Terminal, wireless communication method, base station and system

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives indication of one or more active transmission configuration indication (TCI) states; and a control unit that, on the basis of the number of the one or more active TCI states and a physical cell ID (PCI) associated with one TCI state out of the one or more active TCI states, controls reception of a first downlink channel for at least one of paging, a short message, and system information, the first downlink channel being present within a control resource set with index 0. According to the one aspect of the present disclosure, communication can be appropriately performed even when utilizing a plurality of transmission points.

Description

Terminal, wireless communication method and base station

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

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

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

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

[0005] In future wireless communication systems (e.g., wireless communication systems after Rel. 16 / 5G), it is expected that communications will be controlled based on inter-cell mobility including non-serving cells, or inter-cell mobility using multiple transmission / reception points (e.g., Multi-TRP (MTRP)).

[0006] However, when communication is performed using a plurality of cells, a problem arises as to how to control reception of DL signals or transmission of UL signals according to the number of active transmission configuration indication (TCI) states.

[0007] The present disclosure has been made in consideration of such points, and one of its objectives is to provide a terminal, a wireless communication method, and a base station that are capable of communicating appropriately even when communicating using multiple transmission points.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives an indication of one or more active transmission configuration indication (TCI) states, and a control unit that controls reception of a first downlink channel for at least one of paging, short messages, and system information based on the number of the one or more active TCI states and a physical cell ID (PCI) associated with one of the one or more active TCI states, wherein the first downlink channel is in a control resource set with index 0.

[0009] According to one aspect of the present disclosure, communication can be performed appropriately even when communication is performed using multiple transmission points.

[0010] 1A and 1B are diagrams illustrating an example of inter-cell mobility. FIG. 2 is a diagram illustrating an example of UE operation according to the first and second embodiments. FIG. 3 is a diagram illustrating UE operation according to aspect 4-1. FIG. 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 5 is a diagram illustrating an example of a configuration of a base station according to an embodiment. FIG. 6 is a diagram illustrating an example of a configuration of a user terminal according to an embodiment. FIG. 7 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment. FIG. 8 is a diagram illustrating an example of a vehicle according to an embodiment.

[0011] (TCI, spatial relationship, QCL) In NR, it is 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 a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0012] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0013] 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.

[0014] The QCL is an index indicating the statistical properties of signals / channels. 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 a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial parameter (e.g., a spatial Rx parameter) is the same between these different signals / channels (i.e., the signals / channels have a QCL with respect to at least one of these).

[0015] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be identified based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with sQCL (spatial QCL).

[0016] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows: 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.

[0017] The UE's assumption 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.

[0018] 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.

[0019] The TCI state may be, for example, information about the QCL between the channel of interest (in other words, the Reference Signal (RS) for that 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.

[0020] 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, etc., or a combination thereof.

[0021] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The 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.

[0022] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0023] The channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS), or simply a target, and the other signal may be called a reference reference signal (reference RS), a source RS, or simply a reference.

[0024] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH).

[0025] Furthermore, the RS that has a QCL relationship with the channel may be at least one of, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), a QCL detection reference signal (also called a QRS), a demodulation reference signal (DMRS), etc.

[0026] An SSB is a signal block including 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.

[0027] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0028] (Inter-cell mobility) In NR, one or more transmission / reception points (Transmission / Reception Points (TRPs)) (multi-TRPs (MTRPs)) are considered to perform DL transmission to a UE. Also, it is considered that a UE performs UL transmission to one or more TRPs.

[0029] During inter-cell mobility (e.g., L1 / L2 inter cell mobility), a UE may receive channels / signals from multiple cells / TRPs (see Figures 1A and 1B).

[0030] FIG. 1A illustrates an example of inter-cell mobility (e.g., single-TRP inter-cell mobility) including a non-serving cell. A UE may be configured with one TRP (or a single TRP) in each cell. Here, the UE receives channels / signals from the base station / TRP of cell #1, which is the serving cell, and the base station / TRP of cell #3, which is not the serving cell (non-serving cell). For example, this corresponds to a case where the UE switches / switches from cell #1 to cell #3 (e.g., a fast cell switch).

[0031] In this case, the selection of the port (e.g., antenna port) / TRP may be performed dynamically or based on the TCI status indicated or updated by the DCI / MAC CE. Here, it is shown that different physical cell ID (e.g., PCI) configurations are supported for cell #1 and cell #3.

[0032] FIG. 1B illustrates an example of a multi-TRP scenario (e.g., multi-TRP inter-cell mobility). A UE may be configured with multiple (e.g., two) TRPs (or different CORESET pool indices) in each cell. Here, the UE receives channels / signals from TRP #1 and TRP #2. Also, here, TRP #1 corresponds to physical cell ID (PCI) #1, and TRP #2 corresponds to PCI #2.

