Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure includes: a reception unit that receives resource set configuration information for a sounding reference signal (SRS) and / or a channel state information reference signal (CSI-RS), and downlink control information (DCI) instructing a transmission configuration instruction (TCI) state applicable to a plurality of signals including the SRS and / or the CSI-RS; and a control unit that determines, on the basis of the number of SRS resource sets and / or the number of CSI-RS resource sets, a TCI state to be applied to the SRS and / or the CSI-RS. According to the one embodiment of the present disclosure, a TCI state instruction can suitably be carried out.

Description

[Technical Field]

[0001] The present disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system. 、 base station and systems Regarding. [Background technology]

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified 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) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 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 Summary of the Invention [Problem to be solved by the invention]

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

[0006] It is being considered to apply the configured / 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 degradation of communication quality, degradation of throughput, etc.

[0007] Therefore, the present disclosure provides a terminal and a wireless communication method that appropriately perform TCI status indication. 、 base station and systems One of the aims is to provide [Means for solving the problem]

[0008] A terminal according to one aspect of the present disclosure includes: 1 or more Sounding Reference Signal (SRS) Resource Set Set a receiver for receiving configuration information and downlink control information (DCI) indicating a transmission configuration indication (TCI) state applicable to multiple types of signals including SRS; If the DCI indicates two TCI states, the configured Based on the number of SRS resource sets configured SRS Resource Set a control unit for determining the TCI state to be applied to the When the number of the configured SRS resource sets is one, the control unit determines, based on an upper layer parameter, whether a first TCI state of the two TCI states indicated is applied to the configured SRS resource set, or a second TCI state of the two TCI states indicated is applied to the configured SRS resource set. do. [Effects of the Invention]

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

[0010] [Figure 1] 1A and 1B are diagrams illustrating an example of communication between a mobile unit and a transmission point (eg, RRH). [Figure 2] 2A to 2C are diagrams illustrating an example of schemes 0 to 2 for SFN. [Figure 3] 3A and 3B show an example of Scheme 1. [Figure 4] 4A-4C illustrate an example of a Doppler pre-compensation scheme. [Figure 5] FIG. 5 is a diagram illustrating an example of simultaneous beam updating across multiple CCs. [Figure 6] 6A and 6B are diagrams showing an example of a common beam. [Figure 7] FIG. 7 is a diagram showing an example of MAC CE defined in Rel.16. [Figure 8] FIG. 8 is a diagram showing another example of MAC CE defined in Rel.16. [Figure 9] FIG. 9 is a diagram showing another example of MAC CE defined in Rel.16. [Figure 10] 10A and 10B are diagrams showing an example of a TCI field included in DCI. [Figure 11] FIG. 11 is a diagram illustrating an example of determining the TCI state according to embodiment 1-1. [Figure 12] FIG. 12 is a diagram illustrating an example of an instruction of the TCI state according to embodiment 1-1. [Figure 13] FIG. 13 is a diagram illustrating an example of determining the TCI state according to embodiment 1-2. [Figure 14] FIG. 14 is a diagram illustrating an example of determining the TCI state according to the first to third embodiments. [Figure 15] FIG. 15 is a diagram illustrating an example of determining the TCI state according to the first to fourth embodiments. [Figure 16]FIG. 16 is a diagram illustrating an example of a switching method for the TCI state according to embodiment 2-1. [Figure 17] FIG. 17 is a diagram illustrating an example of a switching field according to embodiment 3-5. [Figure 18] 18A to 18D are diagrams illustrating an example of application of the TCI state in the third embodiment. [Figure 19] 19A and 19B are diagrams illustrating an example of a switching field according to the embodiment 4-5. [Figure 20] 20A to 20D are diagrams illustrating an example of application of the TCI state in the fourth embodiment. [Figure 21] 21A to 21D are diagrams illustrating an example of application of the TCI state in the fifth embodiment. [Figure 22] 22A to 22D are diagrams illustrating an example of application of the TCI state in the sixth embodiment. [Figure 23] 23A to 23D are diagrams illustrating an example of application of the TCI state in the seventh embodiment. [Figure 24] 24A to 24D are diagrams illustrating an example of application of the TCI state in the eighth embodiment. [Figure 25] FIG. 25 is a diagram illustrating an example of a TCI state according to a modification of the eighth embodiment. [Figure 26] 26A to 26D are diagrams showing an example of application of the TCI state in the ninth embodiment. [Figure 27] 27A to 27D are diagrams showing other examples of application of the TCI state in the ninth embodiment. [Figure 28] FIG. 28 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 29] FIG. 29 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 30] FIG. 30 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 31]FIG. 31 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 32] FIG. 32 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (TCI, spatial relations, QCL) In NR, it is being 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 the UE of at least one of a signal and a channel (referred to as signal / channel) based on the 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 which 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] A QCL is an index that indicates the statistical properties of a signal / channel. 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 the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same between these different signals / channels (i.e., they are QCLs 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 determined based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with an sQCL (spatial QCL).

[0016] A plurality of types (QCL types) of QCLs may be defined. For example, four QCL types A and B may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may also be referred to as QCL parameters) are listed below: 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 assumption by a UE 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 target channel (in other words, the Reference Signal (RS) for the 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 CSI-RS for tracking (also called a Tracking Reference Signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0023] An SSB is a signal block that includes at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). 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 relationship of QCL type X with (the DMRS of) a certain channel / signal, and this RS may be called a QCL source of QCL type X in the TCI state.

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

[0026] For example, TRS1-1, 1-2, 1-3, and 1-4 are transmitted, and TRS1-1 is indicated as a QCL type C / D RS according to the TCI status of the PDSCH. By indicating 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 PDSCH. In this case, the QCL source of the PDSCH is TRS1-1, and the QCL target is the DMRS for PDSCH.

[0027] (Default TCI State / Default Spatial Relationship / Default PL-RS) In Rel. 16, a PDSCH may be scheduled in a DCI with a TCI field. The TCI state for the PDSCH is indicated by the TCI field. The TCI field in DCI format 1-1 is 3 bits long, and the TCI field in DCI format 1-2 is a maximum of 3 bits long.

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

[0029] Furthermore, if the TCI information element in the second DCI (higher layer parameter tci-PresentInDCI-1-2) for the CORESET that schedules 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 that CORESET.

[0030] Also, in Rel. 16, a PDSCH may be scheduled with a DCI that does not have a TCI field. The DCI format of the 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 a PDSCH is scheduled with a DCI that does not have a TCI field, if the time offset between the reception of the DL DCI (the DCI that schedules the PDSCH (the scheduling DCI)) and the corresponding PDSCH (the PDSCH scheduled by the 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 the CORESET (e.g., the scheduling DCI).

[0031] In RRC connected mode, when the TCI information elements in DCI (higher layer parameters tci-PresentInDCI and tci-PresentInDCI-1-2) are set to "enabled" and when the TCI information elements in DCI are not set, if the time offset between the reception of a DL DCI (a DCI that schedules a PDSCH) and the corresponding PDSCH (a 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 (of the specific 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 PUCCH spatial relations and for the activation / deactivation of SRS spatial relations. The PUSCH spatial relations follow the SRS spatial relations.

[0033] In Rel. 16, at least one of the MAC CE for PUCCH spatial-related activation / deactivation and the MAC CE for SRS spatial-related activation / deactivation 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), the 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), the 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 an active DL BWP on the CC (conditions apply), 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 the active DL BWP. If a CORESET is not configured in an active DL BWP on the CC, the default spatial relationship and default PL-RS may be the active TCI state with the lowest PDSCH ID in the active DL BWP.

[0036] In Rel.15, the spatial relationship of PUSCH scheduled by DCI format 0_0 follows the spatial relationship of the PUCCH resource with the lowest PUCCH resource ID among the active spatial relationships of PUCCH on the same CC. The network needs to update the PUCCH spatial relationships on all SCells even if no PUCCH is transmitted on the SCell.

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

[0039] In Rel. 16, if an RRC parameter (a parameter for enabling the default beam PL for PUCCH (enableDefaultBeamPL-ForPUCCH), a parameter for enabling the default beam PL for PUSCH (enableDefaultBeamPL-ForPUSCH0_0), or a parameter for enabling the 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 less than the threshold timeDurationForQCL, and at least one TCI state configured for the serving cell of the scheduled PDSCH includes "QCL Type D," and the UE is configured with the two default TCI enable information element (enableTwoDefaultTCIStates-r16), and at least one TCI codepoint (the codepoint in the TCI field in the DL DCI) indicates two TCI states, the UE assumes that the PDSCH or DM RS 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 two default TCI enable information element indicates that Rel. 16 operation of the two default TCI states for the PDSCH is enabled when at least one TCI codepoint maps to two TCI states.

[0042] As the default TCI state of PDSCH in Rel.15 / 16, the default TCI state for a single TRP, the default TCI state for multiple TRPs based on multiple DCIs, and the default TCI state for multiple TRPs based on a 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 a single TRP, the default TCI state for multi-TRP based on multi-DCI, and the default TCI state for multi-TRP based on a 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 (TRPs) (multi-TRPs (MTRPs)) 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 (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 the multi-TRP may transmit a different code word (CW) and a different layer. Non-Coherent Joint Transmission (NCJT) may be used as a form of multi-TRP transmission.

[0048] In the NCJT, for example, TRP#1 performs modulation mapping and layer mapping on 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 performs modulation mapping and layer mapping on a second codeword to transmit 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 at least one of the time and frequency domains, i.e., a first PDSCH from a first TRP and a second PDSCH from a second TRP may overlap in at least one of the time and frequency resources.

[0050] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (Quasi-Co-Location (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 also 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 also be scheduled using multiple DCIs (multiple DCI, multiple PDCCHs) (multi-master mode, multi-DCI based multi-TRP).

[0052] In URLLC for multiple TRPs, it is considered that PDSCH (transport block (TB) or codeword (CW)) repetition across multiple TRPs is supported. Repetition schemes (URLLC schemes, e.g., schemes 1, 2a, 2b, 3, and 4) across multiple TRPs in the frequency domain, layer (spatial) domain, or time domain are supported. In scheme 1, multiple PDSCHs from multiple TRPs are space division multiplexed (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency division multiplexed (FDM). In scheme 2a, the redundancy version (RV) is the same for multiple TRPs. In scheme 2b, the RVs may be the same or different for multiple TRPs. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexed (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted 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] To support intra-cell (having the same cell ID) and inter-cell (having different cell IDs) multi-TRP transmission 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 transmission. In this case, the TRP may be replaced with a CORESET pool index. [Condition 1] A CORESET pool index of 1 is set. [Condition 2] Two different values ​​of the CORESET pool index (for example, 0 and 1) are set.

[0056] If the following condition is met, the UE may determine that the state is multi-TRP based on a single DCI, in which case the two TRPs may be interpreted as two TCI states indicated by the MAC CE / DCI. [conditions] "Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE" is used to indicate one or two TCI states for one codepoint of 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 multi-TRP PDCCH based on 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] [Options 1-2] Two sets of PDCCH candidates (within a given search space (SS) set) are associated with two TCI states of CORESET, respectively, where the same CORESET, the same SS set, and PDCCH repetitions in 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, two PDCCH candidates in two SS sets for PDCCH repetition are supported, and it is considered that the two SS sets are explicitly linked.

[0065] (SFN PDCCH) For PDCCH / CORESET specified in Rel. 15, one TCI state without CORESETPoolIndex (which may also be called TRP information (TRP Info)) is set to one CORESET.

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

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

[0068] In the case where multiple antennas (small antennas, transmitting / receiving points) with 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 improving the operation and reliability of HST (high speed train).

[0069] Furthermore, in repeated transmission of PDCCH (which may simply be called "repetition"), two PDCCH candidates in two search space sets are linked, and each search space set is associated with a corresponding CORESET (Enhancement 2). The two search space sets may be associated with the same or different CORESETs. 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 in HST (high-speed train) tunnels is difficult. Large antennas transmit both inside and outside the tunnel. For example, the transmit 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 transmit 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 the terminal transmits and receives 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 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) will be used to communicate with a terminal (hereinafter also referred to as UE) included in a moving object (HST (high speed train)) such as a fast-moving train. Existing systems (e.g., Rel. 15) support transmitting a unidirectional beam from the RRH to communicate with a moving object (see Figure 1A).

[0073] FIG. 1A shows a case where RRHs are installed along the movement path (or movement direction, traveling direction, or travel path) of a moving object, and a beam is formed from each RRH in the traveling direction of the moving object. An RRH that forms a beam in one direction may be called a unidirectional RRH. In the example shown 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 expected that multiple beams (e.g., two or more) will be transmitted from the RRH. For example, it is expected that beams will be formed in both the direction of travel of the moving object and the opposite direction (see Figure 1B).

[0076] 1B shows a case where RRHs are installed along the movement path of a mobile object, and beams are formed from each RRH in both the direction of travel of the mobile object and the direction opposite to the direction of travel. An RRH that forms beams in multiple directions (for example, two directions) may be called a bidirectional RRH.

[0077] In this HST, the UE communicates in the same way as with a single TRP. In base station implementations, multiple TRPs (with the same cell ID) can transmit.

[0078] In the example of Figure 1B, when two remote radio heads (RRH#1 and RRH#2) use SFN, the mobile station switches from a signal that has undergone a negative Doppler shift to a signal that has undergone 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 a unidirectional remote radio head.

[0079] In the present disclosure, a positive Doppler shift may be interpreted as information regarding 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 regarding 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 commonly transmitted (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] Rel.16 specifies RRC parameters for distinguishing between transmissions using a single TRP and transmissions using 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 SFN based on the RRC parameters. On the other hand, the UE may perform transmission and reception using 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 PDSCH since the UE receives DL channels / signals from each TRP using TRS from each TRP.

[0086] In scheme 2 of FIG. 2C, a TRS and a 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 higher 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 elements / MAC CE).

[0088] The UE may switch between Scheme 1 / Scheme 2 / NW pre-compensation schemes 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 (TRP#0, #2, ...) transmitting DL signals in the direction opposite to the HST transmit the first TRS (TRS arriving before the HST) in the same time and frequency resource (SFN). The TRPs (TRP#1, #3, ...) transmitting DL signals in the direction of travel of the HST transmit the second TRS (TRS arriving after the HST) in the same time and frequency resource (SFN). The first TRS and 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 beam of the first TRS and the beam of the second TRS are considered to be equal (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 (BBUs) #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 (pre-correction) scheme (pre-Doppler compensation scheme, Doppler pre-compensation scheme, network (NW) pre-compensation scheme (NW pre-compensation scheme, HST NW pre-compensation scheme), TRP pre-compensation scheme, TRP-based pre-compensation scheme) is being considered for a base station to use when transmitting a downlink (DL) signal / channel from a TRP to a UE in an HST. The TRP performs Doppler compensation in advance when transmitting a DL signal / channel to a UE, thereby reducing 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 considered that the TRS from each TRP is transmitted without Doppler pre-compensation, and the PDSCH from each TRP is transmitted after 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 FIG. 4C, there may be two TCI states for the PDSCH since the UE receives DL channels / signals from each TRP using the 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 (code point of the TCI field, DCI code point) using the RRC information element / MAC CE (e.g., Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) / DCI (TCI field). When one TCI state is configured / indicated, the UE may determine to receive a PDSCH with single TRP. When two TCI states are configured / indicated, the UE may determine to receive a PDSCH with SFN using multi-TRP.

[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 by RRC with up to two applicable CC lists (e.g., applicable-CC-list). 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] Activation of TCI states on PDCCH The 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 states for PDSCH The MAC CE activates the TCI states on all BWP / CCs in the applicable CC list.

