Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit configured to determine a default spatial relationship to be applied to multi-slot transmission based on a spatial relationship applied to one or more time slots of the multi-slot transmission; and a transmission unit configured to implement the multi-slot transmission using a spatial domain transmission filter based on the default spatial relationship. According to one embodiment of the present disclosure, multi-slot transmission / reception can be appropriately controlled.

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 Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Release (Rel.) 8 and 9) within the Third Generation Partnership Project (3GPP).

[0003] Successor systems to LTE (e.g., also known as the fifth generation mobile communication system (5G), 5G+ (plus), the sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In 3GPP Rel.15 / 16 NR, support for repeated transmission across multiple time slots (multi-slot) is being studied. For example, base stations (network (NW), gNB) can also repeatedly perform DL transmissions. User terminals (user equipment (UE)) can also repeatedly perform UL transmissions.

[0009] In addition, in NR, when the spatial relationship cannot be used for UL transmission, a default spatial relationship is being studied as the spatial relationship used by the UE. The default spatial relationship can also be derived by referring to a specific spatial relationship, the Transmission Configuration Indication state (TCI state), etc.

[0010] Regarding multi-slot transmission, the TCI status of the reference destination for the default spatial relationship may change during transmission. However, research has not yet progressed on which default spatial relationship to apply to repeated transmission. Without this clarity, repeated transmission cannot be properly performed. If repeated transmission cannot be properly performed, there is a concern that throughput may be reduced or communication quality may deteriorate.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling multi-slot transmission / reception.

[0012] Means for solving problems

[0013] A terminal involved in one embodiment of the present invention comprises: a control unit that determines a default spatial relationship applied in a multi-slot transmission based on a spatial relationship applied in one or more time slots of the multi-slot transmission; and a transmitting unit that implements the multi-slot transmission using a spatial domain transmitting filter based on the default spatial relationship.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, multi-slot transmission / reception can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figures 1A to 1C This is a diagram showing an example of a default spatial relationship of multiple time slots according to one embodiment.

[0017] Figure 2 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0018] Figure 3 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0019] Figure 4 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0020] Figure 5 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. DETAILED DESCRIPTION

[0021] (TCI, spatial relationship, QCL)

[0022] In NR, research is underway to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) of a signal and at least one of a channel (expressed as signal / channel) in the UE based on the transmission configuration indication state (TCI state).

[0023] The TCI state may also represent the TCI state applied to the downlink signal / channel. The TCI state applied to the uplink signal / channel may also be expressed as a spatial relation.

[0024] The TCI status refers to information related to Quasi-Co-Location (QCL) of signals / channels, and may also be referred to as spatial reception parameters, spatial relation information, etc. The TCI status may be set for each channel or each signal for the UE.

[0025] QCL refers to an indicator that indicates the statistical properties of a signal / channel. For example, if a signal / channel is in a QCL relationship with other signals / channels, it can also mean that it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) is the same among these different signals / channels (at least one of these is QCL).

[0026] In addition, the spatial reception parameter may correspond to the UE's receive beam (e.g., receive simulated beam) or may be determined based on spatial QCL. The QCL (or at least one element of QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0027] Multiple types (QCL types) of QCLs may be specified. For example, four QCL types, namely types A to D, may be provided. Parameters (or parameter sets) that can be assumed to be the same in these four QCL types A to D are different.

[0028] The UE assumes that a certain Control Resource Set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals, which may also be referred to as QCL assumption.

[0029] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI status or QCL assumption of the signal / channel.

[0030] The TCI status may be, for example, information related to the QCL of the target channel (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RSs). The TCI status may also be set (indicated) through high-layer signaling, physical layer signaling, or a combination thereof.

[0031] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0032] MAC signaling may also use, for example, MAC Control Element (MAC CE) and MAC Protocol Data Unit (MAC PDU). Broadcast information may also include, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and Other System Information (OSI).

[0033] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0034] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0035] In addition, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

[0036] The SSB is a signal block that includes at least one of the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the physical broadcast channel (PBCH). The SSB may also be referred to as an SS / PBCH block.

[0037] The TCI state information element (RRC's "TCI-state IE") set through high-layer signaling may also include a TCI state ID and one or more QCL information ("QCL-Info"). The QCL information may also include at least one of information related to the RS that forms a QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may also include information such as the RS index (for example, SSB index, non-zero-power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (identifier)), the index of the cell where the RS is located, and the index of the bandwidth part (Bandwidth Part (BWP)) where the RS is located.

