Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a receiving unit for receiving information relating to the setting of at least one channel state information reference signal (CSI-RS) resource for channel measurement for coherent joint transmission (CJT); and a control unit that, in the reception of a downlink shared channel (PDSCH) corresponding to the CJT, determines the quasi co-location of the PDSCH and the CSI-RS resource on the basis of at least one of the number of transmission configuration indicators (TCI) for the PDSCH, the number of the CSI-RS resource, and the number of TCI states corresponding to the CSI-RS.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+ (plus), the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] In future wireless communication systems (e.g., NR), the reporting of received Channel State Information (CSI) based on reference signals is under investigation. Furthermore, research is being conducted on deep transmission (DL) to terminals (user terminals, user equipment) using multiple transmission / reception points (TRPs), multiple TRPs (MTRPs), or multiple panels (multi-panels). Additionally, coherent joint transmission (CJT) using multiple TRPs / multi-panels is being investigated.

[0009] However, even with the support of DL channels / signals for CJT applications (e.g., PDSCH / CSI measurement resources), the methods for setting up these channels / signals have not been adequately studied.

[0010] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station that can properly communicate even when CJT is applied / supported in a DL channel / signal.

[0011] Methods for solving problems

[0012] One aspect of the present disclosure relates to a terminal comprising: a receiving unit that receives information relating to the setting of at least one channel state information reference signal (CSI-RS) resource for channel measurement for coherent joint transmission (CJT); and a control unit that, in receiving a downlink shared channel (PDSCH) corresponding to a CJT, determines, based on at least one of the number of transmission configuration indicator (TCI) for the PDSCH, the number of the CSI-RS resources, and the number of TCI states corresponding to the CSI-RS, whether the PDSCH and the CSI-RS resources are quasi-co-located.

[0013] Invention Effects

[0014] According to one aspect of this disclosure, communication can be performed appropriately even when CJT is applied / supported in the DL channel / signal. Attached Figure Description

[0015] Figures 1A to 1D This is a diagram illustrating an example of the relationship between CMR and TCI states.

[0016] Figures 2A to 2CThis is another example of the association between CMR and TCI states.

[0017] Figure 3 This is a diagram illustrating an example of the PDSCH used in CJT and the QCL used in CMR.

[0018] Figure 4 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0019] Figure 5 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0020] Figure 6 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0021] Figure 7 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment.

[0022] Figure 8 This is a diagram illustrating an example of a vehicle according to one embodiment. Detailed Implementation

[0023] (TCI, Spatial Relations, QCL)

[0024] The following is being studied in NR: Based on the Transmission Configuration Indication state (TCI state), control is being exercised over the reception processing (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) of at least one of the signals and channels (referred to as signal / channel) in the UE.

[0025] TCI states can also represent elements of signals / channels applied to the downlink. The equivalent of TCI states applied to signals / channels in the uplink can also be described as spatial relations.

[0026] TCI status refers to information related to the quasi-co-location (QCL) of a signal / channel, and can also be referred to as spatial reception parameters, spatial relation information, etc. TCI status can also be set for the UE on a per-channel or per-signal basis.

[0027] QCL is an indicator that represents the statistical properties of a signal / channel. For example, if a signal / channel has a QCL relationship with other signals / channels, it can also mean that it can be assumed that at least one parameter of Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same among these different signals / channels (at least one of them is a QCL).

[0028] Additionally, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in this disclosure may also be rewritten as sQCL (spatial QCL).

[0029] QCLs can also specify multiple types (QCL types). For example, four different QCL types (AD) can be set that can assume the same parameters (or parameter sets).

[0030] The UE envisions a relationship between a certain Control Resource Set (CORESET), channel, or reference signal and other CORESETs, channels, or reference signals in a specific QCL (e.g., QCL type D). This situation can also be referred to as QCL assumption.

[0031] The UE can also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0032] TCI status can also be, for example, information related to the QCL between the target channel (in other words, the reference signal (RS) used by the channel) and other signals (e.g., other RS). TCI status can also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0033] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0034] The channel that is set (specified) to TCI state or spatial relationship can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0035] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also known as a Tracking Reference Signal (TRS)), or a QCL Detection Reference Signal (also known as a QRS).

[0036] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0037] The RS of QCL type X in TCI state can also refer to the RS that is in a relationship of QCL type X with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0038] In this disclosure, the port (antenna port) of a signal (resource, channel) and RS (DL RS, QCL source RS) are set to QCL; there is a QCL relationship between the port of a signal and RS; the signal and RS are set to QCL; the signal and RS in a TCI state are set to QCL; the signal and RS in a TCI state with respect to a specific QCL type are set to QCL; the signal and TCI state are associated; the TCI state is set / indicated for the signal; the UE assumes that the port of the signal and RS in the TCI state are set to QCL, which can also be mutually modified.

[0039] In this disclosure, beam, SD beam, spatial domain index, precoding, precoder, quasi co-location (QCL) concept, QCL relationship, transmission configuration indicator (TCI) status, spatial domain filter, spatial domain receive filter, spatial domain transmit filter, reference signal (RS) and spatial receive parameters can also be rewritten to each other.

[0040] (Unified / Common TCI Framework)

[0041] According to the unified TCI framework, multiple (UL / DL) channels / RS can be controlled through a common framework. Regarding the unified TCI framework, instead of specifying TCI states or spatial relationships for each channel as in Rel. 15, it can both indicate a common beam (common TCI state) and apply it to all channels of UL and DL, and also apply the common beam used by UL to all channels of UL and the common beam used by DL to all channels of DL.

[0042] We are researching a common beam for both DL and UL, or a common beam for DL ​​and a common beam for UL (integrated as two common beams).

[0043] The UE can also envision the same TCI state for both UL and DL (joint TCI state, joint TCI pool, joint common TCI pool, joint TCI state set). The UE can also envision different TCI states for each of 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).

[0044] UL and DL default beam alignment can also be achieved through MAC CE-based beam management (MAC CE-level beam indication). The default TCI state of the PDSCH can also be updated and matched with the default UL beam (spatial relationship).

[0045] Alternatively, a common beam / unified TCI state can be indicated from the same TCI pool (joint common TCI pool, joint TCI pool, set) used by both UL and DL through DCI-based beam management (DCI-level beam indication). X (>1) TCI states can also be activated via MAC CE. UL / DL DCI can also select one from X active TCI states. The selected TCI state can also be applied to the channels / RS of both UL and DL.

[0046] A TCI pool (set) can be either multiple TCI states set via RRC parameters, or multiple TCI states activated via MAC CE (activating a TCI state, activating a TCI pool, or a set) among multiple TCI states set via RRC parameters. Each TCI state can also be a QCL type A / D RS. As a QCL type A / D RS, it can also be set as SSB, CSI-RS, or SRS.

[0047] The number of TCI states corresponding to each of more than one TRP can also be specified. For example, the number of TCI states (UL TCI states) applied in the UL channel / RS (≥1) and the number of TCI states (DL TCI states) applied in the DL channel / RS (≥1) can also be specified. At least one of N and M can also be notified / set / indicated to the UE via higher-layer signaling / physical layer signaling.

[0048] In this disclosure, when N=M=X (X is any integer), it may also mean notifying / setting / indicating X TCI states (corresponding to X TRPs) common to UL and DL (joint TCI states) to the UE. Furthermore, when N=X (X is any integer) and M=Y (Y is any integer, or Y=X), it may also mean notifying / setting / indicating X UL TCI states (corresponding to X TRPs) and Y DL TCI states (corresponding to Y TRPs) (i.e., independent TCI states) to the UE separately.

[0049] For example, when N=M=1 is recorded, it can also mean to notify / set / indicate to the UE a TCI state common to a UL and DL for a single TRP (the joint TCI state for a single TRP).

[0050] In addition, for example, when N=1 and M=1 are recorded, it can also mean: separately notifying / setting / indicating a UL TCI state and a DL TCI state (an independent TCI state for a single TRP) for the UE.

[0051] In addition, for example, when N=M=2 is recorded, it can also mean: the TCI state (for the joint TCI state of multiple TRPs) that is common to multiple (two) ULs and DLs for multiple (two) TRPs, notifying / setting / indicating to the UE.

[0052] In addition, for example, when N=2 and M=2 are recorded, it can also mean: notifying / setting / instructing the UE of multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs (independent TCI states for multiple TRPs).

[0053] Furthermore, the above example illustrates the case where N and M have values ​​of 1 or 2, but the values ​​of N and M can also be 3 or higher, and N and M can also be different.

[0054] Support for N=M=1 in Rel.17 is under investigation. For example, it would also be possible to support indicating a common beam (e.g., common beam) via RRC / MAC CE / DCI, and having this common beam applied to multiple DL / UL channels / reference signals. Furthermore, other scenarios could be supported in Rel.18 and later.

[0055] In a joint DL / UL TCI state (e.g., a joint DL / UL TCI state), the RRC parameter (information element) sets multiple TCI states for both DL and UL. The MAC CE can also activate multiple TCI states among the set TCI states. The DCI can also indicate one of the activated TCI states.

[0056] A DCI can be a UL DCI (e.g., a DCI used for PUSCH scheduling) or a DL DCI (e.g., a DCI used for PDSCH scheduling). The indicated TCI state can also be applied to at least one (or all) of the UL / DL channels / RS. A DCI can also indicate both the UL TCI and the DL TCI.

[0057] A TCI status ID that is indicated can be either a TCI status applied to both UL and DL, or two TCI statuses applied to UL and DL respectively.

[0058] At least one of the multiple TCI states set by RRC parameters and the multiple TCI states activated by MAC CE can also be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). Multiple TCI states activated by MAC CE can also be referred to as an activated TCI pool (activated common TCI pool).

[0059] Furthermore, in this disclosure, the high-level parameters (RRC parameters) for setting multiple TCI states can also be referred to as setting information for setting multiple TCI states, or simply as "setting information". Additionally, in this disclosure, the use of a DCI to indicate one of the multiple TCI states can be either receiving indication information contained in the DCI indicating one of the multiple TCI states, or simply receiving the "indication information".

[0060] In a separate TCI state (e.g., a separate TCI (DL TCI state and UL TCI state)), the RRC parameter sets multiple TCI states (joint common TCI pools) for both DL and UL. The MAC CE can also activate multiple TCI states (activate TCI pools) among the set multiple TCI states. It can also set / activate separate, independent TCI pools for each of UL and DL.

[0061] The DL DCI or new DCI format can also select (indicate) more than one (e.g., one) TCI state. The selected TCI state can also be applied to more than one (or all) DL channels / RS. The DL channel can also be PDCCH / PDSCH / CSI-RS. The UE can also use the Rel.16 TCI state operation (TCI framework) to determine the TCI state of each DL channel / RS. The UL DCI or new DCI format can also select (indicate) more than one (e.g., one) TCI state. The selected TCI state can also be applied to more than one (or all) UL channels / RS. The UL channel can also be PUSCH / SRS / PUCCH. Thus, different DCIs can separately indicate the UL TCI and the DL DCI.

[0062] From Rel.17 NR onwards, it is envisioned that support will be provided via MAC CE / DCI for beam activation / indication to TCI states associated with different physical cell identifiers (PCIs). Furthermore, from Rel.18 NR onwards, it is envisioned that support will be provided via MAC CE / DCI for indicating changes to serving cells with different PCIs.

[0063] The application can also be switched between the joint TCI state and the standalone (DL / UL) TCI state. Which TCI state to use (joint TCI state or standalone TCI state) can be set by the base station to the UE via higher-layer parameters, or it can be switched via the TCI field (TCI state ID) within the DCI.

[0064] The unified TCI framework supports the following modes 1 to 3.

[0065] [Mode 1] TCI state indication based on MAC CE

[0066] [Mode 2] DCI-based TCI state indication with DL assignment (DCI based TCI state indication by DCI format 1_1 / 1_2 with DL assignment)

[0067] [Mode 3] DCI-based TCI state indication without DL assignment (DCI based TCI state indication by DCI format 1_1 / 1_2 without DL assignment)

[0068] In addition, the DCI in Mode 2 / Mode 3 mentioned above can also be called beam indication DCI.

