Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a reception unit that receives a list indicating a plurality of cells, and a control unit that applies, to the plurality of cells, a command indicating activation of at least one of a transmission control indication (TCI) state and a spatial relation, the command indicating one of the plurality of cells, the command being associated with a control resource set pool (CORESET pool).

Description

TECHNICAL FIELD

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

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further higher-speed data rates, lower delay, and so on (Non-Patent Literature 1). Further, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further larger capacity, higher density, and so on of LTE (3rd Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] A subsequent system of LTE (for example, also referred to as a 5th generation mobile communication system (5G), 5G (plus), a 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 onwards, and so on) is also being researched.

[0004] PRIOR ART DOCUMENTS

[0005] NON-PATENT LITERATURE

[0006] Non-Patent Literature 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

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In a future wireless communication system (for example, NR), it is being researched to update a transmission control indication (TCI) state or a spatial relation for a plurality of component carriers (CCs (cells)) at the same time.

[0009] However, it is not clear how the UE updates the TCI state or spatial relation for at least one transmission reception point (TRP). If the method of updating the TCI state or spatial relation is not clear, there is a concern that it leads to a reduction in throughput, a reduction in communication quality, and the like.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately update at least one of a TCI state and a spatial relation.

[0011] Means for solving the problem

[0012] A terminal according to an aspect of the present disclosure includes a reception unit that receives a list indicating a plurality of cells, and a control unit that applies a command indicating activation of at least one of a transmission control indication state (TCI state) and a spatial relation to the plurality of cells, the command indicating one of the plurality of cells, the command being associated with a control resource set pool (CORESET pool).

[0013] Effects of Invention

[0014] According to an aspect of the present disclosure, at least one of a TCI state and a spatial relation can be appropriately updated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a diagram illustrating an example of simultaneous beam update of a plurality of CCs.

[0016] Figure 2 is a diagram illustrating an example of update of a TCI state for PDCCH.

[0017] Figure 3 is a diagram illustrating an example of an outline structure of a wireless communication system according to an embodiment.

[0018] Figure 4 is a diagram illustrating an example of a structure of a base station according to an embodiment.

[0019] Figure 5 is a diagram illustrating an example of a structure of a user terminal according to an embodiment.

[0020] Figure 6 is a diagram illustrating an example of a hardware structure of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0021] (TCI, Spatial Relation, QCL)

[0022] In NR, it is under study to control at least one of a signal and a channel (expressed as a signal / channel) in a reception process (for example, at least one of reception, demapping, demodulation, decoding) in a UE, a transmission process (for example, at least one of transmission, mapping, precoding, modulation, coding) based on a transmission configuration indication state (TCI state) being applied.

[0023] A TCI state can also indicate a state applied to a signal / channel of a downlink. A state equivalent to a TCI state applied to a signal / channel of an uplink can also be expressed as a spatial relation.

[0024] A TCI state is information related to quasi co-location (QCL) of a signal / channel, and can also be referred to as a spatial reception parameter, spatial relation information, etc. A TCI state can also be configured to a UE per channel or per signal.

[0025] QCL is an indicator indicating a statistical property of a signal / channel. For example, it can also mean that, in a case where a certain signal / channel is in a QCL relationship with other signal / channels, it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial parameter (for example, a spatial Rx parameter) is the same (is QCL with respect to at least one of them) among the different plurality of signal / channels.

[0026] In addition, a spatial reception parameter can also correspond to a reception beam (for example, a reception analog beam) of a UE, and a beam can also be determined based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure can also be replaced with sQCL (spatial QCL).

[0027] With respect to QCL, a plurality of types (QCL types) can also be specified. For example, four QCL types A-D can also be set, in which different parameters (or sets of parameters) can be assumed to be the same, and with respect to the parameters (which can also be referred to as QCL parameters), the following is indicated:

[0028] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0029] • QCL Type B (QCL-B): Doppler shift and Doppler spread,

[0030] • QCL Type C (QCL-C): Doppler shift and average delay,

[0031] • QCL Type D (QCL-D): Spatial receive parameter.

[0032] The UE can also assume that a certain control resource set (CORESET), channel, or reference signal is in a certain QCL relationship (e.g., QCL Type D) with another CORESET, channel, or reference signal. This can also be referred to as a QCL assumption.

[0033] The UE can also determine at least one of a transmission beam (Tx beam) and a reception beam (Rx beam) of a signal / channel based on a TCI state or a QCL assumption of the signal / channel.

[0034] The TCI state can also be information related to a QCL between a channel (in other words, a reference signal (RS) for the channel) that is a target and another signal (e.g., another RS). The TCI state can also be configured (indicated) through higher layer signaling, physical layer signaling, or a combination thereof.

[0035] The physical layer signaling can also be downlink control information (Downlink Control Information (DCI)).

[0036] The channel for which the TCI state or spatial relation is configured (indicated) can also be at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0037] Further, the RS in the QCL relationship with the channel can be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a reference signal for measurement (sounding reference signal (SRS)), a CSI-RS for tracking (also referred to as a tracking reference signal (TRS)), and a reference signal for QCL detection (also referred to as a QRS).

[0038] The SSB is a signal block including at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (physical broadcast channel (PBCH)). The SSB can also be referred to as an SS / PBCH block.

[0039] The RS of the QCL type X of the TCI state can also mean a RS in a QCL type X relationship with (the DMRS of) a certain channel / signal, which can also be referred to as a QCL source of the QCL type X of the TCI state.

[0040] (Multi-TRP)

[0041] In NR, it is being studied that one or more transmission reception points (transmission / reception points (TRPs)) (multi-TRP (MTRP)) use one or more panels (multi-panel) to perform DL transmission to a UE. Further, it is being studied that a UE uses one or more panels to perform UL transmission to one or more TRPs.

[0042] In addition, the plurality of TRPs can correspond to the same cell identifier (cell Identifier (ID)) or different cell IDs. The cell ID can be a physical cell ID or a virtual cell ID.

[0043] The multiple TRPs (e.g., TRP #1, #2) can also be connected through ideal / non-ideal backhaul and exchange information, data, and the like. Respective different code words (Code Word (CW)) and different layers can also be transmitted from the respective TRPs of the multiple TRPs. As one way of multiple TRP transmission, Non-Coherent Joint Transmission (NCJT) can also be used.

[0044] In NCJT, for example, TRP #1 modulates and maps a first code word and performs layer mapping, and transmits a first PDSCH using a first precoding for a first number of layers (e.g., two layers). In addition, TRP #2 modulates and maps a second code word and performs layer mapping, and transmits a second PDSCH using a second precoding for a second number of layers (e.g., two layers).

