Terminal, wireless communication method, base station and system

Abstract

A terminal according to one aspect of the present disclosure has: a reception unit that receives a list of a plurality of cells, and receives a medium access control (MAC) control element (CE) activating one or more transmission configuration indication (TCI) states which correspond to a TCI codepoint for a physical downlink shared channel in one cell among the plurality of cells; and a control unit that applies one or more active TCI states to one or more cells among the plurality of cells. According to this aspect of the present disclosure, TCI states can be suitably determined for a plurality of cells / CCs.

Description

[Technical Field]

[0001] The present disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system. 、 base Stations and systems Regarding. [Background technology]

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

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

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

[0005] In future wireless communication systems (e.g., NR), it is being considered that user terminals (UEs) will control transmission and reception processing based on information about quasi-co-location (QCL) (QCL assumptions / Transmission Configuration Indication (TCI) states / spatial relationships).

[0006] Furthermore, in future wireless communication systems (for example, NR), methods of receiving the physical downlink control channel (PDCCH) / physical downlink shared channel (PDSCH) are being studied for higher reliability / high-speed movement.

[0007] However, it is not clear how to determine the TCI state for multiple cells / component carriers (CCs) taking into account a single frequency network (SFN).If the method for determining the TCI state for multiple cells / CCs is not clear, it may lead to degradation of communication quality, degradation of throughput, etc.

[0008] Therefore, the present disclosure provides a terminal and a radio communication method that appropriately determine the TCI state for multiple cells / CCs. 、 base Stations and systems One of the aims is to provide [Means for solving the problem]

[0009] A terminal according to one aspect of the present disclosure includes: , multiple transmission configuration indication (TCI) states are updated simultaneously. a first higher layer parameter that sets a list of the number of serving cells; , s for the physical downlink control channel (PDCCH) Single frequency network (SFN) skiing SFN scheme for the system and physical downlink shared channel (PDSCH) a receiving unit for receiving second upper layer parameters for setting a configuration for the plurality of serving cells; and a receiving unit for receiving second upper layer parameters for setting a configuration for the plurality of serving cells in each serving cell based on the setting of the second upper layer parameters. RuP DCC H and P DSC H a control unit that determines whether or not to apply the SFN scheme to each of the plurality of stations independently; The control unit applies the same SFN scheme to the PDCCH and the PDSCH, and the control unit applies the same SFN scheme to all control resource sets (CORESET) in each serving cell. do. [Effects of the Invention]

[0010] According to one aspect of the present disclosure, the TCI states for multiple cells / CCs can be appropriately determined. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating an example of simultaneous beam updating for multiple CCs. [Figure 2] 2A and 2B are diagrams illustrating an example of a unified / common TCI framework. [Figure 3] FIG. 3 is a diagram showing an example of the mode 1a / 1b. [Figure 4] FIG. 4 is a diagram showing an example of the modes 1c, 1d, and 1e. [Figure 5] FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] (TCI, spatial relations, QCL) In NR, it is being considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in the UE of at least one of a signal and a channel (referred to as signal / channel) based on the transmission configuration indication state (TCI state).

[0013] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state which is applied to an uplink signal / channel may be expressed as a spatial relation.

[0014] The TCI state is information about the quasi-co-location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or signal.

[0015] A QCL is an index that indicates the statistical properties of a signal / channel. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same between these different signals / channels (i.e., they are QCLs with respect to at least one of these).

[0016] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be determined based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with an sQCL (spatial QCL).

[0017] A plurality of types (QCL types) of QCLs may be defined. For example, four QCL types A and B may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may also be referred to as QCL parameters) are listed below: QCL Type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread, QCL Type B (QCL-B): Doppler shift and Doppler spread, QCL Type C (QCL-C): Doppler shift and mean delay, · QCL Type D (QCL-D): Spatial reception parameters.

[0018] The assumption by a UE that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0019] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumption of the signal / channel.

[0020] The TCI state may be, for example, information about the QCL between the target channel (in other words, the Reference Signal (RS) for the channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0021] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0022] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0023] Furthermore, the RS that has a QCL relationship with the channel may be, for example, at least one of a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a CSI-RS for tracking (also called a Tracking Reference Signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0024] An SSB is a signal block that includes at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS / PBCH block.

[0025] An RS of QCL type X in a TCI state may refer to an RS that has a relationship of QCL type X with (the DMRS of) a certain channel / signal, and this RS may be called a QCL source of QCL type X in the TCI state.

[0026] (Multi-TRP PDSCH / non-SFN) In NR, one or more Transmission / Reception Points (TRPs) (multi-TRPs (MTRPs)) are considered to perform DL transmission to a UE using one or more panels (multi-panels). Also, it is considered that a UE performs UL transmission to one or more TRPs using one or more panels.

[0027] Note that multiple TRPs may correspond to the same cell identifier (ID), or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0028] Multi-TRPs (e.g., TRPs #1 and #2) may be connected by ideal / non-ideal backhauls to exchange information, data, etc. Each TRP of the multi-TRP may transmit a different code word (CW) and a different layer. Non-Coherent Joint Transmission (NCJT) may be used as a form of multi-TRP transmission.

[0029] In the NCJT, for example, TRP#1 performs modulation mapping and layer mapping on a first codeword to transmit a first PDSCH using a first number of layers (e.g., two layers) with a first precoding, and TRP#2 performs modulation mapping and layer mapping on a second codeword to transmit a second number of layers (e.g., two layers) with a second precoding.

[0030] Note that multiple PDSCHs (multi-PDSCHs) that are non-coherent may be defined as partially or completely overlapping in at least one of the time and frequency domains, i.e., a first PDSCH from a first TRP and a second PDSCH from a second TRP may overlap in at least one of the time and frequency resources.

[0031] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (Quasi-Co-Location (QCL)). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0032] Multiple PDSCHs from multiple TRPs (which may also be referred to as multiple PDSCHs) may be scheduled using one DCI (single DCI, single PDCCH) (single-master mode, single-DCI based multi-TRP). Multiple PDSCHs from multiple TRPs may also be scheduled using multiple DCIs (multiple DCI, multiple PDCCHs) (multi-master mode, multi-DCI based multi-TRP).

[0033] In Ultra-Reliable and Low Latency Communications (URLLC) for multiple TRPs, it is considered that PDSCH (transport block (TB) or codeword (CW)) repetition across multiple TRPs is supported. Repetition schemes (URLLC schemes, reliability enhancement schemes, e.g., schemes 1a, 2a, 2b, 3, and 4) across multiple TRPs in the frequency domain, layer (spatial) domain, or time domain are considered to be supported. In scheme 1a, multiple PDSCHs from multiple TRPs are space division multiplexed (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency division multiplexed (FDM). In scheme 2a, the redundancy version (RV) is the same for multiple TRPs. In scheme 2b, the RVs for multiple TRPs may be the same or different. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexed (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted in one slot. In scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different slots.

[0034] Such a multi-TRP scenario allows for more flexible transmission control using good quality channels.

[0035] To support intra-cell (having the same cell ID) and inter-cell (having different cell IDs) multi-TRP transmission based on multiple PDCCHs, in the RRC configuration information for linking multiple pairs of PDCCHs and PDSCHs with multiple TRPs, one control resource set (CORESET) in the PDCCH configuration information (PDCCH-Config) may correspond to one TRP.

[0036] If at least one of the following conditions 1 and 2 is satisfied, the UE may determine that the transmission is a multi-TRP transmission based on the multi-DCI transmission. In this case, the TRP may be replaced with a CORESET pool index. [Condition 1] A CORESET pool index of 1 is set. [Condition 2] Two different values ​​of the CORESET pool index (for example, 0 and 1) are set.

[0037] If the following condition is met, the UE may determine that the state is multi-TRP based on a single DCI, in which case the two TRPs may be interpreted as two TCI states indicated by the MAC CE / DCI. [conditions] "Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE" is used to indicate one or two TCI states for one codepoint of the TCI field in the DCI.

[0038] The DCI for common beam instruction may be a UE-specific DCI format (e.g., DL DCI format (e.g., 1_1, 1_2), UL DCI format (e.g., 0_1, 0_2)), or may be a UE-group common DCI format.

[0039] (Multi-TRP PDSCH / SFN (HST-SFN)) In LTE, placement in HST (high-speed train) tunnels is difficult. Large antennas transmit both inside and outside the tunnel. For example, the transmit power of a large antenna is approximately 1 to 5 W. For handover purposes, it is important for the UE to transmit outside the tunnel before entering it. For example, the transmit power of a small antenna is approximately 250 mW. Multiple small antennas (transmitting and receiving points) with the same cell ID and a distance of 300 m form a single frequency network (SFN). All small antennas within the SFN transmit the same signal at the same time on the same PRB. It is assumed that the terminal transmits and receives to a single base station. In reality, multiple transmitting and receiving points transmit the same DL signal. When moving at high speed, transmitting and receiving points several kilometers apart form a single cell. Handover occurs when crossing cells. This reduces the frequency of handovers.

[0040] In NR, it is assumed that beams transmitted from a transmission point (e.g., RRH) will be used to communicate with terminals (hereinafter also referred to as UE) included in moving objects (HST (high speed train)) such as trains moving at high speed. Existing systems (e.g., Rel. 15) support transmitting a unidirectional beam from the RRH to communicate with moving objects.

[0041] RRHs may be installed along the movement path (or movement direction, travel direction, or driving path) of a moving object, and a beam may be formed from each RRH in the direction of movement of the moving object. An RRH that forms a beam in one direction may be called a uni-directional RRH. When a beam is formed in the direction of movement of a moving object, the moving object receives a negative Doppler shift (-fD) from each RRH.

[0042] Here, we show a case where a beam is formed in the direction of travel of the moving body, but this is not limited to this, and a beam may be formed in the opposite direction to the direction of travel, or a beam may be formed in any direction regardless of the direction of travel of the moving body.

