PL-RS for each of PUSCH / PUCCH / SRS are specified.

[0045] (Multi-TRP) In NR, one or more transmission / reception points (TRP) (multi-TRP (MTRP)) are considered to perform DL transmission to a UE using one or more panels (multi-panels). Also, it is considered that a UE performs UL transmission to one or more TRPs using one or more panels.

[0046] Note that multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0047] Multi-TRPs (e.g., TRPs #1 and #2) may be connected by ideal / non-ideal backhauls to exchange information, data, etc. Each TRP of a 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.

[0048] In the NCJT, for example, TRP#1 modulates and layer-maps a first codeword to transmit a first PDSCH using a first number of layers (e.g., two layers) with a first precoding, and TRP#2 modulates and layer-maps a second codeword to transmit a second PDSCH using a second number of layers (e.g., two layers) with a second precoding.

[0049] Note that multiple PDSCHs (multi-PDSCHs) that are non-coherent may be defined as partially or completely overlapping in time and / or frequency domains, i.e., a first PDSCH from a first TRP and a second PDSCH from a second TRP may overlap in time and / or frequency resources.

[0050] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (QCL). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0051] Multiple PDSCHs from multiple TRPs (which may be referred to as multiple PDSCHs) may be scheduled using one DCI (single DCI, single PDCCH) (single-master mode, single-DCI based multi-TRP). Multiple PDSCHs from multiple TRPs may be scheduled using multiple DCIs (multiple DCI, multiple PDCCHs) (multi-master mode, multi-DCI based multi-TRP).

[0052] In URLLC for multi-TRP, it is considered that PDSCH (transport block (TB) or codeword (CW)) repetition across multi-TRP is supported. Repetition schemes (URLLC schemes, e.g., Schemes 1, 2a, 2b, 3, and 4) across multi-TRP in the frequency domain, layer (spatial) domain, or time domain are supported. In Scheme 1, multiple PDSCHs from multi-TRP are space division multiplexed (SDM). In Schemes 2a and 2b, PDSCHs from multi-TRP are frequency division multiplexed (FDM). In Scheme 2a, the redundancy version (RV) is the same for multi-TRP. In Scheme 2b, the RVs for multi-TRP may be the same or different. 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 in one slot. In scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different slots.

[0053] Such a multi-TRP scenario allows for more flexible transmission control using good quality channels.

[0054] In order to support multi-TRP transmission within a cell (with the same cell ID) and between cells (with different cell IDs) based on multiple PDCCHs, in the RRC configuration information for linking multiple pairs of PDCCHs and PDSCHs with multiple TRPs, one control resource set (CORESET) in the PDCCH configuration information (PDCCH-Config) may correspond to one TRP.

[0055] If at least one of the following conditions 1 and 2 is satisfied, the UE may determine that the transmission is a multi-TRP transmission based on the multi-DCI. In this case, the TRP may be replaced with the CORESET pool index. [Condition 1] A CORESET pool index of 1 is set. [Condition 2] Two different values ​​of the CORESET pool index (e.g., 0 and 1) are set.

[0056] If the following condition is met, the UE may determine that it is a multi-TRP based on a single DCI. In this case, two TRPs may be interpreted as two TCI states indicated by the MAC CE / DCI. [Condition] "Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE" is used to indicate one or two TCI states for one codepoint in the TCI field in the DCI.

[0057] The DCI for common beam instruction may be a UE-specific DCI format (e.g., DL DCI format (e.g., 1_1, 1_2), UL DCI format (e.g., 0_1, 0_2)), or may be a UE-group common DCI format.

[0058] (Multi-TRP PDCCH) For the reliability of a multi-TRP PDCCH based on a non-single frequency network (SFN), the following considerations 1 to 3 are considered: [Consideration 1] Coding / 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.

[0059] The following options for PDCCH repetition are considered: 1-2, 1-3, 2, 3.

[0060] [Option 1-2] Two sets of PDCCH candidates (within a given search space (SS) set) are associated with two TCI states of the CORESET, respectively, where the same CORESET, the same SS set, and PDCCH repetitions on different monitoring occasions are used.

[0061] [Options 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 and two SS sets are used.

[0062] [Option 2] One SS set is associated with two different CORESETs.

[0063] [Option 3] Two SS sets are associated with two CORESETs, respectively.

[0064] In this way, it is considered that two PDCCH candidates in two SS sets for PDCCH repetition are supported and the two SS sets are explicitly linked.

[0065] (SFN PDCCH) For PDCCH / CORESET specified in Rel. 15, one TCI state without CORESETPoolIndex (also referred to as TRP Info) is set to one CORESET.

[0066] Regarding the PDCCH / CORESET enhancements specified in Rel. 16, in multi-TRP based on multi-DCI, a CORESET pool index is configured for each CORESET.

[0067] In Rel. 17 and later, the following enhancements 1 and 2 regarding PDCCH / CORESET are being considered.

[0068] In the case where multiple antennas (small antennas, transmission / reception points) having the same cell ID form a single frequency network (SFN), up to two TCI states can be set / activated for one CORESET by higher layer signaling (RRC signaling / MAC CE) (Enhancement 1). SFN contributes to at least one of the operation and reliability improvement of HST (high speed train).

[0069] Furthermore, in repeated transmission of PDCCH (which may simply be referred to as "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. For one CORESET, one (maximum one) TCI state can be configured / activated by higher layer signaling (RRC signaling / MAC CE).

[0070] If two search space sets are associated with different CORESETs with different TCI states, this may mean a multi-TRP repeat transmission. If two search space sets are associated with the same CORESET (CORESET with the same TCI state), this may mean a single-TRP repeat transmission.

[0071] (HST) In LTE, placement of HST (high-speed train) in tunnels is difficult. Large antennas transmit both inside and outside the tunnel. For example, the transmission power of a large antenna is approximately 1 to 5 W. For handover purposes, it is important for the UE to transmit outside the tunnel before entering it. For example, the transmission power of a small antenna is approximately 250 mW. Multiple small antennas (transmitting and receiving points) with the same cell ID and a distance of 300 m form a single frequency network (SFN). All small antennas within the SFN transmit the same signal at the same time on the same PRB. It is assumed that a terminal transmits and receives signals to a single base station. In reality, multiple transmitting and receiving points transmit the same DL signal. When moving at high speed, transmitting and receiving points of several kilometers apart form a single cell. Handover occurs when crossing cells. This reduces the frequency of handovers.

[0072] In NR, it is assumed that a beam transmitted from a transmission point (e.g., RRH) is used to communicate with a terminal (hereinafter also referred to as a UE) included in a moving object (high speed train (HST)) such as a train moving at high speed. Existing systems (e.g., Rel. 15) support transmitting a unidirectional beam from an RRH to communicate with a moving object (see FIG. 1A).

[0073] 1A illustrates a case in which RRHs are installed along the moving path (or moving direction, traveling direction, or travel path) of a moving object, and a beam is formed from each RRH in the moving direction of the moving object. An RRH that forms a beam in one direction may be called a unidirectional RRH. In the example illustrated in FIG. 1A, the moving object receives a negative Doppler shift (−fD) from each RRH.

[0074] Here, we show a case where a beam is formed in the direction of travel of the moving body, but this is not limited to this, and a beam may be formed in the opposite direction to the direction of travel, or a beam may be formed in any direction regardless of the direction of travel of the moving body.

[0075] In Rel. 16 and later, it is assumed that multiple (e.g., two or more) beams are transmitted from the remote radio head (RRH). For example, it is assumed that beams are formed in both the moving direction of the mobile unit and the opposite direction (see FIG. 1B).

[0076] 1B shows a case where RRHs are installed along the movement path of the moving object, and each RRH forms a beam in both the moving direction of the moving object and the opposite direction of the moving direction. An RRH that forms beams in multiple directions (e.g., two directions) may be called a bi-directional RRH.

[0077] In this HST, the UE communicates as if it were a single TRP. In base station implementations, it is possible to transmit from multiple TRPs (same cell ID).

[0078] 1B, when two remote radio heads (RRH#1 and RRH#2) use SFN, the mobile station switches from a signal with a negative Doppler shift to a signal with a positive Doppler shift, which increases power, midway between the two remote radio heads. In this case, the maximum Doppler shift change range that requires correction is from −fD to +fD, which is twice as large as that in the case of unidirectional remote radio heads.

[0079] In the present disclosure, a positive Doppler shift may be interpreted as information about a positive Doppler shift, a Doppler shift in the positive (positive) direction, or Doppler information in the positive (positive) direction, and a negative Doppler shift may be interpreted as information about a negative Doppler shift, a Doppler shift in the negative (negative) direction, or Doppler information in the negative (negative) direction.

[0080] Here, as HST schemes, the following schemes 0 to 2 (HST scheme 0 to HST scheme 2) will be compared.

[0081] In scheme 0 of FIG. 2A, a tracking reference signal (TRS), a DMRS, and a PDSCH are transmitted in common (using the same time and frequency resources) to two TRPs (RRHs) (normal SFN, transparent SFN, HST-SFN).

[0082] In scheme 0, the UE receives DL channels / signals equivalent to a single TRP, so there is one TCI state for the PDSCH.

[0083] In addition, Rel. 16 specifies an RRC parameter for distinguishing between transmissions using a single TRP and transmissions using an SFN. When a UE reports corresponding UE capability information, the UE may distinguish between reception of a DL channel / signal using a single TRP and reception of a PDSCH assuming an SFN based on the RRC parameter. On the other hand, the UE may also perform transmission and reception using an SFN assuming a single TRP.

[0084] In Scheme 1 of Figure 2B, TRSs are 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.

[0085] In Scheme 1, there are two TCI states for the PDSCH since the UE receives DL channels / signals from each TRP using TRS from each TRP.

[0086] In Scheme 2 of FIG. 2C, TRS and DMRS are transmitted individually for each TRP. 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 for Doppler shift. Because the DMRS in Scheme 2 is increased more than that in Scheme 1, the maximum throughput of Scheme 2 is lower than that of Scheme 1.

[0087] In Scheme 0, the UE switches between single TRP and SFN based on higher layer signaling (RRC information element / MAC CE).

[0088] The UE may switch between Scheme 1 / Scheme 2 / NW pre-compensation scheme based on higher layer signaling (RRC information element / MAC CE).

[0089] In Scheme 1, two TRS resources are set for the HST's forward direction and its reverse direction, respectively.

[0090] In the example of Figure 3A, the TRPs (TRPs #0, #2, ...) transmitting DL signals in the direction opposite to the HST transmit a first TRS (a TRS arriving before the HST) in the same time and frequency resource (SFN). The TRPs (TRPs #1, #3, ...) transmitting DL signals in the direction of travel of the HST transmit a second TRS (a TRS arriving after the HST) in the same time and frequency resource (SFN). The first TRS and the second TRS may be transmitted / received using different frequency resources.

[0091] In the example of FIG. 3B, TRS1-1 to 1-4 are transmitted as the first TRS, and TRS2-1 to 2-4 are transmitted as the second TRS.

[0092] Considering beam operation, the first TRS is transmitted using 64 beams and 64 time resources, and the second TRS is transmitted using 64 beams and 64 time resources. The beams of the first TRS and the beams of the second TRS are considered to be equal (the QCL Type D RSs are equal). By multiplexing the first TRS and the second TRS into the same time resource but different frequency resource, resource utilization efficiency can be improved.

[0093] In the example of Fig. 4A, RRHs #0-#7 are arranged along the movement path of the HST. RRHs #0-#3 and RRHs #4-#7 are connected to baseband units (BBU) #0 and #1, respectively. Each RRH is a bidirectional RRH, and forms beams in both the direction of travel of the movement path and the opposite direction using each transmission / reception point (TRP).

[0094] In the received signal of the example of Figure 4B (Single TRP (SFN) / Scheme 1), when the UE receives a signal / channel (a beam in the direction of travel of the HST, a beam from behind the UE) transmitted from TRP #2n-1 (n is an integer greater than or equal to 0), a negative Doppler shift (-fD in this example) occurs. Also, when the UE receives a signal / channel (a beam in the direction opposite to the direction of travel of the HST, a beam from in front of the UE) transmitted from TRP #2n (n is an integer greater than or equal to 0), a positive Doppler shift (+fD in this example) occurs.

[0095] In Rel. 17 and later, a Doppler pre-compensation scheme (pre-Doppler compensation scheme, Doppler pre-compensation scheme, network (NW) pre-compensation scheme, HST NW pre-compensation scheme, TRP pre-compensation scheme, TRP-based pre-compensation scheme) is being considered for a base station to use when transmitting a downlink (DL) signal / channel from a TRP to a UE in an HST. By performing Doppler compensation in advance when transmitting a DL signal / channel to a UE, the TRP can reduce the effect of Doppler shift when the UE receives the DL signal / channel. In the present disclosure, the Doppler pre-compensation scheme may be a combination of Scheme 1 and Doppler shift pre-compensation by the base station.

[0096] In the Doppler pre-compensation scheme, it is being considered that the TRS from each TRP is transmitted without Doppler pre-compensation, and the PDSCH from each TRP is transmitted with Doppler pre-compensation.

[0097] In the Doppler pre-compensation scheme, the TRPs that form beams in the direction of travel and the TRPs that form beams in the opposite direction of travel perform Doppler compensation before transmitting DL signals / channels to UEs within the HST. In this example, TRP #2n-1 performs positive Doppler compensation, and TRP #2n performs negative Doppler compensation to reduce the effect of Doppler shift when the UE receives the signal / channel (Figure 4C).

[0098] Note that in the situation of Figure 4C, there may be two TCI states for the PDSCH, since the UE receives DL channels / signals from each TRP using TRS from each TRP.

[0099] Furthermore, in Rel. 17 and later, dynamic switching between single-TRP and SFN using the TCI field (TCI state field) is being considered. For example, one or two TCI states are configured / indicated at each TCI code point (TCI field code point, DCI code point) using an RRC information element / MAC CE (e.g., Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) / DCI (TCI field). A UE may determine to receive a single-TRP PDSCH when one TCI state is configured / indicated. Alternatively, a UE may determine to receive a multi-TRP SFN PDSCH when two TCI states are configured / indicated.

[0100] (Simultaneous Beam Update of Multiple CCs) In Rel. 16, one MAC CE can update the beam index (TCI state) of multiple CCs.

[0101] The UE can be configured with up to two applicable CC lists (e.g., applicable-CC-list) by RRC. When two applicable CC lists are configured, the two applicable CC lists may correspond to in-band CA in FR1 and in-band CA in FR2, respectively.

[0102] The PDCCH TCI state activation MAC CE activates the TCI states associated with the same CORESET ID on all BWP / CCs in the applicable CC list.

[0103] Activation of TCI State for PDSCH The MAC CE activates the TCI state on all BWP / CCs in the applicable CC list.

[0104] A-SRS / SP-SRS Spatial Relationship Activation The MAC CE activates the spatial relationships associated with the same SRS resource ID on all BWPs / CCs in the applicable CC list.

[0105] In the example of Figure 5, the UE is configured with an applicable CC list indicating CCs #0, #1, #2, and #3, and a list indicating 64 TCI states for CORESET or PDSCH of each CC. If one TCI state of CC #0 is activated by a MAC CE, the corresponding TCI state is activated in CCs #1, #2, and #3.