[0038] <TCI status for PDSCH>

[0039] The information related to the QCL between the PDSCH (or the DMRS antenna port associated with the PDSCH) and a certain DL-RS can also be called the TCI state for the PDSCH, etc.

[0040] The UE may also be notified (configured) of M (M ≥ 1) TCI states for PDSCH (QCL information for M PDSCHs) through higher layer signaling. Furthermore, the number M of TCI states configured for the UE may be limited by at least one of the UE capability and the QCL type.

[0041] The DCI used for PDSCH scheduling may also include a field indicating the TCI state for the PDSCH (e.g., a TCI field, a TCI state field, etc.). This DCI may also be used for scheduling the PDSCH of a cell, and may be referred to as, for example, DL DCI, DL allocation, DCI format 1_0, DCI format 1_1, etc.

[0042] Whether the TCI field is included in the DCI can also be controlled by information notified from the base station to the UE. This information can also be information indicating whether the TCI field exists (present or absent) in the DCI (e.g., TCI presence information, TCI presence information within DCI, or the higher-layer parameter TCI-PresentInDCI). This information can also be set to the UE through, for example, higher-layer signaling.

[0043] When more than 8 types of TCI states are set for the UE, a MAC CE may be used to activate (or specify) less than 8 types of TCI states. This MAC CE may also be referred to as a UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE). The value of the TCI field in the DCI may also indicate one of the TCI states activated by the MAC CE.

[0044] When the UE is set with TCI presence information set to "valid (enabled)" for the CORESET for scheduling PDSCH (the CORESET used in the PDCCH transmission for scheduling PDSCH), the UE can also assume that the TCI field exists in the DCI format 1_1 of the PDCCH sent on the CORESET.

[0045] In a case where TCI existence information is not set for the CORESET that schedules the PDSCH, or when the PDSCH is scheduled using DCI format 1_0, when the time offset between the reception of the DL DCI (DCI that schedules the PDSCH) and the reception of the PDSCH corresponding to the DCI is greater than a threshold, in order to determine the QCL of the PDSCH antenna port, the UE may also assume that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied to the CORESET used in the PDCCH transmission that schedules the PDSCH.

[0046] When TCI presence information is set to "enabled", when the TCI field in the DCI within the component carrier (CC) scheduled (for PDSCH) indicates the activated TCI state in the scheduled CC or DL BWP, and the PDSCH is scheduled using DCI format 1_1, the UE may use the TCI according to the value of the TCI field in the PDCCH detected with DCI to determine the QCL of the PDSCH antenna port. When the time offset between the reception of the DL DCI (scheduling the PDSCH) and the PDSCH corresponding to the DCI (the PDSCH scheduled by the DCI) is greater than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell and the RS in the TCI state associated with the QCL type parameter given by the indicated TCI state are QCL.

[0047] In the case where the UE is configured with a single time slot PDSCH, the indicated TCI state may also be based on the activated TCI state in the time slot with the scheduled PDSCH. In the case where the UE is configured with multiple time slot PDSCHs, the indicated TCI state may also be based on the activated TCI state in the initial time slot with the scheduled PDSCH, and the UE may also expect it to be the same across the time slots with the scheduled PDSCH. In the case where the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the UE may also assume that the time offset between the detected PDCCH and the PDSCH corresponding to the PDCCH is greater than the threshold when the TCI presence information is set to "valid" for the CORESET and when at least one of the TCI states configured for the service cell scheduled by the search space set includes QCL type D.

[0048] In RRC connected mode, when TCI information in DCI (higher layer parameter TCI-PresentInDCI) is set to "enabled" and when TCI information in DCI is not set, if the time offset between reception of DL DCI (DCI scheduling PDSCH) and the corresponding PDSCH (PDSCH scheduled by the DCI) is less than a threshold, the UE may assume that the RS associated with the DM-RS port of the PDSCH of the serving cell and the QCL parameter used in the QCL indication of the PDCCH of the CORESET associated with the monitored search space is the QCL, where the CORESET is the CORESET with the smallest (lowest) CORESET-ID in the latest (latest) time slot monitored by the UE among one or more CORESETs within the active BWP of the serving cell. This RS may also be referred to as the default TCI state of the PDSCH or the default QCL assumption of the PDSCH.