[0045] In addition, the multiple PDSCHs (multi-PDSCH) by NCJT can also be defined as partially or completely overlapping in at least one of the time domain and the frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP can overlap.

[0046] It can also be assumed that the first PDSCH and the second PDSCH are not in a Quasi-Co-Location (QCL) relationship (not quasi-co-located). The reception of the multi-PDSCH can also be replaced with the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0047] The multiple PDSCHs (which can also be referred to as multi-PDSCH) from the multiple TRPs can also be scheduled using one DCI (single DCI, single PDCCH) (single master mode, single-DCI based multi-TRP). The multiple PDSCHs from the multiple TRPs can also be scheduled using multiple DCIs (multi-DCI, multiple PDCCH) respectively (multi-master mode, multi-DCI based multi-TRP).

[0048] According to such a multiple TRP scenario, more flexible transmission control using a good quality channel can be performed.

[0049] To support intra-cell (with the same cell ID) and inter-cell (with different cell ID) multi-TRP transmission based on multiple PDCCHs, in RRC configuration information for linking multiple pairs of PDCCH and PDSCH, one control resource set (CORESET) within PDCCH configuration (PDCCH-Config) can also correspond to one TRP.

[0050] (Simultaneous beam update for multiple CCs)

[0051] In Rel. 16, one MAC CE can update beam indices (TCI states) for multiple CCs.

[0052] A UE can be configured by RRC with up to two applicable CC lists (e.g., applicable-CC-list). In case two applicable CC lists are configured, the two applicable CC lists can also correspond to in-band CA in FR1 and in-band CA in FR2, respectively.

[0053] Activation MAC CE for TCI state of PDCCH activates TCI state associated with the same CORESET ID on all BWPs / CCs within the applicable CC list.

[0054] Activation MAC CE for TCI state of PDSCH activates TCI state on all BWPs / CCs within the applicable CC list.

[0055] Activation MAC CE for spatial relation of A-SRS / SP-SRS activates spatial relation associated with the same SRS resource ID on all BWPs / CCs within the applicable CC list.

[0056] In the example of Figure 1 , a UE is configured with an applicable CC list indicating CC#0, #1, #2, #3, and a list of 64 TCI states for CORESET or PDSCH per CC. In case one TCI state for CC#0 is activated by MAC CE, the corresponding TCI state is activated in CC#1, #2, #3.

[0057] It is under study that such simultaneous beam update can only apply to single-TRP scenario.

[0058] For PDSCH, a UE can also be based on the following procedure A.

[0059] [Procedure A]

[0060] The UE receives an activation command for mapping at most 8 TCI states to a codepoint of a DCI field (TCI field) within one CC / DL BWP or one set of CCs / BWPs. In case one set of TCI state IDs is activated for one set of CCs / DL BWPs, thereby, the applicable list of CCs is decided by the CCs indicated within the activation command, the same set of TCI states is applied for all DL BWPs within the indicated CCs. Only in case the UE is not provided with different values of CORESET pool index (CORESETPoolIndex) within ControlResourceSet information element and is not provided with at least one TCI codepoint mapped to two TCI states, one set of TCI state IDs can be activated for one set of CCs / DL BWPs.

[0061] For PDCCH, the UE can also be based on the following procedure B.

[0062] [Procedure B]

[0063] If the UE is provided with at most two lists of cells for simultaneous TCI state activation based on at least one of simultaneousTCI-UpdateList-r16 and simultaneousTCI-UpdateListSecond-r16 by simultaneousTCI-CellList, the UE applies the antenna port quasi co-location (QCL) provided by the TCI state with the same activated TCI state ID value for CORESET with index p within the DL BWP of all configured cells within the one list decided according to the serving cell index provided by the MAC CE command. Only in case the UE is not provided with different values of CORESET pool index (CORESETPoolIndex) within ControlResourceSet information element and is not provided with at least one TCI codepoint mapped to two TCI states, the simultaneousTCI-CellList can be provided for simultaneous TCI state activation.

[0064] For semi-persistent (SP) / aperiodic (AP)-SRS, the UE can also be based on the following procedure C.

[0065] [Procedure C]

[0066] In case that the spatial relation information (spatialRelationInfo) for a set of CCs / BWPs for SP or AP-SRS resources configured by SRS resource information element (higher layer parameter SRS-Resource) is activated / updated by MAC CE, by which the applicable list of CCs is indicated by the simultaneous spatial update list (higher layer parameter simultaneousSpatial-UpdateList-r16 or simultaneousSpatial-UpdateListSecond-r16), the spatial relation information is applied for SP or AP-SRS resources with the same SRS resource ID in all BWPs within the indicated CCs. The spatial relation information for a set of CCs / BWPs for SP or AP-SRS resources configured by SRS resource information element (higher layer parameter SRS-Resource) is activated / updated by MAC CE only in case that the UE is not provided with different values of CORESET pool index (CORESETPoolIndex) within the ControlResourceSet information element and is not provided with at least one TCI codepoint mapped to two TCI states.

[0067] The simultaneous TCI cell list (simultaneousTCI-CellList), at least one of the simultaneous TCI update list (simultaneousTCI-UpdateList-r16 and simultaneousTCI-UpdateListSecond-r16) is a list of serving cells that can be simultaneously updated TCI relation using MAC CE. The simultaneousTCI-UpdateList-r16 and the simultaneousTCI-UpdateListSecond-r16 do not contain the same serving cell.

[0068] The simultaneous spatial update list (at least one of the higher layer parameters simultaneousSpatial-UpdateList-r16 and simultaneousSpatial-UpdateListSecond-r16) is a list of serving cells that can be simultaneously updated spatial relation using MAC CE. The simultaneousSpatial-UpdateList-r16 and the simultaneousSpatial-UpdateListSecond-r16 do not contain the same serving cell.

[0069] Here, the simultaneous TCI update list, the simultaneous spatial update list are configured by RRC, the CORESET pool index of the CORESET is configured by RRC, the TCI codepoint mapped to the TCI state is indicated by MAC CE.

[0070] In Rel. 15, the TCI state activation / deactivation MAC CE for UE-specific PDSCH (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) can activate one TCI state per TCI codepoint.

[0071] In Rel. 16, the extended (enhanced) TCI state activation / deactivation MAC CE for UE-specific PDSCH can activate one or two TCI states per TCI codepoint. This MAC CE is mainly for single-DCI, but can also be used for single-TRP or multi-TRP based on multi-DCI if at most one TCI state is activated for any of the TCI codepoints.

[0072] This MAC CE contains CORESET pool index (CORESET pool ID), serving cell ID, BWP ID and activation / deactivation status of each TCI state ID. The field of TCI state IDi indicates the activation (set to 1) case, TCI state IDi is activated, mapped to the codepoint of the TCI field of DCI. If the serving cell indicated by the MAC CE is configured as part of the simultaneous TCI update list, the MAC CE is applied to the serving cell configured within the simultaneous TCI update list.

