Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives a configuration of a cluster of a plurality of transmission / reception points; and a control unit that applies at least one of quasi co-location (QCL) assumption and a spatial domain filter to at least one of receiving and transmitting on the basis of conditions related to the configuration.

Description

Terminal, wireless communication method and base station

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

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

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

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

[0005] In future wireless communication systems (e.g., NR, 6G, etc.), it is being considered that terminals (user terminals, User Equipment (UE)) will communicate using unit areas (e.g., more transmission / reception points (TRPs) / access points (APs)) that are different from existing cells.

[0006] However, specific consideration of such communications has not been sufficient, and if consideration is insufficient, there is a risk that improvements in communication quality / communication throughput may be hindered.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that perform appropriate communication by utilizing a unit area different from existing cells.

[0008] A terminal according to one aspect of the present disclosure has a receiving unit that receives a configuration of a cluster of multiple transmitting and receiving points, and a control unit that applies at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of reception and transmission based on conditions related to the configuration.

[0009] According to one aspect of the present disclosure, appropriate communication can be performed by utilizing a unit area different from existing cells.

[0010] 1A-1C show examples of cell-free configuration assumptions. FIG. 2 shows an example of a TCI state in assumption A. FIG. 3 shows an example of a TCI state in assumption B. FIGS. 4A and 4B show an example of behavior according to option 2-1 of embodiment 1. FIG. 5 shows an example of a source RS and an UL Tx spatial domain filter based on definition 1 of embodiment 2. FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 7 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 8 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 9 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. FIG. 10 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (Cell-free) Existing wireless communication systems (e.g., 5G NR) have adopted a cellular system in which one cell is formed by one antenna / TRP. The area formed by the cell is fixed / static.

[0012] In addition, existing wireless communication systems (e.g., Rel. 16 and later) have introduced distributed multi-input multi-output (Distributed MIMO, e.g., multi-TRP using multiple transmission / reception points (TRPs)), which form a communication area using the coverage of multiple antennas / TRPs. Distributed MIMO allows simultaneous communication using multiple antennas / TRPs and communication using one antenna / TRP.

[0013] By adopting distributed MIMO, it is possible to create a more favorable line-of-sight environment and improve MIMO performance.

[0014] In co-located MIMO, one UE communicates with one antenna / TRP.

[0015] On the other hand, in distributed MIMO, one UE communicates with multiple antennas / TRPs in coordination.

[0016] In future wireless communication systems (e.g., Rel. 20 and later), the introduction of cell-free communication is being considered with the aim of further improving performance and energy efficiency through reducing interference between multiple antennas / TRPs, creating a line-of-sight environment for high-frequency use, improving frequency utilization efficiency throughout the system, and applying equal, high-quality communication to each user.

[0017] Self-Free may also be referred to as cell-free massive MIMO (mMIMO) or large-scale distributed MIMO (D-MIMO). Self-Free uses coherent cooperation of multiple access points. Self-Free may include at least one of ultra-dense deployment, scalable cooperation, user-centric clustering, super-carrier aggregation, and analog fronthaul. The user plane for cell-free may perform more flexible scheduling than existing scheduling. The control plane for cell-free may maintain some form of cell to facilitate signaling.

[0018] In cell-free, unlike conventional cellular systems, one area (which may be called a cell / sub-cell, etc.) may be formed by multiple antennas / TRPs. In other words, the area may mean a cell that does not depend on the position of the antenna.

[0019] In cell-free, the set of antennas / TRPs used to form a coverage area may be changed according to the needs of UEs. For example, the set of antennas / TRPs may be changed based on the number of UEs, the number of traffic, communication purposes (e.g., initial access, data communication, measurement, reporting, etc.), etc., rather than the coverage of the antennas / TRPs.

[0020] In other words, in cell-free, the coverage between multiple antennas / TRPs may overlap.

[0021] In cell-free mode, the direction in which a synchronization signal (which may also be called, for example, a synchronization signal block (SSB), a synchronization signal / physical broadcast channel (SS / PBCH) block, etc.) is transmitted may be controlled for each antenna / TRP.

[0022] In addition, in cell-free, a central unit (CU) / distributed unit (DU) may be virtualized for each antenna / TRP, or each antenna / TRP may be managed by only the CU.

[0023] In existing cellular systems, each antenna / TRP forms a cell, and UEs communicate based on that cell.

[0024] On the other hand, in a cell-free system, an installed antenna / TRP does not form a fixed / static cell as in a cellular system. For example, in a cell-free system, one or more antennas / TRPs form a condition-dependent area. Therefore, in a cell-free system, each antenna / TRP may not correspond to the same physical cell ID, and the areas between multiple antennas / TRPs may overlap.

[0025] Self-regulation may be achieved, for example, by coordinating a set of antennas / TRPs controlled by a central control unit (e.g., CU).

[0026] In a cell-free system, a first cell (e.g., may be referred to as a cell / super cell / macro cell / large cell, etc.) with a fixed physical range like a cell in a 5G NR system, and a second cell (e.g., may be referred to as a subcell / area / micro cell / cell / small cell / second cell within the first cell, etc.) with a quasi-static / dynamic physical range that varies based on conditions may be formed. For example, the first cell may be referred to as a supercell to distinguish it from the second cell. When a supercell is composed of multiple second cells, the second cells may have the same definition / operation / coverage as existing cells in NR. For example, the second cells may be referred to as subcells to distinguish them from the first cell. When a supercell or a cell is composed of multiple subcells, the subcells may have the same definition / operation / coverage as existing cells in NR.

[0027] The first cell may be a cell that is newly defined in a future wireless communication system, or may be a cell defined in an existing wireless communication system that is reused.

