Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a reception unit that receives information indicating a spatial relationship between a reference reference signal (RS) and a target RS for transmission configuration indication (TCI) states of uplink (UL) and downlink (DL); and a control unit that controls to apply the TCI states to an UL channel and the target RS based on the information. According to one embodiment of the present disclosure, appropriate UL transmission can be implemented.

Description

TECHNICAL FIELD

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

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further higher-speed data rates, lower delay, and so on (Non-Patent Literature 1). Further, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further larger capacity, higher degree of integration, and so on of LTE (3rd Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] A subsequent system of LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G (plus), New Radio (NR), 3GPP Rel. 15 onwards, and so on) is also being studied.

[0004] PRIOR ART DOCUMENT

[0005] NON-PATENT LITERATURE

[0006] Non-Patent Literature 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)", April 2010 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In a future wireless communication system (for example, NR after Rel. 17), as a beam indication method for an uplink (UL) of a user terminal (User Equipment (UE)), an UL transmission configuration indication state (UL TCI state) is being studied.

[0009] Considering the UL TCI state scheduled to be adopted in such a future wireless communication system (for example, NR after Rel. 17), research has not progressed on how to control the UL beam used by the UE. If this control is not made clear, there is a concern that an increase in communication throughput is inhibited.

[0010] Here, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can implement appropriate UL transmission.

[0011] Means for solving the problem

[0012] The terminal according to one embodiment of the present disclosure has a reception unit that receives information indicating a spatial relationship between a reference reference signal (RS) and a target RS for a transmission configuration indication (TCI) state of an uplink (UL) and a downlink (DL), and a control unit that controls so that the TCI state is applied to an UL channel and the target RS based on the information.

[0013] Effects of the Invention

[0014] According to one embodiment of the present disclosure, appropriate UL transmission can be implemented. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a diagram indicating an example of an information element related to an existing TCI state.

[0016] Figure 2A and Figure 2B is a diagram indicating an example of an information element related to an existing spatial relationship.

[0017] Figure 3 is a diagram indicating an example of an indication method for an UL beam of a UE.

[0018] Figure 4 is a diagram indicating an example of an indication method for an UL beam of a UE.

[0019] Figure 5A and Figure 5Bis a diagram indicating an example of an information element newly defined in relation to a spatial relation between a reference RS and a target RS.

[0020] Figure 6 is a diagram indicating an example of an indication method for a UL beam of a UE.

[0021] Figure 7 is a diagram indicating an example of an information element newly defined in relation to a spatial relation between a reference RS and a target RS.

[0022] Figure 8 is a diagram indicating an example of an information element newly defined in relation to a spatial relation between a reference RS and a target RS.

[0023] Figure 9 is a diagram indicating an example of an outline structure of a wireless communication system according to an embodiment.

[0024] Figure 10 is a diagram indicating an example of a structure of a base station according to an embodiment.

[0025] Figure 11 is a diagram indicating an example of a structure of a user terminal according to an embodiment.

[0026] Figure 12 is a diagram indicating an example of a hardware structure of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0027] (TCI, spatial relation, QCL)

[0028] In NR, it is under study that a UE controls at least one of reception processing (for example, at least one of reception, demapping, demodulation, decoding) of a signal and a channel, transmission processing (for example, at least one of transmission, mapping, precoding, modulation, coding) of a signal and a channel, and the like, based on a transmission configuration indication state (TCI state) indicating a state of transmission configuration.

[0029] A TCI state can also indicate an element applied to a signal / channel of a downlink. An element equivalent to a TCI state applied to a signal / channel of an uplink can also be expressed as a spatial relation.

[0030] A TCI state refers to information related to quasi co-location (QCL) of a signal / channel, and can also be referred to as spatial reception parameter, spatial relation information, etc. A TCI state can also be configured to a UE per channel or per signal.

[0031] QCL refers to an indicator indicating a statistical property of a signal / channel. For example, in the case where a certain signal / channel is in a QCL relationship with other signals / channels, it can mean that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial parameter (e.g., a spatial Rx parameter) can be assumed to be the same among the different signals / channels (at least one of which is QCLed).

[0032] In addition, the spatial reception parameter can also correspond to a reception beam (e.g., a reception analog beam) of a UE, and the beam can also be determined based on spatial QCL. The QCL (or at least one element of the QCL) in the disclosure can also be replaced with sQCL (spatial QCL).

[0033] QCL can also be defined in multiple types (QCL types). For example, four QCL types, i.e., Types A-D, which can be set to assume the same parameters (or parameter sets) can be different, and the parameters (which can also be referred to as QCL parameters) are as follows:

[0034] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0035] • QCL Type B (QCL-B): Doppler shift and Doppler spread,

[0036] • QCL Type C (QCL-C): Doppler shift and average delay,

[0037] • QCL Type D (QCL-D): Spatial reception parameter.

[0038] Types A to C can also correspond to QCL information associated with synchronization processing of at least one of time and frequency, and Type D can also correspond to QCL information related to beam control.

[0039] The case where the UE assumes a specific control resource set (Control Resource Set (CORESET)), channel, or reference signal to be in a specific QCL (e.g., QCL Type D) relationship with other CORESETs, channels, or reference signals can also be referred to as a QCL assumption.

[0040] The UE can also decide at least one of a transmission beam (Tx beam) and a reception beam (Rx beam) of a signal / channel based on a TCI state or a QCL assumption of the signal / channel.

[0041] For example, the TCI state can also be information related to a QCL between a channel (or a reference signal (Reference Signal (RS)) for the channel) that is the object and another signal (e.g., another downlink reference signal (Downlink Reference Signal (DL-RS, downlink reference signal))). The TCI state can also be configured (indicated) through higher layer signaling, physical layer signaling, or a combination thereof.

[0042] In the disclosure, the higher layer signaling can be any one or a combination of, for example, radio resource control (Radio Resource Control (RRC)) signaling, medium access control (Medium Access Control (MAC)) signaling, broadcast information, and the like.

[0043] The MAC signaling can use, for example, a MAC control element (MAC Control Element (MAC CE)), a MAC protocol data unit (MAC Protocol Data Unit (PDU)), and the like. The broadcast information can be, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), minimum system information (Remaining Minimum System Information (RMSI)), other system information (Other System Information (OSI)), and the like.

[0044] The physical layer signaling can be, for example, downlink control information (Downlink Control Information (DCI)).

[0045] In addition, a channel / signal that becomes an application object of the TCI state can also be referred to as a target channel / RS, simply as a target, and the like, and the other signals described above can also be referred to as a reference RS, simply as a reference, and the like.

[0046] The channel for which the TCI state or the spatial relation is set (designated) can 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)).

[0047] In addition, the RS that is in a QCL relationship with the channel can 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 reference signal for measurement (Sounding Reference Signal (SRS)), a CSI-RS for tracking (also referred to as a Tracking Reference Signal (TRS)), and a reference signal for QCL detection (also referred to as a QRS).

[0048] The SSB is a signal block that includes 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)).

[0049] The UE can also receive, through higher layer signaling, setting information (for example, PDSCH-Config, tci-StatesToAddModList) that includes a list of information elements of the TCI state.

[0050] The information element of the TCI state set by the higher layer signaling (RRC "TCI-state IE") can also contain a TCI state ID and 1 or more QCL information ("QCL-Info"). The QCL information can also contain at least 1 of information related to the RS in the QCL relationship (RS relation information) and information indicating the QCL type (QCL type information). The RS relation information can also contain information such as the index of the RS (for example, SSB index, Non-Zero-Power (NZP) CSI-RS resource ID), the index of the cell where the RS is located, the index of the Bandwidth Part (BWP) where the RS is located, and the like.

[0051] In Rel. 15 NR, both the RS of QCL Type A and the RS of QCL Type D, or only the RS of QCL Type A, can be set to the UE as the TCI state of at least 1 of PDCCH and PDSCH.

[0052] In the case where the TRS is set as the RS of QCL Type A, it is assumed that the TRS is periodically transmitted as the same TRS over a long time, and is different from the DeModulation Reference Signal (DMRS) of PDCCH or PDSCH. The UE can measure the TRS and calculate the average delay, delay spread, and the like.

[0053] The UE to which the TCI state of the DMRS of PDCCH or PDSCH is set as the RS of QCL Type A can assume that the parameters of QCL Type A (average delay, delay spread, and the like) of the DMRS of PDCCH or PDSCH and the TRS are the same, and thus can derive the parameters of Type A (average delay, delay spread, and the like) of the DMRS of PDCCH or PDSCH from the measurement result of the TRS. The UE can perform more accurate channel estimation using the measurement result of the TRS when performing channel estimation of at least 1 of PDCCH and PDSCH.

[0054] The UE to which the RS of QCL Type D is set can determine the UE receive beam (spatial domain reception filter, UE spatial domain reception filter) using the RS of QCL Type D.

[0055] The RS of QCL Type X of the TCI state can mean the RS in the QCL Type X relationship with the (DMRS of) certain channel / signal, and the RS can also be referred to as the QCL source of QCL Type X of the TCI state.

[0056] Figure 1 is an example of an information element indicating information related to an existing TCI state. The UE can also receive information related to a TCI state using the information element shown in Figure 1 .

[0057] <TCI state for PDCCH>

[0058] Information related to QCL between a PDCCH (or a DMRS antenna port associated with the PDCCH) and a certain RS can also be referred to as a TCI state for PDCCH, etc.

[0059] The UE can also determine a TCI state for a UE-specific PDCCH (CORESET) based on higher layer signaling. For example, the UE can be configured with one or more (K) TCI states per CORESET by RRC signaling.