[0106] Such simultaneous beam updating is considered applicable only to the single TRP case.

[0107] For PDSCH, the UE may follow the procedure A. [Procedure A] The UE receives an activation command to map up to eight TCI states to codepoints of the DCI field (TCI field) within one CC / DL BWP or within one set of CCs / BWPs. If one set of TCI state IDs is activated for one set of CCs / DL BWPs, then the applicable list of CCs is determined by the CC indicated in the activation command, and the same set of TCI states applies to all DL BWPs within the indicated CCs. Only if the UE is not provided with different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states, can one set of TCI state IDs be activated for one set of CC / DL BWPs.

[0108] For PDCCH, the UE may follow procedure B. [Procedure B] If the UE is provided with up to two lists of cells for simultaneous TCI state activation by the simultaneous TCI cell list (simultaneousTCI-CellList) via the simultaneous TCI update list (at least one of simultaneousTCI-UpdateList-r16 and simultaneousTCI-UpdateListSecond-r16), the UE shall apply antenna port quasi co-location (QCL) provided by TCI states with the same activated TCI state ID value to CORESET with 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. A simultaneous TCI cell list can be provided for simultaneous TCI state activation only if the UE is not provided with multiple different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states.

[0109] For semi-persistent (SP) / aperiodic (AP)-SRS, the UE may follow procedure C. [Procedure C] When spatial relation information (spatialRelationInfo) for SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) for one set of CCs / BWPs is activated / updated by MAC CE, where the applicable list of CCs is indicated by the simultaneous spatial update list (higher layer parameter simultaneousSpatial-UpdateList-r16 or simultaneousSpatial-UpdateListSecond-r16), the spatial relation information is applied to SP or AP-SRS resources with the same SRS resource ID in all BWPs within the indicated CC. The spatial relation information (spatialRelationInfo) for the SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) for one set of CCs / BWPs is activated / updated by the MAC CE only if the UE is not provided with different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states.

[0110] The simultaneous TCI cell list (simultaneousTCI-CellList) and the simultaneous TCI update list (at least one of simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16) are lists of serving cells whose TCI relationships can be updated simultaneously using MAC CE. simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16 do not include the same serving cell.

[0111] 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 MAC CE. simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16 do not include the same serving cell.

[0112] Here, the simultaneous TCI update list and the simultaneous spatial update list are configured by the RRC, the CORESET pool index of the CORESET is configured by the RRC, and the TCI code point mapped to the TCI state is indicated by the MAC CE.

[0113] (Unified / Common TCI Framework) The unified TCI framework allows UL and DL channels to be controlled by a common framework. Instead of specifying TCI states or spatial relationships for each channel as in Rel. 15, the unified TCI framework may specify a common beam (common TCI state) and apply it to all UL and DL channels, or a common beam for UL may apply to all UL channels and a common beam for DL ​​may apply to all DL channels.

[0114] One common beam for both DL and UL, or one common beam for DL ​​and one common beam for UL (two common beams overall) are considered.

[0115] The UE may assume the same TCI state for UL and DL (joint TCI state, joint TCI pool, joint common TCI pool, joint TCI state set). The UE may assume different TCI states for UL and DL (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).

[0116] The default beams for UL and DL may be aligned via MAC CE based beam management (MAC CE level beam indication). The default TCI state of the PDSCH may be updated to align with the default UL beam (spatial relationship).

[0117] DCI-based beam management (DCI-level beam indication) may indicate a common beam / unified TCI state from the same TCI pool for both UL and DL (joint common TCI pool, joint TCI pool, set). X (>1) TCI states may be activated by the MAC CE. The UL / DL DCI may select one from the X active TCI states. The selected TCI state may apply to both UL and DL channels / RS.

[0118] The TCI pool (set) may be multiple TCI states configured by RRC parameters, or multiple TCI states (active TCI states, active TCI pools, sets) activated by MAC CE among the multiple TCI states configured by RRC parameters. Each TCI state may be a QCL type A / D RS. SSB, CSI-RS, or SRS may be configured as the QCL type A / D RS.

[0119] The number of TCI states corresponding to each of one or more TRPs may be specified. For example, the number N (≧1) of TCI states applied to UL channels / RSs (UL TCI states) and the number M (≧1) of TCI states applied to DL channels / RSs (DL TCI states) may be specified. At least one of N and M may be notified / configured / instructed to the UE via higher layer signaling / physical layer signaling.

[0120] In the present disclosure, when N=M=X (X is any integer), it may mean that X TCI states (joint TCI states) common to UL and DL (corresponding to X TRPs) are notified / configured / instructed to the UE.

[0121] Furthermore, when N=X (X is any integer) and M=Y (Y is any integer, Y may be X), it may mean that X UL TCI states (corresponding to X TRPs) and Y DL TCI states (corresponding to Y TRPs) are notified / configured / indicated to the UE. The UL TCI state and the DL TCI state may mean a TCI state common to the UL and DL (i.e., a joint TCI state), or may mean a TCI state for each of the UL and DL (i.e., a separate TCI state).

[0122] For example, when N=M=1 is written, this may mean that a TCI state common to one UL and DL for a single TRP is notified / configured / indicated to the UE (joint TCI state for a single TRP).

[0123] Also, for example, when N=1 and M=1 are written, this may mean that one UL TCI state and one DL TCI state for a single TRP are separately notified / configured / instructed to the UE (separate TCI states for a single TRP).

[0124] Also, for example, when N=M=2 is written, this may mean that a TCI state common to multiple (two) ULs and DLs for multiple (two) TRPs is notified / configured / instructed to the UE (joint TCI state for multiple TRPs).

[0125] Also, for example, when N=2 and M=2, it may mean that multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs are notified / configured / instructed to the UE (separate TCI states for multiple TRPs).

[0126] Furthermore, for example, when N=2 and M=1, this may mean that two TCI states common to the UL and DL are notified / configured / instructed to the UE. In this case, the UE may use the two configured / instructed TCI states as UL TCI states and use one TCI state of the two configured / instructed TCI states as a DL TCI state.

[0127] Also, for example, when N=2 and M=1, this may mean that two UL TCI states and one DL TCI state are notified / configured / instructed to the UE as separate TCI states.

[0128] In the above example, the values ​​of N and M are 1 or 2, but the values ​​of N and M may be 3 or more, and N and M may be different.

[0129] The case where M>1 / N>1 may indicate at least one of TCI status indications for multiple TRPs and multiple TCI status indications for inter-band CA.

[0130] In the example of Figure 6A, the RRC parameters (information elements) configure multiple TCI states for both DL and UL. The MAC CE may activate multiple TCI states from the configured multiple TCI states. The DCI may indicate one of the activated multiple TCI states. The DCI may be a UL / DL DCI. The indicated TCI state may apply to at least one (or all) of the UL / DL channels / RS. One DCI may indicate both the UL TCI and the DL TCI.

[0131] In the example of FIG. 6A, a point may be one TCI state that applies to both UL and DL, or two TCI states that apply to UL and DL, respectively.

[0132] At least one of the multiple TCI states configured 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). The multiple TCI states activated by the MAC CE may be referred to as an active TCI pool (active common TCI pool).

[0133] In the present disclosure, higher layer parameters (RRC parameters) for setting multiple TCI states may be referred to as configuration information for setting multiple TCI states, or simply as "configuration information." Also, in the present disclosure, being instructed to set one of multiple TCI states using DCI may mean receiving indication information instructing one of the multiple TCI states included in DCI, or may simply mean receiving "instruction information."

[0134] In the example of Figure 6B, the RRC parameters configure multiple TCI states (joint common TCI pools) for both DL and UL. The MAC CE may activate multiple TCI states (active TCI pools) from the configured multiple TCI states. Separate active TCI pools for each of the UL and DL may be configured / activated.

[0135] The DL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) DL channels / RSs. The DL channels may be PDCCH / PDSCH / CSI-RS. The UE may determine the TCI state of each DL channel / RS using the TCI state behavior (TCI framework) of Rel. 16. The UL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) UL channels / RSs. The UL channels may be PUSCH / SRS / PUCCH. In this way, different DCIs may indicate UL TCI and DL DCI separately.

[0136] The existing DCI formats 1_1 / 1_2 may be used to indicate the common TCI state.

[0137] The DCI format indicating the TCI status may be a specific DCI format, for example, DCI format 1_1 / 1_2 (defined in Rel. 15 / 16 / 17).

[0138] The DCI format (DCI format 1_1 / 1_2) indicating the TCI state may be a DCI format without a DL assignment. In the present disclosure, the DCI format may be interchangeably referred to as a DCI format without a DL assignment, a DCI format (DCI format 1_1 / 1_2) that does not schedule a PDSCH, a DCI format (DCI format 1_1 / 1_2) that does not include one or more specific fields, or a DCI format (DCI format 1_1 / 1_2) in which one or more specific fields are set to fixed values.

[0139] For a DCI format without DL assignment (a DCI format that does not include one or more specific fields), the specific fields may be fields other than the TCI field, the DCI format identifier field, the carrier indicator field, the bandwidth portion (BWP) indicator field, the Time Domain Resource Assignment (TDRA) field, the Downlink Assignment Index (DAI) field (if configured), the Transmission Power Control (TPC) command field (for the scheduled PUCCH), the PUCCH resource indicator field, and the PDSCH-to-HARQ feedback timing indicator field (if present). The specific fields may be set as reserved fields or ignored.

[0140] For DCI formats without DL assignment (DCI formats in which one or more specific fields are set to fixed values), the specific fields may be a Redundancy Version (RV) field, a Modulation and Coding Scheme (MCS) field, a New Data Indicator field, and a Frequency Domain Resource Assignment (FDRA) field.

[0141] The RV field may be set to all ones. The MCS field may be set to all ones. The NDI field may be set to zero. The FDRA field of type 0 may be set to all zeros. The FDRA field of type 1 may be set to all ones. The FDRA field for dynamic switch (higher layer parameter dynamicSwitch) may be set to all zeros.

[0142] A common TCI framework may have separate TCI states for DL ​​and UL.

[0143] (MAC CE) In Rel. 16, MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) is used for UE-specific TCI state activation / deactivation of PDSCH (see FIG. 7).

[0144] The MAC CE is identified by a MAC subheader with a Logical Channel ID (LCID).

[0145] The MAC CE may be used in an environment using a single TRP or multiple TRPs based on multiple DCIs.

[0146] The MAC CE may include a Serving Cell ID field, a BWP ID field, a field (Ti) for indicating activation / deactivation of the TCI state, and a CORESET Pool ID field.

[0147] The Serving Cell ID field may be a field for indicating a serving cell to which the MAC CE applies. The BWP ID field may be a field for indicating a DL BWP to which the MAC CE applies. The CORESET Pool ID field may be a field for indicating that the correspondence (mapping) between the activated TCI state and the code point of the TCI field indicated by the DCI set in field Ti (DCI TCI code point) is specific to the ControlResourceSetId set in the CORESET Pool ID.

[0148] In addition, in Rel. 16, MAC CE (Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) is used for UE-specific TCI state activation / deactivation of PDSCH (see FIG. 8).

[0149] The MAC CE is identified in the MAC PDU subheader with the eLCID.

[0150] This MAC CE may be used in an environment using multiple TRPs based on a single DCI.

[0151] The MAC CE may include a Serving Cell ID field, a BWP ID field, a field for indicating the TCI state identified by TCI-StateID (TCI state IDi,j (i is an integer from 0 to N, j is 1 or 2)), a field (Ci) indicating whether TCI state IDi,2 is present in the corresponding octet, and a Reserved Bit field (R, set to 0).

[0152] "i" may correspond to the index of the codepoint of the TCI field indicated by the DCI. "TCI state IDi,j" may indicate the j-th TCI state of the codepoint of the i-th TCI field.

[0153] In addition, in Rel. 16, MAC CE (TCI State Indication for UE-specific PDCCH MAC CE) is used for activation / deactivation of the TCI state of UE-specific PDCCH / CORESET (see FIG. 9 ).

[0154] The MAC CE is identified by a MAC subheader with an LCID.

[0155] The MAC CE may include a serving cell ID field, a field indicating the CORESET (CORESET ID) for which the TCI state is specified, and a field (TCI state ID) for indicating the TCI state applicable to the CORESET identified by the CORESET ID.

[0156] (Analysis) The TCI state introduced in Rel. 17 (Rel. 17 TCI state, common TCI state) is considered to indicate one TCI state (M=1, N=1, or M=N=1). In other words, the Rel. 17 TCI state is considered to be applicable to situations using a single TRP.

[0157] It is being considered that the TCI states / spatial relationships defined up to Rel. 15 / 16 (excluding TCI states related to positioning reference signals) and the Rel. 17 TCI states will not be set in the same band.

[0158] In this case, features (e.g., operations using multiple TRPs) that use the Rel. 15 / 16 TCI state / spatial relationship defined in Rel. 15 through Rel. 17 cannot be configured in the same band as the Rel. 17 TCI state.

[0159] Therefore, there is a need to extend the common TCI states (Rel. 17 TCI states) to support features using Rel. 15 / 16 TCI state / spatial relationships, including multi-TRP schemes (e.g., using MAC CE / DCI to indicate more than one TCI state).

[0160] For example, in Rel. 18 and later, it is being considered to make the common TCI state applicable to at least one of the multi-TRP schemes specified in Rel. 16 / 17, such as: ・Single DCI-based NCJT PDSCH (Rel. 16) ・Multiple DCI-based NCJT PDSCH (Rel. 16) ・Single DCI-based SDM / TDM / FDM PDSCH repeat transmission (Rel. 16) ・Multiple TRP-based PDCCH / PUCCH / PUSCH repeat transmission (Rel. 17) ・Inter-cell operation for multi-TRP (Rel. 17) ・Beam management for multi-TRP (Rel. 17) ・HST / SFN (Rel. 17)

[0161] Furthermore, the extension of the common TCI state may be used for beam indication in inter-band carrier aggregation, in which one or more TCI states of different bands may be indicated using one MAC CE / DCI.

[0162] However, in the case of transmitting and receiving signals / channels using multiple TRPs, there is insufficient consideration given to the setting / indication / application of a common TCI state. More specifically, there is insufficient consideration given to switching between transmitting and receiving single-TRP channels / signals and transmitting and receiving multi-TRP channels / signals when using a common TCI state. Furthermore, there is insufficient consideration given to the method of mapping one or more TCI states to each channel / signal. If these considerations are insufficient, there is a risk of degradation in communication quality, degradation in throughput, etc.

[0163] Therefore, the inventors have come up with a method for appropriately setting / indicating / applying TCI states when transmitting and receiving signals / channels using multi-TRP, even when the TCI state is applied to multiple types of signals / channels.

[0164] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0165] In the present disclosure, "A / B / C" and "at least one of A, B, and C" may be read as interchangeable. In the present disclosure, cell, serving cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, and band may be read as interchangeable. In the present disclosure, index, ID, indicator, and resource ID may be read as interchangeable. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. may be read as interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be read as interchangeable.

