Terminal, radio communication method, and base station

Abstract

To appropriately apply a TCI state.SOLUTION: A terminal according to an aspect of the present disclosure has: a receiving section that receives settings for applying two transmission configuration indication (TCI) states for an uplink and receives information indicating two TCI states for a downlink or jointing; and a control section that applies one TCI state, of the indicated two TCI states, to reception of the downlink.SELECTED DRAWING: Figure 4

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 technology]

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

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

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0005] In future wireless communication systems, in order to expand UL coverage, a configuration in which a UE uses more UL reception points than DL transmission points is being considered.

[0006] However, the behavior regarding the transmission configuration indication (TCI) state in such a configuration has not been fully studied. If the TCI state is not applied appropriately, communication quality / throughput may be degraded.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a radio communication method, and a base station that can appropriately apply the TCI state. [Means for solving the problem]

[0008] A terminal according to one embodiment of the present disclosure includes a receiving unit that receives a configuration for applying two transmission configuration indication (TCI) states for an uplink and receives information indicating two TCI states for a downlink or joint, and a control unit that applies one of the two indicated TCI states to reception of the downlink. [Effects of the Invention]

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

[0010] [Figure 1] Fig. 1A is a diagram showing an example of a typical arrangement of transmission and reception points, and Fig. 1B is a diagram showing an example of a high-density UL arrangement. [Figure 2] FIG. 2 is a diagram illustrating an example of DL / UL coverage of a Heterogeneous Network (HetNet). [Figure 3]FIG. 3 shows an example of operation for two indicated TCI states in an asymmetric DL sTRP / UL mTRP deployment scenario. [Figure 4] FIG. 4 shows an example of procedure A2. [Figure 5] FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (Unified / Common TCI Framework) The unified TCI framework allows multiple types of channels / RSs (UL / DL) to be controlled by a common framework. Instead of specifying TCI states or spatial relationships for each channel as in Rel. 15, the unified TCI framework may specify a common beam (joint TCI state) and apply it to all UL and DL channels, or may apply a common beam for UL (UL TCI state) to all UL channels and a common beam for DL ​​(DL TCI state) to all DL channels.

[0012] One beam for both DL and UL (one joint TCI state) or one beam for DL ​​and one for UL (two separate TCI states, DL TCI state and UL TCI state) is considered.

[0013] The unified TCI framework supports modes 1 to 3 below. <<Mode 1>> MAC CE-based TCI state indication <<Mode 2>> DCI-based TCI state indication by DCI format 1_1 / 1_2 with DL assignment <<Mode 3>> DCI-based TCI state indication by DCI format 1_1 / 1_2 without DL assignment

[0014] Note that the DCI in the above Mode 2 / Mode 3 may also be referred to as beam indication DCI.

[0015] In the present disclosure, the TCI state indicated by DCI, the Indicated TCI state, the indication TCI state, the unified TCI state, the TCI state applied to multiple types of channels / signals, the joint TCI state for DL and UL, the DL TCI state, the UL TCI state, the Rel.17 TCI state, the common TCI state, the single unified TCI state set, the single unified TCI state activated, may be read as each other.

[0016] In the present disclosure, the TCI state set by RRC parameters, the configured TCI state, the set TCI state, the TCI state not conforming to the unified TCI state, the TCI state other than the unified TCI state, the TCI state / space relationship set for a specific channel / signal, the individual TCI state, may be read as each other.

[0017] <Application of the Indicated TCI State in Rel.17> The Indicated TCI state by MAC CE / DCI ("indicated TCI state") may be applied to the following channels / RS:

[0018] <<pdcch>> One TCI state applied to the PDCCH may be based on: ◆If followUnifiedTCIState is set for CORESET0, the indicated TCI state applies. Otherwise, the Rel.15 specification applies for that CORESET. That is, CORESET0 follows the TCI state activated by the MAC CE or is QCL'd with SSB. ◆For CORESETs with index other than 0 with USS / CSS type 3, the indicated TCI state always applies. ◆If a CORESET with index other than 0, with at least a CSS other than CSS type 3, is configured to follow the unified TCI state, the indicated TCI state applies. Otherwise, the configured TCI state for that CORESET applies to that CORESET.

[0019] < <pdsch>> One TCI state applied to the PDSCH may be based on: ◆The indication TCI state always applies to all UE-dedicated PDSCHs. For a non-UE-dedicated PDSCH (a PDSCH scheduled by a DCI in a CSS), if followUnifiedTCIState is set [for the CORESET of the PDCCH that schedules the PDSCH], the indicated TCI state may apply. Otherwise, the configured TCI state for the PDSCH applies to the PDSCH. If followUnifiedTCIState is not set for a PDSCH, whether a non-UE-dedicated PDSCH follows the indicated TCI state may depend on whether followUnifiedTCIState is set for the CORESET used to schedule the PDSCH.

[0020] < <csi-rs>> One TCI state applied to the CSI-RS may be based on: For an aperiodic (A)-CSI-RS for CSI acquisition or beam management, if followUnifiedTCIState is set [for the CORESET of the PDCCH that triggers that A-CSI-RS], the indicated TCI state applies. For other CSI-RSs, the configured TCI state for that CSI-RS applies.

[0021] < <pucch>> One TCI state applied to the PUCCH may be based on: ◆ For all dedicated PUCCH resources, the indication TCI state always applies.

[0022] < <pusch>> One TCI state applied to the PUSCH may be based on: ◆ For dynamic / configured grant PUSCH, the indicated TCI state is always applied.

[0023] < <srs>> One TCI state applied to SRS may be based on the following. ◆ When it is set that for an SRS resource set for aperiodic (A)-SRS for beam management purposes and A / semi-persistent (SP) / periodic (P)-SRS for codebook (CB) / non-codebook (NCB) / antenna switching purposes, it follows a unified TCI state, the indicated TCI state is applied. For other SRSs, the set TCI state within that SRS resource set is applied.

[0024] In the present disclosure, the indicated TCI state, the unified TCI state, the TCI state applied to a channel / signal set to follow the unified TCI state, the TCI state applied to a CORESET / PDCCH associated with a UE individual PDSCH and USS, and the TCI state applied to a PUCCH and a PUSCH may be mutually read as each other.

[0025] <Application of the indicated TCI in Rel.18 (sDCI mTRP)> In sDCI mTRP, the application of the indicated TCI state may be based on the following.

[0026] < <pdcch>> The one or more TCI states applied to the PDCCH may be based on: ◆If followUnifiedTCIState is set for CORESET0, applyIndicatedTCIState={1st TCI state, 2nd TCI state, both} is set for each CORESET to indicate which indicated TCI state applies. Otherwise, the Rel.15 specification is applied for that CORESET. That is, CORESET0 follows the TCI state activated by the MAC CE or is QCL'd with SSB. "Both" does not apply to CORESET0 with SearchSpace0 for CSS set of type 0 / 0A / 2. ◆For CORESETs with USS / CSS type 3 and index other than 0, applyIndicatedTCIState={first TCI state, second TCI state, both} is set for each CORESET to notify which indicated TCI state applies. ◆If a CORESET with index other than 0 and with a CSS other than at least CSS type 3 is configured to follow the unified TCI state, applyIndicatedTCIState={first TCI state, second TCI state, both} is set for each CORESET to indicate which indicated TCI state applies. Otherwise, the configured TCI state for that CORESET applies to that CORESET.

[0027] < <pdsch>> One or two indication TCI states are always applied to the PDSCH. The one or more TCI states applied to the PDSCH may be based on: ◆For a PDSCH scheduled / activated by DCI format 1_1 / 1_2, the 2-bit TCI selection field in the scheduling / activation DCI format 1_1 / 1_2 can indicate which indication TCI state {first TCI state, second TCI state, both} applies. If the TCI selection field is not set, both indication TCI states apply. ◆RRC configures which indication TCI state {first TCI state, second TCI state, both} applies to the PDSCH scheduled / activated by DCI format 1_0. ◆If PDSCH-CJT (CJT-PDSCH) or PDSCH-SFN (SFN-PDSCH) is configured, only both indication TCI states can be configured.

