Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives a configuration related to coherent joint transmission (CJT); and a control unit that determines whether to apply one transmission configuration indication (TCI) state to a signal based on the CJT.

Description

Terminal, wireless communication method and base station

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

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

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

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

[0005] In future wireless communication systems (e.g., NR), it is being considered to report channel state information (CSI) based on the reception of reference signals. It is also being considered to have multiple transmission / reception points (TRPs, multi-TRP (MTRP)) or multiple panels (multiple panels, multi-panel) perform DL transmission to a terminal (user terminal, user equipment (UE)). Coherent joint transmission (CJT) using multi-TRP / multi-panel is also being considered. It is also being considered to apply CJT to cases where the connection between TRPs is not an ideal environment (e.g., a non-ideal backhaul environment).

[0006] However, the indication / setting of the transmission configuration indication (TCI) state for CJT has not been sufficiently considered, which may hinder improvements in communication quality / communication throughput.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that perform appropriate communication by utilizing the TCI state for CJT.

[0008] A terminal according to one aspect of the present disclosure has a receiving unit that receives settings related to coherent joint transmission (CJT) and a control unit that determines whether to apply one transmission configuration indication (TCI) state to a signal based on the CJT.

[0009] According to one aspect of the present disclosure, the TCI state for the CJT is utilized to provide appropriate communication.

[0010] Figure 1 shows an example of an extended unified TCI state activation / deactivation MAC CE for joint TCI states. Figure 2 shows an example of an extended unified TCI state activation / deactivation MAC CE for separate TCI states. Figure 3 shows an example of inter-TRP synchronization via CJT calibration / pre-compensation. Figure 4 shows an example of an additional extended MAC CE for joint TCI states. Figure 5 shows an example of an additional extended MAC CE for separate TCI states. Figure 6 shows an example of a mapping between TCI field code points and the first, second, third, and fourth joint TCI states. Figure 7 shows an example of a mapping between TCI field code points and the first and second joint TCI states. Figure 8 shows an example of an actual mapping between TCI field code points and the first, second, third, and fourth joint TCI states. Fig. 9 shows an example of one or more joint TCI states indicated by a TCI selection field code point. Fig. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. Fig. 11 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 12 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 13 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. Fig. 14 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (Multi-TRP) In NR, one or more transmission / reception points (Transmission / Reception Points (TRP)) (multi-TRP) 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.

[0012] Note that multiple TRPs may correspond to the same cell identifier (ID), different cell IDs, different TCI state positions / orders, different CORESET pools, or different SRS resource sets. The cell ID may be a physical cell ID (e.g., PCI) or a virtual cell ID.

[0013] In the case where only one TRP (TRP1) of the multi-TRPs transmits to the UE (which may also be called single mode, single TRP, etc.), TRP1 transmits both control signals (PDCCH) and data signals (PDSCH) to the UE.

[0014] In this disclosure, single-TRP mode may refer to a mode in which multi-TRP (mode) is not set.

[0015] In a case where only one TRP of a multi-TRP transmits a control signal to a UE and the multi-TRP transmits a data signal (which may be called a single master mode), the UE receives each PDSCH transmitted from the multi-TRP based on one piece of Downlink Control Information (DCI).

[0016] In a case where each of the multi-TRPs transmits a separate control signal to the UE and the multi-TRPs transmit data signals (which may be called a multi-master mode), a first control signal (DCI) may be transmitted on TRP1 and a second control signal (DCI) may be transmitted on TRP2. The UE receives each PDSCH transmitted from the multi-TRP based on these DCIs.

[0017] When multiple PDSCHs from multiple TRPs (which may be referred to as multiple PDSCHs) are scheduled using one DCI, the DCI may be referred to as a single DCI (S-DCI, single PDCCH). Also, when multiple PDSCHs from multiple TRPs are scheduled using multiple DCIs, these multiple DCIs may be referred to as multiple DCIs (M-DCI, multiple PDCCHs).

[0018] Each TRP in a multi-TRP may transmit a different transport block (TB) / code word (CW) / layer, or each TRP in a multi-TRP may transmit the same TB / CW / layer.

[0019] Non-Coherent Joint Transmission (NCJT) is being considered as one form of multi-TRP transmission. In NCJT, for example, TRP1 modulates and layer-maps a first codeword to transmit a first PDSCH using a first number of layers (e.g., two layers) with a first precoding. TRP2 modulates and layer-maps a second codeword to transmit a second PDSCH using a second number of layers (e.g., two layers) with a second precoding.

[0020] Note that multiple PDSCHs (multi-PDSCHs) that are non-coherent may be defined as partially or completely overlapping in time and / or frequency domains, i.e., a first PDSCH from a first TRP and a second PDSCH from a second TRP may overlap in time and / or frequency resources.

[0021] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (QCL). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0022] In URLLC for multi-TRP, it is considered that PDSCH (transport block (TB) or codeword (CW)) repetition across multi-TRP is supported. Repetition schemes (URLLC schemes, e.g., Schemes 1, 2a, 2b, 3, and 4) across multi-TRP in the frequency domain, layer (spatial) domain, or time domain are supported. In Scheme 1, multiple PDSCHs from multi-TRP are space division multiplexed (SDM). In Schemes 2a and 2b, PDSCHs from multi-TRP are frequency division multiplexed (FDM). In Scheme 2a, the redundancy version (RV) is the same for multi-TRP. In Scheme 2b, the RVs for multi-TRP may be the same or different. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexed (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted in one slot. In scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different slots.

[0023] Such a multi-TRP scenario allows for more flexible transmission control using good quality channels.

[0024] NCJT using multiple TRPs / panels may use a high rank. To support ideal and non-ideal backhaul between multiple TRPs, both single DCI (single PDCCH) and multiple DCI (multiple PDCCH) may be supported. For both single DCI and multi-DCI, the maximum number of TRPs may be two.

[0025] For single PDCCH design (mainly for ideal backhaul), TCI extension is being considered. Each TCI codepoint in the DCI may correspond to one or two TCI states. The TCI field size may be the same as that of Rel. 15.

[0026] For PDCCH / CORESET specified in Rel. 15, one TCI state without CORESETPoolIndex (also referred to as TRP Info) is set to one CORESET.

[0027] Regarding the PDCCH / CORESET enhancements specified in Rel. 16, in multi-TRP based on multi-DCI, a CORESET pool index is configured for each CORESET.

[0028] Joint Transmission (JT) may refer to simultaneous data transmission from multiple points (eg, TRPs) to a single UE.

[0029] Rel. 17 supports non-coherent joint transmission (NCJT) from two TRPs. The PDSCHs from the two TRPs may be independently precoded and independently decoded. The frequency resources may be non-overlapping, partially overlapping, or fully overlapping. When overlap occurs, the PDSCH from one TRP will interfere with the PDSCH from the other TRP.

[0030] Rel. 18 is considering supporting coherent joint transmission (CJT, mTRP CJT) using up to four TRPs. Data from the four TRPs may be coherently precoded and transmitted to the UE on the same time-frequency resource. For example, the same precoding matrix may be used to consider channels from the four TRPs. "Coherent" may mean that there is a fixed relationship between the phases of multiple received signals. Using four-TRP joint precoding, signal quality may be improved and there may be no interference between the four TRPs. Data may only be subject to interference outside the four TRPs.

[0031] In Rel. 18, a UE may receive up to four DL-RSs (e.g., TRSs) from each of up to four CJT-TRPs (TRPs #1 to #4 that support CJT).

[0032] (TCI, spatial relationship, QCL) In NR, it is considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0033] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0034] 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.

[0035] The QCL is an index indicating the statistical properties of signals / channels. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of the following parameters is the same between these different signals / channels (i.e., the QCL is true for at least one of the following parameters): Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0036] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be identified based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with sQCL (spatial QCL).

[0037] A plurality of types of QCLs (QCL types) may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same.

[0038] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0039] 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.

[0040] The TCI state may be, for example, information about the QCL between the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0041] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0042] 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)).

[0043] Furthermore, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0044] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS / PBCH block.

[0045] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0046] In the present disclosure, the following may be read interchangeably: a port (antenna port) of a signal (resource, channel) is QCL'd with an RS (DL RS, QCL source RS); there is a QCL relationship between a port of a signal and an RS; a signal is QCL'd with an RS; a signal is QCL'd with an RS in a TCI state; a signal is QCL'd with an RS in a TCI state for a specific QCL type; a signal is associated with a TCI state; a TCI state is set / indicated for a signal; and a UE assumes that a port of a signal is QCL'd with an RS in a TCI state.

[0047] In the present disclosure, beam, SD beam, spatial domain index, precoding, precoder, quasi co-location (QCL) assumption, QCL relationship, transmission configuration indicator (TCI) state, spatial domain filter, spatial domain receive filter, spatial domain transmit filter, reference signal (RS), and spatial receive parameter may be interpreted as interchangeable.