[0069] In this disclosure, the TCI state indicated by DCI, the indicated TCI state, the unified TCI state, the TCI state applied to multiple types of channels / signals, the joint TCI state (for DL ​​and UL), the DL TCI state, the UL TCI state, the Rel.17 TCI state, the common TCI state, the single unified TCI state set, and the single unified TCI state activated can also be overwritten with each other.

[0070] In this disclosure, the TCI state set by RRC parameters, the configured TCI state, the set TCI state, the TCI state that does not follow the unified TCI state, the TCI state other than the unified TCI state, the TCI state / spatial relationship set for a specific channel / signal, and the dedicated TCI state can also be rewritten to each other.

[0071] The unified / public TCI status can also refer to the TCI status indicated by the (Rel.17) DCI / MAC CE / RRC.

[0072] The indicated TCI state can also be shared with at least one of the UE-specific receive, dynamic licensing (DCI) / configured licensing PUSCH in the PDSCH / PDCCH (updated using Rel.17 DCI / MAC CE / RRC) and multiple (e.g., all) dedicated PUCCH resources. The TCI state indicated via DCI / MAC CE / RRC can also be referred to as the indicated TCI state or the unified TCI state.

[0073] In cases where indicating the TCI state is not supported (in Rel.17), a TCI state other than the unified TCI state can also refer to the TCI state set using (Rel.17) MAC CE / RRC (setting the TCI state).

[0074] The TCI state setting may not be shared with at least one of the UE-specific receive, dynamically authorized (DCI) / configured authorized PUSCH, and multiple (e.g., all) dedicated PUCCH resources in the PDSCH / PDCCH (updated using DCI / MAC CE / RRC in Rel.17). The TCI state setting may also be structured such that it is set per CORESET / per resource / per resource set via RRC / MAC CE, and the TCI state setting is not updated even if the aforementioned indicated TCI state is updated.

[0075] Investigating: Applying TCI status indication to UE-specific channels / signals (RS). Additionally, investigating the use of higher-layer signaling (RRC signaling) to notify the UE of applying TCI status indication to non-UE-specific channels / signals, and which TCI status is being set.

[0076] An investigation is underway to set the RRC parameters associated with setting the TCI state (TCI state ID) to the same structure as the RRC parameters for the TCI state in Rel. 15 / 16. An investigation is also underway to use RRC / MAC CE to set / indicate the TCI state per CORESET / per resource / per resource set. Furthermore, an investigation is underway to investigate how the UE can make decisions based on specific parameters regarding this setting / indication.

[0077] Research is underway to separately update the indicator TCI state and the setting TCI state for the UE. For example, for the UE, if the unified TCI state indicating the TCI state is updated, the update of the setting TCI state may not be performed. Furthermore, research is underway to allow the UE to make a decision based on specific parameters for this update.

[0078] In addition, research is underway on using higher-level signaling (RRC / MAC CE) to switch whether to apply the indicator TCI state or not for PDCCH / PDSCH (apply setting TCI state, apply TCI state with indicator TCI state set separately).

[0079] In addition, for intra-cell beam indication (TCI status indication), research is underway to support TCI status indication for UE-specific CORESET and PDSCH associated with that CORESET, as well as for non-UE-specific CORESET and PDSCH associated with that CORESET.

[0080] In addition, for inter-cell beam indication (e.g., L1 / L2 inter-cell mobility), research is underway to support indication of TCI status for UE-specific CORESET and PDSCH associated with that CORESET.

[0081] In Rel.15, whether a TCI state is indicated for CORESET#0 depends on the base station implementation. In Rel.15, for CORESET#0 that is indicated with a TCI state, that indicated TCI state is applied. For CORESET#0 that is not indicated with a TCI state, the SSB and QCL selected in the most recent (most recent) PRACH transmission are applied.

[0082] In the unified TCI state framework after Rel.17, the TCI state related to CORESET#0 is being studied.

[0083] For example, within the framework of the unified TCI state after Rel.17, the TCI state indication for CORESET#0 (Rel.17) can be configured by RRC for each CORESET to determine whether to apply the indicated Rel-17 TCI state associated with the serving cell. If not applied, the existing MAC CE / RACH signaling mechanism can be utilized.

[0084] Additionally, in Rel.17, the CSI-RS associated with the TCI state applied to CORESET#0 can also be in QCL with the SSB associated with the serving cell PCI (physical cell ID) (same as Rel.15).

[0085] Alternatively, for CORESET#0, CORESETs with a common search space (CSS), and CORESETs with both CSS and a UE-specific search space (USS), the RRC parameter can be used to set whether to follow the indicated TCI state for each CORESET. If the indicated TCI state is not set for a particular CORESET, the TCI state setting can also be applied to that CORESET.

[0086] You can also set whether to follow the indicated TCI state for each non-UE-dedicated channel / RS (other than CORESET) via RRC parameters. If the indicated TCI state is not set for a channel / resource / resource set, you can also apply the set TCI state to that channel / resource / resource set.

[0087] [Antenna Port QCL... Data uses physical layer procedures]

[0088] For a UE, in order to decode the PDSCH according to the detected PDCCH accompanied by the DCI used by the UE with the given serving cell, a list of up to M TCI-States can be configured in the higher-layer parameter PDSCH-Config. Here, M depends on the UE capability maxNumberConfiguredTCIstatesPerCC. Each TCI-State contains parameters for setting 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 set by the higher-layer parameter qcl-Type1 for the first DL RS and (if set) the higher-layer parameter qcl-Type2 for the second DL RS. In the case of two DL RSs, the QCL type is different regardless of whether the reference is the same DL RS or different DL RSs. The QCL type corresponding to each DL RS can also be provided by the higher-layer parameter qcl-Type in QCL-Info, and can take one of the following values:

[0089] - 'Type A': {Doppler offset, Doppler spread, average delay, delay spread}

[0090] - 'Type B': {Doppler offset, Doppler extension}

[0091] - 'Type C': {Doppler offset, average delay}

[0092] - 'Type D': {space Rx parameter}

[0093] In order to provide reference signals for DMRS and DMRS of PDSCH and PDCCH and CSI-RS within a certain CC, and further, if the UL TX (transmit) spatial filter can be used and the UL TX (transmit) spatial filter is used for PUSCH and PUCCH resources and SRS based on dynamic permission and setting permission within a certain CC, in order to provide a reference for determining the UL TCI filter, the UE can be configured with a list of up to 128 DLorJointTCIState (DL or joint TCI state) settings in PDSCH-Config.

[0094] If no TCI state (DL or joint TCI state (TCI-State), or ULTCI state (TCI-UL-State)) is set in the BWP within the reference CC, the UE can apply the TCI-State or TCI-UL-State setting from the reference BWP of the reference CC. If the UE is set with dl-OrJointTCI-StateList or TCI-UL-State in any CC within the same band, it is not expected that any of the following will be set except for SpatialRelationInfoPos (location spatial relation information), tci-StatesToAddModList (addition change TCI state list), SpatialRelationInfo (spatial relation information), and PUCCH-SpatialRelationInfo (PUCCH spatial relation information) within that band. For this UE, if the UE is configured with a TCI-State in any CC within the CC list via 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 can assume that it is not configured with a dl-OrJointTCI-StateList or TCI-UL-State in any CC within the same band field of the CC list.

[0095] The UE receives an activation command that maps up to eight TCI states and / or up to eight TCI state pairs (accompanying one TCI state for the DL channel / signal and / or one TCI state for the UL channel / signal) to the 'Transmission Configuration Indication' field of the DCI field for one or more CCs / DL BWPs, and, if applicable, to the 'Transmission Configuration Indication' field of the DCI field for one or more CCs / UL BWPs. These up to eight TCI states and / or up to eight TCI state pairs are as described in the MAC protocol specification's UE-specific PDSCH TCI State Activation / Deactivation MAC CE or Unified TCI State Activation / Deactivation MAC CE.

[0096] For a set of CCs / DL BWPs, and if applicable, for a set of CCs / UL BWPs, when the set of TCI status IDs is activated and the list of applicable CCs is determined by the CCs indicated in the activation command, the same set of TCI status IDs is applied to all DLs and / or UL BWPs within the indicated CC.

[0097] If the activation command maps a TCI state (at least one of TCI-State and TCI-UL-State) to only one code point, when the mapping indicated for that single TCI code point is applied as described in the requirements for support of Radio Resource Management (RRM) (MAC CE-based DL TCI state handover delay / MAC CE-based UL TCI state handover delay), the UE applies the indicated TCI state (at least one of TCI-State and TCI-UL-State) to one or more CCs / DL BWPs, and, if applicable, to one or more CCs / UL BWPs.

[0098] If the bwp-id or cell corresponding to the QCL type A / D source RS in the QCL-Info of the TCI state is not set, the UE is assumed to have the QCL type A / D source RS set in the CC / DL BWP of the applied TCI state.

[0099] For CORESET, when a UE is configured to receive DCI format 1_1 / 1_2 with an active TCI state (TCI-State or TCI-UL-State), or a list of DL or JointTCI-States (dl-OrJointTCI-StateList) that is configured with a TCI field in the DCI (set to 'enabled' in tci-PresentInDCI or tci-PresentDCI-1-2), the UE receives DCI format 1_1 / 1_2. This DCI format 1_1 / 1_2 provides an indication of the TCI state (at least one of TCI-State and TCI-UL-State) for a CC, or for all CCs in the same CC list set by the simultaneous unified TCI update lists (simultaneousU-TCI-UpdateList1-r17, simultaneousU-TCI-UpdateList2-r17, simultaneousU-TCI-UpdateList3-r17, simultaneousU-TCI-UpdateList4-r17). For the DCI format 1_1 / 1_2, DL allocation can be used if it is possible, or it can be used without DL allocation.

[0100] If DCI format 1_1 / 1_2 does not have DL allocation, the UE can envision (verify) the following.

[0101] - CS-RNTI is used for scrambling the CRC for this DCI.

[0102] - The following DCI field (special field) values ​​are set as follows:

[0103] - The redundant version (RV) field is all '1's.

[0104] - The modulation and coding scheme (MCS) field is all '1's.

[0105] - The new data indicator (NDI) field is 0.

[0106] - 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 DynamicSwitch (same as the validation of the released PDCCH for DL ​​semi-persistent scheduling (SPS) or UL licensed type 2 scheduling).

[0107] If the UE receives a higher-level setting of dl-OrJointTCI-StateList with a single TCI-State that can be used as an indication of TCI state, the UE obtains the QCL assumption from the set TCI state for the DM-RS of PDSCH, DM-RS of PDCCH, and CSI-RS that apply the indication of TCI state.

[0108] If the UE receives a higher-level setting of a dl-OrJointTCI-StateList that can be used as an indication of TCI state, the UE determines the UL TX spatial filter from the set TCI state, if applicable, for PUSCH, PUCCH, and SRS that indicate the TCI state based on dynamic permission and setting permission.

[0109] If a UE in the list of DL-OrJointTCI-States is to transmit a PUCCH with a positive HARQ-ACK corresponding to a DCI that transmits a TCI state indication but is not accompanied by a DL-assigned DCI, or a PUSCH that is scheduled by transmitting a DCI that transmits a TCI state indication, and the indicated TCI state is different from a previously indicated TCI state, the indicated TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State) shall be applied from the first time slot (beam application timing 1) after the last symbol of the PUCCH or the PUSCH for at least beamAppTime symbols (beam application time (BAT)). The initial time slot and beamAppTime symbols are both determined on the active BWP within the BWP, which is accompanied by the minimum SCS. This BWP comes from a CC applied at the end of the transmission of the affirmative HARQ-ACK, the PUCCH, or the PUSCH to indicate the TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State).

