Terminal, wireless communication method, base station and system

Abstract

A terminal according to an aspect of this disclosure includes: a control unit that when the number of physical cell IDs (PCIs) that become active among a PCI corresponding to a serving cell and a PCI corresponding to a non-serving cell is one, assumes that a transmission configuration indicator (TCI) state other than the transmission configuration indicator (TCI) state associated with the PCI that becomes active is not activated; and a reception unit that obtains system information on the basis of information transmitted from the cell with the PCI that becomes active.

Description

Technical Field

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

Background Art

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was standardized for the purpose of further high data rates, low latency, etc. (Non-Patent Document 1). Also, for the purpose of further large capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9), LTE-Advanced (3GPP Rel. 10-14) was standardized.

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

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a future wireless communication system (e.g., a wireless communication system after Rel. 16 / 5G), it is assumed that communication is controlled based on inter-cell mobility between a plurality of cells including a non-serving cell, or inter-cell mobility using a plurality of transmission / reception points (e.g., Multi-TRP (MTRP)).

[0006] However, when communicating using a plurality of cells, a problem arises as to how to control the reception of DL signals or the transmission of UL signals according to the number of physical cell IDs supported / activated by the UE.

[0007] The present disclosure has been made in view of such a point, and a terminal and a wireless communication method capable of appropriately performing communication even when communicating using a plurality of transmission points 、 base station and systems are provided as one of the objectives.

Means for Solving the Problems

[0008] A terminal according to an aspect of the present disclosure corresponds to a serving cell 1st physical cell ID (PCI) Transmission Configuration Indication (TCI) state corresponding to and , a cell different from the serving cell corresponding to Second PCI a receiving unit that receives information about the TCI state corresponding to the and,[[]] a control unit that controls to receive a first downlink (DL) signal when a first DL signal transmitted from the serving cell and a second DL signal transmitted from a cell different from the serving cell overlap in a time domain and the first DL signal is a short message; and has them.

Effects of the Invention

[0009] According to an aspect of the present disclosure, communication can be appropriately performed even when communicating using a plurality of transmission points.

Brief Description of the Drawings

[0010] [Figure 1]1A and 1B are diagrams illustrating an example of inter-cell mobility. [Figure 2] FIG. 2 is a diagram showing an example of an activated TCI state according to the first embodiment. [Figure 3] FIG. 3 is a diagram illustrating an example of DL signal reception control according to the second embodiment. [Figure 4] FIG. 4 is a diagram illustrating another example of DL signal reception control according to the second embodiment. [Figure 5] FIG. 5 is a diagram illustrating an example of UL signal transmission control according to the second embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of DL signal reception control according to the third embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example for explaining reception control of a PDCCH according to the fourth embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 12] FIG. 12 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (TCI, spatial relations, QCL) In NR, it is being considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in the UE of at least one of a signal and a channel (referred to as signal / channel) based on the transmission configuration indication state (TCI state).

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

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

[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 determined based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with an sQCL (spatial QCL).

[0016] A plurality of types (QCL types) of QCLs may be defined. For example, four QCL types A and B may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may also be referred to as QCL parameters) are listed below: QCL Type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread, QCL Type B (QCL-B): Doppler shift and Doppler spread, QCL Type C (QCL-C): Doppler shift and mean delay, · QCL Type D (QCL-D): Spatial reception parameters.

[0017] The assumption by a UE that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

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

[0020] In the present disclosure, the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, 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), a Remaining Minimum System Information (RMSI), an Other System Information (OSI), etc.

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

[0023] Note that the channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS), simply a target, etc., and the above-mentioned other signals may be called a reference RS, a source RS, simply a reference, etc.

[0024] The channel for which the TCI state or spatial relation is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0025] Also, the RS having a QCL relation with the channel may be, for example, at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a sounding reference signal (Sounding Reference Signal (SRS)), a CSI-RS for tracking (also called Tracking Reference Signal (TRS)), a reference signal for QCL detection (also called QRS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), and the like.

[0026] The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a physical broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may be called an SS / PBCH block.

[0027] The RS of QCL type X in the TCI state may mean an RS having a relation of QCL type X with a certain channel / signal (DMRS of the channel / signal), and this RS may also be called the QCL source of QCL type X in the TCI state.

[0028] (Inter-cell mobility) In NR, it is considered that one or more Transmission / Reception Points (TRPs) (Multi-TRPs (MTRPs)) perform DL transmission to a UE, and it is also 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] Figure 1B shows an example of a multi-TRP scenario (e.g., multi-TRP inter-cell mobility when using multi-TRP). In each cell, a plurality (e.g., two) of TRPs (or different CORESET pool indexes) may be configured for the UE. Here, the case where the UE receives channels / signals from TRP#1 and TRP2 is shown. Also, here, the case where TRP#1 corresponds to physical cell ID (PCI) #1 and TRP#2 corresponds to PCI #2 is shown.

[0033] The multi-TRPs (TRP#1, #2) are connected by ideal / non-ideal backhaul, and information, data, etc. may be exchanged. From each TRP of the multi-TRPs, the same or different code words (Code Word (CW)) and the same or different layers may be transmitted. As one form of multi-TRP transmission, as shown in Figure 1B, Non-Coherent Joint Transmission (NCJT) may be used. Here, the case where NCJT is performed between TPRs corresponding to different PCIs is shown. Note that the same serving cell configuration may be applied / set for TRP#1 and TRP#2.

[0034] The plurality of PDSCHs (multi-PDSCHs) for which NCJT is performed may be defined to partially or completely overlap in at least one of the time and frequency domains. That is, the first PDSCH from TRP#1 and the second PDSCH from TRP#2 may overlap in at least one of the time and frequency resources. The first PDSCH and the second PDSCH may be used for transmitting the same TB or different TBs.

[0035] These first PDSCH and second PDSCH may be assumed to be not quasi-co-located. The reception of multiple PDSCH may be interpreted as the simultaneous reception of PDSCH that is not of a certain QCL type (e.g., QCL type D).

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

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

[0038] It may be assumed that the UE transmits separate CSI reports (CSI reports) for each respective TRP for different TRPs. Such CSI feedback may be referred to as separate feedback, separate CSI feedback, etc. In the present disclosure, "separate" may be mutually interpreted as "independent".

[0039] Since Rel.17 NR, it is assumed that beam indication to TCI states associated with different PCIs is supported by MAC CE / DCI. Also, since Rel.18 NR, it is assumed that the change of the serving cell to cells with different PCIs is supported to be indicated by MAC CE / DCI.

[0040] (Serving cell / Non-serving cell) The number of physical cell IDs (e.g., supported / active PCI) supported / activated for a UE in communication may be determined based on the UE capability (e.g., 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, from 1 to 7. Also, the physical cell IDs supported / activated may be associated with the active TCI state.