[0048] (Unified / Common TCI Framework) The unified TCI framework can control multiple types of channels / RSs (UL / DL) using a common framework. The unified TCI framework does not specify TCI states or spatial relationships for each channel as in Rel. 15. Instead, it may specify a common beam (common TCI state) and apply it to all UL and DL channels, or it may apply a common beam for UL to all UL channels and a common beam for DL ​​to all DL channels.

[0049] 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.

[0050] 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).

[0051] The default beams for UL and DL may be aligned via MAC CE based beam management (MAC CE level beam indication). The default TCI state of the PDSCH may be updated to align with the default UL beam (spatial relationship).

[0052] DCI-based beam management (DCI-level beam indication) may indicate a common beam / unified TCI state from the same TCI pool for both UL and DL (joint common TCI pool, joint TCI pool, set). X (>1) TCI states may be activated by the MAC CE. The UL / DL DCI may select one from the X active TCI states. The selected TCI state may apply to both UL and DL channels / RS.

[0053] The TCI pool (set) may be multiple TCI states configured by RRC parameters, or multiple TCI states (active TCI states, active TCI pools, sets) activated by MAC CE among the multiple TCI states configured by RRC parameters. Each TCI state may be a QCL type A / D RS. SSB, CSI-RS, or SRS may be configured as the QCL type A / D RS.

[0054] 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.

[0055] In the present disclosure, when N=M=X (X is any integer), it may mean that X TCI states (joint TCI states) common to UL and DL (corresponding to X TRPs) are notified / configured / indicated to the UE. Also, when N=X (X is any integer) and M=Y (Y may be any integer, Y=X), it may mean that X UL TCI states (corresponding to X TRPs) and Y DL TCI states (i.e., separate TCI states) (corresponding to Y TRPs) are notified / configured / indicated to the UE.

[0056] For example, when N=M=1 is written, this may mean that a TCI state common to one UL and DL for a single TRP is notified / configured / indicated to the UE (joint TCI state for a single TRP).

[0057] Also, for example, when N=1 and M=1 are written, this may mean that one UL TCI state and one DL TCI state for a single TRP are separately notified / configured / instructed to the UE (separate TCI states for a single TRP).

[0058] 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).

[0059] Also, for example, when N=2 and M=2, it may mean that multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs are notified / configured / instructed to the UE (separate TCI states for multiple TRPs).

[0060] In the above example, the values ​​of N and M are 1 or 2, but the values ​​of N and M may be 3 or more, and N and M may be different.

[0061] Support for N = M = 1 is being considered for Rel. 17. For example, it may be supported to indicate one common beam (e.g., a common beam) using RRC / MAC CE / DCI, and the common beam may be applied to multiple DL / UL channels / reference signals. Other cases may also be supported in Rel. 18 and later.

[0062] In a joint DL / UL TCI state, an RRC parameter (information element) configures multiple TCI states for both DL and UL. The MAC CE may activate multiple TCI states among the configured TCI states. The DCI may indicate one of the activated TCI states.

[0063] The DCI may be a UL DCI (e.g., a DCI used to schedule a PUSCH) or a DL DCI (e.g., a DCI used to schedule a PDSCH). The indicated TCI state may apply to at least one (or all) of the UL / DL channels / RS. One DCI may indicate both a UL TCI and a DL TCI.

[0064] The indicated single TCI state ID may be one TCI state that applies to both UL and DL, or may be two TCI states that apply to UL and DL, respectively.

[0065] 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).

[0066] In the present disclosure, higher layer parameters (RRC parameters) for setting multiple TCI states may be referred to as configuration information for setting multiple TCI states, or simply as "configuration information." Also, in the present disclosure, being instructed to set one of multiple TCI states using DCI may mean receiving indication information instructing one of the multiple TCI states included in DCI, or may simply mean receiving "instruction information."

[0067] In a separate TCI state (e.g., separate TCI (DL TCI state and UL TCI state)), 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) among the configured multiple TCI states. Separate active TCI pools for each of the UL and DL may be configured / activated.

[0068] The DL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) DL channels / RSs. The DL channels may be PDCCH / PDSCH / CSI-RS. The UE may determine the TCI state of each DL channel / RS using the TCI state behavior (TCI framework) of Rel. 16. The UL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) UL channels / RSs. The UL channels may be PUSCH / SRS / PUCCH. In this way, different DCIs may indicate UL TCI and DL DCI separately.

[0069] It is assumed that in Rel. 17 NR and later, the MAC CE / DCI supports beam activation / indication to a TCI state associated with a different physical cell identifier (PCI), and in Rel. 18 NR and later, the MAC CE / DCI supports indicating a serving cell change to a cell with a different PCI.

[0070] The application of the joint TCI state and the separate (DL / UL) TCI state may be switched. Whether the joint TCI state or the separate TCI state is applied may be configured by a higher layer parameter from the base station to the UE, or may be switched by a TCI field (TCI state ID) in the DCI.

[0071] The unified TCI framework supports the following modes 1 to 3: [Mode 1] MAC CE based TCI state indication [Mode 2] DCI based TCI state indication by DCI format 1_1 / 1_2 with DL assignment [Mode 3] DCI based TCI state indication by DCI format 1_1 / 1_2 without DL assignment

[0072] Note that the DCI in the above-mentioned mode 2 / mode 3 may be referred to as beam instruction DCI.

[0073] In the present disclosure, the terms "DCI-indicated TCI state," "indicated TCI state," "indicated TCI state," "unified TCI state," "TCI state applied to multiple types of channels / signals," "joint TCI state (for DL ​​and UL)," "DL TCI state," "UL TCI state," "Rel. 17 TCI state," "common TCI state," "single unified TCI state configured," and "single unified TCI state activated" may be read interchangeably.

[0074] In the present disclosure, the terms TCI state set by RRC parameters, configured TCI state, set TCI state, TCI state that does not conform to the unified TCI state, TCI state other than the unified TCI state, TCI state / spatial relationship set for a specific channel / signal, and individual TCI state may be read interchangeably.

[0075] The unified / common TCI state may refer to the indicated TCI state indicated using DCI / MAC CE / RRC (in Rel. 17).

[0076] The indicated TCI state may be shared with at least one of the UE-specific reception of PDSCH / PDCCH (updated using Rel. 17 DCI / MAC CE / RRC), PUSCH of dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The TCI state indicated by DCI / MAC CE / RRC may be referred to as the indicated TCI state.

[0077] If the indicated TCI state is supported (in Rel. 17), a TCI state other than the unified TCI state may refer to the TCI state configured using MAC CE / RRC (in Rel. 17) (configured TCI state).

[0078] The configured TCI state may not be shared with at least one of the UE-specific reception of PDSCH / PDCCH (updated using DCI / MAC CE / RRC in Rel. 17), PUSCH of dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The configured TCI state may be configured by RRC / MAC CE per CORESET / per resource / per resource set, and may not be updated even if the indicated TCI state is updated.

[0079] It is being considered that an indicated TCI state is applied to UE-specific channels / signals (RS), and that a UE is notified by higher layer signaling (RRC signaling) whether an indicated TCI state or a configured TCI state is applied to non-UE-specific channels / signals.

[0080] It is being considered that the RRC parameters for the configured TCI state (TCI state ID) will have the same configuration as the RRC parameters for the TCI state in Rel. 15 / 16. It is also being considered that the configured TCI state will be configured / instructed for each CORESET / resource / resource set using RRC / MAC CE. It is also being considered that the UE will determine the configuration / instruction based on specific parameters.

[0081] It is considered that the UE updates the indicated TCI state and the configured TCI state separately. For example, if the unified TCI state for the indicated TCI state is updated, the UE may not update the configured TCI state. It is also considered that the UE may determine whether to update the configured TCI state based on a specific parameter.

[0082] Furthermore, regarding the PDCCH / PDSCH, it is being considered to switch whether the indicated TCI state is applied or not applied (the configured TCI state is applied, or the TCI state configured separately from the indicated TCI state is applied) using higher layer signaling (RRC / MAC CE).

[0083] In addition, with regard to intra-cell beam indication (TCI state indication), it is being considered to support indication TCI state for UE-specific CORESET and PDSCH associated with that CORESET, and non-UE-specific CORESET and PDSCH associated with that CORESET.

[0084] In addition, for inter-cell beam indication (e.g., L1 / L2 inter-cell mobility), it is being considered that indication TCI status will be supported for a UE-specific CORESET and the PDSCH associated with that CORESET.

[0085] In Rel. 15, whether to indicate the TCI state for CORESET #0 was up to the implementation of the base station. In Rel. 15, for CORESET #0 for which a TCI state is indicated, the indicated TCI state is applied. For CORESET #0 for which a TCI state is not indicated, the SSB and QCL selected at the time of the latest (most recent) PRACH transmission are applied.

[0086] In the unified TCI state framework for Rel. 17 and later, the TCI state for CORESET #0 is being considered.