[0166] In the present disclosure, the terms configure, activate, update, indicate, enable, specify, and select may be read interchangeably.

[0167] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, RRC, RRC signaling, RRC parameters, higher layer, higher layer parameters, RRC information elements (IEs), RRC messages, and settings may be read interchangeably.

[0168] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. In the present disclosure, the MAC CE, an update command, and an activation / deactivation command may be read interchangeably.

[0169] The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI, SIB1), Other System Information (OSI), etc.

[0170] In the present disclosure, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, TCI assumption, QCL assumption, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, RS of QCL type D for TCI state / QCL assumption, RS of QCL type A for TCI state / QCL assumption, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, and PL-RS may be read interchangeably. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, and SRS may be read interchangeably.

[0171] In the present disclosure, the terms panel, UE panel, panel group, antenna group, UE capability value, UE capability value set, specific (pool) index included in PUSCH configuration, specific (pool) index included in PUCCH configuration, specific (pool) index included in SRS configuration, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CONTROLLER RESEARCH SET ... Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc.The UE capability value set may include, for example, the maximum number of supported SRS ports.

[0172] The panel may be associated with at least one of a group index of an SSB / CSI-RS group, a group index of a group-based beam report, and a group index of an SSB / CSI-RS group for group-based beam reporting.

[0173] Furthermore, the panel identifier (ID) and the panel may be interchangeable. That is, the TRP ID and the TRP, the CORESET group ID and the CORESET group, etc. may be interchangeable.

[0174] In the present disclosure, the terms TRP, transmission point, panel, DMRS port group, CORESET pool, and one of two TCI states associated with one code point in the TCI field may be read interchangeably.

[0175] In this disclosure, the terms "single TRP," "single TRP system," "single TRP transmission," and "single PDSCH" may be interchangeable. In this disclosure, the terms "multiple TRP," "multiple TRP system," "multiple TRP transmission," and "multiple PDSCH" may be interchangeable. In this disclosure, the terms "single DCI," "single PDCCH," "multiple TRP based on a single DCI," and "activating two TCI states on at least one TCI codepoint" may be interchangeable.

[0176] In the present disclosure, single TRP, channel using single TRP, channel using one TCI state / spatial relationship, multi-TRP not enabled by RRC / DCI, multiple TCI states / spatial relationships not enabled by RRC / DCI, a CORESETPoolIndex value of 1 not set for any CORESET, and no code point in the TCI field mapped to two TCI states may be read interchangeably.

[0177] In the present disclosure, "multi-TRP," "channel using multi-TRP," "channel using multiple TCI states / spatial relationships," "multi-TRP being enabled by RRC / DCI," "multiple TCI states / spatial relationships being enabled by RRC / DCI," and "at least one of multi-TRP based on a single DCI" and "multi-TRP based on multiple DCI" may be interchangeable. In the present disclosure, "multi-TRP based on multiple DCI," and "setting a CORESET pool index (CORESETPoolIndex) value of 1 for the CORESET" may be interchangeable. In the present disclosure, "multi-TRP based on a single DCI," and "at least one code point in the TCI field is mapped to two TCI states" may be interchangeable.

[0178] In the present disclosure, TRP #1 (first TRP) may correspond to CORESET pool index = 0 or may correspond to the first of two TCI states corresponding to one code point in the TCI field. TRP #2 (second TRP) TRP #1 (first TRP) may correspond to CORESET pool index = 1 or may correspond to the second of two TCI states corresponding to one code point in the TCI field.

[0179] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, and activation of two TCI states on at least one TCI codepoint may be read interchangeably.

[0180] In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, mDCI-based MTRP, and setting two CORESET pool indices or CORESET pool index = 1 (or a value greater than or equal to 1) may be read interchangeably.

[0181] The QCL in the present disclosure may be interchangeably read as QCL Type D.

[0182] In the present disclosure, expressions such as "TCI state A is of QCL type D, the same as TCI state B," "TCI state A is the same as TCI state B," and "TCI state A is of QCL type D with TCI state B" may be interpreted interchangeably.

[0183] In the present disclosure, the code point of the DCI field 'Transmission Configuration Indication', the TCI code point, the DCI code point, and the code point of the TCI field may be read interchangeably.

[0184] In the present disclosure, the terms "single TRP" and "SFN" may be interchangeable. In the present disclosure, the terms "HST," "HST scheme," "high speed mobility scheme," "scheme 1," "scheme 2," "NW pre-compensation scheme," "HST scheme 1," "HST scheme 2," and "HST NW pre-compensation scheme" may be interchangeable.

[0185] In the present disclosure, a PDSCH / PDCCH using a single TRP may be interpreted as a PDSCH / PDCCH based on a single TRP, or a single TRP PDSCH / PDCCH. Also, in the present disclosure, a PDSCH / PDCCH using an SFN may be interpreted as a PDSCH / PDCCH using an SFN in multi-mode, a PDSCH / PDCCH based on an SFN, or an SFN PDSCH / PDCCH.

[0186] In the present disclosure, receiving DL signals (PDSCH / PDCCH) using an SFN may mean receiving the same data (PDSCH) / control information (PDCCH) from multiple transmission / reception points using the same time / frequency resources. Also, receiving DL signals using an SFN may mean receiving the same data / control information using the same time / frequency resources and / or using multiple TCI states / spatial domain filters / beams / QCLs.

[0187] In the present disclosure, at least one of the following terms may be interchangeable: HST-SFN scheme, SFN scheme for Rel. 17 or later, new SFN scheme, new HST-SFN scheme, HST-SFN scenario for Rel. 17 or later, HST-SFN scheme for HST-SFN scenario, SFN scheme for HST-SFN scenario, scheme 1, HST-SFN scheme A / B, HST-SFN type A / B, Doppler pre-compensation scheme, scheme 1 (HST scheme 1), and Doppler pre-compensation scheme.

[0188] In the present disclosure, the terms 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 interchangeable. In the present disclosure, the terms pre-compensation scheme, reduction scheme, improvement scheme, and correction scheme may be interchangeable.

[0189] In the present disclosure, a PDCCH / search space (SS) / CORESET with linkage, a linked PDCCH / SS / CORESET, and a PDCCH / SS / CORESET pair may be interchangeable. In the present disclosure, a PDCCH / SS / CORESET without linkage, an unlinked PDCCH / SS / CORESET, and a standalone PDCCH / SS / CORESET may be interchangeable.

[0190] In the present disclosure, two linked CORESETs for PDCCH repetition, two CORESETs respectively associated with two linked SS sets, may be read as interchangeable.

[0191] In the present disclosure, SFN-PDCCH repetition, PDCCH repetition, two linked PDCCHs, and one DCI being received across the two linked search spaces (SS) / CORESETs may be read interchangeably.

[0192] In the present disclosure, PDCCH repetition, SFN-PDCCH repetition, PDCCH repetition for higher reliability, PDCCH for higher reliability, PDCCH for reliability, and two linked PDCCHs may be read as interchangeable.

[0193] In the present disclosure, the terms PDCCH reception method, PDCCH repetition, SFN-PDCCH repetition, HST-SFN, and HST-SFN scheme may be read interchangeably.

[0194] In the present disclosure, the PDSCH reception method, single DCI-based multi-TRP, and HST-SFN scheme may be interchangeable.

[0195] In the present disclosure, the single DCI-based multi-TRP repetition may be an NCJT of an enhanced mobile broadband (eMBB) service (low priority, priority 0) or a repetition of a URLLC service (high priority, priority 1) of an ultra-reliable and low latency communications service.

[0196] In each embodiment of the present disclosure, a PDSCH for multiple TRPs based on a single DCI may be interchangeably read as a PDSCH to which TDM / FDM / SDM for multiple TRPs (as defined in Rel. 16) is applied.

[0197] In each embodiment of the present disclosure, the PDSCH for multiple TRPs may be interchangeably read as the PDSCH to which TDM / FDM / SDM for multiple TRPs based on a single DCI (specified in Rel. 16) is applied.

[0198] In each embodiment of the present disclosure, PUSCH / PUCCH / PDCCH for multiple TRPs based on a single DCI may be interchangeably read as repeated transmission (repetition) of PUSCH / PUCCH / PDCCH for multiple TRPs (defined in Rel. 17 and later).

[0199] In each embodiment of the present disclosure, the SFN PDSCH / PDCCH may be interchangeably read as the SFN PDSCH / PDCCH defined in Rel. 17 and later.

[0200] In each embodiment of the present disclosure, configuring the use of multiple TRPs based on multiple DCIs may mean setting a CORESET pool index of 1. Also, configuring the use of multiple TRPs based on multiple DCIs may mean setting two different CORESET pool index values ​​(e.g., 0 and 1).

[0201] In each embodiment of the present disclosure, UL transmission using multiple panels may refer to a UL transmission scheme using multiple panels of a UE with DCI enhancement.

[0202] In each embodiment of the present disclosure, if a joint TCI state / separate TCI state in the unified TCI state framework is not applicable to each channel / signal, the aforementioned default TCI state / QCL / spatial relationship may be used to determine the TCI state / QCL / spatial relationship of each channel.

[0203] The following embodiments of the present disclosure may be applied to transmission and reception of any channel / signal that is subject to the unified TCI state framework defined in the above-mentioned Rel. 17 and later.

[0204] In the present disclosure, applying a TCI state to each channel / signal / resource may mean applying the TCI state to transmission and reception of each channel / signal / resource.

[0205] In the present disclosure, small, few, short, and low may be read as interchangeable. Also, in the present disclosure, ignore, drop, cancel, discontinue, and postpone may be read as interchangeable.

[0206] In the present disclosure, repetition, repeated transmission, and repeated reception may be read interchangeably.

[0207] In the present disclosure, the terms channel, signal, and channel / signal may be interchangeable. 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 interchangeable. In the present disclosure, the terms UL channel, UL signal, UL signal / channel, transmission / reception of UL signal / channel, UL reception, and UL transmission may be interchangeable.

[0208] In the present disclosure, a first TRP may correspond to a first TCI state. In the present disclosure, a second TRP may correspond to a second TCI state. In the present disclosure, an n-th TRP may correspond to an n-th TCI state.

[0209] 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 state) 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 state) may correspond to each other.

[0210] In the following embodiments of the present disclosure, the application of multiple TCI states in transmission and reception using multiple TRPs will be mainly described with respect to a method for two TRPs (i.e., when at least one of N and M is 2), but the number of TRPs may be three or more (multiple), and 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 2.

[0211] (Wireless Communication Method) <Tenth Embodiment> Single DCI-based multi-TRP may be assumed to be supported when multi-TRP utilizes an ideal backhaul (see FIG. 10A).

[0212] In this case, one beam instruction DCI may indicate multiple TCI states for each TRP, which may be, for example, up to two joint TCI states or up to four separate DL / UL TCI states (two DL TCI states and two UL TCI states).

[0213] In the present disclosure, one TCI state may mean one joint (DL / UL) TCI state, or may mean at least one of one DL (separate) TCI state and one UL (separate) TCI state.

[0214] Multi-PDCCH (DCI) may be assumed to be supported when multi-TRPs utilize ideal / non-ideal backhaul (see FIG. 10B).

[0215] In this case, one DCI associated with one TRP (CORESET pool index) may indicate the TCI state corresponding to the TRP.

[0216] The ideal backhaul may be called DMRS port group type 1, reference signal related group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may be called 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.

[0217] The field indicating the TCI status (TCI field) included in the DCI may follow at least one of the following options 0-1 and 0-2.

[0218] [Option 0-1] The TCI field defined up to Rel. 15 / 16 may be reused (see Figure 11A). As shown in Figure 11A, one TCI field may be included in the DCI. The number of bits in the TCI field may be a specific number (e.g., 3).

[0219] [Option 0-2] The TCI field defined in Rel. 15 / 16 may be extended (see FIG. 11B). For example, the DCI may include multiple TCI fields (e.g., two). The number of bits in each TCI field may be a specific number (e.g., three).

[0220] In options 0-2, no DCI overhead is added for DCIs without DL assignments, while DCI overhead is added for DCIs with DL assignments.

[0221] For single DCI-based multi-TRP, in the case of joint TCI states, the DL / UL (joint) TCI state may be activated for the UE using a MAC CE, and the UE may then be indicated the first DL / UL (joint) TCI state and the second DL / UL (joint) TCI state using a DCI (beam indication) (see Figure 12A).

[0222] The TCI code point indicated by the beam indication may correspond to one or more (two) TCI states (first joint TCI state / second joint TCI state) (see FIG. 12B).

[0223] In the example shown in Figure 12B, all TCI code points corresponding to the active TCI state correspond to two TCI states, but an association may be used in which at least one TCI code point corresponding to the 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.

[0224] For single DCI-based multi-TRP, in the case of separate TCI states, the DL (separate) TCI state and the UL (separate) TCI state may be activated for the UE using a MAC CE. The UE may then be indicated the first DL (separate) TCI state and the first UL (separate) TCI state and the second DL (separate) TCI state and the second UL (separate) TCI state using a DCI (beam indication) (see Figure 13A).

[0225] The TCI code point indicated by the beam indication may correspond to one or more (two) TCI states (first separate (DL / UL) TCI state / second separate (DL / UL) TCI state) (see Figure 13B).

[0226] In the example shown in Figure 13B, 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), but an association may be used in which at least one TCI code point corresponding to the 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.

[0227] Note that, in FIG. 13A , an example is shown in which separate TCI states are activated for the DL TCI state and the UL TCI state with respect to the TCI state activated by the MAC CE. However, even in the case of separate TCI states, the activated DL TCI state and the UL TCI state may include a common TCI state.

[0228] For multi-DCI based multi-TRP, the TCI state may be configured by RRC, activated by MAC CE, and / or indicated by DCI per CORESET pool index.

[0229] For multi-DCI based multi-TRP, in case of joint TCI state, the TCI state may be configured by RRC, activated by MAC CE, and indicated by DCI to the UE for a CORESET pool index of a first value (e.g., 0) (see Figure 14A). The indicated TCI state corresponding to the CORESET pool index of the first value may be referred to as the first TCI state.

[0230] The TCI code point indicated by the beam indication may correspond to one TCI state (first joint TCI state) (see FIG. 14B).

[0231] For multi-DCI based multi-TRP, in case of joint TCI state, the TCI state may be configured by RRC, activated by MAC CE, and indicated by DCI to the UE for a CORESET pool index of a second value (e.g., 1) (see Figure 15A). The indicated TCI state corresponding to the CORESET pool index of the second value may be referred to as the second TCI state.

[0232] The TCI code point indicated by the beam indication may correspond to one TCI state (second joint TCI state) (see FIG. 15B).

[0233] When the DCIs corresponding to each CORESET pool index indicate the same TCI state (TCI state ID) (for example, when TCI state #7 corresponding to TCI codepoint "111" in Figures 14B and 15B is indicated), the UE may determine that one TCI state is indicated. In this case, the UE may operate using a single TRP.

[0234] Although the above multi-DCI based multi-TRP has been described as an example using a joint TCI state, it can also be applied appropriately to cases using a separate TCI state.