[0073] The TCI state indication MAC CE for UE-specific PDCCH (TCI State Indication for UE-specific PDCCH MAC CE) contains serving cell ID, CORESET ID and TCI state ID. The TCI state ID indicates the TCI state that can be applied in the CORESET identified by the CORESET ID. If the serving cell indicated by the MAC CE is configured as part of the simultaneous TCI update list, the MAC CE is applied to the serving cell configured within the simultaneous TCI update list.

[0074] In single-TRP, the TCI state of PDCCH has one activated TCI state. The TCI state of PDSCH has up to 8 activated TCI states (activated by MAC CE and mapped to the codepoint of DCI). Each DCI codepoint (indicated by the TCI field within the DCI) corresponds to one activated TCI state.

[0075] In single-DCI based multi-TRP, the TCI state of PDCCH has one activated TCI state. The TCI state of PDSCH has up to 8 activated TCI states (activated by MAC CE and mapped to the codepoint of DCI). Each DCI codepoint (indicated by the TCI field within the DCI) corresponds to one or two activated TCI states.

[0076] In multi-DCI based multi-TRP, the TCI state of PDCCH has one activated TCI state. The CORESET pool index is set per CORESET. For each TRP, the TCI state of PDSCH has up to 8 activated TCI states (activated by MAC CE and mapped to the codepoint of DCI). Each DCI codepoint (indicated by the TCI field within the DCI) corresponds to one activated TCI state.

[0077] However, simultaneous TCI state update across multiple CCs for at least one TRP is not clear. If the UE operation is not clear, there is a concern that it leads to an increase in overhead, a decrease in throughput, a decrease in communication quality, and the like due to the inability to perform simultaneous TCI state update across multiple CCs for multi-TRP and the like.

[0078] Therefore, the inventors of the present disclosure conceived of a method of updating at least one of a TCI state and a spatial relation.

[0079] Hereinafter, embodiments related to the present disclosure are described in detail with reference to the accompanying drawings. The wireless communication method related to each embodiment can be applied individually or in combination.

[0080] In the present disclosure, "A / B", "at least one of A and B" can be replaced with each other. In the present disclosure, a cell, a CC, a carrier, a BWP, a DL BWP, a UL BWP, an activated DL BWP, an activated UL BWP, a band can be replaced with each other. In the present disclosure, an index, an ID, an indicator, a resource ID can be replaced with each other. In the present disclosure, an RRC parameter, a higher layer parameter, an RRC information element (IE), an RRC message can be replaced with each other.

[0081] In the present disclosure, activate, update, indicate, enable, specify can also be replaced with each other.

[0082] In the present disclosure, higher layer signaling can be, for example, any one of or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0083] MAC signaling can be, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (PDU), and the like. Broadcast information can be, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), and the like.

[0084] In the present disclosure, beam, TCI state, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, UE reception beam, DL reception beam, DL precoding, DL precoder, DL-RS, QCL Type-D of TCI state, RS of QCL Type-D of TCI state, RS of QCL Type-D of TCI state or QCL assumption, RS of QCL Type-A of TCI state or QCL assumption, spatial relation, spatial domain transmission filter, UE spatial domain transmission filter, UE transmission beam, UL transmission beam, UL precoding, UL precoder can also be replaced with each other. In the present disclosure, QCL Type-X RS, DL-RS associated with QCL Type-X, DL-RS with QCL Type-X, source of DL-RS, SSB, CSI-RS can also be replaced with each other.

[0085] In the present disclosure, a panel, an uplink (UL) transmission entity, a TRP, a spatial relation, a control resource set (CORESET), a PDSCH, a codeword, a base station, an antenna port of a certain signal (e.g., a DeModulation Reference Signal (DMRS) port), a group of antenna ports of a certain signal (e.g., a DMRS port group), a group for multiplexing (e.g., a Code Division Multiplexing (CDM) group, a reference signal group, a CORESET group), a CORESET pool, a CW, a redundancy version (RV), a layer (MIMO layer, transmission layer, spatial layer) can also be replaced with each other. Also, a panel Identifier (ID) and a panel can also be replaced with each other. In the present disclosure, a TRP ID and a TRP can also be replaced with each other.

[0086] In the present disclosure, a UE configured with multiple TRPs can also determine at least one of a TRP corresponding to a DCI, a TRP corresponding to a PDSCH or an UL transmission (PUCCH, PUSCH, SRS, etc.) scheduled by the DCI, etc., based on at least one of the following.

[0087] • a value of a specific field (e.g., a field specifying a TRP, an antenna port field, a PRI) included in the DCI.

[0088] • a DMRS (e.g., a sequence, a resource, a CDM group, a DMRS port, a DMRS port group, an antenna port group, etc. of the DMRS) corresponding to a scheduled PDSCH / PUSCH.

[0089] • a DMRS (e.g., a sequence, a resource, a CDM group, a DMRS port, a DMRS port group, etc. of the DMRS) corresponding to a PDCCH in which the DCI is transmitted.

[0090] • a CORESET (e.g., a CORESET pool ID of the CORESET, an ID of the CORESET, a scrambling ID (which can also be replaced with a sequence ID), a resource, etc.) in which the DCI is received.

[0091] • an RS (an RS related group, etc.) used for a TCI state, a QCL assumption, spatial relation information, etc.

[0092] In the disclosure, the single PDCCH (DCI) can also be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)). In addition, the multiple PDCCH (DCI) can also be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0093] In the disclosure, the single PDCCH can also be conceived to be supported in the case of using an ideal backhaul with respect to multiple TRPs. The multiple PDCCH can also be conceived to be supported in the case of using a non-ideal backhaul between multiple TRPs.

[0094] In addition, the ideal backhaul can also be referred to as a DMRS port group type 1, a reference signal association group type 1, an antenna port group type 1, a CORESET pool type 1, etc. The non-ideal backhaul can also be referred to as a DMRS port group type 2, a reference signal association group type 2, an antenna port group type 2, a CORESET pool type 2, etc. The names are not limited to these.

[0095] In the disclosure, the multiple TRP, the multiple TRP system, the multiple TRP transmission, the multiple PDSCH can be replaced with each other. In the disclosure, the single DCI, the single PDCCH, the multiple TRP based on the single DCI, the two TCI states on at least one TCI codepoint activated can be replaced with each other.

[0096] In the disclosure, the single TRP can also be replaced with a case in which, in any one of the indicated CCs (CCs), the UE is not provided with different multiple values of a CORESET pool index (CORESETPoolIndex) within a CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint mapped to two TCI states.