[0049] The time offset between the reception of DL DCI and the reception of the PDSCH corresponding to the DCI may also be referred to as a scheduling offset.

[0050] In addition, the above-mentioned threshold can also be referred to as the time length for QCL (time duration), "timeDurationForQCL", "threshold", "threshold for offset between a DCI indicating aTCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0051] The QCL time length may also be based on UE capabilities, for example, based on the delays associated with PDCCH decoding and beam switching. The QCL time length may also be the minimum time required for the UE to receive the PDCCH and apply the spatial QCL information received in the DCI for PDSCH processing. The QCL time length may be expressed as the number of symbols per subcarrier interval or as time (e.g., μs). The information about the QCL time length may be reported from the UE to the base station as UE capability information or may be set to the UE from the base station using higher layer signaling.

[0052] For example, the UE may also assume that the DMRS port of the PDSCH is QCL with the DL-RS, and the DL-RS is a DL-RS in a TCI state activated for the CORESET corresponding to the minimum CORESET-ID. The latest time slot may also be, for example, the time slot for receiving the DCI that schedules the PDSCH.

[0053] Alternatively, the CORESET-ID may be an ID (an ID for identifying the CORESET, controlResourceSetId) set by the RRC information element "ControlResourceSet".

[0054] When no CORESET is configured for a CC, the default TCI state may be the activated TCI state that is applicable in the PDSCH within the activated DL BWP of the CC and has the lowest ID.

[0055] After Rel.16, when the PDSCH and the PDCCH that schedules it are located in different component carriers (CC) (cross-carrier scheduling), if the delay from PDCCH to PDSCH (PDCCH-to-PDSCH delay) is shorter than the time length for QCL, or if there is no TCI state in the DCI used for the scheduling, the UE can also obtain the QCL assumption for the scheduled PDSCH based on the activated TCI state with the lowest ID that can be applied in the PDSCH within the activated BWP of the scheduled cell.

[0056] <Spatial Relationship for PUCCH>

[0057] The UE may also be configured with parameters (PUCCH configuration information, PUCCH-Config) used for PUCCH transmission through higher layer signaling (e.g., Radio Resource Control (RRC) signaling). The PUCCH configuration information may also be configured for each partial band (e.g., uplink bandwidth part (BWP)) within a carrier (also known as a cell or component carrier (CC)).

[0058] The PUCCH configuration information may also include a list of PUCCH resource set information (eg, PUCCH-ResourceSet) and a list of PUCCH spatial relationship information (eg, PUCCH-SpatialRelationInfo).

[0059] The PUCCH resource set information may also include a list (eg, resourceList) of PUCCH resource indices (IDs, eg, PUCCH-ResourceId).

[0060] In addition, when the UE does not have dedicated PUCCH resource configuration information (e.g., dedicated PUCCH resource configuration) provided through PUCCH resource set information within the PUCCH configuration information (before RRC setup), the UE may also determine the 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 may also include 16 PUCCH resources.

[0061] On the other hand, when the UE has the above-mentioned dedicated PUCCH resource setting information (UE-dedicated uplink control channel structure, dedicated PUCCH resource structure) (after RRC setting), the UE can also determine the PUCCH resource set according to the number of UCI information bits.

[0062] The UE may also determine the number of CCEs (N) in the control resource set (CORESET) for receiving the PDCCH carrying the DCI based on the value of a field (e.g., a PUCCH resource indicator field) in the downlink control information (downlink control information (DCI)) (e.g., DCI format 1_0 or 1_1 used in the scheduling of the PDSCH) and the number of CCEs (N) in the control resource set (CORESET) for receiving the PDCCH carrying the DCI. CCE ), and the index of the first (initial) CCE received by the PDCCH (n CCE，0 ) to determine at least one of the PUCCH resource sets (for example, a PUCCH resource set determined to be cell-specific or UE-dedicated) a PUCCH resource (index) within the above-mentioned PUCCH resource set.

[0063] PUCCH spatial relationship information (e.g., the "PUCCH-spatialRelationInfo" of the RRC information element) may also indicate multiple candidate beams (spatial domain filters) for PUCCH transmission. PUCCH spatial relationship information may also indicate the spatial relationship between RS (Reference Signal) and PUCCH.

