Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a reception unit that receives one or more commands indicating a plurality of transmission configuration indicator (TCI) states and receives one downlink control information indicating two or more TCI states among the plurality of TCI states, and a control unit that controls reception or transmission using the two or more TCI states, the plurality of TCI states being associated with a plurality of cell identifiers.

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 further increasing data rates and reducing latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The study also explored subsequent systems to LTE (e.g., also known as the 5th generation mobile communication system (5G), 5G+, 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, 6G, etc.), research is underway on cell-free communication, where terminals (user terminals, user equipment (UE)) communicate using units different from existing cells.

[0009] However, specific research related to cellless communication is insufficient. Given this inadequacy, there are concerns that improvements in communication quality / throughput may be suppressed.

[0010] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station that utilizes units different from existing cells for appropriate communication.

[0011] Methods for solving problems

[0012] One aspect of the present disclosure relates to a terminal comprising: a receiving unit that receives one or more commands representing multiple transmission configuration indicator (TCI) states and receives downlink control information indicating two or more of the multiple TCI states; and a control unit that controls the reception or transmission using the two or more TCI states, wherein the multiple TCI states are associated with multiple cell identifiers.

[0013] Invention Effects

[0014] According to one method of this disclosure, appropriate communication is carried out using units that are different from those in existing communities. Attached Figure Description

[0015] Figure 1A as well as Figure 1B This is a diagram that provides an overview of MIMO.

[0016] Figure 2A as well as Figure 2B This is a diagram that shows the outline of cellular systems and cellless systems.

[0017] Figures 3A-3C This is a diagram illustrating an example of the various conceptual designs for a cellless structure.

[0018] Figure 4 This represents an example of a list of TCI states related to Option 1 of Implementation Method 1.

[0019] Figure 5 This represents an example of a list of TCI states related to option 2-1 of implementation method 1.

[0020] Figure 6This is an example of a list of TCI states related to option 2-2 of implementation method 1.

[0021] Figure 7 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 1 of Implementation 2.

[0022] Figure 8 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 2 of Implementation 2.

[0023] Figure 9 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 3 of Implementation 2.

[0024] Figure 10 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 4 of Implementation 2.

[0025] Figure 11 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 1 of Implementation 3.

[0026] Figure 12 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 2 of Implementation 3.

[0027] Figure 13 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 3 of Implementation 3.

[0028] Figure 14 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in option 4 of implementation method 3.

[0029] Figure 15 This illustrates an example of updating the activated TCI state in Implementation 4.

[0030] Figure 16 This represents another example of updating the activated TCI state in Implementation 4.

[0031] Figures 17A-17C This represents an example of an indication of the TCI status sent in Implementation 4.

[0032] Figure 18 This represents an example of the mapping between the activated TCI state and the code points of the TCI field involved in Option 1 of Implementation 5.

[0033] Figure 19 This represents an example of updating a subset of the activated TCI states involved in Option 1 of Implementation 6.

[0034] Figure 20 This represents an example of updating a subset of the activated TCI states involved in Option 2 of Implementation 6.

[0035] Figure 21 This represents an example of updating a subset of the activated TCI states involved in option 3 of implementation 6.

[0036] Figure 22 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0037] Figure 23 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0038] Figure 24 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0039] Figure 25 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment.

[0040] Figure 26 This is a diagram illustrating an example of a vehicle according to one embodiment. Detailed Implementation

[0041] (TCI, Spatial Relations, QCL)

[0042] In NR, research is underway to control 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 based on the Transmission Configuration Indication state (TCI state).

[0043] TCI states can also represent the TCI states of signals / channels applied to the downlink. The equivalent TCI states of signals / channels applied to the uplink can also be described as spatial relations.

[0044] The TCI status refers to information related to the quasi-co-location (QCL) of a signal / channel, and can also be called spatial reception parameters, spatial relation information, etc. The TCI status can also be set for the UE on a per-channel or per-signal basis.

[0045] QCL is an indicator of 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 at least one parameter of Doppler shift, Doppler spread, average delay, delay spread, or spatial parameter (e.g., spatial Rx parameter) is the same across these different signals / channels (at least one of these is a QCL).

[0046] 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).

[0047] Regarding QCL, multiple types (QCL types) can also be specified. For example, four different QCL types (AD) can be set up that can be assumed to have the same parameters (or parameter sets).

[0048] The UE envisions a relationship between a certain Control Resource Set (CORESET), a 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 called a QCL assumption.

[0049] 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.

[0050] TCI status can also be, for example, information related to the QCL between the target channel (in other words, the channel using a reference signal (RS)) 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.

[0051] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0052] 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))).

[0053] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: Synchronization Signal Block (SSB), Channel State Information Reference Signal (CSI-RS), Measurement Reference Signal (Sounding Reference Signal (SRS)), Tracking CSI-RS (also known as Tracking Reference Signal (TRS)), and QCL Detection Reference Signal (also known as QRS).

[0054] An SSB is a block of signals that contains at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0055] The RS of QCL type X in TCI state can also refer to the RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0056] In this disclosure, the port (antenna port) of a signal (resource, channel) and RS (DL RS, QCL source RS) are QCLed, there is a QCL relationship between the port of a signal and RS, the signal and RS are QCLed, the signal and RS in the TCI state are QCLed, the signal and RS in the TCI state are QCLed with respect to a specific QCL type, the signal and TCI state are associated, the TCI state is set / indicated for the signal, and the UE assumes that the port of the signal and RS in the TCI state are QCLed and can also be mutually rewritten.

[0057] 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.

[0058] (Unified / Common TCI Framework)

[0059] According to the unified TCI framework, multiple (UL / DL) channels / RS can be controlled through a common framework. Unlike Rel.15, which specifies TCI states or spatial relationships for each channel, the unified TCI framework can both indicate a common beam (common TCI state) and apply it to all channels of UL and DL, or apply the common beam used by UL to all channels of UL and the common beam used by DL to all channels of DL.

[0060] We are researching a single common beam for both DL and UL, or a common beam for DL ​​and a common beam for UL (totaling two common beams).

[0061] 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).

[0062] Default beam alignment for UL and DL 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).

[0063] 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 of the X activated TCI states. The selected TCI state can also be applied to the channels / RS of both UL and DL.

[0064] 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.

[0065] 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 (N ≥ 1) and the number of TCI states (DL TCI states) applied in the DL channel / RS (M ≥ 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.

[0066] In this disclosure, when N=M=X (X is any integer), it can 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 can also mean: notifying / setting / indicating X UL TCI states (corresponding to X TRPs) and Y DLTCI states (corresponding to Y TRPs) (i.e., independent TCI states) to the UE separately.

[0067] For example, when recorded as N=M=1, it can also mean: a TCI state (joint TCI state for a single TRP) that is common to both UL and DL for a single TRP, which is notified / set / instructed to the UE.

[0068] In addition, for example, when N=1 and M=1 are recorded, it can also mean: separately notifying / setting / instructing the UE of a UL TCI state and a DL TCI state (an independent TCI state for a single TRP).

[0069] In addition, for example, when N=M=2 is recorded, it can also mean: notifying / setting / instructing the UE of multiple (2) TCI states common to UL and DL for multiple (2) TRPs (joint TCI states for multiple TRPs).

[0070] In addition, for example, when N=2 and M=2 are recorded, it can also mean: to notify / set / instruct the UE for multiple (2) TRPs, multiple (2) UL TCI states and multiple (2) DL TCI states (independent TCI states for multiple TRPs).

[0071] Furthermore, in the above example, the cases where the values ​​of N and M are 1 or 2 were explained, but the values ​​of N and M can also be 3 or higher, and N and M can also be different.

[0072] Currently under investigation, support for N=M=1 in Rel.17 is being explored. For example, it could also support indicating a single common beam (e.g., a common beam) via RRC / MAC CE / DCI, where this single common beam is applied to multiple DL / UL channels / reference signals. Furthermore, other scenarios could be supported in Rel.18 and later.

[0073] 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.

[0074] A DCI can be either 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 single DCI can also indicate both the UL TCI and the DL TCI.

[0075] The indicated TCI status ID can be either one TCI status applied to both UL and DL, or two TCI statuses applied to UL and DL respectively.

[0076] Multiple TCI states set via RRC parameters, and at least one of multiple TCI states activated via MAC CE, can also be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). Multiple TCI states activated via MAC CE can also be referred to as an activated TCI pool (activated common TCI pool).

[0077] 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, when one of multiple TCI states is indicated using a DCI, it can be either receiving indication information contained in the DCI indicating one of the multiple TCI states, or simply receiving "indication information".

[0078] In separate TCI states (e.g., separate TCI states (DL TCI state and UL TCI state)), the RRC parameter sets multiple TCI states (joint common TCI pools) used by both DL and UL. The MAC CE can also activate multiple TCI states (activate TCI pools) within the set multiple TCI states. Separate activation TCI pools can also be set / activated for each of UL and DL.

[0079] The DL DCI or new DCI format can also select (indicate) more than one (e.g., one) TCI states. The selected TCI state can also be applied to more than one (or all) DL channels / RS. DL channels 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 states. The selected TCI state can also be applied to more than one (or all) UL channels / RS. UL channels can also be PUSCH / SRS / PUCCH. In this way, different DCIs can also separately indicate the UL TCI and DL DCI.

[0080] Following Rel.17 NR, it is envisioned that support will be provided for the activation / indication of beams with TCI states associated with different physical cell identifiers (PCIs) via MAC CE / DCI. Furthermore, following Rel.18 NR, it is envisioned that support will be provided for indicating changes of serving cells to cells with different PCIs via MAC CE / DCI.

[0081] The joint TCI state and the standalone (DL / UL) TCI state can also be switched. Which TCI state to apply, the joint TCI state or the standalone TCI state, can be set by the base station to the UE through higher-layer parameters, or it can be switched through the TCI field (TCI state ID) in the DCI.

[0082] The unified TCI framework supports the following modes 1 to 3.

[0083] [Mode 1] TCI state indication based on MAC CE

[0084] [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)

[0085] [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)

[0086] In addition, the DCI in Mode 2 / Mode 3 mentioned above can also be called beam indication DCI.

[0087] In this disclosure, the TCI state indicated by DCI, the indicated TCI state, the unified TCI state, the TCI state applied to multiple 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 set single unified TCI state, and the activated single unified TCI state can also be overwritten with each other.

[0088] 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.

[0089] The unified / public TCI status can also refer to the TCI status indicated by the (Rel.17) DCI / MAC CE / RRC.

[0090] The indicated TCI state can also be shared with the UE-specific receive, dynamic authorization (DCI) / configured authorization PUSCH in the PDSCH / PDCCH (updated using Rel.17 DCI / MAC CE / RRC), and at least one of 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.

[0091] In cases where the TCI state is indicated (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 TCI state).

[0092] The TCI state setting may also not be shared with the UE-specific receive, dynamically authorized (DCI) / configured authorized PUSCH, and at least one of multiple (e.g., all) dedicated PUCCH resources in the PDSCH / PDCCH (updated using Rel.17 DCI / MAC CE / RRC). The TCI state setting may also be structured as follows: set per CORESET / per resource / per resource set via RRC / MAC CE, and the TCI state setting will not be updated even if the aforementioned indicated TCI state is updated.

[0093] We are investigating applying indication TCI status to UE-specific channels / signals (RS). Additionally, we are investigating using higher-layer signaling (RRC signaling) to notify the UE of applying indication TCI status and specifying which TCI status to set for non-UE-specific channels / signals.

[0094] 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 set / indicate the TCI state using RRC / MAC CE, on a per CORESET / per resource / per resource set basis. Furthermore, an investigation is underway to allow the UE to make a judgment based on specific parameters regarding this setting / indication.

[0095] 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, updating the setting TCI state may not be necessary. Furthermore, research is underway to allow the UE to make decisions based on specific parameters for this update.

[0096] In addition, research is underway on using higher-layer signaling (RRC / MAC CE) to switch whether to apply the indicator TCI state or not for PDCCH / PDSCH (apply setting TCI state or apply TCI state that is set separately from the indicator TCI state).

[0097] 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 non-UE-specific CORESET and PDSCH associated with that CORESET.

[0098] In addition, for inter-cell beam indication (e.g., L1 / L2 inter-cell mobility), research is underway to support indicating TCI status for UE-specific CORESET and PDSCH associated with that CORESET.

[0099] In Rel.15, whether a TCI state is indicated for CORESET#0 depends on the base station implementation. In Rel.15, for a CORESET#0 that is indicated with a TCI state, that indicated TCI state is applied. For a CORESET#0 that is not indicated with a TCI state, the SSB selected at the time of the most recent (most recent) PRACH transmission is in the QCL.

[0100] In the unified TCI state framework after Rel.17, the TCI state related to CORESET#0 is being studied.

[0101] For example, within the framework of the unified TCI state after Rel.17, the TCI state indication of 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 (the Rel-17 TCI state associated with the serving cell). If not applied, the existing MAC CE / RACH signaling mechanism can be utilized.

[0102] Additionally, in Rel.17, the CSI-RS associated with the TCI state applied to CORESET#0 can also be QCLed with the SSB associated with the serving cell PCI (physical cell ID) (same as Rel.15).

[0103] Alternatively, for CORESET#0, CORESETs with a common search space (CSS), and CORESETs with both CSS and UE-specific search space (USS), the RRC parameter can be used to set whether to follow the indicated TCI state for each CORESET. Even if the indicated TCI state is not set for a particular CORESET, setting the TCI state can still be applied to that CORESET.

[0104] Alternatively, for non-UE-dedicated channels / RS (other than CORESET), the compliance with the indicated TCI state can be set via RRC parameters for each channel / resource / resource set. Even if the compliance with the indicated TCI state is not set for that channel / resource / resource set, setting the TCI state can still be applied to that channel / resource / resource set.

[0105] [Antenna Port QCL: Data Physical Layer Procedure / Physical Downlink Shared Channel Association Procedure / UE Procedure for Reception of Physical Uplink Shared Channel]

[0106] To perform PDSCH decoding in accordance with the detected PDCCH accompanied by the DCI for the UE and the given serving cell, the UE can be configured with a list of up to M TCI-States within 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 given by the higher-layer parameter qcl-Type within QCL-Info, which can take one of the following values:

[0107] ◇'typeA': {Doppler offset, Doppler spread, average delay, delay spread}

[0108] ◇'typeB': {Doppler offset, Doppler extension}

[0109] ◇'typeC': {Doppler offset, average delay}

[0110] ◇'typeD': {Spatial Rx parameter}

[0111] To provide reference signals for the DMRS and PDCCH of the PDSCH and the CSI-RS within a certain CC, further, if a UL TX (transmit) spatial filter can be used, wherein the UL TX (transmit) spatial filter is used for the PUSCH and PUCCH resources and SRS based on dynamic permission and setting permission within a certain CC, in order to provide a reference for the decision of the UL TCI filter, the UE can be configured with a list of up to 128 DLorJointTCIState (DL or joint TCI state) settings in the PDSCH-Config.