[0043] In Rel. 16 and later, it is expected that multiple beams (e.g., two or more) will be transmitted from the RRH. For example, it is expected that beams will be formed in both the direction of travel of a moving object and the opposite direction.

[0044] When beams are formed in both the moving direction of a moving object and the opposite direction, RRHs are installed along the moving path of the moving object, and beams are formed from each RRH in both the moving direction of the moving object and the opposite direction of the moving direction. An RRH that forms beams in multiple directions (for example, two directions) may also be called a bidirectional RRH.

[0045] In this HST, the UE communicates in the same way as with a single TRP. In base station implementations, it is possible to transmit from multiple TRPs (same cell ID).

[0046] In a bidirectional remote radio head unit (RRH), when two RRHs use SFN, the signal undergoes a negative Doppler shift and is switched to a signal undergoing a positive Doppler shift, which increases the power, midway between the two RRHs. In this case, the maximum Doppler shift change that requires correction is from -fD to +fD, which is twice as large as that in the case of a unidirectional RRH.

[0047] In the present disclosure, a positive Doppler shift may be interpreted as information regarding a positive Doppler shift, a Doppler shift in the positive (positive) direction, or Doppler information in the positive (positive) direction, and a negative Doppler shift may be interpreted as information regarding a negative Doppler shift, a Doppler shift in the negative (negative) direction, or Doppler information in the negative (negative) direction.

[0048] Here, as HST schemes, the following schemes 0 to 2 (HST scheme 0 to HST scheme 2) will be compared.

[0049] In scheme 0, a tracking reference signal (TRS), DMRS, and PDSCH are transmitted in common (using the same time and frequency resources) to two TRPs (RRHs) (normal SFN, transparent SFN, HST-SFN).

[0050] In scheme 0, the UE receives DL channels / signals equivalent to a single TRP, so there is one TCI state for the PDSCH.

[0051] Rel.16 specifies RRC parameters for distinguishing between transmissions using a single TRP and transmissions using SFN. When a UE reports corresponding UE capability information, the UE may distinguish between reception of a DL channel / signal using a single TRP and reception of a PDSCH assuming SFN based on the RRC parameters. On the other hand, the UE may perform transmission and reception using SFN assuming a single TRP.

[0052] In scheme 1, TRSs are transmitted TRP-specifically (using different time / frequency resources depending on the TRP). In this example, TRS1 is transmitted from TRP#1, and TRS2 is transmitted from TRP#2.

[0053] In Scheme 1, there are two TCI states for PDSCH since the UE receives DL channels / signals from each TRP using TRS from each TRP.

[0054] In Scheme 2, TRS and DMRS are transmitted individually for each TRP. In this example, TRS1 and DMRS1 are transmitted from TRP#1, and TRS2 and DMRS2 are transmitted from TRP#2. Compared to Scheme 0, Schemes 1 and 2 can suppress sudden changes in Doppler shift and appropriately estimate / compensate for Doppler shift. Since the DMRS in Scheme 2 is higher than that in Scheme 1, the maximum throughput of Scheme 2 is lower than that of Scheme 1.

[0055] In scheme 0, the UE switches between single TRP and SFN based on higher layer signaling (RRC information elements / MAC CE).

[0056] The UE may switch between Scheme 1 / Scheme 2 / NW pre-compensation schemes based on higher layer signaling (RRC information element / MAC CE).

[0057] In Scheme 1, two TRS resources are set for the HST's forward direction and its reverse direction, respectively.

[0058] In Scheme 1, TRPs (TRP#0, #2, ...) transmitting DL signals in the direction opposite to the HST transmit the first TRS (TRS arriving before the HST) in the same time and frequency resource (SFN). TRPs (TRP#1, #3, ...) transmitting DL signals in the direction of travel of the HST transmit the second TRS (TRS arriving after the HST) in the same time and frequency resource (SFN). The first TRS and second TRS may be transmitted / received using different frequency resources.

[0059] For example, TRS1-1 to TRS1-4 are transmitted as the first TRS, and TRS2-1 to TRS2-4 are transmitted as the second TRS. The Doppler shift of the second TRS is not equal to the Doppler shift of the first TRS.

[0060] Considering beam operation, the first TRS is transmitted using 64 beams and 64 time resources, and the second TRS is transmitted using 64 beams and 64 time resources. The beam of the first TRS and the beam of the second TRS are considered to be equal (QCL Type D RSs are equal). By multiplexing the first TRS and the second TRS into the same time resource but different frequency resource, resource utilization efficiency can be improved.

[0061] Multiple RRHs arranged along the HST's travel path may be connected to a baseband unit (BBU). Each RRH is a bidirectional RRH, and forms beams in both the forward and reverse directions of the travel path using each transmission / reception point (TRP).

[0062] In the received signal of Single TRP (SFN) / Scheme 1, when the UE receives a signal / channel transmitted from a TRP using a beam in the direction of travel of the HST (a beam from a TRP in the opposite direction of travel of the HST), a negative Doppler shift (-fD in this example) occurs. Also, when the UE receives a signal / channel transmitted from a TRP using a beam in the opposite direction of travel of the HST (a beam from a TRP in the direction of travel of the HST), a positive Doppler shift (+fD in this example) occurs.

[0063] In Rel. 17 and later, a TRP-based pre-compensation scheme (also known as a pre-Doppler compensation scheme, Doppler pre-compensation scheme, or network (NW) pre-compensation scheme (HST NW pre-compensation scheme)) is being considered for a base station to use when transmitting downlink (DL) signals / channels from a TRP to a UE in an HST. The TRP performs Doppler compensation in advance when transmitting DL signals / channels to a UE, thereby reducing the effect of Doppler shift when the UE receives the DL signals / channels. In this disclosure, the Doppler pre-compensation scheme may be a combination of Scheme 1 and Doppler shift pre-compensation by the base station.

[0064] In the Doppler pre-compensation scheme, it is considered that the TRS from each TRP is transmitted without Doppler pre-compensation, and the PDSCH from each TRP is transmitted after Doppler pre-compensation.

[0065] In the Doppler pre-compensation scheme, TRPs that form beams in the direction of travel of the moving path and TRPs that form beams in the opposite direction of travel of the moving path perform Doppler compensation before transmitting DL signals / channels to UEs within the HST. For example, a TRP that uses a beam in the direction of travel of the HST (a beam from a TRP in the opposite direction of travel of the HST) performs positive Doppler compensation on the transmitted signal / channel, while a TRP that uses a beam in the opposite direction of travel of the HST (a beam from a TRP in the direction of travel of the HST) performs negative Doppler compensation on the transmitted signal / channel to reduce the effect of Doppler shift when the UE receives the signal / channel.

[0066] In this case, there may be two TCI states for the PDSCH since the UE receives DL channels / signals from each TRP using the TRS from each TRP.

[0067] Furthermore, in Rel. 17 and later, dynamic switching between single TRP and SFN using the TCI field (TCI state field) is being considered. For example, one or two TCI states are configured / indicated at each TCI code point (code point of the TCI field, DCI code point) using the RRC information element / MAC CE (e.g., Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) / DCI (TCI field). The UE may determine to receive a PDSCH with a single TRP when one TCI state is configured / indicated. Also, the UE may determine to receive a PDSCH with a multi-TRP and SFN when two TCI states are configured / indicated.

[0068] In Rel. 16, Scheme 1a (Repetition Scheme 1a) for multi-TRP for URLLC (reliability) is similar to NCJT for enhanced Mobile Broadband (eMBB), but transmits a common CW using each of the PDSCHs of two different MIMO layers. By transmitting one data from two TRPs using SDM, reliability is improved compared to single TRP.

[0069] In Rel. 16, the two TCI states configured / indicated for the PDSCH are the TCI states for each DMRS port, and different TRPs are used for each MIMO layer. Each of the two TCI states indicates the relationship between the channel characteristics between the DMRS reception and another DL-RS (e.g., TRS). In this case, multiple DMRS ports each have multiple different TCI states (corresponding to different TCI states or QCL'd with different DL-RSs).

[0070] In HST Scheme 1 (Rel. 17 and later), two TCI states configured / indicated for a PDSCH may be TCI states of the same DMRS port. In this case, one DMRS port has multiple different TCI states (corresponding to multiple different TCI states or QCL'd with multiple different DL-RSs). Each of multiple DMRS ports has multiple different TCI states (corresponding to multiple different TCI states or QCL'd with multiple DL-RSs).

[0071] (Multi-TRP PDCCH) For PDCCH / CORESET specified in Rel. 15, one TCI state without a CORESET pool index (CORESETPoolIndex) (which may also be called TRP information (TRP Info)) is set to one CORESET.

[0072] Regarding the enhancement of PDCCH / CORESET specified in Rel. 16, in multi-TRP based on multi-DCI, a CORESET pool index is set for each CORESET.

[0073] In Rel. 17 and later, the following enhancements 1 and 2 for PDCCH / CORESET are being considered.

[0074] [Enhancement 1] In the case where multiple antennas (small antennas, transmission / reception points (TRPs)) with the same cell ID form a single frequency network (SFN), up to two TCI states can be configured / activated for one CORESET by higher layer signaling (RRC signaling / MAC CE). SFN contributes to the operation and / or reliability improvement of high speed trains (HST).

[0075] [Enhancement 2] In repeated transmission of PDCCH (which may simply be called "repetition"), two PDCCH candidates in two search space sets are linked, and each search space set is associated with a corresponding CORESET. The two search space sets may be associated with the same or different CORESETs. For one CORESET / search space set, one (maximum one) TCI state may be configured / activated by higher layer signaling (RRC signaling / MAC CE). Two SS set search space sets may be explicitly linked.