[0064] The list of PUCCH spatial relationship information may also include several elements (PUCCH spatial relationship information IE (Information Element)). Each PUCCH spatial relationship information may also include, for example, an index of the PUCCH spatial relationship information (ID, e.g., pucch-SpatialRelationInfoId), an index of the serving cell (ID, e.g., servingCellId), and at least one of information related to the RS (reference RS) that has a spatial relationship with the PUCCH.

[0065] For example, the information related to the RS may be an SSB index, a CSI-RS index (e.g., an NZP-CSI-RS resource structure ID), an SRS resource ID, and a BWP ID. The SSB index, CSI-RS index, and SRS resource ID may also be associated with at least one of the beam, resource, and port selected by measuring the corresponding RS.

[0066] When more than one piece of spatial relation information related to PUCCH is set, the UE may also control so that one piece of PUCCH spatial relation information is activated for one PUCCH resource at a certain time based on the PUCCH spatial relation activation / deactivation MAC CE.

[0067] The PUCCH spatial relation activation / deactivation MAC CE of Rel-15 NR is expressed as three octets (Octet, Oct) 1 to 3 (8 bits×3=24 bits).

[0068] The MAC CE may also include information such as the serving cell ID ("Serving Cell ID" field) of the application object, the BWP ID ("BWP ID" field), and the PUCCH resource ID ("PUCCH Resource ID" field).

[0069] In addition, the MAC CE contains "S i ”(i=0-7) field. In a certain S i When the field indicates 1, the UE activates the spatial relationship information of the spatial relationship information ID#i. i When the field indicates 0, the UE deactivates the spatial relationship information of the spatial relationship information ID#i.

[0070] The UE may activate the PUCCH relationship information specified by the MAC CE 3 ms after transmitting a positive acknowledgement (ACK) for the MAC CE for activating the PUCCH spatial relationship information.

[0071] (Spatial relationship between SRS and PUSCH)

[0072] In Rel.15NR, the UE can also receive information (SRS setting information, such as parameters in the "SRS-Config" of the RRC control element) used in the transmission of measurement reference signals (e.g., Sounding Reference Signal (SRS)).

[0073] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, the "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, the "SRS-Resource" of the RRC control element).

[0074] An SRS resource set may also be associated with a specific number of SRS resources (a specific number of SRS resources may also be grouped). Each SRS resource may also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0075] The SRS resource set information may also include the SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, the SRS resource type (for example, any one of periodic SRS (PeriodicSRS), semi-persistent SRS (Semi-Persistent SRS), and aperiodic CSI (Aperiodic SRS)), and information on the usage of the SRS.

[0076] Here, the SRS resource type may also represent any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A-SRS). In addition, the UE may also periodically (or, after activation, periodically) transmit P-SRS and SP-SRS, and transmit A-SRS based on the SRS request in the DCI.

[0077] In addition, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may include, for example, beam management, codebook (CB), non-codebook (NCB), antenna switching, etc. SRS for codebook or non-codebook purposes may also be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.

[0078] For example, in the case of codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0079] SRS resource information can also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, sending comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), jump association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0080] The spatial relationship information of the SRS (e.g., the "spatialRelationInfo" element of the RRC information element) may also indicate the spatial relationship information between a specific reference signal and the SRS. This specific reference signal may also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (CSI-RS), and an SRS (e.g., other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0081] The spatial relationship information of the SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-mentioned specific reference signal.

[0082] In addition, in this disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may be interchangeable. In addition, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may be interchangeable. In addition, the SRS index, SRS resource ID, and SRI may be interchangeable.

[0083] The spatial relationship information of the SRS may also include a serving cell index corresponding to the above-mentioned specific reference signal, a bandwidth part (BWP) index (BWP ID), and the like.

[0084] When spatial relationship information related to SSB or CSI-RS and SRS is set for a certain SRS resource, the UE may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used to receive the SSB or CSI-RS. In this case, the UE may also assume that the UE receive beam for the SSB or CSI-RS is the same as the UE transmit beam for the SRS.

[0085] When spatial relationship information related to another SRS (reference SRS) and the target SRS is set for a specific SRS (target SRS) resource, the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as that used to transmit the reference SRS. In other words, in this case, the UE may assume that the UE transmit beam for the reference SRS is the same as the UE transmit beam for the target SRS.

[0086] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific field (e.g., the SRS Resource Identifier (SRI) field) within the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resources (e.g., the "spatialRelationInfo" of the RRC information element) determined based on the value of the specific field (e.g., SRI) for PUSCH transmission.