[0104] A-SRS / SP-SRS Spatial Relationship Activation The MAC CE activates 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 the CORESET or PDSCH of each CC. When one TCI state of CC #0 is activated by the MAC CE, the corresponding TCI states are 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 procedure A. [Step A] The UE receives activation commands to map up to eight TCI states to codepoints in the DCI field (TCI field) within one CC / DL BWP or within one set of CC / BWPs. If one set of TCI state IDs is activated for one set of CC / DL BWPs, then the applicable list of CCs is determined by the CC indicated in the activation command, and the same set of TCI states applies to all DL BWPs within the indicated CC. A set of TCI state IDs can be activated for one set of CC / DL BWPs only if the UE is not provided with multiple different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and at least one TCI codepoint that maps to two TCI states.

[0108] For PDCCH, the UE may follow procedure B. [Step 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 applies antenna port quasi co-location (QCL) provided by TCI states with the same activated TCI state ID value to the 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 different values ​​of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet) and 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. [Step C] For one set of CCs / BWPs, when the spatial relationship information (spatialRelationInfo) for the SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) is activated / updated by the MAC CE, then the applicable list of the CC is indicated by the simultaneous spatial update list (higher layer parameter simultaneousSpatial-UpdateList-r16 or simultaneousSpatial-UpdateListSecond-r16), and the spatial relationship information is applied to the 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 CC / BWP is activated / updated by the MAC CE only if the UE is not provided with multiple different values ​​of the CORESET pool index (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 the 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 the MAC CE. simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16 do not contain 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 codepoint 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 may apply a common beam for UL to all UL channels and a common beam for DL ​​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 direction). 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 (joint common TCI pool, joint TCI pool, set) for both UL and DL. X (>1) TCI states may be activated by the MAC CE. The UL / DL DCI may select one from 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 the 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) is stated, this 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, or Y=X) are written, this may mean that X UL TCI states (corresponding to X TRPs) and Y DL TCI states (corresponding to Y TRPs) are notified / configured / instructed to the UE. The UL TCI state and the DL TCI state may mean a TCI state common to UL and DL (i.e., a joint TCI state), or may mean a TCI state for each of 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 / instructed to the UE (joint TCI state for a single TRP).

[0123] Also, for example, when N=1 and M=1, it 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, this may mean that the UE is notified / configured / instructed to have multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs (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 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 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 case where the values ​​of N and M are 1 or 2 has been described, but the values ​​of N and M may be 3 or more, 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, one point may be one TCI state that applies to both the UL and DL, or two TCI states that apply to the 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 simply 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 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 be applied 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 be applied to one or more (or all) UL channels / RSs. The UL channels may be PUSCH / SRS / PUCCH. In this way, different DCIs may indicate the UL TCI and the DL DCI separately.

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

[0137] The common TCI framework may have separate TCI states for DL ​​and UL.

[0138] (MAC CE) In Rel. 16, MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) is used for activating / deactivating the TCI states of a UE-specific PDSCH (see FIG. 7).

[0139] The MAC CE is identified by a MAC subheader that has a Logical Channel ID (LCID).

[0140] The MAC CE may be used in an environment using a single TRP or multiple TRPs based on multiple DCIs.

[0141] 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.

[0142] 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 the field Ti (the code point of the DCI TCI) is specific to the ControlResourceSetId set by the CORESET Pool ID.

[0143] Furthermore, in Rel. 16, MAC CE (Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) is used for activation / deactivation of the TCI states of a UE-specific PDSCH (see FIG. 8).

[0144] The MAC CE is identified in the MAC PDU subheader with the eLCID.

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

[0146] 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).

[0147] "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.

[0148] Furthermore, 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).

[0149] The MAC CE is identified by a MAC subheader with an LCID.

[0150] The MAC CE may include a Serving Cell ID field, a field indicating the CORESET (CORESET ID) for which the TCI state is to be indicated, and a field (TCI state ID) for indicating the TCI state applicable to the CORESET identified by the CORESET ID.

[0151] (analysis) In the unified TCI state framework from Rel. 17 onwards, joint DL / UL TCI states and DL TCI states (DL separate TCI states) may be applied in reception of the following signals / channels: Reception on UE-specific (UE dedicated) PDSCH. Reception of a subset / full of a UE-dedicated CORESET. Reception on non-UE-dedicated CORESET and associated PDSCH. · Reception of aperiodic (AP) CSI-RS for channel measurement information (CSI). · Receiving AP-CSI-RS for beam management.

[0152] In the unified TCI state framework from Rel. 17 onwards, the joint DL / UL TCI state and the UL TCI state (UL separate TCI state) may be applied in the transmission of the following signals / channels by the UE: Dynamic grant (DCI) / configured grant based PUSCH. A subset / all of dedicated (UE) PUCCH resources. A subset / all of the SRS resources in the resource set configured for at least one of antenna switching, codebook-based UL transmission, and non-codebook-based UL transmission. ·AP SRS for beam management. Non-UE-dedicated PUCCH. Non-UE-dedicated PUSCH.

[0153] In this way, when the set / activated / indicated TCI state is applied to multiple types of signals (channels / RS), there are cases where the method for setting / indicating the TCI state is unclear. If the method for setting / indicating the TCI state is unclear, it may lead to a decrease in communication quality, a decrease in throughput, etc.

[0154] Therefore, the present inventors have conceived a method for appropriately setting / indicating / applying a TCI state even when the TCI state is applied to multiple types of signals / channels.

[0155] 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.

[0156] 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.

[0157] In the present disclosure, the terms configure, activate, update, indicate, enable, specify, and select may be read interchangeably.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] In this disclosure, the terms 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 for QCL type D in TCI state / QCL assumption, RS for QCL type A in 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 interchangeable. In this disclosure, the terms QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS, and SRS may be interchangeable.

[0162] In the present disclosure, the terms panel, UE panel, panel group, 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 RESOLUTION SET (CORESET)), physical downlink shared channel (PDSCH), codeword (CW), transport block (TB), reference signal (Reference Signal (RS)), base station, antenna port of a certain signal (e.g., demodulation reference signal (DMRS) port), DMRS, antenna port group of a certain signal (e.g., DMRS port group), group for multiplexing (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group), Physical Uplink Control The terms PUCCH group, PUCCH resource group, resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, CORESET subset, 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, redundancy version (RV), and layer (multi-input multi-output (MIMO) layer, transmission layer, spatial layer) may be read as interchangeable.In addition, a panel identifier (ID) and a panel may be interchangeable. In the present disclosure, a TRP ID and a TRP may be interchangeable.

[0163] 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.

[0164] Furthermore, a panel identifier (ID) and a panel may be interchangeable. That is, a TRP ID and a TRP, a CORESET group ID and a CORESET group, etc. may be interchangeable.

[0165] 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 a TCI field may be read interchangeably.

[0166] In this disclosure, a single PDCCH (DCI) may be assumed to be supported when multiple TRPs utilize an ideal backhaul. Multiple PDCCHs (DCIs) may be assumed to be supported when multiple TRPs utilize a non-ideal backhaul.

[0167] The ideal backhaul may be called DMRS port group type 1, reference signal associated 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 associated group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0168] 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 TRPs," "multiple TRP system," "multiple TRP transmission," and "multiple PDSCH" may be interchangeable. In this disclosure, the terms "single DCI," "single PDCCH," "multiple TRPs based on a single DCI," and "activating two TCI states on at least one TCI codepoint" may be interchangeable.

[0169] In the present disclosure, single TRP, channel using single TRP, channel using one TCI state / spatial relationship, no multi-TRP enabled by RRC / DCI, no multiple TCI states / spatial relationships enabled by RRC / DCI, no CORESETPoolIndex value of 1 set for any CORESET, and no codepoint in the TCI field mapped to two TCI states may be read interchangeably.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] The QCL of the present disclosure may be interchangeably read as QCL Type D.

[0175] In the present disclosure, expressions such as "TCI state A is QCL type D, which is the same as TCI state B," "TCI state A is the same as TCI state B," and "TCI state A is QCL type D with TCI state B" may be read interchangeably.

[0176] 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.

[0177] 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.

[0178] In the present disclosure, a PDSCH / PDCCH using a single TRP may be interpreted as a PDSCH / PDCCH based on a single TRP, a single TRP PDSCH / PDCCH, etc. Also, in the present disclosure, a PDSCH / PDCCH using SFN may be interpreted as a PDSCH / PDCCH using SFN in multi-hop transmission, a PDSCH / PDCCH based on SFN, or an SFN PDSCH / PDCCH.

[0179] In the present disclosure, receiving DL signals (PDSCH / PDCCH) using SFN may mean receiving the same data (PDSCH) / control information (PDCCH) from multiple transmission / reception points using the same time / frequency resources, and / or receiving DL signals using SFN may mean receiving the same data / control information using the same time / frequency resources and / or multiple TCI states / space-domain filters / beams / QCLs.

[0180] In the present disclosure, at least one of HST-SFN scheme, SFN scheme after Rel. 17, new SFN scheme, new HST-SFN scheme, HST-SFN scenario after Rel. 17, 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 may be read interchangeably.

[0181] 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.

[0182] 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 single PDCCH / SS / CORESET may be interchangeable.

[0183] In the present disclosure, two linked CORESETs for PDCCH repetition, and two CORESETs respectively associated with two linked SS sets may be read interchangeably.

[0184] 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.

[0185] 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 interchangeably.

[0186] In the present disclosure, the terms PDCCH reception method, PDCCH repetition, SFN-PDCCH repetition, HST-SFN, and HST-SFN scheme may be read interchangeably.

[0187] In the present disclosure, the PDSCH reception method, the single DCI-based multi-TRP, and the HST-SFN scheme may be read interchangeably.

[0188] In the present disclosure, the single DCI-based multi-TRP repetition may be an NCJT for an enhanced mobile broadband (eMBB) service (low priority, priority 0) or a repetition of a URLLC service (high priority, priority 1) for an ultra-reliable and low latency communications service.

[0189] In the present disclosure, small, few, short, and low may be read as interchangeable. Also, in the present disclosure, ignore, drop, etc. may be read as interchangeable.

[0190] In the present disclosure, "highest (maximum)" and "lowest (minimum)" may be read interchangeably. Also, in the present disclosure, "maximum" may be read interchangeably as "the nth (n is any natural number)" largest, larger, higher, etc. Also, in the present disclosure, "minimum" may be read interchangeably as "the nth (n is any natural number) smallest," smaller, lower, etc. Also, in the present disclosure, "early (in time)," "late (in time)," and "latest" may be read interchangeably. Also, in the present disclosure, "start" and "end" may be read interchangeably.

[0191] In the present disclosure, repetition, repeated transmission, and repeated reception may be read interchangeably.

[0192] 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.

[0193] (Wireless communication method) One or more (N) UL TCI states and one or more (M) DL TCI states may be indicated to the UE.

[0194] For example, the UE may be indicated one or more TCI states using the DCI.

[0195] The format of the DCI indicating the TCI state may be a DCI format including a TCI field (for example, DCI format 1_1 / 1_2).

[0196] For example, the DCI may include multiple TCI fields for indicating multiple TCI states, and the UE may determine one or more (N) UL TCI states and one or more (M) DL TCI states based on the multiple TCI fields.

[0197] 10A is a diagram showing an example of a TCI field included in a DCI. In FIG. 10A, the DCI includes multiple TCI fields indicating TCI states (TCI field #1 and TCI field #2 in the example of FIG. 10A). The UE may determine one or more UL TCI states and one or more DL TCI states based on the TCI fields.

[0198] Also, for example, the DCI may include one TCI field for indicating multiple TCI states, and the UE may determine one or more (N) UL TCI states and one or more (M) DL TCI states based on the multiple TCI fields.

[0199] 10B is a diagram illustrating another example of a TCI field included in a DCI. A correspondence relationship between code points in the TCI field and multiple TCI states, as illustrated in FIG. 10B, may be configured in advance in the UE. The UE may determine one or more UL TCI states and one or more DL TCI states based on (the code points of) the TCI field included in the DCI. For example, when the TCI field included in the DCI indicates "100," the UE determines the first joint TCI state as TCI state #1 and the second joint TCI state as TCI state #0.

[0200] In the example shown in Figure 10B, the first joint TCI state and the second joint TCI state are described as the TCI states corresponding to the code points in the TCI field, but the TCI state corresponding to the TCI code points may also be a separate TCI state.

[0201] Also, for example, the DCI may include multiple TCI fields for indicating multiple TCI states, and the UE may determine one or more (N) UL TCI states and one or more (M) DL TCI states based on the multiple TCI fields.

[0202] In addition, the format of the DCI indicating the TCI state may be a first DCI format (e.g., a DCI format for scheduling a PDSCH (e.g., DCI format 1_1 / 1_2)) and a second DCI format (e.g., a DCI format for scheduling a PUSCH (e.g., DCI format 0_1 / 0_2)).

[0203] The UE may be instructed to one set of TCI states (joint TCI states / separate (DL / UL) TCI states) based on the first DCI format, and the UE may be instructed to another set of TCI states based on the second DCI format.

[0204] 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 (defined in Rel. 16) is applied.

[0205] In each embodiment of the present disclosure, a PDSCH for multiple TRPs may be interchangeably read as a PDSCH to which TDM / FDM / SDM for multiple TRPs based on a single DCI (defined in Rel. 16) is applied.

[0206] 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).

[0207] 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.

[0208] In each embodiment of the present disclosure, configuring the use of multiple TRPs based on multiple DCIs may mean configuring a CORESET pool index of 1. Also, configuring the use of multiple TRPs based on multiple DCIs may mean configuring a CORESET pool index of two different values ​​(e.g., 0 and 1).

[0209] 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.

[0210] 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.

[0211] The following embodiments of the present disclosure may be applied to transmission and reception of any channel / signal to which the unified TCI state framework defined in the above-mentioned Rel. 17 and later is applicable.

[0212] In the present disclosure, applying a TCI state to each channel / signal / resource may mean applying a TCI state to transmission and reception of each channel / signal / resource.

[0213] First Embodiment [Analysis 1] In Rel.17 and later, there are cases where the setting / instruction / application of joint / separate TCI states has not been sufficiently considered. For example, there has been insufficient consideration given to the setting / instruction / application of the joint DL / UL TCI state of M=2, N=1, the joint DL / UL TCI state of M=1, N=2, the separate DL / UL TCI state of M=2, N=1, the separate DL / UL TCI state of M=1, N=2, the joint TCI state of M=N=1, and the joint TCI state of M=N=2.

[0214] If this consideration is not sufficient, the TCI state cannot be set / instructed appropriately, which may result in a decrease in communication quality and throughput.

[0215] Below, we will explain how to solve the problem in Analysis 1.

[0216] In the present disclosure, the maximum number of TCI states that can be specified / set is described as two, but the maximum number of TCI states may be a number greater than two.

[0217] <<Embodiment 1-1>> In this embodiment, a joint TCI state of M=2 and N=1 may be indicated to the UE.

[0218] The UE may be indicated two common TCI states. The UE may be indicated two joint TCI states.

[0219] The UE may be indicated one or more joint DL / UL TCI states and may activate one or two TCI states corresponding to the codepoints of the one or two TCI states using the MAC CE.

[0220] The UE may apply the two indicated TCI states to the reception of DL channels / signals.

[0221] The UE may determine one of the two indicated TCI states based on a specific condition and apply the determined TCI state to the transmission of the UL channel / signal.