[0033] The multi-TRPs (TRPs #1 and #2) may be connected via an ideal / non-ideal backhaul to exchange information, data, etc. The same or different code words (CWs) and the same or different layers may be transmitted from each TRP of the multi-TRP. As shown in FIG. 1B, non-coherent joint transmission (NCJT) may be used as one form of multi-TRP transmission. This example illustrates the case where NCJT is performed between TPRs corresponding to different PCIs. The same serving cell configuration may be applied / configured for TRPs #1 and #2.

[0034] Multiple PDSCHs (multi-PDSCHs) that are non-coherent may be defined as partially or completely overlapping in time and / or frequency domains. That is, the first PDSCH from TRP #1 and the second PDSCH from TRP #2 may overlap in time and / or frequency resources. The first PDSCH and the second PDSCH may be used for transmission of the same TB or different TBs.

[0035] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (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).

[0036] Multiple PDSCHs from multiple TRPs (which may be referred to as multiple PDSCHs) may be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single master mode). One DCI may be transmitted from one TRP of a multi-TRP. A configuration using one DCI in a multi-TRP may be referred to as single DCI-based multi-TRP (mTRP / MTRP).

[0037] Multiple PDSCHs from a multi-TRP may be scheduled using multiple DCIs (multiple DCI (M-DCI), multiple PDCCHs (multiple PDCCHs)), respectively (multiple master mode). Multiple DCIs may be transmitted from multiple TRPs, respectively. A configuration that utilizes multiple DCIs in a multi-TRP may be referred to as a multi-DCI-based multi-TRP (mTRP / MTRP).

[0038] It may be assumed that the UE transmits separate CSI reports (CSI reports) for different TRPs. Such CSI feedback may be referred to as separate feedback, separate CSI feedback, etc. In this disclosure, "separate" may be interchangeably read as "independent."

[0039] It is assumed that in Rel. 17 NR and later, the MAC CE / DCI will support beam direction to a TCI state associated with a different PCI, and that in Rel. 18 NR and later, the MAC CE / DCI will support direction of a serving cell change to a cell with a different PCI.

[0040] (Serving Cell / Non-Serving Cell) The number of physical cell IDs (e.g., supported / active PCIs) supported / activated for a UE in communication may be determined based on the UE capability. For example, the number of PCIs X supported by the UE may be reported as UE capability information. X may be, for example, 1 to 7. Also, the supported / activated physical cell IDs may be associated with an active TCI state.

[0041] <Option 1> If the number of supported / activated PCIs is 1, the UE may activate a TCI state associated with one PCI (e.g., either a serving cell or a non-serving cell). That is, if the number of supported PCIs is 1, the MAC CE can switch between serving and non-serving cells. If there are more than 1 supported TCI states, the TCI state field may indicate one of the active TCI states associated with different PCIs. The TCI state field may be a field included in the DCI.

[0042] <Option 2> Alternatively, if the number of supported / activated PCIs is 1, the UE may activate TCI states related to the serving cell only, i.e., if the number of supported PCIs is 1, L1 / L2 inter-cell mobility is not supported (e.g., MAC CE is not supported to switch serving or non-serving cells). If there are more than 1 supported TCI states, the TCI state field may indicate one of the active TCI states associated with different PCIs.

[0043] Information (e.g., information type, content) that can be transmitted from a non-serving cell to a UE is being studied. For example, it is being studied that system information is transmitted only from the serving cell (e.g., the UE receives system information only from the serving cell). On the other hand, it is being studied that other information (e.g., paging information / short messages) is transmitted from non-serving cells in addition to the serving cell, or transmitted only from the serving cell.

[0044] In existing systems (e.g., Rel. 16 and earlier), after a UE receives a paging / short message, the UE is controlled to receive system information. For example, if the UE supports ETWS (Earthquake and Tsunami Warning System)-compatible UE capabilities, the UE is controlled to acquire a predetermined system information block (e.g., SIB6 / SIB7) after receiving a short message.

[0045] Assume that the UE supports / activates only one cell / PCI (e.g., a PCI corresponding to either the serving cell or a non-serving cell), or the UE supports only one active TCI state.

[0046] Regarding the Rel. 17 TCI state (QCL assumption of PDCCH), the unified / common TCI state may refer to the Rel. 17 TCI state indicated using (Rel. 17) DCI / MAC CE / RRC. In the present disclosure, the indicated Rel. 17 TCI state may be interchangeably read as the indicated TCI state and the common TCI state.

[0047] The indicated Rel. 17 TCI state may be shared with at least one of the UE-specific reception of PDSCH / PDCC (updated using Rel. 17 DCI / MAC CE / RRC), PUSCH of dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The TCI state indicated by DCI / MAC CE / RRC may be referred to as the common TCI state.

[0048] Regarding the Rel. 17 TCI state, a TCI state other than the unified / common TCI state may refer to a Rel. 17 TCI state configured using (Rel. 17) MAC CE / RRC. In the present disclosure, the term "configured Rel. 17 TCI state" may be interchangeably read as a configured TCI state or a TCI state other than the common TCI state.