[0028] The configurations of the first cell and the second cell can be considered as follows: Assumption 1 and Assumption 2: The first cell is composed of multiple TRPs with one cell ID (physical cell ID (PCI)). The multiple TRPs can transmit and receive in coordination. Assumption 2: The first cell is composed of multiple TRPs (or sub-cells) with different cell IDs. The multiple TRPs / sub-cells can transmit and receive in coordination.

[0029] 1A shows an example of a cell-free configuration scenario 1. In this example, each TRP included in a first cell (supercell / cell) has the same PCI (PCI #0). Multiple TRPs can communicate cooperatively with one UE.

[0030] Figure 1B shows an example of cell-free configuration scenario 2. In this example, each TRP included in the first cell (super-cell / cell) has a different PCI (PCI #0 to #9). Multiple TRPs can communicate cooperatively with one UE.

[0031] Figure 1C shows an example of a variation of Assumption 2 of the cell-free configuration. In this example, a PCI is assigned to each TRP included in the first cell (supercell / cell). In this variation of Assumption 2, unlike Assumption 2, the same PCI may correspond to multiple TRPs. Multiple TRPs can communicate cooperatively with one UE. Multiple TRPs associated with the same PCI may be included in one cell.

[0032] Transmission / reception with TRP / subcell coordination may be based on at least one of the following schemes supported in NR: * Transmission of a single TRP / subcell with dynamic TRP / subcell switching (single-TRP transmission). * Joint transmission using multiple TRPs / subcells (multi-TRP joint transmission). The joint transmission may be based on a single DCI or multiple DCIs. The joint transmission may be non-coherent joint transmission (NCJT) or coherent joint transmission (CJT).

[0033] For cell-free, assuming ideal backhaul and tight coordination, in the joint transmission scheme, CJT may be prioritized over NCJT, and single DCI-based joint transmission may be prioritized over multi-DCI-based joint transmission.

[0034] Cell-Free Scenarios / Definitions / Concepts Cell-free scenarios / definitions / concepts may include MIMO and mobility evolution.

[0035] The evolution of MIMO from single-point MIMO to multi-TRP (NCJT / CJT / coordinated scheduling / coordinated beamforming (CSCB) / dynamic point selection (DPS)) and the evolution of mobility from layer 3 (L3) mobility to L2 mobility (LTM) may further evolve to D-MIMO, lower layer mobility, and flexible TRP clustering (high-density TRP, clustering of cells / TRPs for mobility, control and data may be separated).

[0036] Selfry may include at least one of the following features: ◆ Denser TRP placement (per cell), which can achieve better SNR for all UEs, including those in traditional cell edge areas. ◆ Flexible (e.g., UE-centric) TRP clustering for cell construction, which can reduce the impact of interference between multiple cells / TRPs on UEs. ◆ Low layer mobility, which can consider more TRPs within a single clustering, enabling seamless mobility through L1 level operation.

[0037] Selfie may include at least one of several concepts:

[0038] ◆ Concept 1: Selection / transmission of multiple TRPs / APs is performed for data only (physical (PHY) / MAC layer). There is no significant impact on the specifications regarding cell selection, initial access, and mobility. Existing LTMs may be reused or extended. The main impact on the specifications is the extension of L1 measurement / reporting or SRS transmission for selection of multiple TRPs / APs, and the extension of CSI measurement / reporting or SRS transmission for CSI of clustering of TRPs / APs (different from their selection), etc.

[0039] ◆ Concept 2: Selection / transmission of multiple TRPs / APs for both control (RRC) and data. There are impacts to the specifications regarding cell selection, initial access, and mobility, in addition to L1 / CSI for data in Concept 1. For example, the UE may need to access multiple TRPs / APs in initial access, and SSB / SI / RACH may be redesigned. The clustering of multiple TRPs / APs for control and data may be the same or different. There may be impacts to the specifications in the case of clustering more than one DU / CU that are not geographically co-located.

[0040] In another aspect, CCs within different frequencies (CA scenarios) may be considered, and multiple TRPs / APs may be processed separately for each CC or jointly across multiple CCs (e.g., clustering and scheduling may jointly consider the TRP dimension and the CC dimension).

[0041] (Unified / Common TCI Framework) The unified TCI framework allows multiple types of channels / RSs (UL / DL) to be controlled by a common framework. The unified TCI framework does not specify TCI states or spatial relationships for each channel as in Rel. 15. Instead, 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.

[0042] One beam for both DL and UL (one joint TCI state), or one beam for DL ​​and one beam for UL (two separate TCI states, DL TCI state and UL TCI state) are considered.

[0043] The unified TCI framework supports the following modes 1 to 3: <<Mode 1>> MAC CE based TCI state indication <<Mode 2>> DCI based TCI state indication by DCI format 1_1 / 1_2 with DL assignment <<Mode 3>> DCI based TCI state indication by DCI format 1_1 / 1_2 without DL assignment

[0044] Note that the DCI in the above-mentioned mode 2 / mode 3 may be referred to as beam instruction DCI.

[0045] In the present disclosure, the terms "DCI-indicated TCI state," "indicated TCI state," "indicated TCI state," "unified TCI state," "TCI state applied to multiple types of channels / signals," "joint TCI state for DL ​​and UL," "DL TCI state," "UL TCI state," "Rel. 17 TCI state," "common TCI state," "configured single unified TCI state," and "activated single unified TCI state" may be read interchangeably.

[0046] In the present disclosure, the terms TCI state set by RRC parameters, configured TCI state, set TCI state, TCI state that does not conform to the unified TCI state, TCI state other than the unified TCI state, TCI state / spatial relationship set for a specific channel / signal, and individual TCI state may be read interchangeably.

[0047] Beam correspondence is the ability of a UE to select an appropriate beam for UL transmission based on DL measurements with or without UL beam sweeping. The beam correspondence requirement is met if the UE uses an autonomously selected UL beam and meets the minimum peak EIRP and spherical coverage requirements for its power class without UL beam sweeping.