[0028] < <csi-rs>> One or more TCI states applied to CSI-RS may be based on the following. ◆ For A-CSI-RS for CSI acquisition or beam management, when followUnifiedTCIState is set for the CORESET of the PDCCH that triggers the A-CSI-RS, in order to notify which indicated TCI state is applicable, applyIndicatedTCIState = {the first TCI state, the second TCI state, both} is set for each CSI-RS resource set or each CSI-RS resource. For other CSI-RS, the configured TCI state for that CSI-RS is applied.

[0029] <<TCI state indication for PDSCH-CJT>> In sDCI mTRP, the TCI state indication for PDSCH-CJT may be based on the following: ◆ One or two indicated joint TCI states are applied to PDSCH-CJT (across up to 4 TRPs). Up to 4 TRPs share the same one or two TCI states (TRS / CSI-RS QCL source RS). ◆ The following two schemes are supported: ― ◆ CJT scheme A (cjtSchemeA): The PDSCH DM-RS ports are QCLed with multiple DL-RSs for both indicated TCI states regarding QCL type A. ― ◆ CJT scheme B (cjtSchemeB): The PDSCH DM-RS ports are QCLed with multiple DL-RSs for both indicated TCI states regarding QCL type A, excluding the QCL parameters {Doppler shift, Doppler spread} of the second indicated joint TCI state.

[0030] < <pucch>> The one or more TCI states applied to the PUCCH may be based on: ◆ applyIndicatedTCIState={first TCI state, second TCI state, both} is set for each PUCCH resource / resource group.

[0031] < <pusch>> The one or more TCI states applied to the PUSCH may be based on: ◆The indicated TCI state is always applied to the PUSCH of a dynamic grant (DG) / configured grant (CG). -◆For PUCHs scheduled / activated by DCI format 0_0, the indicated TCI state always applies. -◆For Type 1 CG PUSCH, applyIndicatedTCIState={first TCI state, second TCI state, both} is set. - The SRS resource set indicator field indicates which one or both SRS resource sets are used.

[0032] < <srs>> One or more TCI states applicable to SRS may be based on the following. ◆ When the SRS resource set for A-SRS for beamManagement or A / SP / P-SRS for codebook or nonCodebook or antennaSwitching has followUnifiedTCI-StateSRS set, for each SRS resource set, applyIndicatedTCIState={the first TCI state, the second TCI state, both} is set to indicate which indicated TCI state is applicable. For other SRSs, the set TCI state within the SRS resource set is applicable.

[0033] <Application of Indicated TCI in Rel.18 (mDCI mTRP)> In mDCI mTRP, the application of the indicated TCI state may be based on the following.

[0034] < <pdcch>> The one or more TCI states applied to the PDCCH may be based on: ◆If followUnifiedTCIState is set for CORESET0, the indicated TCI state applies. Otherwise, the Rel. 15 specification is applied. That is, the TCI state that applies is the TCI state activated by the MAC CE or QCL with SSB. ◆For CORESETs other than index 0 with only USS / CSS type 3, the indicated TCI state always applies. ◆If followUnifiedTCIState is configured for a CORESET other than index 0 with at least a CSS other than CSS type 3, the indicated TCI state applies. Otherwise, the configured TCI state of that CORESET applies. ◆The TCI state specified for coresetPoolIndex={0,1} is applied to the corresponding CORESET. < <pdsch>> One indication TCI state is always applied to the PDSCH. One TCI state applied to the PDCCH may be based on: ◆ The TCI state specified for coresetPoolIndex={0,1} applies to the PDSCH scheduled / activated by the corresponding CORESET.

[0035] < <csi-rs>> One TCI state applied to the CSI-RS may be based on: ◆When followUnifiedTCIState is set for an A-CSI-RS for CSI acquisition or beam management, applyIndicatedTCIState={first TCI state, second TCI state, both} is set for each CSI-RS resource set or each CSI-RS resource to indicate which indicated TCI state applies. For other CSI-RSs, the configured TCI state for that CSI-RS applies. ◆The first or second indicated TCI state corresponds to the TCI state specified for coresetPoolIndex={0,1}, respectively.

[0036] < <pucch>> One TCI state applied to the PUCCH may be based on: ◆ applyIndicatedTCIState={first TCI state, second TCI state, both} is set for each PUCCH resource / resource group.

[0037] < <pusch>> One TCI state applied to the PUSCH may be based on: ◆The indicated TCI state is always applied to the PUSCH of a dynamic grant (DG) / configured grant (CG). - For DG PUSCH and type 2 CG PUSCH, the first or second indicated TCI state corresponding to the TCI state specified for coresetPoolIndex={0,1} is applied. -◆For Type 1 CG PUSCH, applyIndicatedTCIState={first TCI state, second TCI state, both} is set.

[0038] < <srs>> One TCI state applicable to SRS may be based on the following. ◆ When the SRS resource set for A-SRS for beamManagement or A / SP / P-SRS for codebook or nonCodebook or antennaSwitching has followUnifiedTCI-StateSRS set, for each SRS resource set, applyIndicatedTCIState={the first TCI state, the second TCI state, both} is set to indicate which indicated TCI state is applicable. For other SRSs, the configured TCI state within the SRS resource set is applicable. ―◆ The first or second indicated TCI state respectively corresponds to the TCI state specified for coresetPoolIndex={0,1}. ―◆ For A-SRS, when applyIndicatedTCIState is not set, the indicated TCI state specified for the coresetPoolIndex of the triggering PDCCH is applicable. ―◆ For SRS for codebook or nonCodebook, the first and second indicated TCI states are respectively applied to the first and second SRS resource sets.

[0039] <TCI Indication in Rel.18> The configuration of the TCI state by RRC is based on the following. ◆ Up to 128 TCI states can be configured for one serving cell. In the 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.

[0040] The activation of the TCI state by MAC CE is based on the following. In a single TRP transmission, up to eight TCI states can be activated for one serving cell or for one BWP of one serving cell. In switching between multiple TRPs with different PCIs, multiple activated TCI states can be associated with SSBs of different PCIs, and TCI states of up to eight PCIs can be activated. In multi-TRP joint transmission, up to 8 TCI states can be activated per TRP / cell, and up to 16 TCI states can be activated in total. In joint transmission using multiple TRPs with different PCIs, multiple activated TCI states can be associated with SSBs of different PCIs, and TCI states of up to 2 PCIs can be activated.

[0041] The indication of TCI status by the DCI is based on the following: ◆Multiple codepoints in the TCI indication field in the DCI are mapped to multiple TCI states activated via the MAC CE. ◆In single TRP transmission, one code point in the TCI indication field in the DCI is mapped to one joint DL and UL TCI, or one DL TCI and one UL TCI, or one DL TCI, or one UL TCI. ◆In single DCI-based multi-TRP joint transmission, one code point in the TCI indication field in the DCI is mapped to one or two 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. In multi-DCI-based multi-TRP joint transmission, one code point in the TCI indication field in the DCI is mapped to one or two DL and UL joint TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs. Multiple DCIs indicate the TCI status for multiple TRPs.