[0087] For example, in the unified TCI state framework of Rel. 17 and later, whether or not to apply the indicated Rel. 17 TCI state associated with the serving cell for the TCI state indication of CORESET #0 (of Rel. 17) is configured by RRC for each CORESET, and if not applied, the legacy MAC CE / RACH signaling mechanism may be used.

[0088] In addition, in Rel. 17, the CSI-RS related to the TCI state applied to CORESET #0 may be QCL'd with the SSB related to the serving cell PCI (physical cell ID) (similar to Rel. 15).

[0089] For CORESET #0, a CORESET with a common search space (CSS), and a CORESET with a CSS and a UE-specific search space (USS), whether to follow the indicated TCI state may be configured for each CORESET by an RRC parameter. If the indicated TCI state is not configured for that CORESET, the configured TCI state may be applied to that CORESET.

[0090] For non-UE-dedicated channels / RSs (except CORESET), whether to follow the indicated TCI state may be configured for each channel / resource / resource set by an RRC parameter. If the indicated TCI state is not configured for that channel / resource / resource set, the configured TCI state may be applied to that channel / resource / resource set.

[0091] Antenna Port QCL: Physical Layer Procedures for Data / Physical Downlink Shared Channel Association Procedures / UE Procedures for Receiving the Physical Uplink Shared Channel A UE can configure a list of up to M TCI-States in the higher layer parameter PDSCH-Config for decoding PDSCH according to the detected PDCCH with DCI for the UE and a given serving cell, where M depends on the UE capability maxNumberConfiguredTCIstatesPerCC. Each TCI-State includes parameters for configuring the QCL relationship between one or two downlink reference signals and the DM-RS port of the PDSCH, the DM-RS port of the PDCCH, or the CSI-RS port of the CSI-RS resource. The QCL relationship is configured by the higher layer parameter qcl-Type1 for the first DL RS and the higher layer parameter qcl-Type2 for the second DL RS (if configured). In the case of two DL RSs, the QCL type is not the same, regardless of whether the references are to the same DL RS or different DL RSs. The QCL type corresponding to each DL RS is given by the higher layer parameter qcl-Type in QCL-Info and may take one of the following values: ◆ 'typeA': {Doppler shift, Doppler spread, mean delay, delay spread} ◆ 'typeB': {Doppler shift, Doppler spread} ◆ 'typeC': {Doppler shift, mean delay} ◆ 'typeD': {Spatial Rx parameters}

[0092] In order to provide reference signals for PDSCH DMRS and PDCCH DMRS and CSI-RS within a CC, and further to provide a reference for determining the UL TX (transmission) spatial filter for dynamic grant and configuration grant-based PUSCH and PUCCH resources and SRS within a CC, if such a filter is available, the UE can configure a list of up to 128 DLorJointTCIState settings within PDSCH-Config.

[0093] If there is no TCI state (DL or joint TCI state (TCI-State) or UL TCI state (TCI-UL-State)) configured in the BWP in that CC, the UE may apply the TCI-State or TCI-UL-State configuration from the reference BWP of the reference CC. If the UE has dl-OrJointTCI-StateList or TCI-UL-State configured in any CC in the same band, it does not expect tci-StatesToAddModList (TCI state list for adding modifications), SpatialRelationInfo (spatial relation information), or PUCCH-SpatialRelationInfo (PUCCH spatial relation information) to be configured in that band, except for SpatialRelationInfoPos (spatial relation information for position). The UE can assume that if the UE has TCI-State configured in any CC in its CC list by simultaneousTCI-UpdateList1-r16 (simultaneous TCI update list 1), simultaneousTCI-UpdateList2-r16 (simultaneous TCI update list 2), simultaneousSpatial-UpdatedList1-r16 (simultaneous spatial update list 1), or simultaneousSpatial-UpdatedList2-r16 (simultaneous spatial update list 2), the UE does not have dl-OrJointTCI-StateList or TCI-UL-State configured in any CC in the same band in its CC list.

[0094] The UE receives an activation command used to map up to eight TCI states and / or up to eight TCI state pairs, with one TCI state for DL ​​channels / signals and / or one TCI state for UL channels / signals, to codepoints of the DCI field 'Transmission Configuration Indication' for one or a set of CCs / DL BWPs and, if applicable, one or a set of CCs / UL BWPs, as described in TCI States Activation / Deactivation for UE-specific PDSCH MAC CE or Unified TCI States Activation / Deactivation MAC CE in the MAC protocol specification.

[0095] For a set of CCs / DL BWPs and, if applicable, a set of CCs / UL BWPs, a set of TCI State IDs is activated, and if the applicable list of CCs is determined by the CCs indicated in the activation command, the same set of TCI State IDs applies to all DL and / or UL BWPs within the indicated CC.

[0096] If the activation command maps a TCI state (at least one of TCI-State and TCI-UL-State) to only one code point, and the indicated mapping for that single TCI code point is applied as described in the Requirements for Radio Resource Management (RRM) Support (MAC CE-based DL TCI State Switching Delay / MAC CE-based UL TCI State Switching Delay), the UE applies the indicated TCI state (at least one of TCI-State and TCI-UL-State) to one or a set of CCs / DL BWPs and, if applicable, to one or a set of CCs / UL BWPs.

[0097] If the bwp-id or cell for a QCL type A / D source RS in the QCL-Info of a TCI state is not configured, the UE shall assume that the QCL type A / D source RS is configured in the CC / DL BWP to which the TCI state applies.

[0098] If the TCI field is configured to be present in the DCI for CORESET (tci-PresentInDCI set to 'enabled' or tci-PresentDCI-1-2 set), a UE configured with a DL or joint TCI state list (dl-OrJointTCI-StateList) with an activated TCI state (TCI-State or TCI-UL-State) receives DCI format 1_1 / 1_2 that provides an indication of the TCI state (at least one of TCI-State and TCI-UL-State) for one CC or for all CCs in the same CC list configured by the simultaneous unified TCI update list (simultaneousU-TCI-UpdateList1-r17, simultaneousU-TCI-UpdateList2-r17, simultaneousU-TCI-UpdateList3-r17, simultaneousU-TCI-UpdateList4-r17). The DCI format 1_1 / 1_2 may be accompanied by a DL assignment if one is available, or may not be accompanied by a DL assignment.

[0099] If DCI format 1_1 / 1_2 does not carry a DL assignment, the UE can assume (verify): ◆ The CS-RNTI is used to scramble the CRC for that DCI. ◆ The values ​​of the DCI fields (special fields) are set as follows: - ◆ The redundancy version (RV) field is all '1's. - ◆ The modulation and coding scheme (MCS) field is all '1's. - ◆ The new data indicator (NDI) field is 0. - ◆ The frequency domain resource assignment (FDRA) field is all '0's for FDRA type 0, or all '1's for FDRA type 1, or all '0's for Dynamic Switch (similar to the validation of the PDCCH for the release of DL semi-persistent scheduling (SPS) or UL grant type 2 scheduling).

[0100] If a UE receives a higher layer configuration of dl-OrJointTCI-StateList with a single TCI-State that can be used as the indication TCI state, the UE derives QCL assumptions from the configured TCI states for the PDSCH DM-RS, PDCCH DM-RS, and CSI-RS that apply to that indication TCI state.

[0101] If the UE receives higher layer configuration of dl-OrJointTCI-StateList with a single TCI-State or a single TCI-UL-State that can be used as the indicated TCI state, the UE determines the UL TX spatial filter, if applicable, from the configured TCI state for dynamic and configured grant-based PUSCH, PUCCH and SRS that apply to the indicated TCI state.

[0102] When a UE configured with a list of DL or joint TCI states (dl-OrJointTCI-StateList) attempts to transmit a PUCCH with a positive HARQ-ACK or a PUSCH with a positive HARQ-ACK corresponding to a DCI that transmits a TCI state indication and does not have a DL assignment, or corresponding to a PDSCH scheduled by a DCI that transmits a TCI state indication, and the indicated TCI state is different from a previously indicated indicated TCI state, the indicated TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State) will start to be applied from the first slot (beam application timing 1) that is at least beamAppTime symbols (beam application time (BAT)) after the last symbol of that PUCCH or that PUSCH. Both the first slot and the beamAppTime symbols are determined on the active BWP with the smallest SCS among the BWPs from the CC that applies the indicated TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State) that is active at the end of the PUCCH or the PUSCH that transmits the positive HARQ-ACK.

[0103] [DCI Format 1_1: Multiplexing and Channel Coding / Downlink Transport Channel and Control Information / Downlink Control Information / DCI Format] In Rel. 15 / 16, if a UE does not support active BWP changes via DCI, the UE ignores the BWP indicator field. A similar behavior is also considered for the relationship between support for the Rel. 17 TCI state and the interpretation of the TCI field. It is considered that if a UE is configured with the Rel. 17 TCI state, the TCI field will always be present in DCI format 1_1 / 1_2, and if the UE does not support TCI updates via DCI, the UE will ignore the TCI field.