[0097] In the disclosure, the multiple TRP based on the single DCI can also be replaced with a case in which, in any one of the indicated CCs (CCs), the UE is provided with different multiple values of a CORESET pool index (CORESETPoolIndex) within a CORESET information element (ControlResourceSet) and is provided with at least one TCI codepoint mapped to two TCI states.

[0098] In the present disclosure, the multi-DCI based multi-TRP can also be replaced with that the UE is provided different multiple values of CORESET pool index (CORESETPoolIndex) within a CORESET information element (ControlResourceSet) in any of the indicated CCs (CCs), and is not provided at least one TCI codepoint mapped to two TCI states.

[0099] In the present disclosure, the TCI codepoint, the DCI codepoint, the codepoint of the TCI field can also be replaced with each other. In the present disclosure, the TCI field, the DCI field "transmission configuration indication" can also be replaced with each other.

[0100] In the present disclosure, the applicable list, the simultaneous TCI update list / second simultaneous TCI update list, simultaneousTCI-UpdateList-r16 / simultaneousTCI-UpdateListSecond-r16, the simultaneous TCI cell list, simultaneousTCI-CellList, the simultaneous spatial update list / second simultaneous spatial update list, simultaneousSpatial-UpdateList-r16 / simultaneousSpatial-UpdateListSecond-r16, simultaneousSpatial-UpdatedList-r16 / simultaneousSpatial-UpdatedListSecond-r16, the configured CC, the configured list, the BWP / CC within the configured list, all BWP / CC within the configured list, the CC indicated by the activation command, the indicated CC, the CC in which the MAC CE is received, the information indicating multiple cells for updating at least one of the TCI state and the spatial relation can also be replaced with each other.

[0101] In the present disclosure, the MAC CE, the activation command can also be replaced with each other.

[0102] (Wireless communication method)

[0103] <First embodiment>

[0104] In multi-TRP (single-DCI based multi-TRP / multi-DCI based multi-TRP), the UE can also perform (may also support, can also be capable of performing) simultaneous TCI state update across multiple BWP / CCs within a set list for PDCCH / PDSCH. If the serving cell indicated by the MAC CE is set as part of the simultaneous TCI update list, the MAC CE can also be applied to the serving cell set within the simultaneous TCI update list (all BWP / CCs within the list).

[0105] In multi-TRP (single-DCI based multi-TRP / multi-DCI based multi-TRP), the UE can also perform (may also support, can also be capable of performing) simultaneous spatial relation update across multiple BWP / CCs within a set list for SRS / PUCCH. If the serving cell indicated by the MAC CE is set as part of the simultaneous spatial update list, the MAC CE can also be applied to the serving cell set within the simultaneous spatial update list (all BWP / CCs within the list).

[0106] According to the above first embodiment, even in the case of using multi-TRP, it is possible to simultaneously update the TCI state or spatial relation across multiple BWP / CCs.

[0107] <Second Embodiment>

[0108] TCI state of PDCCH

[0109] [Single-DCI based multi-TRP / single-TRP]

[0110] One MAC CE can also update the TCI state of the same CORESET ID across all BWP / CCs within a set list.

[0111] Figure 2 is a diagram showing an example of updating of the TCI state for PDCCH. In this example, in the case where the cell indicated by the MAC CE is included in the list (for example, simultaneousTCI-UpdateList-r16 / simultaneousTCI-UpdateListSecond-r16) (S110: Y), the UE updates the TCI state of the same CORESET ID indicated by the MAC CE across all BWP / CCs within the set list (S120). In the case where the cell indicated by the MAC CE is not included in the list (S110: N), the UE updates the TCI state of the CORESET ID indicated by the MAC CE for the cell indicated by the MAC CE (S130).

[0112] [Multi-DCI based multi-TRP]

[0113] One MAC CE can also update the TCI state of the same CORESET ID across all BWP / CC within the configured list.

[0114] One MAC CE can also update the TCI state of the CORESET associated with the same CORESET pool index across all BWP / CC within the configured list.

[0115] A MAC CE (UE-specific PDCCH TCI state indication MAC CE) can also contain a CORESET pool index. The UE can also update the CORESET associated with the CORESET pool index. The UE can also update the TCI state of the CORESET associated with the CORESET pool index that is associated with the CORESET indicated by the MAC CE.

[0116] [TCI state for PDSCH]

[0117] [Single-DCI based multi-TRP]

[0118] One MAC CE can also update the active TCI state across all BWP / CC within the configured list. The active TCI state can also be up to 8 active TCI states. Each DCI codepoint can also correspond to one active TCI state.

[0119] [Multi-DCI based multi-TRP]

[0120] One MAC CE can also update the active TCI state across all BWP / CC within the configured list. The active TCI state can also be up to 8 active TCI states. Each DCI codepoint can also correspond to one or two active TCI states.

[0121] Each TRP can also be indicated with different TCI states. The same set of up to 8 active TCI states can also be avoided from being activated for all TRPs.

[0122] The UE can also assume that the DCI field of TCI state indicates different TCI states for PDSCH for each TRP. Different values of the DCI field of TCI state can also be indicated for each PDCCH associated with each CORESET pool index. The operation can also depend on the network implementation.

[0123] For multi-DCI based multi-TRP, simultaneous update of TCI state across multiple BWP / CCs can also be supported. It can also be that the update by MAC CE of TCI state associated with the same CORESET pool index can be made. One MAC CE can also update the TCI state of PDSCH scheduled by PDCCH associated with CORESET pool index (CORESET pool ID) across all BWP / CCs within the configured list. This operation can also be realized by specification change.

[0124] According to the above second embodiment, even in the case of using multi-TRP, it is possible to simultaneously update TCI state across multiple BWP / CCs.

[0125] <Third Embodiment>

[0126] In multi-TRP, in the case where additional UE implementation (function) is required in order to enable simultaneous TCI state update across multiple BWP / CCs, UE capability (capability information) can also be defined. The UE can also report the UE capability.

[0127] A UE capability indicating support of simultaneous TCI state update across multiple BWP / CCs for multi-TRP can also be defined.

[0128] A UE capability indicating support of simultaneous TCI state update across multiple BWP / CCs for multi-TRP based on single DCI can also be defined. A UE capability indicating support of simultaneous TCI state update across multiple BWP / CCs for multi-TRP based on multi-DCI can also be defined.

[0129] The first embodiment / second embodiment can also be applicable to a UE reporting the corresponding UE capability.

[0130] According to the above third embodiment, a UE having the UE capability can maintain compatibility with the existing specification. Furthermore, a UE having the UE capability and a UE not having the UE capability can coexist.