[0110] [DCI format 1_1... multiplexing and channel coding]

[0111] In Rel.15 / 16, if the UE does not support activation of BWP changes via DCI, the UE ignores the BWP indicator field. The same action is also being investigated regarding the relationship between Rel.17 TCI state support and the interpretation of the TCI field. The investigation is underway to determine whether the TCI field is always present in DCI format 1_1 / 1_2 when the UE is configured with the Rel.17 TCI state, and whether the UE ignores the TCI field when it does not support TCI updates via DCI.

[0112] In Rel.15 / 16, the presence of the TCI field (TCI presence information within DCI, tci-PresentInDCI) is set for each CORESET.

[0113] In DCI format 1_1, the TCI field is 0 bits if the higher-layer parameter tci-PresentInDCI is not valid, otherwise it is 3 bits. When the BWP indicator field indicates that a BWP other than the active BWP is activated, the UE follows these actions.

[0114] [Action] If the higher-layer parameter tci-PresentInDCI is not valid for the CORESET used to transmit the DCI format 1_1 PDCCH, the UE assumes that tci-PresentInDCI is not valid for all CORESETs within the indicated BWP; otherwise, the UE assumes that tci-PresentInDCI is valid for all CORESETs within the indicated BWP.

[0115] In DCI format 1_2, the TCI field is 0 bits if the higher-layer parameter tci-PresentInDCI-1-2 is not set; otherwise, it is 1, 2, or 3 bits, determined by the higher-layer parameter tci-PresentInDCI-1-2. When the BWP indicator field indicates that a BWP other than BWP is activated, the UE follows the actions described below.

[0116] [Action] If the higher-layer parameter tci-PresentInDCI-1-2 is not set for the CORESET used to transmit the PDCCH of DCI format 1_2, the UE assumes that tci-PresentInDCI is not valid for all CORESETs within the indicated BWP. Otherwise, the UE assumes that tci-PresentInDCI-1-2 is set with the same value as tci-PresentInDCI-1-2 set for the CORESET used to transmit the PDCCH of DCI format 1_2 for all CORESETs within the indicated BWP.

[0117] The value of the TCI field used for the joint DL / UL TCI status indication is associated with the TCI status ID representing the joint DL / UL TCI status.

[0118] For the TCI field used to indicate the independent DL / UL TCI status, the value is associated with at least one of the TCI status IDs representing the TCI status only for DL ​​and the TCI status ID representing the TCI status only for UL. For example, TCI field values ​​000 to 001 are associated with only one TCI status ID for DL, TCI field values ​​010 to 011 are associated with only one TCI status ID for UL, and TCI field values ​​100 to 111 are associated with both one TCI status ID for DL ​​and one TCI status ID for UL.

[0119] [Channel / RS with TCI status indicated by the application]

[0120] The "indicated TCI state" based on MAC CE / DCI can also be applied to the following channels / RS.

[0121] [PDCCH]

[0122] • If `followUnifiedTCIState` is set for CORESET0, the TCI state is indicated to be applied. Otherwise, for this CORESET, the Rel.15 specification is applied. That is, CORESET0 follows the TCI state activated via MACCE, or is QCL-enabled with SSB.

[0123] • For CORESETs with USS / CSS type 3 and index 0 or above, the TCI status is always applied.

[0124] • If a CORESET other than index 0 is set to conform to the uniform TCI state for at least CSS type 3, the indicator TCI state is applied. Otherwise, the configured TCI state is applied to that CORESET.

[0125] [PDSCH]

[0126] • Always apply the indicator TCI status to the UE-dedicated PDSCH.

[0127] • When a non-UE-dedicated PDSCH (a PDSCH scheduled via DCI within the CSS) has its followUnifiedTCIState set (for the CORESET of the PDCCH that schedules the PDSCH), the indicator TCI state can also be applied. Otherwise, the set TCI state for that PDSCH is applied to that PDSCH. Whether a non-UE-dedicated PDSCH follows the indicator TCI state when followUnifiedTCIState is not set for the PDSCH depends on whether followUnifiedTCIState is set for the CORESET used in scheduling that PDSCH.

[0128] [CSI-RS]

[0129] • When the CORESET of the PDCCH that triggers the A-CSI-RS for CSI acquisition or beam management is set to followUnifiedTCIState, the TCI state is indicated. For other CSI-RS, the configured TCI state for that CSI-RS is applied.

[0130] [PUCCH]

[0131] • Always apply the indicator TCI status for all dedicated PUCCH resources.

[0132] [PUSCH]

[0133] • For dynamic / configured license PUSCH, always apply an indication of TCI status.

[0134] [SRS]

[0135] • When the SRS resource sets for A-SRS used for beam management and A / SP / P-SRS used for codebook (CB) / non-codebook (NCB) / antenna switching are set to follow a unified TCI state, the indicated TCI state is applied. For other SRS, the TCI state set within this SRS resource set is applied.

[0136] In this disclosure, the TCI state indicating the unified TCI state, the TCI state applied to a channel / signal set to conform to the unified TCI state, the TCI state applied to the UE-specific PDSCH and the CORESET / PDCCH associated with the USS, and the TCI state applied to the PUCCH and PUSCH can also be overridden with each other.

[0137] (CSI report (or reporting))

[0138] In Rel.15 NR, a terminal (also known as a user terminal, user equipment (UE), etc.) generates (also known as deciding, calculating, estimating, measuring, etc.) Channel State Information (CSI) based on a Reference Signal (RS) (or the resources used by that RS), and sends (also known as reporting, feedback, etc.) the generated CSI to the network (e.g., a base station). This CSI may also be sent to the base station using, for example, an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0139] The RS used for generating CSI can be, for example, at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), DeModulation Reference Signal (DMRS), etc.

[0140] CSI-RS may also include at least one of Non-Zero Power (NZP) CSI-RS and CSI Interference Management (CSI Interference Measurement, CSI-IM). An SS / PBCH block is a block containing SS and PBCH (and their corresponding DMRS), and may also be referred to as an SS block (SSB), etc. Furthermore, SS may also include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0141] Additionally, CSI may include at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0142] The UE can also receive information related to CSI reports (report configuration information) and control CSI reporting based on this information. This report configuration information can be, for example, the "CSI-ReportConfig" of the Radio Resource Control (RRC) Information Element (IE). Furthermore, in this disclosure, the RRC IE can be inter-modified with RRC parameters, higher-layer parameters, etc.

[0143] The report configuration information (e.g., “CSI-ReportConfig” in RRC IE) may also include at least one of the following.

[0144] • Information related to the type of CSI report (report type information, such as "reportConfigType" in RRC IE)

[0145] • Information related to more than one quantity of CSI that should be reported (more than one CSI parameter) (report quantity information, e.g., "reportQuantity" in RRC IE)

[0146] • Information related to the resources used to generate the RS (the CSI parameter) (resource information, such as "CSI-ResourceConfigId" in RRCIE).

[0147] • Information related to the frequency domain of the object being reported by CSI (frequency domain information, such as RRC IE's "reportFreqConfiguration")

[0148] For example, report type information can also indicate periodic CSI (P-CSI) reports, aperiodic CSI (A / AP-CSI) reports, or semi-permanent CSI (SP-CSI) reports.

[0149] In addition, the reporting volume information can also specify a combination of at least one of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0150] In addition, resource information can also be the ID of an RS resource. This RS resource may, for example, include a non-zero power CSI-RS resource or SSB, as well as a CSI-IM resource (e.g., a zero power CSI-RS resource).

[0151] Furthermore, frequency domain information can also represent the frequency granularity of CSI reports. This frequency granularity can include, for example, bandwidth and subband. Bandwidth is the entire CSI reporting band. Bandwidth can be either the entirety of a certain carrier (component carrier (CC)), cell, serving cell) or the entirety of the bandwidth part (BWP) within a carrier. Bandwidth can also be rewritten as CSI reporting band, entire CSI reporting band, etc.

[0152] Furthermore, a subband is a part of the bandwidth and can consist of more than one resource block (RB) or physical resource block (PRB). The size of a subband can also be determined based on the size of the bandwidth plan (number of PRBs).

[0153] Frequency domain information can also indicate which PMI is being reported, wideband or subband (frequency domain information may also include, for example, an RRC IE "pmi-FormatIndicator" for determining either wideband or subband PMI reporting). The UE can also determine the frequency granularity of the CSI report (i.e., either wideband or subband PMI reporting) based on at least one of the above reporting quantity information and frequency domain information.

[0154] When a wideband PMI report is set (determined), a single wideband PMI can be reported and used for the entire CSI report band. On the other hand, when a subband PMI report is set, a single wideband indication i1 can be reported and used for the entire CSI report band, and one subband indication i2 (e.g., subband indications of each subband) of each of more than one subband within that CSI report band can be reported.

[0155] The UE uses the received RS to perform channel estimation and estimates the channel matrix H. The UE then feeds back an index (PMI) determined based on the estimated channel matrix.

[0156] PMI can also represent a precoder matrix (also simply called a precoder) that the UE considers suitable for use in downlink (downlink (DL)) transmission for the UE. Each value of PMI can also correspond to a precoder matrix. The set of PMI values ​​can also correspond to a set of different precoder matrices called a precoder codebook (or simply a codebook).

[0157] In the space domain, a CSI report can also contain more than one type of CSI. For example, the CSI can include at least one of a first type (Type 1 CSI) used in single-beam selection and a second type (Type 2 CSI) used in multi-beam selection. Single-beam can also be rewritten as a single layer, and multi-beam can be rewritten as multiple beams. Furthermore, Type 1 CSI may not assume multiple-user multiple-input multiple-output (MU-MIMO), while Type 2 CSI may assume multi-user MIMO.

[0158] The codebook mentioned above may also include a codebook for Type 1 CSI (also known as Type 1 codebook, etc.) and a codebook for Type 2 CSI (also known as Type 2 codebook, etc.). In addition, Type 1 CSI may also include Type 1 single-panel CSI and Type 1 multi-panel CSI, and different codebooks (Type 1 single-panel codebook, Type 1 multi-panel codebook) may be specified for each.

[0159] In this disclosure, Type 1 and Type I can also be rewritten as each other. In this disclosure, Type 2 and Type II can also be rewritten as each other.

[0160] The uplink control information (UCI) type may also include at least one of the following: Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), scheduling request (SR), or CSI. UCI can be transmitted via either PUCCH or PUSCH.

[0161] In Rel.15 NR, UCI can include a CSI part for broadband PMI feedback. CSI report #n includes PMI broadband information when reported.

[0162] In Rel.15 NR, the UCI can include two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains one wideband PMI piece and several subband PMI pieces. CSI part 1 and CSI part 2 are encoded separately.

[0163] In Rel.15 NR, the UE is configured with N (N≥1) CSI report settings and M (M≥1) CSI resource settings by higher layers. For example, the CSI report configuration (CSI-ReportConfig) includes resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), and report quantity, etc. Each of the channel measurement resource settings, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference is associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource settings contain a list of CSI-RS resource sets (csi-RS-ResourceSetList, e.g., NZP-CSI-RS resource set or CSI-IM resource set).

[0164] (JT)

[0165] Joint transmission (JT) can also refer to the simultaneous transmission of data from multiple points (e.g., TRPs) to a single UE.

[0166] Rel.17 supports non-coherent joint transmission (NCJT) from two TRPs. PDSCH from the two TRPs can be precoded and decoded independently. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In the event of overlap, PDSCH from one TRP becomes interference to PDSCH from the other TRPs.

[0167] In Rel.18, coherent joint transmission (CJT, mTRP CJT) supporting up to four TRPs is under investigation. Data from the four TRPs can also be coherently precoded and transmitted to the UE on the same time-frequency resources. For example, channels from four TRPs can be considered, using the same precoding matrix. "Coherent" can also mean a certain relationship between the phases of multiple received signals. Four-TRP joint precoding can also be used to improve signal quality, with no interference between the four TRPs. Data can also be affected only by interference from sources outside the four TRPs.