[0076] If two search space sets are associated with different CORESETs with different TCI states, this may mean a multi-TRP repeat transmission. If two search space sets are associated with the same CORESET (CORESET with the same TCI state), this may mean a single-TRP repeat transmission.

[0077] (Simultaneous beam update of multiple CCs) In Rel.16, one MAC CE can update the beam index (TCI state) of multiple CCs.

[0078] The UE can be configured by RRC with up to two applicable CC lists (e.g., applicable-CC-list). When two applicable CC lists are configured, the two applicable CC lists may correspond to in-band CA in FR1 and in-band CA in FR2, respectively.

[0079] The network may activate and deactivate the configured TCI states of a serving cell or of a set of serving cells configured in simultaneous TCI update list 1 (simultaneousTCI-UpdateList1) or simultaneous TCI update list 2 (simultaneousTCI-UpdateList2) by sending a TCI States Activation / Deactivation for UE-specific PDSCH MAC CE. If the indicated serving cell is configured as part of simultaneous TCI update list 1 or simultaneous TCI update list 2, the MAC CE applies to all serving cells configured in the set of simultaneous TCI update list 1 or simultaneous TCI update list 2.

[0080] The network may indicate the configured TCI states of a serving cell or of a set of serving cells configured in simultaneous TCI update list 1 (simultaneousTCI-UpdateList1) or simultaneous TCI update list 2 (simultaneousTCI-UpdateList2) by sending a TCI States Indication for UE-specific PDCCH MAC CE. If the indicated serving cell is configured as part of simultaneous TCI update list 1 or simultaneous TCI update list 2, the MAC CE applies to all serving cells configured in the set of simultaneous TCI update list 1 or simultaneous TCI update list 2.

[0081] Activation of TCI states on PDCCH The MAC CE activates the TCI states associated with the same CORESET ID on all BWP / CCs in the applicable CC list.

[0082] Activation of TCI states for PDSCH The MAC CE activates the TCI states on all BWP / CCs in the applicable CC list.

[0083] A-SRS / SP-SRS Spatial Relationship Activation The MAC CE activates spatial relationships associated with the same SRS resource ID on all BWPs / CCs in the applicable CC list.

[0084] In the example of Figure 1, the UE is configured with an applicable CC list indicating CCs #0, #1, #2, and #3, and a list indicating 64 TCI states for the CORESET or PDSCH of each CC. When one TCI state of CC #0 is activated by the MAC CE, the corresponding TCI states are activated in CCs #1, #2, and #3.

[0085] Such simultaneous beam updating is considered applicable only to the single TRP case.

[0086] For PDSCH, the UE may follow procedure A. [Step A] The UE receives activation commands to map up to eight TCI states to codepoints in the DCI field (TCI field) within one CC / DL BWP or within one set of CC / BWPs. If one set of TCI state IDs is activated for one set of CC / DL BWPs, then the applicable list of CCs is determined by the CC indicated in the activation command, and the same set of TCI states applies to all DL BWPs within the indicated CC. A set of TCI state IDs can be activated for one set of CC / DL BWPs only if the UE is not provided with multiple different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and at least one TCI codepoint that maps to two TCI states.

[0087] For PDCCH, the UE may follow procedure B. [Step B] If the UE is provided with up to two lists of cells for simultaneous TCI state activation by the simultaneous TCI cell list (simultaneousTCI-CellList) via the simultaneous TCI update list (at least one of simultaneousTCI-UpdateList-r16 and simultaneousTCI-UpdateListSecond-r16), the UE applies antenna port quasi co-location (QCL) provided by TCI states with the same activated TCI state ID value to the CORESET with index p in all configured DL BWPs of all configured cells in one list determined from the serving cell index provided by the MAC CE command. A simultaneous TCI cell list can be provided for simultaneous TCI state activation only if the UE is not provided with different values ​​of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet) and at least one TCI codepoint that maps to two TCI states.

[0088] For semi-persistent (SP) / aperiodic (AP)-SRS, the UE may follow procedure C. [Step C] For one set of CCs / BWPs, when the spatial relationship information (spatialRelationInfo) for the SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) is activated / updated by the MAC CE, then the applicable list of the CC is indicated by the simultaneous spatial update list (higher layer parameter simultaneousSpatial-UpdateList-r16 or simultaneousSpatial-UpdateListSecond-r16), and the spatial relationship information is applied to the SP or AP-SRS resources with the same SRS resource ID in all BWPs within the indicated CC. The spatial relation information (spatialRelationInfo) for the SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) for one set of CC / BWP is activated / updated by the MAC CE only if the UE is not provided with multiple different values ​​of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states.

[0089] The simultaneous TCI cell list (simultaneousTCI-CellList) and the simultaneous TCI update list (at least one of simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16) are lists of serving cells whose TCI relationships can be updated simultaneously using the MAC CE. simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16 do not include the same serving cell.

[0090] The simultaneous spatial update list (at least one of the upper layer parameters simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16) is a list of serving cells whose spatial relationships can be updated simultaneously using the MAC CE. simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16 do not contain the same serving cell.

[0091] Here, the simultaneous TCI update list and the simultaneous spatial update list are configured by the RRC, the CORESET pool index of the CORESET is configured by the RRC, and the TCI codepoint mapped to the TCI state is indicated by the MAC CE.

[0092] In the present disclosure, CC list, new CC list, simultaneous TCI cell list, simultaneousTCI-CellList, simultaneous TCI update list, simultaneousTCI-UpdateList1-r16, simultaneousTCI-UpdateList2-r16, simultaneous spatial update list, simultaneousSpatial-UpdatedList1-r16, simultaneousSpatial-UpdatedList2-r16 may be read as interchangeable.

[0093] In the present disclosure, simultaneousTCI-UpdateList1, simultaneousTCI-UpdateList1-r16, and simultaneousTCI-UpdateList-r16 may be interchangeable. In the present disclosure, simultaneousTCI-UpdateList2, simultaneousTCI-UpdateList2-r16, and simultaneousTCI-UpdateListSecond-r16 may be interchangeable.

[0094] In the present disclosure, simultaneousSpatial-UpdatedList1, simultaneousSpatial-UpdatedList1-r16, and simultaneousSpatial-UpdateList-r16 may be interchangeable. In the present disclosure, simultaneousSpatial-UpdatedList2, simultaneousSpatial-UpdatedList2-r16, and simultaneousSpatial-UpdateListSecond-r16 may be interchangeable.

[0095] (Unified / Common TCI Framework) The unified TCI framework allows UL and DL channels to be controlled by a common framework. Instead of specifying TCI states or spatial relationships for each channel as in Rel. 15, the unified TCI framework may specify a common beam (common TCI state) and apply it to all UL and DL channels, or may apply a common beam for UL to all UL channels and a common beam for DL ​​to all DL channels.

[0096] One common beam for both DL and UL, or one common beam for DL ​​and one common beam for UL (two common beams overall) are considered.

[0097] The UE may assume the same TCI state for UL and DL (joint TCI state, joint TCI pool, joint common TCI pool, joint TCI state set). The UE may assume different TCI states for UL and DL (separate TCI state, separate TCI pool, UL separate TCI pool and DL separate TCI pool, separate common TCI pool, UL common TCI pool and DL common TCI pool).

[0098] The default beams for UL and DL may be aligned via MAC CE based beam management (MAC CE level beam direction). The default TCI state of the PDSCH may be updated to align with the default UL beam (spatial relationship).

[0099] DCI-based beam management (DCI-level beam indication) may indicate a common beam / unified TCI state from the same TCI pool (joint common TCI pool, joint TCI pool, set) for both UL and DL. X (>1) TCI states may be activated by the MAC CE. The UL / DL DCI may select one from the X active TCI states. The selected TCI state may apply to both UL and DL channels / RS.

[0100] The TCI pool (set) may be multiple TCI states configured by RRC parameters, or multiple TCI states (active TCI states, active TCI pools, sets) activated by the MAC CE among the multiple TCI states configured by RRC parameters. Each TCI state may be a QCL type A / D RS. SSB, CSI-RS, or SRS may be configured as the QCL type A / D RS.

[0101] The number of TCI states corresponding to each of one or more TRPs may be specified. For example, the number N (≧1) of TCI states applied to UL channels / RSs (UL TCI states) and the number M (≧1) of TCI states applied to DL channels / RSs (DL TCI states) may be specified. At least one of N and M may be notified / configured / instructed to the UE via higher layer signaling / physical layer signaling.

[0102] In the present disclosure, when N=M=X (X is any integer), it may mean that X TCI states (joint TCI states) common to UL and DL (corresponding to X TRPs) are notified / configured / instructed to the UE. Also, when N=X (X is any integer) and M=Y (Y may be any integer, Y=X), it may mean that X UL TCI states (corresponding to X TRPs) and Y DL TCI states (i.e., separate TCI states) (corresponding to Y TRPs) are notified / configured / instructed to the UE.

[0103] For example, when N=M=1 is written, this may mean that a TCI state common to one UL and DL for a single TRP is notified / configured / indicated to the UE (joint TCI state for a single TRP).

[0104] Also, for example, when N=1 and M=1, it may mean that one UL TCI state and one DL TCI state for a single TRP are separately notified / configured / instructed to the UE (separate TCI states for a single TRP).

[0105] Also, for example, when N=M=2 is written, this may mean that a TCI state common to multiple (two) ULs and DLs for multiple (two) TRPs is notified / configured / instructed to the UE (joint TCI state for multiple TRPs).

[0106] Also, for example, when N=2 and M=2, this may mean that the UE is notified / configured / instructed to have multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs (separate TCI states for multiple TRPs).

[0107] In the above example, the case where the values ​​of N and M are 1 or 2 has been described, but the values ​​of N and M may be 3 or more, and N and M may be different.