[0049] The configured Rel. 17 TCI state may not be shared with at least one of UE-specific reception in PDSCH / PDCC (updated using Rel. 17 DCI / MAC CE / RRC), PUSCH of dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The configured Rel. 17 TCI state may be configured by RRC / MAC CE for each CORESET / resource / resource set, and may not be updated even if the indicated Rel. 17 TCI state (common TCI state) is updated.

[0050] <CORESET #0> In Rel. 15, whether to instruct the TCI state for CORESET #0 was up to the implementation of the base station. In Rel. 15, for CORESET #0 for which a TCI state is instructed, the instructed TCI state is applied. For CORESET #0 for which a TCI state is not instructed, the SSB and QCL selected at the time of the latest (most recent) PRACH transmission are applied.

[0051] In the common TCI state framework for Rel. 17 and later, the TCI state for CORESET #0 is considered.

[0052] For example, in the framework of common TCI states for Rel. 17 and later, whether or not to apply the indicated Rel. 17 TCI state associated with the serving cell for the Rel. 17 TCI state indication in CORESET #0 is configured by RRC for each CORESET, and if not, the legacy MAC CE / RACH signaling mechanism may be used.

[0053] Note that the CSI-RS associated with the Rel. 17 TCI state applied to CORESET #0 may be QCL with the SSB associated with the serving cell PCI (physical cell ID) (similar to Rel. 15). CORESET #0 may support only CSS configuration, or both CSS and USS configuration. Alternatively, only USS configuration may be supported.

[0054] However, the relationship between the number of active TCI states and UE behavior is unclear, for example, whether the UE receives paging / short messages. If such behavior is unclear, it may lead to degradation of communication quality / throughput.

[0055] Therefore, the inventors of the present invention have studied UE operation with respect to the number of active TCI states and have come up with an aspect of this embodiment.

[0056] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that each of the following aspects (e.g., each case) may be used alone or in combination of at least two of them.

[0057] 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."

[0058] In the present disclosure, terms such as activate, deactivate, 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.

[0059] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0060] 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, etc., or a combination thereof.

[0061] 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.

[0062] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0063] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0064] In the present 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.

[0065] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information" may be interchangeable with "set of spatial relationship information," "one or more pieces of spatial relationship information," etc. The TCI state and the TCI may be interchangeable with each other.

[0066] (Wireless communication method) In each embodiment, a specific DL channel, a first PDSCH, a first downlink channel, a specific DL channel from a serving cell, paging / short message / system information (SI) from a serving cell, a DL channel related to paging / short message / system information (SI), a PDSCH scheduled by a DCI with a CRC scrambled by a P-RNTI, and a PDCCH / DCI with a CRC scrambled by a P-RNTI may be read as interchangeable.

[0067] In each embodiment, DL signal / UL signal, non-serving cell signal, second PDSCH, second downlink channel, DL signal from a non-serving cell, UL signal to a non-serving cell, PDCCH / PDSCH / CSI-RS / SSB / PUCCH / PUSCH / SRS with a TCI state associated with a PCI different from the PCI of the serving cell may be read as interchangeable.

[0068] In each embodiment, the terms Rel. 17 TCI state, indicated TCI state, Rel. 15 / 16 TCI state, unified TCI state, and common TCI state may be interchangeable.

[0069] In each embodiment, CORESET 0, CORESET#0, and CORESET with index 0 may be read interchangeably.

[0070] In each embodiment, "CORESET 0 is QCL'd with the SSB selected at the time of the last RACH transmission," "The UE assumes that the DMRS port for PDCCH reception in CORESET 0 is QCL'd with the SSB that the UE identified during the latest (most recent) random access procedure," and "The QCL assumption for CORESET 0 is the SSB selected at the time of the last RACH transmission" may be read interchangeably.

[0071] FIG. 2 shows UE operation according to the first and second embodiments.

[0072] First Embodiment This embodiment relates to the case where one TCI state is activated (S111: Y).

[0073] If the UE is activated with one TCI state associated with a non-serving cell, it may not be required to monitor paging / short messages / system information (SI) (S112).

[0074] According to this embodiment, the UE can properly control reception even if one TCI state associated with a non-serving cell is activated.

[0075] Second Embodiment This embodiment relates to the case where more than one TCI state is activated (S111:N).

[0076] A UE activated with more than one TCI state may follow at least one of the following actions 1 and 2. [Action 1] If the symbols of paging / short message / system information (SI) from the serving cell do not overlap with the symbols of DL signals from non-serving cells (S121: Y), the UE receives both the paging / short message / SI from the serving cell and the DL signals from non-serving cells (S122). [Action 2] If the symbols of paging / short message / system information (SI) from the serving cell overlap with the symbols of DL signals from non-serving cells (S121: N), the UE receives the paging / short message / SI from the serving cell (S123).