[0041] <Option 1> When the number of supported / activated PCIs is 1, the UE may activate the TCI state associated with one PCI (e.g., either a serving cell or a non-serving cell). That is, when the number of supported PCIs is 1, the MAC CE can switch between a serving cell and a non-serving cell. When the number of supported TCI states is more than 1, 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 the TCI state related only to the serving cell. That is, when the number of supported PCIs is 1, L1 / L2 inter-cell mobility is not supported (for example, the MAC CE does not support switching between the serving cell and non-serving cells). When the number of supported TCI states is more than 1, 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 to the UE from non-serving cells is being considered. For example, it is being considered that system information is transmitted only from the serving cell (for example, the UE receives system information only from the serving cell). On the other hand, for other information (e.g., paging information / short message), it is being considered that it is transmitted from non-serving cells in addition to the serving cell, or only from the serving cell.

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

[0045] Assume that the UE supports / activates only one cell / PCI (e.g., the PCI corresponding to either the serving cell or non-serving cell), or the UE supports only one active TCI state. In such a case, the problem is how to control the UE operation to properly receive system information.

[0046] In particular, when considering the case where only PCIs other than the PCI of the serving cell (or TCI states corresponding to PCIs other than the PCI of the serving cell) are activated (e.g., Option 2 above), how the UE acquires system information becomes an issue. For example, if transmission of paging / short messages from non-serving cells is allowed / supported, how the UE receives system information after receiving paging / short messages from non-serving cells becomes an issue.

[0047] Furthermore, when a UE supports / activates multiple cells / PCIs (e.g., PCIs corresponding to either a serving cell or a non-serving cell), a DL signal (or an UL signal) corresponding to a certain cell / PCI may overlap with a DL signal (or an UL signal) corresponding to another cell / PCI in the time domain. In such a case, if the active TCI states corresponding to each cell / PCI are different, how to control reception of DL signals (or transmission of UL signals) corresponding to other cells / PCIs becomes an issue.

[0048] The present inventors have studied the UE operation when one of the PCIs corresponding to the serving cell and the PCIs corresponding to the non-serving cells is active, and have come up with an idea for one aspect of the present embodiment.

[0049] Furthermore, the inventors have noted that when a first PCI corresponding to a serving cell and a second PCI corresponding to a non-serving cell are active, DL signals / UL signals corresponding to the respective cells may overlap in the time domain, and have studied the UE operation in such a case, resulting in the idea of another aspect of the present embodiment.

[0050] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that each of the following aspects (for example, each case) may be used alone, or at least two of them may be combined and applied.

[0051] 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."

[0052] In the present disclosure, terms such as activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0053] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), configurations, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0054] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof.

[0055] 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.

[0056] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0057] In this disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0058] In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmission 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 (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 each other.

[0059] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interchangeable. "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 TCI may be interchangeable with each other.

[0060] In the following embodiments, "multiple" and "two" may be interchangeable. Also, "TAG" and "TAG ID" may be interchangeable. Also, "cell", "CC", and "carrier" may be interchangeable.

[0061] The following description may be applied to inter-cell mobility (for example, L1 / L2 inter cell mobility), or may be applied to communication control other than inter-cell mobility.

[0062] The number of active PCIs being one may also mean that in inter-cell mobility, the number of active PCIs between the serving cell and the non-serving cell is one (or either the PCI corresponding to the serving cell or the PCI corresponding to the non-serving cell is active).

[0063] (Wireless communication method) First Embodiment In the first embodiment, an example of UE operation based on the number of physical cell IDs (for example, PCIs) that become active or the number of PCIs that become active will be described.

[0064] The PCI to be activated may be a PCI associated with a TCI state to be activated for a DL signal / DL channel. The DL signal / DL channel may be, for example, a PDCCH / PDSCH. In the present disclosure, the PCI may be replaced with a TRP index, a cell index, an additional index, or a predetermined index.

[0065] The UE may notify the network (e.g., base station) of the number of PCIs that it supports (e.g., PCIs that can be simultaneously activated) as UE capability information. Alternatively, the network may configure / notify the UE of the number of PCIs to be activated using higher layer signaling.

[0066] [Option 1-1A] When the number of PCIs to be activated is one, it may mean that the PCI corresponding to a specific cell is activated. The specific cell may be, for example, a serving cell (see FIG. 2). The UE may not assume that TCI states other than the TCI state associated with the serving cell (or the PCI of the serving cell) are activated.

[0067] That is, when the number of active PCIs is one, the UE may assume that only the TCI state associated with the serving cell (or the PCI of the serving cell) is activated. The UE may receive system information transmitted from the serving cell based on the active TCI state associated with the serving cell (or the PCI of the serving cell). This allows the UE to properly receive system information even when the system information is transmitted only from the serving cell.

[0068] Furthermore, even if transmission of paging / short messages from non-serving cells is supported / allowed, by configuring the system so that only the TCI state related to the PCI of the serving cell is activated, it is possible to prevent cases where system information cannot be received properly.

[0069] [Option 1-1B] Alternatively, the specific cell may be a non-serving cell. For example, if the number of PCIs to be activated is one, a TCI state associated with one PCI (e.g., the PCI of the non-serving cell) different from the PCI of the serving cell may be activated.

[0070] In the case of Option 1-1B, the UE may acquire system information based on information transmitted from a non-serving cell. For example, the base station may transmit to the UE system information commonly notified to all UEs or information equivalent to the system information, including the UE-specific information transmitted from the non-serving cell.

[0071] For example, the system information may be notified to the UE using RRC re-configuration signaling (e.g., RRC re-configuration signaling) that transmits the same information element (IE) as the system information transmitted using a downlink shared channel (e.g., PDSCH) of a non-serving cell.

[0072] For a UE in an RRC connected state (e.g., RRC_CONNECTED), the network can notify the UE of system information by dedicated signaling using an RRCI reconfiguration message. Such system information notification may be performed, for example, when an active BWP that does not have a common search space configured to monitor system information or paging (or at the request of the UE) is configured for the UE (Condition 1-1).

[0073] In this way, system information may be notified to a UE having an active TCI state associated with a PCI different from that of the serving cell using an RRC dedicated to UEs of a non-serving cell.

[0074] This makes it possible to receive system information after a paging / short message even if transmission of the paging / short message from a non-serving cell is supported / allowed.

[0075] Alternatively, the following condition may be added in addition to condition 1-1 (or instead of condition 1-1). Condition 1-2: When an active BWP having a common search space configured for the UE to monitor system information and paging is configured for the UE However, while the TCI state of the common search space is associated with the serving cell, the activated unified TCI state is associated with an additional PCI (for example, the PCI corresponding to a non-serving cell). Or, even when the TCI state of the common search space is associated with a PCI different from the activated unified TCI state, it may be the case.