[0108] In the example of Figure 2A, RRC parameters (information elements) configure multiple TCI states for both DL and UL. The MAC CE may activate multiple TCI states from the configured multiple TCI states. The DCI may indicate one of the activated multiple TCI states. The DCI may be a UL / DL DCI. The indicated TCI state may apply to at least one (or all) of the UL / DL channels / RS. One DCI may indicate both UL TCI and DL TCI.

[0109] In the example of this figure, one point may be one TCI state that applies to both UL and DL, or two TCI states that apply to UL and DL respectively.

[0110] At least one of the multiple TCI states configured by the RRC parameters and the multiple TCI states activated by the MAC CE may be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). The multiple TCI states activated by the MAC CE may be referred to as an active TCI pool (active common TCI pool).

[0111] In the present disclosure, higher layer parameters (RRC parameters) for setting multiple TCI states may be referred to as configuration information for setting multiple TCI states, or simply as "configuration information." Also, in the present disclosure, being instructed to set one of multiple TCI states using DCI may mean receiving indication information instructing one of the multiple TCI states included in DCI, or simply receiving "instruction information."

[0112] In the example of Figure 2B, the RRC parameters configure multiple TCI states (joint common TCI pools) for both DL and UL. The MAC CE may activate multiple TCI states (active TCI pools) from the configured multiple TCI states. Separate active TCI pools for UL and DL may be configured / activated.

[0113] The DL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may be applied to one or more (or all) DL channels / RSs. The DL channels may be PDCCH / PDSCH / CSI-RS. The UE may determine the TCI state of each DL channel / RS using the TCI state behavior (TCI framework) of Rel. 16. The UL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may be applied to one or more (or all) UL channels / RSs. The UL channels may be PUSCH / SRS / PUCCH. In this way, different DCIs may indicate the UL TCI and the DL DCI separately.

[0114] The existing DCI formats 1_1 / 1_2 may be used to indicate the common TCI status.

[0115] The common TCI framework may have separate TCI states for DL ​​and UL.

[0116] (Unified TCI Framework for Carrier Aggregation (CA)) The introduction of a unified TCI state framework for CA is being considered for NR Rel. 17 and later. The common TCI state indicated to the UE is expected to be common across CCs (cells) (at least between CCs, QCL type D). This is because the existing specifications (Rel. 15 / 16) do not support simultaneous reception of different DL channels / RSs in QCL type D, or simultaneous transmission of UL channels / RSs with different spatial relationships, except for cases such as transmission and reception using multiple TRPs.

[0117] In addition, in the unified TCI framework, common TCI state ID update / activation is being considered to provide common QCL information / common UL transmit spatial filter across a set of configured CCs.

[0118] The following options 1 and 2 are being considered for the TCI state pool for CA.

[0119] [Option 1] A single TCI state pool configured by RRC for a set of configured multiple CCs (cells) / BWPs may be shared (configured). For example, a cell group TCI state may be defined, or the TCI state pool for PDSCH in the reference cell may be reused. In the TCI state, there may be no CC (cell) ID for the QCL type-A RS, and the CC (cell) ID for the QCL type-A RS may be determined according to the target CC (cell) of the TCI state.

[0120] In option 1, a common TCI state pool is configured for each of multiple CC / BWPs, so that when one common TCI state is indicated in the MAC CE / DCI, the indicated common TCI state may be applied to all CC / BWPs (all CC / BWPs included in the pre-configured CC / BWP list).

[0121] [Option 2] For each individual CC, a TCI state pool may be configured by the RRC.

[0122] In Option 2, as in Rel. 16, the applicable CC / BWP list for simultaneous beam updates is pre-configured by RRC, and if a beam update is performed in MAC CE / DCI for any CC / BWP included in the CC / BWP list, the update may be applied to all CC / BWPs.

[0123] In option 1, a common TCI state pool is configured (shared) by RRC for multiple CCs, the TCI states in the common TCI state pool are indicated by a common TCI state ID, and one RS determined based on that TCI state is used to indicate QCL type D across the set of multiple configured CCs (Constraint 1).

[0124] In option 2, a separate common TCI state pool is configured by RRC for each CC, the TCI states in the common state pool are indicated by a common TCI state ID, and one RS determined based on the TCI state is used to indicate QCL type D across the set of multiple configured CCs (Constraint 2).

[0125] (analysis) The carrier aggregation (CA) scenario is considered to support an RRC-configured set of serving cells that can be controlled by a single MAC CE for activation of two TCI states of a CORESET with the same CORESET ID for all BWPs in the indicated CC set. However, no consideration has been given to a CORESET in the indicated CC set that does not have an SFN scheme configured.

[0126] For a CORESET, some CCs may be configured as SFNs and some CCs may be configured as non-SFNs. On one CC, some CORESETs may be configured as SFNs and some CORESETs may be configured as non-SFNs.

[0127] Here, the question arises as to how to apply the function of simultaneous update for each CC list, taking SFN-CORESET into consideration.

[0128] For TRP-based pre-compensation, a QCL assumption is provided to the UE by using an existing QCL type with certain QCL parameters dropped from the indicated QCL type. The UE does not assume that different SFN schemes (Scheme 1 or TRP-based pre-compensation scheme) are configured for PDCCH and PDSCH. The UE does not assume that different SFN schemes (Scheme 1 or TRP-based pre-compensation scheme) are configured for different CORESETs.

[0129] The following combinations of schemes for PDCCH and PDSCH (scheme for PDCCH, scheme for PDSCH) are permitted. (Single TRP, Scheme 1) (Single TRP, TRP-based advance compensation scheme) (Scheme 1, Single TRP) (TRP-based advance compensation scheme, single TRP) (Scheme 1, Scheme 1) · (TRP-based advance compensation scheme, TRP-based advance compensation scheme)

[0130] The following combinations of schemes for PDCCH and PDSCH (scheme for PDCCH, scheme for PDSCH) are not permitted. (TRP-based advance compensation scheme, Scheme 1) (Scheme 1, TRP-based advance compensation scheme)

[0131] Here, the question arises as to how the SFN scheme is set for the PDCCH / PDSCH of the CCs in the CC list.

[0132] Thus, if the method for determining the TCI state / SFN scheme for the CC list is not clear, there is a risk of a decrease in throughput / communication quality.

[0133] Therefore, the present inventors came up with a method for determining the TCI state / SFN setting / TRP setting for the CC list.

[0134] 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.

[0135] 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."

[0136] In the present disclosure, terms such as 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.

[0137] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), configurations, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0138] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof.

[0139] 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.

[0140] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0141] In this disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0142] In the present disclosure, "parameter X is not set," "parameter X does not exist," "parameter X is absent," "parameter X is not set to valid," "parameter X is set to invalid," etc. may be read interchangeably.

[0143] In this disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable.

[0144] In this disclosure, the terms "single TRP," "single TRP system," "single TRP transmission," and "single PDSCH" may be interchangeable. In this disclosure, the terms "multiple TRP," "multiple TRP system," "multiple TRP transmission," and "multiple PDSCH" may be interchangeable. In this disclosure, the terms "single DCI," "single PDCCH," "multiple TRP based on a single DCI," and "activating two TCI states on at least one TCI codepoint" may be interchangeable.

[0145] In the present disclosure, single TRP, channel using single TRP, channel using one TCI state / spatial relationship, no multi-TRP enabled by RRC / DCI, no multiple TCI states / spatial relationships enabled by RRC / DCI, no CORESETPoolIndex value of 1 set for any CORESET, and no codepoint in the TCI field mapped to two TCI states may be read interchangeably.

[0146] In the present disclosure, "multi-TRP," "channel using multi-TRP," "channel using multiple TCI states / spatial relationships," "multi-TRP being enabled by RRC / DCI," "multiple TCI states / spatial relationships being enabled by RRC / DCI," and "at least one of multi-TRP based on a single DCI" and "multi-TRP based on multiple DCI" may be interchangeable. In the present disclosure, "multi-TRP based on multiple DCI," and "setting a CORESET pool index (CORESETPoolIndex) value of 1 for the CORESET" may be interchangeable. In the present disclosure, "multi-TRP based on a single DCI," and "at least one code point in the TCI field is mapped to two TCI states" may be interchangeable.

[0147] In the present disclosure, the new ID, TRP-ID, group ID, and CORESET pool index may be interchangeable. In the present disclosure, the first value of the new ID, new ID value 0, and the first TCI state of two TCI states may be interchangeable. In the present disclosure, the second value of the new ID, new ID value 1, and the second TCI state of two TCI states may be interchangeable.

[0148] In the present disclosure, TRP#1 (first TRP) may correspond to CORESET pool index = 0 or may correspond to the first of two TCI states corresponding to one code point in the TCI field. TRP#2 (second TRP) TRP#1 (first TRP) may correspond to CORESET pool index = 1 or may correspond to the second of two TCI states corresponding to one code point in the TCI field.

[0149] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, and activation of two TCI states on at least one TCI codepoint may be read interchangeably.

[0150] In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, mDCI-based MTRP, and setting two CORESET pool indices or CORESET pool index=1 (or a value greater than or equal to 1) may be read interchangeably.

[0151] In the present disclosure, receiving DL signals (PDSCH / PDCCH) using SFN may mean receiving the same data (PDSCH) / control information (PDCCH) from multiple transmission / reception points using the same time / frequency resources, and / or receiving DL signals using SFN may mean receiving the same data / control information using the same time / frequency resources and / or multiple TCI states / space-domain filters / beams / QCLs.

[0152] In the present disclosure, the terms HST-SFN scheme, SFN scheme after Rel. 17, new SFN scheme, new HST-SFN scheme, HST-SFN scenario after Rel. 17, HST-SFN scheme for HST-SFN scenario, SFN scheme for HST-SFN scenario, Scheme 1, Doppler pre-compensation scheme, Scheme 1 (HST Scheme 1), and at least one of Doppler pre-compensation scheme may be interchangeable. In the present disclosure, the terms Doppler pre-compensation scheme, base station pre-compensation scheme, TRP pre-compensation scheme, pre-Doppler compensation scheme, Doppler pre-compensation scheme, NW pre-compensation scheme, and HST NW pre-compensation scheme may be interchangeable. In the present disclosure, the terms pre-compensation scheme, reduction scheme, improvement scheme, and correction scheme may be interchangeable.