[0077] According to this embodiment, the UE can control reception appropriately even if more than one TCI state is activated.

[0078] For the first and second embodiments, specific example 1-1 for PDSCH reception related to paging / short messages and specific example 1-2 for PDCCH reception related to paging / short messages are shown below.

[0079] <Example 1-1: PDSCH> When receiving a PDSCH scheduled with system information (SI)-radio network temporally identifier (RNTI), paging (P)-RNTI, broadcast group (G)-RNTI, or multicast control channel (MCCH)-RNTI, if the associated SS / PBCH block is available in terms of Doppler shift, Doppler spread, mean delay, delay spread, and spatial RX parameters, the DMRS port of the PDSCH may be assumed to be quasi-colocated with the SS / PBCH block. A UE with a TCI state configured and activated with a Rel. 17 TCI State ID (e.g., tci-StateId_r17) may perform at least one of the following actions a1 to a3. [Action a1] If a UE is activated with one TCI state and the active TCI state is associated with a PCI different from the PCI of its serving cell (non-serving cell PCI), the UE is not required to receive a PDSCH scheduled by a DCI with a cyclic redundancy check (CRC) scrambled by a P-RNTI. [Action a2] Otherwise, if a UE is activated with more than one TCI state and at least one active TCI state (among the more than one TCI states) is associated with a PCI different from the PCI of its serving cell, the UE receives both a PDSCH scheduled by a DCI with a CRC scrambled by a P-RNTI and a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of its serving cell on different symbols.[Action a3] Otherwise, if the UE is activated with more than one TCI state, and at least one active TCI state (among the more than one TCI state) is associated with a PCI different from the PCI of its serving cell, and a PDSCH scheduled by a DCI with a CRC scrambled by the P-RNTI and a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of its serving cell are received (transmitted) on the same symbol, the UE receives the PDSCH scheduled by a DCI with a CRC scrambled by the P-RNTI.

[0080] At least one of actions a1 to a3 may be applied only to L1 / L2 inter-cell mobility using Rel. 17 TCI states, or may be applied to M-TRP inter-cell mobility using Rel. 15 / 16 TCI states.

[0081] In the case applied to M-TRP inter-cell mobility, the UE may be activated with more than one TCI state.

[0082] In the case applied to M-TRP inter-cell mobility, the UE is capable of receiving two different QCL type D from two TRPs and may follow either of the following options 1 and 2 for receiving paging / short messages: [Option 1] The UE follows at least one of actions a1 to a3. [Option 2] The UE receives both a PDSCH scheduled by a DCI with CRC scrambled by the P-RNTI and a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of its serving cell.

[0083] In cases applied to M-TRP inter-cell mobility, the network may update the SI via individual configuration or via switching to a primary TRP (pTRP) for SI reception.

[0084] In operation a2, "if the UE is activated with more than one TCI state and at least one active TCI state (among the more than one TCI states) is associated with a PCI different from the PCI of the serving cell" may be read as "if the UE is activated with more than one TCI state and at least one active TCI state (among the more than one TCI states) is associated with a PCI different from the PCI of the serving cell and at least one other active TCI state (among the more than one TCI states) is associated with the PCI of the serving cell."

[0085] "PDCCH / PDSCH / CSI-RS" in operation a2 / a3 may be read as "PDCCH / PDSCH." "The UE receives both the PDSCH scheduled by DCI with CRC scrambled by P-RNTI and the PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of the serving cell on different symbols" in operation a2 may be read as "The UE receives both the PDSCH scheduled by DCI with CRC scrambled by P-RNTI and receives / transmits the PDCCH / PDSCH / CSI-RS / SSB / PUCCH / PUSCH / SRS with a TCI state associated with a PCI different from the PCI of the serving cell on different symbols."

[0086] Only UEs that have reported UE capabilities for operation a3 may support operation a3.

[0087] In operation a3, “the UE receives a PDSCH scheduled by a DCI with a CRC scrambled by the P-RNTI” may be read as “the UE receives a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of the serving cell.” The RRC IE may configure whether a PDSCH scheduled by a DCI with a CRC scrambled by the P-RNTI or a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of the serving cell is received.

[0088] <Specific Example 1-2: PDCCH> It may be specified that a UE does not assume to detect, within the same PDCCH monitoring occasion, a DCI format with a CRC scrambled by an SI-RNTI, a random access (RA)-RNTI, a message B (MsgB)-RNTI, a temporarily cell (TC)-RNTI, a P-RNTI, a cell (C)-RNTI, a configured scheduling (CS)-RNTI, or a modulation and coding scheme (MCS)-C-RNTI, and a DCI format with a CRC scrambled by a sidelink (SL)-RNTI or an SL-CS-RNTI for scheduling corresponding PDSCH reception and PSSCH transmission on the same serving cell.