[0112] If no TCI state (DL or joint TCI state (TCI-State), or ULTCI state (TCI-UL 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 has dl-OrJointTCI-StateList or TCI-UL-State set in any CC within the same band, it is not expected to have any of the following set 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) set in that band. When 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 the UE is not configured with a DL-OrJointTCI-StateList or TCI-UL-State in any CC within the same band domain of the CC list.

[0113] The UE receives an activation command, which is used to map up to eight TCI states and / or up to eight TCI state pairs (with one TCI state for the DL channel / signal and / or one TCI state for the UL channel / signal) to one or more CCs / DL BWPs, and, if applicable, to one or more DCI field 'Transmission Configuration Indication' code points for CCs / UL BWPs, up to eight TCI states and / or up to eight TCI state pairs (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).

[0114] 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 DL and / or UL BWPs within the indicated CC.

[0115] If the activation command maps a TCI state (at least one of TCI-State and TCI-UL-State) to only one code point, and the mapping indicated for that single TCI code point is applied as described in the requirements for support for Radio Resource Management (RRM) (MAC CE-based DL TCI state handover delay / MAC CE-based UL TCI state handover delay), then 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.

[0116] 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 assumes that the QCL type A / D source RS is set in the CC / DL BWP of the applied TCI state.

[0117] For CORESET, when a DCI field is set in the DCI (tci-PresentInDCI or tci-PresentDCI-1-2 set to 'enabled'), the UE receives DCI format 1_1 / 1_2 with an active TCI state (TCI-State or TCI-UL-State), DL or JointTCI-StateList, which provides an indication of the TCI state (at least one of TCI-State and TCI-UL-State) for one CC, or for all CCs in the same CC list set by the simultaneous unified TCI update lists (simultaneousU-TCI-UpdateList1-r17, simultaneousU-TCI-UpdateList2-r17, simultaneousU-TCI-UpdateList3-r17, simultaneousU-TCI-UpdateList4-r17). If a DL allocation is available, the DCI format 1_1 / 1_2 may or may not be accompanied by such a DL allocation.

[0118] If the UE is not accompanied by DL allocation in DCI format 1_1 / 1_2, the following can be envisioned (verified).

[0119] ◇CS-RNTI is used for scrambling the CRC of this DCI.

[0120] ◇The following DCI field (special field) values ​​are set as follows:

[0121] -◇The redundant version (RV) field is all '1's.

[0122] -◇The modulation and coding scheme (MCS) field is all '1's.

[0123] -◇The new data indicator (NDI) field is 0.

[0124] -◇The frequency domain resource assignment (FDRA) field is all '0's for FDRA type 0, 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).

[0125] If the UE receives a higher-level setting of dl-OrJointTCI-StateList which can be used as an indication of TCI state and is accompanied by a single TCI-State, the UE obtains the QCL assumption from the set TCI state for the DM-RS of PDSCH and DM-RS of PDCCH that apply the indication of TCI state.

[0126] If the UE receives a higher-level setting of a dl-OrJointTCI-StateList that can be used as an indication of TCI state, accompanied by a single TCI-State or a single TCI-UL-State, the UE determines the UL TX spatial filter from the set TCI state, if applicable, for the PUSCH, PUCCH, and SRS that indicate the TCI state based on dynamic permission and setting permission.

[0127] If a UE in the list of DL-OrJointTCI-States is configured to transmit a PUCCH with a positive HARQ-ACK corresponding to a DCI that transmits a TCI state indication without DL allocation, or a PUSCH with a positive HARQ-ACK corresponding to a PDSCH that is scheduled by transmitting a DCI that transmits a TCI state indication, and if 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) is applied starting 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 the number of symbols in beamAppTime are both determined in the active BWP with minimum SCS within the BWP, which comes from the CC applied at the end of the transmission of the affirmative HARQ-ACK, the PUCCH or the PUSCH indicating the TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State).

[0128] [DCI Format 1_1: Multiplexing and Channel Coding / Downlink Transmission Channel and Control Information / Downlink Control Information / DCI Format]

[0129] 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 approach is being investigated regarding the relationship between Rel.17 TCI state support and the interpretation of the TCI field. It is being investigated whether the TCI field is always present in DCI format 1_1 / 1_2 if the UE is set with Rel.17 TCI state, and whether the UE ignores the TCI field if the UE does not support TCI updates via DCI.

[0130] In Rel.15 / 16, the presence of the TCI field (TCI presence information within DCI, tci-PresentInDCI) is set per CORESET.

[0131] In DCI format 1_1, the TCI field is 0 bits if the higher-layer parameter tci-PresentInDCI is not set to valid, and 3 bits otherwise. When the BWP indicator field indicates that a BWP other than the active BWP is activated, the UE follows these steps.

[0132] [Operation] If the higher-layer parameter tci-PresentInDCI is not set to valid for the CORESET used to transmit the DCI format 1_1, the UE assumes that tci-PresentInDCI is not set to valid for all CORESETs within the indicated BWP; otherwise, the UE assumes that tci-PresentInDCI is set to valid for all CORESETs within the indicated BWP.

[0133] 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. If the BWP indicator field indicates that a BWP other than BWP is activated, the UE follows the procedure below.

[0134] [Operation] If the higher-layer parameter tci-PresentInDCI-1-2 is not set for the CORESET used to transmit the DCI format 1_2, the UE assumes that tci-PresentInDCI is not set to 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 DCI format 1_2.

[0135] 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.

[0136] 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.

[0137] [Channel / RS with TCI status indicated by the application]

[0138] The "indicated TCI state" based on MAC CE / DCI can also be applied to the following channels / RS.

[0139] [PDCCH]

[0140] • If `followUnifiedTCIState` is set for CORESET0, the indicated TCI state is applied. Otherwise, for that CORESET, the Rel.15 specification is applied. That is, CORESET0 follows the TCI state activated via MACCE, or is QCL-enabled with SSB.

[0141] • For CORESETs with USS / CSS type 3 and index other than 0, always apply the TCI indicator status.

[0142] • For a CORESET other than index 0 that has at least CSS of type 3 or higher and is configured to conform to a uniform TCI state, the indicator TCI state is applied. Otherwise, the configured TCI state is applied to that CORESET.

[0143] [PDSCH]

[0144] • Always apply the indicator TCI status to the UE-dedicated PDSCH.

[0145] • 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 to schedule the PDSCH.

[0146] [CSI-RS]

[0147] • When a CORESET for an A-CSI-RS used for CSI acquisition or beam management is set to followUnifiedTCIState (for the PDCCH that triggers the A-CSI-RS), the TCI state is indicated. For other CSI-RSs, the configured TCI state for that CSI-RS is applied.

[0148] [PUCCH]

[0149] • Always apply the indicator TCI status for all dedicated PUCCH resources.

[0150] [PUSCH]

[0151] • For dynamic / configured license PUSCH, always apply an indication of TCI status.

[0152] [SRS]

[0153] • 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 that SRS resource set is applied.

[0154] 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.

[0155] (Multiple TRPs)

[0156] In NR, research is underway on one or more Transmission / Reception Points (TRPs) (multiple TRPs) using one or more panels (multiple panels) to perform DL transmissions to the UE. Additionally, research is underway on the UE performing UL transmissions to one or more TRPs.

[0157] Furthermore, multiple TRPs can correspond to the same cell identifier (cell Identifier(ID)), different cell IDs, different TCI state positions / orders, different CORESET pools, or different SRS resource sets. The cell ID can be a physical cell ID (e.g., PCI) or a virtual cell ID.

[0158] In the case where only one TRP (TRP1) transmits data to the UE in a multi-TRP configuration (also known as single-mode, single TRP, etc.), TRP1 sends both control signals (PDCCH) and data signals (PDSCH) to the UE.

[0159] In this disclosure, single TRP mode can also refer to the mode in which no multi-TRP (mode) is set.

[0160] In the case where only one TRP in a multi-TRP sends control signals to the UE and that multi-TRP sends data signals (also known as single-master mode), the UE receives each PDSCH sent from the multi-TRP based on one downlink control information (Downlink Control Information (DCI)).

[0161] In a scenario where each of the multiple TRPs sends a different control signal to the UE, and the multiple TRPs also send data signals (also known as multi-master mode), a first control signal (DCI) can be sent in TRP1, and a second control signal (DCI) can be sent in TRP2. Based on these DCIs, the UE receives each PDSCH sent from the multiple TRPs.

[0162] When using a single DCI to schedule multiple PDSCHs from multiple TRPs (also known as multiple PDSCHs), this DCI can also be called a single DCI (S-DCI, single PDCCH). Furthermore, when using multiple DCIs to schedule multiple PDSCHs from multiple TRPs separately, these multiple DCIs can also be called multiple DCIs (M-DCI, multiple PDCCHs).

[0163] Different Transport Blocks (TBs) / Code Words (CWs) / different layers can also be sent from each TRP of a multi-TRP system. Alternatively, the same TB / CW / layer can be sent from each TRP of a multi-TRP system.

[0164] As a method of multi-TRP transmission, non-coherent joint transmission (NCJT) is being investigated. In NCJT, for example, TRP1 modulates and maps a first codeword, and transmits a first PDSCH using a first precoding in a first number of layers (e.g., 2 layers). Furthermore, TRP2 modulates and maps a second codeword, and transmits a second PDSCH using a second precoding in a second number of layers (e.g., 2 layers).

[0165] Alternatively, it can be defined as the partial or complete repetition of multiple PDSCHs (multiple PDSCHs) of the NCJT with respect to at least one of the time domain and the frequency domain. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP can also be repeated with respect to at least one of the time resources and the frequency resources.

[0166] It can also be envisioned that these first PDSCHs and second PDSCHs are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be rewritten as the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0167] In URLLC for multiple TRPs, research is underway to support repetition of PDSCH (Transport Block (TB) or Codeword (CW)) across multiple TRPs. Research is also underway to support repetition methods across multiple TRPs in the frequency domain, layer (spatial) domain, or time domain (URLLC schemes, e.g., schemes 1, 2a, 2b, 3, 4). In scheme 1, multiple PDSCHs from multiple TRPs are space-division multiplexed (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency-division multiplexed (FDM). In scheme 2a, for multiple TRPs, the redundancy version (RV) is the same. In scheme 2b, for multiple TRPs, the RV can be the same or different. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time-division multiplexed (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted within one timeslot. In scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different time slots.

[0168] Based on this multi-TRP scenario, more flexible transmission control is possible when using high-quality channels.

[0169] NCJT using multiple TRPs / panels may employ high rank. To support both ideal and non-ideal backhaul between multiple TRPs, both single DCI (single PDCCH) and multiple DCI (multiple PDCCH) can be supported. For both single and multiple DCI, the maximum number of TRPs can be two.

[0170] For single PDCCH designs (primarily for ideal backhaul), TCI extensions are being investigated. Each TCI code point within the DCI can also correspond to one or two TCI states. The TCI field size can also be the same as Rel.15.

[0171] For PDCCH / CORESET as specified in Rel.15, one TCI state without a CORESET pool index (also known as TRP information (TRP Info)) is assigned to one CORESET.

[0172] For the enhancements to PDCCH / CORESET specified in Rel.16, in multi-TRP based on multi-DCI, a CORESET pool index is set for each CORESET.

[0173] (JT)

[0174] Joint transmission (JT) can also refer to the simultaneous transmission of data from multiple points (e.g., TRPs) to a single UE.

[0175] Rel.17 supports non-coherent joint transmission (NCJT) from two TRPs. PDSCH from the two TRPs can also be precoded and decoded independently. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In the case of overlap, PDSCH from one TRP becomes interference to PDSCH from the other TRPs.

[0176] In Rel.18, research is underway to support coherent joint transmission (CJT, mTRP CJT) using up to four TRPs. 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. 4TRP joint precoding can also be used to improve signal quality, with no interference between the four TRPs. Data can also be subject to interference only from sources outside the four TRPs.

[0177] (TCI indication in Rel.18 NR)

[0178] The TCI status setting based on RRC follows these guidelines.

[0179] ◇For a single serving cell, up to 128 TCI states can be configured. In coordination among multiple TRPs with different PCIs, multiple TCI states can be associated with the SSBs of different PCIs, and up to 8 PCIs can be configured.

[0180] The activation of the TCI state based on MAC CE follows the following.

[0181] ◇In a single TRP transmission, up to 8 TCI states can be activated for one serving cell, or for one BWP of one serving cell. During handover between multiple TRPs with different PCIs, multiple activated TCI states can be associated with the SSBs of different PCIs, activating up to 8 PCI TCI states.

[0182] ◇In multi-TRP joint transmission, up to 8 TCI states can be activated for each TRP / cell, and up to 16 TCI states can be activated overall. In joint transmission using multiple TRPs with different PCIs, multiple activated TCI states can be associated with the SSBs of different PCIs, and up to 2 PCI TCI states can be activated.

[0183] The indication of TCI status based on DCI follows.

[0184] ◇ Multiple code points in the TCI indicator field within the DCI are mapped to multiple TCI states activated via MAC CE.

[0185] ◇In a single TRP transmission, one code point in the TCI indicator field within the DCI is mapped to a combined TCI of DL and UL, or a DL TCI and a UL TCI, or a DL TCI, or a UL TCI.

[0186] ◇In multi-TRP joint transmission based on a single DCI, one code point of the TCI indicator field in the DCI is mapped to one or two DL and UL joint TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs.

[0187] ◇In multi-TRP joint transmission based on multiple DCIs, one code point in the TCI indicator field within a DCI is mapped to one or two DL and UL joint TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs. Multiple DCIs represent the TCI status for multiple TRPs.

[0188] (No residential area)

[0189] In existing wireless communication systems (e.g., 5G NR), a cellular approach is generally adopted, where one antenna / TRP forms one cell. The area formed by this cell is fixed / static.