[0076] [Option 1-2] It may be controlled such that the number of active PCIs is at least two or more. That is, each UE may perform UE reporting such that the number of active PCIs is two or more, or the base station may configure / notify the UE of two or more as the number of active PCIs.

[0077] [Option 1-3] When the base station transmits system information / paging / short message from the serving cell and the TCI state associated only with the PCI of the non-serving cell is activated in the UE, the base station may control to update the activated TCI state of the UE such that the TCI state associated with the PCI of the serving cell is activated. For example, the base station may control to update the active TCI state (for example, the active TCI state corresponding to the PCI of the non-serving cell) configured for the UE to the TCI state associated with the PCI of the serving cell by using MAC CE / DCI.

[0078] The UE may update the active TCI state to the TCI state corresponding to the serving cell based on the information transmitted from the base station (or update the PCI to be activated to the PCI of the serving cell), and then receive the system information transmitted from the serving cell based on the updated TCI state. This makes it possible to properly receive the system information even when the system information is transmitted only from the serving cell.

[0079] <Second embodiment> In the second embodiment, a case will be described in which the number of physical cell IDs (for example, PCIs) that become active is two or more.

[0080] In the following description, a case where a first PCI corresponding to a serving cell and a second PCI corresponding to a non-serving cell are activated will be described as an example, but the present invention is not limited to this. Two or more PCIs correspond to a certain cell (e.g., a serving cell), and the active TCI state is set separately for each PCI (e.g., a different TCI state is activated for each PCI).

[0081] Furthermore, the following description may be suitably applied to a case where the UE does not have the capability to simultaneously receive two QCLs (e.g., QCL type D). A case where the UE does not have the capability to simultaneously receive two QCLs (e.g., QCL type D) may be, for example, a case where a first DL signal corresponding to a first active TCI state and a second DL signal corresponding to a second active TCI state overlap in the same time domain (e.g., symbol), or a case where the UE does not support reception of the first DL signal using the first active TCI state and reception of the second DL signal using the second active TCI state.

[0082] Alternatively, the following description may be suitably applied to a case where the UE does not have the ability to transmit simultaneously using different beams.

[0083] Different TCI states associated with different PCIs may be included in different code points in the TCI state notification field included in the DCI. For example, at least one of the multiple code points specifiable in the TCI state general field may correspond to a TCI state associated with a first PCI, and at least another may correspond to a TCI state associated with a second PCI.

[0084] When the first PCI corresponding to the serving cell and the second PCI corresponding to the non-serving cell are active, the UE may control reception of the DL signal transmitted from each cell based on at least one of the following options 2-1A to 2-2A. The DL signal may be read as the DL channel.

[0085] [Option 2-1A] The first DL signal #A transmitted from the serving cell and the second DL signal #B transmitted from the non-serving cell may be controlled not to be transmitted in the same time region (e.g., the same symbol). The UE may be controlled not to expect, not be required to receive, or not to monitor the first DL signal #A and the second DL signal #B in the same time region.

[0086] The first DL signal #A may be system information (or a PDSCH containing system information).

[0087] [Option 2-2A] When a first DL signal #A transmitted from a serving cell and a second DL signal #B transmitted from a non-serving cell collide / overlap in the same time domain (e.g., the same symbol) (see FIG. 3), the receiving process may be controlled based on a predetermined rule / predetermined criterion.

[0088] 3 shows an example in which a first DL signal #A transmitted from a serving cell and a second DL signal #B transmitted from a non-serving cell collide / overlap in the same time domain (e.g., the same symbol). The TCI state corresponding to the first DL signal #A is associated with the PCI of the serving cell, and the TCI state corresponding to the second DL signal #B is associated with a PCI different from the PCI of the serving cell (here, the PCI / additional PCI of the non-serving cell). In other words, the first DL signal #A and the second DL signal #B are associated with TCI states related to different PCIs.

[0089] The predetermined rule / predetermined criterion may be a priority set between the first DL signal #A and the second DL signal #2. The UE may give priority to receiving a DL signal corresponding to any one of the cells (or PCIs).

[0090] For example, the UE may prioritize reception of the first DL signal #A, and may control the UE not to receive (or drop / skip / cancel reception / monitoring) the second DL signal #B, which has a lower priority.

[0091] Alternatively, the UE may receive the second DL signal #B, which has a lower priority, based on the QCL type D assumption corresponding to the first DL signal #A (or the TCI state used to receive the first DL signal #A).

[0092] Here, the case where the second UL signal #B is given priority has been shown, but the present invention is not limited to this, and the first UL signal #A may be given priority.

[0093] Alternatively, whether the first DL signal #A or the second DL signal #2 is to be prioritized may be determined based on the content of the DL signal. The priority based on the content of the DL signal may be predefined in the specifications or may be set to the UE by the base station using higher layer signaling or the like.

[0094] The first DL signal #A / second DL signal #B may be at least one of a CORESET, a search space, a DCI, a PDCCH, a PDSCH, a CSI-RS, a TRS, and an SSB.

[0095] Furthermore, the first DL signal #A may be system information (or a PDSCH including system information) (see FIG. 4). Alternatively, the first DL signal #A may be a CORESET used to transmit system information. Alternatively, the first DL signal #A may be a paging / short message. Alternatively, the first DL signal #A may be a common search space of a predetermined type (e.g., a common search space of type 0 / 0A / 1 / 2 / 3). Alternatively, the first DL signal #A may be a UE-specific search space. Alternatively, the first DL signal #A may be a PDSCH scheduled by a common search space of a predetermined type (e.g., a common search space of type 0 / 0A / 1 / 2 / 3).

[0096] The above Option 2-1A / Option 2-2A may be applied to multiple frequency ranges, or may be applied only to a specific frequency range. The multiple frequency ranges may include, for example, at least a first frequency range (e.g., FR1) and a second frequency range (e.g., FR2) that is higher than the first frequency range. The specific frequency range may be the second frequency range (e.g., FR2). If applied only to a specific frequency range, it may be applied only when the QCL assumptions / TCI conditions of the first DL signal #A and the second DL signal #B are not the same (e.g., when the QCL type D is not the same).

[0097] When the first PCI corresponding to the serving cell and the second PCI corresponding to the non-serving cell are active, the UE may control the transmission of the UL signal based on at least one of the following options 2-1B to 2-2B for the UL signal transmitted to each cell. The UL signal may be read as the UL channel.