[0131] <Fourth Embodiment>

[0132] The specification of Rel. 16 can support simultaneous TCI state update across multiple BWP / CCs only for single TRP, and the specification after Rel. 17 can support simultaneous TCI state update across multiple BWP / CCs for multi-TRP.

[0133] At least one of the first embodiment to the third embodiment can be specified in the specification after Rel. 17. The specification can not change the operation of Rel. 16.

[0134] At least one of the first to third embodiments can be applied only in a case where a Rel. 17 or later RRC parameter (for example, RRC parameter name "X-r17", X being a parameter name before Rel. 16) is set. If "X-r17" is set, the UE can also follow at least one of the first to third embodiments.

[0135] According to the above fourth embodiment, simultaneous TCI state update across multiple BWPs / CCs can be achieved without changing the Rel. 16 specification.

[0136] (Wireless communication system)

[0137] Hereinafter, a configuration of a wireless communication system to which an embodiment of the present disclosure is applied will be described. In the wireless communication system, any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof is used for communication.

[0138] Figure 3 is a diagram illustrating an example of a schematic configuration of a wireless communication system to which an embodiment is applied. The wireless communication system 1 can also be a system that realizes communication by Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), and the like, which are standardized by the Third Generation Partnership Project (3GPP).

[0139] Further, the wireless communication system 1 can also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC) ). The MR-DC can include E-UTRA-NR Dual Connectivity (EN-DC), NR-E-UTRA Dual Connectivity (NE-DC), and the like.

[0140] In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Secondary Node (SN). In NE-DC, a base station (gNB) of NR is a MN, and a base station (eNB) of LTE (E-UTRA) is a SN.

[0141] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, both the MN and the SN are base stations (gNB) of NR (NR-NR Dual Connectivity (NN-DC))).

[0142] The wireless communication system 1 can also have a base station 11 that forms a macro cell C1 with a wide coverage, and base stations 12 (12a-12c) that are configured within the macro cell C1 and form small cells C2 that are narrower than the macro cell C1. The user terminal 20 can also be located within at least one cell. The configuration, number, and the like of the cells and the user terminal 20 are not limited to the manner shown in the drawing. Hereinafter, the base stations 11 and 12 are collectively referred to as base stations 10 without distinction.

[0143] The user terminal 20 can also be connected to at least one of the multiple base stations 10. The user terminal 20 can also use at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0144] Each CC can be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 can be included in the FR1, and the small cell C2 can be included in the FR2. For example, the FR1 can be a frequency band of 6 GHz or less (sub-6 GHz), and the FR2 can be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, and the like of the FR1 and the FR2 are not limited to these, and for example, the FR1 can correspond to a frequency band higher than the FR2.

[0145] Furthermore, the user terminal 20 can use at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC to perform communication.

[0146] The plurality of base stations 10 can also be connected through wired (for example, optical fiber based on Common Public Radio Interface (CPRI), X2 interface, or the like) or wireless (for example, NR communication). For example, in a case where NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 equivalent to an upper station can also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) can also be referred to as an IAB node.

[0147] The base station 10 can also be connected to the core network 30 via another base station 10 or directly. The core network 30 can also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), or the like.

[0148] The user terminal 20 can also be a terminal that supports at least one of LTE, LTE-A, 5G, or the like.

[0149] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. For example, in at least one of Downlink (DL) and Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like can also be utilized.

[0150] The wireless access scheme can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access schemes (for example, other single carrier transmission schemes, other multicarrier transmission schemes) can also be used in the wireless access schemes of UL and DL.

[0151] As a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared among the user terminals 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and the like can also be used in the wireless communication system 1.

[0152] Further, as an uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), and the like can also be used in the wireless communication system 1.

[0153] User data, higher layer control information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, and the like can also be transmitted through the PUSCH. Further, a Master Information Block (MIB) can also be transmitted through the PBCH.

[0154] Lower layer control information can also be transmitted through the PDCCH. The lower layer control information can also contain, for example, downlink control information (Downlink Control Information (DCI)) containing scheduling information of at least one of the PDSCH and the PUSCH.

[0155] In addition, the DCI that schedules the PDSCH can also be referred to as a DL assignment, a DL DCI, and the like, and the DCI that schedules the PUSCH can also be referred to as an UL grant, an UL DCI, and the like. In addition, the PDSCH can also be replaced with DL data, and the PUSCH can also be replaced with UL data.

[0156] In the detection of the PDCCH, a control resource set (CORESET) and a search space can also be utilized. The CORESET corresponds to a resource in which the DCI is searched for. The search space corresponds to a search area of the PDCCH candidate and a search method. One CORESET can also be associated with one or a plurality of search spaces. The UE can also monitor the CORESET associated with a certain search space based on a search space setting.

[0157] One search space can also correspond to the PDCCH candidate equivalent to one or a plurality of aggregation levels. One or a plurality of search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", and the like of the present disclosure can also be replaced with each other.

[0158] Uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (for example, also referred to as a hybrid automatic repeat request acknowledgement (HARQ-ACK), ACK / NACK, and the like), and a scheduling request (SR) can also be transmitted through the PUCCH. A random access preamble for establishing a connection with a cell can also be transmitted through the PRACH.

[0159] In addition, in the present disclosure, "downlink", "uplink", and the like can also be described without "link". Furthermore, "physical" can also be described without the beginning of various channels.

[0160] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like can also be transmitted. As the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like can also be transmitted in the wireless communication system 1.

[0161] The synchronization signal can be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), or the like. In addition, the SS, the SSB, and the like can also be referred to as a reference signal.

[0162] Furthermore, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), and the like can also be transmitted. In addition, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0163] (Base station)

[0164] Figure 4is a drawing showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. Note that the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 can each be provided more than one.

[0165] Note that, in the present example, functional blocks of the characteristic portions in the present embodiment are mainly shown, and it is also conceivable that the base station 10 has other functional blocks required for wireless communication. Part of the processing of each unit described below can also be omitted.

[0166] The control unit 110 implements control of the entire base station 10. The control unit 110 can be constituted by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0167] The control unit 110 can also control generation of signals, scheduling (for example, resource allocation, mapping), and the like. The control unit 110 can also control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, a sequence, and the like transmitted as signals, and forward them to the transmission / reception unit 120. The control unit 110 can also perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of wireless resources, and the like.

[0168] The transmission / reception unit 120 can include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 can include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0169] The transmission / reception unit 120 can be constituted as an integrated transmission / reception unit, or can be constituted by a transmission unit and a reception unit. The transmission unit can be constituted by the transmission processing unit 1211 and the RF unit 122. The reception unit can be constituted by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0170] The transmission / reception antenna 130 can be constituted by an antenna such as an array antenna and the like, which can be explained based on common knowledge in the technical field to which the present disclosure pertains.