[0190] Furthermore, in existing wireless communication systems (e.g., Rel. 16 and later), distributed multiple input multiple output (Distributed MIMO, e.g., multiple TRPs utilizing multiple transmit and receive points (TRPs)) has been introduced, where the communication area is formed by the coverage of multiple antennas / TRPs. Distributed MIMO enables simultaneous communication using multiple antennas / TRPs, as well as communication using only one antenna / TRP.

[0191] By adopting distributed MIMO, more suitable line-of-sight environments can be configured, enabling performance improvements related to MIMO.

[0192] Figure 1A as well as Figure 1B This is a diagram illustrating the general structure of MIMO. Figure 1A The image shows an example of co-located MIMO. In co-located MIMO, one UE communicates with one antenna / TRP.

[0193] On the other hand, Figure 1BThe text describes an example of distributed MIMO. In distributed MIMO, one UE communicates with multiple cooperating antennas / TRPs.

[0194] In future wireless communication systems (e.g., Rel.20 and beyond), the introduction of cellless communication is being studied with the aim of further improving performance and reducing energy consumption. This further performance improvement is achieved by reducing interference between multiple antennas / TRPs, equipping line-of-sight environments that correspond to the use of high frequencies, improving the overall frequency utilization efficiency of the system, and providing equal and high-quality communication for all user applications.

[0195] Cellular-free MIMO can also be referred to as cellless massive MIMO (mMIMO) or large-scale distributed MIMO (D-MIMO). Cellular-free MIMO utilizes coherent coordination across a large number of access points. Cellular-free MIMO can also incorporate at least one of the following: ultra-dense deployment, scalable cooperation, user-centric clustering, supercarrier aggregation, and analog fronthaul. The user plane for cellless MIMO can also offer more flexible scheduling than existing methods. To facilitate signaling, the control plane for cellless MIMO can maintain several cell-like configurations.

[0196] In cellless environments, unlike traditional cellular systems, a single area (also known as a cell / sub-cell, etc.) can be formed across multiple antennas / TRPs. That is, this area can also refer to a cell whose location is independent of the antennas.

[0197] In a cell-free environment, the set of antennas / TRPs used for area formation can be changed according to the needs of the UEs. For example, the set of antennas / TRPs can also be changed based on the number of UEs / services / communication purposes (e.g., initial access / data communication / measurement / reporting, etc.) that are not within the coverage area of ​​the antenna / TRP.

[0198] In other words, in a cell-free environment, the coverage areas of multiple antennas / TRPs can also overlap.

[0199] In a cell-free environment, the direction of transmitting synchronization signals (e.g., also known as synchronization signal block (SSB), synchronization signal / physical broadcast channel (SS / PBCH) block, etc.) can also be controlled in each antenna / TRP.

[0200] Furthermore, in the absence of a cell, the centralized unit (CU) / distributed unit (DU) can be virtualized for each antenna / TRP. Alternatively, management can be performed only in the CU for each antenna / TRP.

[0201] Figure 2A This is a diagram showing an overview of a cellular system. Figure 2A The diagram shows the cell formed by each antenna / TRP, and the UE communicates based on this cell.

[0202] on the other hand, Figure 2B This is a diagram representing an overview of a cellless system. Figure 2B In the example shown, the antenna / TRP configuration does not form a fixed / static cell within the cellular system. For example... Figure 2B As shown, in a cell-free system, one or more antennas / TRPs form an area corresponding to the conditions. Therefore, in a cell-free system, each antenna / TRP may not correspond to the same physical cell ID, and the areas of multiple antennas / TRPs may overlap.

[0203] Cellular non-cell functionality can also be achieved by adjusting the set of antennas / TRPs controlled by a central control unit (e.g., CU).

[0204] In cellless systems, a first cell with a fixed physical range (e.g., also referred to as a cell / super cell / macro cell / large cell, etc.) and a second cell whose physical range varies semi-statically / dynamically based on conditions (e.g., also referred to as a sub-cell / region / micro-cell / cell / small cell / second cell within a first cell, etc.) can be formed, similar to a cell in a 5G NR system. For example, to distinguish it from the second cell, the first cell can also be called a super cell. When a super cell consists of multiple second cells, the second cells can also have the same definition / operation / coverage as existing cells in NR. For example, to distinguish it from the first cell, the second cell can also be called a sub-cell. When a super cell or a cell consists of multiple sub-cells, the sub-cells can also have the same definition / operation / coverage as existing cells in NR.

[0205] The first cell can be a newly defined cell in a future wireless communication system, or it can reuse the cell definition in an existing wireless communication system.

[0206] For the structures of the first and second communities, consider the following assumptions 1 and 2:

[0207] Scenario 1: The first cell consists of multiple TRPs, each with a single cell ID (Physical Cell ID (PCI)). These multiple TRPs can coordinate their transmission and reception.

[0208] Scenario 2: The first cell consists of multiple TRPs (or sub-cells) with different cell IDs. Multiple TRPs / sub-cells can coordinate to transmit and receive.

[0209] Figure 3A This is a diagram illustrating an example of a schematic representation of a cell-free structure (Concept 1). Figure 3A In the example shown, the TRPs contained in the first cell (supercell / cell) have the same PCI (PCI#0). Multiple TRPs can coordinate communication for a single UE.

[0210] Figure 3B This is a diagram illustrating an example of a schematic representation of concept 2 for a cell-free structure. Figure 3B In the example shown, the TRPs contained in the first cell (supercell / cell) have different PCIs (PCI#0 to #9). Multiple TRPs can coordinate communication for a single UE.

[0211] Figure 3C These are diagrams illustrating other examples of a schematic representation of the cell-free structure concept 2. In Figure 3A In the example shown, PCI is allocated to each TRP contained in the first cell (supercell / cell). Figure 3C In the example shown, with Figure 3B Unlike other examples, the same PCI can correspond to multiple TRPs. Multiple TRPs can coordinate communication for a single UE. Multiple TRPs associated with the same PCI can also be contained within a single cell.

[0212] Transmission / reception with TRP / subcell coordination can also be based on at least one of the following methods supported in NR.

[0213] ◇ Transmission of a single TRP / subcell accompanied by dynamic TRP / subcell handover (single TRP transmission).

[0214] ◇Joint transmission using multiple TRPs / subcells (multi-TRP joint transmission). This joint transmission can be based on a single DCI or multiple DCIs. This joint transmission can be either incoherent joint transmission (NCJT) or coherent joint transmission (CJT).

[0215] For cell-free operation, if we envision ideal backhaul and close coordination, then in joint transmission mode, CJT can be prioritized over NCJT, and joint transmission based on a single DCI can be prioritized over joint transmission based on multiple DCIs.

[0216] (argument)

[0217] Consider the following approaches in the extensions related to beam indication (TCI indication) in cellless environments.

[0218] ◇Method 1: Compared to NR, there are more TRPs / subcells within a supercell / cell.

[0219] ◇Method 2: Dynamic clustering of TRP / subcells for joint transmission / reception.

[0220] ◇Method 3: Compared to NR, more TRP / subcell coordinated transmission / reception is used.

[0221] It is believed that the 128 TCI states set by RRC are insufficient for the use of supercells / a large number of TRPs / subcells within a cell.

[0222] It is believed that in the transmission of a single TRP / subcell accompanied by dynamic TRP / subcell handover, the eight TCI states activated by MAC CE are insufficient to support a large number of coordinated TRP / subcells (dynamic handover between a large number of TRP / subcells).

[0223] It is believed that in joint transmission of multiple TRPs / subcells, the 16 TCI states activated by MAC CE are insufficient to support dynamic TRP / subcell clustering (dynamic selection of multiple TRPs / subcells for joint transmission).

[0224] It is believed that in the joint transmission of multiple TRPs / subcells, the 16 TCI states activated by MAC CE are insufficient to support the large number of TRPs / subcells used for joint transmission, and the code points of the TCI field in the DCI mapped to the two TCI states are insufficient.

[0225] As such, beam pointing in cases using units different from existing cells has not been adequately studied. If beam pointing is not sufficiently studied, there are concerns about a potential reduction in communication quality / throughput.

[0226] Therefore, the inventors of this invention conceived of a beam pointing method that utilizes units different from those in existing cells.

[0227] (Various rewrites, etc.)

[0228] 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.

[0229] 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".

[0230] 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.

[0231] 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.

[0232] In this disclosure, higher-layer signaling may be any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof. In this disclosure, RRC signaling, RRC IE, RRC parameters, and higher-layer parameters may also be rewritten.

[0233] 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).

[0234] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0235] In this disclosure, "having the ability to..." and "the ability to support / report on..." can be interchanged.

[0236] In this disclosure, ceil(x), the ceiling function, and the floor function can be rewritten interchangeably. In this disclosure, floor(x), the floor function, and the floor function can be rewritten interchangeably. In this disclosure, sqrt(x) and the square root can be rewritten interchangeably. In this disclosure, x mod y, mod(x, y), the mod function, and the modulo operation can be rewritten interchangeably. In this disclosure, Σ... i=M M+N-1 f(i), Σ i=M M+N-1 f i f(i) or f(i) throughout i = M, M+1, ..., M+N-1 i The summation, f(M) + f(M+1) + ... + f(M+N-1), f M +f M+1 +...+f M+N-1 They can also be rewritten interchangeably. C(n,k) is related to the number of combinations of choosing k values ​​from n values ​​(combinatorial coefficient) and binomial coefficients. n C k C n k They can also be rewritten from each other.

[0237] In this disclosure, a b The expressions a, b, and b assigned to the lower right of a can also be rewritten. In this disclosure, a c The expressions a, a^c, and c assigned to the upper right of a can also be rewritten. In this disclosure, a b c The expressions a_b^c, where b is assigned to the lower right of a and c to the upper right, can also be rewritten. In this disclosure, x ～ It can also be represented by assigning a tilde (~) to x, and can also be called an x-wavy line. In this disclosure, x -It can be represented by adding a hyphen (-) to x, or it can be called x-bar (bar).

[0238] In this disclosure, the frequency range corresponding to FR1 can also be 410-7125MHz. In this disclosure, FR2 can also include FR2-1 and FR2-2, the frequency range corresponding to FR2-1 can also be 24250-52600MHz, and the frequency range corresponding to FR2-1 can also be 52600-71000MHz.

[0239] In this disclosure, the TCI state, the joint TCI state of DL and UL (joint DL / UL TCI state, TCI state of both the channel / signal applied to DL and the channel / signal applied to UL), the DL TCI state (independent DL TCI state, TCI state of the channel / signal applied only to DL), and the UL TCI state (independent UL TCI state, TCI state of the channel / signal applied only to UL) can also be rewritten to each other.

[0240] In this disclosure, the joint transmission of multiple TRPs / cells based on a single DCI (joint transmission based on a single DCI, multi-TRP transmission based on a single DCI) can also be at least one of the following methods.

[0241] ◇ Space division multiplexing (SDM) method. This method can also associate different ports / layers of the DMRS transmitted by DL / UL with different TCI states.

[0242] ◇Frequency Division Multiplexing (FDM) method. This method can also involve associating different frequency domain resources transmitted by DL / UL with different TCI states separately.

[0243] ◇ Coherent joint transmission (CJT) mode. This mode can also involve associating different ports / layers of the DMRS transmitted by DL / UL with different TCI states separately.

[0244] ◇Single Frequency Network (SFN) mode. This mode can also involve associating different ports / layers of the DMRS transmitted by DL / UL with different TCI states separately.

[0245] ◇Time Division Multiplexing (TDM) method. This method can also involve associating different time-domain resources sent by DL / UL with different TCI states separately.

[0246] In this disclosure, the joint transmission of multiple TRPs / cells based on multiple DCI (joint transmission based on multiple DCI, multi-TRP transmission based on multiple DCI) can also be an association of multiple channels / signals of DL / UL with multiple different TCI states transmitted on multiple resources in overlapping time / frequency domains.

[0247] In this disclosure, the TCI state, beam, spatial relationship, Tx / Rx parameters in the spatial domain, QCL, and reference signal can also be rewritten.

[0248] In this disclosure, TRP, beam groups, TCI state groups, and RS resource sets / groups can also be rewritten to each other.

[0249] In this disclosure, the DCI indicating the TCI status can also schedule PDSCH / PUSCH.

[0250] In this disclosure, coordinated transmission can also be DL transmission or UL transmission using the indicated TCI state within multiple activated TCIs. In this disclosure, joint transmission can also be DL transmission or UL transmission using multiple indicated TCI states / TRPs / subcells. In this disclosure, single TRP transmission / coordinated transmission / joint transmission can also be applied to DL / UL.

[0251] The following implementation can also be applied to other scenarios that use more TRPs than those in the existing specifications.

[0252] (Wireless communication method)

[0253] <Implementation Method 1>

[0254] This implementation involves the RRC setting (RRC IE, list) of the TCI state.

[0255] It is also possible to set up to N for a single supercell / cell via RRC. Tci N TCI states. Tci It can also be the maximum number of TCI states within the RRC settings.

[0256] N Tci It can also be greater than 128. N Tci Alternatively, it may follow at least one of the following formulas.

[0257] ◇N Tci =MTci-perTrp *N Trp

[0258] ◇N Tci =M Tci-perCell *N Cell

[0259] N Tci 、N Trp 、N Cell 、M Tci-perCell 、M Tci-perTrp At least one of them can be defined in the specification, provided by RRC, or reported as UE capabilities.

[0260] N Trp It can also refer to the number of TRPs associated with the same one PCI or multiple different PCIs within a supercell / cell. N Cell It can also refer to the number of subcells associated with different PCIs within a supercell / cell. M Tci-perTrp It can also refer to the number (maximum number) of TCI states for each TRP in a supercell / cell. M Tci-perCell It can also refer to the number (maximum number) of TCI states for each subcell in a supercell / cell.

[0261] <<Application to Scenario 2>>

[0262] For the aforementioned Scenario 2, at least one of the following several features can also be applied.

[0263] ◇ Multiple TCI states set within the RRC configuration can also be associated with SSB / CSI-RS of multiple different PCIs.

[0264] ◇ It can also provide up to N Cell different PCIs. Compared with the existing NR, N Cell can also be greater than 8.

[0265] ◇ When providing N PCIs, the N PCIs can also include one serving cell PCI and N - 1 additional PCIs different from the serving cell PCI.

[0266] <<RRC Signaling Structure>>

[0267] The RRC signaling structure can also follow at least one of the following several options.