[0168] (CJT CSI / Type 2 Codebook)

[0169] In the ideal scenario of four co-located TRPs (considered as the same location), joint estimation of the aggregated channel matrix H is possible, enabling feedback of the joint precoding matrix V. However, the large-scale path loss of the four paths can sometimes differ significantly. The joint precoding matrix V based on the constant module codebook is not accurate. In this case, the feedback of each TRP and the inter-TRP coefficients can be matched using the current Type 2 codebook of the NR.

[0170] For a CJT with a maximum of four TRPs in FR1, the selection of these four TRPs can also be semi-static. Therefore, the selection and the setting of the four channel measurement resources (CMRs, or four CSI-RS resources used for channel measurement) can also be semi-static. Dynamic indication of the four TRPs from a list of CSI-RS resources is also possible, but less likely.

[0171] The path loss from the four TRPs to the UE is different. Therefore, it is difficult to report only one converged CSI representing the joint channel matrix.

[0172] Consider the rollback operation to NCJT (i.e., single TRP), and also consider the CSI of each TRP (i.e., single TRP CSI like the NCJT CSI in Rel.17).

[0173] Envisioning an ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) targeting FR1 and up to four TRPs is under investigation. For CJT multi-TRP targeting FDD, improvements to the extended (Rel.16) type 2 codebook and the additional extended (Rel.17) type 2 PS codebook are being investigated.

[0174] For each TRP, W1 (the matrix representing the SD DFT vector) / W f (The matrix representing the FD DFT vector) can be either the same or different. W for each TRP l (NZC) can also be different. W1 / Wf / W for each TRP l Both options can be selected together, or each option can be selected individually. For W1 / W... f / W l The design is preferably based on different scenarios accompanying different options. φ It can be reported as a standalone piece of content, or it can be included in W. l The guidelines used are reported internally. These guidelines are related to the configuration scenario (e.g., intra-site multiple TRPs or inter-site multiple TRPs).

[0175] For example, the precoding matrix used for 4-TRP CJT CSI (codebook) can also be derived from W1 / W for each TRP. f / W l This indicates that W1 for each TRP can be the same or different, and can be selected jointly or individually. Wl for each TRP can also be different, and can be selected jointly or individually. For each TRP, W... f They can be the same or different; they can be chosen together or individually.

[0176] There are two codebook mode settings for FD base selection. In mode 1, in order to indicate the FD base offset corresponding to the j-th selected CSI-RS resource for j=2,...,N, i 1,9 Report. In Mode 2, i is not required. 1,9 Report. All CSI-RS resources have the same FD base selection.

[0177] - Mode 1 is a basis selection for SD / FD per TRP / per TRP group. This allows for independent FD basis selection across N TRPs / TRP groups. Here, N is the number of TRPs or TRP groups.

[0178] - Mode 2 is the SD-based selection for each TRP / TRP group (port group or resource) and the joint / common FD-based selection (across N TRP / TRP groups). Here, N is the number of TRPs or TRP groups.

[0179] In this disclosure, CSI-RS resources, CSI-RS resource sets, NZP CSI-RS resources, CMR, CJT CMR, and CSI-RS resources for channel measurement can also be rewritten.

[0180] In this disclosure, TRP and TRP groups can also be rewritten.

[0181] In both modes, detailed designs such as parameter combinations, substrate selection, TRP (group) selection, reference amplitude, and W2 quantization method can also be generalized.

[0182] For CJT using the enhanced Type II codebook (Type II CSI for CJT, Rel.18), the UE can also be set to the higher-level parameter codebookType as "typeII-CJT-r18". For CJT using the further enhanced Type II port selection codebook (Type II PS CSI for CJT, Rel.18), the UE can also be set to the higher-level parameter codebookType as "typeII-CJT-PortSelection-r18".

[0183] The UE can be configured with N within the resource set used for channel measurement. TRP ∈{1,2,3,4} CSI-RS resources.

[0184] In the CJT enhanced type 2 codebook, the high-level parameter paramCombination-CJT-L-r18 is set to {L1,...,L N_TRP The value of N L A set of combinations ∈ {1, 2, 4}. N L The value is set by the higher-level parameter numberOfSDCombinations.

[0185] In the CJT codebook with appended enhancement type 2 PS, the parameter paramCombination-CJT-PS-alpha-r18 is set to {α1,...,α...}. N_TRP The value of N LA set of combinations ∈ {1, 2, 4}. N L The value is set by the higher-level parameter numberOfSDCombinations-PS.

[0186] The UE can also be configured with the higher-layer parameter restrictedCMR-Selection. When restrictedCMR-Selection is configured, the number N of selected CSI-RS resources is N. TRP In cases where that is not the case, the UE expects to select N CSI-RS resources for 1 ≤ N ≤ NTRP, and this selection uses N TRP The bitmap of bits is reported.

[0187] In the SD beam selection / report, apply the SD beam selection / report per CSI-RS resource.

[0188] In CJT using an enhanced type 2 codebook, the precoding matrix represented by PMI is based on Σ j=1 N L σ_j +M v This is determined by a vector. Here, {σ1,...,σ N} is based on 1≤σ1<…<σ N ≤N TRP The indexes of N CSI-RS resources are selected in ascending order. TRP This can be either the number of CSI-RS resources set for CSI reporting or the number of TRPs used by CJT. σ_1 ,...,L σ_N} is from {L1,...,L N_TRP The value corresponding to the selected combination of}.

[0189] For j=1,...,N, i=0,1,...,L σ_j-1 The L corresponding to the j-th selected CSI-RS resource σ_j Vectors v m_1,f^(i),m_2,f^(i) via i 1,1 i 1,2 And is represented / reported. Here, i 1,1 i 1,2 It is given by the following formula.

[0190] i 1,1 =[i 1,1,1 ... i 1,1,N ]

[0191] i 1,1 ,j=[q 1,j q 2,j ]

[0192] q 1,j ∈{0,1,...,O1-1}

[0193] q 2,j ∈{0,1,...,O2-1}

[0194] i 1,2 =[i 1,2,1 ... i 1,2,N ]

[0195] i 1,2,j ∈{0,1,...,C(N1N2,L σ_j )-1}

[0196] In the CJT with append-enhanced type 2PS codebook, the precoding matrix represented by PMI is Σ j=1 N L σ_j +M vectors determine this. Here, {σ1,...,σ N} is based on 1≤σ1<…<σ N ≤N TRP The index of N CSI-RS resources is selected in ascending order. σ_j =K 1,σ_j / 2,K 1,σ_j =α σ_j P CSI-RS {α σ_1 ,...,α σ_N} is from {α1,...,α N_TRP The value corresponding to the selected combination of}.

[0197] For j=1,...,N, i=0,1,...,L σ_j-1 Based on L σ_j Vectors v m_j^(i) P from the j-th selected CSI-RS resource CSI-RS Select K from the ports 1,σ_j One port, via i 1,2 Indicate / report. Here, i 1,2 It is given by the following formula.

[0198] i 1,2 =[i 1,2,1 ... i 1,2,N ]

[0199] i 1,2,j ∈{0,1,...,C(P CSI-RS ,L σ_j )-1}

[0200] In this disclosure, CJT codebook, CJT type 2 codebook, CJT enhanced type 2 codebook, Rel.18CJT type 2 codebook, typeII-CJT-r18, CJT appended enhanced type 2PS codebook, Rel.18CJT type 2PS codebook, and typeII-CJT-PortSelection-r18' can also be rewritten in turn.

[0201] (Study #0: Unified TCI status for A-CSI-RS)

[0202] The investigation is underway to ensure that the indicated joint / DL TCI status can be applied only to the A-CSI-RS for CSI / beam management (BM), and not to the P / SP-CSI-RS. For P / SP-CSI-RS, the joint / DL TCI status is set per CSI-RS resource or per CSI-RS resource set.

[0203] [mDCI mTRP]

[0204] An extension to the unified TCI framework based on multiple DCI (M-DCI, mDCI) and multiple TRP (MTRP, mTRP) is under investigation. When the A-CSI-RS resource set used by CSI / BM is configured to follow the unified TCI state, in order to notify the UE to apply the first or second indicated joint / DL TCI state for that A-CSI-RS resource set, or for the CSI-RS resources within that A-CSI-RS resource set, it is possible to provide RRC settings for that A-CSI-RS resource set or for the CSI-RS resources within that A-CSI-RS resource set.

[0205] - The first or second indicated joint / DL TCI state corresponds to the indicated joint / DL TCI state specific to coresetPoolIndex values ​​0 and 1, respectively.

[0206] - The above setting method shall be applied at least when the offset between the final symbol of the PDCCH that triggers DCI transmission and the starting symbol of the A-CSI-RS resource in the A-CSI-RS resource set is above a threshold (where such threshold is required).

[0207] Whether RRC settings are supported for each CSI-RS resource set or for each CSI-RS resource depends on the UE's capabilities.

[0208] For A-CSI-RS, the RRC parameters {first, second} indicate the association between the TCI state and the CSI-RS resource set. The case where the offset is less than the threshold for UEs that do not support two default buffers will be discussed later.

[0209] [sDCI mTRP]

[0210] An extension to the unified TCI framework for MTRP based on single DCI (S-DCI, sDCI) is under investigation. When the A-CSI-RS resource set used by CSI / BM is configured to follow the unified TCI state, in order to notify the UE to apply the first or second indicated joint / DL TCI state for that CSI-RS resource, RRC settings can be provided in the CSI-AssociatedReportConfigInfo of CSI-AperiodicTriggerState for each CSI-RS resource set, or for each A-CSI-RS resource within each A-CSI-RS resource set.

[0211] - The above setting method shall be applied at least when the offset between the final symbol of the PDCCH that triggers DCI transmission and the starting symbol of the A-CSI-RS resource in the A-CSI-RS resource set is above a threshold (where such threshold is required).

[0212] Whether RRC settings are supported for each CSI-RS resource set or for each CSI-RS resource depends on the UE's capabilities.

[0213] The different DCI code points in the CSI request field indicate the {1st, 2nd} TCI status for A-CSI-RS. The default TCI status for A-CSI-RS (when the trigger offset is less than the threshold) will be described later.

[0214] Whether the association of {1st, 2nd} is per CSI-RS resource or per CSI-RS resource set can be set by NW.

[0215] (Study #1: Unified TCI state for CJT)

[0216] [Study #1-1]

[0217] Regarding extensions to the Unified TCI framework, PDSCH-CJT is being studied as a supported MTRP approach based on S-DCI. This will not hinder research into PDSCH-CJT designs specific to the Unified TCI framework, i.e., CJT reuse / repurposes S-DCIMTRP specifications.

[0218] [Studies #1-2]

[0219] Regarding the extension of the unified TCI framework, research is underway on enabling two joint TCI states to be indicated via MAC CE / DCI, and to be applied to CJT-based PDSCH reception (PDSCH-CJT) in BWP / CCs configured with joint DL / UL TCI modes. Whether PDSCH-CJT supports one or two joint TCI states depends on the UE's capabilities. Research is also underway on how to notify the UE which joint TCI state is applied to the target channel / signal within the BWP / CC. That is, the number of TCI states used in CJT can be one or two.

[0220] [Studies #1-3]

[0221] Regarding the extension of the unified TCI framework for S-DCI-based MTRP, it is under investigation (in the case that the UE supports the TCI states of the two indicated joint / DL for PDSCH-CJT), and the following two options are supported for PDSCH-CJT to apply the indicated joint TCI states of both.

[0222] - Option 1: PDSCH DMRS port and both indicate the joint TCI status of DL RS with respect to QCL type A and in QCL.

[0223] - Option 2: The PDSCH DMRS port and the DL RS indicating the joint TCI state are in QCL with respect to QCL type A other than the second QCL parameter {Doppler offset, Doppler extension} indicating the joint TCI state.