[0048] <Known Conditions for DL ​​TCI State> If the RS resource for layer 1 (L1)-RSRP measurement is an RS in the target DL TCI state (the DL TCI state applied after switching, the DL TCI state indicated by the switching instruction) or is QCL'd with the target DL TCI state, and the following conditions are met during the period from the last transmission of the RS resource used for L1-RSRP measurement report for the target DL TCI state to the completion of the active DL TCI state switch, the DL TCI state is known: - A DL TCI state switch command is received within 1280 ms from the last transmission of the RS resource for beam reporting or measurement. - Prior to the TCI state switch command, the UE has transmitted at least one L1-RSRP report for the target DL TCI state. - The target DL TCI state remains detectable during the DL TCI state switching period. - The SSB associated with the DL TCI state remains detectable during the DL TCI state switching period. - The SNR of the DL TCI state is ≥ 3 dB. - The SSB can be associated with the serving cell PCI or a PCI different from the serving cell PCI.

[0049] If the condition is not met, the DL TCI state is unknown.

[0050] (TCI condition, QCL assumption) In the existing specifications, the following four quasi co-location (QCL) types are defined: QCL Type A (Doppler shift, Doppler spread, mean delay and delay spread) QCL Type B (Doppler shift and Doppler spread) QCL Type C (Doppler shift and mean delay) QCL Type D (spatial reception parameters)

[0051] Several DL channel / signal and QCL type combinations can be used:

[0052] ◆ The TCI state for periodic (P)-tracking reference signal (TRS) (P-CSI-RS resources in the NZP-CSI-RS-ResourceSet with trs-Info configured) indicates one of several QCL types: ◆ Type C and Type D with SSB. ◆ Type C with SSB and Type D with CSI-RS with repetition.

[0053] The TCI state for aperiodic (AP)-TRS indicates one of several QCL types: - Type A and Type D with P-TRS.

[0054] ◆The TCI state for CSI-RS with repetition exhibits one of several QCL types: ◆Type A and Type D using TRS. ◆Type A using TRS and Type D using CSI-RS with repetition. ◆Type C and Type D using SSB.

[0055] ◆The TCI state for CSI-RS without repetition indicates one of several QCL types: ◆Type A and Type D with TRS. ◆Type A with TRS and Type D with SSB. ◆Type A with TRS and Type D with CSI-RS with repetition. ◆Type B with TRS (Type D is not applicable).

[0056] ◆ The TCI state for a PDCCH / PDSCH that does not have a unified TCI state set indicates one of several QCL types: ◆ Type A and Type D using TRS. ◆ Type A using TRS and Type D using CSI-RS with repetition. ◆ Type A and Type D using CSI-RS without repetition (not TRS).

[0057] ◆ The TCI state for a PDCCH / PDSCH configured with the unified TCI state indicates one of several QCL types: ◆ Type A and Type D using TRS. ◆ Type A using TRS and Type D using CSI-RS with repetition.

[0058] For the UL transmit (Tx) spatial filter, the following several RSs can be used: ◆ SSB / CSI-RS / SRS can be configured / indicated as the [QCL] source RS for determining the UL Tx spatial filter. ◆ If the joint TCI state is configured, SSB / CSI-RS is applicable as the [QCL] source RS for determining the UL Tx spatial filter.

[0059] (Issues) There are two possible scenarios for the RSs of the DL in the cell-free / TRP clustering scenario: ◆ Scenario A: RSs in all possible cell clusters are always transmitted. ◆ Scenario B: Only RSs in the active cell cluster are transmitted.

[0060] Scenario A may cause higher DL RS overhead because DL RS in all cells need to be transmitted. To avoid this overhead, scenario B may be an option with UE assistance. UE assistance may be, for example, SRS-based clustering decisions and synchronization across multiple TRPs.

[0061] If TRP clustering is configurable, the TCI state (spatial domain filter) actually applied to the DL / UL signals / channels [including RS] [under assumption B] can be changed for each configuration / reconfiguration / instruction.

[0062] For multiple TRP clusters, the QCL assumptions (TCI states) for DL ​​given by the [QCL] source RS may be different.

[0063] For multiple TRP clusters, the UL Tx spatial filters (TCI states) derived by referencing the DL RS may be different.

[0064] Figure 2 shows an example of the TCI state in scenario A. In cell A, the QCL source RS of QCL type A for CSI-RS, PDCCH, and PDSCH is TRS, and the QCL source RS of QCL type C for the TRS is SSB. In cell A, the DL RS (QCL source RS) for the TCI state is always the same (always transmitted periodically). The characteristics of the DL RS for the TCI state of cell A are maintained.

[0065] Figure 3 shows an example of the TCI state in scenario B. Cell A [contained in a TRP cluster] may be turned on / off or changed. The characteristics of the DL RS for the TCI state of cell A may change or become unavailable.

[0066] Thus, the method for determining the TCI state / QCL assumption / spatial filter [source RS for] in cell-free / TRP clustering has not been thoroughly considered, which may result in degradation of communication quality / throughput.

[0067] Therefore, the inventors have studied methods for determining the TCI state / QCL assumption / spatial filter and have conceived the following embodiments.

[0068] 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.

[0069] (Various Reinterpretations) In the present disclosure, a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Furthermore, in the present disclosure, a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding (ignoring) the word in the meaning of the entire sentence. Note that "( )" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0070] 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."