[0268] ◇ Option 1

[0269] A single list of N TCI states is provided for one supercell / cell. All TCI states within this single list can also correspond to multiple different TRPs / subcells, and can be assigned indices from 0 to N-1. Figure 4 In this example, one TCI status list is set up for one supercell / cell. This TCI status list contains N TCI states. The N TCI states are each indexed (TCI status ID) from 0 to N-1.

[0270] Option 2

[0271] Provides a list of multiple TCI states for each TRP of a supercell / cell. This option may also follow at least one of the following options 2-x.

[0272] -◇Option 2-1: All TCI states (N TCI states) across the entire list of all TRPs / subcells for a supercell / cell can also be assigned indices from 0 to N-1. Figure 5 In the example, for one supercell / cell, X TCI state lists #0, #1, ..., #X-1 are set up, each corresponding to one of X TRPs / subcells #0, #1, ..., #X-1 (TRP / subcell IDs = 0, 1, ..., X-1). TCI state list #i contains M... i There are Σ TCI states. The total number N of TCI states that iterate over the TCI state list #0, #1, ..., #X-1 (TCI state list ID=0, 1, ..., X-1) is Σ. i=0 X-1 M i For M in the TCI status list #i i Each TCI state is assigned an index (TCI state ID) Σ k=0 i-1 M k 、(Σ k=0 i-1 M k )+1、……、(Σ k=0 i-1 M k )+M i The index is -1. Assign indices 0, 1, ..., N-1 to the N TCI states within the list of X TCI states.

[0273] -◇Option 2-2: All TCI states (M TCI states) within a list of one TRP / subcell for a supercell / cell can also be assigned indices from 0 to M-1. Figure 6In the example, for one super cell / cell, X TCI state lists #0, #1, …, #X-1 (TCI state list IDs = 0, 1, …, X-1) corresponding to X TRPs / sub-cells #0, #1, …, #X-1 (TRP / sub-cell IDs = 0, 1, …, X-1) are set respectively. TCI state list #i contains M i TCI states. For the M i TCI states in TCI state list #i, indexes (TCI state IDs) 0, 1, …, M i -1 are assigned respectively.

[0274] <<Other application examples>>

[0275] This embodiment can also be applied to the case where the total number of TCI states set for one super cell / cell is 128 or less (the maximum value N Tci of the total number of TCI states set for one super cell / cell is 128 or less).

[0276] <<Relationship between TRP / sub-cell and TCI state>>

[0277] TCI states of the same TRP / sub-cell may also have something in common.

[0278] UL transmission may also follow at least one of the following several associations 1-x.

[0279] ◇ Association 1-1: UL transmission using TCI states of the same 1 TRP / sub-cell may also be associated with the same 1 timing advance (TA, timing advance group, TAG). UL transmission using TCI states of different multiple TRPs / sub-cells may also be associated with different multiple TAs (TAGs).

[0280] ◇ Association 1-2: UL transmission using TCI states of the same 1 TRP / sub-cell may also be associated with the same 1 power control parameter set. UL transmission using TCI states of different multiple TRPs / sub-cells may also be associated with different multiple power control parameter sets. One power control parameter set may also include at least one of P0, alpha, and path loss.

[0281] ◇Association 1-3: UL transmissions using the same TCI state of a single TRP / subcell can also be associated with the same SRS resource set used by the codebook / non-codebook. UL transmissions using multiple different TRPs / subcells with different TCI states can also be associated with multiple different SRS resource sets used by the codebook / non-codebook.

[0282] ◇Association 1-4: UL transmissions using the same TCI state of a single TRP / subcell can also be associated with the same scrambling ID. UL transmissions using multiple different TRP / subcell TCI states can also be associated with multiple different scrambling IDs.

[0283] DL sending can also follow at least one of the following associations 2-x.

[0284] ◇Association 2-1: DL transmissions using the same TCI state of a single TRP / subcell can also be associated with the same power control parameter set. DL transmissions using multiple different TRP / subcell TCI states can also be associated with multiple different power control parameter sets. A power control parameter set can also include at least one of the following: SSB transmission power, CSI-RS transmission power offset relative to the SSB, and CSI-RS transmission power.

[0285] ◇Related 2-2: DL transmissions using the same TRP / subcell TCI state can be QCL (quasi-co-located) with respect to several properties or several QCL types. The properties may include at least one of Doppler offset, average delay, Doppler spread, and delay spread. The QCL types may include at least one of 'Type A', 'Type B', 'Type C', and 'Type D'.

[0286] ◇Association 2-3: DL transmissions using the same TCI state of a single TRP / subcell can also be associated with the same scrambling ID. DL transmissions using multiple different TRP / subcell TCI states can also be associated with multiple different scrambling IDs.

[0287] According to this implementation, even if the cell and TRP associations are changed, the UE can still be properly set / indicated in TCI status.

[0288] <Implementation Method 2>

[0289] This implementation involves the transmission of DL / UL for a single TRP / subcell (single TRP transmission).

[0290] <<Number of activated TCI states>>

[0291] It is also possible to activate up to X instances of a single supercell / cell, or a single BWP within a single supercell / cell, using the MACCE command (activate MAC CE, activation command). Tci TCI states. X Tci It can also be the maximum number of TCI states within the MAC CE command.

[0292] X Tci It can also be greater than 8. X Tci Alternatively, it may follow at least one of the following formulas.

[0293] ◇X Tci =Y Tci-perTrp *N Trp

[0294] ◇X Tci =Y Tci-perCell *N Cell

[0295] X Tci N Trp N Cell Y Tci-perCell Y Tci-perTrp At least one of these can be defined in the specification, provided by the RRC, or reported as a UE capability.

[0296] N Trp It can also refer to the number of TRPs within a supercell / cell that share the same single PCI or multiple different PCIs, used for coordinated transmission. This coordinated transmission can also be a dynamic handover between these multiple TRPs. N Cell It can also refer to the number of supercells / subcells within a cell that have different PCIs used for coordinated transmission. This coordinated transmission can also be a dynamic handover between these multiple TRPs. Tci-perTrp It can also refer to the number of TCI states (maximum number) for each TRP of a supercell / cell. Tci-perCell It can also refer to the number of TCI states (maximum number) of each sub-cell of a supercell / cell.

[0297] <<Application to Concept 2>>

[0298] At least one of the following features may also be applied to the aforementioned assumption 2.

[0299] ◇Multiple TCI states activated by MAC CE can also be associated with SSB / CSI-RS of different multiple PCIs. Multiple TCI states of up to N Cell different PCIs can also be activated. Compared with existing NR, N Cell can also be greater than 8.

[0300] ◇When multiple TCI states of N PCIs are activated, the N PCIs can either include 1 serving cell PCI and N - 1 additional PCIs different from the serving cell PCI, or be N additional PCIs different from the serving cell PCI.

[0301] <<Other application examples>>

[0302] This embodiment can also be applied to the case where the total number of TCI states activated for 1 supercell / cell is 8 or less (the maximum value X Tci of the TCI states activated for 1 supercell / cell is 8 or less).

[0303] <<Activation of TCI states>>

[0304] The mapping between the MAC CE signaling structure, the TCI states activated by MAC CE, and the code points of the TCI field in DCI can also follow at least one of the following several options.

[0305] ◇Option 1

[0306] One MAC CE command activates multiple TCI states across all TRPs / sub - cells of 1 supercell / cell. Multiple code points of the TCI field in DCI can also be respectively mapped to the multiple TCI states activated across all TRPs / sub - cells of 1 supercell / cell. The increase in the activated TCI states sometimes causes signaling overhead. This option can also have at least one of the following several characteristics.

[0307] -◇In the Figure 7 example, multiple TCI states across all TRPs / sub - cells of 1 supercell / cell are activated by one MAC CE. The multiple activated TCI states (TCI state IDs) 0, 2, 8,... are respectively mapped to the multiple code points 0, 1, 2,... of the TCI field in DCI.

[0308] ◇Option 2

[0309] A single MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Multiple code points of the TCI field within the DCI are respectively mapped to the multiple TCI states activated for one TRP / subcell of one supercell / cell. This option may also have at least one of the following characteristics.

[0310] -◇The MAC CE can also contain an index corresponding to the TRP / subcell.

[0311] -◇DCI can also indicate the index corresponding to the TRP / subcell. This option can also be represented by the following example.

[0312] -◇In Figure 8 In the example, a first MAC CE activates multiple TCI states for TRP / subcell #0 of a supercell / cell. These multiple TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ... of the TCI field within the DCI of TRP / subcell #0. A second MAC CE activates multiple TCI states for TRP / subcell #1 of the same supercell / cell. These multiple TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ... of the TCI field within the DCI of TRP / subcell #1. A third MAC CE activates multiple TCI states for TRP / subcell #2 of the same supercell / cell. These multiple TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ... of the TCI field within the DCI of TRP / subcell #2.

[0313] Option 3

[0314] A single MAC CE command activates multiple TCI states for all TRPs / subcells of a single supercell / cell. Multiple code points of the TCI field within the DCI are mapped to the activated multiple TCI states for a single TRP / subcell of a single supercell / cell. This option may also have at least one of the following characteristics.

[0315] -◇The initial Y0 TCI states (first TCI state group #0) among the activated multiple TCI states can also correspond to the first TRP / sub-cell #0 in all TRPs / sub-cells of a supercell / cell. The subsequent Y1 TCI states (second TCI state group #1) among the activated multiple TCI states can also correspond to the second TRP / sub-cell #1 in all TRPs / sub-cells of that supercell / cell.

[0316] -◇DCI can also indicate the index corresponding to the TRP / subcell. This option can also be represented by the following example.

[0317] -◇In Figure 9 In the example, a single MAC CE activates multiple TCI states across all TRPs / subcells within a single supercell / cell. The initial Y0 TCI states (TCI state IDs) 1, 5, ..., 102 of the activated TCI states are mapped to multiple code points 0, 1, ... of the TCI field within the DCI for TRP / subcell #0. The subsequent Y1 TCI states 134, 136, ..., 231 of the activated TCI states are mapped to multiple code points 0, 1, ... of the TCI field within the DCI for TRP / subcell #1. The subsequent Y2 TCI states 267, 277, ..., 387 of the activated TCI states are mapped to multiple code points 0, 1, ... of the TCI field within the DCI for TRP / subcell #2.

[0318] Option 4

[0319] A single MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Multiple code points of the TCI field within the DCI can also be mapped to multiple activated TCI states across all TRPs / subcells of one supercell / cell. This option may also have at least one of the following characteristics.

[0320] -◇The MAC CE can also contain an index corresponding to 1 TRP / subcell.

[0321] -◇The initial Y0 code points (first code point group #0) of multiple code points in the TCI field within the DCI can also correspond to the first TRP / sub-cell #0 of all TRPs / sub-cells in a supercell / cell. The subsequent Y1 code points (second code point group #1) of multiple code points in the TCI field within the DCI can also correspond to the second TRP / sub-cell #1 of all TRPs / sub-cells in that supercell / cell. This option can also be represented by the following example.

[0322] -◇In Figure 10In the example, the first MAC CE activates Y0 TCI states for TRP / subcell #0 of a supercell / cell. These Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to the initial Y0 code points 0, 1, ..., Y0-1 in the multiple code points of the TCI field within the DCI. The second MAC CE activates Y1 TCI states for TRP / subcell #1 of the same supercell / cell. These Y1 TCI states 134, 136, ..., 231 are mapped to the subsequent Y1 code points Y0, Y0+1, ..., Y0+Y1-1 in the multiple code points of the TCI field within the DCI. The third MAC CE activates Y2 TCI states for TRP / subcell #2 of the same supercell / cell. The Y2 TCI states 267, 277, ..., 387 are respectively mapped to the subsequent Y2 code points Y0+Y1, Y0+Y1+1, ..., Y0+Y1+Y2-1 in the multiple code points of the TCI field within the DCI.

[0323] According to this implementation, even if the cell and TRP associations are changed, the UE can be appropriately set / indicated for the TCI state of transmission for a single TRP / subcell (single TRP transmission).

[0324] <Implementation Method 3>

[0325] This implementation involves the joint transmission of DL / UL of multiple TRPs / subcells based on a single DCI (joint transmission of multiple TRPs based on a single DCI).

[0326] <<Number of Activated TCI States>>

[0327] It is also possible to activate up to X instances of a single supercell / cell, or a single BWP within a single supercell / cell, using the MACCE command (activate MAC CE, activation command). Tci TCI states. X Tci It can also be the maximum number of TCI states within the MAC CE command.

[0328] X Tci It can also be greater than 16. X Tci Alternatively, it may follow at least one of the following formulas.

[0329] ◇X Tci =Y Tci-perTrp *N Trp

[0330] ◇X Tci =Y Tci-perCell *N Cell

[0331] ◇X Tci =Y Tci-perTciGroup *N TciGroup

[0332] ◇X Tci =Y Tci-perTciGroup *N TciGroup-PerTrpGroup *N TrpGroup

[0333] ◇X Tci =Y Tci-perTciGroup *N TciGroup-PerCellGroup *N CellGroup

[0334] X Tci N Trp N Cell Y Tci-perCell Y Tci-perTrp Y Tci-perTciGroup N TciGroup N TciGroup-PerTrpGroup N TrpGroup N TciGroup-PerCellGroup N CellGroup At least one of these can be defined in the specification, provided by the RRC, or reported as a UE capability.

[0335] N Trp It can also refer to the number of TRPs within a supercell / cell that share the same single PCI or multiple different PCIs for joint transmission. Compared to NR, N... Trp It can also be greater than 2. N Cell It can also refer to the number of supercells / subcells within a cell that have different PCIs used for joint transmission. Tci-perTrp It can also refer to the number of TCI states (maximum number) for each TRP of a supercell / cell. Tci-perCell It can also refer to the number of TCI states (maximum number) of each sub-cell of a supercell / cell.

[0336] Y Tci-perTciGroup One group of TCI states can also be used for joint transmission. MAC CE can also activate up to N TCI states. TciGroup Groups. Compared to NR, Y Tci-perTciGroup It can also be greater than 2, N TciGroup It can also be greater than 8.

[0337] Y Tci-perTciGroup One group of TCI states can also be used for joint transmission. Groups of TRP / subcell can also be used for joint transmission. MAC CE can also activate up to N TRP states. TrpGroupThe TCI states of each group. Alternatively, for each group in the TRP, N TCI states can be activated. TciGroup-PerTrpGroup Groups. MAC CE can also activate up to N sub-cells. CellGroup The TCI status of each group. It is also possible to activate N TCI statuses for each group within a sub-cell. TciGroup-PerCellGroup There are several groups. For example, the 4TRP groups are {TRP#1, TRP#2}, {TRP#1, TRP#3}, {TRP#2, TRP#4}, and {TRP#3, TRP#4}. For each TRP group, 8 TCI state groups are activated. Each TCI state group contains 2 TCI states, and a total of 64 TCI states are activated.