[0235] In this disclosure, the terms indicated TCI state, Rel. 17 TCI state, common TCI state, and unified TCI state may be interchangeable. In this disclosure, the terms common TCI state, Rel. 17 TCI state, and Rel. 18 TCI state that apply to channels / signals that utilize multiple TRPs may be interchangeable.

[0236] The UE may apply the indicated TCI state to a particular channel / signal.

[0237] The specific channel / signal may be a UE-specific (dedicated) DL channel / signal, which may be a UE-specific PDCCH / PDSCH / CSI-RS (e.g., aperiodic (A-) CSI-RS).

[0238] The specific channel / signal may be a specific UL channel / signal, which may be at least one of a DCI-indicated (dynamic grant-indicated) PUSCH, a configured grant PUSCH, multiple (all) specific PUCCHs (resources), and an SRS (e.g., an aperiodic (A-) SRS).

[0239] One or more (eg, two) indicated TCI states may be indicated based on the method described in the 0th embodiment above.

[0240] Each of the following embodiments of the present disclosure may be applied to a PDSCH with a single TRP.

[0241] The PDSCH of a single TRP 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 specific DCI format may indicate one TCI state.

[0242] The QCL assumption for the PDSCH of a single TRP may be the default TCI state, which may be one TCI state (in any DCI format).

[0243] The UE may not be configured for multi-TRP repeated transmission, and the single-TRP PDSCH may be scheduled as a PDSCH with single layer MIMO.

[0244] The single-TRP PDSCH may be the PDSCH when the UE is not configured with multi-TRP (e.g., CORESET pool index).

[0245] The PDSCH of a single TRP may be a PDSCH scheduled with a CORESET of at least the CSS. The PDSCH of a single TRP may be a PDSCH scheduled with a CORESET of only the CSS (or a CSS excluding the Type 3 CSS).

[0246] Each of the following embodiments of the present disclosure may be applied to a multi-TRP PDSCH.

[0247] The PDSCH of a single TRP may be scheduled with a specific DCI (DCI format), which may be DCI format 1_1 / 1-2, and which may indicate two TCI states.

[0248] The QCL assumption for the multi-TRP PDSCH may be the default TCI state, which may be two TCI states (in any DCI format).

[0249] The UE may not be configured for multi-TRP repeated transmission, and the multi-TRP PDSCH may be scheduled as a PDSCH with multi-layer MIMO.

[0250] The multi-TRP PDSCH may be a PDSCH when the UE is configured for multi-TRP repetition transmission, and may then be scheduled as a PDSCH with repetition (using TDM / FDM / SDM).

[0251] The multi-TRP PDSCH may be a PDSCH when the UE is configured with SFN scheme A / B. The multi-TRP PDSCH may be a PDSCH with multiple TCI states.

[0252] Each of the following embodiments of the present disclosure may be applied to a single TRP PDCCH.

[0253] The PDCCH of the single TRP may be a PDCCH associated with a CORESET in which the SFN scheme A / B is not configured.

[0254] The PDCCH of a single TRP may be a PDCCH associated with a CORESET in which repeated transmission (of two linked SSs) is not configured.

[0255] Each of the following embodiments of the present disclosure may be applied to a multi-TRP PDCCH.

[0256] The multi-TRP PDCCH may be a PDCCH associated with a CORESET in which SFN scheme A / B is configured.

[0257] Each of the following embodiments of the present disclosure may be applied to a single TRP PUSCH / PUCCH.

[0258] The PUSCH / PUCCH of a single TRP may be a PUSCH / PUCCH in which repeated transmission of a multi-TRP is not set.

[0259] Each of the following embodiments of the present disclosure may be applied to multi-TRP PUSCH / PUCCH.

[0260] The PUSCH / PUCCH of the multi-TRP may be a PUSCH / PUCCH for which repeated transmission of the multi-TRP is set.

[0261] Each of the following embodiments of the present disclosure may be applied to single / multi-TRP CSI-RS / SRS.

[0262] First Embodiment In the first embodiment, application of TCI states and the number of TCI states to be set / activated when at least one of M and N is 2 or more will be described.

[0263] In the following embodiments of the present disclosure, an example is shown in which the channel to which the TCI state is applied is the PDSCH, but this is not limited to this. In other words, the PDSCH in this embodiment may be interchanged with any channel / signal such as PDCCH / PUSCH / PUCCH / SRS / CSI-RS.

[0264] The UE may apply up to M and / or N (e.g., M and N are numbers greater than or equal to 2) TCI states (joint TCI states, separate (DL / UL) TCI states) to DL / UL channels / signals.

[0265] The UE may be configured / instructed to have at least one of a maximum of M and N TCI states (e.g., M and N are numbers greater than or equal to 2) set to the TCI state (joint TCI state, separate (DL / UL) TCI state).

[0266] For a PDSCH with a single TRP, the UE may select / determine / apply one TCI state from the configured / indicated TCI states.

[0267] For a multi-TRP PDSCH, the UE may select / determine / apply both / all of the configured / indicated TCI states.

[0268] In addition, one or more (two) TCI states configured / instructed to the UE may be TCI states that the UE uses as default TCI states.

[0269] 16 is a diagram showing an example of setting / indicating a TCI state according to the first embodiment. In the example shown in FIG. 16, two TCI states (here, TCI state #1 and TCI state #2 as joint / (separate) DL TCI states) are indicated to a UE. Here, the first TCI state is TCI state #1, and the second TCI state is TCI state #2.

[0270] In the example shown in FIG. 16, the UE determines to apply the first TCI state (TCI state #1) of the indicated TCI states for the PDSCH (PDSCH #1) of the single TRP.

[0271] In the example shown in Figure 16, the UE determines that for the multi-TRP PDSCHs (PDSCH #1-1 and PDSCH #1-2), it will apply the first TCI state (TCI state #1) of the TCI states indicated for PDSCH #1-1 and the second TCI state (TCI state #2) of the TCI states indicated for PDSCH #1-2.

[0272] Although FIG. 16 above describes a case where a joint / (separate) DL TCI state is instructed to the UE, the TCI state instructed to the UE may be a (separate) UL TCI state.

[0273] According to the first embodiment described above, the set / indicated TCI state can be appropriately applied to the channel / signal depending on the number of TRPs.

[0274] Second Embodiment In a second embodiment, the derivation of an index for a TRP and the application of an indicated TCI state are described.

[0275] The index for the TRP may be, for example, a CORESET pool index, a panel index, a TCI status list / pool index, a TRP index, etc.

[0276] In the present disclosure, deriving / determining an index related to a TRP and selecting / determining a TCI state to apply to a channel / signal corresponding to an index related to a TRP may be interpreted as interchangeable.

[0277] <<Embodiment 2-1>> Embodiment 2-1 may be applied to, for example, a case where at least one of multi-TRP based on multi-DCI and single-TRP is used.

[0278] An index for the TRP corresponding to the channel / signal may be derived from a particular CORESET / PDCCH.

[0279] In addition, a TRP index may be set / indicated for each channel / signal. This setting / indication may be performed using higher layer signaling (RRC / MAC CE) / DCI. In the present disclosure, "per channel / signal," "per channel / signal setting," "per channel / signal resource," and "per channel / signal resource set" may be interchangeable.

[0280] The channel / signal may be, for example, at least one of (scheduled) PDSCH / PUSCH and (triggered) PUCCH / Aperiodic (A)-SRS / A-CSI-RS.

[0281] An index for the TRP may be used to make a selection as to the TCI state to be set / indicated.

[0282] Each of the indicated TCI states may correspond to an index for the TRP. For example, a first one of the indicated TCI states may correspond to an index for the first TRP. Also, for example, a second one of the indicated TCI states may correspond to an index for the second TRP.

[0283] The particular CORESET / PDCCH may be the CORESET / PDCCH that schedules / trigger the channel.

[0284] The UE / base station may derive the index for the TRP corresponding to the channel / signal from a particular CORESET / PDCCH.

[0285] When a channel / signal is scheduled / triggered by a CORESET / PDCCH associated with an index for a certain TRP, the UE may select / determine the TCI state to apply to that channel / signal from multiple indicated TCI states based on the index for that TRP.

[0286] The UE may also select / determine the TCI state to apply to the channel / signal from multiple indicated TCI states based on the index for the TRP set / indicated for the channel / signal.

[0287] An RRC parameter (e.g., followUnifiedTCIstate) indicating that the common TCI state (indicated TCI state) is followed may be associated with the CORESET / PDCCH configuration.

[0288] The configuration of the CORESET / PDCCH may not be associated with an RRC parameter (e.g., "followUnifiedTCIstate") indicating that a common TCI state is to be followed. In this case, the UE may select / determine the TCI state of a channel / signal scheduled / triggered by the CORESET / PDCCH from the indicated TCI states based on the TRP-related index. In this case, the UE may ignore the TCI state associated with the configuration of the CORESET / PDCCH.

[0289] An RRC parameter (e.g., followUnifiedTCIstate) indicating that a common TCI state is followed may not be associated with the CORESET / PDCCH configuration. In this case, the UE may apply the TCI state associated with the CORESET / PDCCH configuration to channels / signals scheduled / triggered by the CORESET / PDCCH.

[0290] In the present disclosure, the terms "no RRC parameter (e.g., followUnifiedTCIstate) indicating that the common TCI state is followed is associated with the CORESET / PDCCH setting" and "not sharing the indicated TCI state (common TCI state)" may be interpreted interchangeably.

[0291] 17 is a diagram showing an example of selection / application of a TCI state according to embodiment 2-1. In the example shown in FIG. 17, two TCI states (here, TCI state #1 and TCI state #2 as joint / (separate) DL TCI states) are indicated to a UE. Here, the first TCI state is TCI state #1, and the second TCI state is TCI state #2.

[0292] In the example shown in Figure 17, CORESETs #1-#3 are configured for the UE. The configuration of CORESET #1 is associated with TCI state #1, CORESET pool index = 0, and an RRC parameter (followUnifiedTCIstate) indicating that the common TCI state is followed. The configuration of CORESET #2 is associated with TCI state #2, CORESET pool index = 1, and an RRC parameter (followUnifiedTCIstate) indicating that the common TCI state is followed. The configuration of CORESET #3 is associated with TCI state #3 and CORESET pool index = 1, and is not associated with the RRC parameter (followUnifiedTCIstate) indicating that the common TCI state is followed.

[0293] In the example shown in Figure 17, the UE determines, based on the CORESET pool index associated with CORESET #1, that the TRP-related index (CORESET pool index / TRP index) for PDSCH #1 associated with CORESET #1 is 0. Based on the CORESET pool index associated with CORESET #1, the UE determines to apply the first TCI state (TCI state #1) of the indicated TCI states to PDSCH #1 associated with CORESET #1.

[0294] In the example shown in Figure 17, the UE determines, based on the CORESET pool index associated with CORESET #2, that the TRP-related index (CORESET pool index / TRP index) for PDSCH #2 associated with CORESET #2 is 1. Based on the CORESET pool index associated with CORESET #2, the UE determines to apply the second TCI state (TCI state #2) of the indicated TCI states to PDSCH #2 associated with CORESET #2.

[0295] In the example shown in Figure 17, the UE determines, based on the CORESET pool index associated with CORESET #3, that the TRP-related index (CORESET pool index / TRP index) for PDSCH #3 associated with CORESET #3 is 1. Based on the CORESET pool index associated with CORESET #3, the UE determines to apply the second TCI state (TCI state #2) of the indicated TCI states to PDSCH #3 associated with CORESET #3.

[0296] In addition, although the case where the joint / (separate) DL TCI state is instructed to the UE has been described in the above-mentioned Figure 17, the TCI state instructed to the UE may be the (separate) UL TCI state. Also, in Figure 17, an example where TCI state #2 is applied to PDSCH #3 has been shown, but as described above, TCI state #3 may be applied to PDSCH #3.

[0297] In the present disclosure, a CORESET / PDCCH configuration in which a TRP-related index is not set may mean that a TRP-related index of a first value (e.g., 0 or 1) is set. If a TRP-related index is not set for a CORESET / PDCCH configuration, the UE may assume that a TRP-related index of a first value (e.g., 0 or 1) is associated with the CORESET / PDCCH.

[0298] In the present disclosure, in a multi-DCI-based multi-TRP system, a TRP-related index (e.g., a CORESET pool index) may be configured for each CORESET. In the present disclosure, in a single-DCI-based single-TRP system, a TRP-related index (e.g., at least one of a TCI state list (pool / set) index, a first / second TCI state index, an index for distinguishing TRPs, and a TRP index) may be configured for each CORESET configuration / PDCCH configuration.

[0299] According to embodiment 2-1, the TCI state to be applied to each channel / signal can be appropriately determined using an index related to the TRP.

[0300] <<Embodiment 2-2>> Embodiment 2-2 may be applied to, for example, a case where at least one of single DCI-based multi-TRP and single-TRP is used.

[0301] An index for a TRP corresponding to a channel / signal may be derived from the index of the particular channel / signal.

[0302] The channel / signal may be, for example, at least one of (scheduled) PDSCH / PUSCH and (triggered) PUCCH / Aperiodic (A)-SRS / A-CSI-RS.

[0303] An index for the TRP may be used to make a selection as to the TCI state to be set / indicated.

[0304] Each of the indicated TCI states may correspond to an index for the TRP. For example, a first one of the indicated TCI states may correspond to an index for the first TRP. Also, for example, a second one of the indicated TCI states may correspond to an index for the second TRP.

[0305] The particular channel / signal may be, for example, a scheduled / triggered PDSCH / PUSCH / PUCCH / A-SRS / A-CSI-RS.

[0306] The UE / base station may derive an index for the TRP corresponding to the channel / signal from (the index associated with) the particular channel / signal.

[0307] For at least one of the multi-TRP PDSCH (NCJT or repeated transmission), the multi-TRP PDCCH / PUCCH / PUSCH repeated transmission, and the M-TRP SRS / CSI-RS, the UE may determine that a first TCI state among the indicated TCI states applies to a first (indexed) PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS, and at this time, the UE may determine that a second TCI state among the indicated TCI states applies to a second (indexed) PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS.

[0308] The mapping / association of the first / second TCI state to each channel / signal may be performed using existing methods (defined up to Rel. 16).

[0309] An RRC parameter (e.g., followUnifiedTCIstate) indicating that the common TCI state (indicated TCI state) is followed may be associated with the CORESET / PDCCH configuration.

[0310] The configuration of the CORESET / PDCCH may not be associated with an RRC parameter (e.g., "followUnifiedTCIstate") indicating that a common TCI state is to be followed. In this case, the UE may select / determine the TCI state of a channel / signal scheduled / triggered by the CORESET / PDCCH from the indicated TCI states based on the TRP-related index. In this case, the UE may ignore the TCI state associated with the configuration of the CORESET / PDCCH.

[0311] An RRC parameter (e.g., followUnifiedTCIstate) indicating that a common TCI state is followed may not be associated with the CORESET / PDCCH configuration. In this case, the UE may apply the TCI state associated with the CORESET / PDCCH configuration to channels / signals scheduled / triggered by the CORESET / PDCCH.