[0060] For each CORESET, the UE can also be activated one of a plurality of TCI states configured by RRC signaling by a MAC CE. The MAC CE can also be referred to as a TCI state indication MAC CE for UE-specific PDCCH (TCI State Indication for UE-specific PDCCH MAC CE). The UE can also perform monitoring of the CORESET based on the activated TCI state corresponding to the CORESET.

[0061] <TCI state for PDSCH>

[0062] Information related to QCL between a PDSCH (or a DMRS antenna port associated with the PDSCH) and a DL-RS can also be referred to as a TCI state for PDSCH, etc.

[0063] The UE can also be notified (configured) of M (M≥1) TCI states for PDSCH (M pieces of QCL information for PDSCH) by higher layer signaling. In addition, the number M of TCI states configured to the UE can be limited by at least one of a UE capability and a QCL type.

[0064] A DCI for scheduling of a PDSCH can also include a specific field indicating a TCI state for the PDSCH (for example, can also be referred to as a TCI field, a TCI state field, etc.). The DCI can also be used for scheduling of a PDSCH for one cell, for example, can also be referred to as a DL DCI, a DL assignment, a DCI format 1_0, a DCI format 1_1, etc.

[0065] Whether the TCI field is included in the DCI can also be controlled by information notified from the base station to the UE. The information can also be information indicating whether the TCI field is present (present or absent) in the DCI (for example, TCI present information, TCI present in DCI information, higher layer parameter TCI-PresentInDCI). The information can also be set to the UE, for example, by higher layer signaling.

[0066] In a case where the UE is set with more than 8 TCI states, a MAC CE can also be used to activate (or specify) 8 or fewer TCI states. The MAC CE can also be referred to as a TCI state activation / deactivation MAC CE for UE-specific PDSCH (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE). The value of the TCI field in the DCI can also indicate one of the TCI states activated by the MAC CE.

[0067] In a case where the UE is set with TCI present information set to "enabled" for a CORESET (CORESET used in transmission of a PDCCH scheduling a PDSCH), the UE can also assume that the TCI field is present in the DCI format 1_1 of the PDCCH transmitted on the CORESET.

[0068] In a case where the UE is not set with TCI present information for a CORESET scheduling a PDSCH, or the PDSCH is scheduled by a DCI format 1_0, in a case where the time offset between the reception of the DL DCI (DCI scheduling the PDSCH) and the reception of the PDSCH corresponding to the DCI is equal to or more than a threshold, in order to decide the QCL of the PDSCH antenna port, the UE can also assume that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied for the CORESET used in transmission of a PDCCH scheduling the PDSCH.

[0069] In a case where TCI present information is set to "enabled", in a case where a TCI field in a DCI within a component carrier (CC) that schedules (a PDSCH) indicates a TCI state that is activated within the scheduled CC or DL BWP, and the PDSCH is scheduled by a DCI format 1_1, in order to decide a QCL of an antenna port of the PDSCH, the UE can also use a TCI based on a value of the TCI field within the PDCCH in which the DCI is detected. In a case where a time offset between reception of a DL DCI (that schedules the PDSCH) and the PDSCH (that is scheduled by the DCI) is above a threshold, the UE can also assume that a DM-RS port of the PDSCH of the serving cell is QCLed with a RS that is a RS within a TCI state that is given by a QCL type parameter indicated by the TCI state.

[0070] In a case where the UE is configured with a single-slot PDSCH, the indicated TCI state can also be based on an activated TCI state within a slot with the scheduled PDSCH. In a case where the UE is configured with a multi-slot PDSCH, with respect to the indicated TCI state, the UE can also expect to be the same across slots with the scheduled PDSCH, based on an activated TCI state within a first slot with the scheduled PDSCH. In a case where the UE is configured with a CORESET that is associated with a search space set for cross-carrier scheduling, in a case where TCI present information is set to "enabled" for the CORESET by the UE, at least one of TCI states configured for a serving cell scheduled by the search space set contains a QCL Type D, the UE can also assume that a time offset between a detected PDCCH and a PDSCH corresponding to the PDCCH is above a threshold.

[0071] In the RRC connected mode, in the case where the TCI information within the DCI (the higher layer parameter TCI-PresentInDCI) is set to "enabled" and in the case where the TCI information is not set within the DCI, the UE can also assume that the DM-RS ports of the PDSCH of the serving cell are QCLed with the RS related to the QCL parameters used in the QCL indication of the PDCCH of the CORESET associated with the monitored search space having the lowest CORESET-ID (lowest, lowest) among the 1 or more CORESETs monitored by the UE in the latest (latest, latest) slot within the active BWP of the serving cell Figure 1 ) in the case where the time offset between the reception of the DL DCI (the DCI scheduling the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than a threshold value.

[0072] The time offset between the reception of the DL DCI and the reception of the PDSCH corresponding to the DCI can also be referred to as the scheduling offset.

[0073] In addition, the above-mentioned threshold value can also be referred to as the time length (time duration) for QCL, "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold value, scheduling offset threshold value, and the like.

[0074] The QCL time length can be based on a UE capability, or based on a delay related to PDCCH decoding and beam switching, for example. The QCL time length can also be the minimum time required for a UE to apply spatial QCL information received within a DCI for PDCCH reception and PDSCH processing. The QCL time length can be expressed in terms of the number of symbols per subcarrier spacing, or in terms of time (e.g., μs). The information of the QCL time length can be reported from the UE to the base station as UE capability information, or can be configured to the UE from the base station using higher layer signaling.

[0075] For example, the UE can also assume that the DMRS port of the PDSCH and the DL-RS based on the TCI state activated for the CORESET corresponding to the minimum CORESET-ID are QCL. The latest slot can be, for example, the slot in which the DCI scheduling the PDSCH is received.

[0076] In addition, the CORESET-ID can be an ID (ID for identification of CORESET, controlResourceSetId) configured by the RRC information element "ControlResourceSet".

[0077] In the case where no CORESET is configured for the CC, the default TCI state can be the activated TCI state with the lowest ID that can be applied to the PDSCH within the activated DL BWP of the CC.

[0078] In Rel. 16 and later, in the case where a PDSCH and a PDCCH scheduling the PDSCH exist within different component carriers (cross-carrier scheduling), if the time delay from the PDCCH to the PDSCH (PDCCH-to-PDSCH delay) is shorter than the QCL time length, or if a TCI state is not present in the DCI for the scheduling, the UE can assume the QCL for the scheduled PDSCH from the activated TCI state with the lowest ID that can be applied to the PDSCH within the activated BWP of the scheduled cell.

[0079] <Space relation for PUCCH>

[0080] The UE can also be configured with parameters for PUCCH transmission (PUCCH configuration information, PUCCH-Config) through higher layer signaling (e.g., Radio Resource Control (RRC) signaling). The PUCCH configuration information can also be configured per each of the sub-bands (e.g., uplink bandwidth parts (BWPs)) within a carrier (cell, component carrier (CC) also referred to as).

[0081] The PUCCH configuration information can also include a list of PUCCH resource set information (e.g., PUCCH-ResourceSet) and a list of PUCCH spatial relation information (e.g., PUCCH-SpatialRelationInfo).

[0082] The PUCCH resource set information can also include a list of PUCCH resource indices (IDs, e.g., PUCCH-ResourceId) (e.g., resourceList).

[0083] Further, in a case where the UE does not have dedicated PUCCH resource configuration information (e.g., dedicated PUCCH resource configuration) provided by the PUCCH resource set information within the PUCCH configuration information (before RRC configuration), the UE can also determine a PUCCH resource set based on parameters (e.g., pucch-ResourceCommon) within system information (e.g., System Information Block Type 1 (SIB1) or Remaining Minimum System Information (RMSI)). The PUCCH resource set can also include 16 PUCCH resources.

[0084] On the other hand, in a case where the UE has the above-described dedicated PUCCH resource configuration information (UE-specific uplink control channel configuration, dedicated PUCCH resource configuration) (after RRC configuration), the UE can also determine a PUCCH resource set depending on the number of UCI information bits.

[0085] The UE can also determine one PUCCH resource (index) within the above-mentioned PUCCH resource set (e.g., PUCCH resource set determined cell-specifically or UE- specifically) based on at least one of a value of a specific field (e.g., PUCCH resource indicator field) within Downlink Control Information (DCI) (e.g., DCI format 1_0 or 1_1 for scheduling of PDSCH), a number of CCEs (N CCE ) within a Control Resource Set (CORESET) for PDCCH reception of which the DCI is transmitted, CCE，0 ) of the first (initial) CCE of the PDCCH reception.

[0086] PUCCH spatial relation information (e.g., “PUCCH-spatialRelationInfo” of RRC information element) can also indicate multiple candidate beams (spatial domain filters) for PUCCH transmission. The PUCCH spatial relation information can also indicate a spatial relation between a RS (Reference signal) and a PUCCH.

[0087] Figure 2A is a diagram indicating an example of existing PUCCH spatial relation information. The UE can also receive PUCCH spatial relation information using information (e.g., RRC information element) as shown in Figure 2A .

[0088] In addition, in the present disclosure, an index, an ID, an indicator, a resource ID, etc. can also be replaced with each other.

[0089] A list of PUCCH spatial relation information can also contain several elements (PUCCH spatial relation information IE (Information Element)). Each PUCCH spatial relation information can contain, for example, an index (ID) of PUCCH spatial relation information (e.g., pucch-SpatialRelationInfoId), an index (ID) of a serving cell (e.g., servingCellId), and at least one of information related to a RS (reference RS) in spatial relation with a PUCCH.

[0090] For example, the RS-related information can also be an SSB index, a CSI-RS index (e.g., NZP-CSI-RS resource structure ID), or an SRS resource ID, and an ID of a BWP. The SSB index, the CSI-RS index, and the SRS resource ID can also be associated with at least one of a beam, a resource, a port selected by measurement of the corresponding RS.