[0042] In Rel. 18, the unified TCI states for single TRP (sTRP) are extended to support multi-TRP (mTRP) in Rel. 16-18 as follows: ◆ mTRP based on single DCI (sDCI): -◆Rel.16 sDCI mTRP PDSCH (NCJT, repeat) - Rel.17 sDCI mTRP PUSCH / PUCCH / PDCCH repetition - Rel.17 SFN-PDCCH / PDSCH -Rel.18 PDSCH-CJT ―◆Rel.18 sDCI simultaneous transmission with multiple panels(STxMP) PUSCH / PUCCH ◆ mTRP based on multi-DCI (mDCI): ―◆Rel.16 mDCI mTRP PDSCH(NCJT) ―◆Rel.18 mDCI STxMP PUSCH / PUCCH

[0043] In the Rel.18 Unified TCI Framework, the following is assumed: ◆ RRC based switching between joint TCI state and separate UL and DL TCI state. ◆The TI status list configured by RRC is common across multiple TRPs. Both CC-specific TCI pools and CC-common TCI pools in Rel.17 are supported. ◆TCI status ID indication based on MAC CE / DCI in the CC list in Rel.17 is diverted. ◆The beam application timing (BAT) in Rel.17 will be reused.

[0044] In the sDCI mTRP, one DCI / MAC CE indicates a joint TCI state or up to two sets of UL and DL TCI states. The indication may be based on:

[0045] ◆ The TCI field in DCI format 1_2 / 1_2 [with or without DL assignment] indicates at least one TCI state, first and second. If only one TCI state (e.g., the second TCI state) is indicated, the UE updates the indicated TCI state and maintains the other TCI state (e.g., the first TCI state). If two TCI states are indicated, the UE updates both TCI states.

[0046] ◆ Once two TCI states are indicated, the UE maintains the two indicated TCI states. However, this does not mean that both of the two indicated TCI states are always applied to all channels / RSs. Which indicated TCI state applies to each channel / RS is defined in the specification, configured by RRC, or indicated by DCI.

[0047] In the mDCI mTRP, the PDSCH scheduled / activated by DCI format 1_1 / 1_2 may be based on the following:

[0048] ◆ A new 2-bit TCI selection ("TCI selection") field in the scheduling / activation DCI format 1_1 / 1_2 can indicate which one or two indicated TCI states will be applied to the scheduled / activated PDSCH. This enables dynamic switching between the sTRP PDSCH and the mTRP PDSCH by the scheduling / activation DCI. The values ​​00, 01, 10, and 11 of the TCI selection field correspond to the first TCI state, the second TCI state, the first and second TCI states, and a reserved value, respectively. For example, if the TCI selection field indicates 00, the sTRP PDSCH using the first TCI state will be scheduled / activated.

[0049] However, this TCI selection behavior requires the UE to buffer two beams before the end of DCI decoding in FR2 because the UE does not know the value of the TCI selection field before DCI decoding. This TCI selection behavior is applicable when the UE reports capability of two default beams in FR2, or when the UE does not have capability of two default beams in sDCI mTRP in FR2 and the scheduling offset is greater than the threshold timeDurationForQCL, or when in FR1.

[0050] ◆For PDSCH scheduled / activated by DCI format 1_0 / 1_1 / 1_2, if the scheduling offset is less than or equal to the threshold timeDurationForQCL and the UE does not support the two default TCI states in sDCI mTRP in FR2, the first TCI state is always applied.

[0051] <Procedure for two indication TCI states (antenna port pseudo-collocation)> When the UE has dl-OrJointTCI-StateList configured and has two indicated TCI states, there are several cases x: Case 1 Regardless of the offset between the reception of scheduling DCI format 1_0 / 1_1 / 1_2 and the reception of the scheduled / activated PDSCH, if the UE operates in FR1 or if the UE reports default QCL-TwoTCI capability in FR2. Case 2 If the UE does not report defaultQCL-TwoTCI capability in FR2 and the scheduling offset between the reception of scheduling DCI format 1_0 / 1_1 / 1_2 and the reception of the scheduled / activated PDSCH is greater than or equal to timeDurationForQCL.

[0052] In case 1 or case 2, the UE operates based on the following procedure x.

[0053] -◆Step 1 The UE can configure the higher layer parameter applyIndicatedTCI-StateDCI-1-0 to indicate whether the first indicated TCI state, the second indicated TCI state, or both indicated TCI states among one or more indicated TCI states are to be applied to PDSCH reception scheduled or activated by DCI format 1_0. If the UE is configured with cjt-Scheme-PDSCH and reports twoTCI-StatePDSCH-CJT-TxScheme, or if the UE is configured with sfnSchemePdsch, the UE can configure applyIndicatedTCI-StateDCI-1-0 with only the value both (indicating both indicated TCI states). In this case, the UE applies both indicated TCI states to PDSCH reception scheduled or activated by DCI format_0 on search spaces other than Type0 / 0A / 2 of Article CORESET#0.

[0054] -◆Step 2 If the UE is not configured with applyIndicatedTCI-StateDCI-1-0, the first indicated TCI state applies to PDSCH reception scheduled or activated by DCI format 1_0.

[0055] - Step 3 If the UE is jointly configured with tciSelection-PresentInDCI for both DCI formats 1_1 and 1_2 in the same DL BWP and the UE receives DCI format 1_1 / 1_2 that schedules or activates PDSCH reception, the UE determines one or more indication joint / DL TCI states for PDSCH reception according to some of the following steps 3-x. --◆Step 3-1 If the DCI format 1_1 / 1_2 indicates codepoint "00" in the TCI selection field, the UE applies the first of the two indicated joint / DL TCI states to all PDSCH DM-RSs of the corresponding PDSCH transmission occasions scheduled or activated by the DCI format 1_1 / 1_2. --◆Step 3-2 If the DCI format 1_1 / 1_2 indicates codepoint "01" in the TCI selection field, the UE applies the second of the two indicated joint / DL TCI states to all PDSCH DM-RSs of the corresponding PDSCH transmission occasions scheduled or activated by the DCI format 1_1 / 1_2. --◆Step 3-3 If the DCI format 1_1 / 1_2 indicates codepoint "11" in the TCI selection field, the UE applies both indicated joint / DL TCI states to all PDSCH DM-RS of the corresponding PDSCH transmission occasions scheduled or activated by the DCI format 1_1 / 1_2.

[0056] - Step 4 If the UE is not configured with tciSelection-PresentInDCI and the UE receives DCI format 1_1 / 1_2 that schedules or activates PDSCH reception, the UE applies both indication TCI states to the scheduled or activated PDSCH reception.

[0057] (UL Power Control Parameters for TCI State) In the existing specifications, the power control parameters of the path loss RS and the PUSCH / PUCCH / SRS are associated with the TCI state.

[0058] When the Rel.17 TCI state is set, the Rel.15 / 16 TCI state and spatial relationship information (except positioning) cannot be set in the same band. For channels / RSs that do not apply the specified TCI state, the Rel.17 TCI state may be set instead of the Rel.15 / 16 TCI state and spatial relationship information.

[0059] The UE may transmit UE capability information indicating that different power control parameters are associated with each TCI state. If the UE does not support this UE capability, default power control parameters may be used. The default power control parameters may be, for example, the pathloss reference RS-ID (pathlossReferenceRS-Id-r17).

[0060] (Scenario 1: High-density UL deployment (TRP with only UL)) In Rel. 15 NR, the coverage (reaching distance) of PUSCH, PUCCH, PRACH, PDSCH, PDCCH, and PBCH is uneven. The coverage of PUSCH is limited, especially at higher frequencies. Future wireless communication systems (e.g., Rel. 18, Rel. 19, or later) are expected to improve at least one of UL coverage and UL throughput.

[0061] In order to expand UL coverage, the installation of UL receiving points in addition to general transmitting and receiving points is being considered. Here, we will explain examples of the layout of general transmitting and receiving points and an example of a layout with UL receiving points (UL dense deployment).