[0098] [Option 2-1B] The first UL signal #A for which transmission to the serving cell is scheduled and the second UL signal #B for which transmission to a non-serving cell is scheduled may be controlled so as not to overlap in the same time domain (e.g., the same symbol). The schedule may be set / activated and rewritten. The UE may be controlled not to transmit (or schedule) the first UL signal #A and the second UL signal #B in the same time domain, not to be required to transmit in the same time domain, or not to transmit in the same time domain, assuming that they are not transmitted in the same time domain.

[0099] [Option 2-2B] When the first UL signal #A for which transmission to the serving cell is scheduled and the second UL signal #B for which transmission to a non-serving cell is scheduled collide / overlap in the same time domain (e.g., the same symbol) (see FIG. 5), the transmission process may be controlled based on a predetermined rule / predetermined criterion.

[0100] FIG. 5 shows an example in which the first UL signal #A for which transmission to the serving cell is scheduled and the second UL signal #B for which transmission to a non-serving cell is scheduled collide / overlap in the same time domain (e.g., the same symbol). The TCI state corresponding to the first UL signal #A is associated with the PCI of the serving cell, and the TCI state corresponding to the second UL signal #B is associated with a PCI different from the PCI of the serving cell (here, the PCI of the non-serving cell / additional PCI). That is, the first UL signal #A and the second UL signal #B are each associated with a TCI state related to a different PCI. Note that the TCI state may be rewritten as a spatial relationship / UL TCI / joint TCI / SRI.

[0101] The predetermined rule / predetermined criterion may be the priority set between the first UL signal #A and the second UL signal #2. The UE may preferentially transmit the UL signal corresponding to any cell (or PCI).

[0102] For example, the UE may prioritize the transmission of the second UL signal #B. For the first UL signal #A with a lower priority, the UE may be controlled not to transmit it (or to drop / skip / cancel the transmission).

[0103] Alternatively, the UE may perform the transmission of the first DL signal #A with a lower priority based on the TCI state (or spatial relationship / UL TCI / joint TCI / SRI) used for the transmission of the second UL signal #B.

[0104] Here, the case of prioritizing the second UL signal #B is shown, but it is not limited thereto, and the first UL signal #A may be prioritized.

[0105] Alternatively, regarding which of the first UL signal #A and the second UL signal #2 is prioritized, it may be determined based on the content of the UL signal. The priority based on the content of the UL signal may be defined in advance in the specification, or may be set from the base station to the UE using upper layer signaling or the like.

[0106] The first UL signal #A / second UL signal #B may be at least one of UCI (HARQ-ACK / CSI / SR), PUSCH, PUCCH, SRS, and PRACH.

[0107] The above Option 2-1B / Option 2-2B may be applied to a plurality of frequency ranges, or may be applied only to a specific frequency range. The plurality of frequency ranges may include, for example, at least a first frequency range (e.g., FR1) and a second frequency range (e.g., FR2) having a higher frequency than the first frequency range. The specific frequency range may be the second frequency range (e.g., FR2). When it is applied only to a specific frequency range, it may be applied only when the spatial relationship / TCI state of the first UL signal #A and the second UL signal #B is not the same (e.g., when the QCL type D is not the same).

[0108] <The Third Embodiment> In the third embodiment, an example of UE operation when the number of active physical cell IDs (e.g., PCIs) is one and a TCI state associated with a PCI (e.g., an additional PCI) different from the PCI of the serving cell is activated is described.

[0109] If the number of PCIs that are active is one and a TCI state associated with an additional PCI is activated, the UE may apply at least one of the following options 3-1 to 3-4.

[0110] [Option 3-1] The UE may monitor / receive (or may be requested to monitor / receive) a predetermined DL signal. The predetermined DL signal may be at least one (or all) of "system information," "CORESET for system information," "paging / short message," "common search space of a predetermined type," "UE-specific search space," "PDSCH including system information," and "PDSCH scheduled in common search space of a predetermined type." The common search space of a predetermined type may be, for example, a common search space of type 0 / 0A / 1 / 2 / 3.

[0111] [Option 3-2] The UE may monitor / receive (or may be required to monitor / receive) at least one (or all) of the given DL signals if the QCL assumption for that DL signal is the same as the active TCI state, which means that the UE can receive the given DL signal from a non-serving cell.

[0112] [Option 3-3] The UE may not monitor / receive (or may not be required to monitor / receive) at least one (or all) of the predetermined DL signals. For example, if monitoring / receiving a predetermined DL signal exceeds the UE's capabilities, option 3-3 may be applied.

[0113] For example, Option 3-1 to Option 3-2 are applicable when the UE reports its UE capabilities. Otherwise, Option 3-3 may be applicable.

[0114] [Option 3-4] The UE may switch the QCL assumption / TCI state based on the elapse of a certain time / predetermined period (e.g., certain time duration). The certain time / predetermined period may be the time for receiving at least one (or all) of the predetermined DL signals. The predetermined DL signal may be a DL signal transmitted from the serving cell (the first DL signal #A in FIG. 6). The UE may monitor / receive at least one (or all) of the predetermined DL signals in a symbol every predetermined period (or may be required to monitor / receive).

[0115] The UE may control the monitoring / reception of the predetermined DL signal based on the TCI state corresponding to the signal from the serving cell during the predetermined period. That is, when the PCI corresponding to the non-serving cell becomes active, the UE is controlled to monitor the DL signal based on the TCI associated with the PCI corresponding to the serving cell during the predetermined period. On the other hand, the UE may control the monitoring / reception of the DL signal based on the TCI state (e.g., the indicated TCI state) corresponding to the non-serving cell during other periods.

[0116] Also, a gap may be provided before and after a certain time (or the monitoring period of the first DL signal #A). The gap may be called a beam switching gap. The UE may use the gap to switch the TCI states associated with different PCIs. The UE may be controlled not to transmit / receive any signal (or not be required to transmit / receive) during the beam switching period (or the gap). Such UE operation may be supported / applied only when the UE reports its capabilities.

[0117] [Variation] The third embodiment is preferably applied to a case where the number of active PCIs is one and a TCI state associated with an additional PCI is activated, but the application case is not limited to this. For example, the third embodiment may also be applied to a case where a UE activates multiple TCI states associated with the PCI of the serving cell and the additional PCI (e.g., a PCI different from the serving cell) and a predetermined DL signal from the serving cell overlaps with another DL signal from a non-serving cell (e.g., the second embodiment).

[0118] <Fourth embodiment> In the fourth embodiment, a description will be given of reception / transmission operations when the number of active physical cell IDs (e.g., PCIs) is two or more and a signal corresponding to a first PCI and a signal corresponding to a second PCI overlap in the time domain. Note that the fourth embodiment may be applied in combination with the contents (part / all) of the second embodiment as appropriate.