[0222] 11 is a diagram illustrating an example of determining a TCI state according to embodiment 1-1. In the example illustrated in FIG. 11, a joint TCI state pool is configured by RRC signaling, and some joint TCI states are activated by a MAC CE. Then, two TCI states are indicated from the activated TCI states by a DCI.

[0223] In the example shown in FIG. 11, the UE applies both of the two TCI states to receiving DL channels / signals, and applies one (specific) of the two TCI states to transmitting UL channels / signals.

[0224] For example, the UE may determine one specific TCI state from the two indicated TCI states. The specific TCI state may be, for example, a first (or second) TCI state corresponding to a TCI code point. The first (or second) TCI state corresponding to the TCI code point may be notified to the UE using higher layer signaling (e.g., RRC signaling / MAC CE). Furthermore, the specific TCI state may be a TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID).

[0225] Furthermore, the UE may determine one of the two indicated TCI states based on higher layer signaling (higher layer parameters). For example, the UE may indicate the first (or second) TCI state of the first and second TCI states corresponding to a TCI codepoint using higher layer signaling. Similarly, the UE may indicate the TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID) using higher layer signaling.

[0226] Furthermore, the UE may determine one of the two indicated TCI states based on the DCI. The DCI may include a field indicating the UL TCI state to be used. For example, as shown in Figure 12, the DCI may include an indication bit (field) indicating the first TCI state or the second TCI state, corresponding to the code point of the TCI field.

[0227] The DL channel / signal may be transmitted using at least one of a multiple TRP transmission scheme based on single / multiple DCI and an SFN transmission scheme.

[0228] One joint DL / UL TCI state may correspond to one TRP.

[0229] The application of DL channels / signals (e.g., PDCCH / PDSCH / CSI-RS) for multiple TRPs may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0230] The UL channel / signal may be transmitted using a transmission scheme that uses a single TRP / single panel.

[0231] The application of UL channels / signals (e.g., PUCCH / PUSCH / SRS) using a single TRP / single panel may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0232] In this embodiment, if two common TCI states are indicated to the UE, the UE may apply the two TCI states to UL transmission.

[0233] Embodiment 1-2 In this embodiment, a joint TCI state of M=1, N=2 may be indicated to the UE.

[0234] The UE may be indicated two common TCI states. The UE may be indicated two joint TCI states.

[0235] The UE may be indicated one or more joint DL / UL TCI states and may activate one or two TCI states corresponding to the codepoints of the one or two TCI states using the MAC CE.

[0236] The UE may apply the two indicated TCI states to the transmission of the UL channel / signal.

[0237] The UE may determine one of the two indicated TCI states based on a specific condition and apply the determined TCI state to receive the DL channel / signal.

[0238] 13 is a diagram illustrating an example of determining a TCI state according to embodiment 1-2. In the example illustrated in FIG. 13, a joint TCI state pool is configured by RRC signaling, and some joint TCI states are activated by the MAC CE. Then, two TCI states are indicated from the activated TCI states by DCI.

[0239] In the example shown in FIG. 13, the UE applies both of the two TCI states to receiving UL channels / signals, and applies one (specific) of the two TCI states to transmitting DL channels / signals.

[0240] For example, the UE may determine one specific TCI state from the two indicated TCI states. The specific TCI state may be, for example, a first (or second) TCI state corresponding to a TCI code point. The first (or second) TCI state corresponding to the TCI code point may be notified to the UE using higher layer signaling (e.g., RRC signaling / MAC CE). Furthermore, the specific TCI state may be a TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID).

[0241] Furthermore, the UE may determine one of the two indicated TCI states based on higher layer signaling (higher layer parameters). For example, the UE may indicate the first (or second) TCI state of the first and second TCI states corresponding to a TCI codepoint using higher layer signaling. Similarly, the UE may indicate the TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID) using higher layer signaling.

[0242] The UE may also determine one of the two indicated TCI states based on the DCI, which may include a field indicating the UL TCI state to be used.

[0243] The UL channel / signal may be transmitted using at least one of a multiple TRP transmission scheme based on single / multiple DCI and an SFN transmission scheme.

[0244] One joint DL / UL TCI state may correspond to one TRP.

[0245] The application of UL channels / signals (e.g., PUCCH / PUSCH / SRS) for multiple TRPs may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0246] The DL channel / signal may be transmitted using a transmission scheme that uses a single TRP / single panel.

[0247] The application of DL channels / signals (e.g., PDCCH / PDSCH / CSI-RS) using a single TRP / single panel may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0248] In this embodiment, if two common TCI states are configured for the UE, the UE may apply the two TCI states for DL ​​reception.

[0249] Embodiments 1-3 In this embodiment, a separate TCI state of M=2, N=1 may be indicated to the UE.

[0250] Two (separate) DL TCI states and one (separate) UL TCI state may be indicated to the UE.

[0251] If the UE receives a MAC CE indicating TCI codepoints corresponding to the two DL TCI states, the UE may activate / apply the DL TCI state. In this case, if the MAC CE does not include a TCI codepoint corresponding to the UL TCI state, the UE may maintain / save the current UL TCI state.

[0252] If the UE receives a MAC CE indicating a TCI codepoint corresponding to the UL TCI state, the UE may activate / apply the UL TCI state, and if the MAC CE does not include a TCI codepoint corresponding to the DL TCI state, the UE may maintain / save the current DL TCI state.

[0253] When a MAC CE is received indicating TCI codepoints corresponding to the two DL TCI states and a TCI codepoint corresponding to the one UL TCI state, the UE may activate / apply the DL TCI state and the UL TCI state.

[0254] Fig. 14 is a diagram illustrating an example of determining TCI states according to embodiments 1 to 3. In the example illustrated in Fig. 14, a joint TCI state pool is configured by RRC signaling, and some joint TCI states are activated by the MAC CE. Then, two TCI states for DL ​​and one TCI state for UL are indicated from the activated TCI states by DCI.

[0255] In the example shown in FIG. 14, the UE applies two TCI states, both for receiving DL channels / signals, and one TCI state for transmitting UL channels / signals.

[0256] For example, the UE may determine one specific TCI state from the two indicated TCI states. The specific TCI state may be, for example, a first (or second) TCI state corresponding to a TCI code point. The first (or second) TCI state corresponding to the TCI code point may be notified to the UE using higher layer signaling (e.g., RRC signaling / MAC CE). Furthermore, the specific TCI state may be a TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID).

[0257] Furthermore, the UE may determine one of the two indicated TCI states based on higher layer signaling (higher layer parameters). For example, the UE may indicate the first (or second) TCI state of the first and second TCI states corresponding to a TCI codepoint using higher layer signaling. Similarly, the UE may indicate the TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID) using higher layer signaling.

[0258] The UE may also determine one of the two indicated TCI states based on the DCI, which may include a field indicating the UL TCI state to be used.

[0259] The DL channel / signal may be transmitted using at least one of a multiple TRP transmission scheme based on single / multiple DCI and an SFN transmission scheme.

[0260] One DL TCI state may correspond to one TRP.

[0261] The application of DL channels / signals (e.g., PDCCH / PDSCH / CSI-RS) for multiple TRPs may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0262] The UL channel / signal may be transmitted using a transmission scheme that uses a single TRP / single panel.

[0263] The application of UL channels / signals (e.g., PUCCH / PUSCH / SRS) using a single TRP / single panel may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0264] In this embodiment, if two DL TCI states are indicated to the UE, the UE may activate / apply the two DL TCI states as UL TCI states for UL transmission.

[0265] Embodiments 1-4 In this embodiment, a separate TCI state of M=1, N=2 may be indicated to the UE.

[0266] A UE may be indicated one (separate) DL TCI state and two (separate) UL TCI states.

[0267] If the UE receives a MAC CE indicating a TCI codepoint corresponding to the DL TCI state, the UE may activate / apply the DL TCI state, and if the MAC CE does not include a TCI codepoint corresponding to the UL TCI state, the UE may maintain / save the current UL TCI state.

[0268] If the UE receives a MAC CE indicating TCI codepoints corresponding to the two UL TCI states, the UE may activate / apply the UL TCI state, and if the MAC CE does not include a TCI codepoint corresponding to the DL TCI state, the UE may maintain / save the current DL TCI state.

[0269] When a MAC CE is received indicating a TCI codepoint corresponding to the one DL TCI state and a TCI codepoint corresponding to the two UL TCI states, the UE may activate / apply the DL TCI state and the UL TCI state.

[0270] Fig. 15 is a diagram illustrating an example of determining a TCI state according to embodiments 1 to 4. In the example illustrated in Fig. 15, a joint TCI state pool is configured by RRC signaling, and some joint TCI states therein are activated by a MAC CE. Then, two TCI states for UL and one TCI state for UL are indicated from the activated TCI states by a DCI.

[0271] In the example shown in FIG. 15, the UE applies two TCI states, both for receiving UL channels / signals, and one TCI state for transmitting DL channels / signals.

[0272] For example, the UE may determine one specific TCI state from the two indicated TCI states. The specific TCI state may be, for example, a first (or second) TCI state corresponding to a TCI code point. The first (or second) TCI state corresponding to the TCI code point may be notified to the UE using higher layer signaling (e.g., RRC signaling / MAC CE). Furthermore, the specific TCI state may be a TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID).

[0273] Furthermore, the UE may determine one of the two indicated TCI states based on higher layer signaling (higher layer parameters). For example, the UE may indicate the first (or second) TCI state of the first and second TCI states corresponding to a TCI codepoint using higher layer signaling. Similarly, the UE may indicate the TCI state corresponding to a specific TCI state ID (e.g., a lower (or higher) TCI state ID) using higher layer signaling.

[0274] The UE may also determine one of the two indicated TCI states based on the DCI, which may include a field indicating the UL TCI state to be used.

[0275] The UL channel / signal may be transmitted using at least one of a multiple TRP transmission scheme based on single / multiple DCI and an SFN transmission scheme.

[0276] One UL TCI state may correspond to one TRP.

[0277] The application of UL channels / signals (e.g., PUCCH / PUSCH / SRS) for multiple TRPs may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0278] The UL channel / signal may be transmitted using a transmission scheme that uses a single TRP / single panel.

[0279] The application of DL channels / signals (e.g., PDCCH / PDSCH / CSI-RS) using a single TRP / single panel may be predefined in the specifications or may be configured / instructed to the UE using higher layer signaling (RRC signaling / MAC CE) / physical layer signaling (DCI).

[0280] In this embodiment, if two UL TCI states are indicated to the UE, the UE may activate / apply the two UL TCI states as DL TCI states for DL ​​reception.

[0281] As described above, according to the first embodiment, it is possible to appropriately set / instruct / apply joint / separate TCI states according to the number of DL / UL TCI states.

[0282] <Second embodiment> [Analysis 2] In Rel. 17 and later, it is being considered to set a joint DL / UL TCI state mode and a separate DL / UL TCI state mode in RRC signaling.

[0283] In Rel. 17 and later, there are cases where the switching between joint and separate TCI states has not been sufficiently considered. For example, the switching between joint and separate TCI states for each M and N has not been sufficiently considered.

[0284] If this consideration is not sufficient, the TCI state cannot be set / instructed appropriately, which may result in a decrease in communication quality and throughput.

[0285] Below, we will explain how to solve the problem in Analysis 2.

[0286] <<Embodiment 2-1>> A joint TCI state mode may be configured for the UE, which may be that the UE determines the DL / UL TCI state based on the joint TCI state.

[0287] The UE may switch between the case where M=N=1 and other cases (for example, at least one of the cases where M=1, N=2, M=2, N=1, and M=N=2) (embodiment 2-1-1).

[0288] The UE may perform this switching based on higher layer signaling (RRC signaling / RRC configuration).

[0289] For example, the RRC configuration may indicate that one or two TCI states are activated by a TCI codepoint (in the MAC CE) and / or that one or two TCI states are indicated by a DCI.

[0290] For example, if the RRC configuration specifies that one TCI state is activated / indicated, the UE may determine that M=N=1 joint TCI states are activated / indicated.

[0291] For example, if the RRC configuration specifies that two TCI states are activated / indicated, the UE may determine that a joint TCI state is activated / indicated in at least one of the following cases: when M=1, N=2; when M=2, N=1; and when M=N=2.

[0292] The UE may perform this switching based on the MAC CE / DCI, which may indicate one or two TCI states activated by a TCI codepoint (in the MAC CE) and / or one or two TCI states indicated by the DCI.

[0293] The UE may perform the switching based on at least one of the number of TCI states (which may be referred to as the first number) activated by the TCI codepoint (in the MAC CE) and the number of TCI states (which may be referred to as the second number) indicated by the DCI.

[0294] For example, if the first number / second number is 1, the UE may determine that a joint TCI state of M=N=1 is activated / indicated. Also, if the first number / second number is 2, the UE may determine that a joint TCI state of at least one of the following cases is activated / indicated: when M=1, N=2, when M=2, N=1, and when M=N=2.

[0295] Fig. 16 is a diagram showing an example of a switching method for the TCI state according to embodiment 2-1. In Fig. 16, one joint TCI state is indicated to the UE by code points "000" to "011" in the TCI field, and two joint TCI states are indicated by code points "100" to "111" in the TCI field. When one TCI state is indicated, the UE determines that it is a case of M=1, N=1, and when two TCI states are indicated, the UE determines that it is another case (for example, at least one of the cases of M=1, N=2, M=2, N=1, and M=N=2).

[0296] The UE may perform at least two switching cases: when M=1 and N=2, when M=2 and N=1, and when M=N=2 (embodiment 2-1-2).

[0297] The UE may perform this switching based on higher layer signaling (RRC signaling / RRC configuration / MAC CE) / DCI.

[0298] For example, in at least one of the following cases: when two TCI states are activated by a TCI codepoint (in a MAC CE) and when two TCI states are indicated by a DCI, the UE may determine that the RRC signaling / MAC CE / DCI indicates that two DL TCI states apply.

[0299] For example, in at least one of the cases where two TCI states are activated by a TCI codepoint (in the MAC CE) and where two TCI states are indicated by a DCI, the UE may determine that the RRC signaling / MAC CE / DCI indicates that two UL TCI states apply.

[0300] For example, in at least one of the cases where two TCI states are activated by a TCI codepoint (in the MAC CE) and where two TCI states are indicated by a DCI, the UE may determine that the RRC signaling / MAC CE / DCI indicates that two DL and UL TCI states apply.

[0301] <<Embodiment 2-2>> A separate TCI state mode may be configured for the UE, which may be that the UE determines the DL / UL TCI state based on the (separate) DL TCI state and the (separate) UL TCI state.

[0302] The UE may perform at least two switching cases: when M=1, N=1, when M=1, N=2, when M=2, N=1, and when M=2, N=2.

[0303] The UE may perform this switching based on higher layer signaling (RRC signaling / RRC configuration).

[0304] For example, the RRC configuration may indicate that one or two DL / UL TCI states are activated by a TCI codepoint (in the MAC CE) and / or that one or two DL / UL TCI states are indicated by a DCI.

[0305] For example, if the RRC configuration configures that one DL TCI state is activated / indicated and one UL TCI state is activated / indicated, the UE may determine that M=1, N=1 separate TCI states are activated / indicated.

[0306] For example, if the RRC configuration specifies that one DL TCI state is activated / indicated and two UL TCI states are activated / indicated, the UE may determine that separate TCI states with M=1 and N=2 are activated / indicated.

[0307] For example, if the RRC configuration specifies that two DL TCI states are activated / indicated and one UL TCI state is activated / indicated, the UE may determine that M=2, N=1 separate TCI states are activated / indicated.