[0062] Figure 1A shows an example of a typical arrangement of transmission / reception points. In Figure 1A, a UE receives a DL signal from a transmission / reception point (TRP) and transmits a UL signal to the TRP. For example, if the UE and the TRP are far apart, the path loss may be large, resulting in a deterioration in communication quality.

[0063] FIG. 1B is a diagram showing an example of a high-density UL deployment. To expand UL coverage, it is being considered to provide UL reception points as shown in FIG. 1B in addition to DL transmission points. In FIG. 1B, a UE receives DL signals from a DL transmission point (TRP / Central TRP / DL TRP / Macro TRP) corresponding to a macro cell and transmits UL signals to a UL reception point (e.g., a reception point with a smaller path loss / reception power). However, the UE may also be capable of UL transmission to a DL transmission point.

[0064] By using a high-density UL deployment like that shown in Figure 1B, both coverage and UL data rates can be improved by reducing path loss, improving UL signaling quality, and obtaining higher coding rates compared to the general deployment like that shown in Figure 1A. Also, since the UL receiving point mainly performs reception, it requires fewer functions (e.g., power amplifiers) and is therefore less costly than the transmitting / receiving points corresponding to typical small cells, making deployment management much easier.

[0065] In scenario 1, UL transmission of multiple TRPs may not be supported. For example, even if there are two TCIs to be indicated, UL TCI (UL single TRP) may always be indicated to one UE.

[0066] Alternatively, in Scenario 1, multi-TRP UL transmission (e.g., TDM / FDM repetition, SDM / SFN multi-panel simultaneous transmission, or all of them) may be supported. It may be specified that one of the two UL TRPs must be a DL TRP, or one of the two UL TRPs may be a DL TRP.

[0067] (Scenario 2: Decoupling of DL TRP and UL TRP in Heterogeneous Networks) In this disclosure, a Heterogeneous Network (HetNet) using a macro Base Station (BS) (DL TRP) and a micro BS (UL TRP) may be applied (Figure 2). In a typical HetNet, the transmission power of the macro BS and the micro BS is different. Also, the optimal DL coverage and the optimal UL coverage are different. For example, DL coverage is determined by RSRP, and UL coverage is determined by path loss (PL).

[0068] In the example shown in Figure 2, the UE is included in the optimal DL coverage of the macro BS and the optimal UL coverage of the micro BS. In this case, the UE can receive DL signals from the macro BS and transmit UL signals to the micro BS. However, the UE may transmit some reference signals / channels (e.g., an SRS with an antenna switching (AS) usage, used for DL ​​CSI acquisition) to the macro BS. Therefore, the UE may require two timing advances (TAs) in this scenario. Note that the AS SRS is transmitted to the macro BS because it is used by the base station (macro BS) to measure DL CSI (e.g., to determine the DL MIMO precoder) based on the reception of the SRS using channel reciprocity. On the other hand, the codebook / non-codebook SRS is transmitted to the micro BS because it is used for PUSCH precoder / beam determination.

[0069] In a HetNet, even if a micro BS has DL transmission capability, it can save energy by turning off its DL function most of the time. In this case, the function of the micro BS is similar to a UL-only TRP (UL Receiving Point).

[0070] In the present disclosure, asymmetric DL sTRP / UL mTRP and asymmetric HetNet (A-HetNet) may be read as interchangeable.

[0071] (Receive path loss (PL) information) The UE may receive first information indicating a path loss (PL) used for transmission power control (TPC), which is estimated and notified (transmitted) by the network, via DL signaling. The DL signaling may be at least one of higher layer signaling (e.g., RRC or MAC CE) and physical layer signaling (e.g., Downlink Control Information (DCI)).

[0072] The UE receives the path loss (PL b,f,c (q d ), P.L. b,f,c )(index q d The UL signal transmit power (e.g., transmit power of PUSCH / PUCCH / SRS / PRACH) for a reception point that does not transmit downlink data may be calculated using the active UL BWP b of carrier f of serving cell c using the path loss for b.

[0073] <Option 1> The absolute path loss (PL) value [dB] for each RS index may be notified (transmitted) from the network to the UE. The UE may directly use the notified absolute path loss value to calculate the transmission power.

[0074] <Option 2> The network may notify (transmit) the relative path loss (delta PL, PL offset) value [dB] for each RS index to the UE. The UE may use the path loss value obtained by applying (adding or subtracting) the received delta PL value to the conventional path loss value estimated from the DL RS transmitted from the macro cell (macro BS / central TRP) for transmission power calculation.

[0075] The PL value / delta PL value in options 1 and 2 is q d The PL value / delta PL value may be signaled / configured for each index of the RS / SSB / CSI-RS / SRS resource / SRS resource set. One or more RS indices and the PL value / delta PL value corresponding to each RS index may be signaled by DL signaling. The PL value / delta PL value may be interpreted as a PL parameter / delta PL parameter.

[0076] An association (correspondence) between an RS index and a PL value / delta PL value may be defined. For example, one RS index may correspond to multiple PL values / delta PL values. Note that a quantization table (range and step) for the PL value / delta PL value may be predefined in the specification. The notified PL value / delta PL value may be a quantized value or an index of a quantized value.

[0077] The UL reception point receives / measures the UL signal. If the DL transmission point (macro TRP / gNB) knows the transmission power of this UL signal, the DL transmission point can know the exact PL value of the UL reception point. In this case, the DL transmission point can notify the UE of the absolute PL value (X [dB]) of the UL reception point.

[0078] When both the DL transmission point (macro TRP / gNB) and the UL reception point measure the same resource, the DL transmission point can recognize the difference between the PL between the DL transmission point and the UE and the PL between the UL reception point and the UE. In this case, the DL transmission point may notify the UE of the difference (relative PL / delta PL). The relative PL / delta PL may also be called a PL offset.

[0079] As described above, even if the UE is not notified of the DL RS (RS index) used for path loss estimation, the UE can calculate the transmission power using the notified PL value / delta PL value.

[0080] If the PL-RS is transmitted to the UE from the DL sTRP, the PL offset for the PL calculation to the UL TRP(s) may be set.

[0081] The channels / RS for which PL offset is supported may be all UL channels / RS after RRC connection setup, such as SRS, PUSCH, PUCCH, and PRACH (PDCCH order PRACH to UL TRP may be used when two TAs are applied).

[0082] In asymmetric DL single TRP (sTRP) / UL multi-TRP (mTRP) deployment scenarios, associating a UL TCI state with a PL offset may be supported. When a UL TCI state associated with a PL offset applies to PUSCH / PUCCH / SRS transmission, the UE calculates the PL and Tx power of the PUSCH / PUCCH / SRS based on the DL PL RS and PL offset associated with this UL TCI state. Existing UL power control schemes can be reused by replacing the existing PL with the UL PL derived from the DL PL RS and PL offset.

[0083] For PUSCH / PUCCH / SRS, a PL offset value may be configured for each UL TCI state. If the PL offset is configured for each UL TCI state, the UE may calculate the PL using the PL offset value.

[0084] For the PRACH, a set of PL offset values ​​may be configured in the PRACH configuration (PRACH-Config in RRC). The PDCCH may indicate one of the PL offset values ​​for the PDCCH-ordered PRACH.

[0085] When a PL-RS is transmitted from a DL TRP to a UE, the PL offset does not need to be configured (absent). Since a PL-RS is not transmitted from a UL TRP to a UE, a PL offset (X1, X2) is configured for each UL TRP / TCI.

[0086] For DL ​​TRP (TCI state), the PL offset may not be set (absent).

[0087] A PL offset may be set for the UL TRP (TCI state).

[0088] The use of only RRC to update the PL offset associated with the UL TCI state, and the use of MAC CE in addition to RRC to update the PL offset associated with the UL TCI state are considered.

[0089] In this disclosure, PL offset, PLoffset b,f,c , PLoffset b,f,c (q d ), may be read interchangeably.