[0338] <<Application to Concept 2>>

[0339] Alternatively, at least one of the following features can be applied to the aforementioned assumption 2.

[0340] ◇In NR, joint transmission of multiple TRPs based on a single DCI using multiple different PCIs is not supported. In this implementation, joint transmission of multiple TRPs based on a single DCI using multiple different PCIs is supported.

[0341] ◇ Multiple TCI states activated via MAC CE can also be associated with the SSB / CSI-RS of different PCIs. A group of TCI states applied to joint transmissions can also be associated with the SSB / CSI-RS of different PCIs.

[0342] ◇It can also activate up to N Cell Multiple TCI states for different PCIs.

[0343] ◇When multiple TCI states of N PCIs are activated, the N PCIs can include either one serving cell PCI and N-1 additional PCIs that are different from the serving cell PCI, or N additional PCIs that are different from the serving cell PCI.

[0344] ◇Changes: Multiple TRPs can also be associated with one PCI. Multiple TCI states activated via MAC CE can also be associated with the SSB / CSI-RS of different PCIs. A group of TCI states applied to joint transmissions can also be associated with the SSB / CSI-RS of the same PCI.

[0345] <<Other Application Examples>>

[0346] This embodiment can also be applied to the case where the total number of TCI states activated for one supercell / cell is 16 or less (the maximum value X of the TCI states activated for one supercell / cell is 16 or less). Tci in the case of 16 or less).

[0347] <<Activation of TCI State>>

[0348] The mapping between the MAC CE signaling structure, the TCI states activated by the MAC CE, and the code points of the TCI fields in the DCI can also follow at least one of the following several options.

[0349] ◇ Option 1

[0350] One MAC CE command activates multiple TCI states for all TRPs / sub-cells across one supercell / cell. One field in the DCI (e.g., the TCI field) can also be used for TCI indication. The code point i of the TCI field in the DCI can also be mapped to Yi TCI states activated by the MAC CE. This option can also have at least one of the following several characteristics.

[0351] -◇ When the code point i is indicated, the corresponding Yi TCI states can also be used for joint transmission. When Yi = 1, transmission of a single TRP / sub-cell using the indicated one TCI state can also be performed. [[ID=URL]]

[0352] -◇ The Yi TCI states can also correspond to Yi TRPs / sub-cells of one supercell / cell.

[0353] -◇ Yi can also be 1, 2,..., Ymax.

[0354] -◇ Ymax can also be the maximum number of TCI states / TRPs / sub-cells used for joint transmission.

[0355] -◇ Different multiple code points can also be mapped to different numbers of TCI states.

[0356] -◇ The MAC CE can also indicate the number of TCI states to which the code points are mapped. For example, the MAC CE can indicate Yi.

[0357] -◇ In Figure 11In this example, the UE receives a single MAC CE activating multiple TCI states across all TRPs / subcells of a single supercell / cell, and receives a DCI containing a TCI field. The activated multiple TCI states are grouped into Y0, Y1, ... TCI states. The code point 0 of the TCI field indicates the initial Y0 TCI states (TCI state IDs) 0, 133, ..., 301 among the activated multiple TCI states. The code point 1 of the TCI field indicates the subsequent Y1 TCI states 2, 156 among the activated multiple TCI states.

[0358] Option 2

[0359] A single MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Ymax fields within the DCI (e.g., TCI fields) can also be used for TCI indication. A single code point in one field within the DCI can also be mapped to a single TCI state activated via MAC CE. This option may also have at least one of the following characteristics.

[0360] -◇The Y fields from the Ymax fields can also indicate a valid TCI status. These other fields can also represent code points indicating that the field is not in use. Y can also be 1, 2, ..., Ymax.

[0361] -◇Ymax can also be the maximum number of TCI states / TRPs / subcells used for joint transmission.

[0362] -◇The Y TCI states indicated by the Y fields can also be used for joint transmission. When Y=1, transmission of a single TRP / subcell can also be performed using a single TCI state indicated by this single field.

[0363] -◇For example, a maximum of 4 TRPs / subcells can also be used for joint transmission. There are 4 fields in the DCI. One, two, three, or four fields can also indicate a valid TCI status. One, two, three, or four TCI statuses / TRPs / subcells can also be used for joint transmission.

[0364] -◇Changes: The Zmax fields within the DCI can also be used for TCI indication. Zmax can also refer to the number of candidate TRPs / subcells. TRPs / subcells used for joint transmission can also be selected from the candidate TRPs / subcells. Y fields from the Zmax fields can also indicate valid TCI states; these other fields can also represent code points indicating that the field is not used. Y can also be 1, 2, ..., Ymax. The Y TCI states indicated by the Y fields can also be used for joint transmission. Ymax can also be the maximum number of TCI states / TRPs / subcells used for joint transmission. It can also be Zmax ≥ Ymax. For example, in the case of 6 candidate TRPs / subcells and 5 fields within the DCI, a maximum of 4 fields indicate valid TCI states, and a maximum of 4 TRPs / subcells are used for joint transmission.

[0365] -◇In Figure 12 In the example, the UE receives Y MAC CEs #0, #1, and #2 corresponding to Y=3 TRPs / subcells #0, #1, and #2 (TRP / subcell IDs = 0, 1, and 2) of one supercell / cell, and receives a DCI containing Y TCI fields. Y0 TCI states for TRP / subcell #0 (the first TRP / subcell) are activated via MAC CE #0 (the first MAC CE). These Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ..., Y0-1 of the TCI field #0 (the first TCI field) within the DCI. Y1 TCI states for TRP / subcell #1 (the second TRP / subcell) are activated via MAC CE #1 (the second MAC CE). The Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 in TCI field #1 (the second TCI field) within the DCI. The Y2 TCI states for TRP / subcell #2 (the third TRP / subcell) are activated via MAC CE#2 (the third MAC CE). The Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 in TCI field #2 (the third TCI field) within the DCI.

[0366] Option 3

[0367] A single MAC CE command activates multiple TCI states across all TRPs / subcells of a supercell / cell. A single field within the DCI (e.g., the TCI field) can also correspond to a single TRP / subcell of a supercell / cell. A single code point within the DCI can also be mapped to a single TCI state activated via MAC CE. This option may also have at least one of the following characteristics.

[0368] -◇The first Y0 TCI states (first TCI state group #0) among the multiple TCI states activated by MAC CE can also correspond to the first (#0) TRP / subcell / field, and the subsequent Y1 TCI states (second TCI state group #1) can also correspond to the second (#1) TRP / subcell / field.

[0369] -◇The Y fields from the Ymax fields can also indicate a valid TCI status. These other fields can also represent code points indicating that the field is not in use. Y can also be 1, 2, ..., Ymax.

[0370] -◇Ymax can also be the maximum number of TCI states / TRPs / subcells used for joint transmission.

[0371] -◇The Y TCI states indicated by the Y fields can also be used for joint transmission. When Y=1, transmission of a single TRP / subcell can also be performed using a single TCI state indicated by this single field.

[0372] -◇Changes: The Zmax fields within the DCI can also be used for TCI indication. Zmax can also refer to the number of candidate TRPs / subcells. TRPs / subcells used for joint transmission can also be selected from the candidate TRPs / subcells. Y fields from the Zmax fields can also indicate valid TCI states; these other fields can also represent code points indicating that the field is not used. Y can also be 1, 2, ..., Ymax. The Y TCI states indicated by the Y fields can also be used for joint transmission. Ymax can also be the maximum number of TCI states / TRPs / subcells used for joint transmission. It can also be Zmax ≥ Ymax. For example, there are 6 candidate TRPs / subcells. There are 5 fields within the DCI. A maximum of 4 fields indicate valid TCI states, and a maximum of 4 TRPs / subcells are used for joint transmission.

[0373] -◇In Figure 13In the example, the UE receives one MAC CE activating multiple TCI states across Y=3 TRP / subcell #0, #1, #2 (TRP / subcell IDs=0, 1, 2) spanning one supercell / cell, and receives a DCI containing Y TCI fields. The initial Y0 TCI states (first TCI state group #0) among the activated multiple TCI states correspond to TRP / subcell #0 (first TRP / subcell). These Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ..., Y0-1 of TCI field #0 (first TCI field) within the DCI. The subsequent Y1 TCI states (second TCI state group #1) among the activated multiple TCI states correspond to TRP / subcell #1 (second TRP / subcell). The Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 in TCI field #1 (the second TCI field) within the DCI. The subsequent Y2 TCI states (the third TCI state group #2) among the activated TCI states correspond to TRP / subcell #2 (the third TRP / subcell). The Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 in TCI field #2 (the third TCI field) within the DCI.

[0374] Option 4

[0375] A single MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. A field within the DCI (e.g., the TCI field) can also be used for TCI indication. The code point i of the TCI field within the DCI can also be mapped to Yi TCI states activated via MAC CE. This option may also have at least one of the following characteristics.

[0376] -◇When code point i is indicated, the corresponding Yi TCI states can also be used for joint transmission. When Yi=1, transmission can also be performed using a single TRP / subcell with one indicated TCI state.

[0377] -◇Yi TCI states can also correspond to Yi TRPs / subcells of one supercell / cell.

[0378] -◇Yi can also be 1, 2, ..., Ymax.

[0379] -◇Ymax can also be the maximum number of TCI states / TRPs / subcells used for joint transmission.

[0380] -◇Different code points can also be mapped to different numbers of TCI states.

[0381] -◇In Figure 14 In the example, the UE receives Y MAC CEs #0, #1, and #2 corresponding to Y=3 TRPs / subcells #0, #1, and #2 (TRP / subcell IDs = 0, 1, and 2) of one supercell / cell, and receives a DCI containing one TCI field. Y TCI states for TRP / subcell #0 (the first TRP / subcell) are activated via MAC CE #0 (the first MAC CE). These Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ..., Y0-1 of the TCI field within the DCI. Y1 TCI states for TRP / subcell #1 (the second TRP / subcell) are activated via MAC CE #1 (the second MAC CE). The Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 in the TCI field within the DCI. The Y2 TCI states for TRP / subcell #2 (the third TRP / subcell) are activated via MAC CE#2 (the third MAC CE). The Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 in the TCI field within the DCI.

[0382] According to this implementation, even if the cell and TRP associations are changed, the UE can be appropriately set / indicated for the TCI status of joint transmission of multiple TRPs / subcells based on a single DCI (multiple TRP joint transmission based on a single DCI).

[0383] <Implementation Method 4>

[0384] This implementation relates to other methods for the joint transmission of DL / UL of multiple TRPs / subcells based on a single DCI (joint transmission of multiple TRPs based on a single DCI).

[0385] The TCI indication method can also be the same as the Rel.18 unified TCI framework in NR.

[0386] <<Number of Activated TCI States>>

[0387] The UE can also maintain Zmax TCI states at all times. Zmax can also be the number of candidate TRPs / subcells. Multiple TRPs / subcells used for joint transmission can also be selected from multiple candidate TRPs / subcells. For each of DL transmission and UL transmission, it can be indicated that Y TCI states / TRPs / subcells from Zmax TCI states / TRPs / subcells will be used for joint transmission. In the case of Y=1, transmission of a single TRP / subcell (single TRP transmission) can also be performed. The TCI state can also have at least one of the following characteristics.

[0388] ◇Y can also be 1, 2, ..., Ymax. Ymax can also be the maximum number of TCI states / TRPs / subcells used for joint transmission.

[0389] ◇Compared to NR, Zmax can also be greater than 2, and Ymax can also be greater than 2.

[0390] For example, in the case where there are 6 candidate TRPs / subcells and a maximum of 4 TRPs / subcells are used in joint transmission, the UE is instructed to always maintain 6 TCI states and use a maximum of 4 TCI states from the 6 TCI states for joint transmission in each of DL transmission and UL transmission.

[0391] MAC CE activation in TCI state can also have at least one of the following characteristics.

[0392] ◇It can also be applied to a single supercell / cell, or to a single BWP within a single supercell / cell, up to X Tci Each TCI state is activated via the MAC CE command (activate MAC CE, activation command). X Tci It can also be the maximum number of TCI states within the MAC CE command.

[0393] ◇X Tci It can also be greater than 16. X Tci Alternatively, it may follow at least one of the following formulas.

[0394] -◇X Tci =Y Tci-perTrp *N Trp

[0395] -◇X Tci =Y Tci-perCell *N Cell

[0396] ◇X Tci N Trp N Cell Y Tci-perCell YTci-perTrp At least one of them can be defined in the specification, provided by RRC, or reported as UE capabilities.

[0397] ◇N Trp It can also refer to the number of multiple TRPs with the same 1 PCI or different multiple PCIs in a supercell / cell for joint transmission.

[0398] ◇N Cell It can also refer to the number of multiple sub - cells with different multiple PCIs in a supercell / cell for joint transmission.

[0399] ◇Y Tci-perTrp It can also refer to the number (maximum number) of TCI states for each TRP in a supercell / cell.

[0400] ◇Y Tci-perCell It can also refer to the number (maximum number) of TCI states for each sub - cell in a supercell / cell.

[0401] <<Application to Scenario 2>>

[0402] At least one of the following several features can also be applied to the aforementioned Scenario 2.

[0403] ◇Multiple TCI states activated by MAC CE can also be associated with SSB / CSI - RS of different multiple PCIs.

[0404] ◇Up to N Cell multiple TCI states of different PCIs can also be activated.

[0405] ◇When multiple TCI states of N PCIs are activated, the N PCIs can either include 1 serving cell PCI and N - 1 additional PCIs different from the serving cell PCI, or be N additional PCIs different from the serving cell PCI.

[0406] <<Other Application Examples>>

[0407] This embodiment can also be applied to the case where the total number of TCI states activated for 1 supercell / cell is 16 or less (the maximum value X Tci of the TCI states activated for 1 supercell / cell is 16 or less).

[0408] <<Activation / Update of TCI States>>

[0409] The mapping between the MAC CE signaling structure, the TCI state activated by the MAC CE, and the code points of the TCI field in the DCI can also follow at least one of the following options. The signal structure is the same as in Implementation 3, but the interpretation of the signal differs from that in Implementation 3.