[0171] The transmission / reception unit 120 can also transmit the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 120 can also receive the uplink channel, the uplink reference signal, and the like described above.

[0172] The transmission / reception unit 120 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0173] The transmission / reception unit 120 (transmission processing unit 1211) can also generate a bit string to be transmitted, for example, by performing processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (for example, RLC retransmission control), processing of a Medium Access Control (MAC) layer (for example, HARQ retransmission control), and the like, with respect to data, control information, and the like acquired from the control unit 110.

[0174] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing of channel coding (which can include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-analog conversion, and the like, with respect to the bit string to be transmitted, and output a baseband signal.

[0175] The transmission / reception unit 120 (RF unit 122) can also perform modulation to a wireless band, filter processing, amplification, and the like with respect to the baseband signal, and transmit a signal of the wireless band via the transmission / reception antenna 130.

[0176] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing, demodulation to a baseband signal, and the like with respect to a signal of the wireless band received by the transmission / reception antenna 130.

[0177] The transmission / reception unit 120 (reception processing unit 1212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as necessary), filter processing, demapping, demodulation, decoding (which can also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, and acquire user data and the like.

[0178] The transmission / reception unit 120 (measurement unit 123) can also perform measurement related to the received signal. For example, the measurement unit 123 can also perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like, based on the received signal. The measurement unit 123 can also perform measurement with respect to received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 110.

[0179] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, and the like, and can also acquire, transmit, and the like, user data (user plane data), control plane data, and the like, for the user terminal 20.

[0180] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure can also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0181] The transmission / reception unit 120 can also transmit a list indicating a plurality of cells. The control unit 110 can also apply a command indicating activation of at least one of a transmission control indication (TCI) state and a spatial relation to the plurality of cells. The command can also indicate one of the plurality of cells. The command can also be associated with a control resource set (CORESET) pool.

[0182] (user terminal)

[0183] Figure 5 is a diagram showing an example of a structure of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 can be included.

[0184] Note that in this example, functional blocks of the feature part in the present embodiment are mainly shown, and it is also conceivable that the user terminal 20 has other functional blocks required for wireless communication. Part of the processing of each unit described below can also be omitted.

[0185] The control unit 210 performs control of the entire user terminal 20. The control unit 210 can be constituted by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0186] The control unit 210 can also control generation, mapping, and the like of a signal. The control unit 210 can also control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward them to the transmission / reception unit 220.

[0187] The transmission / reception unit 220 can include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 can include a transmission processing unit 2211 and a reception processing unit 2212. The transmission / reception unit 220 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0188] The transmission / reception unit 220 can be constituted as an integrated transmission / reception unit, or can be constituted by a transmission unit and a reception unit. The transmission unit can be constituted by the transmission processing unit 2211 and the RF unit 222. The reception unit can be constituted by the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0189] The transmission / reception antenna 230 can be constituted by an antenna such as an array antenna and the like, which can be explained based on common knowledge in the technical field to which the present disclosure pertains.

[0190] The transmission / reception unit 220 can also receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 can also transmit the above-described uplink channel, uplink reference signal, and the like.

[0191] The transmission / reception unit 220 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0192] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), and the like, on data, control information, and the like acquired from the control unit 210, to generate a bit string to be transmitted.

[0193] The transmission / reception unit 220 (transmission processing unit 2211) can also perform channel coding (which can include error correction coding), modulation, mapping, filter processing, DFT processing (as necessary), IFFT processing, precoding, digital-analog conversion, and the like, on the bit string to be transmitted, as transmission processing, to output a baseband signal.

[0194] In addition, whether or not to apply DFT processing can also be based on the setting of transform precoding. For a certain channel (for example, PUSCH), in a case where transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-described transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and in a case where this is not so, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-described transmission processing.

[0195] The transmission / reception unit 220 (RF unit 222) can also perform modulation to a radio frequency band, filter processing, amplification, and the like, on the baseband signal, to transmit a signal of the radio frequency band via the transmission / reception antenna 230.

[0196] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filter processing, demodulation to a baseband signal, and the like, on a signal of the radio frequency band received by the transmission / reception antenna 230.

[0197] The transmission / reception unit 220 (reception processing unit 2212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, FFT processing, IDFT processing (as necessary), filter processing, demapping, demodulation, decoding (which can include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, and acquire user data and the like.

[0198] The transmission / reception unit 220 (measurement unit 223) can also perform measurement related to the received signal. For example, the measurement unit 223 can also perform RRM measurement, CSI measurement, and the like, based on the received signal. The measurement unit 223 can also perform measurement with respect to reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 210.

[0199] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0200] The transmission / reception unit 220 can also receive a list indicating a plurality of cells. The control unit 210 can also apply a command indicating activation of at least one of a transmission control indication (TCI) state and a spatial relation to the plurality of cells. The command can also indicate one of the plurality of cells, and the command can be associated with a control resource set (CORESET) pool.

[0201] The at least one of the TCI state and the spatial relation can be at least one of a TCI state for a physical downlink control channel, a TCI state for a physical downlink shared channel, a spatial relation for a physical uplink control channel, and a spatial relation for a sounding reference signal.

[0202] The control unit 210 can also update, with respect to the plurality of cells, any one of a TCI state of a CORESET ID indicated by the command and a TCI state of a CORESET associated with the CORESET pool indicated by the command.

[0203] The TCI state can be associated with one or two TCI codepoints.

[0204] (Hardware structure)

[0205] Further, the block diagrams used in the description of the embodiments above illustrate functional units. These functional units (structural units) are implemented by any combination of hardware and software, and the implementation method of each functional unit is not particularly limited. That is, each functional unit can be implemented by one device physically or logically integrated, or by two or more devices directly or indirectly (for example, by wire, wireless, or the like) connected. Each functional unit can be implemented by combining the above one device or the above plurality of devices with software.

[0206] Here, among the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) that implements a transmission function can also be referred to as a transmitting unit, a transmitter, or the like. Any one of these is as described above, and the implementation method is not particularly limited.

[0207] For example, the base station, the user terminal, and the like in an embodiment of the present disclosure can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 6 is a diagram illustrating an example of a hardware structure of a base station and a user terminal according to an 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 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0208] Further, in the present disclosure, the terms of device, circuit, equipment, section, unit, and the like can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device illustrated in the diagram, or can be configured not to include a part of the devices.

[0209] For example, the processor 1001 is only illustrated one, but there can be a plurality of processors. Further, the processing can be executed by one processor, or the processing can be executed by two or more processors simultaneously, sequentially, or with other methods. In addition, the processor 1001 can be realized by one or more chips.