[0071] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0076] In the present disclosure, ceil(x), ceiling function, and ceiling function may be interchangeable. In the present disclosure, floor(x), floor function, and floor function may be interchangeable. In the present disclosure, sqrt(x), square root of x, and root x may be interchangeable. In the present disclosure, x mod y, mod(x, y), mod function, and modulo operation may be interchangeable. In the present disclosure, Σ i=M M+N-1 f(i),Σ i=M M+N-1 f i , f(i) or f(i) for i=M, M+1, ..., M+N-1 i summation, f(M)+f(M+1)+...+f(M+N-1), f M +f M+1 +...+f M+N-1 , may be read interchangeably. C(n, k) is the number of combinations of selecting k values ​​from n values ​​(combinatorial coefficient), binomial coefficients, n Ck , C n k , may be read as interchangeable. In the present disclosure, x / / y and floor(x / y) may be read as interchangeable.

[0077] In this disclosure, A b , A_b, Ab, and A with b added to the bottom right may be read interchangeably. c , A^c, and the notation of A with c added to the upper right may be read interchangeably. b c , A_b^c, and the notation in which b is added to the bottom right of A and c is added to the top right of A may be read interchangeably. ~ may be expressed by adding 〜 to the x, or may be referred to as x tilde. - may be represented by placing a - on top of the x, or may be referred to as an x-bar. ＾ may be represented by placing a ^ above the x, or may be called an x-hat.

[0078] In the present disclosure, FR may be, for example, at least one of FR1, FR2, FR2-1, FR2-2, FR3, sub-terahertz, and terahertz. In the present disclosure, the frequency range corresponding to FR1 may be 410-7125 MHz. In the present disclosure, FR2 may include FR2-1 and FR2-2, and the frequency range corresponding to FR2-1 may be 24250-52600 MHz, and the frequency range corresponding to FR2-2 may be 52600-71000 MHz.

[0079] In this disclosure, the following abbreviations may be used: FDM: frequency division multiplexing TDM: time division multiplexing CDM: code division multiplexing SDM: space division multiplexing SFN: single frequency network

[0080] In the present disclosure, the base station (BS), TRP, AP, gNB, and network (NW) may be interchangeable.

[0081] In the present disclosure, receiving, detecting, monitoring, and selecting may be read interchangeably.

[0082] In the present disclosure, cell-free, TRP clustering, TRP cluster, cluster, super cell, and cell group may be read interchangeably.

[0083] In the present disclosure, the terms "first cell," "second cell," "cell," "area," and "coverage" may be interchangeable. In the present disclosure, the terms "first cell," "TRP cluster," "super cell," "cell group," "cell," "TCI state," "set / cluster / group of TCI state / RS / cell / sub-cell / TRP" may be interchangeable. In the present disclosure, the terms "second cell," "cell," "sub-cell," "TCI state," "RS," "TRP," "subset / sub-cluster / sub-group of TCI state / RS / cell / sub-cell / TRP / AP" may be interchangeable.

[0084] In this disclosure, QCL, QCL assumption, QCL information (qcl-Info), spatial relationship, TCI, TCI state, unified TCI state, joint TCI state, DL TCI state, UL TCI state, spatial filter, spatial domain [transmit / receive] filter, UL Tx spatial filter, spatial [Tx / Rx] filter, synchronization signal (index), DL RS [resource [index]], SSB [index], CSI-RS resource [index], beam [ID], TRP, AP, QCL type A / B / C / D, RS [resource] [in QCL information] [of QCL type A / B / C / D] in TCI state, [QCL] source RS, [source] RS [resource] for determining spatial domain filter, [UL] RS [resource] transmitted using spatial domain transmit filter, [DL] RS [resource] transmitted using DL spatial domain transmit filter may be read as interchangeable.

[0085] In the present disclosure, DL RS, synchronization signal (SS), PSS, SSS, PBCH, SSB, SS / PBCH block, SSB index, SS / PBCH block index, candidate SS / PBCH block index, CSI-RS, CSI-RS resource, and CSI-RS resource index may be interchangeable.

[0086] In the present disclosure, activated x and active x may be interchangeable. In the present disclosure, deactivated x and inactive x may be interchangeable. In the present disclosure, active TRP cluster, source RS associated with active TRP cluster, active source RS, and TRP cluster associated with active source RS may be interchangeable.

[0087] (Wireless communication method) <Embodiment 1> In addition to the configuration of the source RS, the QCL assumption may be applied depending on the conditions for the configuration / reconfiguration / instruction of the TRP cluster. This allows the UE to assume the source RS for assuming the QCL information, and perform optimal reception / decoding for the DL.

[0088] The QCL assumptions may be based on at least one of several options x below:

[0089] <<Option 1>> The conditions for setting / resetting / instructing a TRP cluster may depend on the TRP cluster (corresponding source RS). The conditions may be one of the following options 1-x / Notes, or may be the result of a logical operation (e.g., AND / OR) of two or more conditions.

[0090] ◆ Option 1-1: The TRP cluster associated with the source RS is activated or deactivated (deactivated), or the source RS associated with the TRP cluster is activated or deactivated (deactivated).

[0091] ◆ Option 1-2: The TRP cluster associated with the source RS may or may not be changed, or the source RS associated with the TRP cluster may or may not be changed.

[0092] ◆Note: The TRP cluster / source RS may be configured / reconfigured by an RRC IE, may be activated / deactivated / changed / updated by a MAC CE / DCI, or may be activated / deactivated / changed / updated by rules defined in the specification.

[0093] <<Option 2>> The behavior for which QCL assumptions are applied depending on the changes regarding the TRP cluster may be based on at least one of several Option 2-x / variations below.

[0094] ◆ Option 2-1: QCL assumptions are applied only when the source RS is associated with an active TRP cluster. In the example of Figure 4A, if TRP cluster A is activated, QCL assumptions based on source RS #1 associated with TRP cluster A are applied. In the example of Figure 4B, if TRP cluster A is deactivated, QCL assumptions based on source RS #1 are not applied.