[0308] For example, if the RRC configuration specifies that two DL TCI states are activated / indicated and two UL TCI states are activated / indicated, the UE may determine that M=2, N=2 separate TCI states are activated / indicated.

[0309] The UE may perform this switching based on the MAC CE / DCI. One or two separate DL TCI states may be activated by a TCI codepoint (in the MAC CE). One or two separate UL TCI states may be activated by a TCI codepoint (in the MAC CE).

[0310] The MAC CE may include code points corresponding to DL TCI states and code points corresponding to UL TCI states. The MAC CE may include only code points corresponding to DL TCI states. The MAC CE may include only code points corresponding to UL TCI states.

[0311] The UE may perform the switching based on at least one of the number of DL / UL TCI states (which may be referred to as the first number) activated by the TCI codepoint (in the MAC CE) and the number of DL / UL TCI states (which may be referred to as the second number) indicated by the DCI.

[0312] For example, if the first number / second number of DL TCI states and the first number / second number of UL TCI states are 1, the UE may determine that a separate TCI state with M=1 and N=1 is activated / indicated.

[0313] For example, if the first number / second number of DL TCI states is 1 and the first number / second number of UL TCI states is 2, the UE may determine that separate TCI states with M=1 and N=2 are activated / indicated.

[0314] For example, if the first number / second number of DL TCI states is 2 and the first number / second number of UL TCI states is 1, the UE may determine that a separate TCI state with M=2 and N=1 is activated / indicated.

[0315] For example, if the first number / second number of DL TCI states is 2 and the first number / second number of UL TCI states is 2, the UE may determine that M=2, N=2 separate TCI states are activated / indicated.

[0316] According to the second embodiment, the TCI state mode can be switched appropriately according to the numbers M and N.

[0317] [Analysis 3] In Rel. 17 and later, in the joint / separate TCI state framework, at least one of two joint DL / UL TCI states, two DL TCI states, and two UL TCI states is indicated to the UE.

[0318] At this time, there is insufficient consideration as to how to apply one or two TCI states to DL / UL channels.

[0319] For example, there is insufficient consideration as to how to apply one or two TCI states to PDSCH / PUSCH / PDCCH / PUCCH.

[0320] Furthermore, for example, when two TCI states are applied, there has been insufficient consideration as to how to apply the two TCI states to PDSCH / PUSCH / PDCCH / PUCCH for multiple TRPs.

[0321] Also, for example, when one TCI state is applied, there is insufficient consideration as to how to apply two TCI states to the PDSCH / PUSCH / PDCCH / PUCCH for a single TRP.

[0322] If these considerations are not sufficient, the TCI state cannot be applied appropriately to each channel, which may result in a deterioration in communication quality and throughput.

[0323] Hereinafter, methods for solving the problems in analysis 3 will be described in the third to seventh embodiments.

[0324] <Third embodiment> Two joint TCI states / separate DL TCI states may be indicated to the UE.

[0325] The UE may determine whether one TCI state or two TCI states are to be applied to reception of a DL channel (e.g., a PDSCH) among the two indicated TCI states. The UE may determine which one or more TCI states are to be applied to reception of a DL channel (e.g., a PDSCH) among the two indicated TCI states.

[0326] For determining the TCI state, the UE may follow at least one of the following embodiments 3-1 to 3-7.

[0327] Note that the method of determining the TCI state to be applied to the DL channel (for example, PDSCH) from the indicated TCI state may be the method described in the first embodiment.

[0328] <<Embodiment 3-1>> The joint TCI state / separate DL TCI state may not be applicable to at least one of the PDSCH, the PDSCH for multiple TRPs, and the SFN PDSCH.

[0329] The UE may assume that the joint TCI state / separate DL TCI state does not apply to at least one of the PDSCH, the PDSCH for multiple TRPs, and the SFN PDSCH.

[0330] <<Embodiment 3-2>> As a default, two TCI states may apply to the reception of the PDSCH.

[0331] The UE may apply two TCI states for receiving the PDSCH.

[0332] The UE may assume that two TCI states are indicated for reception of the PDSCH.

[0333] <<Embodiment 3-3>> As a default, one TCI state may be applied to the reception of the PDSCH.

[0334] The UE may apply one TCI state for receiving the PDSCH.

[0335] The UE may assume that one TCI state is indicated for reception of the PDSCH.

[0336] Embodiments 3-4 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0337] If the higher layer signaling configures / indicates two TCI states for a PDSCH, the UE may apply the two TCI states to at least one of multiple (e.g., all) UE-specific PDSCHs and multiple (e.g., all) non-UE-specific (UE-common) PDSCHs.

[0338] The setting / instruction by the higher layer signaling may set / instruct at least one of a PDSCH scheme to which SDM / FDM / TDM for multiple TRPs based on a single DCI is applied and an SFN PDSCH scheme.

[0339] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0340] The setting / instruction by the higher layer signaling may be set / instructed commonly for a plurality of channels / signals (for example, PDSCH / PDCCH / PUSCH / PUCCH / CSI-RS / SRS).

[0341] Embodiments 3-5 Whether one or both of the two indicated TCI states apply may be indicated within a particular DCI.

[0342] The specific DCI may be DCI that schedules the PDSCH (scheduling DCI).

[0343] The particular DCI may also be a DCI that activates a semi-persistent scheduling (SPS) PDSCH.

[0344] A specific field in a specific DCI may indicate whether one or both of the two indicated TCI states are applicable. In this case, a DCI field similar to the single TRP / multiple TRP switching field may be used, which may be similar (or the same) as the field for dynamic single / multiple TRP switching (switching field) in the case of repeated transmission of a PUSCH with multiple TRPs (defined in Rel. 17 and later).

[0345] Fig. 17 is a diagram illustrating an example of a switching field according to embodiments 3 to 5. A field indicating the single TRP mode or the multiple TRP mode and the TCI state to be applied as illustrated in Fig. 17 may be included in the DCI (for example, DCI format 1_1 / 1_2).

[0346] In the example shown in Figure 17, the UE determines the single TRP mode or the multi-TRP mode and the TCI state to apply based on the indicated code points. "The order of TRP#1, TRP#2" in Figure 17 may mean that the first repetition of the repeated PDSCH transmission corresponds to the first TCI state / TCI state with a lower TCI state ID, and the second repetition corresponds to the second TCI state / TCI state with a higher TCI state ID. Also, "the order of TRP#2, TRP#1" may mean that the first repetition of the repeated PDSCH transmission corresponds to the second TCI state / TCI state with a higher TCI state ID, and the second repetition corresponds to the first TCI state / TCI state with a lower TCI state ID.

[0347] The number of bits and the contents of the fields shown in Figure 17 are merely examples and are not limited to these. For example, there may be only one code point indicating the single / multiple TRP mode. The contents of the field indicating the order of TRPs may not be included.

[0348] Embodiments 3-6 The UE may be configured / instructed to apply one or two TCI states to the PDSCH using the number of repetitions of the PDSCH.

[0349] The UE may determine to apply one or two TCI states to the PDSCH based on the number of repetitions of the PDSCH.

[0350] For example, when a PDSCH with a repetition count of 1 is configured, the UE may determine to apply one TCI state to the PDSCH.

[0351] For example, if a PDSCH with a repetition number greater than 1 is configured, the UE may determine to apply two TCI states to the PDSCH.

[0352] Embodiments 3-7 The UE may determine whether to apply the above embodiments 3-1 to 3-6 based on the transmission scheme of the PDSCH.

[0353] Whether any of the above-described embodiments 3-1 to 3-6 is applied for each PDSCH transmission scheme may be specified in advance in a specification. Whether any of the above-described embodiments 3-1 to 3-6 is applied for each PDSCH transmission scheme may be configured in a UE using higher layer signaling.

[0354] 18A to 18D are diagrams showing an example of application of the TCI state in embodiment 3. Figures 18A, 18B, 18C, and 18D correspond to the above embodiments 3-2, 3-3, 3-4, and 3-5, respectively.

[0355] In the example shown in Figure 18A, the UE applies two TCI states to the reception of the PDSCH, and in the example shown in Figure 18B, the UE applies one TCI state to the reception of the PDSCH.

[0356] In the example shown in Figure 18C, the UE receives higher layer signaling (RRC signaling / MAC CE) that configures / activates the application of one or two TCI states. In the example shown in Figure 18C, the higher layer signaling configures the application of two TCI states. Therefore, the UE applies two TCI states for receiving PDSCH.

[0357] In the example shown in Figure 18D, the number of TCI states to apply to the PDSCH is determined based on the DCI that schedules the PDSCH. In the example shown in Figure 18D, DCIs #1 and #3 indicate the application of two TCI states, and DCI #2 indicates the application of one TCI state.

[0358] <PDSCH Mapping> In at least one of the above-mentioned embodiments 3-1 to 3-7, if two TCI states are applied, the two TCI states may also be applied to at least one of a PDSCH to which SDM / FDM / TDM for multiple TRPs based on a single DCI is applied and an SFN PDSCH.

[0359] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state as the first TCI state and the second TCI state, respectively, in at least one of a PDSCH to which SDM / FDM / TDM for multiple TRPs based on a single DCI is applied and an SFN PDSCH.

[0360] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state as the first TCI state and the second TCI state, respectively, in at least one of a PDSCH to which SDM / FDM / TDM for multiple TRPs based on a single DCI is applied and an SFN PDSCH.

[0361] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state as the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID, respectively, in at least one of a PDSCH to which SDM / FDM / TDM for multiple TRPs based on a single DCI is applied and an SFN PDSCH.

[0362] In the present disclosure, "first" and "second" may be interpreted as interchangeable. Also, in the present disclosure, "lower" and "higher" may be interpreted as interchangeable.

[0363] In at least one of the above-described embodiments 3-1 to 3-7, one TCI state may be applied.

[0364] At this time, the UE may determine the one TCI state based on a specific rule.

[0365] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the PDSCH is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0366] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0367] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0368] At this time, the UE may also determine the one TCI state based on a specific DCI.

[0369] The specific DCI may be DCI that schedules the PDSCH (scheduling DCI).

[0370] The particular DCI may also be a DCI that activates a semi-persistent scheduling (SPS) PDSCH.

[0371] In this case, the same DCI field as the single TRP / multiple TRP switching field may be used as a field for repeated transmission (repetition) of PUSCH for multiple TRPs (defined in Rel. 17 and later).

[0372] In the third embodiment, different determination methods among the determination methods of embodiments 3-1 to 3-7 may be applied when a joint DL / UL TCI state is set and when a separate DL TCI state is set.

[0373] According to the third embodiment described above, it is possible to appropriately control the application of the unified TCI state to the PDSCH.

[0374] <Fourth embodiment> Two joint TCI states / separate UL TCI states may be indicated to the UE.

[0375] The UE may determine whether one TCI state or two TCI states are to be applied to the transmission of an UL channel (e.g., a PUSCH) among the two indicated TCI states. The UE may determine which one or more TCI states are to be applied to the transmission of an UL channel (e.g., a PUSCH) among the two indicated TCI states.

[0376] For determining the TCI state, the UE may follow at least one of the following embodiments 4-1 to 4-7.

[0377] Note that the method of determining the TCI state to be applied to the UL channel (for example, PUSCH) from the indicated TCI state may be the method described in the first embodiment.

[0378] <<Embodiment 4-1>> The joint TCI state / separate UL TCI state may not be applicable to at least one of the PUSCH, the PUSCH for multiple TRPs, and the multi-panel PUSCH.

[0379] The UE may assume that the joint TCI state / separate UL TCI state does not apply to at least one of the PUSCH, the PUSCH for multiple TRPs, and the multi-panel PUSCH.

[0380] <<Embodiment 4-2>> As a default, two TCI states may be applied to the transmission of the PUSCH.

[0381] The UE may apply two TCI states for transmitting the PUSCH.

[0382] The UE may assume that two TCI states are indicated for the transmission of the PUSCH.

[0383] <<Embodiment 4-3>> As a default, one TCI state may be applied to the transmission of the PUSCH.

[0384] The UE may apply one TCI state for transmitting the PUSCH.

[0385] The UE may assume that one TCI state is indicated for the transmission of the PUSCH.

[0386] <<Embodiment 4-4>> Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0387] If the higher layer signaling configures / indicates two TCI states for a PUSCH, the UE may apply the two TCI states to at least one of multiple (e.g., all) PUSCHs (dynamically granted (scheduled in DCI)) and multiple (e.g., all) configured-grant PUSCHs.

[0388] The configuration / instruction by the higher layer signaling may configure / instruct / enable at least one of a PUSCH for multiple TRPs and a PUSCH for multiple panels.

[0389] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0390] The setting / instruction by the higher layer signaling may be set / instructed commonly for a plurality of channels / signals (for example, PDSCH / PDCCH / PUSCH / PUCCH / CSI-RS / SRS).

[0391] The setting / instruction by the higher layer signaling may be set / instructed in each of a plurality of configured grant configurations.

[0392] The setting / instruction by the higher layer signaling may be set / instructed in all of the multiple configured grant configurations.

[0393] Embodiments 4-5 Whether one or both of the two indicated TCI states apply may be indicated within a particular DCI.

[0394] The specific DCI may be a DCI that schedules the PUSCH (scheduling DCI).

[0395] Furthermore, the specific DCI may be a DCI that activates a configuration grant PUSCH.

[0396] The specific DCI may also be a DCI that schedules a retransmission of a configuration grant PUSCH.

[0397] A specific field in a specific DCI may indicate whether one or both of the two indicated TCI states are applicable. In this case, a DCI field similar to the single TRP / multiple TRP switching field may be used, which may be similar (or the same) as the field for dynamic single / multiple TRP switching (switching field) in the case of repeated transmission of a PUSCH with multiple TRPs (defined in Rel. 17 and later).

[0398] 19A is a diagram illustrating an example of a switching field according to embodiments 4 and 5. As illustrated in FIG. 19A, a field indicating the single TRP mode or the multiple TRP mode and the TCI state to be applied may be included in the DCI (for example, DCI format 0_1 / 0_2).

[0399] In the example shown in Figure 19A, the UE determines the single TRP mode or the multi-TRP mode and the TCI state to apply based on the indicated code points. The "order of TRP#1, TRP#2" in Figure 19A may mean that the first repetition of the repeated PDSCH transmission corresponds to the first TCI state / TCI state with a lower TCI state ID, and the second repetition corresponds to the second TCI state / TCI state with a higher TCI state ID. Also, the "order of TRP#2, TRP#1" may mean that the first repetition of the repeated PDSCH transmission corresponds to the second TCI state / TCI state with a higher TCI state ID, and the second repetition corresponds to the first TCI state / TCI state with a lower TCI state ID.

[0400] 19A is merely an example and is not limited to this example. For example, there may be only one code point indicating single / multiple TRP mode. The field content indicating the TRP order may not be included.

[0401] 19B is a diagram showing another example of a switching field according to embodiments 4 and 5. A field indicating the single panel mode or the multi-panel mode and the TCI state to be applied as shown in FIG. 19B may be included in the DCI (for example, DCI format 0_1 / 0_2).

[0402] In the example shown in FIG. 19B, the UE determines at least one of the single panel mode or the multi-panel mode and the TCI state to apply based on the indicated code point.

[0403] The number of bits of the fields and the contents of the fields shown in FIG. 19B are merely an example and are not limited to this example.

[0404] Embodiments 4-6 The UE may be configured / instructed to apply one or two TCI states to the PUSCH using the number of repetitions of the PUSCH.