[0090] (SRS switching) DCI format 2_3 is applied to uplink carriers of a serving cell for which the UE is not configured for PUSCH / PUCCH transmission, or for which srs-PowerControlAdjustmentStates indicates separate power control adjustment states between SRS transmission and PUSCH transmission. A UE for which the parameter carrierSwitching is configured by higher layers is provided with the following (1) to (7).

[0091] (1) TPC-SRS-RNTI for DCI format 2_3 with parameter tpc-SRS-RNTI.

[0092] (2) The index of the serving cell from which the UE will discontinue transmission in order to transmit SRS on one or more other serving cells, via the parameter srs-SwitchFromServCellIndex.

[0093] (3) Indication of the uplink carrier from which the UE should suspend transmission in order to transmit SRS in one or more other serving cells, via the parameter srs-SwitchFromCarrier.

[0094] (4) DCI format 2_3 field setting type according to Type A or Type B. In the case of Type A, the index of the serving cell set is provided by cc-SetIndex, the index of the serving cell in the serving cell set is provided by cc-IndexInOneCC-Set, and the DCI format 2_3 field includes a TPC command for each serving cell from the serving cell set and may also include an SRS request for SRS transmission on the serving cell set. In the case of Type B, the DCI format 2_3 field includes a TPC command for the serving cell index and may include an SRS request for SRS transmission on the serving cell.

[0095] (5) An indication to the serving cell whether the field in DCI format 2_3 contains an SRS request in fieldTypeFormat2-3. A value of 0 / 1 in this indication indicates the absence / presence of an SRS request. The mapping between the 2-bit SRS request and the SRS resource set is as specified in the specification.

[0096] (6) startingBitOfFormat2-3 indicates the index for the position in DCI format 2_3 of the first bit of the field for the non-supplementary uplink carrier of the serving cell.

[0097] (7) startingBitOfFormat2-3 Index for the position in DCI format 2_3 of the first bit of the field for the supplementary uplink carrier of the serving cell according to SUL-v1530.

[0098] In the existing specifications (up to Rel. 18), startingBitOfFormat2-3 / startingBitOfFormat2-3SUL-v1530 is specified as an integer between 1 and 31.

[0099] (Two Closed Loop Power Control (CL-PC) Adjustment States for PUSCH) The higher layer parameters related to PUSCH power control (PUSCH-PowerControl) include twoPUSCH-PC-AdjustmentStates and the size of sri-PUSCH-PowerControlId. The higher layer parameters related to PUSCH power control using SRI (SRI-PUSCH-PowerCotrol) include sri-PUSCH-PowerControlId and sri-PUSCH-ClosedLoopIndex. When twoPUSCH-PC-AdjustmentStates is configured, the UE may configure sri-PUSCH-ClosedLoopIndex with l={0,1}.

[0100] sri-PUSCH-ClosedLoopIndex applies only to PUSCH. The UE determines whether the closedLoopIndex of the scheduled PUSCH is 0 or 1 based on the SRI. However, the closedLoopIndex for the SRS of the indicated CB / NCB follows the setting of srs-PowerControlAdjustmentStates.

[0101] When two SRS resource sets with usage = CB / NCB are configured, each SRS resource set corresponds to l={0,1}, i.e., one SRS resource set corresponds to l=0 and the other SRS resource set corresponds to l=1.

[0102] (CL-PC adjustment status for SRS) The CL-PC adjustment state for the SRS is defined according to at least one of the following cases 1 to 3. <Case 1> If srs-PowerControlAdjustmentStates=absent or sameAsFci2 (follows the CL-PC adjustment state of PUSCH), the UE may apply the same CL-PC adjustment state as that of PUSCH. <Case 2> If srs-PowerControlAdjustmentStates = separateClosedLoop and tpc-Accumulation is not provided (SRS-specific CL-PC adjustment state is configured and TPC accumulation is not configured), the UE may determine / decide / apply the CL-PC adjustment state of the SRS taking into account (based on) the sum of the TPC commands for the SRS jointly coded by DCI format 2_3. <Case 3> If srs-PowerControlAdjustmentStates = separateClosedLoop and tpc-Accumulation is provided (SRS-specific CL-PC adjustment state is set and TPC accumulation is set), the TPC command for the SRS jointly coded by DCI format 2_3 may be applied as the CL-PC adjustment state of the SRS.

[0103] Regardless of the above case, the UE may also apply a specific CL-PC adjustment state (separate from PUSCH) for SRS, where a new index k={0,1} may be introduced to indicate the SRS-specific CL-PC adjustment state separate from PUSCH.

[0104] In the present disclosure, the values ​​of l and k may be set / indicated for each SRS resource set / SRS resource.

[0105] (Unified TCI state in asymmetric DL sTRP / UL mTRP placement scenario) In the asymmetric DL sTRP / UL mTRP deployment scenario, the applied TCI states (TCI states actually applied to channels / signals) of the unified TCI / inter cell beam management (ICBM) framework in Rel. 17 and the unified TCI framework in Rel. 18 are considered to be repurposed as follows:

[0106] ◆ If Rel.17 Unified TCI / ICBM is set, -◆In FR1, one joint TCI state or one DL TCI state and one UL TCI state is applied. -◆In FR2, one DL TCI state and one UL TCI state apply.

[0107] ◆ If Rel.18 Unified TCI is set, -◆In FR1, up to two joint TCI conditions or one DL TCI condition and up to two UL TCI conditions apply. -◆In FR2, one DL TCI condition and up to two UL TCI conditions apply.

[0108] Thus, only the applied TCI state in the asymmetric DL sTRP / UL mTRP placement scenario was examined, and the relationship with the indicated TCI state is unclear.

[0109] In an asymmetric DL sTRP / UL mTRP deployment (A-HetNet) scenario, there is only one DL TRP and one or more UL TRPs, so there is no need to apply two DL or joint TCI states to DL channels / RSs. Therefore, it is considered to limit the number of TCI indications.

[0110] (Example of a restriction on instruction TCI) In the Rel.18 unified TCI framework, the indicated TCI state and the applied TCI state may be different. Even if two indicated TCI states are indicated by the RRC IE / MAC CE / DCI, one or both of the two indicated TCI states may be selected / applied (as the applied TCI state) by the RRC IE / DCI / rule. As mentioned above, in the translation of the Rel.18 unified TCI framework in the asymmetric DL sTRP / UL mTRP deployment scenario, only the applied TCI is considered.

[0111] In the Rel.18 unified TCI framework, when the joint TCI state mode is configured, a TCI codepoint can be mapped to up to two joint TCI states, both of which can be used for DL ​​channels / signals. However, in the DL in asymmetric DL sTRP / UL mTRP deployment scenarios, an sTRP is assumed. In this case, only one joint TCI state is required for DL. In that case, it is unclear which TCI state will be used.

[0112] If two joint TCI states are indicated, it is considered that the NW can indicate the same two joint TCI states for DL ​​sTRP operation. This may not be a good solution for the following reasons: ◆For DL ​​channels / signals, sTRP operation is assumed, while for UL channels / signals, mTRP operation is supported. ◆If a unified TCI framework is configured based on existing specifications and a UE is instructed to two joint TCI states, and the UE receives a TCI codepoint mapped to the first or second joint TCI state, the UE updates the first or second joint TCI state mapped to that TCI codepoint and maintains the previously instructed first or second TCI state that is not updated by that TCI codepoint. In this case, even if the network can instruct the same two joint TCI states for a certain TCI codepoint, the two joint TCI states may be different after the UE receives another TCI codepoint mapped to a single joint TCI state, and only one of the two joint TCI states is updated while the other joint TCI state remains unchanged.