[0091] The UE can also be controlled by a PUCCH spatial relation activation / deactivation MAC CE (PUCCH spatial relation Activation / Deactivation MAC CE) to activate one PUCCH spatial relation information for one PUCCH resource at a certain time, in a case where more than one PUCCH-related spatial relation information is set.

[0092] The PUCCH spatial relation activation / deactivation MAC CE of Rel. 15 NR is expressed in a total of 3 octets (8 bits x 3 = 24 bits) of Octet 1-3.

[0093] The MAC CE can also include information such as a serving cell ID to which the object is applied (“Serving Cell ID” field), a BWP ID (“BWP ID” field), a PUCCH resource ID (“PUCCH Resource ID” field), and the like.

[0094] In addition, the MAC CE includes a field of “S i ” (i = 0-7). In a case where the field of the S i i indicates 1, the UE activates the spatial relation information of the spatial relation information ID #i. In a case where the field of the S i i indicates 0, the UE deactivates the spatial relation information of the spatial relation information ID #i.

[0095] The UE can also activate the PUCCH relation information specified by the MAC CE after 3 ms from transmission of an ACK (ACK) for the MAC CE for activating a specific PUCCH spatial relation information.

[0096] <Space relation for SRS, PUSCH>

[0097] The UE can also receive information (SRS configuration information, e.g., parameters within “SRS-Config” of an RRC control element) used in transmission of a measurement reference signal (e.g., a sounding reference signal (SRS)).

[0098] Specifically, the UE can also receive information related to one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet" of an RRC control element), at least one of information related to one or more SRS resources (SRS resource information, e.g., "RS-Resource" of an RRC control element).

[0099] One SRS resource set can also be associated with a specific number of SRS resources (and the specific number of SRS resources can also be grouped). Each SRS resource can also be determined by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0100] The SRS resource set information can also include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, information on the usage of the SRS.

[0101] Here, the SRS resource type can also indicate any one of a periodic SRS (P-SRS), a semi-persistent SRS (SP-SRS), and an aperiodic SRS (A-SRS, AP-SRS). In addition, the UE can periodically (or periodically after activation) transmit the P-SRS and the SP-SRS, and transmit the A-SRS based on a DCI-based SRS request.

[0102] Furthermore, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can be, for example, beam management, codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching, etc. The SRS of the usage of the codebook-based transmission or the non-codebook-based transmission can also determine a precoder for SRI-based codebook-based or non-codebook-based PUSCH transmission.

[0103] For example, in case of codebook-based transmission, the UE can also decide a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), and a Transmitted Precoding Matrix Indicator (TPMI). In case of non-codebook-based transmission, the UE can also decide a precoder for PUSCH transmission based on the SRI.

[0104] The SRS resource information can also include an SRS resource ID (SRS-ResourceId), a number of SRS ports, SRS port numbers, a transmission Comb, SRS resource mapping (e.g., time and / or frequency resource locations, a resource offset, a periodicity of resources, a number of repetitions, a number of SRS symbols, an SRS bandwidth, etc.), hopping association information, an SRS resource type, a sequence ID, spatial relation information for SRS, etc.

[0105] The spatial relation information for SRS (e.g., an RRC information element "spatialRelationInfo") can also indicate spatial relation information between a specific reference signal and the SRS. The specific reference signal can be at least one of a synchronization signal / physical broadcast channel (SS / PBCH) block, a channel state information reference signal (CSI-RS), and an SRS (e.g., another SRS). The SS / PBCH block can also be referred to as a synchronization signal block (SSB).

[0106] Figure 2B is a diagram illustrating an example of existing spatial relation information for SRS. The UE can receive the spatial relation information for SRS using information (e.g., an RRC information element) as shown in Figure 2B

[0107] As an index of the above-described specific reference signal, the spatial relation information for SRS can include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID.

[0108] ​Also, in the present disclosure, an SSB index, an SSB resource ID, and an SSBRI (SSB Resource Indicator) can also be replaced with each other. Further, a CSI-RS index, a CSI-RS resource ID, and a CRI (CSI-RS Resource Indicator) can also be replaced with each other. Furthermore, an SRS index, an SRS resource ID, and an SRI can also be replaced with each other.

[0109] The spatial relation information of the SRS can also include a serving cell index, a BWP index (BWP ID), and the like corresponding to the above-described specific reference signal.

[0110] In NR, the transmission of an uplink signal can also be controlled based on the presence or absence of beam correspondence (BC). The BC can also refer to, for example, the ability of a certain node (e.g., a base station or a UE) to decide a beam (transmission beam, Tx beam) for signal transmission based on a beam (reception beam, Rx beam) for signal reception.

[0111] In addition, the BC can also be referred to as transmission / reception beam correspondence (Tx / Rx beam correspondence), beam reciprocity, beam calibration, calibrated / non-calibrated, reciprocity calibrated / non-calibrated, correspondence, consistency, and the like.

[0112] For example, in the case of no BC, the UE transmits an uplink signal (e.g., PUSCH, PUCCH, SRS, or the like) using the same beam (spatial domain transmission filter) as the SRS (or SRS resource) indicated by the base station based on the measurement result of one or more SRSs (or SRS resources).

[0113] On the other hand, in the case of BC, the UE can also transmit an uplink signal (e.g., PUSCH, PUCCH, SRS, or the like) using the same or corresponding beam (spatial domain transmission filter) as the beam (spatial domain reception filter) used for reception of a specific SSB or CSI-RS (or CSI-RS resource).

[0114] In the case where spatial relation information related to SSB or CSI-RS, SRS is configured for a certain SRS resource (e.g., in the case of BC), the UE can also use the same spatial domain filter (spatial domain transmission filter) for the reception of the SSB or CSI-RS to transmit the SRS resource. In this case, the UE can also assume that the UE reception beam of the SSB or CSI-RS is the same as the UE transmission beam of the SRS.

[0115] In the case where spatial relation information related to other SRS (reference SRS) and the SRS (target SRS) is configured for a certain SRS (target SRS) resource (e.g., in the case of no BC), the UE can also use the same spatial domain filter (spatial domain transmission filter) for the transmission of the reference SRS to transmit the target SRS resource. That is, in this case, the UE can also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0116] The UE can also determine the spatial relation of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on the value of a certain field (e.g., SRS resource indicator (SRI) field) within the DCI. Specifically, the UE can use the spatial relation information (e.g., RRC information element "spatialRelationInfo") of the SRS resource determined based on the value of the certain field (e.g., SRI) for the PUSCH transmission.

[0117] In the case of using codebook-based transmission for the PUSCH, the UE can be configured with 2 SRS resources through RRC and 1 of the 2 SRS resources can be indicated through DCI (1-bit certain field). In the case of using non-codebook-based transmission for the PUSCH, the UE can be configured with 4 SRS resources through RRC and 1 of the 4 SRS resources can be indicated through DCI (2-bit certain field). In order to use a spatial relation other than the 2 or 4 spatial relations configured through RRC, RRC reconfiguration is necessary.

[0118] In addition, for the spatial relation of the SRS resource for the PUSCH, a DL-RS can be configured. For example, for SP-SRS, the UE can be configured with the spatial relation of a plurality of (e.g., up to 16) SRS resources through RRC and 1 of the plurality of SRS resources can be indicated through MAC CE.

[0119] <ul tci状态>

[0120] In future wireless communication systems (e.g., NR beyond Rel. 17), the use of UL TCI state as a beam indication method for UL is being studied. The UL TCI state is similar to the notification of the UE's DL beam (DL TCI state). In addition, the DL TCI state can also be replaced with the TCI state for PDCCH / PDSCH.

[0121] The channel / signal (may also be referred to as the target channel / RS) to which the UL TCI state is set (specified) can be at least one of, for example, PUSCH (DMRS of PUSCH), PUCCH (DMRS of PUCCH), Physical Random Access Channel (PRACH), SRS, etc.

[0122] In addition, the RS (source RS) that is in a QCL relationship with the channel / signal can be either a DL RS (e.g., SSB, CSI-RS, TRS, etc.) or an UL RS (e.g., SRS, SRS for beam management, etc.).

[0123] In the UL TCI state, the RS that is in a QCL relationship with the channel / signal can also be associated with a panel ID for receiving or transmitting the RS. The association can be explicitly set (or specified) through higher layer signaling (e.g., RRC signaling, MAC CE, etc.) or can be implicitly determined.

[0124] The correspondence between the RS and the panel ID can be set by being included in the UL TCI state information or by being included in at least one of the resource setting information, spatial relationship information, etc. of the RS.

[0125] The QCL type indicated by the UL TCI state can be any of the existing QCL types A-D, other QCL types, or a specific spatial relationship, associated antenna port (port index), etc.

[0126] If the associated panel ID is specified (e.g., specified through DCI) for UL transmission, the UE can also use the panel corresponding to the panel ID for the UL transmission. The panel ID can also be associated with the UL TCI state, and in the case where the UL TCI state is specified (or activated) for a specific UL channel / signal, the UE can determine the panel used in the transmission of the UL channel / signal according to the panel ID associated with the UL TCI state.

[0127] Given the UL TCI state that is slated to be adopted in future wireless communication systems, research on how to control the UL beam used by the UE has not yet progressed. Without making this control explicit, there are concerns that the increase in communication throughput may be suppressed.

[0128] In addition, research is being conducted on a framework related to the setting of public QCLs that can be applied to both DL and UL.

[0129] Here, the inventors of this invention conceived of a new framework for UL TCI status.