[0224] It can introduce UE capabilities related to which option is supported, and according to that UE capability, either of the two options mentioned above can be set via RRC.

[0225] In PDSCH-CJT, QCLs are supported for both SFN scheme A and SFN scheme B. Adding QCL rules (one for QCL type A and the other for QCL type B) is not supported.

[0226] (Study #2: CJT CMR)

[0227] [Study #2-1]

[0228] In use of N TRP In the Rel.18 type 2 codebook improvement of CJT multiple TRPs (mTRPs) with one TRP / TRP group, support for N with equal priority is being investigated. TRP={1,2,3,4}. That is, the maximum number of TRP / TRP groups is 4.

[0229] [Study #2-2]

[0230] In use of N TRP >In the improvement of the Rel.18 type 2 codebook of CJT mTRP for 1 TRP / TRP group, support for the following is under investigation.

[0231] - CMR has K > 1 NZP CSI-RS resources. One resource corresponds to one TRP / TRP group. That is, K = N TRP Multiple CSI-RS resources each have the same number of CSI-RS ports. One CMR is supported per TRP / TRP group.

[0232] [Studies #2-3]

[0233] In the Type 2 codebook improvement for CJT mTRP, it is being studied that the selection of N CSI-RS resources is performed by the UE and reported as part of the CSI report. Here, N∈{1,...,N} TRP N is the number of collaborative CSI-RS resources. TRP This is the maximum number of cooperative CSI-RS resources configured by the base station via higher-layer signaling. N TRP The selection of N CSI-RS resources from a set of CSI-RS resources is achieved through N in CSI Part 1. TRP The bitmap is reported. That is, the UE reports the TRP selection by bitmap representation. For example, when 4 TRPs are set, the UE can select the 1st and 3rd TRPs for CJT CSI reporting and report a bitmap indicating that the 1st and 3rd TRPs have been selected

[1010] . N is inferred based on the selection. This content is set by the base station or selected by the UE and does not affect L. n The relevant decision. N TRP The candidate values ​​are 1, 2, 3, and 4. Only one transmission hypothesis is reported. The UE is not required to calculate CSI for multiple transmission hypotheses.

[0234] That is, it supports both TRP setting by the base station (TRP not selected by the UE) and TRP selection by the UE. TRP selection by the UE is an optional function of the UE.

[0235] Study #1 defines a UE QCL assumption related to the PDSCHDMRS port during PDSCH decoding, assuming the number of TCI states is 1 or 2. However, is it necessary to set N? TRPIt is unclear whether (4 or fewer) CMRs are mapped to the setting TCI status / indication TCI status for PDSCH-CJT.

[0236] Considering that a maximum of two indicator TCI states can be applied to the DMRS of the PDSCH, and a maximum of four CMRs can be set, the DMRS of the CJT using the PDSCH and the CJT using the CMR are in the QCL. However, the constraints related to the QCL of the CJT using the CMR have not been fully studied. It is also considered that the DMRS of the CJT using the PDSCH and the CJT using the CMR are not required to be in the QCL. This could alleviate the constraints in this case.

[0237] As such, the QCL conception for CMR in CJT, or the unified TCI state (or indicative TCI state) for CJT, has not been adequately studied. If the QCL conception for CMR in CJT, or the unified TCI state (or indicative TCI state) for CJT, is not adequately studied, there are concerns that this could lead to a decrease in communication quality / throughput.

[0238] Therefore, the inventors of this invention studied the method for determining the QCL of CMR in CJT, or the application of the unified TCI state (or, indicating TCI state) for CJT, and came up with one way of this embodiment.

[0239] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, the following embodiments (e.g., various scenarios) can be used individually or in combination of at least two.

[0240] In this disclosure, "A / B" and "at least one of A and B" may be rewritten as each other. In addition, in this disclosure, "A / B / C" may also mean "at least one of A, B and C".

[0241] In this disclosure, the terms "activate," "deactivate," "indicate," "select," "configure," "update," and "determine" can be overridden. Similarly, the terms "support," "control," "capable of control," "operate," and "capable of operation" can also be overridden.

[0242] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-level parameters, information elements (IEs), settings, etc., can also be modified interchangeably. In this disclosure, Medium Access Control (MAC) control elements (MAC control elements (CEs), update commands, activation / deactivation commands, etc., can also be modified interchangeably.

[0243] In this disclosure, higher-layer signaling may be any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc. In this disclosure, RRC signaling, RRC IE, RRC parameters, and higher-layer parameters may also be rewritten.

[0244] In this disclosure, MAC signaling may also use, for example, a MAC Control Element (MACCE) or a MAC Protocol Data Unit (PDU). Broadcast information may also be, for example, a Master Information Block (MIB), a System Information Block (SIB), a Minimum System Information (Remaining Minimum System Information (RMSI)), or Other System Information (OSI).

[0245] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0246] In this disclosure, a b The expressions a, b, and b appended to the right of a can also be rewritten. In this disclosure, a c The expressions a^c and a with c appended to the upper right of a can also be rewritten interchangeably. In this disclosure, a b cThe expressions `a_b^c`, `a_b^c` (appending `b` to the lower right and `c` to the upper right of `a`), and `ceil(x)`, `ceiling`, and `ceiling` functions can also be rewritten. Similarly, `floor(x)`, `floor`, and `floor` functions can be rewritten. Furthermore, `sqrt(x)` and `root` functions can be rewritten. In this disclosure, x... ~ It can be represented by appending ~ above x, or it can be called an x ​​tilde. In this disclosure, x - It can be represented by adding a hyphen above the x, or it can be called an x-bar.

[0247] In this disclosure, the constraints that A performs B, the limitation that A performs B, the UE's expectation / imagination that A performs B, and the UE's non-expectation / imagination that A does not perform B can also be rewritten.

[0248] In this disclosure, CSI-RS, CSI-RS resources, CSI-RS resource sets, CSI-RS settings, resources for time and frequency of CSI-RS, CSI-RS ports, CSI-RS antenna ports, P / SP / A-CSI-RS resources, NZP CSI-RS resources, and CMR can also be rewritten.

[0249] (Wireless communication method)

[0250] <Implementation Method A0>

[0251] Regarding the constraints between CMR and TCI state / RS, consider the following two scenarios.

[0252] - Scenario 1: If at least one of the CMR and TCI states is set in the RRC IE, consider the constraint between the CMR and the set / activated TCI state (pair). Alternatively, if no TCI state is set for the CMR, consider the QCL (QCL assumption / determination made by the UE) of the CMR.

[0253] - Scenario 2: Consider the constraints when applying one or two indicator TCI states (and when the indicator TCI states are applied to P / SP / A-CSI-RS resources for channel measurement).

[0254] <Implementation Method A1>

[0255] This implementation method mainly involves scenario 1.

[0256] Several CSI-RS resources (CMRs) configured for channel measurement and TCI states for CJT can also follow at least one of the following options.

[0257] - Option 0

[0258] It is also possible that there is no N to be set. TRP The constraint / conception of mapping (4 or fewer) CMRs to the indication (setting / activation) TCI states used for PDSCH-CJT. In this case, up to 4 CMRs (CSI-RS resources for channel measurement, e.g., CMR #1, #2, #3, #4) can also be set to be associated with different up to 4 TCI states (e.g., TCI states #a, #b, #c, #d) respectively (different up to 4 TCI states can also be set separately for the up to 4 CMRs). The constraint can be that at least one of the 4 TCI states is an indication TCI state (for CJT), or at least two of the 4 TCI states are indication TCI states (for CJT).

[0259] exist Figure 1A In the example of option 0, CMR#1, #2, #3, and #4 are associated with TCI states #a, #b, #c, and #d, respectively.

[0260] - Option 1

[0261] It is also possible that all CSI-RS resources (CMRs, e.g., CMRs #1, #2, #3, #4) configured for channel measurement share the same TCI state (e.g., TCI state #a). It is also possible that all CSI-RS resources configured for channel measurement are associated with the same SSB / CSI-RS as a QCL source RS in a TCI state.

[0262] This option can also be constrained by at least one of the following: UE-based assumptions, RRC-based settings, and definitions in the specification. For example, the UE may assume / determine that the antenna ports of all CSI-RS resources configured for channel measurement are in QCL with the same SSB / CSI-RS as a QCL source RS in a TCI state. Alternatively, all CSI-RS resources configured for channel measurement may be configured with the same SSB / CSI-RS as a QCL source RS in a TCI state. In this option, the TCI state (e.g., TCI state #a) may also be an indicator TCI state (for CJT).

[0263] exist Figure 1BIn the example of option 1, CMR#1, #2, #3, and #4 are all associated with the same TCI state #a.

[0264] - Option 2

[0265] It is also possible that all CSI-RS resources (CMRs, e.g., CMR#1, #2, #3, #4) configured for channel measurement share the same one or two TCI states (e.g., TCI states #a, #b). It is also possible that all CSI-RS resources configured for channel measurement are associated with the same one or two SSB / CSI-RS as QCL source RSs that are one or two TCI states. When all CSI-RS resources are associated with two TCI states, this option may also follow at least one of the following options 2-x.

[0266] -- Option 2-1: Associate all CMRs with the two DL RSs in the TCI state related to QCL type A / in QCL.

[0267] -- Option 2-2: Associate all CMRs with the two DL RSs within the TCI state except for the second indicator {Doppler offset, Doppler extension} which indicates the TCI state.

[0268] This option can also be constrained by at least one of the following: UE-based assumptions, RRC-based settings, and definitions in the specification. For example, the UE may assume / determine that the antenna ports of all CSI-RS resources configured for channel measurement are in QCL with the same one or two SSB / CSI-RS as QCL source RSs in one or two TCI states. Alternatively, all CSI-RS resources configured for channel measurement may be configured with the same one or two SSB / CSI-RS as QCL source RSs in one or two TCI states. In this option, the one or two TCI states (e.g., TCI states #a / #b) may also be one or two indicator TCI states (for CJT).

[0269] exist Figure 1C In the example of option 2, CMR#1, #2, #3, and #4 are all associated with the same two TCI states #a and #b.

[0270] - Option 3

[0271] Alternatively, several CSI-RS resources (CMRs, e.g., CMR#1, #2, #3, #4) configured for channel measurement can be associated with the first indication (active) TCI state of a pair of TCI states from CJT, and the remaining CSI-RS resources configured for channel measurement can be associated with the second indication (active) TCI state of a pair of TCI states from CJT. The association between CMRs and TCI states can also be determined by at least one of the following options 3-x.

[0272] -- Option 3-1: RRC signaling. For example, the RRC IE can also configure the association between CSI-RS resources and TCI states. Alternatively, more than one CSI-RS resource can be associated with the same TCI state. For example, the RRC IE can also configure the association between a CSI-RS resource and other RSs (e.g., SSB / CSI-RS). This RS can also be the QCL source RS for the TCI state.

[0273] -- Option 3-2: Rule-based or UE-based assumption. For example, the initial X CSI-RS resources could be associated with the first indication (active) TCI state used by CJT, and the remaining CSI-RS resources associated with the second indication (active) TCI state used by CJT. X can be either 1 or ceil(N) TRP / 2), or floor(N) TRP / 2). For example, the UE may also follow this rule, assuming / determining that the antenna ports of the initial X CSI-RS resources are in QCL with the RS in the first indication (active) TCI state used by CJT, and assuming / determining that the antenna ports of the remaining CSI-RS resources are in QCL with the RS in the second indication (active) TCI state used by CJT.

[0274] In this option, TCI status #a / #b can also be one or two indicators of TCI status (for CJT).

[0275] exist Figure 1D In the example of option 3, CMRs #1 and #2 are associated with a TCI state #a, and CMRs #3 and #4 are associated with another TCI state #b.

[0276] For P / SP / A-CSI-RS used for channel measurement, you can apply the same options from the above options, or you can apply different options from the above options.