[0104] In Rel. 15 / 16, whether or not a TCI field is present (TCI presence information in DCI, tci-PresentInDCI) is set for each CORESET.

[0105] The TCI field in DCI format 1_1 is 0-bit if the higher layer parameter tci-PresentInDCI is not enabled, and 3-bit otherwise. If the BWP indicator field indicates a BWP other than the active BWP, the UE shall follow the following behavior: [Behavior] If the higher layer parameter tci-PresentInDCI is not enabled for the CORESET used for the PDCCH carrying that DCI format 1_1, the UE shall assume that tci-PresentInDCI is not enabled for all CORESETs in the indicated BWP; otherwise, the UE shall assume that tci-PresentInDCI is enabled for all CORESETs in the indicated BWP.

[0106] The TCI field in DCI format 1_2 is 0 bit if the upper layer parameter tci-PresentInDCI-1-2 is not set, otherwise it is 1, 2 or 3 bits determined by the upper layer parameter tci-PresentInDCI-1-2. If the BWP indicator field indicates a BWP other than the active BWP, the UE shall follow the following behavior: [Behavior] If the higher layer parameter tci-PresentInDCI-1-2 is not set for the CORESET used for the PDCCH carrying that DCI format 1_2, the UE shall assume that tci-PresentInDCI is not enabled for all CORESETs within the indicated BWP, otherwise the UE shall assume that tci-PresentInDCI-1-2 for all CORESETs within the indicated BWP is set with the same value as tci-PresentInDCI-1-2 set for the CORESET used for the PDCCH carrying that DCI format 1_2.

[0107] A TCI status ID indicating the joint DL / UL TCI status is associated with the value of the TCI field for indicating the joint DL / UL TCI status.

[0108] At least one TCI state ID, a TCI state ID indicating a TCI state for only DL and a TCI state ID indicating a TCI state for only UL, is associated with a value of the TCI field for separate DL / UL TCI state indication. For example, the TCI field values ​​000 to 001 are associated with only one TCI state ID for DL, the TCI field values ​​010 to 011 are associated with only one TCI state ID for UL, and the TCI field values ​​100 to 111 are associated with both one TCI state ID for DL ​​and one TCI state ID for UL.

[0109] Channels / RSs to which the indicated TCI state applies The indicated TCI state by the MAC CE / DCI may apply to the following channels / RSs:

[0110] [PDCCH] - If followUnifiedTCIState is configured for CORESET0, the indicated TCI state applies. Otherwise, the Rel. 15 specifications apply for that CORESET. That is, CORESET0 follows the TCI state activated by the MAC CE or is QCL'd with SSB. - For CORESETs with USS / CSS type 3 and index other than 0, the indicated TCI state always applies. - For CORESETs with index other than 0 and at least CSS type other than 3, if followUnifiedTCIState is configured, the indicated TCI state applies. Otherwise, the configured TCI state for that CORESET applies to that CORESET.

[0111] [PDSCH] - The indicated TCI state always applies to all UE-dedicated PDSCHs. - For non-UE-dedicated PDSCHs (PDSCHs scheduled by DCI in CSS), the indicated TCI state may apply if followUnifiedTCIState is set (for the CORESET of the PDCCH that schedules that PDSCH). Otherwise, the configured TCI state for that PDSCH applies to that PDSCH. If followUnifiedTCIState is not set for a PDSCH, whether a non-UE-dedicated PDSCH follows the indicated TCI state may depend on whether followUnifiedTCIState is set for the CORESET used to schedule that PDSCH.

[0112] [CSI-RS] For an A-CSI-RS for CSI acquisition or beam management, if followUnifiedTCIState is set (for CORESET of the PDCCH that triggers that A-CSI-RS), the indicated TCI state applies. For other CSI-RSs, the configured TCI state for that CSI-RS applies.

[0113] [PUCCH] - For all dedicated PUCCH resources, the indicated TCI state always applies.

[0114] [PUSCH] - For dynamic / configured grant PUSCH, the indication TCI state always applies.

[0115] [SRS] - When the SRS resource set for the A-SRS used for beam management and the A / SP / P-SRS used for codebook (CB) / non-codebook (NCB) / antenna switching is configured to follow the unified TCI state, the indicated TCI state is applied. For other SRSs, the configured TCI state in the SRS resource set is applied.

[0116] In the present disclosure, the terms "indicated TCI state," "unified TCI state," "TCI state applied to channels / signals configured to follow the unified TCI state," "TCI state applied to a UE-specific PDSCH and a CORESET / PDCCH associated with a USS," and "TCI state applied to a PUCCH and a PUSCH" may be interchangeable.

[0117] (PDSCH QCL Assumptions) The QCL assumptions for the regular PDSCH when the Rel. 17 unified TCI state is configured are Type A / D with TRS, or Type A with TRS and Type D with CSI-RS with repetition.

[0118] The QCL assumptions for normal PDSCH with and without the Rel. 17 unified TCI state are Type A / D with TRS, or Type A with TRS and Type D with CSI-RS with repetition, or Type A / D with no TRS.

[0119] The QCL assumption for the SFN PDSCH when two TCI states (associated with two DL-RS) are indicated is one of the following assumptions: ◆ SFN Scheme A (sfnSchemeA): both of the two DL-RS. ◆ SFN Scheme B (sfnSchemeB): both of the two DL-RS, except for the QCL parameters {Doppler shift, Doppler spread} of the second TCI state.

[0120] The QCL assumptions for the CJT PDSCH when two TCI states (associated with two DL-RS) are indicated are as follows: ◆ CJT Scheme A (cjtSchemeA): both of the two DL-RS ◆ CJT Scheme B (cjtSchemeB): both of the two DL-RS except for the QCL parameters {Doppler shift, Doppler spread} of the second TCI state.

[0121] (TCI indication in Rel. 18 NR) The TCI state configuration by RRC is based on the following: ◆ Up to 128 TCI states can be configured for one serving cell. In coordination between multiple TRPs with different PCIs, multiple TCI states can be associated with SSBs of different PCIs, and up to 8 PCIs can be configured.

[0122] Activation of TCI states by the MAC CE is based on the following: ◆ In single-TRP transmission, up to eight TCI states can be activated for one serving cell or one BWP of one serving cell. ◆ In switching between multiple TRPs with different PCIs, multiple activated TCI states can be associated with SSBs of different PCIs, and TCI states of up to eight PCIs can be activated. ◆ In multi-TRP joint transmission, up to eight TCI states can be activated per TRP / cell, and up to 16 TCI states can be activated in total. ◆ In joint transmission using multiple TRPs with different PCIs, multiple activated TCI states can be associated with SSBs of different PCIs, and TCI states of up to two PCIs can be activated.

[0123] The indication of the TCI state by the DCI is based on the following: ◆ Multiple code points in the TCI indication field in the DCI are mapped to multiple TCI states activated via the MAC CE. ◆ In single-TRP transmission, one code point in the TCI indication field in the DCI is mapped to one joint DL and UL TCI, or one DL TCI and one UL TCI, or one DL TCI, or one UL TCI. ◆ In single-DCI-based multi-TRP joint transmission, one code point in the TCI indication field in the DCI is mapped to one or two joint DL and UL TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs. In multi-DCI-based multi-TRP joint transmission, one code point in the TCI indication field in the DCI is mapped to one or two DL and UL joint TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs. Multiple DCIs indicate the TCI status for multiple TRPs.

[0124] In Rel. 18, the unified TCI state for single TRP (sTRP) is extended to support multi-TRP (mTRP) in Rel. 16-18 as follows: ◆ mTRP based on single DCI (sDCI): - ◆ Rel. 16 sDCI mTRP PDSCH (NCJT, repetition) - ◆ Rel. 17 sDCI mTRP PUSCH / PUCCH / PDCCH repetition - ◆ Rel. 17 SFN-PDCCH / PDSCH - ◆ Rel. 18 PDSCH-CJT - ◆ Rel. 18 sDCI simultaneous transmission with multiple panels (STxMP) PUSCH / PUCCH ◆ mTRP based on multi-DCI (mDCI): - ◆ Rel. 16 mDCI mTRP PDSCH (NCJT) -◆Rel. 18 mDCI STxMP PUSCH / PUCCH

[0125] In the Rel. 18 unified TCI framework, the following are assumed: ◆ RRC-based switching between joint TCI states and separate UL and DL TCI states ◆ RRC-configured TI state lists are common across multiple TRPs ◆ Both CC-specific and CC-common TCI pools in Rel. 17 are supported ◆ TCI state ID indication based on MAC CE / DCI in the CC list in Rel. 17 is reused ◆ Beam adaptation timing (BAT) in Rel. 17 is reused

[0126] In the sDCI mTRP, one DCI / MAC CE indicates a joint TCI state or up to two sets of UL and DL TCI states. The indication may be based on:

[0127] ◆ The TCI field in DCI format 1_2 / 1_2 (with or without DL assignment) indicates at least one TCI state, the first and the second. If only one TCI state (e.g., the second TCI state) is indicated, the UE updates the indicated TCI state and maintains the other TCI state (e.g., the first TCI state). If two TCI states are indicated, the UE updates both TCI states.