[0153] In the present disclosure, SFN setting, SFN or non-SFN setting, setting whether to use SFN, setting whether to use two TCI states or one TCI state, and SFN scheme may be interchangeable. In the present disclosure, SFN, SFN scheme, scheme 1 or TRP-based pre-compensation scheme, two TCI states being activated, and reception using two TCI states may be interchangeable. In the present disclosure, non-SFN, non-SFN scheme, single TRP, and one TCI state being activated may be interchangeable.

[0154] In the present disclosure, TRP setting, multi-TRP or single-TRP setting, setting whether to use multi-TRP, setting whether to use two TCI states or one TCI state, and multi-TRP scheme may be read interchangeably.

[0155] In this disclosure, scheme 1 for HST, TRP-based pre-compensation scheme for HST, multi-TRP scheme for NJCT / URLLC (reliability), multi-TRP scheme, and multi-TRP iteration may be read interchangeably.

[0156] In the present disclosure, common beam, common TCI, common TCI state, unified TCI, unified TCI state, TCI state applicable to DL and UL, TCI state applicable to multiple (multiple types) channels / RS, TCI state applicable to multiple types of channels / RS, and PL-RS may be read interchangeably.

[0157] In the present disclosure, the terms multiple TCI states configured by RRC, multiple TCI states activated by MAC CE, pool, TCI state pool, active TCI state pool, common TCI state pool, joint TCI state pool, separate TCI state pool, common TCI state pool for UL, common TCI state pool for DL, common TCI state pool configured / activated by RRC / MAC CE, and TCI state information may be read interchangeably.

[0158] In the present disclosure, DL TCI, DL only TCI, separate DL only TCI, DL common TCI, DL unified TCI, common TCI, and unified TCI may be interchangeable. In the present disclosure, UL TCI, UL only TCI, separate UL only TCI, UL common TCI, UL unified TCI, common TCI, and unified TCI may be interchangeable.

[0159] In the present disclosure, setting / instructing / updating a separate TCI state, setting / instructing / updating a TCI state for DL ​​only, setting / instructing / updating a TCI state for UL only, and setting / instructing / updating a TCI state for DL ​​and UL may be read as interchangeable.

[0160] In the present disclosure, in the case of a joint TCI pool, "when a joint TCI pool is configured" and "when a separate TCI pool is configured" may be read interchangeably.

[0161] In the present disclosure, the terms "a joint TCI pool is configured," "the TCI pool configured for DL ​​and the TCI pool configured for UL are common," "a TCI pool for both DL and UL is configured," and "one TCI pool (one set of TCIs) is configured" may be read interchangeably.

[0162] In the present disclosure, the following terms may be interchangeable: a separate TCI pool is configured; a TCI pool configured for DL ​​and a TCI pool configured for UL are different; a TCI pool for DL ​​(first TCI pool, first TCI set) and a TCI pool for UL (second TCI pool, second TCI set) are configured; multiple TCI pools (multiple sets of TCIs) are configured; and a TCI pool for DL ​​is configured. When a TCI pool for DL ​​is configured, the TCI pool for UL may be equal to the configured TCI pool.

[0163] In the present disclosure, the channels / RS to which the common TCI is applied may be PDSCH / HARQ-ACK information / PUCCH / PUSCH / CSI-RS / SRS.

[0164] In the present disclosure, at least one CORESET on one CC is configured with an SFN, at least one CORESET on that CC is activated with two TCI states, and that CC is configured with an SFN PDCCH / SFN CORESET may be read as interchangeable.

[0165] In the present disclosure, the indicated CC(cell), the indicated CC(cell) / BWP, and the CC(cell) / BWP indicated by the MAC CE may be interchangeable. In the present disclosure, the CC(cell) and the CC(cell) / BWP may be interchangeable.

[0166] (Wireless communication method) In each of the following embodiments, either an SFN scheme (e.g., scheme 1 for HST, TRP-based pre-compensation scheme for HST) or a non-SFN scheme (e.g., a multi-TRP scheme for NJCT / URLLC (reliability), or a single-TRP scheme) may be configured / applied to the PDSCH. In each of the following embodiments, either an SFN scheme (e.g., scheme 1 for HST, TRP-based pre-compensation scheme for HST) or a non-SFN scheme (e.g., a multi-TRP scheme for NJCT / URLLC, or a single-TRP scheme) may be configured / applied to the PDCCH.

[0167] In the present disclosure, Scheme 1 (Scheme 1 for HST) and Scheme 1a (Scheme 1a for NJCT / URLLC) may be interpreted interchangeably.

[0168] First Embodiment This embodiment relates to restricting the SFN configuration (SFN or non-SFN configuration) of the PDCCH / PDSCH on each CC in the CC list.

[0169] Aspect 1a The PDCCH and PDSCH on the same CC may follow one of the following aspects 1a-1 to 1a-2. In Fig. 3, CC list #1 includes CC #1 and CC #2. In this figure, aspect 1a may be relationship #a between CORESET #1 and #2 on CC #1 and the PDSCH (SFN settings are the same or different), or relationship #a between CORESET #1 and #2 on CC #2 and the PDSCH (SFN settings are the same or different).

[0170] [Aspect 1a-1] For PDCCH and PDSCH on the same CC, the SFN configuration (SFN or non-SFN configuration) is the same. The SFN in this case may follow either of options 1 and 2 below. [[Option 1]] The SFN configuration for PDCCH and PDSCH on the same CC may be the same SFN scheme (Scheme 1 or TRP-based pre-compensation scheme). [[Option 2]] The SFN configuration for PDCCH and PDSCH on the same CC may be SFN (either Scheme 1 or TRP-based pre-compensation scheme).

[0171] [Aspect 1a-2] For the PDCCH and PDSCH on the same CC, the SFN configuration (SFN or non-SFN configuration) may be different. For example, the PDCCH may be SFN and the PDSCH may be non-SFN, or the PDCCH may be non-SFN and the PDSCH may be SFN.

[0172] Aspect 1b When an SFN PDCCH is configured (for at least one CORESET), multiple PDCCHs / multiple CORESETs on the same CC may follow any of the following aspects 1b-1 to 1b-3. In Fig. 3, aspect 1b may be relationship #b between CORESETs #1 and #2 on CC #1 (SFN configurations are the same or different), or relationship #b between CORESETs #1 and #2 on CC #2 (SFN configurations are the same or different).

[0173] [Aspect 1b-1] All CORESETs may be set to SFN, in which case the SFN may follow either option 1 or 2 below. [[Option 1]] The same SFN scheme (Scheme 1 or TRP-based pre-compensation scheme) is configured for all CORESETs. [[Option 2]] Scheme 1 may be set for some CORESETs, and the TRP-based pre-compensation scheme may be set for some CORESETs.

[0174] [Aspect 1b-2] An SFN may be set for some CORESETs, and a non-SFN may be set for some CORESETs.

[0175] [Aspect 1b-3] According to aspect 1b-2, a restriction on a CORESET configured as a non-SFN or an SFN is added. For example, a non-SFN can be configured as CORESET#0, and a CORESET of a common search space (CSS) or SS type#x (type#x-PDCCH CSS set) can be configured as a non-SFN.

[0176] The SFN configured PDCCH configuration (Scheme 1 or TRP-based pre-compensation scheme) may be indicated by new RRC parameters for the CC or may be indicated implicitly by the MAC CE when at least one CORESET is activated with two TCI states.

[0177] Aspect 1c The PDCCH / CORESET across CCs in the CC list for simultaneous control for each CC list may follow one of the following aspects 1c-1 to 1c-2. In Fig. 4, CC list #1 includes CC #1 and CC #2. In this figure, aspect 1c may be relationship #c (SFN configuration is the same or different) between CORESET #1 and #2 on CC #1 and CORESET #1 and #2 on CC #2.

[0178] [Aspect 1c-1] For all CCs, the SFN configuration (SFN or non-SFN configuration) is the same.

[0179] [Aspect 1c-2] The SFN setting (SFN or non-SFN setting) may be different for CORESETs from different CCs. For example, SFN may be set for CORESET on CC#1, and non-SFN may be set for CORESET on CC#2.

[0180] Aspect 1d A CORESET with the same CORESET ID across CCs in the CC list may follow one of the following aspects 1d-1 to 1d-2. In Fig. 4, aspect 1d may be relationship #d between CORESET#1 on CC#1 and CORESET#1 on CC#2 (SFN settings are the same or different), or relationship #d between CORESET#2 on CC#1 and CORESET#2 on CC#2 (SFN settings are the same or different).

[0181] [Aspect 1d-1] The SFN setting (SFN or non-SFN setting) for CORESETs with the same CORESET ID across CCs in the CC list is the same.

[0182] [Aspect 1d-2] The SFN settings (SFN or non-SFN settings) for CORESETs with the same CORESET ID across CCs in the CC list may be different, for example, SFN (activated with two TCI states) may be set for CORESET#1 on CC#1, and non-SFN (activated with one TCI state) may be set for CORESET#1 on CC#2.

[0183] Aspect 1e The PDSCH across CCs in the CC list for simultaneous control for each CC list may follow one of the following examples 1e-1 to 1e-2. In Fig. 4, example 1e may be the relationship #c between the PDSCH on CC#1 and the PDSCH on CC#2.

[0184] [Aspect 1e-1] For all CCs, the SFN configuration (SFN or non-SFN configuration) is the same.