[0087] For PUSCH, when codebook-based transmission is used, the UE may have two SRS resources configured for the SRS resource set via RRC, and one of the two SRS resources indicated via DCI (1-bit SRI field). For PUSCH, when non-codebook-based transmission is used, the UE may have four SRS resources configured for the SRS resource set via RRC, and one of the four SRS resources indicated via DCI (2-bit SRI field).

[0088] In NR versions after Rel. 16, research is underway to explicitly notify common beams for both DL and UL. For example, the TCI state is used as (or instead of) spatial relationship information for PUSCH. This TCI state may also correspond to at least one of a downlink TCI state (DL TCI state), an uplink TCI state (UL TCI state), and a unified TCI state.

[0089] In addition, the UL TCI state may be replaced by spatial relation information (spatialrelationinfo). The unified TCI state may also mean a TCI state commonly used in both DL and UL.

[0090] In addition to the SSB index, CSI-RS ID, and SRS ID, a TCI state ID, a control resource set (CORESET) ID, etc. may be set as the index of the reference RS (reference RS) of the spatial relationship. A UE to which a TCI state ID or CORESET ID is set as a spatial relationship may assume that, when performing UL transmission based on this spatial relationship, the same spatial domain filter as that used for DL reception in accordance with the TCI state ID or the TCI state ID corresponding to the CORESET ID is used for this UL transmission.

[0091] (Path loss RS)

[0092] Path loss PL in transmission power control of each of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), uplink control channel (Physical Uplink Control Channel (PUCCH)), and sounding reference signal (Sounding Reference Signal (SRS)) b，f，c (q d ) [dB], using the index q of the reference signal (RS, path loss reference RS) for the downlink BWP associated with the activated UL BWP b of carrier f of serving cell c d And it is calculated by UE.

[0093] In this disclosure, path loss reference RS, path loss (PL)-RS, index q d , RS used in path loss calculation, and RS resources used in path loss calculation can also be used interchangeably. In the present disclosure, calculation, estimation, measurement, and tracking can also be used interchangeably.

[0094] PL-RS may also be at least one of DL RSs such as SSB and CSI-RS.

[0095] To accurately measure path loss for transmit power control, Rel.15 UEs are updated with up to four PL-RSs via RRC signaling. Even when the UL transmit beam (spatial relationship) is updated via MAC CE, the PL-RS cannot be updated via MAC CE.

[0096] Rel.16 UEs are configured with up to 64 PL-RSs via RRC signaling, and one PL-RS is activated via MAC CE. For all UL channels (SRS, PUCCH, and PUSCH), the UE needs to track up to four activated PL-RSs. Tracking PL-RSs also means calculating and storing the path loss based on the PL-RS measurements.

[0097] When the TCI state for the PDCCH or PDSCH is updated through the MAC CE, the PL-RS is also updated to the TCI state.

[0098] (Default spatial relationship and default PL-RS)

[0099] In Rel.15 NR, two MAC CEs are required: one for activating / deactivating the PUCCH spatial relationship and the other for activating / deactivating the SRS spatial relationship. The PUSCH spatial relationship follows the SRS spatial relationship.

[0100] In Rel.16NR, at least one of the MAC CE for activation / deactivation of PUCCH spatial relationship and the MAC CE for activation / deactivation of SRS spatial relationship may not be used.

[0101] When the spatial relationship cannot be utilized for UL transmission (e.g., cannot be determined, is not specified, or is not activated), a default spatial relationship is being studied as the spatial relationship utilized by the UE. Furthermore, when the PL-RS cannot be utilized for UL transmission (same as above) or when the default spatial relationship is utilized, a default PL-RS is being studied as the PL-RS utilized.

[0102] For example, if both the spatial relationship for PUCCH and PL-RS are not configured or activated in FR2, the default assumption of the spatial relationship for PUCCH and PL-RS (default spatial relationship and default PL-RS) is applied. If both the spatial relationship for SRS and PL-RS are not configured or activated in FR2, the default assumption of the spatial relationship for PUSCH and SRS (default spatial relationship and default PL-RS) is applied to PUSCH and SRS scheduled using DCI format 0_1.