[0128] ◆ Once two TCI states are indicated, the UE maintains the two indicated TCI states. However, this does not mean that both of the two indicated TCI states are always applied to all channels / RSs. Which of the indicated TCI states applies to each channel / RS is defined in the specification, configured by RRC, or indicated by DCI.

[0129] In the mDCI mTRP, the PDSCH scheduled / activated by DCI format 1_1 / 1_2 may be based on the following:

[0130] ◆ A new 2-bit TCI selection ("TCI selection") field in scheduling / activation DCI format 1_1 / 1_2 can indicate which one or two indicated TCI states will be applied to the scheduled / activated PDSCH. This enables dynamic switching between sTRP PDSCH and mTRP PDSCH by the scheduling / activation DCI. The values ​​00, 01, 10, and 11 of the TCI selection field correspond to the first TCI state, the second TCI state, the first and second TCI states, and a reserved value, respectively. For example, if the TCI selection field indicates 00, the sTRP PDSCH using the first TCI state is scheduled / activated.

[0131] However, this TCI selection operation requires the UE to buffer two beams before the end of DCI decoding in FR2, since the UE does not know the value of the TCI selection field before DCI decoding. This TCI selection operation is applicable when reporting UE capability of two default beams in FR2, or when there is no UE capability of two default beams in sDCI mTRP in FR2 and the scheduling offset is greater than the threshold timeDurationForQCL, or when in FR1.

[0132] For PDSCHs scheduled / activated by DCI format 1_0 / 1_1 / 1_2, if the scheduling offset is less than or equal to the threshold timeDurationForQCL and the UE does not support the two default TCI states in the sDCI mTRP in FR2, the first TCI state is always applied.

[0133] In the sDCI mTRP, the application of the indicated TCI state may be based on the following: ◆ Application to the PDCCH may be based on the following: ◆ If followUnifiedTCIState is set for CORESET0, applyIndicatedTCIState={1st TCI state, 2nd TCI state, both} is set for each CORESET to indicate which indicated TCI state is applied. Otherwise, the Rel. 15 specification is applied for that CORESET. That is, CORESET0 follows the TCI state activated by the MAC CE or is QCL'd with SSB. "Both" does not apply to CORESET0 with SearchSpace0 for CSS set of type 0 / 0A / 2. -◆ For CORESETs with index other than 0 and with USS / CSS type 3, applyIndicatedTCIState={1st TCI state, 2nd TCI state, both} is set for each CORESET to indicate which indicated TCI state applies. -◆ For CORESETs with index other than 0 and with at least CSS type other than 3, if configured to follow the unified TCI state, applyIndicatedTCIState={1st TCI state, 2nd TCI state, both} is set for each CORESET to indicate which indicated TCI state applies. Otherwise, the configured TCI state for that CORESET applies to that CORESET.

[0134] ◆ One or two indication TCI states are always applied to a PDSCH. The application to a PDSCH may be based on the following: ◆ For a PDSCH scheduled / activated by DCI format 1_1 / 1_2, the 2-bit TCI selection field in DCI format 1_1 / 1_2 of the scheduling / activation can indicate which indication TCI state (first TCI state, second TCI state, both) applies. If the TCI selection field is not set, both indication TCI states apply. ◆ For a PDSCH scheduled / activated by DCI format 1_0, which indication TCI state (first TCI state, second TCI state, both) applies is configured by RRC. ◆ If PDSCH-CJT (CJT-PDSCH) or PDSCH-SFN (SFN-PDSCH) is configured, only both indication TCI states can be configured.

[0135] ◆ Application to CSI-RS may be based on the following: ◆ If followUnifiedTCIState is set for an A-CSI-RS for CSI acquisition or beam management (for the CORESET of the PDCCH that triggers that A-CSI-RS), applyIndicatedTCIState={first TCI state, second TCI state, both} is set for each CSI-RS resource set or CSI-RS resource to indicate which indicated TCI state applies. For other CSI-RSs, the configured TCI state for that CSI-RS applies.

[0136] In the sDCI mTRP, the TCI state indication for the PDSCH-CJT may be based on the following: ◆ One or two indicated joint TCI states are applied to the PDSCH-CJT (across up to four TRPs). Up to four TRPs share the same one or two TCI states (QCL source RSs of TRS / CSI-RS). ◆ The following two schemes are supported: ◆ CJT Scheme A (cjtSchemeA): The PDSCH DM-RS port is QCL'd with multiple DL-RSs of both indicated TCI states for QCL type A. ◆ CJT Scheme B (cjtSchemeB): The PDSCH DM-RS port is QCL'd with multiple DL-RSs of both indicated TCI states for QCL type A, except for the QCL parameters (Doppler shift, Doppler spread) of the second indicated joint TCI state.

[0137] Figure 1 shows an example of an Enhanced Unified TCI States Activation / Deactivation MAC CE for Joint TCI States. This MAC CE consists of the following fields and has a variable size: ◆ Serving Cell ID: This field indicates the ID of the serving cell to which the MAC CE applies. ◆ DL BWP ID: This field indicates the DL BWP to which the MAC CE applies as a code point of the BWP indicator field. ◆ F i,j : This field indicates whether the j-th joint TCI state exists for the TCI State ID field associated with codepoint i of the DCI TCI field, where j=1, 2. If F i,j If the field is set to 1, it indicates that the jth joint TCI state for codepoint i exists. If F i,jIf the field is set to 0, it indicates that there is no jth joint TCI state for codepoint i. The codepoint to which a TCI state is mapped is determined by its ordinal position among all TCI state ID fields. ◆ R: Reserved bit set to 0.

[0138] Figure 2 shows an example of an Enhanced Unified TCI States Activation / Deactivation MAC CE for Separate TCI States. This MAC CE consists of the following fields and has a variable size: ◆ Serving Cell ID: This field indicates the ID of the serving cell to which the MAC CE applies. ◆ DL BWP ID: This field indicates the DL BWP to which the MAC CE applies as a code point in the BWP indicator field. ◆ UL BWP ID: This field indicates the UL BWP to which the MAC CE applies as a code point in the BWP indicator field. ◆ F i,j : This field indicates whether the j-th DL TCI state exists for the TCI State ID field associated with codepoint i of the DCI TCI field, where j=1, 2. If F i,j If the field is set to 1, it indicates that the jth DL TCI state for codepoint i exists. If F i,j If the field is set to 0, it indicates that the jth DL TCI state for codepoint i does not exist. i,j: This field indicates the TCI state identified by TCI-StateId. If the indicated TCI state ID is a DL TCI state, a 7-bit long TCI state ID, i.e., TCI-StateId, is used. If the indicated TCI state ID is a UL TCI state, the most significant bit (MSB) of the TCI state ID is considered a reserved bit, and the remaining 6 bits indicate TCI-UL-StateId. The TCI state ID is i,j and S i,j The code points to which a TCI state is mapped are determined by its ordinal position among all TCI State ID fields. The maximum number of activated TCI states is 32. ◆ R: Reserved bit set to 0.

[0139] (CJT Calibration) Rel. 19 considers performing CJT not only in an ideal environment where there is no delay (time), Doppler (frequency), or phase difference between TRPs, but also in a non-ideal environment (non-ideal backhaul) where there is a delay, Doppler, or phase difference between TRPs, and measuring and reporting the time difference and frequency / phase offset between TRPs. As shown in Figure 3, a mechanism may be supported in which the UE measures the delay, Doppler, or phase difference (e.g., offset) between TRPs and reports it to the base station, and the base station calibrates / precompensates for the difference (e.g., UE-assisted calibration). Precompensation may be applied to up to three TRPs. In UE-assisted calibration, to perform CJT in a situation where the signals / channels between TRPs are not synchronized, precompensation may be applied to at least one of the following to synchronize the signals / channels between TRPs: ◆ CJT PDSCH. ◆NZP-CSI-RS for CJT CSI codebook reporting.

[0140] When both the delay (time) offset and frequency offset are precompensated for the CJT-PDSCH and the NZP CSI-RS for the CJT CSI codebook, there may be cases where it is not necessary to indicate two TCI states (only one TCI state is sufficient for the QCL assumption of the CJT-PDSCH).

[0141] Assuming up to four CJT TRPs, it is considered beneficial to consider up to four TCI states for the QCL estimation of the CJT-PDSCH.

[0142] However, the TCI status indication for CJT has not been fully considered, and if such an indication method is not fully considered, there is a risk of a decrease in communication quality / throughput.

[0143] Therefore, the present inventors have conceived a method for indicating the TCI state for the CJT.

[0144] 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.