[0405] The UE may determine to apply one or two TCI states to the PUSCH based on the number of repetitions of the PUSCH.

[0406] For example, if a PUSCH with a repetition count of 1 is configured, the UE may determine to apply one TCI state to the PUSCH.

[0407] For example, if a PUSCH with a repetition number greater than 1 is configured, the UE may determine to apply two TCI states to the PUSCH.

[0408] Embodiments 4-7 The UE may determine whether to apply the above embodiments 4-1 to 4-6 based on the transmission scheme of the PUSCH.

[0409] Whether any of the above-described embodiments 4-1 to 4-6 is applied for each PUSCH transmission scheme may be predefined in the specifications. Whether any of the above-described embodiments 4-1 to 4-6 is applied for each PUSCH transmission scheme may be configured in the UE using higher layer signaling.

[0410] 20A to 20D are diagrams showing an example of application of the TCI state in embodiment 4. Figures 20A, 20B, 20C, and 20D correspond to the above embodiments 4-2, 4-3, 4-4, and 4-5, respectively.

[0411] In the example shown in Fig. 20A, the UE applies two TCI states to the transmission of the PUSCH, and in the example shown in Fig. 20B, the UE applies one TCI state to the transmission of the PUSCH.

[0412] In the example shown in Figure 20C, the UE receives higher layer signaling (RRC signaling / MAC CE) that configures / activates the application of one or two TCI states. In the example shown in Figure 20C, the higher layer signaling configures the application of two TCI states. Therefore, the UE applies two TCI states for PUSCH transmission.

[0413] In the example shown in Figure 20D, the number of TCI states to apply to the PUSCH is determined based on the DCI that schedules the PUSCH. In the example shown in Figure 20D, DCIs #1 and #3 indicate the application of two TCI states, and DCI #2 indicates the application of one TCI state.

[0414] PUSCH Mapping In at least one of the above-described embodiments 4-1 to 4-7, if two TCI states are applied, the two TCI states may also be applied to PUSCHs for multiple TRPs based on a single DCI.

[0415] The UE may determine that the first TCI state and the second TCI state indicated in the common TCI state correspond to the SRI of the first SRS resource set of the PUSCH for multiple TRPs and the SRI of the second SRS resource set of the PUSCH for multiple TRPs, respectively.

[0416] The UE may also determine that the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state correspond to the SRI of the first SRS resource set of the PUSCH for multiple TRPs and the SRI of the second SRS resource set of the PUSCH for multiple TRPs, respectively.

[0417] Note that the first SRS resource set may refer to an SRS resource set with a lower (or higher) ID, and the second SRS resource set may refer to an SRS resource set with a higher (or lower) ID.

[0418] In at least one of the above-described embodiments 4-1 to 4-7, if two TCI states are applied, the two TCI states may also be applied to UL transmission (PUSCH) using multiple panels.

[0419] The UE may determine that the first TCI state and the second TCI state indicated in the common TCI state correspond to the first SRI / SRI field / SRS resource set / panel in the multi-panel transmission and the second SRI / SRI field / SRS resource set / panel in the multi-panel transmission, respectively.

[0420] The UE may also determine that the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state correspond to a first SRI / SRI field / SRS resource set / panel in a multi-panel transmission and a second SRI / SRI field / SRS resource set / panel in a multi-panel transmission, respectively.

[0421] Note that the first SRS resource set / panel may refer to the SRS resource set / panel with a lower (or higher) ID, and the second SRS resource set / panel may refer to the SRS resource set / panel with a higher (or lower) ID.

[0422] In at least one of the above-described embodiments 4-1 to 4-7, one TCI state may be applied.

[0423] At this time, the UE may determine the one TCI state based on a specific rule.

[0424] For example, when two TCI states are indicated to a UE, the UE may determine that the TCI state to apply to the PUSCH is at least one of the first TCI state, the second TCI state, a TCI state with a lower TCI state ID, and a TCI state with a higher TCI state ID.

[0425] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0426] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0427] At this time, the UE may also determine the one TCI state based on a specific DCI.

[0428] The specific DCI may be a DCI that schedules the PUSCH (scheduling DCI).

[0429] Furthermore, the specific DCI may be a DCI that activates a configuration grant PUSCH.

[0430] The specific DCI may also be a DCI that schedules a retransmission of a configuration grant PUSCH.

[0431] In this case, the same DCI field as the single TRP / multiple TRP switching field may be used as a field for repeated transmission (repetition) of PUSCH for multiple TRPs (defined in Rel. 17 and later).

[0432] In the fourth embodiment, different determination methods among the determination methods of embodiments 4-1 to 4-7 may be applied when the joint DL / UL TCI state is set and when the separate UL TCI state is set.

[0433] According to the fourth embodiment described above, it is possible to appropriately control the application of the unified TCI state to the PUSCH.

[0434] <Fifth embodiment> Two joint TCI states / separate DL TCI states may be indicated to the UE.

[0435] The UE may determine whether one TCI state or two TCI states are to be applied to reception of a DL channel (e.g., PDCCH) among the two indicated TCI states. The UE may determine which one or more TCI states are to be applied to reception of a DL channel (e.g., PDCCH) among the two indicated TCI states.

[0436] For determining the TCI state, the UE may follow at least one of the following embodiments 5-1 to 5-7.

[0437] Note that the method of determining the TCI state to be applied to the DL channel (for example, PDCCH) from the indicated TCI state may be the method described in the first embodiment.

[0438] Embodiment 5-1 The joint TCI state / separate DL TCI state may not be applicable to at least one of the PDCCH and the SFN PDCCH.

[0439] The UE may assume that the joint TCI state / separate DL TCI state does not apply to at least one of the PDCCH and the SFN PDCCH.

[0440] Embodiment 5-2 As a default, two TCI states may apply to the reception of the PDCCH.

[0441] The UE may apply two TCI states for receiving the PDCCH.

[0442] The UE may assume that two TCI states are indicated for receiving the PDCCH.

[0443] Embodiment 5-3 As a default, one TCI state may be applied to the reception of the PDCCH.

[0444] The UE may apply one TCI state for receiving the PDCCH.

[0445] The UE may assume that one TCI state is indicated for reception of the PDCCH.

[0446] Embodiment 5-4 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0447] If the higher layer signaling configures / indicates two TCI states for a PDCCH, the UE may apply the two TCI states to multiple (e.g., all) PDCCHs / search space (SS) sets / CORESETs.

[0448] If the higher layer signaling configures / indicates two TCI states for a PDCCH, the UE may apply the two TCI states to at least one of multiple (e.g., all) UE-specific PDCCHs and multiple (e.g., all) non-UE-specific (UE-common) PDCCHs.

[0449] The configuration / indication by the higher layer signaling may configure / indicate / enable the SFN PDCCH scheme.

[0450] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0451] The setting / instruction by the higher layer signaling may be set / instructed commonly for a plurality of channels / signals (for example, PDSCH / PDCCH / PUSCH / PUCCH / CSI-RS / SRS).

[0452] <<Embodiment 5-5>> Whether one TCI state or two TCI states of the two indicated TCI states are applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each CORESET / SS set.

[0453] The configuration / indication by the higher layer signaling may configure / indicate / enable the SFN PDCCH scheme for each CORESET / SS set.

[0454] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0455] Embodiments 5-6 The UE may be configured / instructed to apply one or two TCI states to the PDCCH using the number of repetitions of the PDCCH.

[0456] The UE may determine to apply one or two TCI states to the PDCCH based on the number of repetitions of the PDCCH.

[0457] For example, if a PDCCH with a repetition count of 1 is configured, the UE may determine to apply one TCI state to the PDCCH.

[0458] For example, if a PDCCH with a repetition number greater than 1 is configured, the UE may determine to apply two TCI states to the PDCCH.

[0459] Embodiments 5-7 The UE may determine whether to apply the above embodiments 5-1 to 5-6 based on the PDCCH transmission scheme.

[0460] Whether any of the above-described embodiments 5-1 to 5-6 is applied for each PDCCH transmission scheme may be specified in advance in a specification. Whether any of the above-described embodiments 5-1 to 5-6 is applied for each PDCCH transmission scheme may be configured in a UE using higher layer signaling.

[0461] 21A to 21D are diagrams showing an example of application of the TCI state in embodiment 5. Figures 21A, 21B, 21C, and 21D correspond to the above embodiments 5-2, 5-3, 5-4, and 5-5, respectively.

[0462] In the example shown in Figure 21A, the UE applies two TCI states to the CORESET / PDCCH, and in the example shown in Figure 21B, the UE applies one TCI state to the CORESET / PDCCH.

[0463] In the example shown in Figure 21C, the UE receives higher layer signaling (RRC signaling / MAC CE) that configures / activates the application of one or two TCI states. In the example shown in Figure 21C, the higher layer signaling configures the application of two TCI states. Therefore, the UE applies two TCI states to the CORESET / PDCCH.

[0464] In the example shown in Fig. 21D, the number of TCI states to be applied to the CORESET / PDCCH is determined based on higher layer signaling for each CORESET. In the example shown in Fig. 21D, higher layer signaling is received indicating the application of two TCI states to CORESET / PDCCH#1 and the application of one TCI state to CORESET / PDCCH#2.

[0465] <PDCCH Mapping> In at least one of the above-described embodiments 5-1 to 5-7, if two TCI states are applied, the two TCI states may also be applied to the SFN PDCCH.

[0466] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state as the first TCI state and the second TCI state in the SFN PDCCH, respectively.

[0467] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state as the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID in the SFN PDCCH, respectively.

[0468] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state as the first TCI state and the second TCI state in the SFN PDCCH, respectively.

[0469] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state as the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID in the SFN PDCCH, respectively.

[0470] In the present disclosure, "first" and "second" may be interpreted as interchangeable. Also, in the present disclosure, "lower" and "higher" may be interpreted as interchangeable.

[0471] In at least one of the above-described embodiments 5-1 to 5-7, one TCI state may be applied.

[0472] At this time, the UE may determine the one TCI state based on a specific rule.

[0473] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the PDCCH is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0474] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0475] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0476] At this time, the UE may determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE) for each CORESET / SS set.

[0477] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0478] In the fifth embodiment, different determination methods among the determination methods of embodiments 5-1 to 5-7 may be applied when a joint DL / UL TCI state is set and when a separate DL TCI state is set.

[0479] According to the fifth embodiment described above, it is possible to appropriately control the application of the unified TCI state to the PDCCH.

[0480] Sixth Embodiment Two joint TCI states / separate DL TCI states may be indicated to the UE.

[0481] The UE may determine whether one TCI state or two TCI states are to be applied to the reception (monitoring) of the DL channel (e.g., PDCCH) / CORESET / SS set among the two indicated TCI states. The UE may determine which one or more TCI states are to be applied to the reception (monitoring) of the DL channel (e.g., PDCCH) / CORESET / SS set among the two indicated TCI states.

[0482] In this embodiment, for repeated transmission of PDCCH, one PDCCH / CORESET / SS set may be associated (linked) with another PDCCH / CORESET / SS set. In this embodiment, for repeated transmission of PDCCH, one PDCCH / CORESET / SS set may be configured to be linked with another PDCCH / CORESET / SS set.

[0483] In this disclosure, PDCCH / CORESET / SS sets that are associated with each other may be referred to as linked PDCCH / CORESET / SS sets.

[0484] Regarding the determination of the TCI state, if a PDCCH / CORESET / SS set is associated with another PDCCH / CORESET / SS set for repeated transmission of the PDCCH, the UE may follow at least one of the following embodiments 6-1 to 6-7.

[0485] Note that the method of determining the TCI state to be applied to the DL channel (for example, PDCCH) from the indicated TCI state may be the method described in the first embodiment.

[0486] Embodiment 6-1 The joint TCI state / separate DL TCI state may not be applicable to at least one of the PDCCH and the repeated transmission of the PDCCH.

[0487] The UE may assume that the joint TCI state / separate DL TCI state does not apply to at least one of the PDCCH and repeated transmission of the PDCCH.

[0488] Embodiment 6-2 For repeated transmission of PDCCH, when two linked PDCCH / CORESET / SS sets are configured, each of the two TCI states may be applied to the two linked PDCCH / CORESET / SS sets as a default.

[0489] For repeated transmission of PDCCH, if two linked PDCCH / CORESET / SS sets are configured, the UE may apply two TCI states to the two linked PDCCH / CORESET / SS sets, respectively.

[0490] In this case, one TCI state may correspond to one PDCCH / CORESET / SS set.

[0491] Embodiment 6-3 For repeated transmission of PDCCH, if two linked PDCCH / CORESET / SS sets are configured, one (same) TCI state may be applied to the two linked PDCCH / CORESET / SS sets as default.

[0492] For repeated transmission of PDCCH, if two linked PDCCH / CORESET / SS sets are configured, the UE may apply one (same) TCI state to the two linked PDCCH / CORESET / SS sets.

[0493] <<Embodiment 6-4>> Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0494] The UE may be configured / instructed to apply either of the above-mentioned embodiments 6-2 and 6-3 using higher layer signaling (RRC signaling / MAC CE).

[0495] The higher layer signaling may be a configuration / instruction common to multiple (eg, all) PDCCHs / search space (SS) sets / CORESETs.

[0496] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0497] Embodiment 6-5 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0498] The UE may be configured / instructed to apply either of the above-mentioned embodiments 6-2 and 6-3 using higher layer signaling (RRC signaling / MAC CE).

[0499] The higher layer signaling may be a common setting / instruction for at least one of a CORESET, a search space (SS) set, a pair of linked CORESETs, and a pair of linked SS sets.

[0500] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0501] <<Embodiment 6-6>> Whether one TCI state or two TCI states of the two indicated TCI states are applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each CORESET / SS set.

[0502] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0503] Embodiments 6-7 The UE may be configured / instructed to apply one or two TCI states to the PDCCH using the number of repetitions of the PDCCH.

[0504] The UE may determine to apply one or two TCI states to the PDCCH based on the number of repetitions of the PDCCH.

[0505] For example, if a PDCCH with a repetition count of 1 is configured, the UE may determine to apply one TCI state to the PDCCH.

[0506] For example, if a PDCCH with a repetition number greater than 1 is configured, the UE may determine to apply two TCI states to the PDCCH.

[0507] Regarding the determination of the TCI state, if a PDCCH / CORESET / SS set is not associated with another PDCCH / CORESET / SS set for repeated transmission of the PDCCH (if a PDCCH / CORESET / SS set is not configured to be linked with another PDCCH / CORESET / SS set for repeated transmission of the PDCCH), the UE may follow at least one of the following embodiments 6-8 to 6-9.

[0508] In addition, "when a PDCCH / CORESET / SS set is not associated with another PDCCH / CORESET / SS set" may be interpreted interchangeably as "when two linked PDCCH / CORESET / SS sets do not exist," "when PDCCH repeated transmission is not set," "when there is no linkage," etc.

[0509] Embodiments 6-8 The joint TCI state / separate DL TCI state may not be applicable to at least one of the PDCCH and the repeated transmission of the PDCCH.

[0510] The UE may assume that the joint TCI state / separate DL TCI state does not apply to at least one of the PDCCH and repeated transmission of the PDCCH.

[0511] Embodiments 6-9 As a default, one TCI state may be applied to the PDCCH / CORESET / SS set.

[0512] The UE may apply one TCI state to a PDCCH / CORESET / SS set.

[0513] The UE may assume that one TCI state is indicated for the PDCCH / CORESET / SS set.