[0277] - Change

[0278] Consider changes based on Option 1 / 2 / 3. There can also be such a constraint: at least one CMR out of 4 (N TRP (for example, in Option 3, at least 2 CMRs) is associated with an indication of TCI state (for example, TCI state #a). There can also be such a constraint: at least one CMR out of 4 CMRs (for example, in Option 3 Option 3, at least 2 CMRs) is associated with 2 indications of TCI states (for example, TCI states #a, #b). There may be no constraint for the remaining CMRs.

[0279] In Figure 2A an example of a change in Option 1, CMRs #3 and #4 in the aforementioned example of Option 1 ( Figure 1B ) are respectively associated with other TCI states #e and #f. At least one of the TCI states #a, #e, #f can be either an indication of TCI state or the same as in Option 0.

[0280] In Figure 2B an example of a change in Option 2, CMRs #2 and #3 in the aforementioned example of Option 2 ( Figure 1C ) are associated with 2 other TCI states #e and #f, and CMR #4 in the aforementioned example of Option 2 is also associated with 2 other TCI states #g and #h. At least one of the pairs of TCI states #a, #b, the pair of TCI states #e, #f, and the pair of TCI states #g, #h can also correspond to 2 indications of TCI states.

[0281] In Figure 2C an example of a change in Option 3, CMRs #2 and #3 in the aforementioned example of Option 3 ( Figure 1D ) are respectively associated with other TCI states #e and #f. At least 2 of the TCI states #a, #b, #e, #f can also correspond to 2 indications of TCI states.

[0282] According to this embodiment, the UE can appropriately determine the relationship between CMR and TCI state for CJT.

[0283] [[ID=Z29]]<Embodiment A2>

[0284] This embodiment mainly relates to Case 2. [[ID=Z33]]

[0285] <<A-CSI-RS Resource>>

[0286] When the A-CSI-RS resource for CMR set as CJT is configured to follow the Unified TCI state, or when the RRC parameter indicating the first or second is set for each CSI-RS resource or each set of CSI-RS resources, the application indicating the TCI state may also follow at least one of the following options.

[0287] - Option 1 (Applying a case that indicates the TCI status)

[0288] This indicator TCI state is applied to the set N. TRP All of the CMRs.

[0289] - Option 2 (Applying two indicators of TCI status)

[0290] These two indicators of TCI status are applied to the set N. TRP All of the CMRs. This option may also follow at least one of the following options 2-x.

[0291] -- Option 2-1: Associate all CMRs with the two DL RSs in the TCI state related to QCL type A / in QCL.

[0292] -- Option 2-2: Associate all CMRs with the two DL RSs within the TCI state except for the second indicator {Doppler offset, Doppler extension} which indicates the TCI state.

[0293] - Option 3 (Applying two indicators of TCI status)

[0294] The first of the two TCI states is applied to the set N. TRP Of the CMRs, the second TCI state in the two indicated TCI states is applied to the set N. TRP The remaining CMRs in the CMRs. The association between CMRs and TCI states can also be determined by at least one of the following options 3-x.

[0295] -- Option 3-1: RRC signaling. For example, RRC IE can also configure the association between CSI-RS resources and the first or second TCI state.

[0296] -- Option 3-2: Rules or UE-based assumptions. For example, it could also be N. TRPThe first X CSI-RS resources (CMR) in a CMR are associated with the first (activated) TCI state for CJT, N TRP The remaining CSI-RS resources (CMR) in the N CMRs are associated with the second (activated) TCI state for CJT. X can be either 1, or ceil(N TRP / 2), or floor(N TRP / 2).

[0297] - Variation

[0298] Consider variations based on Option 1 / 2 / 3. One indicated TCI state can also be applied to at least one CMR among the N TRP CMRs (e.g., in Option 3, at least 2 CMRs). Two indicated TCI states can also be applied to at least one CMR among the N TRP CMRs (e.g., for Option 3, 2 CMRs).

[0299] <<P / SP-CSI-RS resource>>

[0300] The P / SP-CSI-RS resource set as the CJT CMR can also follow at least one of the following options.

[0301] - Option a

[0302] Only for the CJT CMR, support the setting that the P / SP-CSI-RS resource follows a unified TCI state (followUnifiedTCIstate). When followUnifiedTCIstate is set for the P / SP-CSI-RS resource, the P / SP-CSI-RS resource can also follow Option 1 / 2 / 3 for the aforementioned A-CSI-RS resource.

[0303] - Option b

[0304] Do not support the setting that the P / SP-CSI-RS resource set as the CJT CMR follows a unified TCI state (followUnifiedTCIstate). The TCI state for the P / SP-CSI-RS resource can also be set via RRC. When the RRC IE sets the TCI state for the P / SP-CSI-RS resource, whether there are restrictions between the CMR and the TCI state / RS can also be the same as in Embodiment 1.

[0305] Both Implementation A1 and Implementation A2 can be applied to P / SP / A-CSI-RS CMR. Implementation A1 and Implementation A2 can also be applied to different CMRs configured for different settings of the time-domain behavior using P / SP / A.

[0306] According to this implementation, the UE / base station can appropriately apply TCI status to the P / SP / A-CSI-RS resources used for channel measurement in CJT.

[0307] <Analysis>

[0308] As mentioned above, regarding CJT CSI reports, it is envisioned that a maximum of four CMRs can be configured, with each CMR associated with one TRP. Furthermore, regarding CJT-PDSCH, it is envisioned that one or two indicated TCI states can be configured, while no TCI states can be configured for PDSCH. The indicated TCI states can be indicated via at least one TCI state field in RRC, MAC CE, or DCI format.

[0309] Regarding CJT CMR, in the case of applying A / SP / P-CSI-RS, based on the rules of CSI-RS for the unified TCI status, the following can also be envisioned.

[0310] Regarding A-CSI-RS, the first indication combined / DLTCI or the second indication combined / DL TCI (e.g., 1) is selected by triggering DCI (e.g., triggering DCI). st or 2 nd Indicated joint / DL TCI).

[0311] Regarding P / SP-CSI-RS, the combined / DL TCI status is set per CSI-RS resource (or, the CSI-RS resource set is set).

[0312] Therefore, it is also envisioned that the indicated joint / DL TCI (e.g., indicating TCI status) is applied only to A-CSI-RS (or, a structure that supports application to P / SP-CSI-RS).

[0313] In this case, when the PDSCH of CJT is set / supported and the CMR (or the CSI-RS resource used by CJT) is set, it is unclear how to control / set the QCL / TCI state related to PDSCH / CMR. Therefore, the following implementation method 0 / implementation method 1 can also be applied.

[0314] <Implementation Method 0>

[0315] Implementation 0 relates to an example of PDSCH and QCL for CMR applications that support CJT.

[0316] The PDSCH set / applied / supported by CJT can also be in QCL (reference) with at least one (or part / all) of the CMR used in CJT CSI reporting (e.g., the CMR used by CJT). Figure 3 ).exist Figure 3 The diagram shows a case where two CMRs (e.g., CMRs used by CJT) are set for CJT CSI reporting, but the number of CMRs used by CJT is not limited to this.

[0317] The association / restriction of this QCL can also vary based on specific conditions. These specific conditions can also include at least one of conditions 0-1 to 0-3 below. In the following description, the indicated TCI state can also be overridden with the indicated combined / DL TCI state or the combined / DL TCI state.

[0318] [Condition 0-1]

[0319] Specific conditions can also be the number of TCI states indicated by the PDSCH used by CJT.

[0320] When the PDSCH used by CJT is indicated by a TCI status, the PDSCH set to be used by CJT can also be in QCL with all (or at least one) of the CMRs used for CJT CSI reporting.

[0321] When the PDSCH used by CJT is indicated by two TCI states, one or both of the TCI states of the PDSCH used by CJT may also be in QCL along with all (or at least one / part) of the CMR used by CJT CSI reporting.

[0322] [Conditions 0-2]

[0323] Specific conditions can also be the number of CMR resources used for CJT reporting.

[0324] When the number of CMRs is 1, the CMR can also be in the QCL with the PDSCH. When the number of CMRs is more than 1, at least some (or at least one) CMRs can also be in the QCL with the PDSCH.

[0325] Here, the case where the number of CMRs is 1 is distinguished from the case where there are more than 1, but it is not limited to this. As another example, the case where the number of CMRs is 2 is also distinguished from the case where there are more than 2 (for example, the case where the number of TCI states indicated by PDSCH is 2).

[0326] For example, if the number of CMRs is 2 and the number of TCI states indicating the PDSCH is 2, then the two CMRs can also have a QCL with the PDSCH. In other cases, at least some (or at least one) of the CMRs can also have a QCL with the PDSCH.

[0327] [Conditions 0-3]

[0328] Specific conditions can also be the number of TCI states set for / associated with CMR resources used for CJT reporting.

[0329] When the number of TCI states assigned to / associated with CMR resources used for CJT reporting is 1, PDSCH set for CJT reporting can also be in QCL with all (or at least one) of the CMRs used for CJT CSI reporting.

[0330] If the number of TCI states assigned to / associated with CMR resources used for CJT reporting is more than one (or multiple), the PDSCH assigned to CJT may also be in QCL with a portion (or at least one) of the CMRs used for CJT CSI reporting.

[0331] Similarly, as another example, it can be distinguished between the case where the number of TCI states of the CMR is 2 and the case where it is greater than 2 (e.g., the case where the number of indicator TCI states for the PDSCH is 2). For example, when the number of TCI states of the CMR is 2, the PDSCH used by the CJT can also be in QCL with all (or at least) of the CMR. In other cases, the PDSCH used by the CJT can also be set to QCL with some (or at least) of the CMR.

[0332] <Implementation Method 1>

[0333] Implementation 1 relates to an example of the application / setting of PDSCH for CJT-supported applications and the TCI status when CMR for CJT CSI reporting is set. Implementation 1 can be applied alone or in combination with Implementation 0.

[0334] When PDSCH is set to CJT use and at least one of CMR is set to CJT CSI reporting use, at least one of the following options 1-1 to 1-5 may also be applied.

[0335] [Option 1-1]

[0336] You can also apply the indicated TCI state (e.g., the indicated joint / DL TCI state) to P / SP-CSI-RS.

[0337] In this case, the structure shown in embodiment A2 can also be applied.

[0338] [Options 1-2]

[0339] At least one (or all) of the CMR’s TCI state (e.g., configured / indicated joint / DL TCI state) can also be applied to the PDSCH that has been configured with CJT.

[0340] In the case where the CMR is set to the P / SP-CSI-RS with the joint / DL TCI state, or in the case where the CMR is not set to follow the indicated TCI state with the A-CSI-RS, the UE can also receive the PDSCH (e.g., the PDSCH used by the CJT) through the set TCI state (e.g., configured TCI state(s)).

[0341] The number of different joint / DL TCI states for CMR can also be limited to a maximum of 2 (or less). When more than 2 TCI states are set across all CMRs, the UE can also select a maximum of 2 TCI states through specific rules or higher-layer / RRC settings. Specific rules could be, for example, a lower TCI ID and at least one TCI associated with a lower CMR / CSI-RS ID.

[0342] Options 1-2 (or the limitation on the number of different joint / DL TCI states for CMR in Options 1-2) can also be applied when the scheduling offset of the PDSCH used by CJT is above a certain threshold. When the scheduling offset of the PDSCH used by CJT is less than the certain threshold, if the UE supports buffering UE capability, the UE can also buffer the received signal using two TCI state indicators; if the UE does not support buffering UE capability, the UE can also buffer the received signal using one TCI state indicator.

[0343] It is also possible that the UE will not be able to buffer received signals other than those indicating TCI states. In this case, as described above, options 1-2 (or the limitation on the number of different joint / DL TCI states for CMR in options 1-2) can also be applied when the scheduling offset of the PDSCH used for CJT is above a certain threshold. That is, when the PDSCH is set for CJT use and at least one of the CMRs is set for CJT CSI reporting, the UE may not expect / intend to receive the PDSCH used for CJT if the scheduling offset is less than the threshold.