[0113] As shown in the example of Figure 3, the TCI codepoint "000" is mapped to a first indicated TCI state being joint TCI state #1 and a second indicated TCI state being joint TCI state #1. From the first slot Y symbols after the transmission of a PUCCH with a HARQ-ACK for a DCI containing the TCI codepoint "000", the same joint TCI state #1 as the first and second indicated TCI states is applied to the DL channel / signal. The TCI codepoint "101" is mapped to no first indicated TCI state and a joint TCI state #2 as the second indicated TCI state. From the first slot Y symbols after the transmission of a PUCCH with a HARQ-ACK for a DCI containing the TCI codepoint "101", the first indicated TCI state is maintained, the second indicated TCI state is updated to joint TCI state #2, and joint TCI state #1 and joint TCI state #2 are applied to the DL channel / signal. This results in two different indicating TCI states.

[0114] In this way, when the number of UL TRPs (e.g., 2) is greater than the number of DL TRPs (e.g., 1), the operation regarding the DL TCI state when multiple TCI states are indicated has not been sufficiently considered. If such operation is not sufficiently considered, there is a risk of a decrease in communication quality / throughput.

[0115] Therefore, the present inventors came up with the idea of ​​an operation related to the indication of the TCI state.

[0116] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0117] (Various reading changes) In this disclosure, words enclosed in "()" in a sentence may indicate an explanation of the immediately preceding wording (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Also, in this disclosure, words enclosed in "[ ]" in a sentence may be interpreted including the meaning of the entire sentence, or may be interpreted excluding the meaning of the entire sentence (ignoring the meaning of the entire sentence). Note that "()" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0118] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0119] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be interchangeable. In the present disclosure, terms such as support, control, controllable, operate, and operate may be interchangeable.

[0120] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0121] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0122] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0123] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0124] In the present disclosure, single TRP, channel / signal using single TRP, channel using one TCI state, multi-TRP not enabled by RRC / DCI, multiple TCI states not enabled by RRC / DCI, no single CORESETPoolIndex value configured for any CORESET, and no codepoint in the TCI field mapped to two TCI states may be read interchangeably.

[0125] In the present disclosure, multi-TRP, channel / signal using multi-TRP, channel using multiple TCI states, multi-TRP enabled by RRC / DCI, multiple TCI states enabled by RRC / DCI, and at least one of multi-TRP based on a single DCI and multi-TRP based on multiple DCI may be read as interchangeable.

[0126] In the present disclosure, the terms TCI, TCI state, TCI state ID, TCI state list / set / pool / group, and TCI state list / set / pool / group ID may be interchangeable. The terms TCI and UL / Joint TCI may be interchangeable.

[0127] The UL reception point may be connected to a TRP (e.g., a base station) or a core network via wired or wireless connections. The UL reception point may be treated as a network (NW) or a base station. The UL reception point may be capable of transmitting downlink (DL) signals (e.g., PL values) and may be applied to base stations forming a macrocell. For example, the UL reception point may not transmit downlink data but may transmit control signals / channels.

[0128] In this disclosure, the terms base station, TRP, UL receiving point, UL TRP, UL only TRP, micro cell, micro BS, and micro TRP may be interchangeable. An UL receiving point primarily performs UL reception. An UL receiving point may perform only UL reception, or may perform UL reception and DL transmission.

[0129] In this disclosure, the terms base station, TRP, DL transmission point, DL TRP, DL only TRP, UL / DL TRP, macro cell, macro BS, macro TRP, and central TRP may be interchangeable. A DL transmission point primarily performs DL transmission. A DL transmission point may perform only DL transmission, or may perform UL reception and DL transmission.

[0130] The gNB (base station) in the present disclosure may be a DL transmission point or a UL reception point, or may be a base station above a DL transmission point or a UL reception point (capable of communicating with a DL transmission point / UL reception point).

[0131] (Wireless communication method) <Analysis> The number of indicated TCI states may not be limited. The indication of the unified TCI state may be based on at least one of the following indications: ◆ In Rel.17 unified TCI states, one joint TCI state or one DL TCI state and one UL TCI state may be indicated. ◆ In the Rel.18 unified TCI states, one or two joint TCI states, or one DL TCI state and one or two UL TCI states may be indicated.

[0132] In the Rel.18 unified TCI state, after two TCI states are indicated, even if the gNB indicates one TCI state, the UE may maintain the two indicated TCI states.

[0133] In the Rel.18 unified TCI states, which one of the two indicated TCI states is applied may be determined by RRC configuration (e.g., applyIndicatedTCIState), by rules defined in the specification, or by DCI indication (e.g., TCI selection field / SRI field).

[0134] <Embodiment 0> Even if two DL or joint TCI states are specified, the gNB may specify the application of one DL or joint TCI state. In this case, there is no problem in reusing the current specification (the unified TCI framework of Rel. 17 / 18).

[0135] According to embodiment 0, even if two DL or joint TCI states are indicated, the UE can apply the appropriate indicated TCI state to DL reception if it is instructed to apply one DL or joint TCI state.

[0136] <Analysis> The following steps for applying the indication TCI state to the PDSCH in the above-mentioned "Application of indication TCI in Rel. 18" are not clear. -◆For a PDSCH scheduled / activated by DCI format 1_1 / 1_2, the 2-bit TCI selection field in the scheduling / activation DCI format 1_1 / 1_2 can indicate which indication TCI state {first TCI state, second TCI state, both} applies. If the TCI selection field is not set, both indication TCI states apply.

[0137] <Embodiment 1> When new RRC parameters (or new RRC IEs, new settings) are configured [in Rel. 19 and later], at least one of the following UE behaviors may be added: ◆If a UE has a PDSCH scheduled / activated by DCI format 1_1 / 1_2 and the TCI selection field is present in the DCI (tciSelection-PresentInDCI) is not set, the UE selects / applies the first (or second) DL or joint indication TCI state for the scheduled / activated PDSCH. ◆ If the TCI selection field is present in the DCI (tciSelection-PresentInDCI) is not set, the UE selects / applies the first (or second) DL or joint indicated TCI state for DL ​​(DL channel / signal, PDCCH / PDSCH / CSI-RS) reception.

[0138] If the new RRC parameters are not configured, the UE may fall back to the existing specifications (Rel.17 / Rel.18) [for the application of one or more indication TCI states].

[0139] The new RRC parameters may be parameters that enable a feature [of the UE behavior], parameters that enable an A-HetNet scenario, parameters to apply / enable more than one (e.g., two) TCI states / TRPs / transmissions for the UL, or a repurposed parameter that enables at least one of the following features: ◆ PL offset setting for TCI state. ◆Two closed loop (CL)-power control (PC) adjustment states for SRS, separate from the PUSCH closed loop (CL)-PC adjustment state.

[0140] In the above case 1 or case 2 when the UE has dl-OrJointTCI-StateList configured and has two indicated TCI states, at least one of the above procedures 1 to 3 and some of the following procedures Ax may be defined in the specification.

[0141] -◆Step A1 If the UE is not configured with new RRC parameters, if the UE is not configured with tciSelection-PresentInDCI and if the UE receives DCI format 1_1 / 1_2 that schedules or activates PDSCH reception, the UE applies both indicated TCI states [of the two indicated DL / joint TCI states] to the scheduled or activated PDSCH reception.

[0142] -◆Step A2 If the UE is configured with new RRC parameters, if the UE is not configured with tciSelection-PresentInDCI and if the UE receives DCI format 1_1 / 1_2 that schedules or activates PDSCH reception, the UE applies the first indicated TCI state [of the two indicated DL / joint TCI states] to the scheduled or activated PDSCH reception.