[0089] A UE with a TCI state configured and activated with a Rel. 17 TCI State ID (e.g., tci-StateId_r17) may follow at least one of the following actions b1 to b3: [Action b1] If a UE is activated with one TCI state and the active TCI state is associated with a PCI different from the PCI of its serving cell, the UE is not required to monitor (receive) a PDCCH (DCI) with CRC scrambled by the P-RNTI. [Action b2] Otherwise, if the UE is activated with more than one TCI state and at least one active TCI state (among the more than one TCI states) is associated with a PCI different from the PCI of its serving cell, the UE monitors (receives) both a PDCCH (DCI) with a CRC scrambled by the P-RNTI and a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of its serving cell on different symbols. [Action b3] Otherwise, if the UE is activated with more than one TCI state, and at least one active TCI state (among the more than one TCI state) is associated with a PCI different from the PCI of its serving cell, and a PDCCH (DCI) with a CRC scrambled by the P-RNTI and a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of its serving cell are received (transmitted) on the same symbol, the UE monitors (receives) the PDCCH (DCI) with a CRC scrambled by the P-RNTI.

[0090] At least one of actions b1 to b3 may be applied only to L1 / L2 inter-cell mobility using Rel. 17 TCI states or to M-TRP inter-cell mobility using Rel. 15 / 16 TCI states.

[0091] In the case applied to M-TRP inter-cell mobility, the UE may be activated with more than one TCI state.

[0092] In the case applied to M-TRP inter-cell mobility, the UE is capable of receiving two different QCL type D from two TRPs and may follow either of the following options 1 and 2 for receiving paging / short messages: [Option 1] The UE follows at least one of actions b1 to b3. [Option 2] The UE monitors (receives) both a PDCCH (DCI) with CRC scrambled by the P-RNTI and a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of its serving cell.

[0093] In cases applied to M-TRP inter-cell mobility, the network may update the SI via individual configuration or via switching to a primary TRP (pTRP) for SI reception.

[0094] In operation b1, "the UE is not required to monitor (receive) a PDCCH (DCI) with a CRC scrambled by the P-RNTI" may be read as "the UE is not required to monitor (receive) any PDCCH associated with the PCI of the serving cell."

[0095] In operation b2, "if the UE is activated with more than one TCI state and at least one active TCI state (among the more than one TCI states) is associated with a PCI different from the PCI of the serving cell" may be read as "if the UE is activated with more than one TCI state and at least one active TCI state (among the more than one TCI states) is associated with a PCI different from the PCI of the serving cell and at least one other active TCI state (among the more than one TCI states) is associated with the PCI of the serving cell."

[0096] "PDCCH / PDSCH / CSI-RS" in operation b2 / b3 may be read as "PDCCH / PDSCH." "The UE monitors (receives) both the PDCCH (DCI) with CRC scrambled by the P-RNTI and the PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of the serving cell on different symbols" in operation b2 may be read as "The UE monitors (receives) the PDCCH (DCI) with CRC scrambled by the P-RNTI and receives / transmits the / SSB / PUCCH / PUSCH / SRS with a TCI state associated with a PCI different from the PCI of the serving cell on different symbols."

[0097] Only UEs that have reported UE capabilities for operation b3 may support operation a3.

[0098] In operation b3, "the UE monitors (receives) a PDCCH (DCI) with a CRC scrambled by the P-RNTI" may be read as "the UE receives a PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of the serving cell." The RRC IE may configure which of the PDCCH (DCI) with a CRC scrambled by the P-RNTI and the PDCCH / PDSCH / CSI-RS with a TCI state associated with a PCI different from the PCI of the serving cell is monitored (received).

[0099] According to this embodiment, the mode of TCI status indication can be set / indicated appropriately.

[0100] Analysis: It is considered that if the UE indicated Rel. 17 TCI state is associated with a non-serving cell PCI, the indicated Rel. 17 TCI state does not apply to CORESET 0.

[0101] It is considered that if the TCI state associated with the serving cell PCI is indicated for CORESET 0 and one active TCI state in the first embodiment / action b1 is associated with a non-serving cell PCI (corresponding to the TCI state associated with the non-serving cell PCI), then a total of two TCI states are required. It is also considered that the minimum UE capability for L1 / L2 inter-cell mobility is to support up to one active TCI state (the maximum number of active TCI states is 1).

[0102] If the TCI state for CORESET 0 is not indicated by the MAC CE (CORESET 0 is QCL'd with the SSB selected at the time of the last RACH transmission), it is unclear whether the TCI state / QCL assumptions for CORESET 0 are included in the count of Rel. 17 active TCI states.

[0103] Therefore, the following third and fourth embodiments may be applied.

[0104] Third Embodiment This embodiment relates to the operation when the TCI state for CORESET 0 is not indicated by the MAC CE (CORESET 0 is QCL'd with the SSB selected at the time of the last RACH transmission).