[0312] 18 is a diagram showing an example of selection / application of a TCI state according to embodiment 2-2. In the example shown in FIG. 18, two TCI states (here, TCI state #1 and TCI state #2 as joint / (separate) DL TCI states) are indicated to a UE. Here, the first TCI state is TCI state #1, and the second TCI state is TCI state #2.

[0313] In the example shown in Figure 18, CORESETs #1-#3 are configured for the UE. The configuration of CORESET #1 is associated with TCI state #1, TRP-related index = 0, and an RRC parameter (followUnifiedTCIstate) indicating that the common TCI state is followed. The configuration of CORESET #2 is associated with TCI state #2, TRP-related index = 1, and an RRC parameter (followUnifiedTCIstate) indicating that the common TCI state is followed. The configuration of CORESET #3 is associated with TCI state #3, TRP-related index = 1, and an RRC parameter (followUnifiedTCIstate) indicating that the common TCI state is followed.

[0314] In the example shown in Figure 18, CORESET #1 (and its associated PDCCH) schedules PDSCH #1-1 and PDSCH #1-2, CORESET #2 (and its associated PDCCH) schedules PDSCH #2-1 and PDSCH #2-2, and CORESET #3 (and its associated PDCCH) schedules PDSCH #3-1 and PDSCH #3-2.

[0315] In the example shown in FIG. 18, for a PDSCH scheduled by each CORESET, the UE selects one of the indicated TCI states based on the index of the PDSCH.

[0316] In the example shown in Figure 18, the UE determines to apply the first TCI state (TCI state #1) of the indicated TCI states for PDSCH #1-1, PDSCH #2-1, and PDSCH #3-1, and also determines to apply the second TCI state (TCI state #2) of the indicated TCI states for PDSCH #1-2, PDSCH #2-2, and PDSCH #3-2.

[0317] In addition, although the case where the joint / (separate) DL TCI state is instructed to the UE has been described in above Figure 18, the TCI state instructed to the UE may be the (separate) UL TCI state. Also, in Figure 18, an example where TCI state #2 is applied to PDSCH #3 has been shown, but as described above, TCI state #3 may be applied to PDSCH #3.

[0318] In the case where repeated transmission is performed, the mapping of TCI states for the n-th repetition may be sequential or cyclic. For example, in sequential mapping, a first TCI state may be mapped to the first and second repetitions (transmissions), and a second TCI state may be mapped to the third and fourth repetitions (transmissions). For example, in cyclic mapping, a first TCI state may be mapped to the first and third repetitions (transmissions), and a second TCI state may be mapped to the second and fourth repetitions (transmissions).

[0319] In addition, when PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS of a single TRP are scheduled / triggered, the UE may determine the TCI state to apply to each channel / signal according to specific rules.

[0320] For example, the UE may decide to (always) apply the first (or second) TCI state of the indicated TCI states to each channel.

[0321] For example, the UE may be configured to apply either the first TCI state or the second TCI state among the indicated TCI states, and this configuration may be performed using higher layer signaling (RRC / MAC CE).

[0322] 19 is a diagram showing another example of selection / application of a TCI state according to embodiment 2-2. In the example shown in FIG. 19, two TCI states (here, TCI state #1 and TCI state #2 as joint / (separate) DL TCI states) are indicated to a UE. Here, the first TCI state is TCI state #1, and the second TCI state is TCI state #2.

[0323] In the example shown in Fig. 19, the setting of CORESET is the same as that in Fig. 18. Only the differences from Fig. 18 will be explained below.

[0324] In the example shown in Figure 19, CORESET #2 (and its associated PDCCH) schedules PDSCH #2-1, which is a PDSCH with a single TRP.

[0325] At this time, the UE determines to apply the first TCI state (TCI state #1) of the indicated TCI states to PDSCH #2-1.

[0326] In addition, although the case where the joint / (separate) DL TCI state is instructed to the UE has been described in the above Figure 19, the TCI state instructed to the UE may be the (separate) UL TCI state. Also, in Figure 19, an example where TCI state #2 is applied to PDSCH #3 has been shown, but as described above, TCI state #3 may be applied to PDSCH #3.

[0327] According to embodiment 2-2, the TCI state to be applied to each channel / signal can be appropriately determined using the index of each channel / signal.

[0328] <<Modification of Embodiment 2-1 / 2-2>> For each channel / signal (e.g., at least one of scheduled PDSCH / PUSCH and triggered PUCCH / A-CSI-RS / A-SRS), a DCI field may be defined indicating at least one of single-TRP or multi-TRP and the order of the indicated TCI states.

[0329] In addition, for each channel / signal, at least one of a DCI field indicating whether it is single TRP or multi-TRP and a DCI field indicating the order of the indicated TCI states may be defined.

[0330] The DCI field may be included in a specific DCI, for example, the specific DCI may be a DCI that schedules a PDSCH / PUSCH (e.g., DCI format 0_0 / 0_1 / 0_2 / 1_0 / 1_1 / 1_2).

[0331] The DCI field may be a specific number of bits.

[0332] For example, the specific DCI field may be 2 bits (see Figure 20A). In the example shown in Figure 20A, the correspondence between the code point of the DCI field and the indication regarding the TCI state is shown.

[0333] In the example shown in Figure 20A, when the code point of the DCI field indicates "00", it indicates that the channel / signal associated with the DCI is a single-TRP transmission and the first TCI state applies, and when the code point of the DCI field indicates "01", it indicates that the channel / signal associated with the DCI is a single-TRP transmission and the second TCI state applies.

[0334] Furthermore, if the code point of the DCI field indicates "10", it indicates that the channel / signal associated with the DCI is a multi-TRP transmission and that the TCI states to be applied to each channel / signal index in ascending order are the first TCI state, then the second TCI state.Also, if the code point of the DCI field indicates "11", it indicates that the channel / signal associated with the DCI is a multi-TRP transmission and that the TCI states to be applied to each channel / signal index in ascending order are the second TCI state, then the first TCI state.

[0335] For example, the specific DCI field may be 1 bit (see Figures 20B and 20C). In the example shown in Figure 20B, the correspondence between the code point of the DCI field and the indication regarding the TCI state for a single TRP is shown. In the example shown in Figure 20C, the correspondence between the code point of the DCI field and the indication regarding the TCI state for a single TRP or a multi-TRP is shown.

[0336] In the example shown in Figure 20B, when the code point of the DCI field indicates "0", it indicates that the channel / signal associated with the DCI is a single-TRP transmission and the first TCI state applies, and when the code point of the DCI field indicates "1", it indicates that the channel / signal associated with the DCI is a single-TRP transmission and the second TCI state applies.

[0337] In the example shown in Figure 20C, when the code point of the DCI field indicates "0", it indicates that the channel / signal associated with the DCI is a single-TRP transmission and the first TCI state is applied. Also, when the code point of the DCI field indicates "1", it indicates that the channel / signal associated with the DCI is a multi-TRP transmission and the TCI states applied to each channel / signal in ascending order are the first TCI state, then the second TCI state.

[0338] 20A to 20C, the terms "first" and "second" may be interchangeable. Furthermore, the number of bits in the DCI field, the correspondence between the DCI code point and the TCI status indication are merely examples, and are not limiting.

[0339] The number of bits of the DCI field may be configured for the UE using higher layer signaling (RRC / MAC CE). This configuration may be performed commonly for the DCI for DL ​​and the DCI for UL, or may be performed separately for the DCI for DL ​​and the DCI for UL. Alternatively, the number of bits of the DCI field may be a fixed value predefined in the specifications.

[0340] The DCI field may be used for transmitting / receiving PUCCH (e.g., HARQ-ACK) / A-CSI-RS / A-SRS.

[0341] The DCI field may be included only in a single DCI, may be included only in a multi-DCI, or may be included in both a single DCI and a multi-DCI.

[0342] The DCI field may be a new DCI field defined in Rel. 18 or later, or a specific field defined in Rel. 17 or earlier may be used as the DCI field. The specific field may be a field for repetition of a PUSCH for multiple TRPs.

[0343] 21 is a diagram illustrating an example of selection / application of a TCI state according to a modification of embodiment 2-1 / 2-2. The TCI state indication, CORESET setting, and PDSCH schedule in the example illustrated in FIG. 21 are the same as those in FIG. 18 described above.

[0344] In the example shown in Fig. 21 , the DCI (associated DCI) transmitted on the PDCCH in each CORESET includes the above-mentioned DCI field, which indicates the code points included in the correspondence shown in Fig. 20 .

[0345] In the example shown in Fig. 21 , the DCI field included in the DCI associated with CORESET #1 indicates a code point of "00." The DCI field included in the DCI associated with CORESET #2 indicates a code point of "10." The DCI field included in the DCI associated with CORESET #3 indicates a code point of "11."

[0346] In the example shown in FIG. 21, CORESET #1 (and its associated PDCCH) schedules PDSCH #1-1 and PDSCH #1-2, CORESET #2 (and its associated PDCCH) schedules PDSCH #2-1 and PDSCH #2-2, and CORESET #3 (and its associated PDCCH) schedules PDSCH #3-1 and PDSCH #3-2.

[0347] In the example shown in FIG. 21, for the PDSCH scheduled by each CORESET, the UE selects one of the indicated TCI states based on the (code point of) the DCI field.

[0348] For example, since the code point of the DCI field corresponding to CORESET #1 is "00", the UE applies the first TCI state (TCI state #1) to PDSCH #1-1. At this time, since the PDSCH corresponding to CORESET #1 is a PDSCH with a single TRP, the UE does not receive PDSCH #1-2.

[0349] Also, since the code point of the DCI field corresponding to CORESET #2 is "10", the UE applies the first TCI state (TCI state #1) to PDSCH #2-1 and the second TCI state (TCI state #2) to PDSCH #2-2.

[0350] Also, since the code point of the DCI field corresponding to CORESET #3 is "11", the UE applies the second TCI state (TCI state #2) to PDSCH #3-1 and the first TCI state (TCI state #1) to PDSCH #3-2.

[0351] In addition, although the case where the joint / (separate) DL TCI state is instructed to the UE has been described in the above Figure 21 , the TCI state instructed to the UE may be the (separate) UL TCI state. Also, in Figure 21 , an example where TCI state #2 is applied to PDSCH #3 has been shown, but as described above, TCI state #3 may be applied to PDSCH #3.

[0352] <<Embodiment 2-3>> Embodiment 2-3 may be applied to, for example, a case where at least one of single DCI-based multi-TRP and single-TRP is used.

[0353] An index for a TRP corresponding to a channel / signal may be derived from the index of the particular channel / signal and the particular CORESET / PDSCH.

[0354] The channel / signal may be, for example, at least one of (scheduled) PDSCH / PUSCH and (triggered) PUCCH / Aperiodic (A)-SRS / A-CSI-RS.

[0355] An index for the TRP may be used to make a selection as to the TCI state to be set / indicated.

[0356] Each of the indicated TCI states may correspond to an index for the TRP. For example, a first one of the indicated TCI states may correspond to an index for the first TRP. Also, for example, a second one of the indicated TCI states may correspond to an index for the second TRP.

[0357] The particular channel / signal may be, for example, a scheduled / triggered PDSCH / PUSCH / PUCCH / A-SRS / A-CSI-RS.

[0358] The particular CORESET / PDCCH may be the CORESET / PDCCH that schedules / trigger the channel.

[0359] The UE / base station may derive an index for the TRP corresponding to the channel / signal from (the index associated with) the particular channel / signal and the particular CORESET / PDCCH.

[0360] For at least one of the multi-TRP PDSCH (NCJT or repeated transmission), the multi-TRP PDCCH / PUCCH / PUSCH repeated transmission, and the M-TRP SRS / CSI-RS, if the scheduling CORESET corresponds to a first value of the TRP index (e.g., TRP index=0), the UE may determine to apply a first TCI state among the indicated TCI states to the first (indexed) PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS, and may also determine to apply a second TCI state among the indicated TCI states to the second (indexed) PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS.

[0361] For at least one of the multi-TRP PDSCH (NCJT or repeated transmission), the multi-TRP PDCCH / PUCCH / PUSCH repeated transmission, and the M-TRP SRS / CSI-RS, if the scheduling CORESET corresponds to a second value of the TRP index (e.g., TRP index = 1), the UE may determine to apply a second TCI state among the indicated TCI states to the first (indexed) PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS. In addition, the UE may determine to apply the first TCI state among the indicated TCI states to the second (indexed) PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS.

[0362] A correspondence between an index related to a TRP corresponding to a scheduling CORESET and an order of TCI states to be applied to each channel / signal may be specified / configured. The correspondence may be specified in advance in a specification, or may be configured / instructed to a UE using higher layer signaling (RRC / MAC CE) / DCI.

[0363] For example, the correspondence relationship as shown in Fig. 22A may be defined / set. In the example shown in Fig. 22A, when the scheduling CORESET corresponds to the TRP index=0, the TCI state indicated by the index of each channel / signal is selected in ascending order, that is, the first TCI state, the second TCI state.

[0364] Also, in the example shown in Figure 22A, when the scheduling CORESET corresponds to an index = 1 for the TRP, the TCI state indicated by the index of each channel / signal is selected in ascending order, in the order of the second TCI state and the first TCI state.

[0365] In the correspondence relationship shown in FIG. 22A, "first" and "second" may be read interchangeably.

[0366] The mapping / association of the first / second TCI state to each channel / signal may be performed using existing methods (defined up to Rel. 16).

[0367] An RRC parameter (e.g., followUnifiedTCIstate) indicating that the common TCI state is followed may be associated with the CORESET / PDCCH configuration.

[0368] The configuration of the CORESET / PDCCH may not be associated with an RRC parameter (e.g., "followUnifiedTCIstate") indicating that a common TCI state is to be followed. In this case, the UE may select / determine the TCI state of a channel / signal scheduled / triggered by the CORESET / PDCCH from the indicated TCI states based on the TRP-related index. In this case, the UE may ignore the TCI state associated with the configuration of the CORESET / PDCCH.

[0369] An RRC parameter (e.g., followUnifiedTCIstate) indicating that a common TCI state is followed may not be associated with the CORESET / PDCCH configuration. In this case, the UE may apply the TCI state associated with the CORESET / PDCCH configuration to channels / signals scheduled / triggered by the CORESET / PDCCH.

[0370] 22B is a diagram illustrating an example of selection / application of a TCI state according to embodiments 2 and 3. In the example illustrated in FIG. 22B, the indicated TCI state, the CORESET setting, and the scheduled PDSCH are the same as those in FIG. 18 above.

[0371] In the example shown in Figure 22B, for a PDSCH scheduled by each CORESET, the UE selects one of the indicated TCI states based on the index of the PDSCH and the index of the TRP corresponding to the CORESET. At this time, the UE may follow the correspondence relationship as shown in Figure 22A above.

[0372] In the example shown in FIG. 22B, the UE determines to apply the first TCI state (TCI state #1) and the second TCI state (TCI state #2) to PDSCH #1-1 and PDSCH #1-2 associated with CORESET #1, respectively.

[0373] In the example shown in FIG. 22B, the UE determines to apply the second TCI state (TCI state #2) and the first TCI state (TCI state #1) to PDSCH #2-1 and PDSCH #2-2 associated with CORESET #2, respectively.