[0145] (Various Reinterpretations) In the present disclosure, a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Furthermore, in the present disclosure, a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding (ignoring) the word in the meaning of the entire sentence. Note that "( )" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0146] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0147] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0148] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0149] 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, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0150] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0151] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0152] In the present disclosure, ceil(x), ceiling function, and ceiling function may be interchangeable. In the present disclosure, floor(x), floor function, and floor function may be interchangeable. In the present disclosure, sqrt(x), square root of x, and root x may be interchangeable. In the present disclosure, x mod y, mod(x, y), mod function, and modulo operation may be interchangeable. In the present disclosure, Σ i=M M＋N－1 f(i), Σ i=M M+N-1 f i , f(i) or f for i = M, M+1, ..., M+N-1 i Summation of f(M) + f(M+1) + ... + f(M+N-1), f M +f M＋1 +...+f M＋N－1 , may be read interchangeably. C(n, k) is the number of combinations of k values ​​selected from n values ​​(combinatorial coefficient), binomial coefficients, n Ck , C n k In the present disclosure, x / y and floor(x / y) may be read as interchangeable.

[0153] In this disclosure, A b , A_b, Ab, and A with b added to the bottom right may be read interchangeably. c , A^c, and the notation of A with c added to the upper right may be read interchangeably. b c , A_b^c, and the notation in which b is added to the bottom right of A and c is added to the top right of A may be read interchangeably. ～ may be expressed by adding 〜 to the x, or may be referred to as x tilde. － may be represented by placing a minus sign (-) on top of the x, or may be referred to as an x-bar. ＾ may be represented by placing a ^ above the x, and may be called an x-hat.

[0154] In the present disclosure, FR may be, for example, at least one of FR1, FR2, FR2-1, FR2-2, FR3, sub-terahertz, and terahertz. In the present disclosure, the frequency range corresponding to FR1 may be 410-7125 MHz. In the present disclosure, FR2 may include FR2-1 and FR2-2, and the frequency range corresponding to FR2-1 may be 24250-52600 MHz, and the frequency range corresponding to FR2-1 may be 52600-71000 MHz.

[0155] In this disclosure, the following abbreviations may be used: FDM: frequency division multiplexing TDM: time division multiplexing

[0156] In the present disclosure, the terms indicate, report, and select may be read interchangeably.

[0157] In the present disclosure, the terms TRP, CMR, NZP CSI-RS resource, NZP CSI-RS resource set, group of multiple NZP CSI-RS resources (multiple NZP CSI-RS resources), group of multiple NZP CSI-RS resource sets (multiple NZP CSI-RS resource sets), panel, group, set, CRI, resource, CSI-RS, TRS, and NZP CSI-RS resource set with TRS information (TRS-Info) may be interchangeable. In each embodiment, the terms CMR group / set, NZP CSI-RS resource group / set, and CRI group / set may be interchangeable.

[0158] In the present disclosure, a certain NZP-CSI-RS resource may correspond to a certain TRP, i.e., the NZP-CSI-RS resource and the TRP may be associated with each other.

[0159] In the present disclosure, DL-RS resources, NZP-CSI-RS resources, TRS resources, resources, and RS resources may be read interchangeably.

[0160] In the present disclosure, per resource, resource unit, per TRP, and TRP unit may be read interchangeably.

[0161] In the present disclosure, the terms resource and resource set may be read interchangeably.

[0162] In the present disclosure, frequency, Doppler shift, and Doppler may be read interchangeably.

[0163] In the present disclosure, the terms report amount, report content, report type, and type of report content may be read interchangeably.

[0164] In the present disclosure, UE-assisted CJT calibration, CJT calibration, CSI reporting for CJT calibration, CJT CSI, and CJT CSI reporting may be read interchangeably.

[0165] In the present disclosure, the enhancement of UE reporting for CJT / DL-multi-TRP deployment with non-ideal synchronization and backhaul may be interchangeably read as "a case of a UE configured with new UE reporting for CJT / DL-multi-TRP deployment with non-ideal synchronization and backhaul" or "a case of a UE supporting new UE reporting for CJT / DL-multi-TRP deployment with non-ideal synchronization and backhaul." In other words, in the present disclosure, the case in which the enhanced UE reporting is applied may be interchangeably read as a case in which new UE reporting is configured for the UE or a case in which the UE supports new UE reporting.

[0166] In the present disclosure, CJT-PDSCH, CJT PDSCH, and PDSCH-CJT may be read interchangeably.

[0167] In the present disclosure, the CJT CSI codebook, the codebook for CJT, the extended type 2 codebook for CJT, and the additional extended type 2 port selection codebook for CJT may be read interchangeably.

[0168] In the present disclosure, delay, time, phase, frequency, and Doppler shift may be read interchangeably.

[0169] In the present disclosure, the terms TCI field, TCI field value, TCI field code point, TCI code point, and TCI indication may be interchangeable. In the present disclosure, the terms TCI selection field and TCI selection indication may be interchangeable.

[0170] (Wireless communication method) <Embodiment 1> In a case where pre-compensation of at least one of delay offset and frequency offset is assumed (pre-compensation is applied) for at least one of CJT PDSCH and CJT PDSCH DMRS, even if mTRP TCI state indication (TCI selection) is configured, only one TCI state may be considered / applied as a QCL assumption (the UE may not expect / assume that more than one TCI state will be configured / instructed).

[0171] According to embodiment 1, if pre-compensation is performed, the UE does not need to consider redundant QCL assumptions.

[0172] Embodiment 1 may be based on at least one of the following options:

[0173] ◆ Option 1: The “case in which pre-compensation of at least one of delay offset and frequency offset is assumed” in the first embodiment may be determined based on at least one information / setting / state among several options 1-x below:

[0174] - Option 1-1: Is reporting of at least one of the new (e.g., Rel. 19) delay and frequency offsets configured? For example, this is the case when both delay offset reporting and frequency offset reporting are configured.

[0175] ◆ Option 1-2: Whether time / frequency / phase offset pre-compensation is applied to PDSCH transmission. For example, in this case, if time offset reporting is configured, the UE assumes that time offset pre-compensation is applied to the PDSCH (or the UE assumes one QCL assumption according to "one TCI state" in Option 3 described later). For example, if the UE reports a time offset report at time t, the UE assumes that time offset pre-compensation is applied to the PDSCH from X time units after the report to Y time units after the report (or the UE assumes one QCL assumption according to "one TCI state" in Option 3 described later). At least one of X and Y may be defined in the specification, configured by the RRC, or dependent on the UE capabilities.

[0176] -◆Option 1-3: Is CJT CSI codebook reporting configured?

[0177] -◆Option 1-4: Is the same pre-configuration configured / applied to the CJT PDSCH and the CSI-RS resources configured for CJT CSI codebook reporting?

[0178] - Option 1-5: The UE reports offsets that do not exceed the time / frequency / phase thresholds. The thresholds may be defined in the specifications or may be determined based on the "Notification of Information to the UE" section below.

[0179] -◆Option 1-6: Does the NW / gNB notify the UE of the pre-compensated offset value?

[0180] - ◆ At least one of the above options 1-x may take into account information from the NW described in "Notifying Information to UE" below.

[0181] - The information / settings / state may or may not be associated with a TCI state. If the information / settings / state is associated with a TCI state, the setting of each TCI state may set the information / settings / state. If the information / settings / state is not associated with a TCI state, the information / settings / state may be independent of the setting of the TCI state.

[0182] - The information / settings / state may be applied to the first TCI state, the second TCI state, or both TCI states.

[0183] ◆ Option 2: The "case where mTRP TCI status indication is set" in embodiment 1 may be determined based on information / settings / status of at least one of the following several options 2-x:

[0184] - Option 2-1: Whether the TCI selection field is set (whether tciSelection-PresentInDCI is set). For example, this case is when tciSelection-PresentInDCI is set.

[0185] - Option 2-2: At least one of RRC configuration, DL MAC CE indication, and DCI indication from other Rel. 19 or later.

[0186] ◆ Option 3: The "one TCI state" in embodiment 1 may be at least one of the following several options 3-x: - ◆ Option 3-1: The first TCI state. - ◆ Option 3-2: The second TCI state. - ◆ Option 3-3: A TCI state that is explicitly set (without using a DCI indication).

[0187] ◆ Option 4: The selection of "one TCI state" in embodiment 1 may be based on "Application of each embodiment" described later. For example, the selection of "one TCI state" in embodiment 1 may be based on at least one of several options 4-x below: - ◆ Option 4-1: Rules defined in the specification. - ◆ Option 4-2: RRC configuration. - ◆ Option 4-3: At least one indication of DL MAC CE and DCI. For example, the TCI selection field.

[0188] Second Embodiment More than two TCI states may be indicated by the DCI.

[0189] According to embodiment 2, in CJT-PDSCH, QCL assumptions for each TRP can be taken into account.