[0143] As shown in the example of Figure 4, the TCI code point "000" is mapped to a first indicated TCI state being joint TCI state #1 and a second indicated TCI state being joint TCI state #1. From the first slot Y symbols after the transmission of the PUCCH having the HARQ-ACK for the DCI including the TCI code point "000", the first indicated TCI state, joint TCI state #1, is applied to the DL channel / signal based on procedure A2. The TCI code point "101" is mapped to no first indicated TCI state and a second indicated TCI state being joint TCI state #2. From the first slot Y symbols after the transmission of the PUCCH having the HARQ-ACK for the DCI including the TCI code point "101", the first indicated TCI state is maintained, the second indicated TCI state is updated to joint TCI state #2, and the first indicated TCI state, joint TCI state #1, is applied to the DL channel / signal based on procedure A2. This allows the UE to select one TCI state and apply it appropriately to the DL channel / signal, even if two TCI states are indicated.

[0144] According to embodiment 1, even if two DL or joint TCI states are indicated, the UE can apply the appropriate indicated TCI state to DL reception.

[0145] <Embodiment 2> In an A-HetNet scenario, it may not be necessary to indicate the first or second or both DL or joint TCI states for the PDSCH. If a UE is configured with the new RRC parameters [of embodiment 1], the specification may specify that the UE does not expect / assume that the TCI selection field in the DCI (tciSelection-PresentInDCI) is configured.

[0146] In an A-HetNet scenario, there may be no case where the gNB indicates the TCI status of both DL or joint for PDSCH / PDCCH. When the UE is configured with the new RRC parameters [of embodiment 1], the UE may operate based on at least one of the following procedures Bx. ◆ Step B1: The UE does not expect / assume that it will be instructed on both DL or joint TCI states for PDSCH / PDCCH. ◆ Step B2: The UE does not expect / assume that an SFN scheme PDCCH (sfnSchemePdcch) or an SFN scheme PDSCH (sfnSchemePdsch) will be configured.

[0147] In an A-HetNet scenario, the specifications may restrict PDSCH / PDCCH / CSI-RS to indicate only the first DL or joint TCI state. If a UE is configured with the new RRC parameters [of embodiment 1], the UE may operate based on at least one of the following procedure Cx / variations:

[0148] ◆ Step C1: The UE does not expect / assume that the second or both DL or joint TCI states for PDSCH / PDCCH / CSI-RS are indicated by an existing RRC configuration (eg applyIndicatedTCIState). - ◆ Variation: The UE only expects / assumes that the first DL or joint TCI state is indicated for PDSCH / PDCCH / CSI-RS by the existing RRC configuration (e.g. applyIndicatedTCIState). - ◆ Variation: The UE ignores the existing RRC configuration (e.g., applyIndicatedTCIState) and always applies the first DL or joint TCI state to PDSCH / PDCCH / CSI-RS.

[0149] ◆ Step C2: The UE only expects / assumes that the TCI selection field indicates that the first DL or joint TCI state should be applied to the PDSCH. -◆The UE may expect that tciSelection-PresentInDCI is always set.

[0150] According to the second embodiment, in an A-HetNet scenario, the UE can apply an appropriate indication TCI state to the reception of DL (PDSCH / PDCCH / CSI-RS).

[0151] <Embodiment 3> When a UE is configured with the new RRC parameters [of embodiment 1], the UE may operate based on at least one of the following characteristics.

[0152] ◆Feature: The QCL information (e.g., QCL source RS) is the same in the first DL or joint indicated TCI state and the second DL or joint indicated TCI state. Alternatively, the QCL source RS has a QCL type D relationship in those two TCI states. Even if two DL or joint TCI states are indicated, the two DL or joint TCI states may be the same when they apply to DL channels / signals.

[0153] ◆Feature: The UE may be indicated by the RRC IE / MAC CE / DCI to be in at least one of the following TCI states: -◆In FR1, up to two joint TCI states or one DL TCI state and up to two UL TCI states. -◆In FR2, one DL TCI state and up to two UL TCI states.

[0154] ◆Feature: The UE does not have to expect / assume that at least one of the TCI field and the TCI selection field is present in DCI format 1_1 / 1_2.

[0155] <Supplementary Note> <<Notification of Information to UE>> The notification of any information from [a network (Network (NW)) (e.g., a base station (Base Station (BS)))] to a UE in the above-described embodiment (or in other words, the reception of any information from the BS by the UE) may be performed using physical layer signaling (e.g., DCI), upper layer signaling (e.g., RRC signaling, MAC CE, RRC message, LTE positioning protocol (LPP) message), a specific signal / channel (e.g., DCI, PDCCH, PDSCH, reference signal), or a combination thereof.

[0156] When the above notification is performed by a MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) that is not defined in the existing standard in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be one obtained by introducing a new octet into an existing MAC CE.

[0157] When the above notification is performed by DCI, the above notification may be performed by a specific field of the DCI, a radio network temporary identifier (Radio Network Temporary Identifier (RNTI)) used for scrambling cyclic redundancy check (Cyclic Redundancy Check (CRC)) bits assigned to the DCI, the format of the DCI, etc. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0158] In addition, the notification of any information to the UE in the above-described embodiments may be performed periodically, semi-persistently (triggered by the UE or gNB), or aperiodically (triggered by the UE or gNB).

[0159] In the above-described embodiments, the UE may receive at least one piece of information (QCL information) among the following several QCL rules / QCL types from the NW. ◆QCL type A (Doppler shift, Doppler spread, average delay, and delay spread) ◆QCL type B (Doppler shift and Doppler spread) ◆QCL type C (Doppler shift and average delay) ◆QCL type D (Spatial reception parameters)

[0160] In the above-described embodiments, the QCL source RS for each QCL type may be at least one of the following several RSs. ◆SSB ◆CSI-RS with / without repetition ◆TRS ◆DMRS of PDCCH / PDSCH

[0161] In the above-described embodiments, the information from the NW may be set / instructed by the following methods. ◆Common to multiple UEs or UE-specific ◆Cell-specific or common to multiple cells ◆Per UE / Per CC / Per BWP / Per band / Per cell / Per cell group (CG)

[0162] <<Notification of Information from UE>> In the above-described embodiments, notification of any information from the UE [to the NW] (in other words, transmission / reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC message, LPP message), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0163] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID in the MAC subheader that is not defined in existing standards. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an extension of an existing MAC CE by introducing a new octet.

[0164] If the notification is performed by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0165] In addition, notification of any information from the UE in the above embodiments may be periodic, semi-persistent (triggered by the UE or the gNB), or aperiodic (triggered by the UE or the gNB).

[0166] <<Application of each embodiment>> In a UE / BS, the specific process / operation / control / assumption / information(s) of at least one of the above-described embodiments may be applied (used) when one or more of the following conditions are met: ◆ Upper layer parameters indicating the above specific processing / operation / control / assumment / information are set. ◆The above specific processing / action / control / assuming / information is determined based on the relevant upper layer parameters, ◆The above specific processing / action / control / assuming / information is specified / activated / triggered by MAC CE / DCI / UCI / resource / channel / RS, Reporting or supporting specific UE capabilities that indicate (or relate to) the specific processes / operations / controls / assumptions / information mentioned above; ◆The application of the above specific processing / action / control / assumption / information is determined based on specific conditions.

[0167] The specific UE capabilities may indicate at least one of the following: ◆Supporting the above specific processing / action / control / assuming / information, ◆ Capabilities of each embodiment. * Capabilities of each option in each embodiment, or capabilities of a combination of multiple options in each embodiment. ◆The capabilities of each option in each embodiment, or the capabilities of a combination of multiple options in each embodiment. ◆Support asymmetric DL sTRP / UL mTRP (A-HetNet). ◆Supporting new RRC parameters.

[0168] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or a capability for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), or a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC), or a capability for each functionality / model.