[0514] 22A to 22D are diagrams showing an example of application of the TCI state in the sixth embodiment. Figures 22A, 22B, 22C, and 22D correspond to the above-mentioned embodiments 6-2 / 6-9, 6-3, 6-4, 6-5, and 6-6, respectively.

[0515] In the example shown in Figure 22A, for the CORESET / PDCCH, each of the two TCI states corresponds to one CORESET / PDCCH. In the example shown in Figure 22A, one TCI state corresponds to an unlinked CORESET.

[0516] In the example shown in FIG. 22B, the UE applies one (same) TCI state to multiple CORESET / PDCCHs.

[0517] In the example shown in Fig. 22C, the UE is configured / instructed to apply either of the above-mentioned embodiments 6-2 and 6-3 by using higher layer signaling (RRC signaling / MAC CE). In the example shown in Fig. 21C, the higher layer signaling configures the application of embodiment 6-2. Therefore, each TCI state of the two TCI states corresponds to one CORESET / PDCCH.

[0518] In the example shown in Fig. 22D, for embodiment 6-5, whether to apply either embodiment 6-2 or 6-3 for each CORESET is set / instructed using higher layer signaling. In the example shown in Fig. 22D, the higher layer signaling sets the application of embodiment 6-2 to CORESET / PDCCH#1 and CORESET / PDCCH#2, and sets the application of embodiment 6-3 to CORESET / PDCCH#3 and CORESET / PDCCH#4.

[0519] In the example shown in Fig. 22D, in embodiment 6-6, which TCI state to apply for each CORESET is configured / instructed using higher layer signaling. In the example shown in Fig. 22D, the higher layer signaling configures the application of a first TCI state to CORESET / PDCCH#1, CORESET / PDCCH#3, and CORESET / PDCCH#4, and configures the application of a second TCI state to CORESET / PDCCH#2.

[0520] <PDCCH Mapping> In at least one of the above-described embodiments 6-1 to 6-7, if two TCI states are applied, the two TCI states may also be applied to the SFN PDCCH.

[0521] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state to the two linked PDCCH / CORESET / SS sets, respectively.

[0522] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state to the CORESET / SS set corresponding to the lower CORESET ID / SS Set ID / CORESET Pool ID / TRP ID and the CORESET / SS set corresponding to the higher CORESET ID / SS Set ID / CORESET Pool ID / TRP ID, respectively.

[0523] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state to the CORESET / SS set corresponding to the lower CORESET ID / SS set ID / CORESET pool ID / TRP ID and the CORESET / SS set corresponding to the higher CORESET ID / SS set ID / CORESET pool ID / TRP ID, respectively.

[0524] In the present disclosure, "first" and "second" may be interpreted as interchangeable. Also, in the present disclosure, "lower" and "higher" may be interpreted as interchangeable.

[0525] In at least one of the above-mentioned embodiments 6-1 to 6-7, one (same) TCI state may be applied to two linked PDCCH / CORESET / SS sets.

[0526] At this time, the UE may determine the one TCI state based on a specific rule.

[0527] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the PDCCH is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0528] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0529] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0530] At this time, the UE may determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE) for each CORESET / SS set.

[0531] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0532] In at least one of the above-mentioned Embodiments 6-8 and 6-9, one TCI state may be applied to a PDCCH / CORESET / SS set without linkage.

[0533] At this time, the UE may determine the one TCI state based on a specific rule.

[0534] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the PDCCH is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0535] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0536] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0537] At this time, the UE may determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE) for each CORESET / SS set.

[0538] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0539] In the sixth embodiment, different determination methods among the determination methods of embodiments 6-1 to 6-9 may be applied when a joint DL / UL TCI state is set and when a separate DL TCI state is set.

[0540] According to the sixth embodiment described above, even when repeated transmission of PDCCH is used, it is possible to appropriately control application of the unified TCI state to the PDCCH.

[0541] Seventh Embodiment Two joint TCI states / separate UL TCI states may be indicated to the UE.

[0542] The UE may determine whether one TCI state or two TCI states are to be applied to the transmission of an UL channel (e.g., PUCCH) among the two indicated TCI states. The UE may determine which one or more TCI states are to be applied to the transmission of an UL channel (e.g., PUCCH) among the two indicated TCI states.

[0543] For determining the TCI state, the UE may follow at least one of the following embodiments 7-1 to 7-7.

[0544] Note that the method of determining the TCI state to be applied to the UL channel (for example, PUCCH) from the indicated TCI state may be the method described in the first embodiment.

[0545] Embodiment 7-1 The joint TCI state / separate UL TCI state may not be applicable to at least one of the PUCCH and the PUCCH for multiple TRPs.

[0546] The UE may assume that the joint TCI state / separate UL TCI state does not apply to at least one of the PUCCH and the PUCCH for multiple TRPs.

[0547] Embodiment 7-2 As a default, two TCI states may apply to the transmission of PUCCH.

[0548] The UE may apply two TCI states for transmitting the PUCCH.

[0549] The UE may assume that two TCI states are indicated for PUCCH transmission.

[0550] Embodiment 7-3 As a default, one TCI state may be applied to the transmission of the PUCCH.

[0551] The UE may apply one TCI state for transmitting the PUCCH.

[0552] The UE may assume that one TCI state is indicated for the transmission of the PUCCH.

[0553] Embodiment 7-4 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0554] If the higher layer signaling configures / indicates two TCI states for the PUCCH, the UE may apply the two TCI states to multiple (eg, all) PUCCH resources.

[0555] If the higher layer signaling configures / indicates two TCI states for a PUCCH, the UE may apply the two TCI states to at least one of multiple (e.g., all) UE-specific PUCCHs and multiple (e.g., all) non-UE-specific (UE-common) PUCCHs.

[0556] The configuration / instruction by the higher layer signaling may configure / instruct / enable PUCCH for multiple TRPs.

[0557] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0558] The setting / instruction by the higher layer signaling may be set / instructed commonly for a plurality of channels / signals (for example, PDSCH / PDCCH / PUSCH / PUCCH / CSI-RS / SRS).

[0559] Embodiment 7-5 Whether one TCI state or two TCI states of the two indicated TCI states are applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each PUCCH resource.

[0560] The configuration / indication by the higher layer signaling may configure / indicate / enable PUCCH for multiple TRPs for a certain PUCCH resource.

[0561] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0562] In this embodiment, a PUCCH resource may be interchangeably read as a group of PUCCH resources.

[0563] Embodiment 7-6 The UE may be configured / instructed to apply one or two TCI states to the PUCCH using the number of repetitions of the PUCCH.

[0564] The UE may determine to apply one or two TCI states to the PUCCH based on the number of repetitions of the PUCCH.

[0565] For example, if a PUCCH with a repetition count of 1 is configured, the UE may determine to apply one TCI state to the PUCCH.

[0566] For example, if a PUCCH with a repetition number greater than 1 is configured, the UE may determine to apply two TCI states to the PUCCH.

[0567] Embodiment 7-7 The UE may determine whether to apply the above embodiments 7-1 to 7-6 based on the PUCCH transmission scheme.

[0568] Whether any of the above-described embodiments 7-1 to 7-6 is applied for each PUCCH transmission scheme may be predefined in the specifications. Whether any of the above-described embodiments 7-1 to 7-6 is applied for each PUCCH transmission scheme may be configured in the UE using higher layer signaling.

[0569] 23A to 23D are diagrams showing an example of application of the TCI state in the seventh embodiment. Figures 23A, 23B, 23C, and 23D correspond to the above-mentioned embodiments 7-2, 7-3, 7-4, and 7-5, respectively.

[0570] In the example shown in Figure 23A, the UE applies two TCI states to PUCCH transmissions, and in the example shown in Figure 23B, the UE applies one TCI state to PUCCH transmissions.

[0571] In the example shown in Figure 23C, the UE receives higher layer signaling (RRC signaling / MAC CE) that configures / activates the application of one or two TCI states. In the example shown in Figure 23C, the higher layer signaling configures the application of two TCI states. Therefore, the UE applies two TCI states for PUCCH transmission.

[0572] In the example shown in Figure 23D, the number of TCI states to apply to the PUCCH is determined based on higher layer signaling for each PUCCH (PUCCH resource). In the example shown in Figure 23D, higher layer signaling is received indicating the application of two TCI states to PUCCH #1 and the application of one TCI state to PUCCH #2.

[0573] PUCCH Mapping In at least one of the above-described embodiments 7-1 to 7-7, if two TCI states are applied, the two TCI states may also be applied to the PUCCH for multiple TRPs.

[0574] The UE may determine that the first TCI state and the second TCI state indicated in the common TCI state correspond to the spatial relationship of the first PUCCH of the PUCCH for multiple TRPs and the spatial relationship of the second PUCCH of the PUCCH for multiple TRPs, respectively.

[0575] The UE may also determine that the first TCI state and the second TCI state indicated in the common TCI state correspond to the spatial relationship of the PUCCHs with lower IDs of the PUCCHs for multiple TRPs and the spatial relationship of the PUCCHs with higher IDs of the PUCCHs for multiple TRPs, respectively.

[0576] The UE may also determine that the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state correspond to the spatial relationship of the first PUCCH of the PUCCH for multiple TRPs and the spatial relationship of the second PUCCH of the PUCCH for multiple TRPs, respectively.

[0577] The UE may also determine that the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state correspond to the spatial relationship of the PUCCH with the lower ID of the PUCCH for multiple TRPs and the spatial relationship of the PUCCH with the higher ID of the PUCCH for multiple TRPs, respectively.

[0578] In at least one of the above-described embodiments 7-1 to 7-7, one TCI state may be applied.

[0579] At this time, the UE may determine the one TCI state based on a specific rule.

[0580] For example, when two TCI states are indicated to a UE, the UE may determine that the TCI state to apply to the PUCCH is at least one of the first TCI state, the second TCI state, a TCI state with a lower TCI state ID, and a TCI state with a higher TCI state ID.

[0581] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0582] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0583] At this time, the UE may determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE) for each PUCCH resource.

[0584] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0585] In this embodiment, a PUCCH resource may be interchangeably read as a group of PUCCH resources.

[0586] In the seventh embodiment, different determination methods among the determination methods of embodiments 7-1 to 7-7 may be applied when the joint DL / UL TCI state is set and when the separate UL TCI state is set.

[0587] According to the seventh embodiment, it is possible to appropriately control the application of the unified TCI state to the PUCCH.

[0588] [Analysis 4] In Rel. 17 and later, in the joint / separate TCI state framework, at least one of two joint DL / UL TCI states, two DL TCI states, and two UL TCI states is indicated to the UE.

[0589] At this time, there has been insufficient consideration as to how to apply one or two TCI states to DL / UL reference signals (RS).

[0590] For example, there is insufficient consideration on how to apply one or two TCI states to CSI-RS / SRS.

[0591] Furthermore, for example, when two TCI states are applied, there is insufficient consideration as to how to apply the two TCI states to the CSI-RS / SRS.

[0592] Furthermore, for example, when one TCI state is applied, there is insufficient consideration as to how to apply two TCI states to the CSI-RS / SRS.

[0593] If these considerations are not sufficient, the TCI state cannot be applied appropriately to each RS, which may result in degradation of communication quality and throughput.

[0594] Hereinafter, methods for solving the problems in analysis 4 will be described in the eighth and ninth embodiments.

[0595] Eighth Embodiment Two joint TCI states / separate UL TCI states may be indicated to the UE.

[0596] The UE may determine / judge one or two TCI states to apply to transmission of an UL reference signal (eg, SRS).

[0597] The UE may determine whether one TCI state or two TCI states are to be applied to the transmission of an UL reference signal (e.g., SRS) among the two indicated TCI states. The UE may determine which one or more TCI states are to be applied to the transmission of an UL reference signal (e.g., SRS) among the two indicated TCI states.

[0598] One SRS resource set may be configured for the UE. Regarding the determination of the TCI state, the UE may follow at least one of the following embodiments 8-1 and 8-2.

[0599] Note that the method of determining the TCI state to be applied to the UL reference signal (for example, SRS) from the indicated TCI state may be the method described in the first embodiment.

[0600] <<Embodiment 8-1>> The joint TCI condition / separate UL TCI condition may not be applicable to the SRS.

[0601] The UE may assume that the joint TCI state / separate UL TCI state does not apply to the SRS.

[0602] <<Embodiment 8-2>> The UE may apply one TCI state to the SRS resources included in one SRS resource set.

[0603] The UE may assume that one TCI state is indicated for the SRS resources included in one SRS resource set.

[0604] A UE may be configured with multiple SRS resource sets, which may include at least one of SRS resource sets for multiple TRPs and SRS resource sets for multi-panel UL transmissions.

[0605] For determining the TCI state, the UE may follow at least one of the following embodiments 8-3 to 8-7.

[0606] Embodiment 8-3 The joint TCI condition / separate UL TCI condition may not be applicable to the SRS.

[0607] The UE may assume that the joint TCI state / separate UL TCI state does not apply to the SRS.

[0608] Embodiment 8-4 As a default, when two SRS resource sets are configured, two TCI states may be applied to the two SRS resource sets, respectively.

[0609] If two SRS resource sets are configured, the UE may apply two TCI states to the two SRS resource sets, respectively.

[0610] In this case, one TCI state may correspond to one SRS resource set.

[0611] Embodiment 8-5 As a default, one TCI state may apply to multiple (eg, all) SRS resource sets.

[0612] The UE may apply one TCI state to the transmission of the SRS.

[0613] The UE may assume that one TCI state is indicated for the transmission of the SRS.

[0614] Embodiment 8-6 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0615] The UE may be configured / instructed to apply either of the above-mentioned embodiments 8-4 and 8-5 using higher layer signaling (RRC signaling / MAC CE).

[0616] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0617] Embodiments 8-7 Whether one TCI state or two TCI states of the two indicated TCI states are applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each SRS resource set / each SRS resource.

[0618] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0619] A joint TCI state / separate UL TCI state may be indicated to the UE.

[0620] In addition, a UE may be configured with multiple codebook (CB) / non-codebook (NCB) SRS resource sets for multi-panel use, and the multiple CB / NCB SRS resource sets may be configured for multiple TRPs.

[0621] When one joint TCI state / separate UL TCI state is indicated to the UE and SRS resource sets of multiple CBs / NCBs are configured, the UE may follow at least one of the following embodiments 8-8 and 8-9 in determining the TCI state.

[0622] Embodiment 8-8 The joint TCI condition / separate UL TCI condition may not be applicable to the SRS.

[0623] The UE may assume that the joint TCI state / separate UL TCI state does not apply to the SRS.

[0624] Embodiments 8-9 The UE may apply one TCI state to SRS resources included in multiple (eg, all) SRS resource sets.

[0625] The UE may assume that one TCI state is indicated for SRS resources included in multiple (eg, all) SRS resource sets.

[0626] 24A to 24D are diagrams showing an example of application of the TCI state in the eighth embodiment. Figures 24A, 24B, 24C, and 24D correspond to the above-mentioned embodiments 8-4, 8-5, 8-6, and 8-7, respectively.

[0627] In the example shown in FIG. 24A, for an SRS resource set, each of the two TCI states corresponds to a respective SRS resource set.

[0628] In the example shown in FIG. 24B, the UE applies one (same) TCI state to multiple SRS resource sets.

[0629] In the example shown in Figure 24C, the UE is configured / instructed to apply either of the above-mentioned embodiments 8-4 and 8-5 using higher layer signaling (RRC signaling / MAC CE). In the example shown in Figure 24C, the higher layer signaling configures the application of embodiment 8-4. Therefore, each of the two TCI states corresponds to one SRS resource set.