[0190] Embodiment 2 may be based on at least one of the following options:

[0191] Option 1: The indication method for more than two TCI states is based on at least one of the following several options 1-x:

[0192] -◆ Option 1-1: An additional enhanced MAC CE (or an extended MAC CE) that is an extension of at least one of the Enhanced Unified TCI States Activation / Deactivation MAC CE for Joint TCI States and the Enhanced Unified TCI States Activation / Deactivation MAC CE for Separate TCI States is used for indication. The additional enhanced MAC CE may be based on some of the following extensions: -◆ The maximum number of octets in the additional enhanced MAC CE for joint TCI states may be 5 or more. The maximum number of octets in the additional enhanced MAC CE for separate TCI states may be 10 or more. The maximum number of TCI state ID fields N in the additional extended MAC CE for joint TCI states (F i,j In the additional enhanced MAC CE for separate TCI state, the maximum value of the number of TCI state ID fields N (F i,j Field and S i,j The number of fields may be 32 or more. i,j Field and S i,j In at least one of the fields, the maximum value of at least one of i and j may be increased. For example, the maximum value of j may be 4. i,j Field and S i,j The definition of at least one of the fields may be the same as the definition in at least one of the additional extended MAC CE for the joint TCI state and the additional extended MAC CE for the separate TCI state (in Rel. 18). This extension may be based on the following examples: Example 1: In the extension to the MAC CE for the joint TCI state, F for i=1,2,3,4,5,6,7,8 and j=1,2 as in the example of Figure 4.i,j After the octet containing the field, F for i=1,2,3,4,5,6,7,8 and j=3,4 i,j Octets containing fields may be added / inserted. i,j The order of the fields is not limited to the order in this example. Example 2: In an extension to a MAC CE for separate TCI state, as in the example of FIG. 5, F i,j Field and S i,j After the octet containing the field, F for i=1,2,3,4,5,6,7,8 and j=3,4 i,j Field and S i,j Octets containing fields may be added / inserted. i,j Field and S i,j The order of the fields is not limited to the order in this example. ---◆ Whether one code point is associated with up to two TCI states (Rel. 18 behavior) or more than two TCI states (new behavior) may be explicitly indicated / configured. ---◆ As in the example of Figure 6, the enhanced MAC CE may indicate mapping between code points in the TCI field and the first, second, third, and fourth joint TCI states. The value of the joint TCI state ID is not limited to the value in this example.

[0193] - Option 1-2: At least one MAC CE among the Enhanced Unified TCI States Activation / Deactivation MAC CE for Joint TCI States and the Enhanced Unified TCI States Activation / Deactivation MAC CE for Separate TCI States is not extended, and a mapping from the codepoint indicated by that MAC CE to more than two TCI states is defined. For example, TCI field codepoint k is associated with two TCI states (the first and second TCI states) corresponding to both the kth codepoint and the (k-1)th codepoint (or the (k+1)th codepoint). As shown in the example of Figure 7, when mapping A between TCI field code point k and the first and second joint TCI states is defined / configured / indicated / activated, code point k=001 of the TCI field in the DCI is associated with four TCI states: two TCI states #0 and #8 corresponding to code point k-1=000, and two TCI states #1 and #9 corresponding to code point k=001. Whether k is associated with up to two TCI states or more than two TCI states may be determined based on the "Notification of Information to UE" described below (e.g., may be configured by RRC). The value of the joint TCI state ID is not limited to the value in this example. ◆◆ The first and second TCI states may be associated with up to four TRPs, respectively, in ascending order of the two code points.When the above-mentioned mapping A is defined / configured / indicated / activated, for code points k=001, 011, 101, 111, as in the example of Figure 8, the first TCI state of code point k-1, the second TCI state of code point k-1, the first TCI state of code point k, and the second TCI state of code point k may actually be associated with the first TRP, the second TRP, the third TRP, and the fourth TRP, respectively. For example, for code point k, the first TCI state of code point k, the second TCI state of code point k, the first TCI state of code point k+1, and the second TCI state of code point k+1 may be associated with the first TRP, the second TRP, the third TRP, and the fourth TRP, respectively.

[0194] ◆ Option 2: If a list of TCI field code points and N>2 TCI states (i-th indicated TCI state for i=1, 2,...,N) is configured / activated and the TCI field code point is associated with fewer TCI states than N, the UE performs specific behavior assuming QCL. This option may be based on the following options:

[0195] - Option 2-1: The specific behavior may be at least one of the following options:

[0196] --◆Option 2-1-1: The UE updates the QCL assumptions for one or more indicated TCI states and maintains the indicated / not updated TCI states. For example, if the list includes a first codepoint associated with four TCI states and a second codepoint associated with three TCI states, and the TCI field indicates the first codepoint and then the second codepoint, the first, second, and third TCI states are updated according to the second codepoint, and the fourth TCI state is maintained according to the first codepoint.

[0197] Option 2-1-2: The UE updates the QCL assumptions for one or more indicated TCI states, and the QCL assumptions for the indicated / not updated TCI states may be defined in the specification or configured by RRC. For example, at least one of the following behaviors may be defined in the specification: When a UE configured with a DL or joint TCI state list (dl-OrJointTCI-StateList) attempts to transmit either a PUCCH with a positive HARQ-ACK or a PUSCH with a positive HARQ-ACK corresponding to a DCI carrying a TCI state indication and having no DL assignment, or corresponding to a PDSCH scheduled by a DCI carrying a TCI state indication, if the indicated TCI state is different from the previously indicated TCI state, the UE updates the indicated TCI-State(s) and If the UE receives more than one indicated TCI state for a CC / BWP that applies starting from the first slot at least beamAppTime symbols after the last symbol of the PUCCH or PUSCH, the indicated TCI state carried in the last DCI within the time corresponding to the positive HARQ-ACK value applies. Both the first slot and beamAppTime symbols are determined on the active BWP with the smallest SCS among the BWPs from the CC to which the indicated TCI-State(s) or indicated TCI-UL-State(s) apply, which is activated at the end of the PUCCH or PUSCH carrying the positive HARQ-ACK.---◆When a UE is configured with a DL or joint TCI state list (dl-OrJointTCI-StateList) and has two indicated TCI states, and the UE receives a TCI codepoint that is mapped to at least one of a subset of the first and second TCI states (TCI-State(s)) and a subset of the first and second UL-TCI states (UL-TCI-State(s)), the UE updates the available TCI state if at least one of the first and second TCI states and the first and second UL-TCI states mapped to that TCI codepoint is available, and maintains at least one of the previous first and second TCI states and the first and second UL-TCI states that is not indicated / updated by that TCI codepoint.

[0198] ◆ Option 3: The TCI selection field in the DCI is extended to allow for indication of more than two TCI states. The extension may be based on at least one of several options 3-x below.

[0199] -◆Option 3-1: The number of bits (bit width) of the TCI selection field is extended from 2 to X. For example, X bits may select one or more TCI states from up to four TCI states. X may be based on at least one of the following examples. -◆Example: X bits are Σ n=1 4 It is possible to indicate one of C(4,n). In this case, there are 4+6+4+1=15 code points, and X=4 is required. Example: X bits are a bitmap, where the i-th bit corresponds to the i-th indicated TCI state. In this case, assuming up to four TCI states, X=4 is required.

[0200] -◆Option 3-2: There is no expansion of the bit width of the TCI selection field, and a new mapping from the TCI selection field code points to one or more indicated TCI states is defined. For example, as shown in the example of Figure 9, the code points 00, 01, 10, and 11 of the TCI selection field indicate the first indicated TCI state, the first and second indicated TCI states, the first, second, and third indicated TCI states, and the first, second, third, and fourth indicated TCI states, respectively.

[0201] ◆Option 4: When more than two TCI states for CJT-PDSCH can be indicated, the TCI state for channels / RS other than CJT-PDSCH may be based on at least one of the following options 4-x.

[0202] - Option 4-1: As the TCI state for channels / RS other than CJT-PDSCH, up to one TCI state may be determined based on a rule defined in the specification, may be set by RRC, or may be indicated by DL MAC CE / DCI. The up to one TCI state may be applied to at least one of CSI-RS, PDCCH, and PDSCH scheduled by DCI format 1_0 / 1_2 / 1_3.

[0203] ◆ Option 4-2: As the TCI state for channels / RS other than CJT-PDSCH, up to two TCI states may be determined based on rules defined in the specifications, may be configured by RRC, or may be indicated by DL MAC CE / DCI. The up to two TCI states may apply to at least one of the following several examples. --◆ Example: (Rel. 19) CJT-PDSCH without the configuration of at least one of CJT calibration reporting and delay / frequency offset pre-compensation. --◆ Example: PDSCH scheduled by DCI format 1_0. For example, for a PDSCH scheduled by DCI format 1_0, up to two TCI states configured by RRC may apply, or only one TCI state based on the RRC configuration may apply.

[0204] ◆ Option 5: The "DCI" in embodiment 2 may be at least one of the following options. - ◆ Option 5-1: DCI that schedules a PDSCH. The DCI may be DCI format 1_x. - ◆ Option 5-2: DCI that schedules a PUSCH. The DCI may be DCI format 0_x. - ◆ Option 5-3: DCI other than option 5-1 and option 5-2. The DCI may include DCI format 2_x.