[0344] When the CMR is set to follow the Unified TCI State (e.g., followUnifiedTCIState) of the A-CSI-RS, the UE can also receive the PDSCH (e.g., the PDSCH used by CJT) through one of the indicated joint / DL TCI states.

[0345] [Options 1-3]

[0346] For CMR used in CJT, it is also possible to support only A-CSI-RS.

[0347] The UE may also not expect / envision that P / SP-CSI-RS, A-CSI-RS which is not set to follow the TCI indication state, is set to CMR for CJT.

[0348] Therefore, the indicated combined / DL TCI status can be easily applied to both the PDSCH used for CJT and the CMR used for CJT.

[0349] [Options 1-4]

[0350] The indicator TCI state applied to PDSCH can also be the same as the configured TCI state of CMR.

[0351] The possibility that the network (e.g., the base station) indicates the same TCI state ID as that assigned to the CSI-RS / SP-CSI-RS is also considered. The UE may also not expect / envision that the indicated joint / DLTCI state for the PDSCH used by the CJT differs from the TCI state assigned to the CSI-RS used by the CMR. This could also mean that, if the base station wishes to utilize the functionality of both the PDSCH used by the CJT and the CMR used by the CJT, the base station cannot update the TCI state indicated via MAC CE / DCI.

[0352] [Options 1-5]

[0353] When the TCI for CMR is set via RRC, several additional TCI states (e.g., candidate TCIs) can be further set for CMR via RRC. In this case, the indicator TCI (e.g., the indicator TCI applied to PDSCH) can also be the same as one of the TCI states set for CMR. The TCI set for CMR can also include candidate TCIs.

[0354] Similarly, as other examples, it can be distinguished between the case where the number of TCI states of the CMR is 2 and the case where it is greater than 2 (e.g., the case where the number of indicator TCI states for the PDSCH is 2). For example, when the number of TCI states of the CMR is 2, the PDSCH used by the CJT can also be in the QCL with all (or at least) of the CMR. In other cases, the PDSCH used by the CJT can also be in the QCL with several (or at least) of the CMR.

[0355] <Supplement>

[0356] [Information notification to UE]

[0357] The notification of any information from the Network (NW) (e.g., the reception of any information from the BS in the UE) in the above-described embodiments can also be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or combinations thereof.

[0358] In the case of notification via MAC CE, the MAC CE can also be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in the existing standard.

[0359] When the above notification is made via DCI, the notification can also be made through specific fields of the DCI, the Radio Network Temporary Identifier (RNTI) used in the scrambling of the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0360] Furthermore, the notification of any information to the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0361] [Notification from UE]

[0362] The notification of any information from the UE (to the NW) in the above embodiments (in other words, the transmission / reporting of any information from the UE to the BS) can also be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or combinations thereof.

[0363] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new LCID in the MAC subheader that is not specified in the existing standard.

[0364] In cases where the above notification is sent via UCI, the above notification may also be sent using PUCCH or PUSCH.

[0365] Furthermore, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0366] [Regarding the application of each implementation method]

[0367] At least one of the above-described implementation methods can also be applied under certain conditions. These specific conditions can be specified in the standard or communicated to the UE / BS using higher-layer signaling / physical layer signaling.

[0368] The specific conditions mentioned above can also represent at least one of the following:

[0369] -Activated by setting at least one of the above-described embodiments.

[0370] At least one of the above-described implementation methods may also be applied only to UEs that have reported a specific UE capability or support that specific UE capability.

[0371] This specific UE capability can also represent at least one of the following:

[0372] - Supports specific processing / operation / control / information regarding at least one of the above embodiments.

[0373] - The UE supports the definition and setting of at least one association between the configured CSI-RS resource / CMR for CJT and the indicated (activated) TCI state. Separate UE capabilities may also be introduced for each option of each implementation. Separate UE capabilities may also be introduced for P / SP / A-CSI-RS resources configured for CSI.

[0374] - The UE supports applying the TCI indication state to the configured CSI-RS resources / CMR. How the UE applies the TCI indication state to the configured CSI-RS resources / CMR. Separate UE capabilities can also be introduced for each option of each implementation. Separate UE capabilities can also be introduced for P / SP / A-CSI-RS resources configured for CSI.

[0375] Furthermore, the aforementioned specific UE capabilities can be capabilities applied across the entire frequency range (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SCS), or capabilities for each feature set (FS) or feature set per component-carrier (FSPC).

[0376] Furthermore, the aforementioned specific UE capabilities can be either capabilities that apply to all duplex modes (common to duplex modes) or capabilities that apply to each duplex mode (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

[0377] Furthermore, at least one of the above embodiments can also be applied when the UE is set / activated / triggered by specific information associated with the above embodiments (or performs the operations of the above embodiments) via higher-layer signaling / physical layer signaling. This specific information can also represent at least one of the following:

[0378] - Indicates activation / deactivation information for the operation of the above implementation method.

[0379] - RRC parameters for a specific version (e.g., Rel.18 / 19). These RRC parameters can also have a name that appends "r18" or "r19" to the name of an existing RRC parameter.

[0380] The UE may also apply Rel.15 / 16 operations if it does not support at least one of the specific UE capabilities mentioned above, or if the specific information mentioned above is not set.

[0381] (Postscript)

[0382] With respect to one embodiment of this disclosure, the following invention is noted.

[0383] [Postscript 1]

[0384] A terminal having:

[0385] The receiving unit receives information relating to the setting of at least one Channel State Information Reference Signal (CSI-RS) resource for channel measurements used in Coherent Joint Transmission (CJT); and

[0386] The control unit, during the reception of the downlink shared channel (PDSCH) corresponding to the CJT, determines the quasi-co-addressability of the PDSCH and the CSI-RS resources based on at least one of the number of transmission configuration indicators (TCI) for the PDSCH, the number of CSI-RS resources, and the number of TCI states corresponding to the CSI-RS.

[0387] [Postscript 2]

[0388] The terminal as described in Appendix 1, wherein,

[0389] The receiving unit receives information related to the TCI status.

[0390] The control unit applies the indicated TCI state to at least one of the periodic CSI-RS and the semi-persistent CSI-RS.

[0391] [Postscript 3]

[0392] As described in Appendix 1 or Appendix 2, the control unit applies at least one setting TCI state and indicating TCI state corresponding to the at least one CSI-RS to the PDSCH.

[0393] [Postscript 4]

[0394] The terminal as described in any of Appendix 1 to Appendix 3, wherein the indication TCI state applied to the PDSCH is the same as the setting TCI corresponding to the CSI-RS.

[0395] (Wireless communication system)

[0396] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0397] Figure 4This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 (also referred to simply as System 1) may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5GNR) as standardized by the Third Generation Partnership Project (3GPP).

[0398] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also 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.

[0399] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0400] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity between NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0401] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0402] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0403] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these; for example, FR1 can also correspond to a frequency band higher than FR2.

[0404] In addition, in each CC, the user terminal 20 may also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) for communication.

[0405] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc. based on Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0406] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0407] The core network 30 may also include, for example, user plane functions (UPF), access and mobility management functions (AMF), session management functions (SMF), unified data management (UDM), application functions (AF), data network (DN), location management functions (LMF), and network functions (NF) such as operation, administration and maintenance (OAM). Alternatively, multiple functions can be provided through a single network node. Furthermore, communication with external networks (e.g., the Internet) can also be achieved via the DN.

[0408] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0409] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0410] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0411] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0412] In addition, in the wireless communication system 1, the uplink channel can also be the shared uplink channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), the random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20, etc.

[0413] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. In addition, Master Information Blocks (MIBs) can also be transmitted via the PBCH.

[0414] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0415] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can be rewritten as DL data, and PUSCH can be rewritten as UL data.

[0416] In PDCCH detection, a Control Resource Set (CORESET) and a search space can also be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0417] A search space can also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" etc. disclosed herein can be rewritten interchangeably.

[0418] The PUCCH can also transmit uplink control information (uplink control information (UCI)) that includes at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat Request ACK Knowledge (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The PRACH can also transmit random access preambles used for establishing connections with the cell.

[0419] Additionally, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, it may be stated that the word "physical" is not included at the beginning of various channels.

[0420] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, DL-RS can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS).

[0421] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. can also be called reference signals.

[0422] Furthermore, in wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0423] (Base station)

[0424] Figure 5 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0425] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0426] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0427] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0428] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0429] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0430] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0431] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0432] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of the transmitting beam and the receiving beam.

[0433] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0434] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0435] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0436] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received through the transmitting and receiving antenna 130 into the baseband signal.

[0437] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0438] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also 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 can also be output to the control unit 110.

[0439] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 (e.g., the network node providing the NF), other base stations 10, etc., and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0440] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0441] The transmit / receive unit 120 can also transmit information related to the setting of at least one channel state information reference signal (CSI-RS) resource for channel measurement used in coherent joint transmission (CJT). The control unit 110 can also, during the transmission of the downlink shared channel (PDSCH) corresponding to CJT, control the quasi-co-addressing of the PDSCH and CSI-RS resources based on at least one of the number of transmission configuration indicators (TCIs) for the PDSCH, the number of CSI-RS resources, and the number of TCI states corresponding to the CSI-RS.

[0442] (User terminal)

[0443] Figure 6 This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0444] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0445] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0446] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0447] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0448] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0449] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0450] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0451] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0452] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0453] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0454] Furthermore, whether or not to apply DFT processing can be based on the settings of transform precoding. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above in order to transmit the channel using the DFT-s-OFDM waveform. If not, the transmit / receive unit 220 (transmit processing unit 2211) can perform the above transmission processing without performing DFT processing.

[0455] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0456] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, demodulate, etc., the signals of the wireless frequency band received by the transmitting and receiving antenna 230.

[0457] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to obtain user data.

[0458] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also 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 can also be output to the control unit 210.

[0459] Additionally, the measurement unit 223 can also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources can be, for example, non-zero power (NZP) CSI-RS resources. Furthermore, the measurement unit 223 can also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources can be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. Additionally, CSI-IM can also be referred to as CSI-Interference Management (IM), and can be interchanged with zero power (ZP) CSI-RS. Furthermore, in this disclosure, CSI-RS, NZP CSI-RS, and ZP... CSI-RS CSI-IM, CSI-SSB, etc., can also be interchanged.

[0460] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0461] The transmit / receive unit 220 can also receive information relating to the setting of at least one Channel State Information Reference Signal (CSI-RS) resource for channel measurements used in Coherent Joint Transmission (CJT). The transmit / receive unit 220 can also receive information relating to the indication of TCI status via DCI / MAC CE / RRC parameters.

[0462] The control unit 210 can also determine the quasi-co-addressability of the PDSCH and CSI-RS resources during the reception of the downlink shared channel (PDSCH) corresponding to the CJT, based on at least one of the number of transmission configuration indicators (TCI) for the PDSCH, the number of CSI-RS resources, and the number of TCI states corresponding to the CSI-RS.

[0463] The control unit 210 may also apply the indication of TCI status to at least one of the periodic CSI-RS and the semi-persistent CSI-RS.

[0464] The control unit 210 may also apply at least one setting TCI state corresponding to at least one CSI-RS and at least one indication TCI state to the PDSCH.

[0465] The indicator TCI state applied to PDSCH can also be the same as the setting TCI corresponding to CSI-RS.

[0466] (Hardware structure)

[0467] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0468] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. Each of these, as described above, is not particularly limited in its implementation method.

[0469] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 7This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007, etc.

[0470] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit can be interchanged. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0471] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0472] Regarding the functions in base station 10 and user terminal 20, for example, by reading specific software (programs) into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls communication via communication device 1004, or by controlling at least one of reading and writing data in memory 1002 and storage device 1003.

[0473] The processor 1001 enables the operating system to operate and control the computer as a whole. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0474] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001; similar implementations can be made for other functional blocks.