[0130] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0131] (Wireless communication method)

[0132] The UE can also receive information from the network (NW, such as gNB) that has been newly defined and relates to the spatial relationship (or QCL setting) between the reference RS and the target RS.

[0133] The UE can also determine the UL beam to use based on newly defined information relating to the spatial relationship between the reference RS and the target RS.

[0134] For example, such as Figure 3 As shown, the UE receives information from the NW that has been newly defined and relates to the spatial relationship (TCI state) between the reference RS and the target RS.

[0135] Next, based on the newly defined information relating to the spatial relationship (TCI state) between the reference RS and the target RS, the UE determines the UL beam to be used and transmits UL to the NW.

[0136] In this disclosure, the newly defined information relating to the spatial relationship between the reference RS and the target RS can be interchanged with information relating to the UL TCI status, information relating to the TCI status publicized in DL and UL, etc.

[0137] The TCI state can also be replaced by the TCI state, QCL concept, QCL parameters, spatial domain receiver filter, UE spatial domain receiver filter, spatial domain filter, UE receiver beam, DL receiver beam, DL-RS, etc. The RS of QCL type D, the DL-RS associated with QCL type D, the DL-RS with QCL type D, the source of the DL-RS, SSB, and CSI-RS can also be interchanged.

[0138] In the present disclosure, the TCI state can also be information related to a reception beam (spatial domain reception filter) indicated (set) to the UE (e.g., DL-RS, QCL type, cell in which the DL-RS is transmitted, etc.). The QCL assumption can also be information related to a reception beam (spatial domain reception filter) (e.g., DL-RS, QCL type, cell in which the DL-RS is transmitted, etc.) assumed by the UE based on transmission or reception of a signal (e.g., PRACH) to which association is made.

[0139] In the present disclosure, the UL TCI state can also be replaced with a transmission beam of the UE, a UL beam, a spatial relation of the UL TCI state, a spatial relation, etc. interchangeably. The UL beam can also mean a transmission beam of PUCCH / PUSCH.

[0140] In the present disclosure, the "panel ID" can also be replaced with a TRP, a panel, a TRP ID, a panel ID, a CORESET group ID of a CORESET for a PDCCH from a TRP or a panel, a CORESET ID indicating a CORESET of a PDCCH from a TRP or a panel, and other indexes (DMRS port group ID, etc.) corresponding to a TRP or a panel, interchangeably.

[0141] In the present disclosure, the SRS can also be replaced with at least one of an aperiodic SRS (A-SRS), a periodic SRS (P-SRS), and a semi-persistent (SP-SRS).

[0142] <Embodiment 1>

[0143] In Embodiment 1, as a framework of a new UL TCI, a method of informing a UE of information newly defined in relation to a spatial relation (or QCL setting) between a reference RS and a target RS is described. In addition, as a framework of a new UL TCI, application of information related to a spatial relation between a reference RS and a target RS is described.

[0144] The UE can receive information newly defined in relation to a spatial relation (e.g., UL TCI state) between a reference RS and a target RS. For example, as shown in FIG. 1, the UE receives information newly defined in relation to a spatial relation (e.g., UL TCI state) between a reference RS and a target RS from the NW. Figure 4

[0145] Next, the UE determines a UL beam used by the UE based on the information newly defined in relation to a spatial relation (e.g., UL TCI state) between a reference RS and a target RS, and performs UL transmission to the NW.

[0146] ​The UE can also receive the newly defined information on the spatial relation between the reference RS and the target RS (e.g., UL TCI state) through at least one of higher layer signaling and physical layer signaling. Further, the UE can also receive the information by combining the higher layer signaling and the physical layer signaling.

[0147] The newly defined information on the spatial relation between the reference RS and the target RS can also be specific information (e.g., spatialRelationInfo-r17) of, for example, an RRC information element. The reference RS can also be at least one of, for example, an SSB, a CSI-RS, and an SRS. The target RS can also be at least one of, for example, an UL RS (e.g., at least one of a DMRS for demodulating PUCCH or PUSCH, a PRACH, and an SRS).

[0148] Within the specific information (e.g., spatialRelationInfo-r17) element, a certain number (e.g., X (X is an integer of 0 or more)) of indices (IDs, e.g., SpatialRelationInfoId) related to the specific information can also be set. In the certain number (e.g., X) of indices related to the specific information, a certain number (e.g., X) of subsets of information on the spatial relation can also be set for each target RS (e.g., at least one of SRS, PUCCH-Config, PUSCH-Config, and PRACH).

[0149] Regarding the newly defined information on the spatial relation between the reference RS and the target RS, the UE can also activate / deactivate the information on the spatial relation for a certain channel / RS (e.g., SRS, PUCCH, PUSCH) through a combination of RRC signaling and MAC CE.

[0150] Further, regarding the newly defined information on the spatial relation between the reference RS and the target RS, the UE can also dynamically receive the information on the spatial relation for a certain channel / RS (e.g., aperiodic SRS, PUSCH, PRACH (e.g., PRACH indicated by PDCCH transmission of a DCI format including a new field), and PUCCH (e.g., PUCCH indicated by a new field within a DL assignment)) through L1 signaling (e.g., downlink control information (DCI)).

[0151] The UE can also receive information about spatial relation (UL TCI state) applied to a specific channel / RS through physical layer signaling (L1 signaling). The specific channel / RS is configured (indicated) with resource-related information (e.g., resource ID), but different spatial relations can also be configured for each of the configured (indicated) resources. In other words, the UE can also assume that a different spatial relation (UL TCI state) is configured per resource configured for the specific channel / RS.

[0152] For example, information about spatial relation between a reference RS and a target RS (e.g., spatialRelationInfo-r17) can also be information elements about spatial relation between a reference RS and a target RS as shown in Figure 5A Within the information elements of spatialRelationInfo-r17, a certain number (e.g., X) of indices (SpatialRelationInfoId) related to specific information can also be configured.

[0153] In addition, as shown in Figure 5B Within the information elements about spatial relation between a reference RS and a target RS (e.g., spatialRelationInfo-r17), information about a panel (e.g., ID, index (panelIndex)) can also be configured. The information about a panel can also be at least one of information about a UE antenna group (UE antenna group ID), information about a specific RS group (specific RS group ID), or other similar IDs.

[0154] The newly defined information about spatial relation between a reference RS and a target RS (e.g., spatialRelationInfo-r17) can also be applied to a certain UL channel / RS. For example, the newly defined information about spatial relation between a reference RS and a target RS (e.g., spatialRelationInfo-r17) can also be applied to all UL channels / RS. In other words, the UE can be configured only with the newly defined information about spatial relation between a reference RS and a target RS (e.g., spatialRelationInfo-r17) and replace the existing spatial relation.

[0155] In addition, for example, the newly defined information about spatial relation between a reference RS and a target RS (e.g., spatialRelationInfo-r17) can also be applied to a number of UL channels / RS, and information about the existing spatial relation can be applied to the remaining UL channels / RS.

[0156] In this case, the newly defined information on the spatial relation between the reference RS and the target RS (e.g., spatialRelationInfo-r17) and the existing information on the spatial relation can also be commonly configured to the UE for different UL channels / RSs. At this time, for one UL channel / RS, the information on one spatial relation can also be applied through higher layer signaling (e.g., RRC configuration / reconfiguration).

[0157] In addition, in this case, in the case where one newly defined information on the spatial relation between the reference RS and the target RS (e.g., spatialRelationInfo-r17) or the existing information on the spatial relation is configured for one UL channel / RS, different spatial relations can also be applied in the RRC reconfiguration.

[0158] <Embodiment 2>

[0159] In Embodiment 2, as a unified framework of the new UL TCI and the DL TCI, a method of informing the UE of the newly defined information on the spatial relation between the reference RS and the target RS (or the configuration of the QCL) is performed. In addition, as the unified framework of the new UL TCI and the DL TCI, the application of the information on the spatial relation between the reference RS and the target RS is described.

[0160] The UE can also receive the newly defined information on the spatial relation between the reference RS and the target RS (e.g., the TCI state unified for UL and DL). For example, as shown in FIG. 10, the UE receives the newly defined information on the spatial relation between the reference RS and the target RS (e.g., the TCI state unified for UL and DL) from the NW. Figure 6

[0161] Next, the UE decides the UL beam used by the UE based on the newly defined information on the spatial relation between the reference RS and the target RS (e.g., the TCI state unified for UL and DL) and performs UL transmission to the NW. In addition, based on the information, DL reception from the NW is controlled. In addition, the number and order of UL transmission and DL reception are not limited thereto.

[0162] The UE can also receive the newly defined information on the spatial relation between the reference RS and the target RS (e.g., the TCI state unified for UL and DL) through at least one of the higher layer signaling and the physical layer signaling. In addition, the UE can also receive the information by combining the higher layer signaling and the physical layer signaling.

[0163] ​The information on the spatial relation between the reference RS and the target RS can also be specific information (e.g., UnifiedTciState-r17) of, for example, an RRC information element. The reference RS can also be at least one of, for example, an SSB, a CSI-RS, and an SRS. The target RS can also be at least one of, for example, an UL RS (e.g., at least one of a DMRS for demodulating PUCCH or PUSCH, a PRACH, and an SRS) and a DL RS (e.g., at least one of a DMRS for demodulating PDCCH or PDSCH, and a CSI-RS).

[0164] The above-described specific information (e.g., UnifiedTciState-r17) can also be configured (applied) in a UE that performs beam management with little use of uplink.

[0165] In addition, the newly defined information on the spatial relation between the reference RS and the target RS (e.g., UnifiedTciState-r17) can be used in only the indication of the UL beam or in the respective indications of the UL beam and the DL beam.

[0166] Within the element of the specific information (e.g., UnifiedTciState-r17), a certain number (e.g., Y (Y is an integer of 0 or more)) of indices (IDs, e.g., utci-StateID) related to the specific information can also be configured.