[0185] [Aspect 1e-2] The SFN configuration (SFN or non-SFN configuration) may be different for PDSCHs from different CCs. For example, SFN may be configured for PDSCHs on CC#1, and non-SFN may be configured for PDSCHs on CC#2.

[0186] If PDCCH / PDSCH on different CCs in a CC list are configured with the same scheme for a CORESET with a specific CORESET ID#x, the CORESET may be configured / activated with a different number of TCI states (SFN configuration (SFN or non-SFN configuration)) on different CCs. SFN PDCCH / SFN CORESET does not mean that all CORESETs on that CC are configured with two TCI states, as described in aspect 1d-2. A constraint may be specified that all CORESETs on one CC are configured with the same SFN scheme (scheme 1 or TRP-based pre-compensation scheme).

[0187] According to this embodiment, the UE can appropriately determine the scheme for PDCCH / PDSCH on each CC in the CC list.

[0188] <Second embodiment> This embodiment relates to a TCI state update for PDCCH, especially when a MAC CE activates / deactivates two TCI states for one CORESET.

[0189] If the UE receives a new MAC CE (e.g., a MAC CE specified in Rel. 17 or later) that activates two TCI states for one CORESET ID in one CC in the CC list, the UE may follow at least one of the following aspects 2-0 to 2-6.

[0190] 《Aspect 2-0》 The MAC CE applies to all CCs in its CC list. The MAC CE may update two TCI states for the same CORESET ID (the CORESET ID indicated by the MAC CE) on each CC in its CC list.

[0191] <<Aspect 2-1>> All CCs in the CC list have the same SFN setting (SFN or non-SFN setting), and the MAC CE is applied to all CCs in the CC list. For example, as in aspect 1c-1, each CC has an SFN setting for at least one CORESET (per CC).

[0192] If all CCs in the CC list do not have the same SFN configuration, this may be an error case for the UE, and the UE may apply aspects 2-4 / 2-5 described below.

[0193] <<Aspect 2-2>> Some CCs in the CC list may be configured with an SFN CORESET. Some CCs may be configured with a non-SFN CORESET (e.g., aspect 1c-2). The UE may follow any of options 1 to 3 below.

[0194] [Option 1] The MAC CE applies to all CCs in the CC list.

[0195] [Option 2] The MAC CE is applied to some CCs configured with an SFN CORESET, and is not applied to CCs configured with a non-SFN CORESET.

[0196] [Option 3] The MAC CE applies to some CCs configured with SFN CORESET. For CCs configured with non-SFN CORESET, the MAC CE may update one TCI state for the same CORESET ID on the CC. The one TCI state may be the TCI state with the lowest TCI state ID, or the first TCI state, or the second TCI state among two TCI states.

[0197] <<Aspect 2-3>> Based on aspects 2-1 / 2-2, the UE checks / determines the configuration of the same CORESET ID on other CCs in its CC list. The UE may follow one of the following options 1 to 2.

[0198] [Option 1] The MAC CE may apply to some CCs with a CORESET with the same CORESET ID that are activated with two TCI states, and may not apply to CCs with a CORESET with the same CORESET ID that are activated with one TCI state.

[0199] [Option 2] The MAC CE applies to some CCs activated with two TCI states and with a CORESET with the same CORESET ID. For CCs activated with one TCI state and with a CORESET with the same CORESET ID, the MAC CE may update one TCI state for the CORESET with the same CORESET ID on that CC. The one TCI state may be the TCI state with the lowest TCI state ID, or the first TCI state, or the second TCI state among the two TCI states indicated by the MAC CE.

[0200] In example 2-2, if the CC is configured with an SFN PDCCH, the CORESET may be updated to two TCI states even if the CORESET with the same CORESET ID on the CC is not activated with two TCI states. In example 2-3, the UE may check whether the CORESET with the same CORESET ID on each CC is activated with two TCI states, and determine whether to apply the MAC CE to each CC.

[0201] <<Aspect 2-4>> The MAC CE applies only to the indicated CC and not to other CCs in the CC list.

[0202] <<Aspect 2-5>> The MAC CE applies only to the indicated CC. For other CCs in the CC list, the MAC CE updates one TCI state for the CORESET with the same CORESET ID on each other CC. If two TCI states are indicated for the CORESET ID, the one TCI state may be the TCI state with the lowest TCI state ID, or the first TCI state, or the second TCI state.

[0203] <<Aspect 2-6>> The MAC CE includes a new field that indicates whether the MAC CE applies only to the indicated CC or to all CCs in the CC list. If the new field is 0, the MAC CE may apply only to the indicated CC. If the new field is 1, the MAC CE may apply to all CCs in the CC list. Also, the behavior when the new field is 1 and the behavior when the new field is 0 may be interchanged.

[0204] According to this embodiment, when a UE receives a MAC CE indicating two TCI states for a CORESET / PDCCH on a CC in a CC list, the UE can appropriately determine the TCI state of the CC in that CC list.

[0205] <Third embodiment> This embodiment relates to a TCI state update for PDCCH, especially when a MAC CE activates / deactivates one TCI state for one CORESET.

[0206] If at least one CC in the CC list is configured with an SFN CORESET and the UE receives an existing MAC CE (Rel.16 MAC CE / TCI States Indication for UE-specific PDCCH MAC CE) that activates one TCI state for a certain CORESET ID on a certain CC in the CC list, the UE may follow at least one of the following aspects 3-0 to 3-6.

[0207] 《Aspect 3-0》 The MAC CE applies to all CCs in its CC list. The MAC CE may update one TCI state for the same CORESET ID (the CORESET ID indicated by the MAC CE) on each CC in its CC list.

[0208] <<Aspect 3-1>> The MAC CE applies to CCs configured with a non-SFN CORESET and does not apply to CCs configured with an SFN CORESET.

[0209] <<Aspect 3-2>> The MAC CE applies to CCs configured with a non-SFN CORESET. For CCs configured with an SFN CORESET, the MAC CE may update one of the two TCI states to become the new TCI state (the indicated TCI state) and leave the other TCI state unchanged. The one TCI state may be the TCI state with the lowest TCI state ID, or the first TCI state, or the second TCI state.

[0210] <<Aspect 3-3>> Based on aspects 3-1 / 3-2, the UE checks / determines the configuration of the same CORESET ID on other CCs in its CC list. The UE may follow one of the following options 1 to 2.

[0211] [Option 1] The MAC CE may apply to some CCs with a CORESET with the same CORESET ID that are activated with one TCI state, and may not apply to CCs with a CORESET with the same CORESET ID that are activated with two TCI states.

[0212] [Option 2] The MAC CE applies to some CCs activated with one TCI state and with a CORESET with the same CORESET ID. For CCs activated with two TCI states and with a CORESET with the same CORESET ID, the MAC CE may update one of the two TCI states of the CORESET with the same CORESET ID on the CC to a new TCI state (the indicated TCI state) and leave the other TCI state unchanged. The one TCI state may be the TCI state with the lowest TCI state ID, or the first TCI state, or the second TCI state.

[0213] <<Aspect 3-4>> All CCs in the CC list have the same SFN configuration (SFN or non-SFN configuration). In this case, the UE may follow option 1 or 2 below.

[0214] [Option 1] This is an error case for the UE.

[0215] [Option 2] The MAC CE applies only to the indicated CC and not to other CCs in the CC list.

[0216] Aspects 3-5 If at least one CC in its CC list is configured with an SFN CORESET, the UE shall not expect to be indicated a TCI state for a CORESET on a CC in its CC list.

[0217] Aspects 3-6 The MAC CE includes a new field that indicates whether the MAC CE applies only to the indicated CC or to all CCs in the CC list. If the new field is 0, the MAC CE may apply only to the indicated CC. If the new field is 1, the MAC CE may apply to all CCs in the CC list. Also, the behavior when the new field is 1 and the behavior when the new field is 0 may be interchanged.

[0218] According to this embodiment, when a UE receives a MAC CE indicating one TCI state for a CORESET / PDCCH on a CC in a CC list, the UE can appropriately determine the TCI state of the CC in that CC list.

[0219] <Fourth embodiment> This embodiment relates to a TCI state update for PDSCH, especially when a MAC CE activates / deactivates one or two TCI states for one TCI codepoint.

[0220] When the UE receives a MAC CE to activate / deactivate one or two TCI states per TCI codepoint for a UE-specific PDSCH for an SFN PDSCH for a CC in the CC list, the UE may follow at least one of the following aspects 4-0 to 4-5.

[0221] 《Aspect 4-0》 The MAC CE applies to all CCs in its CC list. The MAC CE may update one or two TCI states for each TCI codepoint in the DCI.

[0222] <<Aspect 4-1>> All CCs in the CC list have the same SFN setting (SFN or non-SFN setting), and the MAC CE applies to all CCs in the CC list.

[0223] If all CCs in the CC list do not have the same SFN configuration, this may be an error case for the UE, and the UE may apply aspects 4-3 / 4-4 described below.

[0224] <<Aspect 4-2>> Some CCs in the CC list may be configured with SFN PDSCH. Some CCs may be configured with non-SFN PDSCH. The UE may follow one of options 1 to 3 below.

[0225] [Option 1] The MAC CE applies to all CCs in the CC list.

[0226] [Option 2] The MAC CE is applied to some CCs configured with SFN PDSCHs, but is not applied to CCs configured with non-SFN PDSCHs.

[0227] [Option 3] The MAC CE is applied to some CCs configured with SFN PDSCH. For CCs configured with non-SFN PDSCH, the UE may select / update one of two TCI states for each TCI codepoint for that CC. The one TCI state may be the TCI state with the lowest TCI state ID, the first TCI state, or the second TCI state among the two TCI states.

[0228] <<Aspect 4-3>> The MAC CE applies only to the indicated CC and not to other CCs in the CC list.