[0475] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0476] Storage device 1003 may also be a computer-readable recording medium, such as a flexible disc, floppy disk, optical disk (e.g., a compact disc ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk drive, smart card, flash memory device (e.g., a card, stick, key drive), magnetic stripe, database, server, or at least one other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0477] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0478] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., a touch panel).

[0479] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0480] Furthermore, the base station 10 and the user terminal 20 can also 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 can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0481] (Modified example)

[0482] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be interchanged. Additionally, a signal may also be a message. A reference signal can also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0483] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0484] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0485] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). In addition, a time slot can also be a time unit based on a set of parameters.

[0486] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0487] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be interchanged.

[0488] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but rather a time slot, mini-time slot, etc.

[0489] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0490] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0491] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0492] A TTI with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0493] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be rewritten as a TTI with a duration of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be rewritten as a TTI with a duration of less than a long TTI but more than 1 ms.

[0494] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0495] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0496] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0497] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0498] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0499] A BWP can also include a UL BWP (the BWP used by UL) and a DL BWP (the BWP used by DL). For a UE, one or more BWPs can also be set within a single carrier.

[0500] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Additionally, terms such as "cell" and "carrier" in this disclosure may be replaced with "BWP".

[0501] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0502] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0503] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0504] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0505] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0506] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0507] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB) etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0508] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0509] Furthermore, notification of specific information (e.g., a notification of “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0510] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0511] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0512] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0513] The terms “system” and “network” as used in this disclosure are interchangeable. “Network” may also mean devices included in a network (e.g., base stations).

[0514] In this disclosure, the terms “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”, “beamwidth”, “beam angle”, “antenna”, “antenna element”, “panel”, “UE panel”, “transmitting entity”, and “receiving entity” are used interchangeably.

[0515] Furthermore, in this disclosure, the antenna port can also be rewritten with an antenna port used for any signal / channel (e.g., a DeModulation Reference Signal (DMRS) port). In this disclosure, resources can also be rewritten with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Additionally, resources can also include time / frequency / code / space / power resources. Moreover, the spatial domain transmission filter can also include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0516] The aforementioned groups may include, for example, at least one of the following: spatial relation group, code division multiplexing (CDM) group, reference signal (RS) group, control resource set (CORESET) group, PUCCH group, antenna port group (e.g., DMRS port group), layer group, resource group, beam group, antenna group, panel group, etc.

[0517] Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), RS, etc., can also be rewritten to each other.

[0518] Furthermore, in this disclosure, the TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, and joint TCI state can also be rewritten to each other.

[0519] Furthermore, in this disclosure, terms such as "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL property (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) property", and "specific QCL type (e.g., type A, type D)" can be rewritten interchangeably.

[0520] In this disclosure, indexes, identifiers (IDs), indicators, indications, resource IDs, etc., can be interchanged. Sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[0521] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can be interchanged. "Spatial relationship information (TCI state)" can also be interchanged with "a set of spatial relationship information (TCI states)," "one or more spatial relationship information," etc. TCI state and TCI can also be interchanged. Spatial relationship information and spatial relationships can also be interchanged.

[0522] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0523] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its overall coverage area can be divided into several smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0524] In this disclosure, the fact that the base station sends information to the terminal can also be modified to mean that the base station instructs the terminal to perform control / operation based on that information.

[0525] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0526] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0527] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be equipment mounted on a moving object, the moving object itself, etc.

[0528] The term "mobile body" refers to a movable object whose speed is arbitrary, including situations where the body is stationary. Examples of such mobile bodies include vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but are not limited to these. Furthermore, the mobile body can also be a mobile body that moves autonomously based on operational commands.

[0529] The mobile entity can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile entity moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0530] Figure 8 This is a diagram illustrating an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a speed sensor 51, a 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.

[0531] The drive unit 41 is comprised of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also called a steering handle) that steers at least one of the front wheels 46 and the rear wheels 47 based on operation of the steering wheel by the user.

[0532] The electronic control unit 49 consists of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63). Signals from various sensors 50-58 present in the vehicle are input to the electronic control unit 49. The electronic control unit 49 can also be referred to as an electronic control unit (ECU).

[0533] The signals from various sensors 50-58 include the following: current signal from current sensor 50 sensing the current of the motor; rotational speed signal of front wheel 46 / rear wheel 47 obtained by speed sensor 51; air pressure signal of front wheel 46 / rear wheel 47 obtained by air pressure sensor 52; vehicle speed signal obtained by vehicle speed sensor 53; acceleration signal obtained by acceleration sensor 54; accelerator pedal 43 depress amount signal obtained by accelerator pedal sensor 55; brake pedal 44 depress amount signal obtained by brake pedal sensor 56; shift lever 45 operation signal obtained by shift lever sensor 57; and detection signal obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0534] The information service unit 59 consists of various devices such as a navigation system, audio system, speakers, display, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0535] The information service unit 59 may include input devices (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) that accept input from the outside, and output devices (e.g., display, speaker, LED light, touch panel, etc.) that implement output to the outside.

[0536] The driver assistance system unit 64 comprises various devices used to provide functions for preventing accidents or reducing the driver's workload, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning detectors (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyroscope systems (e.g., Inertial Measurement Unit (IMU)) and Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, and one or more ECUs that control these devices. Furthermore, the driver assistance system unit 64 sends and receives various information via the communication module 60 to realize driver assistance functions or autonomous driving functions.

[0537] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) with the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49 of the vehicle 40, and various sensors 50-58 via the communication port 63.

[0538] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 60 can be located both inside and outside the electronic control unit 49. The external device can be, for example, the aforementioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 can be, for example, at least one of the aforementioned base station 10 and user terminal 20 (or it can function as at least one of the base station 10 and user terminal 20).

[0539] The communication module 60 can also wirelessly transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58 described above, the information obtained based on these signals, and the information based on input from an external (user) source obtained via the information service unit 59 to an external device. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., can also be referred to as input units that receive input. For example, the PUSCH transmitted via the communication module 60 can also contain information based on the aforementioned inputs.

[0540] The communication module 60 receives various information (traffic information, signal information, workshop information, etc.) sent from external devices and displays it on the vehicle's information service unit 59. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH received by the communication module 60 (or the data / information decoded from the PDSCH).

[0541] Furthermore, the communication module 60 stores various types of information received from external devices into a memory 62 that can be utilized by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, and various sensors 50-58, etc., of the vehicle 40.

[0542] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be rewritten as terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be rewritten as sidelink channel.

[0543] Similarly, the user terminal in this disclosure can also be rewritten as a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0544] In this disclosure, operations are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. In a network containing one or more network nodes having a base station, the various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0545] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, for the method described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0546] The various methods / implementations described in this disclosure can also be applied to 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, where x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Futuregeneration radio access (FX), Global System for Mobile Communications (GSM, a registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), and IEEE This includes 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wideband (UWB)), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from, modified, generated, or specified based on these methods. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0547] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0548] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0549] The term "determining" as used in this disclosure can encompass a wide variety of operations. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (search, inquiry) (e.g., searching in a table, database or other data structure), and ascertaining.

[0550] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0551] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". That is, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made. In this disclosure, "judgment (decision)" can also be rewritten in relation to the operations described above.

[0552] Furthermore, in this disclosure, "determine / determining" can also be interchanged with "assume / assuming," "expect / expecting," "consider / considering," etc. Additionally, in this disclosure, "not assuming to proceed..." can also be interchanged with "assuming not to proceed..."

[0553] In this disclosure, "expect" can also be interchanged with "be expected." For example, "expect(s) ..." ("..." can also be expressed using a "that" clause, an indefinite "to", etc.) can be interchanged with "be expected ...." "Does not expect..." can also be interchanged with "be not expected...". Furthermore, "An apparatus A is not expected..." can also be interchanged with "Apparatus B other than apparatus A does not expect..." (for example, if apparatus A is a UE, apparatus B can also be a base station).

[0554] The term "maximum transmit power" as used in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0555] As used in this disclosure, the terms “connected,” “coupled,” or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually “connected” or “coupled” elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, “connection” can also be rewritten as “access.”

[0556] In this disclosure, when two elements are connected, it is possible to consider using more than one wire, cable, printed electrical connection, etc. to be "connected" or "combined" with each other, and as several non-limiting and non-exclusive examples, to use electromagnetic energy with wavelengths having wireless frequency domain, microwave region, light (both visible and invisible) region to be "connected" or "combined" with each other.

[0557] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0558] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0559] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0560] In this disclosure, terms such as "below," "less than," "above," "more than," and "equal to" can be interchanged. Furthermore, in this disclosure, terms meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" are not limited to the positive, comparative, and superlative degrees and can be interchanged. Additionally, in this disclosure, terms meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" as expressions containing "i" (where i is any integer) can also be interchanged, not limited to the positive, comparative, and superlative degrees (for example, "highest" can be interchanged with "i-th highest").

[0561] In this disclosure, "of", "for", "regarding", "related to", "associated with" can also be rewritten interchangeably.

[0562] In this disclosure, phrases 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" can be rewritten interchangeably. Furthermore, A and B can be replaced with nouns, gerunds, or ordinary sentences, depending on the context. Additionally, the time difference between A and B can be approximately 0 (immediately after or immediately before). Moreover, a time offset can be applied to the time A occurs. For example, "A" can be rewritten interchangeably with "before / after the time offset of A". This time offset (e.g., more than one symbol / slot) can be predetermined or determined by the UE based on the information it is notified of.

[0563] In this disclosure, timing, moment, time, time instance, arbitrary time unit (e.g., time slot, sub-time slot, symbol, subframe), period, opportunity, resource, etc., can also be overridden.

[0564] The inventions disclosed herein have been described in detail above. However, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The description herein is for illustrative purposes only and is not intended to limit the inventions disclosed herein in any way.

[0565] This application is based on Japan Patent Application No. 2023-135507, filed on August 23, 2023. Its entire contents are contained herein.

Claims

1. A terminal, comprising: The receiving unit receives information relating to the setting of at least one Channel State Information Reference Signal (CSI-RS) resource for channel measurement used in coherent joint transmission (CJT); and The control unit, in receiving the downlink shared channel PDSCH corresponding to the CJT, determines the quasi-co-addressability of the PDSCH and the CSI-RS resources based on at least one of the number of transmission setting indicators (TCIs) for the PDSCH, the number of CSI-RS resources, and the number of TCI states corresponding to the CSI-RS.

2. The terminal as described in claim 1, wherein, The receiving unit receives information related to the TCI status. The control unit applies the indicated TCI state to at least one of the periodic CSI-RS and the semi-persistent CSI-RS.

3. The terminal as described in claim 1, wherein, The control unit applies at least one of the set TCI states corresponding to the at least one CSI-RS and at least one of the indication TCI states to the PDSCH.

4. The terminal as described in claim 1, wherein, The indication TCI state applied to the PDSCH is the same as the setting TCI corresponding to the CSI-RS.

5. A wireless communication method for a terminal, comprising: The steps of receiving information relating to the setting of at least one Channel State Information Reference Signal (CSI-RS) resource for channel measurement used in coherent joint transmission (CJT); and In the reception of the downlink shared channel PDSCH corresponding to CJT, the step of determining the quasi-co-addressability of the PDSCH and the CSI-RS resources is based on at least one of the number of transmission setting indicators (TCIs) for the PDSCH, the number of CSI-RS resources, and the number of TCI states corresponding to the CSI-RS.

6. A base station, comprising: The transmitting unit transmits information relating to the setting of at least one Channel State Information Reference Signal (CSI-RS) resource for channel measurement used in Coherent Joint Transmission (CJT); and The control unit, during the transmission of the downlink shared channel PDSCH corresponding to the CJT, controls the quasi-co-addressing of the PDSCH and the CSI-RS resources based on at least one of the number of transmission setting indicators (TCIs) for the PDSCH, the number of CSI-RS resources, and the number of TCI states corresponding to the CSI-RS.

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