[0119] In the following description, a first signal #A corresponding to a first PCI of a serving cell and a second signal #B corresponding to a second PCI of a non-serving cell will be taken as an example, but the present invention is not limited to this.

[0120] Whatever the content of the first signal #A and the second signal #B, if the first signal #A and the second signal #B are received (or scheduled) in the same symbol and have different QCL types D, it is desirable to define a priority between the first signal #A and the second signal #B.

[0121] The first signal #A / second signal #B may be PDCCH / PDSCH / SSB / CSI-RS / TRS in DL, and may be PUCCH / PUSCH / SRS in UL.

[0122] For the UL, QCL Type D terminology may be used for unified TCI and spatial relation terminology may be used for Rel. 15 / 16 TCI states.

[0123] As a priority rule for the QCL type D assumption between the first signal #A corresponding to the TCI state associated with the serving cell and the second signal B# corresponding to the TCI state associated with the non-serving cell, at least one of the following Option 4-1 and Option 4-2 may be applied.

[0124] [Option 4-1] In the same time domain (e.g., the same symbol), the serving cell may be prioritized over the non-serving cell.

[0125] For example, assume that the first DL signal #A transmitted from the serving cell and the second DL signal #B transmitted from the non-serving cell collide / overlap in the same time domain (e.g., the same symbol) (see Figure 3). Here, the TCI state corresponding to the first DL signal #A is associated with the PCI of the serving cell, and the TCI state corresponding to the second DL signal #B is associated with a PCI different from the PCI of the serving cell (here, the PCI of the non-serving cell / additional PCI). That is, the first DL signal #A and the second DL signal #B are associated with TCI states related to different PCIs.

[0126] In such a case, the UE preferentially receives the first DL signal #A. For example, the UE may be controlled to receive the first DL signal #A and not receive (e.g., drop / cancel) the second DL signal #B. Alternatively, the UE may be controlled to receive the first DL signal #A and the second DL signal #B based on the TCI state corresponding to the first PCI of the serving cell.

[0127] Note that, here, the case where the serving cell is given priority over the non-serving cell is shown, but it is not limited to this. For example, the non-serving cell may be controlled to be given priority over the serving cell. Which cell to give priority to may be defined in advance in the specification, or may be set from the base station to the UE using upper layer signaling or the like.

[0128] [Option 4-2] In a certain time domain (for example, the same symbol), when QCL type D collides between the same DL signals (for example, the same channel / RS) or when the same DL signals corresponding to different QCL type Ds collide, the serving cell may be given priority over the non-serving cell. On the other hand, in a certain time domain (for example, the same symbol), when QCL type D collides between different DL signals (for example, different channels / RS) or when different DL signals corresponding to different QCL type Ds collide, the priority may be determined based on other rules.

[0129] Alternatively, in a certain time domain (for example, the same symbol), when QCL type D collides between different DL signals (for example, different channels / RS) or when different DL signals corresponding to different QCL type Ds collide, the serving cell may be given priority over the non-serving cell. On the other hand, in a certain time domain (for example, the same symbol), when QCL type D collides between the same DL signals (for example, the same channel / RS) or when the same DL signals corresponding to different QCL type Ds collide, the priority may be determined based on other rules.

[0130] The other rules may be, for example, the rules defined in an existing system (for example, Rel.15 / 16). For example, the PDCCH may be given priority over the PDSCH. Also, the CSI-RS / SSB for L1-RSRP measurement / BFD / RLM may be given priority over the PDSCH.

[0131] 《Priority between PDCCHs》 For example, assume that a first PDCCH #A transmitted from a serving cell and a second PDCCH #B transmitted from a non-serving cell collide / overlap in the same time domain (e.g., the same symbol) (see Figure 7).

[0132] As a priority rule for the QCO type (e.g., QCL type D) assumption between the PDCCH corresponding to the TCI state associated with the serving cell and the PDCCH corresponding to the TCI state associated with the non-serving cell, the rules defined in the existing system (e.g., Rel.15 / 16) may be applied.

[0133] In Rel.16, when the PDCCH monitoring occasions overlap, the UE cannot monitor PDCCHs with different QCL types D. For a plurality of CORESETs in overlapping monitoring occasions corresponding to different QCL types D respectively, the UE is controlled to monitor / receive only the CORESET having the same QCL type D as the CORESET determined according to a predetermined priority rule / priority order.

[0134] The predetermined priority rule / priority order gives priority to the common search space set over the UE-specific search space set (common search space set > UE-specific search space set), gives priority to the one with a smaller cell index when the search space set types are the same (lower cell index > higher cell index), and gives priority to the one with a smaller search space set index when the cell indexes are the same (lower search space set index > higher search space set index).

[0135] That is, the UE may determine which of the first PDCCH (or, CORESET) #A and the second PDCCH (or, CORESET) #B that overlap in the time domain to prioritize, considering the priority in the order of search space type > serving cell index > search space set ID.

[0136] Alternatively, at least one of the following options 5-1 to 5-4 may be applied as a priority rule assuming a QCO type (e.g., QCO type D) between a PDCCH corresponding to a TCI state associated with a serving cell and a PDCCH corresponding to a TCI state associated with a non-serving cell.

[0137] [Option 5-1] Priority may be considered in the order of PCI > search space type > cell index > search space set ID.

[0138] [Option 5-2] Priority may be considered in the order of search space type > PCI > cell index > search space set ID.

[0139] [Option 5-3] Priority may be considered in the order of search space type > cell index > PCI > search space set ID.

[0140] [Option 5-4] Priority may be considered in the order of search space type > cell index > search space set ID > PCI.

[0141] Although options 5-1 to 5-4 show cases where PCI, search space type, cell index, and search space set ID are used as parameters that are the basis of priority, the present invention is not limited to this. Some of these may not be taken into consideration, or other parameters may be taken into consideration. Examples of other parameters may include the start symbol of the DL signal, the priority set for the DL signal (PDCCH), etc.

[0142] When considering PCI, the PCI of the serving cell may be determined to have a higher priority than a PCI different from the serving cell (e.g., the PCI of a non-serving cell) (priority condition A). Alternatively, a PCI different from the serving cell (e.g., the PCI of a non-serving cell) may be determined to have a higher priority than the PCI of the serving cell (priority condition B). Which of priority condition A and priority condition B is applied to PCI may be defined in advance in the specification, or may be set from the base station to the UE using upper layer signaling or the like.

[0143] When considering the search space type, the common search space may be determined to have a higher priority than the UE-specific search space. Note that this is not limited thereto, and the priority may be applied conversely.

[0144] When considering the cell index, a cell index with a lower index may be determined to have a higher priority than a cell index with a higher index. Note that this is not limited thereto, and the priority may be applied conversely.