[0210] As for each function in the base station 10 and the user terminal 20, at least one of the operation by the processor 1001 and the control of the communication via the communication device 1004, or the control of the readout and the writing of the data in the memory 1002 and the storage 1003 is realized, for example, by reading a specific software (program) into the hardware such as the processor 1001, the memory 1002, and the like, and thereby the processor 1001 performs the operation and the control.

[0211] The processor 1001 causes, for example, an operating system to operate to control the entire computer. The processor 1001 can also be constituted by a central processing device (Central Processing Unit (CPU)) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, at least a part of the above-described control unit 110 (210), the transmission-reception unit 120 (220), and the like can also be realized by the processor 1001.

[0212] Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processing according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) can also be realized by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be applied to other functional blocks.

[0213] The memory 1002 can also be a computer-readable recording medium such as at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), other appropriate storage medium. The memory 1002 can also be referred to as a register, a cache, a main storage (main storage device), and the like. The memory 1002 can hold a program (program code), a software module, and the like that can be executed in order to implement the wireless communication method related to an embodiment of the present disclosure.

[0214] The storage 1003 can also be a computer-readable recording medium such as at least one of a flexible disc, a floppy (registered trademark) disc, a magneto-optical disc (e.g., a compact disc read-only memory (CD-ROM) and the like), a digital versatile disc, a Blu-ray (registered trademark) disc), a removable disc, a hard disc drive, an intelligent disk (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and another appropriate recording medium. The storage 1003 can also be referred to as an auxiliary storage device.

[0215] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, also referred to as a network device, a network controller, a network card, a communication module, and the like. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The above-described transceiver 120 (220), a transceiver antenna 130 (230), and the like can also be implemented by the communication device 1004. The transceiver 120 (220) can also be implemented by a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0216] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, and the like) that performs an output to the outside. In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (e.g., a touch panel).

[0217] Furthermore, the processor 1001, the storage 1002, and the like are connected through a bus 1007 for communicating information. The bus 1007 can be configured with a single bus, or different buses can be configured between the devices.

[0218] Furthermore, the base station 10 and the user terminal 20 can also be configured to include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), and the like hardware, and a part or all of the functional blocks can also be implemented using the hardware. For example, the processor 1001 can also be implemented using at least one of these hardware.

[0219] (Modified example)

[0220] In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (a signal or signaling) can also be replaced with each other. In addition, a signal can also be a message. A reference signal (RS) can also be simply referred to as RS, and can also be referred to as a pilot, a pilot signal, and the like depending on the applied standard. In addition, a component carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, and the like.

[0221] A radio frame can also be constituted by one or more periods (frames) in the time domain. Each period (frame) constituting the one or more periods (frames) of the radio frame can also be referred to as a subframe. Further, a subframe can also be constituted by one or more slots in the time domain. A subframe can also be a fixed time length (for example, 1 ms) independent of numerology.

[0222] Here, numerology can also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, numerology can also indicate at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filter processing performed by a transmitter-receiver in the frequency domain, a specific windowing processing performed by the transmitter-receiver in the time domain, and the like.

[0223] A slot can also be composed of one or a plurality of symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Further, a slot can also be a time unit based on a numerology.

[0224] A slot can also include a plurality of mini-slots. Each mini-slot can also be composed of one or a plurality of symbols in the time domain. Further, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (PUSCH) mapping type B.

[0225] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also be referred to by other names respectively corresponding thereto. In addition, a time unit of the frame, the subframe, the slot, the mini-slot, the symbol, and the like in the present disclosure can also be replaced with each other.

[0226] For example, one subframe can also be referred to as a TTI, a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0227] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each user terminal) is allocated to each user terminal in a TTI unit. In addition, the definition of a TTI is not limited thereto.

[0228] A TTI can also be a transmission time unit of a data packet (a transport block), a code block, a codeword, or the like that has been channel-encoded, and can also become a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) to which a transport block, a code block, a codeword, or the like is actually mapped can be shorter than the TTI.

[0229] In addition, in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. In addition, the number of slots (mini-slots) constituting the minimum time unit of scheduling can also be controlled.

[0230] A TTI having a time length 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 slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0231] In addition, the long TTI (e.g., normal TTI, subframe, etc.) can also be replaced with a TTI having a time length of more than 1 ms, and the short TTI (e.g., shortened TTI, etc.) can also be replaced with a TTI having a TTI length shorter than the long TTI and a TTI length of 1 ms or more.

[0232] A resource block (RB) is a resource allocation unit in a time domain and a frequency domain, and can also include one or more contiguous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB can also be the same regardless of numerologies, for example, can also be 12. The number of subcarriers included in the RB can also be determined based on numerologies.

[0233] In addition, the RB can also include one or more symbols in the time domain, and can also be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. can also be constituted by one or more resource blocks, respectively.

[0234] In addition, one or more RBs can also be referred to as a physical RB (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0235] In addition, a resource block can also be constituted by one or more resource elements (REs). For example, one RE can also be a wireless resource area of one subcarrier and one symbol.

[0236] The Bandwidth Part (BWP) (also known 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.

[0237] A BWP can also include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs can also be set within a single carrier.

[0238] 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".

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] Further, information, a signal, and the like can be output in at least one of physical (hard) and logical (soft) directions. Information, a signal, and the like can be input and output via a plurality of network nodes.

[0244] Information, a signal, and the like that are input and output can be stored in a specific location (for example, a memory) and can be managed using a management table. Information, a signal, and the like that are input and output can be overwritten, updated, or added. Information, a signal, and the like that are output can be deleted. Information, a signal, and the like that are input can be transmitted to another device.

[0245] The notification of information is not limited to the manners / embodiments described in the present disclosure, and can be performed using other methods. For example, the notification of information in the present disclosure can also be implemented by physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (for example, Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), and the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0246] In addition, the physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Further, the RRC signaling can also be referred to as an RRC message, and can also be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, and the like. Further, the MAC signaling can also be notified using, for example, a MAC Control Element (CE).

[0247] Further, the notification of specific information (for example, the notification of "X is") is not limited to explicit notification, and can also be performed implicitly (for example, by not performing the notification of the specific information, or by the notification of other information).

[0248] The determination can be made by a value represented by one bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a specific value).

[0249] Software, regardless of being referred to as software, firmware, middle-ware, micro-code, hardware description language, or by other names, should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, and the like.

[0250] Furthermore, software, instructions, information, and the like can also be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a website, a server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber cable, twisted pair cable, Digital Subscriber Line (DSL), and the like) and wireless technologies (infrared rays, microwaves, and the like), at least one of these wired technologies and wireless technologies is included in the definition of a transmission medium.