[0105] <<Aspect 3-1>> When the TCI state for CORESET 0 is not indicated by the MAC CE (CORESET 0 is QCL'd with the SSB selected at the time of the last RACH transmission), the TCI state / QCL assumption for CORESET 0 may be included in the count of the Rel. 17 active TCI state (may be counted together with the Rel. 17 active TCI state).

[0106] <<Aspect 3-2>> If the TCI state for CORESET 0 is not indicated by the MAC CE (CORESET 0 is QCL'd with the SSB selected at the time of the last RACH transmission), the TCI state / QCL assumption for CORESET 0 may not be included in the count of Rel. 17 active TCI states (may not be counted together with the Rel. 17 active TCI states).

[0107] A UE with one activated TCI state may assume that CORESET 0 is QCL with the SSB selected at the time of the last RACH transmission. The one TCI state may be a TCI state for DL ​​signals other than CORESET 0 (e.g., CORESET other than CORESET 0, PDSCH) and may indicate a Rel. 17 TCI state associated with a non-serving cell. In this case, the UE can receive both paging / short messages / SI from the serving cell and DL signals from the non-serving cell.

[0108] According to this embodiment, the UE can operate properly even if the TCI state for CORESET 0 is not indicated by the MAC CE.

[0109] <Fourth embodiment> This embodiment relates to control of reception of PDCCH / PDSCH related to paging / short message / SI.

[0110] <<Aspect 4-1>> When no TCI state for CORESET 0 is activated / indicated, even if one active TCI state is indicated and the one active TCI state is associated with a non-serving cell, the UE may receive PDCCH / PDSCH related to paging / short message / SI from the serving cell.

[0111] Figure 3 shows a UE operation according to aspect 4-1. The UE operation in Figure 3 performs S112a instead of S112 in the UE operation in Figure 2. In S112a (S111: Y), the UE may be required to monitor a specific DL channel for paging / short message / system information only if the specific DL channel uses CORESET 0 without a TCI status indication (S112a). Here, if the specific DL channel for paging / short message / system information does not use CORESET 0 without a TCI status indication (if it uses CORESET 0 with a TCI status indication or if it uses a CORESET other than CORESET 0), the UE may not be required to monitor the specific DL channel.

[0112] <<Aspect 4-2>> When a TCI state for CORESET 0 is activated / indicated, if one active TCI state is indicated and the one active TCI state is associated with a non-serving cell, the UE may not receive PDCCH / PDSCH related to paging / short message / SI from the serving cell.

[0113] In the case where a TCI state for CORESET 0 is activated / indicated, it may be specified that a UE that supports (has reported UE capability) up to one active TCI state (the maximum number of active TCI states is 1) shall not expect the TCI states associated with non-serving cells to be activated.

[0114] According to this embodiment, the UE can operate properly for PDCCH / PDSCH related to paging / short message / SI.

[0115] For the first / second embodiment, aspect 4-1, a specific example 2-1 for PDSCH reception related to paging / short messages and a specific example 2-2 for PDCCH reception related to paging / short messages are shown below.

[0116] <Example 2-1: PDSCH> In Example 1-1, operation a1 may be replaced with the following operation a1a: [Operation a1a] If a UE is activated with one TCI state and the active TCI state is associated with a PCI different from the PCI of the serving cell (non-serving cell PCI), the UE is required to receive the PDSCH scheduled by a DCI with a CRC scrambled by a P-RNTI only when the PDSCH is QCL'd with CORESET 0 without a TCI state indication.

[0117] <Example 2-2: PDCCH> In Example 1-2, operation b1 may be replaced with the following operation b1a: [Operation b1a] If a UE is activated with one TCI state and the active TCI state is associated with a PCI different from the PCI of its serving cell, it is required to monitor (receive) a PDCCH (DCI) with a CRC scrambled by a P-RNTI only if the PDCCH (DCI) is associated with CORESET 0 without a TCI state indication.

[0118] In operation b1a, "when a PDCCH (DCI) with CRC scrambled by a P-RNTI is associated with CORESET 0 without a TCI status indication" and "when a PDCCH (DCI) with CRC scrambled by a P-RNTI is monitored (received) in CORESET 0 without a TCI status indication" may be read interchangeably.

[0119] Fifth Embodiment This embodiment relates to a scheduling offset.

[0120] The first PDSCH may be a PDSCH (specific DL channel) scheduled by a DCI with a CRC scrambled by the P-RNTI, and the second PDSCH may be a PDSCH (DL signal, non-serving cell signal) with a TCI state associated with a PCI different from the PCI of the serving cell.

[0121] At least one specific PDSCH among the first PDSCH and the second PDSCH in a2 / a3 / b2 / b3 may have a scheduling offset equal to or greater than a threshold (the UE may assume that at least one specific PDSCH among the first PDSCH and the second PDSCH in a2 / a3 / b2 / b3 has a scheduling offset equal to or greater than a threshold). For example, the specific PDSCH may be the first PDSCH. The scheduling offset may be a time offset between reception of the DL DCI and the corresponding specific PDSCH (scheduled thereby). The threshold may be reported by the UE as UE capability information (e.g., timeDurationForQCL).