[0167] Regarding the newly defined information on the spatial relation between the reference RS and the target RS (e.g., UnifiedTciState-r17), the UE can also be activated / deactivated by a combination of RRC signaling and a MAC CE with respect to the information on the spatial relation for a certain channel / RS (e.g., PDCCH, PDSCH, CSI-RS, SRS, PUCCH, PUSCH).

[0168] In addition, regarding the newly defined information on the spatial relation between the reference RS and the target RS (e.g., UnifiedTciState-r17), the UE can also dynamically receive, through L1 signaling (e.g., downlink control information (DCI)), information on the spatial relation for a certain channel / RS (e.g., aperiodic CSI-RS, aperiodic SRS, PUSCH, PRACH (e.g., PRACH indicated by a PDCCH transmitting a DCI format including a new field), and PUCCH (e.g., PUCCH indicated by a new field within a DL assignment)).

[0169] The UE can also receive information about spatial relations (TCI states commonized for UL and DL) applied to a specific channel / RS through physical layer signaling (L1 signaling). The specific channel / RS is configured (indicated) with information about resources (e.g., resource IDs), but each of the configured (indicated) resources can also be configured with a different spatial relation (TCI states commonized for UL and DL and QCL assumptions). In other words, the UE can also assume that a different spatial relation (TCI states commonized for UL and DL) is configured per resource configured for the specific channel / RS.

[0170] For example, information about spatial relations between a reference RS and a target RS (e.g., UnifiedTciState-r17) can also be information elements about spatial relations between a reference RS and a target RS as shown in Figure 7 Within the information elements of UnifiedTciState-r17, a certain number (e.g., Y) of indices (utci-StateID) about specific information can also be configured.

[0171] In addition, as shown in Figure 8 Within the information elements about spatial relations between a reference RS and a target RS (e.g., UnifiedTciState-r17), information about panels (e.g., IDs, indices (panelIndex)) can also be configured. The information about panels can also be at least one of information about a UE antenna group (UE antenna group ID), information about a specific RS group (specific RS group ID), or other similar IDs.

[0172] In addition, in the case of DL, the newly defined information elements about spatial relations between a reference RS and a target RS (e.g., UnifiedTciState-r17) can be configured per DL BWP in the DL TCI state. Within the newly defined information elements about spatial relations between a reference RS and a target RS (e.g., UnifiedTciState-r17), in the case where information about SRS (e.g., srs) is configured, information about an UL BWP (e.g., uplinkBWP) needs to be configured to identify the UL BWP corresponding to the SRS resource ID.

[0173] Further, in the case of UL, the newly defined information (for example, UnifiedTciState-r17) element related to the spatial relation between the reference RS and the target RS can be set per UL BWP in the UL TCI state. Within the newly defined information (for example, UnifiedTciState-r17) element related to the spatial relation between the reference RS and the target RS, in the case where information related to CSI-RS (for example, csi-rs) or information related to SSB (for example, ssb) is set, information related to DL BWP (for example, downlinkBWP) needs to be set so as to identify the DL BWP corresponding to the CSI-RS resource ID or the SSB resource ID, respectively.

[0174] However, in the existing RRC signaling, in the case of the UL spatial relation structure, only the ID (BWP-Id) constituting the information related to UL BWP (for example, uplinkBWP) is constituted within the information related to SRS (for example, srs), and the ID (BWP-Id) constituting the information related to DL BWP (for example, downlinkBWP) is not constituted within the information related to CSI-RS (for example, csi-rs) element or the information related to SSB (for example, ssb) element. Therefore, the ID (BWP-Id) constituting the information related to BWP (for example, uplinkBWP) can also not be constituted.

[0175] In the case where the newly defined information (for example, UnifiedTciState-r17) related to the spatial relation between the reference RS and the target RS is applied, a plurality of information (for example, qcl-Type) for distinguishing different QCL types for DL can also be applied. In this case, the information for distinguishing different QCL types that can be applied in DL and UL can be common or different. For example, only a specific QCL type (for example, QCL type D) can be applied for UL. Accordingly, as for the information for distinguishing different QCL types applied to UL, simplification can be made.

[0176] In the case where the newly defined information (for example, UnifiedTciState-r17) related to the spatial relation between the reference RS and the target RS is applied, a 2-stage QCL / TCI structure can also be applied based on the information (for example, UnifiedTciState-r17).

[0177] For the respective channels / signals of UL and DL, the respective dedicated index related to the specific information of DL (e.g., downlink-utci-StateID) and the respective dedicated index related to the specific information of UL (e.g., uplink-utci-StateID) can also be set by selecting a different index related to the specific information (e.g., utci-StateID) respectively (1st stage), and setting the index related to the specific information of DL (e.g., downlink-utci-StateID) and the index related to the specific information of UL (e.g., uplink-utci-StateID) respectively (2nd stage).

[0178] The index related to the specific information of DL (e.g., downlink-utci-StateID) and the index related to the specific information of UL (e.g., uplink-utci-StateID) can also be set from 0 to the maximum index respectively. The maximum index of the index related to the specific information of DL (e.g., downlink-utci-StateID) and the index related to the specific information of UL (e.g., uplink-utci-StateID) can be the same or different.

[0179] The index related to the specific information (e.g., utci-StateID) that can be commonly selected for the index related to the specific information of DL (e.g., downlink-utci-StateID) and the index related to the specific information of UL (e.g., uplink-utci-StateID) can also be only for a specific QCL type (e.g., QCL Type D).

[0180] In addition, the index related to the specific information (e.g., utci-StateID) that can be commonly selected for the index related to the specific information of DL (e.g., downlink-utci-StateID) and the index related to the specific information of UL (e.g., uplink-utci-StateID) can also include at least a specific QCL type (e.g., QCL Type D). In this case, the index related to the specific information of DL (e.g., downlink-utci-StateID) can be applied to all QCL types, and the index related to the specific information of UL (e.g., uplink-utci-StateID) can be applied only to a specific QCL type (e.g., QCL Type D).

[0181] The newly specified information on spatial relation between reference RS and target RS (e.g., UnifiedTciState-r17) can also be applied to certain DL and UL channels / RSs. For example, the newly specified information on spatial relation between reference RS and target RS (e.g., UnifiedTciState-r17) can also be applied to all DL and UL channels / RSs. In other words, the UE can also be configured with only the newly specified information on spatial relation between reference RS and target RS (e.g., UnifiedTciState-r17) to replace the existing TCI state and spatial relation. In this case, the UE can also assume that the newly specified information on spatial relation between reference RS and target RS (e.g., UnifiedTciState-r17) is applied to all DL and UL channels / RSs.

[0182] In addition, for example, the newly specified information on spatial relation between reference RS and target RS (e.g., spatialRelationInfo-r17) can be applied to certain DL and UL channels / RSs, and the information on the existing TCI state or spatial relation can be applied to the remaining DL and UL channels / RSs. In this case, the UE can also assume that the newly specified information on spatial relation between reference RS and target RS (e.g., UnifiedTciState-r17) is applied to certain DL and UL channels / RSs, and the information on the existing spatial relation is applied to the remaining DL and UL channels / RSs.

[0183] In addition, for example, the newly specified information on spatial relation between reference RS and target RS (e.g., spatialRelationInfo-r17) can be applied to certain DL and UL channels / RSs, and the information on the existing TCI state or spatial relation can be applied to the remaining DL and UL channels / RSs. In this case, the UE can also assume that the newly specified information on spatial relation between reference RS and target RS (e.g., UnifiedTciState-r17) is applied to certain DL and UL channels / RSs, and the information on the existing spatial relation is applied to the remaining DL and UL channels / RSs.

[0184] Further, for example, the newly specified information on the spatial relation between the reference RS and the target RS (for example, spatialRelationInfo-r17) can also be applied to the resource set for a plurality of DL and UL channels / RSs, and the information on the existing TCI state or spatial relation can be applied to the resource set for the remaining DL and UL channels / RSs. At this time, the UE can also assume that the newly specified information on the spatial relation between the reference RS and the target RS (for example, UnifiedTciState-r17) is applied to the resource set for a plurality of DL and UL channels / RSs, and the information on the existing spatial relation is applied to the resource set for the remaining DL and UL channels / RSs.

[0185] (Wireless communication system)

[0186] Hereinafter, the structure of a wireless communication system according to an embodiment of the present disclosure will be described. In the 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.

[0187] Figure 9 FIG. 1 is a diagram illustrating an example of the schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 can also 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.

[0188] Further, the wireless communication system 1 can also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). The MR-DC can include E-UTRA-NR Dual Connectivity (EN-DC) of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, NR-E-UTRA Dual Connectivity (NE-DC) of NR and LTE, and the like.

[0189] In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Secondary Node (SN). In NE-DC, a base station (gNB) of NR is a MN, and a base station (eNB) of LTE (E-UTRA) is a SN.

[0190] The wireless communication system 1 can also support dual connectivity between a plurality of base stations within the same RAT (for example, both the MN and the SN are base stations (gNB) of NR (NR-NR Dual Connectivity (NN-DC)).

[0191] The wireless communication system 1 can also have a base station 11 that forms a macro cell C1 with a wide coverage, and a base station 12 (12a-12c) that is configured within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 can also be located within at least one cell. The configuration, number, and the like of the cells and the user terminal 20 are not limited to the manner shown in the drawing. Hereinafter, the base stations 11 and 12 are collectively referred to as base stations 10 without distinction.

[0192] The user terminal 20 can also be connected to at least one of a plurality of base stations 10. The user terminal 20 can also use at least one of carrier aggregation (CA) using a plurality of component carriers (CCs) and dual connectivity (DC).