[0103] If CORESET is configured in the active DL BWP on the CC, the default spatial relationship and default PL-RS may also follow the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in the active DL BWP. If CORESET is not configured in the active DL BWP on the CC, the default spatial relationship and default PL-RS may also follow the activated TCI state with the lowest TCI state ID of the PDSCH in the active DL BWP.

[0104] In Rel.15, the spatial relationship of PUSCH scheduled using DCI format 0_0 follows the spatial relationship of the PUCCH resource with the smallest PUCCH resource ID among the activated spatial relationships of PUCCH on the same CC. Even if PUCCH is not transmitted on an SCell, the network needs to update the PUCCH spatial relationship on all SCells.

[0105] In Rel. 16, PUCCH configuration is not required for the PUSCH scheduled using DCI format 0_0. For the PUSCH scheduled using DCI format 0_0, the default spatial relationship and the default PL-RS are applied.

[0106] When the TCI state for the PDCCH or PDSCH is updated through the MAC CE, the PL-RS is also updated to the TCI state.

[0107] In addition, the above-mentioned default TCI state / default QCL assumption may also mean a TCI state (QCL assumption) used by the UE when the TCI state for DL reception cannot be used.

[0108] (Repeatedly sent)

[0109] In Rel.15 / 16 NR, support for repeated transmission across multiple time slots (multi-slot) is being studied. For example, a base station (network (NW), gNB) can repeatedly transmit DL data (e.g., downlink shared channel (PDSCH)) a specific number of times. Alternatively, a UE can repeatedly transmit UL data (e.g., uplink shared channel (PUSCH)) a specific number of times.

[0110] In addition, the repetition unit (for example, time slot) may also be called a transmission opportunity (transmission occasion) or the like.

[0111] Furthermore, repeated transmission of the PUCCH over multiple time slots, repeated transmission of the SRS, and the like are also under study.

[0112] In addition, it is preferred that, with respect to PUCCH, PUSCH, PDCCH, PDSCH, etc., when the spatial relationship / TCI state is updated through MACCE, the UE matches the default spatial relationship / TCI state / PL-RS with the updated spatial relationship / TCI state as early as possible.

[0113] However, research has not yet progressed on which default spatial relationship / TCI state / PL-RS to apply for repeated transmission. Without this clarity, repeated transmission cannot be properly performed. If repeated transmission cannot be properly performed, there is a concern that throughput will be reduced or communication quality will deteriorate.

[0114] Therefore, the inventors of the present invention have devised a method for appropriately determining the spatial relationship / TCI status / PL-RS for repeated transmission. According to one embodiment of the present disclosure, for example, the UE can appropriately switch the default spatial relationship based on the update of the TCI status based on the MAC CE.

[0115] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the various embodiments may be applied individually or in combination.

[0116] In addition, in the present disclosure, “A / B” may also mean “at least one of A and B”.

[0117] In the present disclosure, panel, uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, specific antenna port (e.g., DeModulation Reference Signal (DMRS)) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., Code Division Multiplexing (CDM)) group, specific reference signal group, CORESET group), CORESET pool, etc. can also be replaced with each other. In addition, TRP identifier (TRP Identifier (ID)) and TRP can also be replaced with each other.

[0118] In addition, the CORESET in the following embodiments may mean a CORESET associated with a certain BWP or a CORESET associated with a certain cell (an arbitrary BWP).

[0119] In this disclosure, the terms index, ID, indicator, and resource ID are interchangeable. The terms beam, TCI, TCI state, DL TCI state, UL TCI state, unified TCI state, QCL, QCL assumption, spatial relationship, spatial relationship information, SRI, SRS resource, and precoder are interchangeable. Furthermore, TCI state ID#i (where i is an integer) may be expressed as TCI#i.

[0120] In the present disclosure, lists, groups, sets, subsets, clusters, etc. may also be used interchangeably.

[0121] Hereinafter, in the present disclosure, the default spatial relationship, the default spatial relationship for PUSCH / PUCCH / SRS for repeated transmission, the default spatial relationship only for repeated transmission, etc. may also be replaced with each other.

[0122] In the present disclosure, repeated transmission, multi-slot (multi-slot transmission), and multiple sub-slot (multi-sub-slot transmission) may be used interchangeably. Furthermore, multi-slot transmission may refer to UL transmission of the same UCI / TB / CW / data / RS (e.g., PUCCH / PUSCH / SRS), or multiple UL transmissions triggered by a single DCI / MAC.