[0122] If the unified TCI state (default TCI state) applied when the scheduling offset of the first PDSCH is smaller than a threshold is different from the unified TCI state (default TCI state) applied when the scheduling offset of the second PDSCH is smaller than a threshold, the UE is not clear which default TCI state to apply to receiving a specific PDSCH. Therefore, the TCI state of a specific PDSCH becomes clear by having a scheduling offset greater than or equal to the threshold.

[0123] The unified TCI state (default TCI state) applied when the scheduling offset of the first PDSCH is smaller than a threshold may be the same as the unified TCI state (default TCI state) applied when the scheduling offset of the second PDSCH is smaller than a threshold.

[0124] <Other Embodiments> <UE Capability Information / Higher Layer Parameter> 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.

[0125] A UE configured with higher layer parameters corresponding to the function may perform the function. It may also be specified that "a UE not configured with higher layer parameters corresponding to the function shall not perform the function (for example, in accordance with Rel. 15 / 16)."

[0126] A UE that has reported / transmitted a UE capability indicating that it supports the feature may perform the feature. It may also be specified that "a UE that has not reported a UE capability indicating that it supports the feature shall not perform the feature (e.g., in accordance with Rel. 15 / 16)."

[0127] If the UE reports / transmits a UE capability indicating that it supports the function and the corresponding higher layer parameters are 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 higher layer parameters are not configured, the UE shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0128] Which embodiment / option / choice / function is used among the above multiple embodiments 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.

[0129] The UE capabilities may indicate whether the UE supports at least one of the following functions: L1 / L2 inter-cell mobility (or M-TRP inter-cell); Actions a1 / a2 / a3 / b1 / b2 / b3 / a1a / b1a.

[0130] The UE capability may indicate at least one of the following values: - The number of additional PCIs that the UE can configure (or the total number of PCIs including the serving cell PCI); - The number of additional PCIs that the UE can configure for measuring / reporting L1 beam reports (or the total number of PCIs including the serving cell PCI); - The number of active PCIs associated with active TCI states that the UE can be indicated for (e.g., the number of PCIs that can be supported); - The maximum number of active TCI states.

[0131] If the UE does not report UE capabilities indicating that it supports the above functions, the base station may cause the UE to receive system information / paging / short messages from the serving cell by switching the active TCI state, which may be from an active TCI state corresponding to a non-serving cell to an active TCI state corresponding to the serving cell. The base station may cause the UE to receive the system information / paging / short messages via dedicated RRC configuration / signaling of the non-serving cell.

[0132] A UE supporting the functionality of operation a2 / b2 may be able to receive system information / paging / short messages from the serving cell and PDCCH / PDSCH / CSI-RS from non-serving cells in different symbols.

[0133] When a UE supporting the functionality of operation a3 / b3 is instructed to receive system information / paging / short messages from a serving cell and PDCCH / PDSCH / CSI-RS from a non-serving cell in the same symbol, the UE may determine which signal to receive, the system information / paging / short message from the serving cell or the PDCCH / PDSCH / CSI-RS from the non-serving cell, and may receive the determined signal. The determination may be based on the priority of each signal. The priority of each signal may be configured / indicated or specified in a specification.

[0134] The above UE capabilities / higher layer parameters allow the UE to achieve the above functions while maintaining compatibility with existing specifications.

[0135] (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.

[0136] 4 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).

[0137] 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.

[0138] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0139] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0140] 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.

[0141] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0142] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0143] 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.

[0144] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0145] 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.

[0146] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0147] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0148] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0149] 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.

[0150] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0151] The PDSCH transmits user data, upper layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, upper layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0152] 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.

[0153] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0154] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0155] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0156] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0157] 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.

[0158] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0159] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0160] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0161] (Base Station) Fig. 5 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.

[0162] 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.

[0163] 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.

[0164] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0165] 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.

[0166] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0167] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0168] 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.

[0169] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0170] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0171] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0172] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0173] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] The transceiver 120 may transmit an indication of one or more active transmission configuration indication (TCI) states. The controller 110 may control transmission of a first downlink channel for at least one of paging, short messages, and system information based on the number of the one or more active TCI states and a physical cell ID (PCI) associated with one of the one or more active TCI states.

[0179] The transceiver unit 120 may transmit an indication of one or more active transmission configuration indication (TCI) states. The controller 110 may control transmission of a first downlink channel for at least one of paging and short messages and system information based on the number of the one or more active TCI states and a physical cell ID (PCI) associated with one of the one or more active TCI states. The first downlink channel may be in a control resource set with index 0.

[0180] (User Terminal) Fig. 6 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0181] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0182] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0183] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0184] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0185] 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.

[0186] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0187] 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.