[0193] Each CC can 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 can be included in the FR1, and the small cell C2 can be included in the FR2. For example, the FR1 can be a frequency band of 6 GHz or less (sub-6 GHz), and the FR2 can be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, and the like of the FR1 and the FR2 are not limited thereto, and for example, the FR1 can correspond to a frequency band higher than the FR2.

[0194] Furthermore, the user terminal 20 can use at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC to perform communication.

[0195] The plurality of base stations 10 can also be connected through wired (for example, optical fiber based on Common Public Radio Interface (CPRI), X2 interface, or the like) or wireless (for example, NR communication). For example, in a case where NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 equivalent to an upper station can also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station can also be referred to as an IAB node.

[0196] The base station 10 can also be connected to the core network 30 via another base station 10 or directly. The core network 30 can also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), or the like.

[0197] The user terminal 20 can also be a terminal that supports at least one of LTE, LTE-A, 5G, or the like.

[0198] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. For example, in at least one of Downlink (DL) and Uplink (UL), 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 can also be utilized.

[0199] The wireless access scheme can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access schemes (for example, other single carrier transmission schemes, other multicarrier transmission schemes) can also be applied to the wireless access schemes in UL and DL.

[0200] As a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared among the user terminals 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and the like can also be used in the wireless communication system 1.

[0201] Further, as an uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), and the like can also be used in the wireless communication system 1.

[0202] User data, higher layer control information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, and the like can also be transmitted through the PUSCH. Further, a Master Information Block (MIB) can also be transmitted through the PBCH.

[0203] Lower layer control information can also be transmitted through the PDCCH. The lower layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0204] In addition, the DCI that schedules the PDSCH can also be referred to as a DL assignment, a DL DCI, or the like, and the DCI that schedules the PUSCH can also be referred to as an UL grant, an UL DCI, or the like. In addition, the PDSCH can also be interpreted as DL data, and the PUSCH can also be interpreted as UL data.

[0205] In the detection of the PDCCH, a control resource set (CORESET) and a search space can also be utilized. The CORESET corresponds to a resource in which the DCI is searched for. The search space corresponds to a search area of the PDCCH candidate and a search method. One CORESET can also be associated with one or a plurality of search spaces. The UE can also monitor the CORESET associated with a certain search space based on a search space setting.

[0206] One search space can also correspond to the PDCCH candidate that matches one or a plurality of aggregation levels. One or a plurality of search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", and the like of the present disclosure can also be replaced with each other.

[0207] The uplink control information (UCI) including at least one of the channel state information (CSI), the delivery confirmation information (for example, also referred to as a hybrid automatic repeat request acknowledgement (HARQ-ACK), ACK / NACK, and the like), and the scheduling request (SR) can also be transmitted through the PUCCH. The random access preamble for establishing a connection with the cell can also be transmitted through the PRACH.

[0208] In addition, in the present disclosure, the downlink, the uplink, and the like can also be expressed without the "link". Furthermore, it can also be expressed without the "physical" at the beginning of various channels.

[0209] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like can also 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)), and the like can also be transmitted.

[0210] The synchronization signal can 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 containing the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), or the like. In addition, the SS, the SSB, and the like can also be referred to as a reference signal.

[0211] Furthermore, as an uplink reference signal (Uplink Reference Signal (UL-RS)), in the wireless communication system 1, a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), and the like can also be transmitted. In addition, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0212] (Base station)

[0213] Figure 10 is a drawing showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. Note that one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 can be provided.

[0214] Note that, in this example, functional blocks mainly showing characteristic parts of the embodiment are shown, and it is also conceivable that the base station 10 has other functional blocks required for wireless communication. Part of the processing of each unit described below can also be omitted.

[0215] The control unit 110 performs control of the entire base station 10. The control unit 110 can be configured by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0216] The control unit 110 can also control generation of a signal, scheduling (for example, resource allocation, mapping), and the like. The control unit 110 can also control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward them to the transmission / reception unit 120. The control unit 110 can also perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of wireless resources, and the like.

[0217] The transmission / reception unit 120 can include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 can include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be configured by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0218] The transmission / reception unit 120 can be configured as an integrated transmission / reception unit, or can be configured by a transmission unit and a reception unit. The transmission unit can be configured by the transmission processing unit 1211 and the RF unit 122. The reception unit can be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0219] The transmission / reception antenna 130 can be constituted by an antenna such as an array antenna, which can be explained based on common knowledge in the technical field to which the present disclosure pertains.

[0220] The transmission / reception unit 120 can also transmit the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 120 can also receive the uplink channel, the uplink reference signal, and the like described above.

[0221] The transmission / reception unit 120 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0222] The transmission / reception unit 120 (transmission processing unit 1211) can also generate a bit string to be transmitted, for example, by performing processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (for example, RLC retransmission control), processing of a Medium Access Control (MAC) layer (for example, HARQ retransmission control), and the like, with respect to data, control information, and the like acquired from the control unit 110.

[0223] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing of channel coding (which can include error correction coding), modulation, mapping, filter processing (filter processing), Discrete Fourier Transform (DFT) processing (as necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-analog conversion, and the like, with respect to the bit string to be transmitted, and output a baseband signal.

[0224] The transmission / reception unit 120 (RF unit 122) can also perform modulation to a wireless band, filter processing, amplification, and the like, with respect to the baseband signal, and transmit a signal of the wireless band via the transmission / reception antenna 130.

[0225] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing, demodulation to a baseband signal, and the like, with respect to a signal of the wireless band received by the transmission / reception antenna 130.

[0226] The transmission / reception unit 120 (reception processing unit 1212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as necessary), filtering processing, demapping, demodulation, decoding (which can also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, to acquire user data and the like.

[0227] The transmission / reception unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, and the like, based on the received signal. The measurement unit 123 can also perform measurements with respect to received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like. The measurement results can also be output to the control unit 110.

[0228] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, and the like, and can also acquire, transmit, and the like, user data (user plane data), control plane data, and the like, for the user terminal 20.

[0229] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure can also be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0230] The transmission / reception unit 120 can also transmit information indicating a spatial relation between a reference reference signal (RS) and a target RS of an uplink (UL) for a transmission configuration indication (TCI) state of the UL. The transmission / reception unit 120 can also receive an UL channel to which the TCI state is applied and the target RS of the UL based on the information (Embodiment 1).

[0231] The transmission / reception unit 120 can also transmit information indicating a spatial relation between a reference reference signal (RS) and a target RS of an uplink (UL) and a downlink (DL) for a transmission configuration indication (TCI) state of the UL and the DL. The control unit 110 can also control reception of an UL channel to which the TCI state is applied and transmission of a DL channel (Embodiment 2).

[0232] (User terminal)

[0233] Figure 11 is a diagram indicating an example of a structure of a user terminal according to an embodiment. The user terminal 20 is provided with a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 can be provided.

[0234] In addition, in this example, mainly functional blocks of characteristic parts in the present embodiment are shown, and the user terminal 20 can also be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below can also be omitted.

[0235] The control unit 210 implements control of the entire user terminal 20. The control unit 210 can be constituted by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0236] The control unit 210 can also control generation, mapping, and the like of a signal. The control unit 210 can also control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward to the transmission / reception unit 220.

[0237] The transmission / reception unit 220 can also include a baseband unit 221, an RF unit 222, a measurement unit 223. The baseband unit 221 can also include a transmission processing unit 2211, a reception processing unit 2212. The transmission / reception unit 220 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0238] The transmission / reception unit 220 can be configured as an integrated transmission / reception unit, or can be configured of a transmission unit and a reception unit. The transmission unit can be configured of the transmission processing unit 2211, the RF unit 222. The reception unit can be configured of the reception processing unit 2212, the RF unit 222, the measurement unit 223.

[0239] The transmission / reception antenna 230 can be configured of an antenna such as an array antenna, which can be explained based on common knowledge in the technical field to which the present disclosure pertains.

[0240] The transmission / reception unit 220 can also receive the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 220 can also transmit the uplink channel, the uplink reference signal, and the like described above.

[0241] The transmission / reception unit 220 can also use digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like, to form at least one of a transmission beam and a reception beam.

[0242] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), and the like, on data, control information, and the like acquired from the control unit 210, to generate a bit string to be transmitted.

[0243] The transmission / reception unit 220 (transmission processing unit 2211) can also perform channel coding (which can include error correction coding), modulation, mapping, filtering processing, DFT processing (as necessary), IFFT processing, precoding, digital-analog conversion, and the like, on the bit string to be transmitted, to output a baseband signal.

[0244] In addition, whether or not to apply DFT processing can also be based on the setting of transform precoding. For a certain channel (for example, PUSCH), in a case where transform precoding is activated (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can perform DFT processing as the above-described transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and in a case where this is not so, the transmission / reception unit 220 (transmission processing unit 2211) can not perform DFT processing as the above-described transmission processing.

[0245] The transmission / reception unit 220 (RF unit 222) can also perform modulation to a radio frequency band, filtering processing, amplification, and the like, on the baseband signal, to transmit a signal of the radio frequency band via the transmission / reception antenna 230.

[0246] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filtering processing, demodulation to a baseband signal, and the like with respect to a signal of a wireless band received through the transmission / reception antenna 230.

[0247] The transmission / reception unit 220 (reception processing unit 2212) can also apply reception processing such as analog-digital conversion, FFT processing, IDFT processing (as necessary), filtering processing, demapping, demodulation, decoding (may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like with respect to the acquired baseband signal, and acquire user data and the like.

[0248] The transmission / reception unit 220 (measurement unit 223) can also perform measurement related to a received signal. For example, the measurement unit 223 can also perform RRM measurement, CSI measurement, and the like based on the received signal. The measurement unit 223 can also perform measurement with respect to reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 210.