[0374] In the example shown in FIG. 22B, the UE determines to apply the second TCI state (TCI state #2) and the first TCI state (TCI state #1) to PDSCH #3-1 and PDSCH #3-2 associated with CORESET #3, respectively.

[0375] In addition, although the case where the joint / (separate) DL TCI state is instructed to the UE has been described in the above Figure 22B, the TCI state instructed to the UE may be the (separate) UL TCI state. Also, in Figure 22B, an example where TCI state #2 is applied to PDSCH #3 has been shown, but as described above, TCI state #3 may be applied to PDSCH #3.

[0376] In addition, when PDSCH / PDCCH / PUCCH / PUSCH / SRS / CSI-RS of a single TRP are scheduled / triggered, the UE may determine the TCI state to apply to each channel / signal according to specific rules.

[0377] For example, the UE may determine to (always) apply to each channel the first (or second) TCI state, among the indicated TCI states, determined from the correspondence between the index related to the TRP corresponding to the scheduling CORESET and the order of the TCI states to be applied to each channel / signal.

[0378] For example, the UE may be configured to apply either the first TCI state or the second TCI state among the indicated TCI states, and this configuration may be performed using higher layer signaling (RRC / MAC CE).

[0379] 23 is a diagram showing another example of TCI state selection / application according to embodiment 2-3. In the example shown in FIG. 23, two TCI states (here, TCI state #1 and TCI state #2 as joint / (separate) DL TCI states) are indicated to the UE. Here, the first TCI state is TCI state #1, and the second TCI state is TCI state #2.

[0380] In the example shown in Fig. 23, the CORESET setting and the PDSCH schedule are the same as those in the above-mentioned Fig. 19. Only the differences from Fig. 19 will be explained below.

[0381] In the example shown in Figure 23, CORESET #2 (and its associated PDCCH) schedules PDSCH #2-1, which is a PDSCH with a single TRP.

[0382] At this time, the UE determines to apply the first TCI state (TCI state #2) of the indicated TCI states to PDSCH #2-1, where the first TCI state is determined from the correspondence relationship defined in Figure 22A above.

[0383] According to embodiment 2-3, the TCI state to be applied to each channel / signal can be appropriately determined using an index related to the TRP and an index for each channel / signal.

[0384] Third Embodiment In a third embodiment, a TCI status list will be described.

[0385] The TCI status list may include at least one of a TRP specific TCI status list and a TRP common TCI status list.

[0386] The TRP-specific TCI status list may be a list of TCI statuses set for each TRP. The TRP-common TCI status list may be a TCI status list common to multiple TRPs.

[0387] A TRP-specific TCI status list may be used / configured in the case where multiple DCIs are used, and a TRP-common TCI status list may be used / configured in the case where a single DCI is used.

[0388] In addition, a TRP-specific TCI status list may be used / configured in the case where a single DCI is used, and a TRP-common TCI status list may be used / configured in the case where multiple DCIs are used.

[0389] <<Embodiment 3-1>> When a TRP-common TCI status list is used for multiple DCIs, one set of TCI status lists may be configured for a UE for each BWP / CC using RRC signaling.

[0390] A set of active TCI states corresponding to each CORESET pool index (eg, 0 and 1) may then be activated for the UE using a MAC CE.

[0391] In this case, the ID of the active TCI state for one (any) CORESET pool index may be indicated by an indication field in one MAC CE, and the indication field may correspond to one (any) CORESET pool index.

[0392] In this case, an indication field in one MAC CE may indicate a set of active TCI states for any / all (both) CORESET pool indexes. The set of active TCI states may be one or multiple (for example, up to two).

[0393] Figure 24 is a diagram showing an example of a TCI status list according to embodiment 3-1. In the example shown in Figure 24, a TCI status list common to TRPs and transmission and reception using multiple DCIs (DCI #1 and DCI #2) are configured for the UE. Note that Figure 24 shows the case of a joint TCI status, but it can also be applied to the case of a separate TCI status.

[0394] In the example shown in Figure 24, the UE activates (a set of) active TCI states corresponding to each TRP from the TCI state list using a MAC CE, and then the UE is instructed on the TCI state from the set corresponding to each TRP using each DCI.

[0395] <<Embodiment 3-2>> When a TRP-specific TCI status list is used for a single DCI, multiple (e.g., two) sets of TCI status lists may be configured for a UE for each BWP / CC using RRC signaling.

[0396] A set of one or more (eg, two) active TCI states corresponding to each of the indices (eg, 0 and 1) for the TRP may then be activated for the UE using the MAC CE.

[0397] In this case, an indication field in one MAC CE may indicate an ID of an active TCI state for an index (TCI state list index) related to one (any) TRP. The indication field may correspond to an index (TCI state list index) related to one (any) TRP. In this case, for multiple TRPs, the UE may indicate the active TCI state by the same number of MAC CEs as the number of TRPs.

[0398] In this case, an indication field in one MAC CE may indicate a set of active TCI states for any / all (both) CORESET pool indexes. The set of active TCI states may be one or multiple (for example, up to two).

[0399] Figure 25 is a diagram showing an example of a TCI status list according to embodiment 3-2. In the example shown in Figure 25, a TRP-specific TCI status list (a TCI status list for TRP #0 and a TCI status list for TRP #1) and transmission and reception by single DCI are configured for the UE. Note that Figure 25 shows the case of a joint TCI state, but it can also be applied to the case of a separate TCI state.

[0400] In the example shown in Figure 25, the UE activates (a set of) active TCI states corresponding to each TRP from the TCI state list using a MAC CE. This active TCI state may include at least one of the TCI states from the TCI state list for TRP #0 and the TCI states from the TCI state list for TRP #1. The UE is then instructed to select one or more TCI states from the set corresponding to each TRP using a DCI.

[0401] It should be noted that the MAC CEs that activate the TCI states shown in FIG. 25 may be separate MAC CEs or may be one (common) MAC CE.

[0402] <<Embodiment 3-3>> The (maximum) number (for example, X) of TCI states included in the TCI state list may be specified for each TRP.

[0403] X may be, for example, 128. X may be, for example, a number greater than 128.

[0404] The TRP-specific TCI state list may include X TCI state IDs for each TRP. To indicate the active TCI state from the TRP-specific TCI state list, the bit length of the TCI state ID field included in the MAC CE is log ２ It may be X bits (7 bits when X=128).

[0405] The TRP-common TCI state list may include Y x X TCI state IDs for each TRP, where Y may be the number of TRPs (e.g., 2). To indicate the active TCI state from the TRP-common TCI state list, the bit length of the TCI state ID field included in the MAC CE is log ２ It may be (Y×X) bits (8 bits when X=128 and Y=2).

[0406] Therefore, compared to the TRP-common TCI status list, the TRP-specific TCI status list can have a field in the MAC CE with fewer bits, thereby reducing the overhead of the MAC CE.

[0407] The MAC CE for the PDSCH TCI state for multiple TRPs of a single DCI, as defined in the existing specification (Rel. 16), includes a first TCI state ID field ("TCI state ID N,1 In the same octet as the " field (N is an integer), there is a field (C Ｎ This C Ｎ The field contributes to reducing the overhead of the MAC CE, and it can be present in the MAC CE because the TCI State ID field is 7 bits.

[0408] Therefore, keeping the number of TCI state IDs in the TRP-specific TCI state list to a number that can be indicated by 7 bits (i.e., 128) is effective in reducing MAC CE overhead.

[0409] Also, the (maximum) number of TCI states (e.g., Z) included in the TCI state list may be defined by adding up all TRPs. Z may be, for example, 128.

[0410] Thus, if the maximum number of TCI states is 128 in total for all TRPs, the TCI state ID included in the MAC CE can be 7 bits.

[0411] The TCI state ID for the first TCI state may be derived / determined from the TCI state list for the first TRP, and the TCI state ID for the second TCI state may be derived / determined from the TCI state list for the second TRP.

[0412] If only one TCI state list is configured for a UE per BWP / CC, the TCI state IDs for the first TCI state and the second TCI state may be derived / determined from that one TCI state list.

[0413] The MAC CE that activates the TCI state will be described below. The MAC CE in each embodiment of the present disclosure may be at least one of the MAC CEs described below.

[0414] In the following, a MAC CE that activates a TCI state may be a MAC CE that activates N>1, M>1 joint / separate TCI states.

[0415] In the following, the case where X=2 and Y=2 will be mainly described, but the values ​​of N and M may be 2 or more.

[0416] [Option 1] When separate TCI states of N=2 and M=2 are configured / enabled using RRC signaling, a MAC CE that is an extension of the MAC CE (Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) described in FIG. 8 above may be used.

[0417] The MAC CE may include a field indicating the UL TCI state or the DL TCI state (link direction), which may be defined in the reserved bit position in the first octet of the pre-extension MAC CE.

[0418] When applying this MAC CE to a separate TCI state with N=2 and M=2, the UE determines whether the first field (C ｉ ) may be ignored as a reserved bit. This allows the DCI to dynamically indicate / change the two common TCI states.

[0419] When the MAC CE is applied to a separate TCI state with N=2 and M=2, the UE determines whether the first field (C ｉ ) may be maintained to indicate whether a second TCI State ID field is present, thereby allowing the DCI to be used to dynamically indicate / change one or two common TCI states.

[0420] The UE may receive separate MAC CEs to indicate / change / update the DL TCI status and the UL TCI status, respectively.

[0421] One DCI (for example, DCI format 1_1 / 1_2) may include two specific fields that indicate the DL common TCI status and the UL common TCI status, respectively.

[0422] In addition, a DCI (e.g., DCI format 1_1 / 1_2) that schedules a DL channel may include a field that indicates the common TCI state of the DL, and a DCI (e.g., DCI format 0_1 / 0_2) that schedules a UL channel may include a field that indicates the common TCI state of the UL.

[0423] Fig. 26 is a diagram showing an example of the configuration of a MAC CE according to option 1. Fig. 26 is a MAC CE obtained by extending the MAC CE shown in Fig. 8 .

[0424] The third MAC CE shown in Fig. 26 includes a field (denoted as "U") indicating the UL TCI state or the DL TCI state, which is defined in the reserved bit position in the first octet of the MAC CE before extension.

[0425] [Option 2] When the N=2, M=2 (N=M=2) TCI state is configured / enabled using RRC signaling, a specific MAC CE may be used to activate the TCI state.

[0426] [[Option 2-1]] The specific MAC CE may include one or more fields indicating either the DL TCI state only, the UL TCI state only, or the DL and UL TCI states.

[0427] Each of the one or more fields may correspond to a specific code point of the TCI field included in the DCI.

[0428] The field (hereinafter referred to as C ｉ ) may have a particular number of bits (e.g., 2 bits).

[0429] The field (C ｉ ) is the TCI state ID field ("TCI state ID i,j ") may correspond to the TCI state ID field ("TCI state ID i,j ") is the first TCI state ID field ("TCI state ID i,1") and a second TCI state ID field ("TCI state ID i,2 ") and a third TCI state ID field ("TCI state ID i,3 ") and a second TCI state ID field ("TCI state ID i,4 ") and

[0430] In the present disclosure, the above i may be a number expressed in decimal. The above i expressed in binary may correspond to the number of TCI code points.

[0431] The UE may select a specific field (e.g., C ｉ ), for the (i+1)th codepoint of the TCI field included in the DCI, it may be determined whether the MAC CE includes the DL TCI status and the UL TCI status, only the DL TCI status, only the UL TCI status, or no TCI status ID.

[0432] The specific field (e.g., C ｉ ) indicates that the MAC CE does not include a TCI state ID (e.g., a first value (e.g., "00")) for the (i+1)th codepoint of the TCI field included in the DCI, the MAC CE may not include a corresponding TCI state ID field.

[0433] The specific field (e.g., C ｉ ) indicates that only the DL TCI state is included in the MAC CE (e.g., the second value (e.g., "01")) for the (i+1)th codepoint of the TCI field included in the DCI, then two DL TCI state ID fields may be included in the MAC CE.

[0434] The specific field (e.g., C ｉ) indicates that only the UL TCI state is included in the MAC CE (e.g., a third value (e.g., "10")) for the (i+1)th codepoint of the TCI field included in the DCI, then two UL TCI State ID fields may be included in the MAC CE.

[0435] The specific field (e.g., C ｉ ) indicates that the MAC CE includes a DL TCI state and a UL TCI state for the (i+1)th codepoint of the TCI field included in the DCI (e.g., a fourth value (e.g., "11")), the MAC CE may include two DL TCI State ID fields and two UL TCI State ID fields.

[0436] In option 2-1, the number of DL TCI states (IDs) / UL TCI states (IDs) corresponding to i may be a fixed value (eg, 2).

[0437] FIG. 27 is a diagram showing an example of the configuration of a MAC CE according to option 2-1.

[0438] In FIG. ｉ indicates a first value (for example, "00"), the UE determines that the MAC CE does not include a corresponding TCI State ID field.

[0439] In FIG. ｉ indicates a second value (for example, "01"), the UE determines that the MAC CE includes two corresponding DL TCI State ID fields.

[0440] In FIG. ｉ indicates a third value (for example, "10"), the UE determines that the MAC CE includes two corresponding UL TCI State ID fields.

[0441] In FIG. ｉ indicates a fourth value (for example, "11"), the UE determines that the MAC CE includes two corresponding DL TCI State ID fields and two corresponding UL TCI State ID fields.

[0442] In a MAC CE that activates a TCI state, the first and second octets of the TCI state ID field for i=0 must be present, and the octets after the third octet of the TCI state ID field for i=0 (octets after octet 6 in the example of Figure 27) are the corresponding C ｉ may exist based on the value of

[0443] [[Option 2-2]] The specific MAC CE may include one or more first and second fields for indicating either the DL TCI status only, the UL TCI status only, or the DL and UL TCI status.

[0444] Each of the first field and the second field may correspond to a specific code point of the TCI field included in the DCI.

[0445] The first field (hereinafter referred to as C ｉ ) and a second field (hereinafter referred to as D ｉ ) may each have a particular number of bits (e.g., 1 bit).

[0446] The UE reads the first field (e.g., C ｉ ) and a second field (e.g., D ｉ ), for the (i+1)th codepoint of the TCI field included in the DCI, it may be determined whether the MAC CE includes the DL TCI status and the UL TCI status, only the DL TCI status, only the UL TCI status, or no TCI status ID.

[0447] For example, the UE may ｉ ), it may be determined whether the MAC CE includes the corresponding DL TCI status and UL TCI status, or only the DL / UL TCI status.

[0448] For example, the first field (C ｉ) may be 1 bit and may correspond to the i+1th code point of the TCI field included in the DCI.

[0449] The field (C ｉ ) indicates a first value (e.g., “0”), the UE may determine that a TCI state ID field corresponding to only a DL TCI state or only a UL TCI state is present in the MAC CE.

[0450] The field (C ｉ ) indicates a second value (e.g., "1"), the UE may determine that TCI state ID fields corresponding to the DL TCI state and the UL TCI state are present in the MAC CE.

[0451] For example, when the UE determines that only DL / UL TCI status is included, it may select the second field (e.g., ｉ ), it may be determined whether the corresponding TCI state ID included in the MAC CE corresponds to a DL or UL TCI state.