[0205] Supplementary Notes on First and Second Embodiments In the present disclosure, CJT-PDSCH, PDSCH, NZP CSI-RS for the CJT CSI codebook, CJT-based signal, and CJT-based channel / RS may be interchanged. In the present disclosure, settings related to the CJT, settings related to the CJT-based signal, settings for the CJT-PDSCH, settings for the PDSCH, and settings for the NZP CSI-RS for the CJT CSI codebook may be interchanged.

[0206] The UE may receive a configuration for the CJT and may determine whether to apply one TCI state to a signal based on the CJT.

[0207] <Supplementary Information> <<Notification of Information to UE>> In the above-described embodiments, any information may be notified to the UE [from a Network (NW) (e.g., a Base Station (BS))] (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC message, LTE positioning protocol (LPP) message), specific signals / channels (e.g., DCI, PDCCH, PDSCH, reference signal), or a combination thereof.

[0208] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an existing MAC CE with a new octet introduced.

[0209] When the notification is performed by a DCI, the notification may be performed by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0210] In addition, notification of any information to the UE in the above embodiments may be periodic, semi-persistent (triggered by the UE or the gNB), or aperiodic (triggered by the UE or the gNB).

[0211] In the above embodiment, the UE may receive information of at least one of the following QCL rules from the NW: QCL Type A QCL Type B QCL Type C QCL Type D

[0212] In the above embodiment, the QCL source RS for each QCL type may be at least one of the following several RSs: ◆ SSB ◆ CSI-RS with / without repetition ◆ TRS ◆ DMRS of PDCCH / PDSCH

[0213] In the above-described embodiment, the information from the NW may be set / instructed by the following methods: ◆ Common to multiple UEs or UE-specific ◆ Cell-specific or common to multiple cells ◆ Per UE / per CC / per BWP / per band / per cell / per cell group (CG)

[0214] <<Notification of Information from UE>> In the above-described embodiments, notification of any information from the UE [to the NW] (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC message, LPP message), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0215] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an extension of an existing MAC CE by introducing a new octet.

[0216] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0217] In addition, notification of any information from the UE in the above embodiments may be periodic, semi-persistent (triggered by the UE or the gNB), or aperiodic (triggered by the UE or the gNB).

[0218] <<Regarding application of each embodiment>> In a UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the above-mentioned embodiments may be applied (used) when one or more of the following conditions are met: ◆ Upper layer parameters indicating the specific processes / operations / controls / assumptions / information are set, ◆ The specific processes / operations / controls / assumptions / information are determined based on related upper layer parameters, ◆ The specific processes / operations / controls / assumptions / information are specified / activated / triggered by MAC CE / DCI / UCI / resources / channels / RS, ◆ A specific UE capability indicating (or related to) the specific processes / operations / controls / assumptions / information is reported or supported, ◆ The application of the specific processes / operations / controls / assumptions / information is determined based on specific conditions.

[0219] The specific UE capability may indicate at least one of the following: ◆ Supporting the specific process / operation / control / assumption / information ◆ Capability of each embodiment ◆ Capability of each option in each embodiment, or capability of a combination of multiple options in each embodiment ◆ Capability of each option in each embodiment, or capability of a combination of multiple options in each embodiment.

[0220] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0221] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0222] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0223] The information on whether one or more of the above embodiments / options / choices / examples apply / are used, or which of several of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆ The information is configured by one or more higher layer parameters / RRC IEs. ◆ The information is determined by one or more related higher layer parameters / RRC IEs. ◆ The information is indicated by a MAC CE / DCI. ◆ The information is based on one or more UE capabilities. ◆ The information is described / defined in a specification. ◆ The information is based on conditions described / defined in a specification. ◆ The information is determined by a combination of several of the above information. For example, the information is determined by the configuration / indication of higher layer parameters / MAC CE / DCI and reported by a UE capability.

[0224] The above embodiments / options / choices may be combined into one embodiment / option / choice.

[0225] In the above embodiments, the RS to be measured may be a QCL source RS in an active / indicated / unified TCI state.

[0226] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a receiving unit that receives settings related to coherent joint transmission (CJT); and a control unit that determines whether to apply one transmission configuration indication (TCI) state to the CJT-based signal. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein, if pre-compensation is applied to the CJT-based signal, the control unit determines to apply the one TCI state to the CJT-based signal. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein, based on an indication of more than two TCI states, the control unit determines to apply the more than two TCI states to the CJT-based signal. [Supplementary Note 4] The terminal according to any one of Supplementary Notes 1 to 3, wherein, when a first number of TCI states greater than two is indicated and then a second number of TCI states smaller than the first number is indicated, the control unit updates only the second number of TCI states and maintains the remaining TCI states.

[0227] (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.

[0228] 10 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as 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).

[0229] 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.

[0230] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0231] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0232] 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.

[0233] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0234] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0235] 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.

[0236] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0237] 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.

[0238] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0239] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0240] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0241] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0242] 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.

[0243] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0244] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0245] 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.

[0246] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0247] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0248] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0249] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0250] 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.

[0251] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0252] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0253] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0254] 11 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.

[0255] 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.

[0256] 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.

[0257] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0258] 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.

[0259] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0260] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0261] 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.

[0262] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0263] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0264] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0265] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0266] 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 130.

[0267] 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.

[0268] 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.

[0269] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0270] 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.

[0271] The transceiver unit 120 may transmit a configuration related to coherent joint transmission (CJT), and the control unit 110 may determine whether a transmission configuration indication (TCI) state applies to the CJT-based signal.

[0272] (User Terminal) Fig. 12 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0273] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0274] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0275] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0276] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0277] 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.

[0278] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0279] 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.

[0280] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0281] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0282] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0283] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0284] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0285] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0286] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0287] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0288] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0289] Note that the transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0290] The transceiver unit 220 may receive a configuration related to coherent joint transmission (CJT), and the control unit 210 may determine whether to apply a transmission configuration indication (TCI) state to the CJT-based signal.

[0291] If pre-compensation is applied to the CJT-based signal, the controller 210 may determine to apply the one TCI state to the CJT-based signal.

[0292] The controller 210 may determine to apply more than two TCI states to the CJT-based signal based on an indication of more than two TCI states.

[0293] If a first number of TCI states greater than two is indicated and then a second number of TCI states less than the first number is indicated, the control unit 210 may update only the second number of TCI states and maintain the remaining TCI states.

[0294] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0295] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0296] For example, a base station, a user terminal, or the like 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. 13 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, and the like.

[0297] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0298] 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.

[0299] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0300] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0301] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0302] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0303] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0304] 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.

[0305] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0306] 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.

[0307] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0308] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0309] 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.

[0310] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0311] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0312] 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.

[0313] 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.

[0314] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0315] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0316] 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.

[0317] 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.

[0318] 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.

[0319] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0320] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0321] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0322] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0323] 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.

[0324] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0325] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0326] 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."

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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.

[0332] 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.

[0333] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0334] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0335] 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).

[0336] 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).

[0337] 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.

[0338] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0339] 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).

[0340] In this 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," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0341] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0342] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0343] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0344] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0345] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0346] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0347] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0348] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0349] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0350] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0351] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0352] 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.

[0353] 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.

[0354] 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.

[0355] 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.

[0356] 14 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0357] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0358] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0359] 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.

[0360] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0361] 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.

[0362] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0363] 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.

[0364] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0365] 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.

[0366] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0367] 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.

[0368] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0369] 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.

[0370] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0371] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0372] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0373] 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."

[0374] 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.

[0375] 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.

[0376] 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.

[0377] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0378] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0379] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...." "does not expect ..." may be interchangeably read as "be not expected ...." Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (e.g., if apparatus A is a UE, apparatus B may be a base station).

[0380] 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.

[0381] 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."

[0382] 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.

[0383] 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."

[0384] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0385] 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.

[0386] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0387] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0388] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0389] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0390] 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 description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A terminal having a receiver that receives a configuration related to coherent joint transmission (CJT); and a controller that determines whether to apply one transmission configuration indication (TCI) state to a signal based on the CJT.

2. The terminal according to claim 1, wherein the control unit determines to apply the one TCI state to the CJT-based signal if pre-compensation is applied to the CJT-based signal.

3. The terminal of claim 1, wherein the control unit determines to apply more than two TCI states to the CJT-based signal based on an indication of more than two TCI states.

4. The terminal of claim 1, wherein when a first number of TCI states greater than two is indicated and then a second number of TCI states less than the first number is indicated, the control unit updates only the second number of TCI states and maintains the remaining TCI states.

5. A wireless communication method for a terminal, comprising: receiving a configuration related to coherent joint transmission (CJT); and determining whether to apply one transmission configuration indication (TCI) state to a signal based on the CJT.

6. A base station having a transmitter that transmits settings related to coherent joint transmission (CJT); and a controller that determines whether one transmission configuration indication (TCI) state is applied to a signal based on the CJT.

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