[0095] ◆ Option 2-2: The QCL assumption applies only if the associated source RS has been received X times after the TRP cluster is activated. The X receptions of the source RS may span multiple active times of the TRP cluster. In other words, there may be activation / deactivation of the TRP cluster between the X receptions of the source RS. The active time of the TRP cluster may be the period from when the TRP cluster is activated to when it is deactivated.

[0096] ◆Option 2-3: The QCL assumption applies only if the associated source RS is received X times during a single active time of the TRP cluster. The X receptions of the source RS do not span multiple active times of the TRP cluster. The QCL assumption may apply only if there is no activation / deactivation of the TRP cluster between the X receptions of the source RS associated with an active TRP cluster.

[0097] ◆Options 2-4: Different QCL assumptions are applied when the associated TRP cluster / supercell / cell group is active and when it is not active.

[0098] ◆ Variation: If the source RS satisfies the known conditions [in "Known Conditions for DL ​​TCI Conditions" above], the QCL assumption applies.

[0099] <<Option 3>> When the conditions for configuring / reconfiguring / instructing a TRP cluster (e.g., the conditions in Option 1) are not met, the behavior may be based on at least one of the following options 3-x.

[0100] ◆ Option 3-1: The behavior is undefined. For example, QCL assumptions regarding delay / Doppler / spatial domains are undefined.

[0101] ◆ Option 3-2: A default QCL assumption is provided / applied. For example, if the [configured] source RS for the QCL assumption for DL ​​is associated with a deactivated TRP cluster, the UE assumes a specific RS as the source RS for the QCL assumption instead of the [configured] source RS. The method for determining / providing the default QCL assumption may be based on at least one of the definitions / rules of the specification, UE capability signaling, and "Notifying Information to the UE" described below. The QCL type applied in the default QCL assumption may be limited. For example, in the default QCL assumption, only at least one of QCL Type B and QCL Type C may be applicable. In other words, at least one of QCL Type A and QCL Type D may not be applicable.

[0102] The specific RS may be at least one of the following RSs: ◆ RS1: An RS corresponding to another active TRP cluster, or another active source RS. For example, when TRP cluster A is turned off (or when TRP cluster A is deactivated, or when the source RS corresponding to TRP cluster A is not transmitted, or when TRP cluster A is deactivated and the source RS corresponding to TRP cluster A is not transmitted), the specific RS for the default QCL assumption may be the RS corresponding to the active TRP cluster B.

[0103] ◆ RS2: An RS that is always active (always ON) regardless of whether the TRP cluster is activated or deactivated (active or inactive). For example, even in assumption B, some / part of RSs are always transmitted, and these RSs may be specific RSs for the default QCL assumption.

[0104] By replacing "QCL assumption" in the embodiment with "UL TCI state", the first embodiment may be applied to determining the UL TCI state.

[0105] <Embodiment 2> When operation using TRP clustering is performed / configured (TRP cluster is configured), the UE may perform / expect / assume specific behavior in determining DL / UL TCI status. This embodiment may be based on Option 1 below.

[0106] <<Option 1>> The specific behavior may be based on at least one of several options 1-x / notes below.

[0107] ◆ Option 1-1: When one or more DL RSs (one or more source RSs) for a DL / UL TCI state are considered / referenced / applied / determined / configured / indicated, the number of one or more candidate TCI states (one or more candidate DL RSs) for determining the DL / UL TCI state is equal to or greater than the number of DL RSs considered / referenced / applied / determined / configured / indicated. Multiple candidate TCI states may refer to multiple TCI states / DL RSs configured / indicated for multiple active or inactive TRPs, or may refer to multiple TCI states / DL RSs configured / indicated for one or more TRPs in an active TRP cluster. For example, multiple DL RSs for DL / UL TCI states may be transmitted from multiple TRPs in an active TRP cluster using the same sequence in the same time and frequency resources in a single frequency network (SFN). In this case, the UE may regard the multiple DL RSs as one source RS and determine the source RS as the DL / UL TCI state, or may determine one source RS among the multiple DL RSs as the DL / UL TCI state, or may determine one DL RS corresponding to one TRP among the multiple TRPs as one source RS (single-TRP operation may be assumed).

[0108] ◆ Option 1-2: The number of one or more DL RSs (one or more TCI states) configured / indicated for determining the DL / UL TCI state is greater than the number of one or more DL / UL TCI states (one or more source RSs) considered / referenced / applied / determined / configured / indicated. The number of one or more DL RSs (one or more TCI states) configured / indicated for determining the DL / UL TCI state may be greater than the number of one or more UL TCI states considered / referenced / applied / determined / configured / indicated. The one or more DL RSs configured / indicated may refer to multiple DL RSs (TCI states) configured / indicated for multiple active or inactive TRPs, or may refer to multiple DL RSs configured / indicated for one or more TRPs in an active TRP cluster. The one or more DL RSs configured / indicated may be given per TRP. For example, multiple RSs with different sequences (RSs per TRP) may be transmitted from multiple TRPs in an active TRP cluster. In this case, multiple DL RSs from multiple TRPs may be configured / indicated for determining the DL / UL TCI state, and the UE may determine one or more source RSs from the multiple DL RSs as the DL / UL TCI state. From the configured / indicated multiple DL RSs (more than the number of TRPs in the active TRP cluster), fewer source RSs may be determined as the DL / UL TCI state, or one source RS per TRP may be determined as the DL / UL TCI state. The UE may determine multiple TCI states and use the multiple TCI states for joint reception / transmission (assuming simultaneous reception / transmission using the multiple TCI states). The UE may acquire / apply characteristics (channel characteristics / QCL parameters) obtained by combining the received signals of multiple DL RSs. If one or more DL RSs configured / indicated are given per TRP, the UL TCI state may be applied to SFN'd DL / UL transmissions (joint reception / joint transmission).