[0410] Option 1

[0411] A single MAC CE command activates multiple TCI states across all TRPs / subcells of a supercell / cell. A single field within the DCI (e.g., the TCI field) can also be used for TCI indication. The code point i of the TCI field within the DCI can also be mapped to the Zi TCI states activated via MAC CE. This option may also have at least one of the following characteristics.

[0412] -◇When code point i is indicated, Zi TCI states from Zmax TCI states can also be updated. Other TCI states can remain unchanged.

[0413] -◇Zi TCI states can also correspond to 1 supercell / cell's Zi TRPs / subcells.

[0414] -◇Zi can also be 1, 2, ..., Zmax.

[0415] -◇Different code points can also be mapped to different numbers of TCI states.

[0416] -◇MAC CE can also indicate the number of TCI states that have been mapped to code points. For example, MAC CE can also indicate Zi.

[0417] Option 2

[0418] A single MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Zmax fields within the DCI (e.g., TCI fields) can also be used for TCI indication. A single field can also correspond to one candidate TRP / subcell. A single code point in a single field can also be mapped to a single TCI state activated via MAC CE. This option can also have at least one of the following characteristics.

[0419] -◇The Z fields from the Zmax fields can also indicate a valid TCI status. These other fields can also represent code points indicating that the field is not in use. Z can also be 1, 2, ..., Zmax.

[0420] -◇The Z TCI states indicated by the Z fields can also be updated. Other TCI states can remain unchanged.

[0421] Option 3

[0422] A single MAC CE command activates multiple TCI states across all TRPs / subcells of a supercell / cell. Zmax fields within the DCI (e.g., TCI fields) can also be used for TCI indication. A single field can also correspond to a single TRP / subcell of a supercell / cell. A single code point of a single field can also be mapped to a single TCI state activated via MAC CE. This option may also have at least one of the following characteristics.

[0423] -◇The first Y0 TCI states (first TCI state group #0) among the multiple TCI states activated by MAC CE can also correspond to the first (#0) TRP / subcell / field, and the subsequent Y1 TCI states (second TCI state group #1) can also correspond to the second (#1) TRP / subcell / field.

[0424] -◇The Z fields from the Zmax fields can also indicate a valid TCI status. These other fields can also represent code points, which indicate the use of that field. Z can also be 2, ..., Zmax.

[0425] -◇It is also possible to update the Z TCI states indicated by the Z fields. Other TCI states may remain unchanged.

[0426] Option 4

[0427] A single MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. A field within the DCI (e.g., the TCI field) can also be used for TCI indication. The code point i of the TCI field within the DCI can also be mapped to the Zi TCI states activated via MAC CE. This option may also have at least one of the following characteristics.

[0428] -◇When code point i is indicated, Zi TCI states from Zmax TCI states can also be updated. Other TCI states can remain unchanged.

[0429] -◇Zi TCI states can also correspond to 1 supercell / cell's Zi TRPs / subcells.

[0430] -◇Zi can also be 1, 2, ..., Zmax.

[0431] -◇Different code points can also be mapped to different numbers of TCI states.

[0432] exist Figure 15 In the example, the UE maintains Zmax=6 active TCI states. Then, the UE receives a DCI containing Zmax TCI fields. The second TCI field among the Zmax TCI fields indicates a valid TCI state. The UE updates the TCI state of the second TRP / subcell #1 (TRP / subcell ID=1) to the indicated valid TCI state.

[0433] exist Figure 16 In the example, the UE maintains Zmax=6 active TCI states. Then, the UE receives a DCI containing Zmax TCI fields. The 2nd and 4th TCI fields in the Zmax TCI fields indicate valid TCI states. The UE updates the TCI states of the 2nd TRP / subcell #1 (TRP / subcell ID=1) and the 4th TRP / subcell #3 to the indicated 2 valid TCI states respectively.

[0434] exist Figure 17A In the example, the UE maintains Zmax=6 active TCI states. Then, the UE receives an indication (e.g., DCI) to use Y=2 TRP / subcell / TCI states from the Zmax candidate TRP / subcell / TCI states for transmission. The UE uses the indicated second and third TRP / subcell / TCI states #1 and #2 (TRP / subcell IDs=1 and 2) for joint transmission.

[0435] exist Figure 17B In the example, the UE maintains Zmax=6 active TCI states. Then, the UE receives an indication (e.g., DCI) to use Y=4 of the Zmax candidate TRP / subcell / TCI states for transmission. The UE uses the indicated 1st, 2nd, 4th, and 6th TRP / subcell / TCI states #0, #1, #4, and #6 (TRP / subcell IDs = 0, 1, 4, and 6) for joint transmission.

[0436] exist Figure 17C In the example, the UE maintains Zmax=6 active TCI states. Then, the UE receives an indication (e.g., DCI) to use Y=1 of the Zmax candidate TRP / subcell / TCI states for transmission. The UE uses the indicated second TRP / subcell / TCI state #1 (TRP / subcell ID=1) for transmission of a single TRP / subcell.

[0437] According to this implementation, even if the association between the cell and the TRP is changed, the UE can be appropriately set / indicated for the TCI status of a single or multiple TRPs / sub-cells.

[0438] <Embodiment 5>

[0439] This embodiment relates to joint transmission of DL / UL for multiple TRPs / sub-cells based on multiple DCIs (multi-TRP joint transmission based on multiple DCIs).

[0440] Groups / pools of CORESET (CORESET group, CORESET pool, CORESETPoolIndex) can also be defined in the same way as in NR. The MAC CE command can also activate the TCI state of each CORESET group. Multiple code points of the TCI field in the DCI can also be respectively mapped to multiple TCI states for the corresponding CORESET group.

[0441] In the present disclosure, a CORESET group can also be a set of resources for DCI monitoring. For example, it can also be a group of search spaces / search space sets.

[0442] <<Relationship between CORESET group and TRP / sub-cell>>

[0443] The relationship between the CORESET group and the TRP / sub-cell can also follow at least one of the following several options.

[0444] ◇ Option 1

[0445] One CORESET group is mapped to one TRP / sub-cell of one super cell / cell. The UE can also receive multiple DCIs (multi-DCIs) respectively within multiple CORESET groups (CORESETs within multiple CORESET groups). Joint transmission of multiple TRPs / sub-cells based on multiple DCIs (multi-TRP joint transmission based on multiple DCIs) can also be performed. This option can also have at least one of the following several characteristics.

[0446] -◇ Compared with NR, more than two CORESET groups can also be set by RRC.

[0447] -◇ For one CORESET group, or for one super cell / cell, or for one BWP of one super cell / cell, up to X Tci TCI states can be activated by the MAC CE command (activation MAC CE, activation command).

[0448] -◇ One field in the DCI (for example, the TCI field) can also be used for TCI indication. One code point of the TCI field can be mapped to one TCI state.

[0449] -◇It can be applied to a single supercell / cell, or to a single BWP within a single supercell / cell, with a maximum activation limit of X. Tci *N CORESET-Group A total of X TCI states can be activated. Tci *N Trp Each TCI state can activate up to X Tci *N Cell Each TCI state. The parameters may also follow at least one of the following characteristics.

[0450] --◇N Trp It can also refer to the number of TRPs within a supercell / cell that share the same single PCI or multiple different PCIs, used for coordinated transmission / joint transmission. Compared to NR, N... Trp It can also be greater than 2.

[0451] --◇N Cell It can also refer to the number of supercells or subcells within a cell that have different PCIs used for coordinated transmission / joint transmission.

[0452] --◇N CORESET-Group It can also refer to the number of CORESET groups used for coordinating transmissions / joint transmissions. Compared to NR, N... CORESET-Group It can also be greater than 2.

[0453] --◇X Tci N Trp N Cell N CORESET-Group At least one of these can be defined in the specification, provided by the RRC, or reported as a UE capability.

[0454] -◇At least one of the following features may also be applied to the aforementioned assumption 2.

[0455] --◇ Multiple TCI states activated via MAC CE for a single CORESET group can also be associated with the SSB / CSI-RS of the same PCI.

[0456] --◇It can also be used to activate up to N supercells / cells. Cell Each PCI is associated with multiple TCI states. Compared to NR, N Cell It can also be greater than 2.

[0457] --◇When multiple TCI states of N PCIs are activated, the N PCIs can include either one serving cell PCI and N-1 additional PCIs that are different from the serving cell PCI, or N additional PCIs that are different from the serving cell PCI.

[0458] -◇In Figure 18 In the example, the UE receives Y MAC CEs #0, #1, and #2 corresponding to Y=3 CORESET groups / TRPs / subcells #0, #1, and #2 (CORESET group / TRP / subcell IDs = 0, 1, and 2) within one supercell / cell, and receives DCIs within each CORESET group. Each DCI contains one TCI field. Y0 TCI states for CORESET group / TRP / subcell #0 (the first CORESET group / TRP / subcell) are activated via MAC CE #0 (the first MAC CE). These Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ..., Y0-1 of the TCI field within the DCI of CORESET group #0. Activate the Y1 TCI states for CORESET group / TRP / subcell #1 (the second CORESET group / TRP / subcell) via MAC CE#1 (the second MAC CE). These Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 in the TCI field of the DCI within CORESET group #1, respectively. Activate the Y2 TCI states for CORESET group / TRP / subcell #2 (the third CORESET group / TRP / subcell) via MAC CE#2 (the third MAC CE). These Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 in the TCI field of the DCI within CORESET group #2, respectively.

[0459] Option 2

[0460] One CORESET group is mapped to multiple TRPs / subcells of one supercell / cell. Single TRP / subcell transmission with dynamic TRP / subcell handover based on DCI can also be performed within one CORESET group. This option may also have at least one of the following features.

[0461] -◇ Compared to NR, more than two CORESET groups can also be set via RRC.

[0462] -◇It can also activate up to X units via MAC CE for a single supercell / cell, or for a single BWP within a single supercell / cell, or for a single CORESET group. Tci TCI states. X Tci Alternatively, it may follow at least one of the following formulas.

[0463] --◇XTci =Y Tci-perTrp *N Trp

[0464] --◇X Tci =Y Tci-perCell *N Cell

[0465] Each parameter may also follow at least one of the following characteristics.

[0466] --◇N Trp It can also refer to the number of TRPs associated with the same CORESET group used for coordinated transmission, sharing the same single PCI or multiple different PCIs. Coordinated transmission can also use N-based methods. Trp One TRP that dynamically switches between TRPs.

[0467] --◇N Cell It can also refer to the number of multiple sub-cells with different PCIs associated with the same CORESET group used for coordinated transmission. Coordinated transmission can also use N-based methods. Cell One TRP for dynamic handover between sub-cells.

[0468] --◇Y Tci-perTrp It can also refer to the number of TCI states (maximum number) for each TRP of a supercell / cell. Tci-perCell It can also refer to the number of TCI states (maximum number) of each sub-cell of a supercell / cell.

[0469] --◇It can also be applied to a single supercell / cell, or to a single BWP within a single supercell / cell, with a maximum activation limit of X. Tci *N CORESET-Group N TCI states. CORESET-Group It can also refer to the number of CORESET groups in a supercell / cell, or in a BWP of a supercell / cell.

[0470] --◇X Tci N Trp N Cell Y Tci-perTrp Y Tci-perCell N CORESET-Group At least one of these can be defined in the specification, provided by the RRC, or reported as a UE capability.

[0471] -◇At least one of the following features can also be applied to the aforementioned assumption 2.

[0472] --◇Multiple TCI states activated by MAC CE for a single CORESET group can also be associated with SSB / CSI-RS of different PCIs.

[0473] --◇It can also be activated for a single CORESET group and up to N Cell Multiple TCI states were associated with different PCIs.

[0474] --◇It is also possible to activate multiple TCI states associated with up to N different PCIs for a single supercell / cell. N can be any number of different PCIs. Cell It can also be N Cell *N CORESET-Group .

[0475] --◇When multiple TCI states of N PCIs are activated, the N PCIs can include either one serving cell PCI and N-1 additional PCIs that are different from the serving cell PCI, or N additional PCIs that are different from the serving cell PCI.

[0476] Option 3

[0477] One CORESET group is mapped to multiple TRPs / subcells of one supercell / cell. Joint transmission of multiple TRPs / subcells based on a single DCI within one CORESET group is also possible (multi-TRP joint transmission based on a single DCI). This option may also have at least one of the following features.

[0478] -◇ Compared to NR, more than two CORESET groups can also be set via RRC.

[0479] -◇It can also activate up to X units via MAC CE for a single supercell / cell, or for a single BWP within a single supercell / cell, or for a single CORESET group. Tci TCI states. X Tci Alternatively, it may follow at least one of the following formulas.

[0480] --◇X Tci =Y Tci-perTrp *N Trp

[0481] --◇X Tci =Y Tci-perCell *N Cell

[0482] --◇X Tci =Y Tci-perTciGroup *N TciGroup

[0483] --◇X Tci =Y Tci-perTciGroup *N TciGroup-perTrpGroup *N TrpGroup

[0484] --◇X Tci =Y Tci-perTciGroup *N TciGroup-perCellGroup *N CellGroup

[0485] Each parameter may also follow at least one of the following characteristics.

[0486] --◇N Trp It can also refer to the number of TRPs associated with the same CORESET group used for joint transmission, and accompanied by the same 1 PCI or multiple different PCIs.

[0487] --◇N Cell It can also refer to the number of multiple sub-cells associated with the same CORESET group used for joint transmission and accompanied by different PCIs.

[0488] --◇Y Tci-perTrp It can also refer to the number of TCI states (maximum number) for each TRP of a supercell / cell. Tci-perCell It can also refer to the number of TCI states (maximum number) of each sub-cell of a supercell / cell.

[0489] --◇It is also possible to apply Y to joint transmissions. Tci-perTciGroup One group of TCI states. MAC CE can also activate N TCI states. TciGroup Groups. Compared to NR, Y Tci-perTciGroup It can also be greater than 2.

[0490] --◇It is also possible to apply Y to joint transmissions. Tci-perTciGroup One group for each TCI state. One group for each TRP / subcell can also be used for joint transmission. MAC CE can also activate N for TRP. TrpGroup The TCI states of each group. Alternatively, for each group in the TRP, N TCI states can be activated. TciGroup-perTrpGroup Groups. MAC CE can also activate N for sub-cells. CellGroup The TCI status of each group. It is also possible to activate N TCI statuses for each group within a sub-cell. TciGroup-perCellGroup Groups.

[0491] --◇It can also be applied to a single supercell / cell, or to a single BWP within a single supercell / cell, with a maximum activation limit of X. Tci *N CORESET-GroupN TCI states. CORESET-Group It can also refer to the number of CORESET groups in a supercell / cell, or in a BWP of a supercell / cell.