[0188] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0189] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0190] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0191] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0192] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0193] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0194] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0195] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0196] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0197] The transceiver unit 220 may receive an indication of one or more active transmission configuration indication (TCI) states. The controller 210 may control reception of a first downlink channel for at least one of paging, short messages, and system information based on the number of the one or more active TCI states and a physical cell ID (PCI) associated with one of the one or more active TCI states.

[0198] If the number of the one or more active TCI states is one, the controller 210 may not be required to receive the first downlink channel.

[0199] When the number of the one or more active TCI states is greater than one and the one TCI state is associated with a second PCI different from the first PCI of the serving cell, the control unit 210 may control the second downlink channel with the one active TCI state and the first downlink channel to be received on different symbols.

[0200] When the number of the one or more active TCI states is greater than one, and the one TCI state is associated with a second PCI different from the first PCI of the serving cell, and the second downlink channel with the one active TCI state and the first downlink channel are transmitted on the same channel, the control unit 210 may control receiving the first downlink channel.

[0201] The transceiver unit 220 may receive an indication of one or more active transmission configuration indication (TCI) states. The controller 210 may control reception of a first downlink channel for at least one of paging and short messages and system information based on the number of the one or more active TCI states and a physical cell ID (PCI) associated with one of the one or more active TCI states. The first downlink channel may be in a control resource set with index 0.

[0202] If no TCI state is indicated for the control resource set, and the number of the one or more active TCI states is 1, and the one TCI state is associated with a second PCI different from the first PCI of the serving cell, the control unit 210 may control receiving the first downlink channel.

[0203] When a TCI state for the control resource set is indicated, and the number of the one or more active TCI states is 1, and the one TCI state is associated with a second PCI different from the first PCI of the serving cell, the control unit 210 may control not to receive the first downlink channel.

[0204] If a TCI state for the control resource set is not indicated, the one or more active TCI states may include a quasi co-location (QCL) assumption for the control resource set.

[0205] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0206] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0207] 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. 7 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.

[0208] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0209] 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.

[0210] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0211] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0212] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0213] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0214] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0215] 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.

[0216] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0217] 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.

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

[0219] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0220] 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.

[0221] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0222] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0223] 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.

[0224] 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.

[0225] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0226] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0231] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0232] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0233] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0234] 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.

[0235] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0236] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0237] 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."

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0245] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0246] 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).

[0247] 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).

[0248] 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.

[0249] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0250] 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).

[0251] 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.

[0252] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0253] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0254] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 8 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0260] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0261] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0262] 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.

[0263] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0264] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0265] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0266] 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.

[0267] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0268] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0269] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0270] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0271] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0272] 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.

[0273] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0274] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0275] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0276] 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."

[0277] 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.

[0278] 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.

[0279] 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.

[0280] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0281] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0282] 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.

[0283] 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."

[0284] 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.

[0285] 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."

[0286] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0287] 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.

[0288] 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.

[0289] This application is based on Japanese Patent Application No. 2022-031224, filed March 1, 2022, the contents of which are incorporated herein in their entirety.

Claims

1. a receiver for receiving an indication of one or more active transmission configuration indication (TCI) states; a control unit for controlling reception of a first downlink channel for at least one of paging, short messages, and system information in a control resource set with index 0; When a TCI state for the control resource set is indicated, and the number of the one or more active TCI states is 1, and the indicated one TCI state is associated with a second physical cell ID (PCI) different from a first PCI of a serving cell, the control unit controls the terminal not to receive the first downlink channel.

2. receiving an indication of one or more active transmission configuration indication (TCI) states; controlling reception of a first downlink channel for at least one of paging, short messages, and system information within a control resource set with index 0; and controlling not to receive the first downlink channel when a TCI state for the control resource set is indicated, the number of the one or more active TCI states is 1, and the indicated one TCI state is associated with a second physical cell ID (PCI) different from a first PCI of a serving cell.

3. a transmitter for transmitting one or more active transmission configuration indication (TCI) state indications; a control unit for controlling transmission of a first downlink channel for at least one of paging, short messages, and system information in a control resource set with index 0; A base station, wherein when a TCI state for the control resource set is indicated, and the number of the one or more active TCI states is 1, and the indicated one TCI state is associated with a second physical cell ID (PCI) different from a first PCI of a serving cell, the control unit controls not to transmit the first downlink channel.

4. A system including a terminal and a base station, The terminal a receiver for receiving an indication of one or more active transmission configuration indication (TCI) states; a control unit for controlling reception of a first downlink channel for at least one of paging, short messages, and system information in a control resource set with index 0; When a TCI state for the control resource set is indicated, and the number of the one or more active TCI states is 1, and the indicated one TCI state is associated with a second physical cell ID (PCI) different from a first PCI of a serving cell, the controller controls not to receive the first downlink channel; The base station A system comprising a transmitter for transmitting an indication of said one or more active TCI states.