[0145] When considering the search space set ID, a search space set ID with a lower ID may be determined to have a higher priority than a search space set ID with a higher ID. Note that this is not limited thereto, and the priority may be applied conversely.

[0146] When the first UL signal #A corresponding to the first PCI of the serving cell and the second UL signal #B corresponding to the second PCI of the non-serving cell overlap in the time domain, a priority rule similar to the above-described priority rules (option 4-1 to option 4-2 / option 5-1 to option 5-4) may be applied to UL transmission.

[0147] Alternatively, instead of applying a priority rule to UL transmissions, control may be performed to prevent both the first UL signal #A and the second UL signal #B from being scheduled / configured in the same time region. The UE may not expect the first UL signal #A and the second UL signal #B to be scheduled / configured in the same time region (e.g., the same symbol). For example, if a first UL signal #A that is periodically / semi-persistently configured / scheduled exists in a certain symbol, the UE may not expect the second signal #B (e.g., a dynamically scheduled second signal #B) to be scheduled in the same symbol.

[0148] The UL transmission control may be applied regardless of whether the QCL type D or spatial relationship of the first UL signal #A and the second UL signal #B is the same or different, or alternatively, the UL transmission control may be applied when the QCL type D or spatial relationship of the first UL signal #A and the second UL signal #B is different.

[0149] In addition, the first UL signal #A may be a PUSCH of a dynamic grant, a PUSCH of a configuration grant, a PUCCH, or a periodic / semi-persistent / aperiodic SRS, the corresponding joint TCI / ULTCI or spatial relationship of which is associated with the PCI of the serving cell.

[0150] The second UL signal #B may be a PUSCH of a dynamic grant, a PUSCH of a configured grant, a PUCCH, or a periodic / semi-persistent / aperiodic SRS, the corresponding joint TCI / ULTCI or spatial relationship of which is associated with a PCI different from the PCI of the serving cell.

[0151] Note that the priority (or priority rule) regarding the QCL assumption between the PCI of the serving cell and the PCI of the non-serving cell may be applied only to the reception of DL signals and may not be applied to the transmission of UL signals. This is because in UL transmission, it is possible to activate only the TCI state corresponding to one cell for the joint DL / UL TCI state or the UL TCI state for all UL channels / RSs.

[0152] (UE capability information) In the above first to fourth embodiments, the following UE capabilities may be set. Note that the following UE capabilities may be read as parameters (e.g., upper layer parameters) set from the network (e.g., base station) to the UE.

[0153] The operations of each embodiment may be applied only when the corresponding UE capabilities are reported.

[0154] UE capability information regarding whether to support L1 / L2 inter-cell mobility (or M-TRP inter-cell) may be defined.

[0155] UE capability information regarding the additional number of PCIs that the UE can set (or the total number of PCIs including the serving cell PCI) may be defined.

[0156] UE capability information regarding the additional number of PCIs that the UE can set (or the total number of PCIs including the serving cell PCI) for measuring / reporting L1 beam reports may be defined.

[0157] UE capability information regarding the number of active PCIs associated with the active TCI state that the UE can be instructed (e.g., the number of supported PCIs) may be defined.

[0158] The above-described first to fourth embodiments may be configured to be applied to a UE that supports / reports at least one of the above-described UE capabilities. Alternatively, the above embodiments may be configured to be applied to a UE set by the network.

[0159] (Wireless communication system) Hereinafter, the configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0160] FIG. 8 is a diagram showing 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) standardized by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0161] Further, the wireless communication system 1 may support dual connectivity (multi-RAT dual connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). 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)), and the like.

[0162] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0163] The wireless communication system 1 may support dual connectivity between a plurality of base stations within the same RAT (for example, dual connectivity where both the MN and the SN are base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0164] The wireless communication system 1 may include a base station 11 that forms a relatively wide-coverage macro cell C1, and a base station 12 (12a - 12c) that is disposed within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and the user terminal 20 are not limited to the modes shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0165] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) and dual connectivity (DC) using a plurality of component carriers (CCs).

[0166] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.

[0167] 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.

[0168] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0169] 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.

[0170] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0171] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0172] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0173] 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.

[0174] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0175] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0176] 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.

[0177] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0178] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0179] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0180] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0181] 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.

[0182] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may be transmitted.

[0183] The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, an SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0184] Also, in the wireless communication system 1, as the uplink reference signal (Uplink Reference Signal (UL-RS)), a sounding reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may be transmitted. Note that DMRS may also be called a UE-specific reference signal.

[0185] (Base station) 9 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.

[0186] 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.

[0187] 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.

[0188] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0189] 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.

[0190] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0191] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0192] 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.

[0193] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0194] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0195] The transmission / reception unit 120 (transmission processing unit 1211) may perform transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0196] The transmission / reception unit 120 (RF unit 122) may perform modulation to the radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the signal in the radio frequency band via the transmission / reception antenna 130.

[0197] On the other hand, the transmission / reception unit 120 (RF unit 122) may perform amplification, filtering, demodulation to the baseband signal, etc. on the signal in the radio frequency band received by the transmission / reception antenna 130.

[0198] The transmission / reception unit 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, etc. on the acquired baseband signal, and acquire user data, etc.

[0199] The transmission / reception unit 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)), reception 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.

[0200] The transmission path interface 140 may transmit and receive signals (backhaul signaling) with 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.

[0201] Note that the transmission unit and reception unit of the base station 10 in the present disclosure may be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0202] The transmission / reception unit 120 may notify system information using the information transmitted from the cell of the active PCI. When the number of active PCIs is one among the physical cell IDs (PCIs) corresponding to the serving cell and the PCIs corresponding to the non-serving cells, the control unit 110 may control not to activate those other than the transmission configuration indicator (TCI) state associated with the active PCI.

[0203] When a first physical cell ID (PCI) corresponding to the serving cell and a second PCI corresponding to a non-serving cell are active, the transceiver 120 may transmit information on the TCI state corresponding to each PCI. The control unit 110 may control the DL signals transmitted from each cell to prevent overlapping in the time domain based on the information on the TCI state corresponding to each PCI, or may determine the DL signals to be received by the terminal based on a predetermined rule when the DL signals transmitted from each cell overlap in the time domain.

[0204] (user terminal) 10 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0205] In this example, 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.

[0206] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0207] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0208] 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 composed of 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 the common understanding in the technical field related to the present disclosure.

[0209] The transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiver unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0210] The transceiver antenna 230 may be composed of an antenna described based on the common understanding in the technical field related to the present disclosure, such as an array antenna.

[0211] The transceiver unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0212] The transceiver unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0213] The transceiver unit 220 (transmission processing unit 2211) may perform processing of the PDCP layer, processing of the RLC layer (e.g., RLC retransmission control), processing of the MAC layer (e.g., HARQ retransmission control), etc. on, for example, data and control information obtained from the control unit 210, and generate a bit sequence to be transmitted.