[0492] --◇X Tci N Trp N Cell Y Tci-perTrp Y Tci-perCell N CORESET-Group Y Tci-perTciGroup N TciGroup N TciGroup-perTrpGroup N TrpGroup N TciGroup-perCellGroup N CellGroup At least one of these can be defined in the specification, provided by the RRC, or reported as a UE capability.

[0493] -◇At least one of the following features can also be applied to the aforementioned assumption 2.

[0494] --◇Multiple TCI states activated via MAC CE for a single CORESET group can also be associated with SSB / CSI-RS of different PCIs. Groups of TCI states applied in joint transmission based on a single DCI can also be associated with SSB / CSI-RS of different PCIs.

[0495] --◇Also, for a single CORESET group, activation can be performed with up to N... Cell Multiple TCI states were associated with different PCIs.

[0496] --◇It is also possible to activate multiple TCI states associated with up to N different PCIs for a single supercell / cell. N can be any number of different PCIs. Cell It can also be N Cell *N CORESET-Group .

[0497] --◇When multiple TCI states of N PCIs are activated, the N PCIs can include either one serving cell PCI and N-1 additional PCIs that are different from the serving cell PCI, or N additional PCIs that are different from the serving cell PCI.

[0498] --◇Changes: Multiple TRPs can also be associated with one PCI. Multiple TCI states activated via MAC CE for one CORESET group can also be associated with SSB / CSI-RS of different PCIs. One group of TCI states used for joint transmission based on a single DCI can also be associated with SSB / CSI-RS of the same PCI.

[0499] --◇Changes: Multiple TRPs can also be associated with one PCI. Multiple TCI states activated via MAC CE for one CORESET group can also be associated with the SSB / CSI-RS of the same PCI. A group of TCI states applied to joint transmissions based on a single DCI can also be associated with the SSB / CSI-RS of the same PCI.

[0500] <<Application of Other Implementation Methods>>

[0501] The mapping between the MAC CE signaling structure, the TCI state activated by MAC CE, and the code points of the TCI field in the DCI can also be implemented by applying implementation method 2 / 3 / 4 on a per CORESET group basis, thereby switching to implementation method 2 / 3 / 4.

[0502] According to this implementation, even if the association between the cell and the TRP is changed, the UE can be appropriately set / indicated for the TCI status of a single or multiple TRPs / sub-cells based on a single DCI or multiple DCIs.

[0503] <Implementation Method 6>

[0504] This implementation involves MAC CE overhead.

[0505] To reduce MAC CE overhead, the following methods can also be applied to at least one of embodiments 1 to 5.

[0506] <<Update of a subset of activated TCI states>>

[0507] The MAC CE command (activate MAC CE, activation command) can also update a subset of TCI states for a single supercell / cell, or for a single TRP / subcell of a single supercell / cell. Alternatively, other TCI states activated via previous MAC CE commands can be maintained. This implementation can also follow at least one of the following options.

[0508] Option 1

[0509] A subset of activated TCI states can also be replaced by a new subset of activated TCI states. Figure 19In the example, the MAC CE indicates the TCI states (TCI state IDs) 10, 12, and 43 for the 3rd, 4th, and 5th TCI states (TCI states corresponding to code points 2, 3, and 4) among the multiple active TCI states. Based on the reception of this MAC CE, the UE updates the indicated active TCI states and maintains (does not update) the active TCI states other than the indicated TCI states.

[0510] Option 2

[0511] A subset of activated TCI states is updated to be deactivated (released). Figure 20 In the example, the MAC CE indicates the deactivation of the 3rd, 4th, and 5th TCI states (corresponding to code points 2, 3, and 4) among the multiple active TCI states. Based on the reception of this MAC CE, the UE deactivates the indicated TCI states and maintains the active TCI states other than the indicated TCI states.

[0512] Option 3

[0513] Alternatively, a new subset of TCI states may be activated, while previously activated TCI states remain active. Figure 21 In the example, the MAC CE indicates TCI states (TCI state IDs) 120, 201, and 222. Based on the reception of this MAC CE, the UE appends the indicated TCI state (associating the indicated TCI state with the appended code point) and maintains active TCI states other than the indicated TCI state.

[0514] <<Subset Instructions>>

[0515] The subset directive can also follow at least one of the following options.

[0516] Option 1

[0517] MAC CE indicates a subset of TCI states. For example, MAC CE can also indicate a subset of TCI states that includes the (i+1)th activated TCI state, or a subset of TCI states that includes the (i+1)th to (#i+L)th activated TCI states, or a subset of TCI states that includes the {i+1, j+1, k+1, ...}th activated TCI states.

[0518] Option 2

[0519] MAC CE indicates a subset of code points. For example, MAC CE can also indicate the (i+1)th code point i, or the (i+1)th to (#i+L)th code points i to i+L-1, or the {i+1, j+1, k+1, ...}th code point {i, j, k, ...}. It can also update a subset of TCI states mapped to the subset of indicated code points.

[0520] According to this implementation, even if the cell and TRP associations are changed, the UE can suppress overhead and be properly set / indicated TCI status.

[0521] <Supplement>

[0522] [Information notification to UE]

[0523] The notification of any information from the network (NW) (e.g., the base station (BS)) to the UE in the above-described embodiments (in other words, the reception of any information from the BS in the UE) 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 a combination thereof.

[0524] In the case of the aforementioned notification being made via MAC CE, the MAC CE can also be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not specified in the existing standard.

[0525] In the case of notification via DCI, the notification may 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.

[0526] Furthermore, the notification of any information to the UE in the above embodiments can also be performed periodically, semi-persistently, or non-periodically.

[0527] [Notification from UE]

[0528] The notification of any information from the UE (for the NW) in the above embodiments (in other words, the transmission / reporting of any information from the UE for 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 a combination thereof.

[0529] In the case of notification via MAC CE, the MAC CE can also be identified by including a new LCID, which is not specified in the existing standard, in the MAC subheader.

[0530] When the above notification is sent via UCI, PUCCH or PUSCH can also be used.

[0531] Furthermore, the notification of any information from the UE in the above embodiments can also be performed periodically, semi-persistently, or non-periodically.

[0532] [Regarding the application of each implementation method]

[0533] 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 notified to the UE / BS using higher-layer signaling / physical layer signaling.

[0534] The specific conditions mentioned above can also represent at least one of the following:

[0535] ◇Activation of at least one of the above-described embodiments.

[0536] At least one of the above-described implementation methods may also be applied only to UEs that have reported a specific UE capability or UEs that support that specific UE capability.

[0537] This specific UE capability can also represent at least one of the following:

[0538] ◇Supports specific processing / operation / control / information related to at least one of the above embodiments;

[0539] ◇UE supports cellless operation;

[0540] ◇UE supports single TRP / subcell transmission in a cell-free environment (single TRP transmission);

[0541] ◇UE supports joint transmission of multiple TRPs / subcells based on a single DCI in cellless environments (joint transmission of multiple TRPs based on a single DCI).

[0542] ◇UE supports joint transmission of multiple TRPs / subcells based on multiple DCI in cellless environments (joint transmission of multiple TRPs based on multiple DCI).

[0543] Furthermore, the aforementioned specific UE capabilities can be capabilities that are applied across the entire frequency (commonly regardless of frequency), capabilities that are applied to each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities that are applied to each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities that are applied to each subcarrier spacing (SCS), or capabilities that are applied to each feature set (FS) or feature set per component-carrier (FSPC).

[0544] Furthermore, the aforementioned specific UE capabilities can be either capabilities that are applied across the entire duplex mode (commonly regardless of the duplex mode) or capabilities that are specific to each duplex mode (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

[0545] 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:

[0546] ◇ indicates information indicating whether the operation of the above-described implementation method is activated / deactivated;

[0547] ◇ RRC parameters for a specific version (e.g., Rel.18 / 19). These RRC parameters can also have names that assign "r18" or "r19" to existing RRC parameters.

[0548] Even if at least one of the aforementioned specific UE capabilities is not supported, or if the aforementioned specific information is not set, the UE may, for example, apply the operation of Rel.15 / 16.

[0549] (Postscript)

[0550] With respect to one embodiment of this disclosure, the following invention is noted.

[0551] [Postscript 1]

[0552] A terminal having:

[0553] The receiving unit receives one or more commands indicating the states of multiple transmission configuration indicator (TCI) states, and receives downlink control information indicating one of the multiple TCI states; and

[0554] The control unit controls the receiving or transmitting using the one TCI state.

[0555] The multiple TCI states are associated with multiple cell identifiers.

[0556] [Postscript 2]

[0557] The terminal as described in Appendix 1, wherein,

[0558] The one or more commands are a single command representing the multiple TCI states.

[0559] [Postscript 3]

[0560] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0561] The one or more commands are multiple commands that are associated with the multiple cell identifiers respectively.

[0562] [Postscript 4]

[0563] The terminal as described in any one of Annexes 1 to 3, wherein,

[0564] The receiving unit receives multiple lists corresponding to the multiple cell identifiers, and the multiple TCI states are included in the multiple lists.

[0565] (Postscript)

[0566] With respect to one embodiment of this disclosure, the following invention is noted.

[0567] [Postscript 1]

[0568] A terminal having:

[0569] The receiving unit receives one or more commands indicating the states of multiple transmission configuration indicator (TCI) states, and receives one downlink control message indicating two or more of the multiple TCI states; and

[0570] The control unit controls the reception or transmission using the two or more TCI states.

[0571] The multiple TCI states are associated with multiple cell identifiers.

[0572] [Postscript 2]

[0573] The terminal as described in Appendix 1, wherein,

[0574] The one or more commands are a single command representing the multiple TCI states.

[0575] [Postscript 3]

[0576] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0577] The one or more commands are multiple commands that are associated with the multiple cell identifiers respectively.

[0578] [Postscript 4]

[0579] The terminal as described in any one of Annexes 1 to 3, wherein,

[0580] The receiving unit receives multiple lists corresponding to the multiple cell identifiers, and the multiple TCI states are included in the multiple lists.

[0581] (Postscript)

[0582] With respect to one embodiment of this disclosure, the following invention is noted.

[0583] [Postscript 1]

[0584] A terminal having:

[0585] The receiving unit receives multiple commands representing the status of multiple transmission configuration indicator (TCI) states associated with multiple groups of resource sets used for monitoring the downlink control channel, and receives at least one downlink control message in each of the multiple groups; and

[0586] The control unit controls the reception or transmission using one or more TCI states from among the plurality of TCI states, wherein the one or more TCI states are indicated by one or more downlink control information.

[0587] The multiple groups are associated with multiple cell identifiers.

[0588] [Postscript 2]

[0589] The terminal as described in Appendix 1, wherein,

[0590] One of the multiple groups is associated with one of the multiple cell identifiers.

[0591] The more than one downlink control information is a single downlink control information indicating a TCI state.

[0592] [Postscript 3]

[0593] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0594] One of the multiple groups is associated with two or more of the multiple cell identifiers.

[0595] The more than one downlink control information is a single downlink control information indicating a TCI state.

[0596] [Postscript 4]

[0597] The terminal as described in any one of Annexes 1 to 3, wherein,

[0598] One of the multiple groups is associated with two or more of the multiple cell identifiers.

[0599] The more than one downlink control information refers to more than two downlink control information that respectively indicate more than two TCI states.

[0600] (Wireless communication system)

[0601] The structure of a wireless communication system according to one embodiment of this disclosure will be described below. 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.

[0602] Figure 22 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one implementation. The wireless communication system 1 (which may also be 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 (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0603] 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.

[0604] 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.

[0605] 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))).

[0606] 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. User terminals 20 may also be located within at least one cell. The configuration and number of each cell and 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.

[0607] User terminal 20 may also be connected 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).

[0608] 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 and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0609] In addition, in each CC, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) for communication.

[0610] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), X2 interface, etc.) 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.

[0611] 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.

[0612] 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, a single network node may provide multiple functions. Furthermore, communication with external networks (e.g., the Internet) can also be conducted via the DN.

[0613] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0614] 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.

[0615] Wireless access methods can also be referred to as waveforms. In addition, in wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be applied in the wireless access methods of UL and DL.

[0616] As a downlink channel, the wireless communication system 1 can also use downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), downlink control channels (Physical Downlink Control Channel (PDCCH)) and so on, which are shared among the user terminals 20.

[0617] In addition, as uplink channels, the wireless communication system 1 may also use uplink shared channels (Physical Uplink Shared Channel (PUSCH)), uplink control channels (Physical Uplink Control Channel (PUCCH)), random access channels (Physical Random Access Channel (PRACH)) and so on, which are shared by each user terminal 20.

[0618] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and high-level control information can also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) can be transmitted via PBCH.

[0619] 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.

[0620] Additionally, the DCI for scheduling PDSCH can also be called DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0621] 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.

[0622] A search space can also correspond to a PDCCH candidate that matches 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", and "CORESET setting" used in this disclosure can be used interchangeably.

[0623] Uplink control information (UCI) can also be transmitted via PUCCH, including at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0624] In addition, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, various channels may be described without the word "physical".

[0625] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, as DL-RS, 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) can also be transmitted.

[0626] Synchronization signals can be, for example, at least one of the primary synchronization signal (PSS) and the 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.

[0627] 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).

[0628] (Base station)

[0629] Figure 23This 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.

[0630] 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 possess other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0631] 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.

[0632] 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.

[0633] 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 may be composed of a transmitter / receiver, RF circuitry, baseband circuitry, filters, phase shifters, measurement circuitry, transmitting / receiving circuitry, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0634] 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.

[0635] 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.

[0636] 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.

[0637] 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.

[0638] 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.

[0639] 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, 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.

[0640] For baseband signals, the transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc., to the wireless frequency band, and transmit the wireless frequency band signals through the transmitting and receiving antenna 130.

[0641] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, demodulate baseband signals, etc., for signals in the wireless frequency band that are received by the transmitting and receiving antenna 130.

[0642] For the acquired baseband signal, the transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing such as 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.

[0643] 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.

[0644] 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.

[0645] 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 the transmitting and receiving unit 120, the transmitting and receiving antenna 130 and the transmission path interface 140.

[0646] The transmit / receive unit 120 may also send one or more commands representing multiple transmission configuration indicator (TCI) states, and send downlink control information indicating one of the multiple TCI states. The control unit 110 may also control reception or transmission using the one TCI state. The multiple TCI states may also be associated with multiple cell identifiers.