[0109] Note: The UE may receive configuration / indication information of multiple candidate TCI states via RRC IE / MAC CE / DCI. The UE may receive configuration / indication information of multiple DL RSs via RRC IE / MAC CE / DCI.

[0110] The second embodiment may be based on at least one of the following details x:

[0111] <<Detail 1>> Detail 1 can be mainly applied to Option 1-1, but may also be applied to Option 1-2.

[0112] One or more TCI states (one or more source DL RSs) for DL / UL may be selected from multiple candidate TCI states (multiple DL RSs) to be configured / indicated based on at least one of the following rules / notes: ◆ Rule 1: From multiple candidate TCI states, one or more TCI states associated with a specific number of values ​​(up to Y-th values) of a parameter related to open-loop transmit power setting in order from the maximum (or minimum) value. The parameter may be, for example, a target / nominal transmit power or a P0 value. ◆ Rule 2: From multiple candidate TCI states, one or more TCI states associated with a specific number of values ​​(up to Y-th values) of a parameter related to path loss estimation in order from the maximum (or minimum) value. The parameter may be, for example, a path loss estimation value. ◆ Rule 3: One or more TCI states are configured / indicated by the NW using signaling in the "Notification of Information to UE" section described later. ◆ Note: Two or more of the above rules may be set / instructed by the NW using signaling in the "Notification of Information to UE" section described later.

[0113] <<Details 2>> Details 2 can be mainly applied to Option 1-2, but may also be applied to Option 1-1.

[0114] The one or more TCI states determined for the DL / UL TCI state may be based on at least one of the following definitions / notes: ◆ Definition 1 [Regarding UL Tx Spatial Domain Filter]: The UL Tx spatial domain filter based on one or more determined TCI states satisfies (guarantees) the beam correspondence requirement [in the above "Beam Correspondence"] for at least one DL RS [not all] of the multiple DL RSs [transmitted from the multiple TRPs]. In the example of Figure 5, source RS #1 in the determined TCI state satisfies the beam correspondence requirement with UL Tx Spatial Domain Filter #1. ◆ Definition 1a (UL Tx Spatial Domain Filter) [Regarding UL Tx Spatial Domain Filter]: The UL Tx spatial domain filter based on one determined TCI state satisfies (guarantees) the beam correspondence requirement [in the above "Beam Correspondence"] for all of the multiple DL RSs [transmitted from the multiple TRPs]. ◆ [Related to the delay domain] Definition 2: The UL Tx spatial domain filter based on one or more determined TCI states satisfies (guarantees) at least one of the requirements of average delay and delay spread for at least one DL RS (not all) of the multiple DL RSs (transmitted from the multiple TRPs). ◆ [Related to the delay domain] Definition 2a: The UL Tx spatial domain filter based on one or more determined TCI states satisfies (guarantees) at least one of the requirements of average delay and delay spread for all of the multiple DL RSs (transmitted from the multiple TRPs). ◆ [Related to the Doppler domain] Definition 3: The UL Tx spatial domain filter based on one or more determined TCI states satisfies (guarantees) at least one of the requirements of Doppler shift and Doppler spread for at least one DL RS (not all) of the multiple DL RSs (transmitted from the multiple TRPs).◆ Definition 3a [Regarding the Doppler domain]: The UL Tx spatial domain filter based on one or more determined TCI states satisfies (guarantees) at least one requirement of Doppler shift and Doppler spread for all of the multiple DL RSs [transmitted from multiple TRPs]. ◆ Note: The number of configured / indicated multiple DL RSs may be X > 1. X may be defined in the specification, reported by the UE capability report, or determined by signaling in the "Notification of information to the UE" section below.

[0115] By replacing "DL RS" in the embodiments with "UL RS" or "RS [including DL RS and UL RS]," the second embodiment may be applied to the UL RS that is considered / referenced / applied / determined / configured / instructed for the DL / UL TCI state.

[0116] <Variations> In the present disclosure, the DL RS to be considered / referenced / applied / determined / configured / instructed for the QCL assumption / TCI state / UL Tx spatial filter may be at least one of a constantly (periodically) transmitted SSB, a partially transmitted SSB, a TRS, a CSI-RS, and a [DL] DMRS. One or more of the above embodiments may be applied to only a portion of the at least one DL RS. For example, one or more of the above embodiments may be applied only when at least one of a constantly (periodically) transmitted SSB, a partially transmitted SSB, and a TRS is considered to be a DL RS.

[0117] In the present disclosure, the RS considered / referenced / applied / determined / configured / instructed for the QCL assumption / TCI state / UL Tx spatial filter may be a UL RS, which may be, for example, at least one of an SRS and a UL DMRS.

[0118] In the present disclosure, the terms first cell, TRP cluster, super cell, cell group, cell, TCI state, set / cluster / group of TCI state / RS / cell / sub cell / TRP may be read interchangeably.

[0119] One or more of the above embodiments may be applied to the case where cell-free is not used, by replacing the active TRP cluster with the active TCI state. One or more of the above embodiments may be applied to the case where the on-demand RS is configured as the DL RS for the QCL assumption.

[0120] A timeline / procedure that a UE should follow to activate a TRP cluster may be defined.

[0121] <Supplementary Information> <<Notification of Information to UE>> In the above-described embodiments, any information may be notified to the UE [from a Network (NW) (e.g., a Base Station (BS))] (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC message, LTE positioning protocol (LPP) message), specific signals / channels (e.g., DCI, PDCCH, PDSCH, reference signal), or a combination thereof.

[0122] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an existing MAC CE with a new octet introduced.