[0452] [[Option 2-3]] The MAC CE used in Option 2-1 may include a field indicating the number of corresponding DL / UL TCI states (IDs).

[0453] This field is the first (or second) TCI state field of any TCI field code point ("TCI state ID"). N,1 (or "TCI state ID N,2 For example, this field may be defined in the reserved bit position of the MAC CE used in Option 2-1.

[0454] FIG. 28 is a diagram showing an example of the configuration of a MAC CE according to option 2-3.

[0455] In FIG. ｉ indicates a first value (for example, "00"), the UE determines that the MAC CE does not include a corresponding TCI State ID field.

[0456] In FIG. ｉ indicates a second value (for example, "01"), the UE determines that the MAC CE includes a corresponding DL TCI State ID field.

[0457] In FIG. ｉ indicates a third value (for example, "10"), the UE determines that the MAC CE includes a corresponding UL TCI State ID field.

[0458] In FIG. ｉ indicates a fourth value (for example, "11"), the UE determines that the MAC CE includes a corresponding DL TCI State ID field and a corresponding UL TCI State ID field.

[0459] 28, a field (hereinafter referred to as "E") indicating the number of corresponding DL / UL TCI states (IDs) is included. This field indicates the number of corresponding TCI state ID fields. In other words, this field indicates whether or not a corresponding TCI state ID field exists in the octet following the octet of this field.

[0460] For example, when E indicates a first value (e.g., "0"), the UE may determine that the number of TCI states (IDs) corresponding to E is 1. Also, for example, when E indicates a second value (e.g., "1"), the UE may determine that the number of TCI states (IDs) corresponding to E is 2.

[0461] [[Options 2-4]] The particular MAC CE may include a field (E) that indicates whether the next octet is present or not.

[0462] The specific MAC CE uses the first octet of each TCI codepoint (the first TCI state ID field corresponding to each TCI codepoint). i,1 The data may contain one or more fields indicating whether a "")" is present.

[0463] The field (hereinafter referred to as C ｉ) may have a specific number of bits (e.g., 1 bit). For example, the field (C ｉ ) indicates the first value (for example, 0), ｉ ) the smallest TCI state ID field ("TCI state ID i,j ") is the TCI state ID i,1 For example, the field (C ｉ ) indicates a second value (e.g., 0), the field (C ｉ ) the smallest TCI state ID field ("TCI state ID i,j ") is the TCI state ID i,2 may be.

[0464] The field (C ｉ ) is the TCI state ID field ("TCI state ID i,j ") may correspond to the TCI state ID field ("TCI state ID i,j ") is the first TCI state ID field ("TCI state ID i,1 ") and a second TCI state ID field ("TCI state ID i,2 ") and a third TCI state ID field ("TCI state ID i,3 ") and a second TCI state ID field ("TCI state ID i,4 ") and

[0465] The field (C ｉ ) may not be included in the particular MAC CE. In this case, the first octet of each TCI codepoint may always be present.

[0466] TCI state ID field ("TCI state ID i,j "), the value of j may correspond to a first DL TCI state, a first UL TCI state, a second DL TCI state, and a second UL TCI state.

[0467] For example, j=1 may correspond to a first DL TCI state, j=2 may correspond to a first UL TCI state, j=3 may correspond to a second DL TCI state, and j=4 may correspond to a second UL TCI state.

[0468] Also, for example, j=1 may correspond to the second UL TCI state, j=2 may correspond to the first DL TCI state, j=3 may correspond to the second UL TCI state, and j=4 may correspond to the second DL TCI state.

[0469] Also, for example, j=1 may correspond to the first DL TCI state, j=2 may correspond to the second DL TCI state, j=3 may correspond to the first UL TCI state, and j=4 may correspond to the second UL TCI state.

[0470] Also, for example, j=1 may correspond to the first UL TCI state, j=2 may correspond to the second UL TCI state, j=3 may correspond to the first DL TCI state, and j=4 may correspond to the second DL TCI state.

[0471] The ordering of the first DL TCI state, the first UL TCI state, the second DL TCI state, and the second UL TCI state, which correspond to j=1 to 4, respectively, may be a fixed order.

[0472] FIG. 29 is a diagram showing an example of the configuration of a MAC CE according to option 2-4 / 2-5.

[0473] In FIG. ｉ indicates a first value (for example, "0"), the UE determines that the MAC CE does not include the corresponding TCI State ID field (the first octet of the TCI State ID field).

[0474] In FIG. ｉ indicates a second value (for example, "1"), the UE determines that the MAC CE includes the corresponding TCI State ID field (the first octet of the TCI State ID field).

[0475] In FIG. 29, the MAC CE includes a field (E) that indicates whether the next octet exists.

[0476] According to the above-mentioned options 2-4, for example, even when activating either the first (or second) DL TCI state and the first (or second) UL TCI state corresponding to a certain TCI codepoint, overhead can be reduced by using only one octet (instead of two octets).

[0477] [[Options 2-5]] The particular MAC CE may include a field (E) that indicates whether the next octet is present or not.

[0478] The particular MAC CE may include one or more fields that indicate the ordering of the TCI states for the corresponding TCI State ID field.

[0479] The field (hereinafter referred to as C ｉ ) may have a particular number of bits (e.g., 1 bit).

[0480] The field (C ｉ ) is the TCI state ID field ("TCI state ID i,j ") may correspond to the TCI state ID field ("TCI state ID i,j ") is the first TCI state ID field ("TCI state ID i,1 ") and a second TCI state ID field ("TCI state ID i,2 ") and a third TCI state ID field ("TCI state ID i,3 ") and a second TCI state ID field ("TCI state ID i,4 ") and

[0481] The first octet of each TCI codepoint may always be present. ｉ ) may not be included in the specific MAC CE. In this case, the correspondence between the TCI state ID field and the TCI state is ｉ This may be the same as when the field indicates a first value (for example, 0 (or 1)).

[0482] TCI state ID field ("TCI state ID i,j "), the value of j may correspond to a first DL TCI state, a first UL TCI state, a second DL TCI state, and a second UL TCI state.

[0483] For example, C ｉ When the field indicates a first value (e.g., 0 (or 1)), the UE may determine that, for the order of the corresponding TCI Status ID fields, j=1 corresponds to the first DL TCI state, j=2 corresponds to the first UL TCI state, j=3 corresponds to the second DL TCI state, and j=4 corresponds to the second UL TCI state, respectively. That is, C ｉ When the field indicates a first value (e.g., 0 (or 1)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order DL, then UL, and then in the order of the first and second TCI states.

[0484] Also, for example, C ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE may determine that, for the order of the corresponding TCI Status ID fields, j=1 corresponds to the first UL TCI state, j=2 corresponds to the first DL TCI state, j=3 corresponds to the second UL TCI state, and j=4 corresponds to the second DL TCI state, respectively. That is, C ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order UL, then DL, and then in the order of the first and second TCI states.

[0485] Also, for example, C ｉ When the field indicates a first value (e.g., 0 (or 1)), the UE may determine that, for the order of the corresponding TCI Status ID fields, j=1 corresponds to the first DL TCI status, j=2 corresponds to the second DL TCI status, j=3 corresponds to the first UL TCI status, and j=4 corresponds to the second UL TCI status. That is, C ｉWhen the field indicates a first value (e.g., 0 (or 1)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order of the first and second TCI states, then in the order of DL and UL.

[0486] Also, for example, C ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE may determine that, for the order of the corresponding TCI Status ID fields, j=1 corresponds to the first UL TCI status, j=2 corresponds to the second UL TCI status, j=3 corresponds to the first DL TCI status, and j=4 corresponds to the second DL TCI status. That is, C ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order of the first and second TCI states, then in the order of UL and DL.

[0487] The configuration of MAC CE according to option 2-5 will be described with reference to FIG.

[0488] In FIG. 29, the UE ｉ Based on the value of ｉ Determine which TCI state (first DL / UL TCI state, second DL / UL TCI state) the TCI state ID field corresponds to.

[0489] In FIG. 29, the MAC CE includes a field (E) that indicates whether the next octet exists.

[0490] [[Option 2-6]] Option 2-6 is a variation of option 2-5.

[0491] The particular MAC CE may include a field (E) that indicates whether the next octet is present or not.

[0492] The particular MAC CE may include one field indicating the ordering of the TCI states with respect to the TCI State ID field.

[0493] This field (which may be referred to as C hereinafter) may have a specific number of bits (for example, 1 bit).

[0494] The first octet of each TCI codepoint may always be present. The field (C) may not be included in the specific MAC CE. In this case, the correspondence between the TCI state ID field and the TCI state may be the same as when the C field indicates the first value (e.g., 0 (or 1)).

[0495] TCI state ID field ("TCI state ID i,j "), the value of j may correspond to a first DL TCI state, a first UL TCI state, a second DL TCI state, and a second UL TCI state.

[0496] For example, when the C field indicates a first value (e.g., 0 (or 1)), the UE may determine that, with respect to the order of the TCI state ID fields included in the MAC CE, j=1 corresponds to the first DL TCI state, j=2 corresponds to the first UL TCI state, j=3 corresponds to the second DL TCI state, and j=4 corresponds to the second UL TCI state. That is, when the C field indicates a first value (e.g., 0 (or 1)), the UE may determine that the TCI state ID fields correspond to each TCI state in the order of DL, UL, and then the first and second TCI states.

[0497] Also, for example, when the C field indicates a second value (for example, 1 (or 0)), the UE may determine that, with respect to the order of the TCI state ID fields included in the MAC CE, j=1 corresponds to the first UL TCI state, j=2 corresponds to the first DL TCI state, j=3 corresponds to the second UL TCI state, and j=4 corresponds to the second DL TCI state. ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order UL, then DL, and then in the order of the first and second TCI states.

[0498] Also, for example, when the C field indicates a first value (for example, 0 (or 1)), the UE may determine that, with respect to the order of the TCI state ID fields included in the MAC CE, j=1 corresponds to the first DL TCI state, j=2 corresponds to the second DL TCI state, j=3 corresponds to the first UL TCI state, and j=4 corresponds to the second UL TCI state. That is, C ｉ When the field indicates a first value (e.g., 0 (or 1)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order of the first and second TCI states, then in the order of DL and UL.

[0499] Also, for example, when the C field indicates a second value (for example, 1 (or 0)), the UE may determine that, with respect to the order of the TCI state ID fields included in the MAC CE, j=1 corresponds to the first UL TCI state, j=2 corresponds to the second UL TCI state, j=3 corresponds to the first DL TCI state, and j=4 corresponds to the second DL TCI state. That is, C ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE may determine that the TCI state ID field corresponds to each TCI state, first in the order of the first and second TCI states, then in the order of UL and DL.

[0500] FIG. 30 is a diagram showing an example of the configuration of a MAC CE according to option 2-6.

[0501] In FIG. 30, the UE determines which TCI state (first DL / UL TCI state, second DL / UL TCI state) the TCI state ID field included in the MAC CE corresponds to based on the value of C.

[0502] In FIG. 30, the MAC CE includes a field (E) that indicates whether the next octet exists.

[0503] According to the above options 2-5 and 2-6, the order of the TCI states corresponding to the TCI state ID field can be changed, so that TCI states that do not require activation notification are not notified to the UE again, thereby reducing overhead.

[0504] [[Options 2-7]] The particular MAC CE may include a field (E) that indicates whether the next octet is present or not.

[0505] The particular MAC CE may include one or more fields that indicate whether the corresponding TCI State ID field is in a joint TCI state or a separate TCI state.

[0506] The field (hereinafter referred to as C ｉ ) may have a particular number of bits (e.g., 1 bit).

[0507] The field (C ｉ ) is the TCI state ID field ("TCI state ID i,j ") may correspond to the TCI state ID field ("TCI state ID i,j ") is the first TCI state ID field ("TCI state ID i,1 ") and a second TCI state ID field ("TCI state ID i,2 ") and a third TCI state ID field ("TCI state ID i,3 ") and a second TCI state ID field ("TCI state ID i,4 ").

[0508] The first octet of each TCI codepoint may always be present. ｉ ) may not be included in the specific MAC CE. In this case, whether the TCI state ID field is in the joint TCI state or the separate TCI state depends on C ｉ This may be the same as when the field indicates a first value (for example, 0 (or 1)).

[0509] TCI state ID field ("TCI state ID i,j "), the value of j may correspond to a first DL / UL TCI state and a second DL / UL TCI state.

[0510] For example, C ｉWhen the field indicates a first value (e.g., 0 (or 1)), the UE ｉ For the first TCI state and the second TCI state among the TCI state ID fields corresponding to the field, it may be determined that the TCI state of the i+1th code point in the TCI state list for the joint TCI state is activated.

[0511] Also, for example, C ｉ When the field indicates a second value (e.g., 1 (or 0)), the UE ｉ For the first TCI state and the second TCI state among the TCI state ID fields corresponding to the field, it may be determined that the TCI state of the i+1th code point in the TCI state list for the separate TCI state is activated.

[0512] A TCI state list for a joint TCI state and a TCI state list for a separate TCI state may be configured for the UE separately.

[0513] In this case, if C ｉ If the field indicates a joint TCI state, the UE ｉ It may be determined that the TCI state ID corresponding to the field corresponds to the TCI state list for the joint TCI state.

[0514] Also, in this case, if C ｉ If the field indicates a separate TCI state, the UE ｉ It may be determined that the TCI state ID corresponding to the field corresponds to a TCI state list for separate TCI states.

[0515] A TCI state list for the joint TCI state and a TCI state list for the separate TCI state may be configured for the UE.

[0516] In this case, C ｉ Regardless of whether the field indicates a joint / separate TCI state, the UE ｉIt may be determined that the TCI state ID corresponding to the field corresponds to the common TCI state list.

[0517] 31A and 31B are diagrams showing an example of the configuration of a MAC CE according to option 2-7.

[0518] In FIG. 31A, the UE ｉ Based on the value of the field, ｉ It is determined whether the TCI state ID field corresponding to the field indicates a TCI state, either a joint TCI state or a separate TCI state.

[0519] In the example shown in FIG. ｉ If the value of the field is 0, it indicates that the first TCI state and the second TCI state to be activated are joint TCI states. ｉ If the value of the field is 1, it indicates that the first TCI state and the second TCI state to be activated are separate TCI states.

[0520] In addition, C ｉ The correspondence between the field value and the joint / separate TCI state is merely an example and is not limited to this. For example, ｉ If the value of the field is 0 (or 1), it may indicate that the first TCI state to be activated is a joint (or separate) TCI state, and the second TCI state to be activated is a joint (or separate) TCI state. For example, C ｉ If the value of the field is 1 (or 0), it may indicate that the first TCI state to be activated is a joint (or separate) TCI state, and the second TCI state to be activated is a separate (or joint) TCI state.

[0521] In FIG. 31A, the MAC CE includes a field (E) that indicates whether the next octet exists.

[0522] In the above Option 2-7 (FIGS. 31A and 31B), a 1-bit C ｉAlthough an example in which the field is configured over one octet has been shown, ｉ The field configuration is not limited to this. For example, ｉ Each field may have more than one bit and may span multiple octets. ｉ If the fields each have multiple bits, they may include bits indicating the order of the TCI states corresponding to the TCI state ID, as described in options 2-4 and 2-5 above.