[0123] In addition, the spatial relationship (or default spatial relationship) and PL-RS (or default PL-RS) disclosed in this disclosure can also be interchanged. That is, in the following embodiments, the determination of the spatial relationship for repeated transmission is mainly described, but the present disclosure also supports the determination of the PL-RS for repeated transmission (for example, repeated transmission of PUCCH / PUSCH / SRS).

[0124] (Wireless Communication Method)

[0125] In one embodiment, the UE may also determine the spatial relationship of each time slot according to at least one of the following regarding the default spatial relationship of multi-slot transmission:

[0126] (1) applying the spatial relationship of the first time slot of the multi-time slot to all time slots of the multi-time slot;

[0127] (2) The spatial relationship of each time slot in the multi-time slot is determined individually in each time slot;

[0128] (3) The spatial relationship of the last time slot of the multi-time slot is applied to all time slots of the multi-time slot.

[0129] The above (1) and (3) correspond to using the default spatial relationship of a specific time slot in a multi-time slot as the default spatial relationship of the other time slots in the multi-time slot. The above (2) corresponds to determining the default spatial relationship of each time slot in the multi-time slot according to the (most recent) activated TCI state in each time slot (or the QCL assumption of the CORESET with the smallest CORESET ID).

[0130] In the above (1), the UE may also determine the default spatial relationship of each time slot based on the RS resource index of the QCL type D RS resource in the default spatial relationship of the first time slot of the multi-time slot (or the TCI state or QCL assumption referenced in the default spatial relationship). In addition, in the above (1), the UE may also assume that the spatial domain filter used in the reception of the QCL type D RS resource in the default spatial relationship of the first time slot of the multi-time slot (or the TCI state or QCL assumption referenced in the default spatial relationship) is the same as the spatial domain filter used in the PUCCH transmission of each time slot.

[0131] According to (1) above, it is possible to ensure that the UE uses the same spatial relationship to transmit multi-slot transmissions. Therefore, the base station can use the same beam to receive multi-slot transmissions from the UE, or perform in-phase synthesis of the received signal / DMRS of each slot, and can expect to improve the reception quality / channel estimation accuracy.

[0132] In the above (2), the UE may also determine the default spatial relationship of a time slot based on the RS resource index of the QCL type D RS resource in the default spatial relationship of a time slot of the multi-time slot (or the TCI state or QCL assumption referenced in the default spatial relationship). In addition, in the above (2), the UE may also assume that the spatial domain filter used in the reception of the QCL type D RS resource in the default spatial relationship of a time slot of the multi-time slot (or the TCI state or QCL assumption referenced in the default spatial relationship) is the same as the spatial domain filter used in the PUCCH transmission of the time slot.

[0133] According to (2) above, when the TCI state / QCL assumption of the reference destination (set as the source) in the default spatial relationship is updated, the UE can quickly update the UL transmitted beam. When the TCI state / QCL assumption of the reference destination is updated, the assumed optimal beam changes, so it is preferable to update the UL beam to the optimal beam earlier.

[0134] In the above (3), the UE may also determine the default spatial relationship of each time slot based on the RS resource index of the QCL type D RS resource in the default spatial relationship of the last time slot of the multi-time slot (or the TCI state or QCL assumption referenced in the default spatial relationship). In addition, in the above (3), the UE may also assume that the spatial domain filter used in the reception of the QCL type D RS resource in the default spatial relationship of the last time slot of the multi-time slot (or the TCI state or QCL assumption referenced in the default spatial relationship) is the same as the spatial domain filter used in the PUCCH transmission of each time slot.

[0135] According to the above (3), it is possible to expect to obtain the advantages of both the above (1) and (2).

[0136] Figures 1A to 1C This diagram shows an example of a default spatial relationship of multiple time slots according to an embodiment. In this example, for simplicity, a time slot = 1 ms (subcarrier spacing = 15 kHz) is shown.

[0137] In this example, the UE receives a MAC CE specifying (updating) the TCI state of CORESET0 before slot n, and transmits a HARQ-ACK for the PDSCH used to transmit the MAC CE in slot n. Furthermore, the UE is configured to perform multi-slot PUCCH transmission across four slots, slot n+3 to slot n+6.