[0214] The transmission / reception unit 220 (transmission processing unit 2211) may perform transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0215] Note that whether to apply DFT processing may be based on the setting of transform precoding. For a certain channel (for example, PUSCH), when transform precoding is enabled, the transmission / reception unit 220 (transmission processing unit 2211) may perform DFT processing as the above-mentioned transmission processing to transmit the channel using the DFT-s-OFDM waveform, and if not, it may not perform DFT processing as the above-mentioned transmission processing.

[0216] The transmission / reception unit 220 (RF unit 222) may perform modulation to the radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the signal in the radio frequency band via the transmission / reception antenna 230.

[0217] On the other hand, the transmission / reception unit 220 (RF unit 222) may perform amplification, filtering, demodulation to the baseband signal, etc. on the signal in the radio frequency band received by the transmission / reception antenna 230.

[0218] The transmission / reception 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, etc. to the acquired baseband signal, and acquire user data, etc.

[0219] The transmission / reception unit 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.

[0220] Note that the transmission unit and reception unit of the user terminal 20 in the present disclosure may be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0221] The transmission / reception unit 220 may acquire (or receive) system information based on information transmitted from the cell of the active PCI. When the PCI corresponding to the non-serving cell becomes active, the transmission / reception unit 220 may acquire system information based on UE-specific RRC signaling included in the downlink shared channel transmitted from the non-serving cell. The transmission / reception unit 220 may receive information for updating the TCI state to be activated to the TCI state associated with the PCI corresponding to the serving cell. When the number of active PCIs among the physical cell ID (PCI) corresponding to the serving cell and the PCI corresponding to the non-serving cell is one, the control unit 210 may assume that those other than the TCI state associated with the active PCI are not activated. When the number of active PCIs among the PCI corresponding to the serving cell and the PCI corresponding to the non-serving cell is one, the control unit 210 may assume that the PCI corresponding to the serving cell is always active. When the PCI corresponding to the non-serving cell becomes active, the control unit 210 may control to monitor the DL signal based on the TCI associated with the PCI corresponding to the serving cell for a certain period.

[0222] When the first physical cell ID (PCI) corresponding to the serving cell and the second PCI corresponding to the non-serving cell become active, the transmission / reception unit 220 may receive information regarding the TCI state corresponding to each PCI. Based on the information regarding the TCI state corresponding to each PCI, the control unit 210 controls the reception of the DL signal transmitted from each cell assuming that the DL signals transmitted from each cell do not overlap in the time domain, or may control the reception of the DL signal based on a predetermined rule when the DL signals transmitted from each cell overlap in the time domain.

[0223] When the first DL signal transmitted from the serving cell and the second DL signal transmitted from the non-serving cell overlap in the time domain, the predetermined rule may be the priority set between the first DL signal and the second DL signal. When the first DL signal is system information, the predetermined rule may be a rule in which the first DL signal has priority over the second DL signal. When the first downlink control channel transmitted from the serving cell and the second downlink control channel transmitted from the non-serving cell overlap in the time domain, the predetermined rule may be the priority order set between at least two of the cell type, search space type, cell index, and search space ID.

[0224] (Hardware Configuration) Note that the block diagrams used in the description of the above embodiment show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (for example, using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0225] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0226] 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. 11 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.

[0227] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0228] 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.

[0229] Each function in the base station 10 and the user terminal 20 is realized, for example, by causing a processor 1001 to read a predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communication via a communication device 1004, or controls at least one of reading and writing data in the memory 1002 and a storage 1003.

[0230] The processor 1001 controls the entire computer by operating, for example, an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the above-described control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0231] Also, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and the same may be true for other functional blocks.

[0232] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0233] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0234] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-described transceiver unit 120 (220), the transceiver antenna 130 (230), etc. may be implemented by the communication device 1004. The transceiver unit 120 (220) may be physically or logically separated into a transmitter unit 120a (220a) and a receiver unit 120b (220b).

[0235] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an external input. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0236] Also, 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 for each device.

[0237] In addition, 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), and a Field Programmable Gate Array (FPGA), and part or all of each functional block may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0238] (Modification example) Regarding the terms described in the present disclosure and the terms necessary for understanding the present disclosure, they may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be read interchangeably with each other. Also, a signal may be a message. A reference signal may also be abbreviated as RS and may be called a Pilot, a pilot signal, etc. depending on the applicable standard. Also, a Component Carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, etc.

[0239] 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 the radio frame may be called a subframe. Further, a subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0240] Here, the new numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The new numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering process performed by the transceiver in the frequency domain, specific windowing process performed by the transceiver in the time domain, etc.

[0241] A slot may be composed of one or more symbols (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Also, a slot may be a time unit based on the new numerology.

[0242] A slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, a mini-slot may be called a sub-slot. A mini-slot may be composed of a smaller number of symbols than a slot. The PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using a mini-slot may be called PDSCH (PUSCH) mapping type B.

[0243] 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.

[0244] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0245] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0246] 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.

[0247] In addition, when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. Also, the number of slots (number of mini-slots) constituting the minimum time unit for the scheduling may be controlled.

[0248] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0249] Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of a long TTI and not less than 1 ms.

[0250] A resource block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or a plurality of consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0251] Also, an RB may include one or a plurality of symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be constituted by one or a plurality of resource blocks.

[0252] Note that one or more RBs may be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0253] Also, a resource block may be composed of one or more Resource Elements (REs). For example, 1 RE may be a radio resource area of 1 sub-carrier and 1 symbol.

[0254] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. The PRB is defined in a certain BWP and may be numbered within that BWP.

[0255] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0256] At least one of the configured BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that in the present disclosure, "cell", "carrier", etc. may be read as "BWP".

[0257] Note that the structures such as the above-described radio frame, subframe, slot, mini-slot, and symbol 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 mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of sub-carriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be variously changed.

[0258] Also, the information, parameters, etc. described in this disclosure may be represented using absolute values, relative values from a predetermined value, or using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0259] The names used for parameters, etc. in this disclosure are not limiting names in any way. Furthermore, mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in this disclosure. Since various channels (such as PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any way.

[0260] The information, signals, etc. described in this disclosure may be represented using any of various 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 voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0261] Also, information, signals, etc. can be output at least one of from a higher layer to a lower layer and from a lower layer to a higher layer. Information, signals, etc. may be input and output via a plurality of network nodes.

[0262] The input / output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. The information, signals, etc. to be input / output may be overwritten, updated, or appended. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

[0263] 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 implemented by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0264] Note that physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Also, RRC signaling may also be referred to as an RRC message and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. Further, MAC signaling may be notified, for example, using a MAC Control Element (CE).