[0123] When the notification is performed by a DCI, the notification may be performed by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0124] In addition, notification of any information to the UE in the above embodiments may be periodic, semi-persistent (triggered by the UE or the gNB), or aperiodic (triggered by the UE or the gNB).

[0125] In the above-described embodiment, the UE may receive information (QCL information) of at least one of 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)

[0126] In the above embodiment, the QCL source RS for each QCL type may be at least one of the following several RSs: ◆ SSB ◆ CSI-RS with / without repetition ◆ TRS ◆ DMRS of PDCCH / PDSCH

[0127] In the above-described embodiment, the information from the NW may be set / instructed by the following methods: Common to multiple UEs or UE-specific Cell-specific or common to multiple cells Per UE / per CC / per BWP / per band / per cell / per cell group (CG)

[0128] <<Notification of Information from UE>> In the above-described embodiments, notification of any information from the UE [to the NW] (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC message, LPP message), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0129] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an extension of an existing MAC CE by introducing a new octet.

[0130] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0131] 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).

[0132] <<Regarding application of each embodiment>> In a UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the above-mentioned embodiments may be applied (used) when one or more of the following conditions are met: ◆ Upper layer parameters indicating the specific processes / operations / controls / assumptions / information are set, ◆ The specific processes / operations / controls / assumptions / information are determined based on related upper layer parameters, ◆ The specific processes / operations / controls / assumptions / information are specified / activated / triggered by MAC CE / DCI / UCI / resources / channels / RS, ◆ A specific UE capability indicating (or related to) the specific processes / operations / controls / assumptions / information is reported or supported, ◆ The application of the specific processes / operations / controls / assumptions / information is determined based on specific conditions.

[0133] The specific UE capability may indicate at least one of the following: ◆ Supporting the specific process / operation / control / assumption / information ◆ Capability of each embodiment ◆ Capability of each option in each embodiment, or capability of a combination of multiple options in each embodiment ◆ Capability of each option in each embodiment, or capability of a combination of multiple options in each embodiment.

[0134] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC), or may be a capability for each functionality / model.

[0135] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0136] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0137] The information on whether one or more of the above embodiments / options / choices / examples apply / are used, or which of several of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆ The information is configured by one or more higher layer parameters / RRC IEs. ◆ The information is determined by one or more related higher layer parameters / RRC IEs. ◆ The information is indicated by a MAC CE / DCI. ◆ The information is based on one or more UE capabilities. ◆ The information is described / defined in a specification. ◆ The information is based on conditions described / defined in a specification. ◆ The information is determined by a combination of several of the above information. For example, the information is determined by the configuration / indication of higher layer parameters / MAC CE / DCI and reported by a UE capability.

[0138] The above embodiments / options / choices may be combined into one embodiment / option / choice.

[0139] In the above embodiments, the RS to be measured may be a QCL source RS in an active / indicated / unified TCI state.

[0140] (Supplementary Notes) The following inventions are supplementary notes regarding embodiments of the present disclosure (particularly embodiment 1): [Supplementary Note 1] A terminal having: a receiving unit that receives a configuration of a cluster of a plurality of transmission and reception points; and a control unit that applies at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of reception and transmission based on a condition related to the configuration. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the condition is based on at least one of whether at least one of the cluster and a source reference signal (RS) associated with the cluster is active or has changed. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the controller applies at least one of the QCL assumption and the spatial domain filter to at least one of the reception and transmission in at least one of the following cases: at least one source RS of the QCL assumption and the spatial domain filter is associated with an active cluster; after the active cluster is activated, the number of times of reception of the source RS associated with the active cluster is equal to or greater than a specific value; and during a single active time of the active cluster, the number of times of reception of the source RS associated with the active cluster is equal to or greater than a specific value. [Supplementary Note 4] The terminal according to any of Supplementary Note 1 to Supplementary Note 3, wherein the controller applies at least one of the QCL assumption and the spatial domain filter to at least one of the reception and the transmission if the condition is not satisfied.

[0141] (Supplementary Notes) The following inventions are supplemented with respect to embodiments of the present disclosure (particularly embodiment 2). [Supplementary Note 1] A terminal having: a receiving unit that receives information of at least one of a plurality of candidate transmission configuration indication (TCI) states and a plurality of downlink reference signals; and a control unit that applies one or more TCI states based on the information to at least one of reception and transmission for a cluster of a plurality of transmission and reception points. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the number of the plurality of candidate TCI states is equal to or greater than the number of the one or more TCI states. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the number of the plurality of downlink reference signals is greater than the number of the one or more TCI states. [Supplementary Note 4] The terminal according to any one of Supplements 1 to 3, wherein the one or more TCI states are associated with specific numbers of values ​​in the order of values ​​of a power-related parameter, or the one or more TCI states satisfy at least one requirement of beam correspondence, mean delay, delay spread, Doppler shift, and Doppler spread for a portion of the plurality of downlink reference signals.

[0142] (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.

[0143] 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0144] 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.

[0145] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0146] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0147] 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.

[0148] 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 supercell) may be composed of multiple [virtual] cells (which may be called, for example, subcells). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell with a quasi-static / dynamically variable physical range. In this case, the wireless communication system 1 may be called a cell-free system.

[0149] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0150] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0151] 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.

[0152] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 / Xn interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0153] 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.

[0154] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0155] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0156] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0157] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0158] 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.

[0159] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0160] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0161] 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.

[0162] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0163] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0164] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0165] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0166] 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.

[0167] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0168] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0169] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0170] 7 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.

[0171] 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.

[0172] 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.

[0173] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0174] 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.

[0175] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0176] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0177] 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.

[0178] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0179] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0180] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0181] The transceiver 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 transceiver antenna 130.

[0182] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0183] 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.

[0184] 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.

[0185] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0186] 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.