[0249] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0250] The transmission / reception unit 220 can also receive information indicating a spatial relation between a reference signal (RS) and a target RS of an uplink (UL) from a transmission configuration indication (TCI) state. The control unit 210 can also control so that the TCI state is applied to an UL channel and the target RS of the UL based on the information (Embodiment 1).

[0251] The control unit 210 can also control so that the TCI state is commonly applied to a plurality of the UL channels and the target RS of the UL based on the information (Embodiment 1).

[0252] The control unit 210 can also control so that the TCI state is independently applied for each of a plurality of the UL channels and the target RS of the UL based on the information (Embodiment 1).

[0253] The transmission / reception unit 220 can also receive information indicating a spatial relation between a reference signal (RS) and a target RS from a transmission configuration indication (TCI) state for an uplink (UL) and a downlink (DL). The control unit 210 can also control so that the TCI state is applied to an UL channel and the target RS based on the information (Embodiment 2).

[0254] The control unit 210 can also control based on the information to cause the TCI state to be applied commonly to multiple of the UL channels and the target RS (Embodiment 2).

[0255] The control unit 210 can also control based on the information to cause the TCI state to be applied independently per each of the multiple UL channels and the target RS (Embodiment 2).

[0256] The control unit 210 can also control so that a specific quasi co-location type is applied in the index related to the TCI state for UL and the index related to the TCI state for DL (Embodiment 2).

[0257] (Hardware structure)

[0258] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are realized by any combination of hardware and software of at least one of them. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized by one device which is physically or logically integrated, or by a plurality of devices which are physically or logically separated and connected directly or indirectly (for example, by wire, wireless, or the like). Each functional block can also be realized by combining the above one device or the above plurality of devices with software.

[0259] Here, in the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) which realizes a transmission function can also be referred to as a transmitting unit, a transmitter, or the like. Any one of them is as described above, and the method of realization is not particularly limited.

[0260] For example, the base station, the user terminal, and the like in one embodiment of the present disclosure can also function as a computer which performs the processing of the wireless communication method of the present disclosure. Figure 12 is a diagram showing an example of a hardware structure of a base station and a user terminal involved in one embodiment. The above-described base station 10 and user terminal 20 can also 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, and the like.

[0261] In addition, in the present disclosure, the terms of device, circuit, apparatus, section, unit, and the like can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device shown in the diagram, or can be configured not to include a part of the devices.

[0262] For example, the processor 1001 is illustrated as one, but there can be a plurality of processors. Furthermore, the processing can be executed by one processor, or can be executed by two or more processors simultaneously, sequentially, or with other methods. In addition, the processor 1001 can be realized by one or more chips.

[0263] As for each function in the base station 10 and the user terminal 20, at least one of the operation and the control of the communication via the communication device 1004, or the readout and the writing of the data in the memory 1002 and the storage 1003, is realized by the processor 1001, for example, by reading a specific software (program) into the hardware such as the processor 1001 and the memory 1002, and performing the operation and the control.

[0264] The processor 1001 causes, for example, an operating system to operate to control the entire computer. The processor 1001 can also be configured by a central processing device (Central Processing Unit (CPU)) including an interface with a peripheral device, 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), the transmission and reception unit 120 (220), and the like can also be realized by the processor 1001.

[0265] Furthermore, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processing according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) can also be realized by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be applied to other functional blocks.

[0266] The memory 1002 can also be a computer-readable recording medium such as at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), other appropriate storage medium. The memory 1002 can also be referred to as a register, a cache, a main memory, and the like. The memory 1002 can store programs (program codes), software modules, and the like, which are executable to implement the wireless communication method according to one embodiment of the present disclosure.

[0267] The storage 1003 can also be a computer-readable recording medium such as at least one of a flexible disc, a Floppy (registered trademark) disc, a magneto-optical disc (e.g., a Compact Disc (Compact Disc ROM (CD-ROM) or the like), a Digital Versatile Disc, a Blu-ray (Blu-ray) disc (registered trademark), a removable disc, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, other appropriate storage medium. The storage 1003 can also be referred to as an auxiliary storage device.

[0268] The communication device 1004 is hardware (transmission-reception device) such as a network device, a network controller, a network card, a communication module, and the like, for performing communication between computers via at least one of a wired network and a wireless network. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The transmission-reception unit 120 (220), the transmission-reception antenna 130 (230), and the like described above can also be implemented by the communication device 1004. The transmission-reception unit 120 (220) can also be installed physically or logically separately by a transmission unit 120a (220a) and a reception unit 120b (220b).

[0269] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives an input from an outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, or the like) that performs an output to the outside. In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (e.g., a touch panel).

[0270] Further, the processor 1001, the memory 1002, and the like are connected through a bus 1007 for communicating information. The bus 1007 can be constituted of a single bus, or can be constituted of different buses among the devices.

[0271] Further, the base station 10 and the user terminal 20 can also be constituted of a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), or the like, and a part or all of the functional blocks can also be implemented by hardware. For example, the processor 1001 can also be implemented by at least one of these hardware.

[0272] (Modified example)

[0273] In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (a signal or signaling) can also be replaced with each other. Further, a signal can also be a message. A Reference Signal (RS) can also be simply referred to as RS, and can also be referred to as a Pilot, a Pilot signal, or the like, depending on the applied standards. Further, a Component Carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

[0274] A radio frame can also be constituted of one or a plurality of periods (frames) in the time domain. Each period (frame) of the one or a plurality of periods (frames) that constitute the radio frame can also be referred to as a subframe. Further, a subframe can also be constituted of one or a plurality of slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of numerology.

[0275] Here, the numerology can also refer to communication parameters applied in at least one of transmission and reception of a certain signal or channel. For example, the numerology can also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), a number of symbols per TTI, a radio frame structure, a specific filtering processing performed by a transmitter-receiver in a frequency domain, a specific windowing processing performed by the transmitter-receiver in a time domain, and the like.

[0276] A slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, and the like) in a time domain. Also, a slot can be a time unit based on numerology.

[0277] A slot can also include a plurality of mini-slots. Each mini-slot can also be composed of one or more symbols in a time domain. Also, a mini-slot can be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (PUSCH) mapping type B.

[0278] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also use other names corresponding to each. Also, the time units of frame, subframe, slot, mini-slot, symbol, and the like in the disclosure can be replaced with each other.

[0279] For example, one subframe can also be referred to as a TTI, a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. Also, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0280] Here, the TTI refers to, for example, a minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling in which radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) are allocated to each user terminal in TTI units. Note that the definition of the TTI is not limited to this.

[0281] The TTI can also be a transmission time unit of a data packet (transport block), a code block, a code word, or the like that has been subjected to channel coding, and can also be a processing unit of scheduling, link adaptation, or the like. Note that when the TTI is given, the time interval (for example, the number of symbols) to which a transport block, a code block, a code word, or the like is actually mapped can also be shorter than the TTI.

[0282] Note that in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (that is, one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. Furthermore, the number of slots (the number of mini-slots) that constitute the minimum time unit of scheduling can also be controlled.

[0283] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, or the like. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, or the like.

[0284] Note that the long TTI (for example, the normal TTI, the subframe, or the like) can also be interpreted as a TTI having a time length exceeding 1 ms, and the short TTI (for example, the shortened TTI, or the like) can also be interpreted as a TTI having a TTI length shorter than the long TTI and a TTI length of 1 ms or more.

[0285] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and can also include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers included in the RB can also be the same regardless of the numerology, and can also be 12, for example. The number of subcarriers included in the RB can also be determined based on the numerology.

[0286] Furthermore, the RB can also include one or a plurality of symbols in the time domain, and can also be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, or the like can also be constituted by one or a plurality of resource blocks, respectively.

[0287] In addition, one or a plurality of RBs can also be referred to as a physical RB (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, or the like.

[0288] In addition, a resource block can also be composed of one or a plurality of resource elements (Resource Element (RE)). For example, one RE can also be a wireless resource area of one sub-carrier and one symbol.

[0289] A bandwidth part (Bandwidth Part (BWP)) (may also be referred to as a partial bandwidth, etc.) can also represent a subset of contiguous common RBs (common resource blocks) for a certain numerology in a certain carrier. Here, the common RBs can be determined by the index of the RBs with reference to a common reference point of the carrier. The PRB can also be defined in a certain BWP and additionally numbered within the BWP.

[0290] The UL BWP (BWP for UL) and the DL BWP (BWP for DL) can also be included in the BWP. For the UE, one or a plurality of BWPs can also be configured within one carrier.

[0291] At least one of the configured BWPs can also be activated, and the UE can not be assumed to transmit and receive a specific signal / channel outside the activated BWP. In addition, "cell", "carrier", and the like in the present disclosure can also be interpreted as "BWP".

[0292] In addition, the above-described wireless frame, subframe, slot, mini-slot, and symbol structures are merely examples. For example, the number of subframes included in the wireless frame, the number of slots per subframe or wireless frame, the number of mini-slots included in the slot, the number of symbols and RBs included in the slot or mini-slot, the number of subcarriers included in the RB, and the number of symbols, symbol length, cyclic prefix (Cyclic Prefix (CP)) length, and the like within the TTI can be variously changed.

[0293] In addition, the information, parameters, and the like described in the present disclosure can be represented by an absolute value, a relative value with respect to a specific value, or a corresponding other information. For example, a wireless resource can also be indicated by a specific index.

[0294] In the present disclosure, names used for parameters and the like are not names in all respects that are limiting. Furthermore, mathematical expressions and the like using these parameters can also be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, and the like) and information elements can be identified by any appropriate names, and thus various names assigned to these various channels and information elements are not names in all respects that are limiting.