[0523] [[Option 2-8]] Option 2-8 is a modified example of the above-mentioned option 2-7. Therefore, in this option, the differences from the above-mentioned option 2-7 will be explained.

[0524] C included in the specific MAC CE ｉ The field may have a specific number of bits (e.g., 2 bits). For example, C ｉ The first bit of the field may indicate whether the corresponding first TCI state is a joint TCI state or a separate TCI state, and C ｉ The second bit of the field may indicate whether the corresponding second TCI state is a joint TCI state or a separate TCI state.

[0525] For example, C ｉ When the field indicates a first value (e.g., 00 (or 01 / 10 / 11)), the UE ｉ For the first TCI state and the second TCI state among the TCI state ID fields corresponding to the field, it may be determined that the TCI state of the i+1th code point in the TCI state list for the joint TCI state is activated.

[0526] Also, for example, C ｉ When the field indicates a second value (e.g., 01 (or 00 / 10 / 11)), the UE ｉIt may be determined that for a first TCI state, among the TCI state ID fields corresponding to the field, the TCI state of the i+1-th code point in the TCI state list for the joint TCI state is activated, and for a second TCI state, the TCI state of the i+1-th code point in the TCI state list for the separate TCI state is activated.

[0527] Also, for example, C ｉ When the field indicates a third value (e.g., 10 (or 00 / 01 / 11)), the UE ｉ It may be determined that, for a first TCI state, the TCI state of the i+1-th code point in the TCI state list for the separate TCI state is activated, and for a second TCI state, the TCI state of the i+1-th code point in the TCI state list for the joint TCI state is activated, among the TCI state ID fields corresponding to the field.

[0528] Also, for example, C ｉ When the field indicates a fourth value (for example, 11 (or 00 / 01 / 10)), the UE ｉ For the first TCI state and the second TCI state among the TCI state ID fields corresponding to the field, it may be determined that the TCI state of the i+1th code point in the TCI state list for the separate TCI state is activated.

[0529] FIG. 32 is a diagram showing an example of the configuration of a MAC CE according to option 2-8.

[0530] In FIG. 32, the UE ｉ Based on the value of the field, ｉ It is determined whether the TCI state ID field corresponding to the field indicates a TCI state, either a joint TCI state or a separate TCI state.

[0531] 33 is a diagram showing another example of the configuration of MAC CE according to option 2-8. In the example shown in FIG. ｉIf the value of the field is 00, it indicates that the first TCI state and the second TCI state to be activated are joint TCI states. ｉ If the value of the field is 01, it indicates that the first TCI state to be activated is a joint TCI state, and the second TCI state to be activated is a separate TCI state. ｉ If the value of the field is 01, it indicates that the first TCI state to be activated is a separate TCI state, and the second TCI state to be activated is a joint TCI state. ｉ If the value of the field is 11, it indicates that the first TCI state and the second TCI state to be activated are separate TCI states.

[0532] In addition, C ｉ The correspondence between the field values ​​and the joint / separate TCI states is merely an example and is not limited to this.

[0533] In the above option 2-8 (FIGS. 32 and 33), the 2-bit C ｉ Although an example in which the field is configured over two octets has been shown, ｉ The field configuration is not limited to this. For example, ｉ The fields may each have three or more bits and may span multiple octets. ｉ If the fields each have more than two bits, they may also include bits indicating the order of the TCI states corresponding to the TCI state ID, as described in options 2-4 and 2-5 above.

[0534] According to the above options 2-7 and 2-8, it is possible to activate the joint TCI status field and the separate TCI status field in one MAC CE. Also, by notifying the activation of the joint TCI status as well as the separate TCI status, it is possible to reduce the TCI status ID field.

[0535] According to the third embodiment described above, it is possible to appropriately define the list of TCI states and the MAC CE that activates the TCI states.

[0536] <Modifications> Each embodiment / option / choice of the present disclosure may be supported in intra-cell / inter-cell beam direction.

[0537] In each embodiment / option / alternative of the present disclosure, a TRP-specific (additional) Transmitted Precoding Matrix Indicator (TPMI) field / SRI field for PUSCH using multiple TRPs in Rel. 17 may be used.

[0538] <Supplementary Note> At least one of the above-described embodiments may be applied only to UEs that have reported or support a specific UE capability.

[0539] The specific UE capability may indicate at least one of the following: - Supporting specific processing / operation / control / information for at least one of the above embodiments; - Supporting either a TRP-specific TCI state list and a TRP-common TCI state list; - Supporting joint TCI states / separate TCI states; - Supporting common TCI states.

[0540] Furthermore, the specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., cell, band, BWP), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)).

[0541] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0542] Furthermore, at least one of the above-described embodiments may be applied when the UE is configured with specific information related to the above-described embodiments by higher layer signaling, such as information indicating that a common TCI state is enabled, any RRC parameter for a specific release (e.g., Rel. 18), etc.

[0543] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0544] (Supplementary Note A) The following invention is added to one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiving unit that receives multiple downlink control information (DCI) for indicating multiple transmission configuration indication (TCI) states; and a control unit that determines which of the multiple TCI states to apply to a signal based on an index related to a transmission / reception point associated with a control resource set that schedules or triggers the signal to which the TCI state is to be applied, wherein each of the multiple TCI states is a TCI state that is applied to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state that is applied to a DL signal and a TCI state that is applied to a UL signal. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the control unit applies one of the multiple TCI states to the signal even if the control resource set is not associated with an upper layer parameter indicating that the control resource set complies with the multiple TCI states. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the controller applies to the signal a TCI state associated with the control resource set if no higher layer parameter indicating that the control resource set is subject to the plurality of TCI states is associated with the control resource set. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the plurality of TCI states are activated from a TCI state list common to a plurality of transmission / reception points.

[0545] (Supplementary Note B) The following invention is supplemented with respect to one embodiment of the present disclosure: [Supplementary Note 1] A terminal comprising: a receiving unit that receives one downlink control information (DCI) for indicating a plurality of transmission configuration indication (TCI) states; and a control unit that determines which of the plurality of TCI states to apply to a signal based on at least one of an index related to a transmission / reception point associated with a control resource set that schedules or triggers a signal to which a TCI state is to be applied and an index related to the signal, wherein each of the plurality of TCI states is a TCI state applied to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state applied to a DL signal and a TCI state applied to a UL signal. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the receiving unit further receives instruction information indicating at least one of whether the signal is intended for a single transmission / reception point or multiple transmission / reception points and an order of application of the multiple TCI states, and the control unit further determines which TCI state of the multiple TCI states to apply to the signal based on the instruction information. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the control unit determines which TCI state of the multiple TCI states to apply to the signal based on a correspondence relationship between an index related to the transmission / reception point and an order of application of the multiple TCI states. [Supplementary Note 4] The terminal according to any of Supplementary Notes 1 to 3, wherein the multiple TCI states are activated from a TCI state list specific to a transmission / reception point.

[0546] (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 embodiments of the present disclosure or a combination thereof.

[0547] 34 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0548] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0549] 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.

[0550] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0551] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0552] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0553] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0554] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0555] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0556] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0557] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0558] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, 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), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0559] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0560] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0561] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0562] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0563] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0564] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0565] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0566] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0567] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0568] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0569] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0570] 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 an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0571] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0572] 35 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0573] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0574] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0575] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0576] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0577] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0578] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0579] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0580] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0581] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0582] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0583] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0584] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0585] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0586] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0587] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0588] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0589] The transceiver 120 may transmit multiple downlink control information (multi-DCI) for indicating multiple transmission configuration indication (TCI) states. The controller 110 may indicate which of the multiple TCI states to apply to a signal using an index related to a transmission / reception point associated with a control resource set that schedules or triggers a signal to which a TCI state is to be applied. Each of the multiple TCI states may be a TCI state applied to both a downlink (DL) signal and an uplink (UL) signal (joint TCI state), or a TCI state applied to a DL signal (separate DL TCI state) and a TCI state applied to a UL signal (separate UL TCI state) (first and second embodiments).

[0590] The transceiver 120 may transmit one downlink control information (single DCI) for indicating multiple transmission configuration indication (TCI) states. The controller 110 may indicate which of the multiple TCI states to apply to a signal using at least one of an index related to a transmission / reception point associated with a control resource set that schedules or triggers a signal to which a TCI state is to be applied and an index related to the signal. Each of the multiple TCI states may be a TCI state applied to both a downlink (DL) signal and an uplink (UL) signal (joint TCI state), or a TCI state applied to a DL signal (separate DL TCI state) and a TCI state applied to a UL signal (separate UL TCI state) (first and second embodiments).

[0591] (User terminal) Fig. 36 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0592] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0593] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0594] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0595] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0596] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0597] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0598] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0599] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0600] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0601] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0602] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0603] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0604] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0605] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0606] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0607] 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.

[0608] The transceiver 220 may receive multiple downlink control information (multi-DCI) for indicating multiple transmission configuration indication (TCI) states. The controller 210 may determine which of the multiple TCI states to apply to a signal based on an index related to a transmission / reception point associated with a control resource set that schedules or triggers the signal to which the TCI state is to be applied. Each of the multiple TCI states may be a TCI state applied to both a downlink (DL) signal and an uplink (UL) signal (joint TCI state), or a TCI state applied to a DL signal (separate DL TCI state) and a TCI state applied to a UL signal (separate UL TCI state) (first and second embodiments).

[0609] The control unit 210 may apply any one of the multiple TCI states to the signal even if the control resource set is not associated with an upper layer parameter indicating that it follows the multiple TCI states (second embodiment).

[0610] The control unit 210 may apply the TCI state associated with the control resource set to the signal if no higher layer parameter indicating that the control resource set is subject to the multiple TCI states is associated with the control resource set (second embodiment).

[0611] The multiple TCI states may be activated from a TCI state list common to multiple transmission and reception points (third embodiment).

[0612] The transceiver unit 220 may receive one downlink control information (DCI) for indicating multiple transmission configuration indication (TCI) states. The control unit 210 may determine which of the multiple TCI states to apply to a signal based on at least one of an index related to a transmission / reception point associated with a control resource set that schedules or triggers a signal to which a TCI state is to be applied and an index related to the signal. Each of the multiple TCI states may be a TCI state applied to both a downlink (DL) signal and an uplink (UL) signal (a joint TCI state), or a TCI state applied to a DL signal (a separate DL TCI state) and a TCI state applied to a UL signal (a separate UL TCI state) (first and second embodiments).

[0613] The transceiver 220 may further receive instruction information (DCI field) indicating whether the signal is intended for a single transceiver point or multiple transceiver points and / or the order in which the multiple TCI states are to be applied. The control unit 210 may further determine which of the multiple TCI states to apply to the signal based on the instruction information (second embodiment).

[0614] The control unit 210 may determine which of the multiple TCI states to apply to the signal based on the correspondence between the index related to the transmitting / receiving point and the order of application of the multiple TCI states (second embodiment).

[0615] The plurality of TCI states may be activated from a transmitting / receiving point specific TCI state list (third embodiment).

[0616] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. 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 a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0617] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0618] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 37 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 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.

[0619] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0620] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0621] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0622] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0623] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0624] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0625] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0626] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0627] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0628] Furthermore, 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 between each device.

[0629] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0630] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0631] 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 (e.g., 1 ms) that is independent of numerology.

[0632] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0633] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0634] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0635] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0636] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0637] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0638] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0639] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0640] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0641] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0642] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0643] In addition, 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, each of which may be composed of one or more resource blocks.

[0644] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0645] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0646] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0647] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0648] 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 the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0649] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. 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 subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0650] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0651] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0652] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0653] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0654] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0655] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0656] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0657] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0658] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0659] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0660] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0661] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0662] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0663] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0664] A base station can accommodate one or more (e.g., three) cells. When 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 can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0665] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0666] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0667] A mobile station may also be referred to as 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.

[0668] At least one of the base station and the 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, etc.

[0669] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0670] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include 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.

[0671] 38 is a diagram showing 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, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM 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 unit 59, and a communication module 60.

[0672] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) 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 a user.

[0673] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0674] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0675] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0676] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0677] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0678] 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 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0679] 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 an external device. For example, it transmits and receives various information to and from the 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 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0680] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0681] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0682] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0683] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0684] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0685] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0686] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0687] Each aspect / embodiment described in the present disclosure may be a technology other than 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, for example, an integer or decimal number)), 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 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0688] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0689] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0690] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0691] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0692] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0693] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0694] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0695] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may 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, "connected" may be read as "access."

[0696] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0697] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0698] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0699] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0700] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0701] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0702] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiver for receiving a first DCI for indicating a plurality of transmission configuration indication (TCI) states; a control unit that determines which TCI state of the plurality of TCI states to apply to the signal based on at least one of an index related to a transmission / reception point (TRP) corresponding to the signal to which the TCI state is to be applied and an index related to the signal; A terminal, wherein each of the plurality of TCI states is a TCI state that applies to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state that applies to a DL signal or an UL signal.

2. The terminal of claim 1 , wherein the plurality of TCI states are activated from a TCI state list common to a plurality of TRPs.

3. The control unit determines which of the plurality of TCI states to apply to the channel based on an index related to a TRP corresponding to the channel to which the TCI state is to be applied; The terminal according to claim 1 , wherein each of the plurality of TCI states is a TCI state that applies to both a DL channel and an UL channel, or a TCI state that applies to a DL channel or an UL channel.

4. The receiving unit receives a second DCI; The terminal according to claim 1 , wherein the control unit determines whether the signal transmission is a single-TRP transmission or a multi-TRP transmission based on a field included in the second DCI.

5. receiving a first Downlink Control Information (DCI) for indicating a plurality of Transmission Configuration Indication (TCI) states; determining which of the plurality of TCI states to apply to the signal based on at least one of an index of a transmission / reception point (TRP) corresponding to the signal to which the TCI state is to be applied and an index of the signal; A wireless communication method for a terminal, wherein each of the plurality of TCI states is a TCI state applied to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state applied to a DL signal or an UL signal.

6. a transmitter configured to transmit a first DCI for indicating a plurality of TCI states; a control unit that indicates which of the plurality of TCI states is to be applied to the signal using at least one of an index related to a transmission / reception point (TRP) corresponding to the signal to which the TCI state is to be applied and an index related to the signal; A base station, wherein each of the plurality of TCI states is a TCI state that applies to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state that applies to a DL signal or an UL signal.

7. A system including a terminal and a base station, The terminal a receiver for receiving a first DCI for indicating a plurality of transmission configuration indication (TCI) states; a control unit that determines which TCI state of the plurality of TCI states to apply to the signal based on at least one of an index related to a transmission / reception point (TRP) corresponding to the signal to which the TCI state is to be applied and an index related to the signal; Each of the plurality of TCI states is a TCI state that applies to both a downlink (DL) signal and an uplink (UL) signal, or a TCI state that applies to a DL signal or an UL signal; The base station a transmitter for transmitting the DCI; A system having a control unit that uses at least one of an index related to the TRP and an index related to the signal to indicate which of the multiple TCI states to apply to the signal.