[0229] <<Aspect 4-4>> The MAC CE applies only to the indicated CC. For other CCs in the CC list, the UE selects / updates one TCI state for each TCI codepoint for that CC. If two TCI states are indicated for the TCI codepoint, the one TCI state may be the TCI state with the lowest TCI state ID, or the first TCI state, or the second TCI state among the two TCI states.

[0230] Aspects 4-5 The MAC CE includes a new field that indicates whether the MAC CE applies only to the indicated CC or to all CCs in the CC list. If the new field is 0, the MAC CE may apply only to the indicated CC. If the new field is 1, the MAC CE may apply to all CCs in the CC list. Also, the behavior when the new field is 1 and the behavior when the new field is 0 may be interchanged.

[0231] According to this embodiment, when a UE receives a MAC CE indicating one or two TCI states for one TCI codepoint for a PDSCH on a CC in a CC list, the UE can appropriately determine the TCI state of the CC in that CC list.

[0232] <Fifth embodiment> This embodiment relates to a TCI state update for PDSCH, especially when a MAC CE activates / deactivates one TCI state for one TCI codepoint.

[0233] If, in a CC list, at least one CC is configured with an SFN PDSCH and the UE receives a MAC CE that activates / deactivates one TCI state for a UE-specific PDSCH for each TCI codepoint in the DCI for a CC in the CC list, the UE may follow at least one of the following aspects 5-0 to 5-4.

[0234] 《Aspect 5-0》 The MAC CE applies to all CCs in its CC list. The MAC CE may update one TCI state for each TCI codepoint for each CC in its CC list.

[0235] <<Aspect 5-1>> The MAC CE applies to CCs configured with non-SFN PDSCHs, but not to CCs configured with SFN PDSCHs.

[0236] <<Aspect 5-2>> All CCs in the CC list have the same SFN configuration (SFN or non-SFN configuration). In this case, the UE may follow option 1 or 2 below.

[0237] [Option 1] This case is an error case for the UE. It may be specified that the UE is assumed to receive a MAC CE that activates / deactivates one or two TCI states per TCI codepoint for the UE-specific PDSCH.

[0238] [Option 2] The MAC CE applies only to the indicated CC and not to other CCs in the CC list.

[0239] Aspect 5-3 If at least one CC in that CC list is configured with an SFN for a PDSCH, the UE shall not expect to be indicated a TCI state for a PDSCH on a CC in that CC list.

[0240] Aspect 5-4 The MAC CE includes a new field that indicates whether the MAC CE applies only to the indicated CC or to all CCs in the CC list. If the new field is 0, the MAC CE may apply only to the indicated CC. If the new field is 1, the MAC CE may apply to all CCs in the CC list. Also, the behavior when the new field is 1 and the behavior when the new field is 0 may be interchanged.

[0241] In this embodiment, the SFN PDSCH may be replaced with a multi-TRP for NJCT / URLLC.

[0242] According to this embodiment, when a UE receives a MAC CE indicating one TCI state for one TCI codepoint for a PDSCH on a CC in a CC list, the UE can appropriately determine the TCI state of the CC in that CC list.

[0243] Sixth Embodiment This embodiment relates to updating the common TCI state / unified TCI state.

[0244] For CCs in the CC list, the common TCI state may comply with at least one of the following aspects 6-1 to 6-2.

[0245] <<Aspect 6-1>> The CCs in the CC list have the new (Rel. 17 and later) common (uniform) TCI state settings. New (Rel. 17 and later) RRC parameters for the CC list (new CC list) may be configured. The new CC list may indicate only CCs that do not have the existing (Rel. 15 / 16) TCI state configured for PDSCH / PDCCH, etc.

[0246] The common TCI state may be in accordance with any of the following aspects 6-1-1 to 6-1-3. [Aspect 6-1-1] For the CCs in that CC list, the common TCI state is a joint DL / UL common setting (TCI state setting common to DL and UL). [Aspect 6-1-2] For the CCs in the CC list, the common TCI state is a separate DL / UL common setting (separate (independent) TCI state settings for DL ​​and UL). [Aspect 6-1-3] Some CCs in the CC list have joint DL / UL common settings, some CCs in the CC list have separate DL / UL common settings, and no CC in the CC list may have the existing (Rel. 16) TCI state setting.

[0247] Aspect 6-2 Some CCs in the CC list are configured with new common TCI state settings (eg, joint common TCI state, separate common TCI state), and some CCs in the CC list are configured with existing TCI state settings.

[0248] For CCs in the CC list with the configuration of aspect 6-1-1, the UE may assume that it receives a MAC CE that activates / deactivates a joint common TCI state for DL ​​and UL. Receipt of other MAC CEs that activate / deactivate TCI states for other TCI configurations may be an error case.

[0249] For CCs in the CC list with the configuration of aspect 6-1-2, the UE may assume that it receives a MAC CE that activates / deactivates separate common TCI states for DL ​​and UL. Receipt of other MAC CEs that activate / deactivate TCI states for other TCI configurations may be an error case.

[0250] When the UE receives a MAC CE for a purpose for a CC in the CC list with the configuration of aspect 6-1-3, the UE may follow one of the following options 0 to 6. The purpose may be, for example, activation / deactivation of a joint common TCI state or activation / deactivation of a separate common TCI state.

[0251] [Choice 0] For the setting of aspect 6-1-3, reception of the MAC CE is an error case.

[0252] [Option 1] The MAC CE applies to all CCs in the CC list.

[0253] [Option 2] The MAC CE is applied to some CCs configured with the same TCI setting as the indicated CC, and is not applied to CCs configured with a different TCI setting than the indicated CC.

[0254] [Option 3] The MAC CE is applied to some CCs configured with the same TCI setting as the indicated CC. For CCs configured with a different TCI setting than the indicated CC, the MAC CE is applied according to a certain method, which may be, for example, updating only the DL TCI state or only the UL TCI state.

[0255] [Option 4] The MAC CE may be applied only to the designated CC and not to other CCs, or the MAC CE may be applied to CCs other than the designated CC (other CCs) in the CC list and not to the designated CC.

[0256] [Option 5] The MAC CE is applied only to the indicated CC. For other CCs, the MAC CE is applied according to a certain method, which may be, for example, to update only the DL TCI state or only the UL TCI state.

[0257] [Option 6] The MAC CE includes a new field that indicates whether the MAC CE applies only to the indicated CC or to all CCs in the CC list. If the new field is 0, the MAC CE may apply only to the indicated CC. If the new field is 1, the MAC CE may apply to all CCs in the CC list.

[0258] For CCs in the CC list with the configuration of aspect 6-2, the UE may follow one of the following options 0 to 6. The purpose may be, for example, activation / deactivation of a joint common TCI state, activation / deactivation of a separate common TCI state, or activation / deactivation of an existing TCI state.

[0259] [Choice 0] For the setting of aspect 6-2, reception of the MAC CE is an error case.

[0260] [Option 1] The MAC CE applies to all CCs in the CC list.

[0261] [Option 2] The MAC CE is applied to some CCs configured with the same TCI setting as the indicated CC, and is not applied to CCs configured with a different TCI setting than the indicated CC.

[0262] [Option 3] The MAC CE is applied to some CCs configured with the same TCI setting as the indicated CC. For CCs configured with a different TCI setting than the indicated CC, the MAC CE is applied according to a certain method, which may be, for example, updating only the DL TCI state or only the UL TCI state.

[0263] [Option 4] The MAC CE may be applied only to the designated CC and not to other CCs, or the MAC CE may be applied to CCs other than the designated CC (other CCs) in the CC list and not to the designated CC.

[0264] [Option 5] The MAC CE is applied only to the indicated CC. For other CCs, the MAC CE is applied according to a certain method, which may be, for example, to update only the DL TCI state or only the UL TCI state.

[0265] [Option 6] The MAC CE includes a new field that indicates whether the MAC CE applies only to the indicated CC or to all CCs in the CC list. If the new field is 0, the MAC CE may apply only to the indicated CC. If the new field is 1, the MAC CE may apply to all CCs in the CC list.

[0266] According to this embodiment, when a UE receives a MAC CE indicating a common (uniform) TCI state on a CC in a CC list, the UE can appropriately determine the TCI state of the CC in that CC list.

[0267] <Other embodiments> Variations In the fourth and fifth embodiments, SFN PDSCH may be read as multi-TRP (multi-TRP repetition) for NJCT / URLLC. In this case, SFN and non-SFN may be read as multi-TRP and single-TRP, respectively. In this case, SFN configuration (SFN or non-SFN configuration) may be read as TRP configuration (multi-TRP or single-TRP configuration).

[0268] 《UE capability information / upper layer parameters》 Higher layer parameters (RRC IEs) / UE capabilities corresponding to the functions (features) in each of the above embodiments may be defined. The higher layer parameters may indicate whether the functions are enabled. The UE capabilities may indicate whether the UE supports the functions.

[0269] A UE for which a corresponding upper layer parameter is configured may perform the function. Alternatively, it may be specified that a UE for which a corresponding upper layer parameter is not configured shall not perform the function (for example, in accordance with Rel. 15 / 16).

[0270] A UE that reports / transmits a UE capability indicating that it supports the function may perform the function. It may also be specified that "a UE that does not report a UE capability indicating that it supports the function shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0271] If the UE reports / transmits a UE capability indicating that it supports the function and the corresponding upper layer parameter is configured, the UE may perform the function. It may also be specified that "if the UE does not report / transmit a UE capability indicating that it supports the function or if the corresponding upper layer parameter is not configured, the UE shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0272] Which embodiment / option / choice / function of the above multiple embodiments is used may be configured by higher layer parameters, may be reported by the UE as a UE capability, may be specified in a specification, or may be determined by the reported UE capability and the configuration of higher layer parameters.