[0169] Furthermore, the specific UE capability may be a capability that is applied across all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0170] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0171] Information on whether one or more of the above embodiments / options / choices / examples apply / are used, or which of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆The information is configured by one or more higher layer parameters / RRC IEs. ◆The information is determined by one or more relevant higher layer parameters / RRC IEs. ◆The information is indicated by the MAC CE / DCI. The information is based on one or more UE capabilities. ◆The information is described / defined in the specification. ◆The information is based on the conditions described / defined in the specification. ◆The information is determined by a combination of several pieces of information above. For example, the information is determined by upper layer parameters / MAC CE / DCI settings / indications and reported by UE capabilities.

[0172] The above embodiments / options / choices may be combined into one embodiment / option / choice.

[0173] In the above embodiments, the RS to be measured may be a QCL source RS in an active TCI state / indicated / unified TCI state.

[0174] (Addendum) The following inventions are noted with respect to the embodiments of the present disclosure. [Appendix 1] a receiver that receives a configuration for applying two transmission configuration indication (TCI) states for an uplink and receives information indicating two TCI states for a downlink or joint; a control unit that applies one of the two indicated TCI states to downlink reception. [Appendix 2] the receiving unit receives downlink control information for scheduling or activating a physical downlink shared channel; The terminal described in Supplementary Note 1, wherein, if the presence of a TCI selection field is not set in the downlink control information, the control unit applies one TCI state of the two indicated TCI states to reception of the physical downlink shared channel. [Appendix 3] the receiving unit receives downlink control information for scheduling or activating a physical downlink shared channel; 3. The terminal according to claim 1 or 2, wherein the presence of a TCI selection field in the downlink control information is not configured. [Appendix 4] A terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the two pieces of quasi co-location (QCL) information contained in the two indicated TCI states are the same.

[0175] (wireless communication system) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0176] 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0177] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0178] 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.

[0179] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0180] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The location, number, shape, size, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0181] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a super cell) may be composed of multiple [virtual] cells (which may be called, for example, sub-cells). A super cell may correspond to a cell whose physical range is fixed, and a sub-cell may correspond to a cell whose physical range varies semi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0182] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0183] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.

[0184] Furthermore, the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0185] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 / Xn interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0186] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0187] The core network 30 may include network functions (NFs) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and an Operation, Administration and Maintenance (Management) (OAM). Note that a single network node may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0188] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0189] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0190] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0191] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0192] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0193] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0194] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0195] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0196] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0197] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0198] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0199] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0200] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted as DL-RS.

[0201] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0202] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0203] (base station) 6 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0204] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0205] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0206] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0207] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0208] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0209] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0210] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0211] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0212] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0213] The transceiver 120 (transmission processor 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0214] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0215] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0216] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0217] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0218] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NFs), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0219] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0220] The base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU). For example, the RU may perform RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may perform higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may perform PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0221] In the present disclosure, the base station 10 may include a single device that implements all of the functions of the RU, DU, and CU, or may include multiple devices that each implement some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably read as RU / DU / CU.

[0222] The transceiver 120 may transmit a configuration for applying two transmission configuration indication (TCI) states for the uplink and may transmit information indicating two TCI states for the downlink or joint. The controller 110 may apply one of the indicated two TCI states to the downlink transmission.

[0223] (user terminal) 7 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0224] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0225] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0226] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0227] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured from a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0228] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0229] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0230] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0231] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0232] The transceiver 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0233] The transceiver 220 (transmission processor 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0234] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0235] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0236] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0237] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0238] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0239] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0240] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0241] The transceiver 220 may receive a configuration for applying two transmission configuration indication (TCI) states for the uplink and may receive information indicating two TCI states for the downlink or joint. The controller 210 may apply one of the indicated two TCI states to downlink reception.

[0242] The transceiver 220 may receive downlink control information for scheduling or activating a physical downlink shared channel. If the presence of a TCI selection field in the downlink control information is not set, the controller 210 may apply one of the two indicated TCI states to reception of the physical downlink shared channel.

[0243] The transceiver 220 may receive downlink control information for scheduling or activating a physical downlink shared channel, and the presence of a TCI selection field in the downlink control information may not be configured.

[0244] The two pieces of quasi co-location (QCL) information included in the two indicated TCI states may be the same.

[0245] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0246] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0247] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0248] In the present disclosure, terms such as apparatus, circuit, device, section, and unit may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0249] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0250] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0251] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0252] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0253] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0254] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0255] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0256] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0257] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0258] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0259] Note that the devices included in the core network 30 (for example, network nodes that provide NFs) may also be realized by the above-described functional block / hardware configuration.

[0260] (Variation) Note that terms explained in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0261] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0262] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0263] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0264] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0265] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0266] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0267] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0268] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0269] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0270] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0271] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0272] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0273] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0274] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0275] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0276] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0277] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0278] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0279] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0280] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0281] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0282] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0283] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0284] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0285] With respect to any information (e.g., variables, constants, parameters) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., UE / base station) may notify any second device (e.g., base station / UE) of information indicating / identifying (or relating to) the value of the any information.

[0286] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0287] Note that the physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be called an RRC message, such as an RRC connection setup message or an RRC connection reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0288] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0289] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0290] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0291] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0292] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0293] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0294] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. The spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0295] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0296] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0297] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0298] Furthermore, in this disclosure, terms such as "QCL," "QCL assumptions," "QCL relationships," "QCL type information," "QCL properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0299] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0300] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interchangeable. "Spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and TCI may be interchangeable. The spatial relationship information and spatial relationship may be interchangeable.

[0301] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0302] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0303] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0304] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0305] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0306] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0307] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0308] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0309] 9 is a diagram showing an example of a vehicle according to an embodiment. Vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0310] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0311] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0312] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0313] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0314] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0315] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), Artificial Intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0316] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0317] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0318] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0319] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0320] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0321] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0322] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0323] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0324] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the specific order presented.

[0325] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0326] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0327] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0328] The term "determining," as used in this disclosure, may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0329] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0330] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0331] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0332] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...," "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ...," "does not ... (if the above "..." is a to-infinitive, a verb with "to")," etc. Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0333] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0334] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0335] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0336] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0337] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0338] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0339] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with the prefix "i-th" (i is any integer) (for example, "highest" may be interchangeable as "i-th highest").

[0340] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0341] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions, such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be nearly zero (immediately after or immediately before). A time offset may be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after the time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0342] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0343] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.< / srs> < / pusch> < / pucch> < / pdsch> < / pdcch> < / srs> < / pusch> < / pucch> < / pdsch> < / pdcch> < / srs> < / pusch> < / pucch> < / pdsch> < / pdcch>

Claims

1. a receiver for receiving a configuration for applying two transmission configuration indication (TCI) states for an uplink and for receiving information indicating two TCI states for a downlink or joint; A terminal having a control unit that applies one of the two indicated TCI states to downlink reception.

2. the receiving unit receives downlink control information for scheduling or activating a physical downlink shared channel; 2. The terminal according to claim 1, wherein, when a TCI selection field is not set to be present in the downlink control information, the control unit applies one TCI state of the two indicated TCI states to reception of the physical downlink shared channel.

3. the receiving unit receives downlink control information for scheduling or activating a physical downlink shared channel; The terminal of claim 1 , wherein a TCI selection field is not configured to be present in the downlink control information.

4. The terminal according to claim 1 , wherein the two pieces of quasi co-location (QCL) information included in the two indicated TCI states are the same.

5. receiving a configuration for applying two transmission configuration indication (TCI) states for an uplink; receiving information indicating two TCI states for a downlink or joint; and applying one of the two indicated TCI states to downlink reception.

6. a transmitter that transmits a configuration for applying two transmission configuration indication (TCI) states for an uplink and transmits information indicating two TCI states for a downlink or joint; a control unit that applies one of the two indicated TCI states to downlink transmission.

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