[0265] Also, the notification of predetermined information (e.g., the notification of "being X") is not limited to an explicit notification and may be performed implicitly (e.g., by not performing the notification of the predetermined information or by the notification of another piece of information).

[0266] 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).

[0267] 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.

[0268] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0269] 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).

[0270] 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", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0271] 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. can be used interchangeably. The base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0272] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of these smaller areas can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0273] In this disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" can be used interchangeably.

[0274] A mobile station may also be called 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 appropriate term.

[0275] At least one of the base station and the mobile station may also be called a transmitting device, receiving device, wireless communication device, etc. Note that at least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0276] The mobile object refers to an object that can move, and its moving speed is arbitrary, and it naturally includes the case where the mobile object is stationary. The mobile object includes, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, shovel cars, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, rear cars, rickshaws, ships (ship and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon, and is not limited thereto. Further, the mobile object may be a mobile object that autonomously travels based on an operation command.

[0277] The mobile object may be a vehicle (for example, a car, an airplane, etc.), a mobile object that moves without a person (for example, a drone, an autonomous driving vehicle, etc.), or a robot (a manned or unmanned type). Note that at least one of the base station and the mobile station includes a device that does not necessarily move during the communication operation. 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.

[0278] FIG. 12 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, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed 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.

[0279] The drive unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor. 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 an operation of the steering wheel operated by a user.

[0280] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may be called an Electronic Control Unit (ECU).

[0281] Examples of signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotational speed signal of the front wheels 46 / rear wheels 47 acquired by a rotational speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58, and so on.

[0282] The information service unit 59 is composed of various devices for providing (outputting) various information such as driving information, traffic information, and entertainment information, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from an external device via a communication module 60 or the like to provide various information / services (for example, multimedia information / multimedia services) to the passengers of the vehicle 40.

[0283] The information service unit 59 may include an input device for receiving external input (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.), or may include an output device for performing external output (for example, a display, speakers, an LED lamp, a touch panel, etc.).

[0284] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), Artificial Intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0285] 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.

[0286] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0287] 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.

[0288] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0289] 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.

[0290] Also, the base station in the present disclosure may be replaced by a user terminal. For example, for a configuration in which communication between the base station and the user terminal is replaced by communication between a plurality of user terminals (which may be referred to as, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the base station 10 described above may be configured to be functions of the user terminal 20. Also, terms such as "uplink" and "downlink" may be replaced with terms corresponding to communication between terminals (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be replaced with a sidelink channel.

[0291] Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, the functions of the user terminal 20 described above may be configured to be functions of the base station 10.

[0292] In the present disclosure, operations assumed to be performed by the base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having a base station, it is obvious that various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc., but not limited thereto), or a combination thereof.

[0293] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, regarding the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0294] Each aspect / embodiment described in the present disclosure may be applied to systems that utilize 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, a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other suitable wireless communication methods, next-generation systems extended, modified, created, or defined based on these, etc. Also, multiple systems may be combined (for example, a combination of LTE or LTE-A and 5G, etc.) and applied.

[0295] As used in this disclosure, the recitation “based on” does not mean “based solely on” unless otherwise specified. In other words, the recitation “based on” means both “based solely on” and “based at least in part on”.

[0296] Any reference in this disclosure to an element using terms such as “first,” “second,” etc. does not generally limit the amount or order of those elements. These terms may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements may be employed or that the first element must precede the second element in any way.

[0297] The term “determining” as used in this disclosure may encompass a variety of operations. For example, “determining” may be considered to be “judging,” “calculating,” “computing,” “processing,” “deriving,” “investigating,” “looking up, search, inquiry” (e.g., searching in a table, database or another data structure), “ascertaining,” etc.

[0298] Also, “determining” may be considered to be “receiving” (e.g., receiving information), “transmitting” (e.g., transmitting information), “input,” “output,” “accessing” (e.g., accessing data in memory), etc.

[0299] Also, "judgment (decision)" may be regarded as "resolving", "selecting", "choosing", "establishing", "comparing", etc. That is, "judgment (decision)" may be regarded as making a certain action.

[0300] Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

[0301] The "maximum transmit power" described in the present disclosure may mean the maximum value of the transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0302] As used in the present disclosure, the terms "connected" and "coupled", or any variations thereof, mean 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 "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 "accessed".

[0303] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and also, as some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, light (both visible and invisible) region, etc.

[0304] In the present disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may be interpreted in the same way as "different".

[0305] In the present disclosure, when terms such as "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0306] In the present disclosure, for example, when articles are added by translation, such as a, an and the in English, the present disclosure may include that the nouns following these articles are in the plural form.

[0307] As described above, the invention according to the present disclosure has been described in detail. However, it is obvious 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 changed forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit that receives information regarding a transmission configuration indication (TCI) state corresponding to a first physical cell identifier (PCI) corresponding to a serving cell and a TCI state corresponding to a second PCI corresponding to a cell different from the serving cell; a control unit that controls to receive the first downlink (DL) signal transmitted from the serving cell when the first DL signal transmitted from the serving cell and a second DL signal transmitted from a cell different from the serving cell overlap in a time domain and the first DL signal is a short message; a terminal having the same.

2. a step of receiving information regarding a transmission configuration indication (TCI) state corresponding to a first physical cell identifier (PCI) corresponding to a serving cell and a TCI state corresponding to a second PCI corresponding to a cell different from the serving cell; a step of controlling to receive the first DL signal when the first DL signal transmitted from the serving cell and a second DL signal transmitted from a cell different from the serving cell overlap in a time domain and the first DL signal is a short message; a wireless communication method for a terminal having the same.

3. a transmitting unit that transmits information regarding a transmission configuration indication (TCI) state corresponding to a first physical cell identifier (PCI) corresponding to a serving cell and a TCI state corresponding to a second PCI corresponding to a cell different from the serving cell; a control unit that determines that the terminal receives the first DL signal when the first DL signal transmitted from the serving cell and a second DL signal transmitted from a cell different from the serving cell overlap in a time domain and the first DL signal is a short message; a base station having the same.

4. A system having a terminal and a base station, wherein the terminal has a receiving unit that receives information regarding a transmission configuration indication (TCI) state corresponding to a first physical cell identifier (PCI) corresponding to a serving cell and a TCI state corresponding to a second PCI corresponding to a cell different from the serving cell; and a control unit that controls to receive the first DL signal when the first DL signal transmitted from the serving cell and a second DL signal transmitted from a cell different from the serving cell overlap in a time domain and the first DL signal is a short message; wherein the base station A system having a transmission unit that transmits the information.

Images