[0273] The UE capabilities may indicate whether it supports at least one of the following functions: · Same or different SFN settings for PDCCH / PDSCH on the same CC or across multiple CCs. · Receipt of a MAC CE activating two TCI states for a CORESET ID for a CC in a CC list, when at least one CC in the CC list is configured with an SFN CORESET. · Applying that MAC CE to multiple CCs (in that list). · Receipt of a MAC CE activating one TCI state for a CORESET ID for a CC in a CC list when all CCs in the CC list are configured with SFN CORESET. · Applying that MAC CE to multiple CCs (in that list). Receipt of a MAC CE activating one or two TCI states per TCI codepoint for a UE-specific PDSCH for a CC in a CC list, if at least one CC in the CC list is configured with an SFN PDSCH. · Applying that MAC CE to multiple CCs (in that list). Reception of a MAC CE activating one TCI state per TCI codepoint for a UE-specific PDSCH for a CC in a CC list when all CCs in the CC list are configured with SFN PDSCH. · Applying that MAC CE to multiple CCs (in that list). · Same or different TCI state settings across multiple CCs in a CC list. Receipt of MAC CE for a certain TCI setting for a certain purpose in the CC list. · Applying that MAC CE to multiple CCs (in that list).

[0274] The UE capabilities may be separate or combined UE capabilities for aspects 1a to 1e in the first embodiment.

[0275] The UE capabilities may be separate or combined UE capabilities for aspects 6-1 / 6-1-1 / 6-1-2 / 6-1-3 / 6-2 in the sixth embodiment.

[0276] The above UE capabilities / upper layer parameters allow the UE to achieve the above functions while maintaining compatibility with existing specifications.

[0277] (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.

[0278] 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 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).

[0279] 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.

[0280] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0281] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0282] 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 locations and numbers of the cells and user terminals 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.

[0283] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0284] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.

[0285] 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.

[0286] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0287] 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.

[0288] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0289] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0290] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0291] 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.

[0292] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0293] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0294] 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.

[0295] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0296] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0297] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0298] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0299] 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.

[0300] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted as DL-RS.

[0301] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0302] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0303] (base station) 6 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0304] 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.

[0305] 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.

[0306] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0307] 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.

[0308] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0309] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0310] 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.

[0311] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0312] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0313] The transceiver 120 (transmission processor 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0314] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0315] 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 .

[0316] 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.

[0317] 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.

[0318] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0319] 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.

[0320] The transceiver 120 may transmit a medium access control (MAC) control element (CE) that transmits a list of cells and activates one or more transmission configuration indication (TCI) states for a control resource set for a physical downlink control channel on one of the cells. The controller 110 may apply one or more active TCI states to one or more of the cells.

[0321] The transceiver 120 may transmit a medium access control (MAC) control element (CE) that transmits a list of a plurality of cells and activates one or more transmission configuration indication (TCI) states for a TCI codepoint for a physical downlink shared channel on one of the plurality of cells. The controller 110 may apply one or more active TCI states to one or more of the plurality of cells.

[0322] (user terminal) 7 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0323] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0324] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0325] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0326] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured from a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0327] 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.

[0328] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0329] 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.

[0330] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0331] The transceiver 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0332] The transceiver 220 (transmission processor 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0333] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0334] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0335] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0336] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0337] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0338] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0339] The transceiver 220 may receive a configuration of a sounding reference signal (SRS) resource set and may receive downlink control information including a plurality of instructions for SRS resources in the SRS resource set. The controller 210 may apply the instructions to a plurality of frequency portions used for non-codebook transmission of the physical uplink shared channel, respectively.

[0340] The number of the plurality of frequency portions may be Y. The downlink control information may include Y or Y / 2 fields for the SRS resources.

[0341] The physical uplink shared channel may include 2 codewords, the number of the frequency portions may be Y, and the downlink control information may include 2Y fields for the SRS resources.

[0342] Each SRS resource in the SRS resource set may use a portion of the bandwidth of the physical uplink shared channel.

[0343] The transceiver 220 may receive a list of cells (e.g., a CC list) and may receive a medium access control (MAC) control element (CE) that activates one or more transmission configuration indication (TCI) states for a control resource set (CORESET) for a physical downlink control channel (PDCCH) on one of the cells. The controller 210 may apply / determine one or more active TCI states for one or more of the cells.

[0344] The control unit 210 may determine the one or more cells and the one or more active TCI states based on at least one of a single frequency network (SFN) configuration, a repetition configuration of the physical downlink control channel, an ID of the control resource set, and the number of the one or more TCI states for the control resource set.

[0345] The SFN setting may be applied to all or some of the plurality of cells.

[0346] The one or more TCI conditions may be a common TCI condition.

[0347] The transceiver 220 may receive a list of cells (e.g., a CC list) and a medium access control (MAC) control element (CE) that activates one or more transmission configuration indication (TCI) states for a physical downlink shared channel (PDSCH) codepoint on one of the cells. The controller 210 may apply / determine one or more active TCI states for one or more of the cells.

[0348] The control unit 210 may determine the one or more cells and the one or more active TCI states based on at least one of a single frequency network (SFN) configuration, a repetition configuration of the physical downlink shared channel, and the number of the one or more TCI states for the TCI code point.

[0349] The SFN setting may be applied to all or some of the plurality of cells.

[0350] The one or more TCI conditions may be a common TCI condition.

[0351] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0352] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0353] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram 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.

[0354] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read 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.

[0355] 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.

[0356] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0357] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0358] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0359] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0360] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0361] 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.

[0362] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0363] 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.

[0364] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0365] (Variation) Note that terms explained in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0366] 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.

[0367] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0368] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0369] 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.

[0370] 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.

[0371] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0372] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0373] 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.

[0374] 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.

[0375] 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.

[0376] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0377] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0378] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0379] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0380] 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.

[0381] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0382] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0383] 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."

[0384] 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.

[0385] 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.

[0386] 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.

[0387] 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.

[0388] 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.

[0389] 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.

[0390] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0391] Note that the physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be called an RRC message, such as an RRC connection setup message or an RRC connection reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0392] 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).

[0393] 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).

[0394] 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.

[0395] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0396] 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).

[0397] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0398] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0399] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0400] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0401] 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.

[0402] 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.

[0403] 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.

[0404] 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.

[0405] 9 is a diagram showing an example of a vehicle according to an embodiment. As shown in FIG. 9, a 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.

[0406] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0407] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0408] 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.

[0409] 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 various types of 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 types of information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0410] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), Artificial Intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0411] 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.

[0412] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0413] The communication module 60 may transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49 and information obtained based on the signals to an external device via wireless communication.

[0414] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 59 provided in the vehicle. The communication module 60 also stores the various information received from the 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.

[0415] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0416] 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.

[0417] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0418] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the specific order presented.

[0419] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0420] 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."

[0421] 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.

[0422] 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.

[0423] 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.

[0424] Also, "decision" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "decision" may be considered to be "deciding" on some action.

[0425] Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," or the like.

[0426] 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.

[0427] 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."

[0428] 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.

[0429] 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."

[0430] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0431] 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.

[0432] 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 invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiver that receives first higher layer parameters that configure a list of multiple serving cells whose transmission configuration indication (TCI) states are updated simultaneously, and second higher layer parameters that configure settings for a single frequency network (SFN) scheme for a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH); a control unit that determines whether to apply the SFN scheme to a PDCCH and a PDSCH in each serving cell of the plurality of serving cells independently based on a setting of the second higher layer parameter; The control unit applies the same SFN scheme to the PDCCH and the PDSCH, The control unit applies the same SFN scheme to all control resource sets (CORESETs) in each serving cell.

2. A step of receiving first higher layer parameters that configure a list of multiple serving cells whose transmission configuration indication (TCI) states are updated simultaneously, and second higher layer parameters that configure a single frequency network (SFN) scheme for a physical downlink control channel (PDCCH) and a SFN scheme for a physical downlink shared channel (PDSCH); determining whether to apply the SFN scheme to a PDCCH and a PDSCH in each serving cell of the plurality of serving cells independently based on a configuration of the second higher layer parameter; applying the same SFN scheme to all control resource sets (CORESETs) in each serving cell; and applying the same SFN scheme to the PDCCH and the PDSCH.

3. A transmitter that transmits to a terminal first higher layer parameters that set a list of multiple serving cells whose transmission configuration indication (TCI) states are updated simultaneously, and second higher layer parameters that set settings for a single frequency network (SFN) scheme for a physical downlink control channel (PDCCH) and a SFN scheme for a physical downlink shared channel (PDSCH); a control unit that sets the second higher layer parameter to cause the terminal to perform control to determine whether or not to apply the SFN scheme independently to a PDCCH and a PDSCH in each serving cell of the plurality of serving cells, the control unit controlling the terminal to apply the same SFN scheme to the PDCCH and the PDSCH and to apply the same SFN scheme to all control resource sets (CORESET) in each serving cell.

4. A system including a terminal and a base station, The terminal a receiving unit for receiving first higher layer parameters for configuring a list of multiple serving cells whose transmission configuration indication (TCI) status is updated simultaneously, and second higher layer parameters for configuring a single frequency network (SFN) scheme for a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH); a control unit that determines whether to apply the SFN scheme to a PDCCH and a PDSCH in each serving cell of the plurality of serving cells independently based on a setting of the second higher layer parameter; The control unit applies the same SFN scheme to the PDCCH and the PDSCH, The control unit applies the same SFN scheme to all control resource sets (CORESETs) in each serving cell; The base station a transmitter that transmits the first upper layer parameter and the second upper layer parameter; a control unit that sets the second upper layer parameter to cause the terminal to perform control to determine whether to apply the SFN scheme independently to the PDCCH and the PDSCH in each serving cell of the plurality of serving cells, and a control unit that controls the terminal to apply the same SFN scheme to the PDCCH and the PDSCH and to apply the same SFN scheme to all CORESETs in each serving cell.

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