[0630] In the example shown in Figure 24D, which TCI state to apply for each SRS resource set is configured / instructed using higher layer signaling, which configures the application of a first TCI state for SRS resource set #1 and a second TCI state for SRS resource set #2.

[0631] SRS Mapping In at least one of the above-described embodiments 8-3 to 8-7, if two TCI states are applied, the two TCI states may correspond to a specific SRS.

[0632] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state to the SRS resource set corresponding to the lower SRS resource set ID / panel ID / TRP ID and the SRS resource set corresponding to the higher SRS resource set ID / panel ID / TRP ID, respectively.

[0633] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state to the SRS resource set corresponding to the lower SRS resource set ID / panel ID / TRP ID and the SRS resource set corresponding to the higher SRS resource set ID / panel ID / TRP ID, respectively.

[0634] In the present disclosure, "first" and "second" may be interpreted as interchangeable. Also, in the present disclosure, "lower" and "higher" may be interpreted as interchangeable.

[0635] In at least one of the above-described embodiments 8-1 to 8-9, one (same) TCI state may be applied to multiple SRS resource sets.

[0636] At this time, the UE may determine the one TCI state based on a specific rule.

[0637] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the SRS is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0638] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0639] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0640] In at least one of the above-described embodiments 8-1 to 8-9, one TCI state may be applied to multiple SRS resource sets.

[0641] At this time, the UE may determine the one TCI state based on a specific rule.

[0642] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the SRS is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0643] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0644] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0645] <<Modification of the Eighth Embodiment>> A UE may be configured with one SRS resource set / SRS resource having multiple joint TCI states / UL TCI states.

[0646] The UE may transmit multiple SRSs (SRS resources) using multiple beams in the same time resource (e.g., symbol). The UE may transmit the SRSs simultaneously using multiple beams.

[0647] A UE may also transmit multiple SRSs (SRS resources) using one beam in a certain time resource (e.g., symbol), and may change beams in different time resources (e.g., symbols / slots / transmission opportunities / time domain opportunities).

[0648] Fig. 25 is a diagram illustrating an example of a TCI state according to a modification of the eighth embodiment. In the example illustrated in Fig. 25, the UE transmits SRS using different beams (TCI states (TCI state #1 and TCI state #2)) for SRS resource sets transmitted in different time resources (slots in Fig. 25).

[0649] The SRS in the eighth embodiment may be at least one of a periodic SRS, a semi-persistent SRS, and an aperiodic SRS. Also, the SRS in the eighth embodiment may be at least one of an SRS with a codebook usage, an SRS with a non-codebook usage, an SRS with a beam management usage, and an SRS with an antenna switching usage.

[0650] In the eighth embodiment, different determination methods among the determination methods of embodiments 8-1 to 8-9 may be applied when the joint DL / UL TCI state is set and when the separate UL TCI state is set.

[0651] According to the eighth embodiment, it is possible to appropriately control the application of the unified TCI state to the SRS.

[0652] <Ninth embodiment> Two joint TCI states / separate DL TCI states may be indicated to the UE.

[0653] The UE may determine whether one or two of the two indicated TCI states are to be applied to reception of a DL reference signal (e.g., CSI-RS). The UE may determine which one or more of the two indicated TCI states are to be applied to reception of a DL reference signal (e.g., CSI-RS).

[0654] In this embodiment, the terms Channel Measurement Resource (CMR), resourcesForChannelMeasurement, CSI-RS for channel measurement, CSI-RS resource for channel measurement, CSI-RS, and CSI-RS resource may be interchangeable. Also, in the present disclosure, the terms set, subset, and group may be interchangeable.

[0655] For a UE, one CSI-RS resource set may be configured in one resource setting / report setting. Regarding the determination of the TCI state, the UE may follow at least one of the following embodiments 9-1 and 9-2.

[0656] Note that the method of determining the TCI state to be applied to the DL reference signal (for example, CSI-RS) from the indicated TCI state may be the method described in the first embodiment.

[0657] Embodiment 9-1 Joint TCI state / separate DL TCI state may not be applicable for CSI-RS.

[0658] The UE may assume that the joint TCI state / separate DL TCI state does not apply to the CSI-RS.

[0659] Embodiment 9-2 A UE may apply one TCI state to the CSI-RS resources included in one CSI-RS resource set.

[0660] The UE may assume that one TCI state is indicated for the CSI-RS resources included in one CSI-RS resource set.

[0661] A UE may be configured with multiple CSI-RS resource sets, which may include at least one of CSI-RS resource sets for beam management for multiple TRPs and CSI-RS resource sets for CSI for multiple TRPs.

[0662] For determining the TCI state, the UE may follow at least one of the following embodiments 9-3 to 9-7.

[0663] Embodiment 9-3 Joint TCI state / separate DL TCI state may not be applicable for CSI-RS.

[0664] The UE may assume that the joint TCI state / separate DL TCI state does not apply to the CSI-RS.

[0665] Embodiment 9-4 As a default, when two CSI-RS resource sets are configured, two TCI states may apply to the two CSI-RS resource sets, respectively.

[0666] If two CSI-RS resource sets are configured, the UE may apply two TCI states to the two CSI-RS resource sets, respectively.

[0667] In this case, one TCI state may correspond to one CSI-RS resource set.

[0668] <<Embodiment 9-5>> As a default, one TCI state may apply to multiple (eg, all) CSI-RS resource sets.

[0669] The UE may apply one TCI state to the reception of CSI-RS.

[0670] The UE may assume that one TCI state is indicated for reception of the CSI-RS.

[0671] Embodiment 9-6 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0672] The UE may be configured / instructed using higher layer signaling (RRC signaling / MAC CE) as to whether to apply either of the above-mentioned embodiments 9-4 and 9-5.

[0673] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0674] Embodiment 9-7 Whether one TCI state or two TCI states of the two indicated TCI states are applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each CSI-RS resource set / each CSI-RS resource.

[0675] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0676] 26A to 26D are diagrams showing an example of application of the TCI state in the 9th embodiment. Figures 26A, 26B, 26C, and 26D correspond to the above-mentioned embodiments 9-4, 9-5, 9-6, and 9-7, respectively.

[0677] In the example shown in FIG. 26A, for a CSI-RS resource set, each of the two TCI states corresponds to a respective CSI-RS resource set.

[0678] In the example shown in FIG. 26B, the UE applies one (same) TCI state to multiple CSI-RS resource sets.

[0679] In the example shown in Figure 26C, the UE is configured / instructed to apply either of the above-mentioned Embodiments 9-4 and 9-5 using higher layer signaling (RRC signaling / MAC CE). In the example shown in Figure 26C, the higher layer signaling configures the application of Embodiment 9-4. Therefore, each of the two TCI states corresponds to one CSI-RS resource set.

[0680] In the example shown in Figure 26D, which TCI state to apply for each CSI-RS resource set is configured / instructed using higher layer signaling. In the example shown in Figure 26D, the higher layer signaling configures the application of a first TCI state for CSI-RS resource set #1 and configures the application of a second TCI state for CSI-RS resource set #2.

[0681] A plurality of CSI-RS resource pairs (CMR pairs) may be configured for a UE, and the plurality of CSI-RS resource pairs may be CSI-RS resource pairs for CSI for multiple TRPs.

[0682] For determining the TCI state, the UE may follow at least one of the following embodiments 9-8 to 9-13.

[0683] Embodiments 9-8 Joint TCI state / separate DL TCI state may not be applicable for CSI-RS.

[0684] The UE may assume that the joint TCI state / separate DL TCI state does not apply to the CSI-RS.

[0685] <<Embodiment 9-9>> As a default, when two CSI-RS resource sets are configured, two TCI states may apply to the two CSI-RS resource sets, respectively.

[0686] When a pair of CSI-RS resources is configured, the UE may apply two TCI states to the two CSI-RS resources in one pair, respectively.

[0687] In this case, one TCI state may correspond to one CSI-RS resource.

[0688] Embodiments 9-10 As a default, one TCI state may be applied to the two CSI-RS resources in one pair.

[0689] The UE may apply one TCI state to the reception of the CSI-RS.

[0690] The UE may assume that one TCI state is indicated for reception of the CSI-RS.

[0691] Embodiments 9-11 Whether one TCI state or two TCI states of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE).

[0692] The UE may be configured / instructed using higher layer signaling (RRC signaling / MAC CE) as to whether to apply any of the above-mentioned embodiments 9-9 and 9-10.

[0693] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0694] Embodiments 9-12 Whether one or two of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each CSI-RS resource / each pair of CSI-RS resources.

[0695] The UE may be configured / instructed to apply either of the above-mentioned embodiments 9-9 and 9-10 using the higher layer signaling (RRC signaling / MAC CE).

[0696] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0697] Embodiments 9-13 Whether one or two of the two indicated TCI states are to be applied may be instructed / configured to the UE by higher layer signaling (RRC signaling / MAC CE) for each CSI-RS resource.

[0698] The setting / instruction by the higher layer signaling may be set / instructed for each CC / BWP, or may be set / instructed for each set of available CCs / BWPs.

[0699] A joint TCI state / separate DL TCI state may be indicated to the UE.

[0700] Additionally, multiple CSI-RS resources may be configured for a UE within one resource setting / reporting setting.

[0701] 27A to 27D are diagrams showing other examples of application of the TCI state in the 9th embodiment. Figures 27A, B, C, and D correspond to the above-mentioned embodiments 9-9, 9-10, 9-11 / 9-12, and 9-13, respectively.

[0702] In the example shown in FIG. 27A, for a CSI-RS resource in one CMR pair, each of the two TCI states corresponds to a respective CSI-RS resource.

[0703] In the example shown in FIG. 27B, the UE applies one (same) TCI state to multiple CSI-RS resources in one CMR pair.

[0704] In the example shown in Figure 27C, the UE is configured / instructed to apply either of the above-mentioned Embodiments 9-9 and 9-10 within one CMR pair using higher layer signaling (RRC signaling / MAC CE). In the example shown in Figure 27C, the higher layer signaling configures the application of Embodiments 9-9. Therefore, each of the two TCI states corresponds to one CSI-RS resource within one CMR pair.

[0705] In the example shown in Figure 27D, which TCI state to apply to each CSI-RS resource in one CMR pair is configured / instructed using higher layer signaling. In the example shown in Figure 27D, the higher layer signaling configures the application of a first TCI state for CSI-RS resource #1 and the application of a second TCI state for CSI-RS resource #2.

[0706] When one joint TCI state / separate DL TCI state is indicated to the UE and multiple CSI-RS resources are configured within one resource setting / reporting setting, the UE may follow at least one of the following embodiments 9-14 and 9-15 for determining the TCI state.

[0707] Embodiments 9-14 Joint TCI state / separate DL TCI state may not be applicable for CSI-RS.

[0708] The UE may assume that the joint TCI state / separate DL TCI state does not apply to the CSI-RS.

[0709] Embodiments 9-15 The UE may apply one TCI state to CSI-RS resources included in multiple (eg, all) CSI-RS resource sets.

[0710] The UE may assume that one TCI state is indicated for CSI-RS resources included in multiple (eg, all) CSI-RS resource sets.

[0711] CSI-RS Mapping In at least one of the above-described embodiments 9-1 to 9-13, if two TCI states are applied, the two TCI states may correspond to a specific CSI-RS.

[0712] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state to the first CSI-RS resource set / CSI-RS resources and the second CSI-RS resource / CSI-RS resources, respectively.

[0713] The UE may apply the first TCI state and the second TCI state indicated in the common TCI state to the CSI-RS resource set / CSI-RS resources corresponding to the lower CSI-RS resource set ID / group ID / TRP ID and the CSI-RS resource set / CSI-RS resources corresponding to the higher CSI-RS resource set ID / group ID / TRP ID, respectively.

[0714] The UE may also apply the TCI state with the lower TCI state ID and the TCI state with the higher TCI state ID indicated in the common TCI state to the first CSI-RS resource set / CSI-RS resources and the second CSI-RS resource / CSI-RS resources, respectively.

[0715] The UE may also apply the TCI state with a lower TCI state ID and the TCI state with a higher TCI state ID indicated in the common TCI state to the CSI-RS resource set / CSI-RS resource corresponding to the lower CSI-RS resource set ID / group ID / TRP ID and the CSI-RS resource set / CSI-RS resource corresponding to the higher CSI-RS resource set ID / group ID / TRP ID, respectively.

[0716] In the present disclosure, "first" and "second" may be interpreted as interchangeable. Also, in the present disclosure, "lower" and "higher" may be interpreted as interchangeable.

[0717] In at least one of the above-described embodiments 9-1 to 9-15, one (same) TCI state may be applied to multiple CSI-RS resource sets / CSI-RS resources.

[0718] At this time, the UE may determine the one TCI state based on a specific rule.

[0719] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the CSI-RS resource set / CSI-RS resource is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0720] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0721] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0722] In at least one of the above-described embodiments 9-1 to 9-15, one TCI state may be applied to multiple CSI-RS resource sets / CSI-RS resources.

[0723] At this time, the UE may determine the one TCI state based on a specific rule.

[0724] For example, when two TCI states are indicated to a UE, the UE may determine that the one TCI state to apply to the CSI-RS resource set / CSI-RS resource is at least one of the first TCI state, the second TCI state, the TCI state with a lower TCI state ID, and the TCI state with a higher TCI state ID.

[0725] At this time, the UE may also determine the one TCI state based on higher layer signaling (RRC signaling / MAC CE).

[0726] The setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each CC / BWP. Also, the setting / instruction by the higher layer signaling (RRC signaling / MAC CE) may be set / instructed for each set of available CCs / BWPs.

[0727] The CSI-RS in the ninth embodiment may be at least one of a periodic CSI-RS, a semi-persistent CSI-RS, and an aperiodic CSI-RS. Also, the CSI-RS in the ninth embodiment may be at least one of a CSI-RS for beam management and a CSI-SRS for channel state information (CSI).

[0728] In the ninth embodiment, different determination methods among the determination methods of embodiments 9-1 to 9-15 may be applied when a joint DL / UL TCI state is set and when a separate DL TCI state is set.

[0729] In addition, in the ninth embodiment, one CSI-RS having multiple TCI states may be configured, and the UE may receive CSI-RS of an SFN from multiple (for example, two) TRPs.

[0730] According to the ninth embodiment, it is possible to appropriately control the application of the unified TCI state to the CSI-RS.

[0731] <Other embodiments> An upper layer parameter (RRC IE) / UE capability corresponding to a function (feature) in at least one of the above embodiments may be defined. The UE capability may indicate that the function is supported.

[0732] A UE configured with higher layer parameters corresponding to the function (enabling the function) may perform the function. It may also be specified that "a UE not configured with higher layer parameters corresponding to the function shall not perform the function (for example, in accordance with Rel. 15 / 16)."

[0733] A UE that reports a UE capability indicating that it supports the function may perform the function. It may also be specified that a UE that does not report a UE capability indicating that it supports the function shall not perform the function (e.g., in accordance with Rel. 15 / 16).

[0734] If the UE reports a UE capability indicating that it supports the function and the corresponding upper layer parameters are configured, the UE may perform the function. It may also be specified that "if the UE does not report a UE capability indicating that it supports the function or if the corresponding upper layer parameters are not configured, the UE shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0735] The UE capability may indicate whether the UE supports this feature.

[0736] The function may be the application of common / uniform TCI conditions.

[0737] The function may be the application of joint DL / UL TCI conditions.

[0738] The function may be application of separate DL / UL TCI conditions.