[0187] 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 implement 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 implement higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement the functions of the PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer.

[0188] In the present disclosure, the base station 10 may include a single device that realizes all of the functions of the RU, DU, and CU, or may include multiple devices that each realize 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.

[0189] The transceiver unit 120 may transmit a configuration of a cluster of multiple transmission and reception points, and the control unit 110 may apply at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of reception and transmission based on conditions related to the configuration.

[0190] The transceiver unit 120 may transmit information of at least one of a plurality of candidate transmission configuration indication (TCI) states and a plurality of downlink reference signals, and the control unit 110 may apply one or more TCI states based on the information to at least one of reception and transmission at one or more transmission / reception points in a cluster of a plurality of transmission / reception points.

[0191] (User Terminal) Fig. 8 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 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0192] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0193] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0194] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0195] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0196] 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.

[0197] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0198] 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.

[0199] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0200] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0201] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0202] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0203] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0204] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0205] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0206] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0207] 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.

[0208] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0209] The transceiver unit 220 may receive a configuration of a cluster of multiple transmission / reception points (e.g., a TRP cluster). The controller 210 may apply at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of the reception and transmission based on conditions related to the configuration. The configuration may indicate TRP clustering or one or more TRPs / DL RSs / source RSs / [candidate] TCI states / PCIs within the TRP cluster. At least one of the reception and transmission may be reception / transmission of DL / UL channels / RSs.

[0210] The condition may be based on at least one of the cluster and a source reference signal (RS) associated with the cluster being active and / or being changed.

[0211] In at least one of the following cases: at least one source RS of the QCL assumption and the spatial domain filter is associated with an active cluster; after the active cluster is activated, the number of times the source RS associated with the active cluster is received is greater than or equal to a specific value; and within a single active time of the active cluster, the number of times the source RS associated with the active cluster is received is greater than or equal to a specific value, the control unit 210 may apply at least one of the QCL assumption and the spatial domain filter to at least one of the reception and the transmission.

[0212] If the condition is not met, the controller 210 may apply default values ​​of the QCL assumption and / or the spatial domain filter to at least one of the reception and transmission.

[0213] The transceiver unit 220 may receive information on at least one of a plurality of candidate transmission configuration indication (TCI) states and a plurality of downlink reference signals. The controller 210 may apply one or more TCI states based on the information to at least one of reception and transmission for a cluster of a plurality of transmission / reception points. The information may be an RRC IE / MAC CE / DCI. The at least one of reception and transmission may be reception / transmission of a DL / UL channel / RS.

[0214] The number of the plurality of candidate TCI states may be equal to or greater than the number of the one or more TCI states.

[0215] The number of the plurality of downlink reference signals may be greater than the number of the one or more TCI states.

[0216] The one or more TCI states may be associated with a specific number of values ​​in the order of power-related parameter values, or the one or more TCI states may satisfy at least one requirement of beam correspondence, mean delay, delay spread, Doppler shift, and Doppler spread for a portion of the plurality of downlink reference signals.

[0217] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0218] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0219] 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. 9 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0220] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0221] 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.

[0222] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0223] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0224] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0225] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0226] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0227] 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.

[0228] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0229] 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.

[0230] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0231] In addition, the devices included in the core network 30 (for example, network nodes that provide NF) may also be realized by the above-mentioned functional block / hardware configuration.

[0232] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0233] 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.

[0234] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0235] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0236] 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.

[0237] 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.

[0238] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0239] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0244] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0245] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0246] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0247] 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.

[0248] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0249] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0250] 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."

[0251] 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.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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 / specifying (or relating to) the value of the any information.

[0258] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0259] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0260] 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).

[0261] 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).

[0262] 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.

[0263] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0264] 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).

[0265] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "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.

[0266] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0267] 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.

[0268] 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.

[0269] 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.

[0270] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0271] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0272] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0273] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0274] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0275] 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.

[0276] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 10 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0282] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0283] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0284] 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.

[0285] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0286] 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.

[0287] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0288] 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.

[0289] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0290] 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.

[0291] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0292] 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.

[0293] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0294] 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.

[0295] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0296] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0297] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0298] 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."

[0299] 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.

[0300] 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.

[0301] 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.

[0302] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0303] 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...."

[0304] 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 ..." or "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ..." or "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).

[0305] 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.

[0306] 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."

[0307] 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.

[0308] 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."

[0309] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0310] 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.

[0311] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is any integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0312] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0313] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0314] 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.

[0315] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

a receiving unit for receiving a cluster configuration of a plurality of transmitting and receiving points; and a control unit that applies at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of reception and transmission based on a condition related to the configuration.

10. The terminal of claim 1, wherein the condition is based on at least one of the cluster and a source reference signal (RS) associated with the cluster being active and / or being changed.

2. The terminal of claim 1, wherein the controller applies at least one of the QCL assumption and the spatial domain filter to at least one of the reception and the transmission in at least one of the following cases: a case in which at least one source RS of the QCL assumption and the spatial domain filter is associated with an active cluster; a case in which the number of receptions of the source RS associated with the active cluster is equal to or greater than a specific value after the active cluster is activated; and a case in which the number of receptions of the source RS associated with the active cluster is equal to or greater than a specific value within a single active time of the active cluster. 　 The terminal of claim 1 , wherein if the condition is not met, the controller applies default values ​​of the QCL assumption and at least one of the spatial domain filter to at least one of the reception and the transmission. 　 receiving a configuration for a cluster of a plurality of transmitting and receiving points; and applying at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of reception and transmission based on a condition related to the configuration. 　 a transmitter for transmitting a cluster configuration of a plurality of transmitting and receiving points; and a controller that applies at least one of a quasi co-location (QCL) assumption and a spatial domain filter to at least one of reception and transmission based on a condition related to the configuration.

Images