[0647] The transmit / receive unit 120 may also send one or more commands indicating the states of multiple transmission configuration indicator (TCI) states, and send one downlink control message indicating two or more of the multiple TCI states. The control unit 110 may also control the reception or transmission using the two or more TCI states. The multiple TCI states may also be associated with multiple cell identifiers.

[0648] The transmit / receive unit 120 may also transmit multiple commands representing multiple transmission configuration indicator (TCI) states associated with multiple groups of resource sets used for monitoring downlink control channels, and transmit more than one downlink control message in more than one of the multiple groups. The control unit 110 may also control the reception or transmission using more than one of the multiple TCI states, wherein the more than one TCI state is indicated by the more than one downlink control message. The multiple groups may also be associated with multiple cell identifiers.

[0649] (User terminal)

[0650] Figure 24 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.

[0651] 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 possess other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0652] 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 art to which this disclosure pertains.

[0653] 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.

[0654] 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.

[0655] 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.

[0656] 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.

[0657] 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.

[0658] 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.

[0659] 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.

[0660] 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.

[0661] Furthermore, whether or not to apply DFT processing can be based on the transform precoding settings. For a certain channel (e.g., PUSCH), if transform precoding is activated, 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.

[0662] 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.

[0663] 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.

[0664] 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.

[0665] 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.

[0666] 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, NZPCSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., can also be interchanged.

[0667] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230.

[0668] The transmit / receive unit 220 can also receive one or more commands representing multiple transmission configuration indicator (TCI) states, and receive downlink control information indicating one of the multiple TCI states. The control unit 210 can also control reception or transmission using the one TCI state (e.g., DL / UL transmission of a single TRP / subcell). The multiple TCI states can also be associated with multiple cell identifiers (e.g., identifiers corresponding to TRPs / subcells).

[0669] The one or more commands can also be a single command representing the multiple TCI states.

[0670] The one or more commands can also be multiple commands that are associated with the multiple cell identifiers respectively.

[0671] The transmitting and receiving unit 220 receives multiple lists corresponding to the multiple cell identifiers, and the multiple TCI states can also be included in the multiple lists.

[0672] The transmit / receive unit 220 can also receive one or more commands indicating the states of multiple transmission configuration indicator (TCI) states, and receive one downlink control message indicating two or more of the multiple TCI states. The control unit 210 can also control the reception or transmission using the two or more TCI states (e.g., joint transmission of DL / UL based on multiple TRPs / subcells using a single DCI). The multiple TCI states can also be associated with multiple cell identifiers.

[0673] The one or more commands can also be a single command representing the multiple TCI states.

[0674] The one or more commands can also be multiple commands that are associated with the multiple cell identifiers respectively.

[0675] The transmitting and receiving unit 220 can also receive multiple lists corresponding to the multiple cell identifiers, and the multiple TCI states can also be included in the multiple lists.

[0676] The transmit / receive unit 220 may also receive multiple commands representing multiple transmission configuration indicator (TCI) states associated with multiple groups (e.g., CORESET groups, CORESET pools) of resource sets (e.g., CORESETs) used for monitoring downlink control channels, and may receive more than one downlink control message in more than one of the multiple groups. The control unit 210 may also control the reception or transmission using more than one of the multiple TCI states (e.g., joint transmission of DL / UL of multiple TRPs / subcells based on multiple DCIs), wherein the more than one TCI state is indicated by the more than one downlink control message. The multiple groups may also be associated with multiple cell identifiers.

[0677] One of the multiple groups can also be associated with one of the multiple cell identifiers. The more than one downlink control information can also be a single downlink control information indicating a TCI state.

[0678] One of the multiple groups can also be associated with two or more cell identifiers from the multiple cell identifiers. The one or more downlink control messages can also be a single downlink control message indicating a TCI state.

[0679] One of the multiple groups can also be associated with two or more cell identifiers from the multiple cell identifiers. The one or more downlink control messages can also be two or more downlink control messages that respectively indicate two or more TCI states.

[0680] (Hardware structure)

[0681] 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.

[0682] 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. As described above, the implementation method is not particularly limited.

[0683] 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 25 This diagram illustrates 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, a bus 1007, etc.

[0684] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. 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.

[0685] 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.

[0686] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of reading out and writing data in the memory 1002 and the storage device 1003.

[0687] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be configured as a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least some of the control unit 110 (210), the transmit / receive unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0688] 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.

[0689] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), 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 one embodiment of this disclosure.

[0690] Storage device 1003 may also be a computer-readable recording medium, such as at least one of a flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), stripe, database, server, or other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0691] 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 transmitting and receiving unit 120 (220) and transmitting and receiving antenna 130 (230) can also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) can also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0692] 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).

[0693] 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.

[0694] 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), and 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.

[0695] (Variation example)

[0696] 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 used interchangeably. 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.

[0697] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes 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).

[0698] Here, the parameter set can also refer to 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.

[0699] 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.

[0700] 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.

[0701] 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 used in this disclosure can be used interchangeably.

[0702] 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 to say, at least one of the subframe and TTI can be a subframe in the 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 a time slot, mini-time slot, etc.

[0703] 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.

[0704] 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.

[0705] 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.

[0706] 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.

[0707] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1ms.

[0708] 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.

[0709] 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.

[0710] 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.

[0711] In addition, 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.

[0712] 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.

[0713] 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.

[0714] 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. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0715] 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.

[0716] 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.

[0717] 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.

[0718] 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.

[0719] 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.

[0720] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using management tables. 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.

[0721] 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.

[0722] 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).

[0723] 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).

[0724] 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).

[0725] Whether it is called software, firmware, middleware, microcode, hardware description language, or any other name, software should be broadly interpreted as instructions, instruction sets, code, code segments, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object, executable file, execution thread, process, function, etc.

[0726] 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.

[0727] 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).

[0728] 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”, “beam amplitude”, “beam angle”, “antenna”, “antenna element”, “panel”, “UE panel”, “transmitting entity”, and “receiving entity” are used interchangeably.

[0729] Furthermore, in this disclosure, antenna ports can be interchanged with antenna ports used for any signal / channel (e.g., DeModulation Reference Signal (DMRS) ports). In this disclosure, resources can also be interchanged with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Additionally, resources can also include time / frequency / symbol / 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.

[0730] 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.

[0731] 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.

[0732] 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.

[0733] 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.

[0734] 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.

[0735] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) can be interchanged. "Spatial relationship information (TCI state)" and "a set of spatial relationship information (TCI states)," or "one or more spatial relationship information," can also be interchanged. TCI state and TCI can also be interchanged. Spatial relationship information and spatial relationship can also be interchanged.

[0736] 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 terms such as macro cell, small cell, femtocell, and picocell are used to refer to base stations.

[0737] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, 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 ​​the base station providing communication services within that coverage area, as well as at least one of the base station subsystems.

[0738] In this disclosure, the information sent by the base station to the terminal and the control / operation instructed by the base station to the terminal based on that information can also be rewritten.

[0739] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0740] 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.

[0741] 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 a device mounted on a moving object, the moving object itself, etc.

[0742] 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, autonomous two-wheelers, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trailers, rickshaws, ships (bottles and other watercraft), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quadcopters, 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.

[0743] 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 may include a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an IoT (Internet of Things) device such as a sensor.

[0744] Figure 26 This figure illustrates 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 gear 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, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a gear shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0745] 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 handlebar) and to perform directional control on at least one of the front wheel 46 and the rear wheel 47 based on the operation of the steering wheel by the user.

[0746] 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 into the electronic control unit 49. The electronic control unit 49 can also be referred to as an electronic control unit (ECU).

[0747] The signals from various sensors 50-58 include current signals from current sensor 50 that detects the current of the motor, speed signals from front wheel 46 / rear wheel 47 obtained by speed sensor 51, air pressure signals from front wheel 46 / rear wheel 47 obtained by air pressure sensor 52, vehicle speed signals obtained by vehicle speed sensor 53, acceleration signals obtained by acceleration sensor 54, accelerator pedal 43 depress amount signals obtained by accelerator pedal sensor 55, brake pedal 44 depress amount signals obtained by brake pedal sensor 56, shift lever 45 operation signals obtained by shift lever sensor 57, and detection signals obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0748] The information service unit 59 comprises various devices such as a car 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.

[0749] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) or output devices that implement output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0750] 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 devices (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) mapping), 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 communication module 60 to realize driver assistance or autonomous driving functions.

[0751] The communication module 60 can communicate with the microprocessor 61 and the constituent elements of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) between the microprocessor 61 and the memory (ROM, RAM) 62, and various sensors 50-58 in the drive unit 41, steering control unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, electronic control unit 49, and the vehicle 40 via the communication port 63.

[0752] The communication module 60 is 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 between external devices via wireless communication. The communication module 60 can be located either inside or 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).

[0753] The communication module 60 can also wirelessly transmit to an external device at least one of the signals input to the electronic control unit 49 from the various sensors 50-58, information obtained based on those signals, and information based on input from an external source (user) obtained via the information service unit 59. 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 accept input. For example, the PUSCH transmitted by the communication module 60 can also contain information based on the aforementioned inputs.

[0754] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) sent from external devices and displays it to the information service unit 59 provided by the vehicle. The information service unit 59 can also be referred to as an information output unit (e.g., outputting 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)).

[0755] Furthermore, the communication module 60 stores various information received from external devices into a memory 62 that can be utilized by the microprocessor 61. 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, axle 48, and various sensors 50-58 of the vehicle 40 based on the information stored in the memory 62.

[0756] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to a structure where the 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 replaced with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be replaced with sidelink channel.

[0757] Similarly, the user terminal in this disclosure can also be replaced by 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.

[0758] In this disclosure, actions are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. Clearly, in a network containing one or more network nodes having a base station, various operations performed for communication with a terminal can 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.

[0759] The various methods / implementations described in this disclosure can be used individually, in combination, or switched as needed during execution. Furthermore, the processing procedures, 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, with respect to 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.

[0760] 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 (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 (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), 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 appropriate wireless communication methods, and next-generation systems extended, modified, established, or specified based on them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0761] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise specified. In other words, the word "based on" means both "based on only" and "based on at least".

[0762] 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, references to the first and second elements do not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0763] The term "determining" as used in this disclosure can encompass a wide variety of actions. 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.

[0764] 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.

[0765] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". In other words, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made. In this disclosure, "judgment (decision)" and the aforementioned operations can also be rewritten interchangeably.

[0766] Furthermore, in this disclosure, "determine / determining" can be interchanged with "assume / assuming," "expect / expecting," and "consider / considering." Additionally, in this disclosure, "not assuming to proceed..." and "assuming not to proceed..." can also be interchanged.

[0767] In this disclosure, "expect" and "be expected" can be rewritten interchangeably. For example, "expect(s)......" ("..." can also be expressed using a that clause, to infinitive, etc.) and "be expected......" can also be rewritten interchangeably. "does not expect......" and "be not expected......" can also be rewritten interchangeably. Furthermore, "An apparatus A is not expected......" and "Apparatus B other than apparatus A does not expect......" can also be rewritten interchangeably (for example, if apparatus A is a UE, apparatus B can also be a base station).

[0768] The term "maximum transmit power" as used in this disclosure can 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).

[0769] 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, “connected” can also be replaced with “access.”

[0770] In this disclosure, when two elements are connected, it is possible to use more than one wire, cable, printed electrical connection, etc., and to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region as several non-limiting and non-inclusive examples, so that they are "connected" or "combined" with each other.

[0771] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other". Additionally, this term can also mean "A and B are different from C respectively". Terms such as "separate" and "combined" can also be interpreted in the same way as "different".

[0772] 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.

[0773] 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.

[0774] In this disclosure, expressions such as "below," "less than," "above," "more," and "equal to" can be rewritten interchangeably. Furthermore, in this disclosure, words meaning "good," "bad," "large," "small," "high," "low," "fast," "slow," "wide," and "narrow," etc., are not limited to the positive, comparative, and superlative degrees, and can be rewritten interchangeably. Additionally, in this disclosure, words meaning "good," "bad," "large," "small," "high," "low," "fast," "slow," "wide," and "narrow," when used as expressions with the prefix "i" (where i is any integer), are not limited to the positive, comparative, and superlative degrees, and can be rewritten interchangeably (for example, "highest" and "i-th highest" can also be rewritten interchangeably).

[0775] In this disclosure, "of", "for", "regarding", "related to", "associated with", etc., can also be rewritten interchangeably.

[0776] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "in response to A", "based on A", "during / while A", "before A", "at the same time as / on A", "after A", "since A", and "until A" can be rewritten interchangeably. Furthermore, A and B can be appropriately replaced with nouns, gerunds, or ordinary sentences depending on the context. Additionally, the time difference between A and B can be approximately 0 (immediately following or immediately preceding). Moreover, a time offset can be applied to the time A occurs. For example, "A" can also be rewritten interchangeably with "before / after the time offset of A". The 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.

[0777] In this disclosure, timing, moment, time, time instance, arbitrary time unit (e.g., time slot, sub-time slot, symbol, subframe), period, occasion, resource, etc., can also be rewritten to each other.

[0778] 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.

Claims

1. A terminal, comprising: The receiving unit receives one or more commands representing multiple Transmission Setting Indicator states, i.e., multiple TCI states, and receives one downlink control message indicating two or more of the multiple TCI states; and The control unit controls the reception or transmission using the two or more TCI states. The multiple TCI states are associated with multiple cell identifiers.

2. The terminal as described in claim 1, wherein, The one or more commands are a single command representing the multiple TCI states.

3. The terminal as described in claim 1, wherein, The one or more commands are multiple commands that are associated with the multiple cell identifiers respectively.

4. The terminal as described in claim 1, wherein, The receiving unit receives multiple lists corresponding to the multiple cell identifiers, and the multiple TCI states are included in the multiple lists.

5. A wireless communication method for a terminal, comprising: The steps of receiving one or more commands representing multiple transmit setting indicator states, i.e. multiple TCI states; The steps of receiving a downlink control message indicating two or more TCI states among the plurality of TCI states; and The steps for controlling the reception or transmission using two or more TCI states. The multiple TCI states are associated with multiple cell identifiers.

6. A base station, comprising: The transmitting unit transmits one or more commands representing multiple transmission setting indicator states, i.e., multiple TCI states, and transmits one downlink control message indicating two or more of the multiple TCI states; and The control unit controls the reception or transmission using the two or more TCI states. The multiple TCI states are associated with multiple cell identifiers.

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