[0251] The terms "system" and "network" used in the present disclosure can be used interchangeably. The "network" can also mean an apparatus (for example, a base station) included in the network.

[0252] In the present disclosure, the terms of “precoding”, “precoder”, “weight (precoding weight)”, “Quasi-Co-Location (QCL)”, “Transmission Configuration Indication state (TCI state)”, “spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel”, and the like can be used interchangeably.

[0253] In the present disclosure, the terms of “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”, “component carrier”, and the like can be used interchangeably. There is also a case where the base station is called with the terms of macro cell, small cell, femto cell, pico cell, and the like.

[0254] The base station can accommodate one or more (for example, three) cells. In the case where the base station accommodates a plurality of cells, the coverage area of the base station as a whole can be divided into a plurality of smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). The term of “cell” or “sector” refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service within the coverage.

[0255] In the present disclosure, the terms of “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, “terminal”, and the like can be used interchangeably.

[0256] There are also instances where the mobile station is referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or by some other suitable terminology.

[0257] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a wireless communication device, or the like. In addition, at least one of the base station and the mobile station can also be a device mounted on a mobile body, a mobile body itself, or the like. The mobile body can be a vehicle (for example, a car, an airplane, or the like), a mobile body that moves in a unmanned manner (for example, a drone, an automated driving vehicle, or the like), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when a communication operation is performed. For example, at least one of the base station and the mobile station can also be a sensor or an Internet of Things (IoT) device.

[0258] Furthermore, the base station in the present disclosure can also be replaced with a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, also referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), or the like), each of the modes / embodiments of the present disclosure can also be applied. In this case, a structure in which the user terminal 20 has the functions of the base station 10 described above can also be provided. Furthermore, the terms "uplink", "downlink", and the like can also be replaced with terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, and the like can also be replaced with a side channel.

[0259] Likewise, the user terminal in the present disclosure can also be replaced with a base station. In this case, a structure in which the base station 10 has the functions of the user terminal 20 described above can also be provided.

[0260] In the present disclosure, operations performed by a base station are sometimes also performed by an upper node thereof according to the situation. Obviously, in a network including 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 (for example, consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited to these), or a combination thereof.

[0261] Each of the modes / embodiments explained in the present disclosure can be used alone or in combination, and can be used in switching as execution proceeds. Furthermore, the processing procedure, sequence, flowchart, and the like of each of the modes / embodiments explained in the present disclosure can be changed in order as long as there is no contradiction. For example, for the method explained in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0262] The modes / embodiments explained in the present 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) (xG (x is, for example, an integer, a decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), a system using another appropriate wireless communication method, a next-generation system extended based thereon, and the like. Furthermore, a plurality of systems can also be combined (for example, LTE or LTE-A, in combination with 5G, and the like) to be applied.

[0263] The recitation "based on" used in the present disclosure does not mean "only based on" unless specifically written. In other words, the recitation "based on" means both "only based on" and "at least based on".

[0264] Any reference to an element or apparatus using a designation such as "first," "second," and so on does not limit the quantity or order of those elements, nor does it limit the number of those elements. These designations are used in this disclosure as a convenient method of distinguishing between two or more elements or instances of an element. Thus, a reference to the first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element.

[0265] The term "determining" as used in this disclosure can encompass a wide variety of actions. For example, "determining" can include calculating, computing, processing, deriving, investigating, looking up (such as looking up in a table, a database or another data structure), ascertaining and the like.

[0266] Determining can also include receiving (such as receiving information), accessing (such as accessing data in a memory), and the like.

[0267] Determining can also include resolving, selecting, choosing, establishing and the like.

[0268] Determining can also be preceded by operations such as assuming, expecting, considering, thinking and so on.

[0269] The "maximum transmit power" described in this disclosure can mean a maximum value of a transmit power, a nominal maximum transmit power (the nominal UE maximum transmit power), or a rated maximum transmit power (the rated UE maximum transmit power).

[0270] The term "connected", "coupled" or all modifications thereof used in the present disclosure means all connections or couplings between two or more elements directly or indirectly, and can include a case where one or more intermediate elements exist between two elements "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can be replaced with "accessed".

[0271] In the present disclosure, in a case where two elements are connected, one or more electric wires, cables, printed electric connections, and the like can be considered to be used, and electromagnetic energy having a wavelength of a radio frequency region, a microwave region, an optical (both visible and non-visible) region, and the like can be used as several non-limiting and non-inclusive examples to be "connected" or "coupled" to each other.

[0272] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separated", "coupled", and the like can also be interpreted in the same way as "different".

[0273] In the present disclosure, in a case where "include", "including", and modifications thereof are used, these terms mean the same as the term "comprising" and are inclusive. Further, the term "or" used in the present disclosure does not mean the same as "exclusive or".

[0274] In the present disclosure, for example, in a case where an article is added by translation such as a, an, and the in English, the present disclosure can also include a case where a noun following the article is plural.

[0275] The above has been described in detail for the invention related to the present disclosure, but the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented as a modification and a change without departing from the gist and the scope of the invention determined based on the recitations of the claims. Therefore, the recitations of the present disclosure are for the purpose of illustrative explanation and do not have any limiting meaning on the invention related to the present disclosure.

[0276] This application is based on Japanese Patent Application No. 2020-094108 filed on May 29, 2020. The content of the application is incorporated herein in its entirety.

Claims

1. A terminal, having: a transmission unit that transmits capability information indicating support for application of a command indicating activation of two transmission control indication (TCI) states corresponding to one codepoint for a plurality of cells; a reception unit that receives a list indicating the plurality of cells; and a control unit that applies the command to the plurality of cells in a case where the command is received for one of the plurality of cells.

2. A wireless communication method of a terminal, having: a step of transmitting capability information indicating support for application of a command indicating activation of two transmission control indication (TCI) states corresponding to one codepoint for a plurality of cells; a step of receiving a list indicating the plurality of cells; and a step of applying the command to the plurality of cells in a case where the command is received for one of the plurality of cells.

3. A base station, having: a reception unit that receives capability information indicating support for application of a command indicating activation of two transmission control indication (TCI) states corresponding to one codepoint for a plurality of cells; a transmission unit that transmits a list indicating the plurality of cells; and a control unit that applies the command to the plurality of cells in a case where the command is transmitted for one of the plurality of cells.

4. A system having a terminal and a base station, the terminal having: a transmission unit that transmits capability information indicating support for application of a command indicating activation of two transmission control indication (TCI) states corresponding to one codepoint for a plurality of cells; a reception unit that receives a list indicating the plurality of cells; and a control unit that applies the command to the plurality of cells in a case where the command is received for one of the plurality of cells, the base station having: a transmission unit that transmits a list indicating the plurality of cells. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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