[0739] UE capabilities may be defined as whether or not it supports joint DL / UL TCI states (modes).

[0740] UE capability may be defined as whether it supports the M=1, N=2 joint DL / UL TCI state (mode).

[0741] UE capability may be defined as whether it supports the M=2, N=1 joint DL / UL TCI state (mode).

[0742] UE capabilities may be defined as whether or not separate DL / UL TCI states (modes) are supported.

[0743] The UE capability may be defined as whether it supports the separate DL / UL TCI state with M=1, N=2.

[0744] The UE capability may be defined as whether it supports the separate DL / UL TCI state with M=2, N=1.

[0745] UE capability may be defined as whether it supports dynamic / semi-static switching of joint DL / UL TCI states (modes).

[0746] UE capabilities may be defined as whether or not it supports dynamic / semi-static switching of separate DL / UL TCI states (modes).

[0747] In this disclosure, dynamic / semi-static switching may refer to switching based on RRC signaling / MAC CE / DCI.

[0748] The UE capability may be defined as whether it supports dynamic / semi-static switching between joint DL / UL TCI states (modes) and / or separate DL / UL TCI states (modes) in at least two of the following cases: ·M=1, N=1. ·M=1, N=2. ·M=2, N=1. ·M=2, N=2.

[0749] The UE capability may be defined as whether or not it supports the application of a unified TCI state to PDSCH / PUSCH / PDCCH / PUCCH for a single TRP when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0750] The UE capability may be defined as whether or not it supports the application of a unified TCI state to PDSCH / PUSCH / PUCCH for multiple TRPs based on a single DCI when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0751] The UE capability may be defined as whether or not it supports the application of unified TCI states to SFN PDSCH / PDCCH when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0752] The UE capability may be defined as whether it supports the application of a unified TCI state for repetition of PDCCH for single / multiple TRPs when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0753] The UE capability may be defined as whether or not it supports the application of a unified TCI state to a multi-panel PUSCH when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0754] UE capability may be defined as whether it supports dynamic / semi-static switching of PDSCH / PUSCH / PDCCH / PUCCH for single / multiple TRPs.

[0755] UE capability may be defined as whether it supports dynamic / semi-static switching of single / multi-panel PUSCH.

[0756] The UE capability may be defined as whether or not it supports the application of a unified TCI state to SRS when one SRS resource set is configured in the case where multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0757] The UE capability may be defined as whether or not it supports the application of a unified TCI state to SRS when multiple SRS resources are configured in the unified TCI state framework, where multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated.

[0758] The UE capability may be defined as whether or not it supports the application of a unified TCI state to CSI-RS when one CSI-RS resource set is configured within one resource setting / reporting setting when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0759] The UE capability may be defined as whether or not it supports the application of a unified TCI state to CSI-RS when multiple CSI-RS resource sets are configured within one resource setting / reporting setting when multiple DL TCI states / multiple UL TCI states / multiple joint TCI states are indicated in the unified TCI state framework.

[0760] According to the above and other embodiments, the UE can achieve the above functions while maintaining compatibility with existing specifications.

[0761] (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.

[0762] 28 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) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0763] 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.

[0764] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the 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.

[0765] 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 the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0766] 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.

[0767] 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 (CC) and dual connectivity (DC).

[0768] 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 above 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 be a frequency band higher than FR2.

[0769] 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.

[0770] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station 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.

[0771] 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.

[0772] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0773] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio 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).

[0774] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0775] 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.

[0776] 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)), etc. may be used as an uplink channel.

[0777] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0778] 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.

[0779] 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 an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0780] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search 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 a CORESET associated with a certain search space based on the search space configuration.

[0781] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0782] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement 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.

[0783] 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.

[0784] 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, 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 as DL-RS.

[0785] 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 the SS (PSS, SSS) and the PBCH (and 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 reference signals.

[0786] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. 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).

[0787] (base station) 29 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.

[0788] 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.

[0789] 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.

[0790] 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 to be transmitted as signals, control information, sequences, etc., 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.

[0791] 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.

[0792] The transmitting / receiving unit 120 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 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0793] 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 pertains, such as an array antenna.

[0794] 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.

[0795] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0796] The transceiver 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.

[0797] The transceiver 120 (transmission processor 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.

[0798] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0799] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0800] 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.

[0801] 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.

[0802] 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.

[0803] 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.

[0804] The transceiver 120 may transmit downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals. When the number of TCI states (joint TCI state / separate DL TCI state) indicated for downlink (DL) signals included in the plurality of signals differs from the number of TCI states (joint TCI state / separate UL TCI state) indicated for uplink (UL) signals included in the plurality of signals, the controller 110 may determine the TCI state to be applied to the DL signals and the TCI state to be applied to the UL signals (first and second embodiments).

[0805] The transceiver 120 may transmit downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals. When a plurality of TCI states (joint TCI states / separate DL TCI states) are indicated for downlink (DL) channels included in the plurality of signals, the controller 110 may determine the number of TCI states to apply to the DL channels based on at least one of higher layer signaling, a specific DCI, and a specific control resource set (third, fifth, and sixth embodiments).

[0806] The transceiver 120 may transmit downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals. When a plurality of TCI states are indicated for uplink (UL) channels included in the plurality of signals, the controller 110 may determine the number of TCI states (joint TCI states / separate UL TCI states) to be applied to the UL channels based on at least one of higher layer signaling and specific DCI (fourth and seventh embodiments).

[0807] The transceiver 120 may transmit configuration information of resource sets for at least one of a sounding reference signal (SRS) and a channel state information reference signal (CSI-RS), and downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals including at least one of the SRS and the CSI-RS. The control unit 110 may determine the TCI state to be applied to at least one of the SRS and the CSI-RS based on the number of resource sets for the SRS and the CSI-RS (eighth and ninth embodiments).

[0808] (user terminal) 30 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 transmitting / receiving 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 transmitting / receiving antenna 230.

[0809] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, 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.

[0810] 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, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0811] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also 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.

[0812] 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 from 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.

[0813] 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.

[0814] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0815] 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.

[0816] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0817] The transceiver 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.

[0818] The transceiver 220 (transmission processor 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.

[0819] 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 when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0820] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0821] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0822] The transceiver 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 to acquire user data, etc.

[0823] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (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.

[0824] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0825] The transceiver 220 may receive downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals. When the number of TCI states (joint TCI state / separate DL TCI state) indicated for downlink (DL) signals included in the plurality of signals differs from the number of TCI states (joint TCI state / separate UL TCI state) indicated for uplink (UL) signals included in the plurality of signals, the controller 210 may determine the TCI state to be applied to the DL signals and the TCI state to be applied to the UL signals (first and second embodiments).

[0826] The number of TCI states to be applied to the DL signal may be based on a transmission scheme to be applied to the DL signal, and the number of TCI states to be applied to the UL signal may be based on a transmission scheme to be applied to the UL signal (first and second embodiments).

[0827] The control unit 210 may determine the TCI state to be applied to the DL signal and the TCI state to be applied to the UL signal based on at least one of higher layer signaling and the DCI (first and second embodiments).

[0828] The control unit 210 may determine the number of TCI states to be applied to the DL signal and the number of TCI states to be applied to the UL signal based on a field included in the DCI (first and second embodiments).

[0829] The transceiver 220 may receive downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals. When a plurality of TCI states (joint TCI states / separate DL TCI states) are indicated for downlink (DL) channels included in the plurality of signals, the controller 210 may determine the number of TCI states to apply to the DL channels based on at least one of higher layer signaling, a specific DCI, and a specific control resource set (third, fifth, and sixth embodiments).

[0830] The DL channel may be a Physical Downlink Shared Channel (PDSCH), and the specific DCI may be a DCI that schedules the PDSCH (third embodiment).

[0831] The DL channel may be a Physical Downlink Control Channel (PDCCH), and the specific control resource set may be a control resource set corresponding to the PDCCH (fifth and sixth embodiments).

[0832] When a plurality of DL channels are transmitted, the control unit 210 may determine the correspondence between each of the indicated TCI states and each of the plurality of DL channels to be transmitted (third, fifth and sixth embodiments).

[0833] The transceiver 220 may receive downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals. When a plurality of TCI states (joint TCI states / separate UL TCI states) are indicated for uplink (UL) channels included in the plurality of signals, the controller 210 may determine the number of TCI states to apply to the UL channels based on at least one of higher layer signaling and specific DCI (fourth and seventh embodiments).

[0834] The UL channel may be a Physical Uplink Shared Channel (PUSCH), and the specific DCI may be a DCI that schedules the PUSCH (fourth embodiment).

[0835] The UL channel may be a Physical Uplink Control Channel (PUCCH). The higher layer signaling may configure the number of TCI states to be applied for each PUCCH resource (seventh embodiment).

[0836] When a plurality of UL channels are transmitted, the control unit 210 may determine the correspondence between each of the plurality of TCI states to be indicated and each of the plurality of UL channels to be transmitted (fourth and seventh embodiments).

[0837] The transceiver 220 may receive configuration information of resource sets for at least one of a sounding reference signal (SRS) and a channel state information reference signal (CSI-RS), and downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to a plurality of signals including at least one of the SRS and the CSI-RS. The control unit 210 may determine the TCI state to apply to at least one of the SRS and the CSI-RS based on the number of resource sets for the SRS and the CSI-RS (eighth and ninth embodiments).

[0838] The control unit 210 may determine to apply the indicated TCI state to at least one of the SRS and the CSI-RS based on higher layer signaling (eighth and ninth embodiments).

[0839] The control unit 210 may determine, based on higher layer signaling, to apply the indicated TCI state to at least one of the SRS and the CSI-RS for each resource set of the SRS and for each resource set of the CSI-RS (eighth and ninth embodiments).

[0840] When at least one of the SRS and the CSI-RS is transmitted multiple times, the control unit 210 may determine the correspondence between each of the indicated TCI states and each of the multiple transmitted at least one of the SRS and the CSI-RS (eighth and ninth embodiments).

[0841] (Hardware configuration) 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 also be realized by combining the single device or multiple devices with software.

[0842] 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 mentioned above, the implementation method of each is not particularly limited.

[0843] 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. Fig. 31 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.

[0844] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read 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.

[0845] 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.

[0846] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined 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.

[0847] 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), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0848] 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 realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0849] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0850] Storage 1003 is a computer-readable recording medium and may be constituted by 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, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0851] 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.

[0852] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0853] 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.

[0854] 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 such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0855] (Variation) Note that terms explained 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.

[0856] 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.

[0857] 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, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0858] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0859] 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.

[0860] 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.

[0861] 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 a subframe and a 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.

[0862] 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. However, the definition of TTI is not limited to this.

[0863] 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.

[0864] 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.

[0865] 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.

[0866] 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 equal to or greater than 1 ms.

[0867] 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 also be determined based on numerology.

[0868] 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. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0869] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0870] 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.

[0871] A Bandwidth Part (BWP), which may also be referred to as a fractional 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 given BWP and numbered within that BWP.

[0872] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0873] 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."

[0874] 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.

[0875] 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.

[0876] 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.

[0877] 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.

[0878] 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.

[0879] 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.

[0880] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, 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.

[0881] Note that the physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be called 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).

[0882] 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).

[0883] 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).

[0884] 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.

[0885] 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), then these wired and / or wireless technologies are included within the definition of transmission media.

[0886] 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).

[0887] 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.

[0888] In this 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.

[0889] 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 divided 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 term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0890] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0891] 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.

[0892] 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.

[0893] 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.

[0894] 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.

[0895] 32 is a diagram showing an example of a vehicle according to an embodiment. A 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.

[0896] 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 the user.

[0897] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., 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).

[0898] 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.

[0899] 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 (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0900] 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.

[0901] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing 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.

[0902] 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.

[0903] 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 above-mentioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 may be, for example, the above-mentioned base station 10, user terminal 20, etc. (it may function as the base station 10, user terminal 20, etc.).

[0904] 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.

[0905] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices 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)).

[0906] 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.

[0907] 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 uplink channel and downlink channel may be read as sidelink channel.

[0908] 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.

[0909] 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) and a Serving-Gateway (S-GW)), or a combination thereof.

[0910] 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 specific order presented.

[0911] 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 The present invention may be applied to systems that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0912] 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."

[0913] 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.

[0914] 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.

[0915] 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.

[0916] Also, "decision" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "decision" may be considered to be "deciding" on some action.

[0917] Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," or the like.

[0918] 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.

[0919] 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."

[0920] 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.

[0921] 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."

[0922] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0923] 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.

[0924] 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 that receives configuration information for configuring one or more sounding reference signal (SRS) resource sets and downlink control information (DCI) that indicates transmission configuration indication (TCI) states applicable to multiple types of signals including the SRS; and a control unit that, when two TCI states are indicated by the DCI, determines a TCI state to be applied to the configured SRS resource set based on the number of configured SRS resource sets among the one or more SRS resource sets; When the number of the configured SRS resource sets is one, the control unit determines, based on an upper layer parameter, whether a first TCI state of the two indicated TCI states is applied to the configured SRS resource set, or a second TCI state of the two indicated TCI states is applied to the configured SRS resource set.

2. A terminal as described in claim 1, wherein, when the number of configured SRS resource sets is two, the control unit determines that the first TCI state is applied to the first SRS resource set of the two configured SRS resource sets, and that the second TCI state is applied to the second SRS resource set of the two configured SRS resource sets.

3. A method for receiving configuration information for configuring one or more sounding reference signal (SRS) resource sets and downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to multiple types of signals including SRS; If two TCI states are indicated by the DCI, determining a TCI state to be applied to the configured SRS resource set based on the number of configured SRS resource sets among the one or more SRS resource sets; and when the number of the configured SRS resource sets is one, determining, based on a higher layer parameter, whether a first TCI state of the two indicated TCI states is applied to the configured SRS resource set or a second TCI state of the two indicated TCI states is applied to the configured SRS resource set.

4. A transmitter that transmits configuration information for configuring one or more sounding reference signal (SRS) resource sets and downlink control information (DCI) indicating transmission configuration indication (TCI) states applicable to multiple types of signals including the SRS; and a control unit that, when two TCI states are indicated by the DCI, determines a TCI state to be applied to the configured SRS resource set based on the number of configured SRS resource sets among the one or more SRS resource sets; When the number of the configured SRS resource sets is one, the control unit uses an upper layer parameter to instruct whether a first TCI state of the two indicated TCI states is to be applied to the configured SRS resource set, or a second TCI state of the two indicated TCI states is to be applied to the configured SRS resource set.

5. A system having a terminal and a base station, The terminal includes a receiving unit that receives configuration information for configuring one or more sounding reference signal (SRS) resource sets and downlink control information (DCI) that indicates a transmission configuration indication (TCI) state applicable to a plurality of types of signals including the SRS; and a control unit that, when two TCI states are indicated by the DCI, determines a TCI state to be applied to the configured SRS resource set based on the number of configured SRS resource sets among the one or more SRS resource sets; When the number of the configured SRS resource sets is one, the control unit determines, based on an upper layer parameter, whether a first TCI state of the two TCI states indicated is applied to the configured SRS resource set, or a second TCI state of the two TCI states indicated is applied to the configured SRS resource set; The base station includes a transmitter that transmits the configuration information and the DCI; a control unit that, when the two TCI states are indicated by the DCI, determines the TCI state to be applied to the configured SRS resource set based on the number of the configured SRS resource sets; When the number of the configured SRS resource sets is one, the control unit uses the upper layer parameter to indicate whether the first TCI state or the second TCI state is applied to the configured SRS resource set.

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