[0295] Information, signals, and the like described in the present disclosure can also be represented by any of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0296] Furthermore, information, signals, and the like can be outputted in at least one direction, from a higher layer to a lower layer, and from a lower layer to a higher layer. Information, signals, and the like can also be inputted / outputted via a plurality of network nodes.

[0297] Information, signals, and the like inputted / outputted can be stored in a specific location (e.g., a memory) and can be managed using a management table. Information, signals, and the like inputted / outputted can be overwritten, updated, or appended. Information, signals, and the like outputted can be deleted. Information, signals, and the like inputted can be transmitted to other devices.

[0298] Notification of information is not limited to the manners / embodiments described in the present disclosure, and can be performed using other methods. For example, notification of information in the present disclosure can also be implemented by physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), and the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0299] In addition, the physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Furthermore, the RRC signaling can also be referred to as an RRC message, for example, can also be an RRC connection setup message, an RRC connection reconfiguration message, and the like. Furthermore, the MAC signaling can also be notified using a MAC control element (CE), for example.

[0300] Furthermore, the notification of the specific information (for example, the notification of "X is") is not limited to the explicit notification, but can also be performed implicitly (for example, by not performing the notification of the specific information, or by the notification of other information).

[0301] The determination can be performed by a value represented by one bit (0 or 1), can also be performed by a true or false value (Boolean value) represented by true or false, and can also be performed by a comparison of numerical values (for example, a comparison with a specific value).

[0302] Software, regardless of being referred to as software, firmware, middle-ware, microcode, hardware description language, or by other names, should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, and the like.

[0303] Moreover, software, instructions, information, etc. can also be transmitted as desired as a carrier wave. For example, in the case where software is transmitted from a website, a server, or other remote source using at least one of wired technologies (coaxial cables, optical fiber cables, twisted pair cables, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared rays, microwaves, etc.), at least one of these wired technologies and wireless technologies is included in the definition of the transmission medium.

[0304] The terms "system" and "network" used in the present disclosure can be used interchangeably. The "network" can also mean a device (e.g., a base station) included in the network.

[0305] In the present disclosure, the terms "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.

[0306] In the present disclosure, the terms "Base Station (BS)", "wireless 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. There is also a case where the base station is called with the terms macro cell, small cell, femto cell, pico cell, etc.

[0307] A base station can accommodate one or plural (for example, three) cells. In a case where a base station accommodates plural cells, the coverage area of the base station as a whole can be divided into plural smaller areas, each of which can also be provided with a communication service by a base station subsystem (for example, a small-sized base station (Remote Radio Head (RRH)) for indoor use). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of a base station and a base station subsystem that provides a communication service in the coverage.

[0308] In the present disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", and the like are used interchangeably.

[0309] In some cases, a mobile station is also called a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or several other proper terms.

[0310] At least one of a base station and a mobile station can also be called a transmission device, a reception device, a wireless communication device, and the like. In addition, at least one of a base station and a mobile station can also be a device mounted on a moving body, a moving body itself, and the like. The moving body can be a vehicle (for example, a car, an airplane, and the like), can also be a moving body that moves in an unmanned manner (for example, a drone, an automated driving vehicle, and the like), and can also be a robot (manned or unmanned). In addition, at least one of a base station and a mobile station also includes a device that does not necessarily move while performing a communication operation. For example, at least one of a base station and a mobile station can also be a sensor or the like Internet of Things (IoT) device.

[0311] Furthermore, the base station in the present disclosure can also be interpreted as a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, also referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), and the like), each of the modes / embodiments of the present disclosure can also be applied. In this case, a structure in which the user terminal 20 has the functions of the base station 10 described above can also be provided. Furthermore, the expressions "uplink" and "downlink" and the like can also be interpreted as expressions corresponding to inter-terminal communication (for example, "side"). For example, the uplink channel, the downlink channel, and the like can also be interpreted as side channels.

[0312] Likewise, the user terminal in the present disclosure can also be interpreted as a base station. In this case, a structure in which the base station 10 has the functions of the user terminal 20 described above can also be provided.

[0313] In the present disclosure, an action performed by a base station is sometimes also performed by an upper node thereof depending on the situation. Obviously, in a network including one or a plurality of network nodes having a base station, 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, consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited to these), or a combination thereof.

[0314] Each of the modes / embodiments described in the present disclosure can be used individually, can be used in combination, and can also be used in switching as execution proceeds. Furthermore, the processing procedures, sequences, flowcharts, and the like of each of the modes / embodiments described in the present disclosure can also be changed in order as long as there is no contradiction. For example, for the method described in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0315] The modes / embodiments explained in the present disclosure can also be applied to 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), 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), systems using other appropriate wireless communication methods, next-generation systems extended based on them, and the like. In addition, a plurality of systems can also be combined (for example, LTE or LTE-A, in combination with 5G, and the like) to be applied.

[0316] The description "based on" used in the present disclosure does not mean "only based on" unless specifically written. In other words, the description "based on" means both "only based on" and "at least based on".

[0317] Any reference to elements using the call "first", "second", and the like used in the present disclosure does not completely limit the quantity or order of the elements. The call can be used in the present disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to the first and second elements does not mean that only two elements can be used, or that the first element must be prior to the second element in some form.

[0318] The term "determining" as used in the disclosure encompasses a wide variety of actions. For example, "determining" can include "deciding", "calculating", "computing", "processing", "deriving", "investigating", "looking up" (e.g., looking up in a table, a database or another data structure), "ascertaining" and the like.

[0319] Also, "determining" can also include "receiving", "transmitting", "inputting", "outputting", "accessing" (e.g., accessing data in a memory) and the like.

[0320] Further, "determining" can also include "resolving", "selecting", "choosing", "establishing", "comparing" and the like. That is, "determining" can also include "determining" to take some action.

[0321] Further, "determining" can also be construed as "assuming", "expecting", "considering" and the like.

[0322] The terms "connected", "coupled", or any variant thereof, as used in the disclosure, indicate all types of connecting or coupling, whether direct and / or indirect, that enable the elements to be "connected" or "coupled" together. The connection or coupling can be physical, logical, or a combination of these. For example, "connected" can be construed as "accessed" or "accessing".

[0323] In the present disclosure, in the case of connecting two elements, it can be considered that one or more electric wires, cables, printed electric connections, and the like are used, and electromagnetic energy having a wavelength in the wireless frequency domain, the microwave region, the light (both visible and non-visible) region, and the like is used as several non-limiting and non-inclusive examples to be "connected" or "combined" with each other.

[0324] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separate", "combine", and the like can also be interpreted as "different" in the same way.

[0325] In the present disclosure, in the case of using "include", "including", and variations thereof, these terms mean the same as the term "comprising" in an inclusive sense. Further, the term "or" used in the present disclosure does not mean the exclusive sense.

[0326] In the present disclosure, for example, in the case of adding an article to a noun after translation, such as a, an, and the in English, the present disclosure can also include the case where the noun after the article is plural.

[0327] The above has been described in detail with respect to the invention related to the present disclosure, but the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure for those skilled in the art. The invention related to the present disclosure can be implemented as a modification and a change without departing from the spirit and scope of the invention determined based on the recitations of the claims. Therefore, the recitations of the present disclosure are for the purpose of illustrative explanation, and do not have any limiting meaning on the invention related to the present disclosure.

Claims

1. A terminal having: a reception unit that receives information about a transmission configuration indication (TCI) state common to an uplink (UL) and a downlink (DL); and a control unit that controls to apply the TCI state common to the UL and the DL to a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a channel state information reference signal (CSI-RS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), and a sounding reference signal (SRS) in a case where the information about the TCI state common to the UL and the DL is activated by radio resource control (RRC) signaling and a medium access control (MAC) control element (CE).

2. A wireless communication method of a terminal having: a step of receiving information about a transmission configuration indication (TCI) state common to an uplink (UL) and a downlink (DL); and a step of controlling to apply the TCI state common to the UL and the DL to a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a channel state information reference signal (CSI-RS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), and a sounding reference signal (SRS) in a case where the information about the TCI state common to the UL and the DL is activated by radio resource control (RRC) signaling and a medium access control (MAC) control element (CE).

3. A base station having: a transmission unit that transmits information about a transmission configuration indication (TCI) state common to an uplink (UL) and a downlink (DL); and a control unit that controls to apply the TCI state common to the UL and the DL to a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a channel state information reference signal (CSI-RS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), and a sounding reference signal (SRS) in a case where the information about the TCI state common to the UL and the DL is activated by radio resource control (RRC) signaling and a medium access control (MAC) control element (CE).

4. A system having a terminal and a base station, in which, the terminal has: a reception unit that receives information about a transmission configuration indication (TCI) state common to an uplink (UL) and a downlink (DL); and the base station has: a transmission unit that transmits the information about the TCI state common to the UL and the DL; and a control unit that controls to apply the TCI state common to the UL and the DL to a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a channel state information reference signal (CSI-RS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), and a sounding reference signal (SRS) in a case where the information about the TCI state common to the UL and the DL is activated by radio resource control (RRC) signaling and a medium access control (MAC) control element (CE). ​ ​ ​ ​ ​ ​ ​ ​ ​ a control unit that, in a case where information about a TCI state common to UL and DL is activated by radio resource control (RRC) signaling and a medium access control (MAC) control element (CE) for a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a channel state information reference signal (CSI-RS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), and a sounding reference signal (SRS), controls to apply the TCI state common to UL and DL to the PDCCH, the PDSCH, the CSI-RS, the PUCCH, the PUSCH, and the SRS, the base station has: a transmission unit that transmits the information.

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