[0138] In the existing Rel. 15 / 16 specifications, the TCI state update based on this MAC CE is applied starting from the first slot after 3 ms of slot n. As shown in the figure, CORESET 0 in slot n+2 corresponds to the old (pre-update) TCI state. Although not shown, CORESET 0 in slots n+4 and beyond corresponds to the new (post-update) TCI state. Therefore, in this example, the multi-slot PUCCH straddles the TCI state update timing for CORESET 0.

[0139] Figures 1A to 1C The following respectively illustrate the situations in which the default spatial relationship of each time slot is determined according to the above (1) to (3).

[0140] exist Figure 1A In the process, the UE also applies the default spatial relationship (TCI state of CORESET0 before the TCI state update is reflected) at the initial time slot of the multi-slot, that is, the time point of slot n+3, to other time slots and sends the multi-slot PUCCH.

[0141] exist Figure 1B In the process, the UE applies the default spatial relationship of the time point of each time slot of the multi-slot (before the TCI status update is reflected, it is the TCI status of CORESET0 before the update, and after the TCI status update is reflected, it is the TCI status of CORESET0 after the update) to each time slot and sends the multi-slot PUCCH.

[0142] exist Figure 1C In the process, the UE applies the default spatial relationship of the last time slot of the multi-slot, that is, the time point of slot n+6 (TCI state of CORESET0 after the TCI state update is reflected) to other time slots and sends multi-slot PUCCH.

[0143] According to the embodiment described above, the UE can appropriately determine the default spatial relationship for repeated transmission.

[0144] <Other>

[0145] Furthermore, the above-mentioned embodiments describe UL multi-slot transmission, but are not limited thereto and may also be applied to DL multi-slot transmission (multi-slot reception from the UE's perspective).

[0146] The following terms (on the left side of the colon) in each of the above-mentioned embodiments may be replaced with terms on the right side of the colon (which may be directly readable terms).

[0147] Send: Receive

[0148] Repeated transmission (multi-slot transmission): repeated reception, multi-slot reception

[0149] Spatial relationship: TCI state (QCL concept)

[0150] Default spatial relationship: default TCI state (default QCL assumption), default TCI state (default QCL assumption) for repeatedly transmitted (received) PDSCH / PDCCH

[0151] Furthermore, the above-mentioned embodiments can be used independently for each channel / signal or can be used in common for multiple channels / signals. For example, the default spatial relationship of PUCCH / PUSCH / SRS can be determined by different methods or by a common method.

[0152] In addition, the above embodiments may also be applied to a UE that reports capability information indicating that it has a specific capability or supports the capability. The capability information may also be capability information related to support of a default spatial relation / path loss RS, for example, capability information related to support of a dedicated PUCCH / SRS and a default spatial relation / path loss RS for a PUSCH scheduled using DCI format 0_0.

[0153] In addition, the above-mentioned embodiments can be applied when multiple TRPs or multiple panels (operations) are set for the UE, or when they are not.

[0154] In addition, the multi-slot PUSCH in the present disclosure may also be replaced by a multi-slot PUSCH that does not have a spatial relationship set for SRS resources (use = codebook or non-codebook) corresponding to the SRI of the PUSCH and refers to a default spatial relationship.

[0155] In addition, the multi-slot SRS in the present disclosure may also be replaced by an SRS that is not set to a spatial relationship of the SRS resource and refers to a default spatial relationship in an SRS resource that is set (or indicated or notified) for multi-slot transmission. In addition, the multi-slot SRS may also be limited to at least one of A-SRS, P-SRS, and SP-SRS. In addition, the multi-slot SRS may also be limited to an SRS corresponding to a specific purpose (e.g., at least one of codebook, non-codebook beam management, and antenna switching).

[0156] In addition, not limited to the default spatial relationship / TCI state, (1) to (3) of the above-mentioned embodiments can also be applied to the spatial relationship / TCI state specified by DCI / MAC CE.

[0157] (Wireless Communication System)

[0158] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0159] Figure 2 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), or the like.

[0160] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0161] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0162] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0163] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The arrangement and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0164] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0165] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0166] Furthermore, the user terminal 20 may communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0167] Multiple base stations 10 can also be connected by wired (for example, optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) donor, and the base station 12 equivalent to the relay station can also be called an IAB node.

[0168] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0169] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0170] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0171] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0172] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0173] In addition, as uplink channels, the wireless communication system 1 can also use an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc.

[0174] The PDSCH is used to transmit user data, higher-layer control information, and system information blocks (SIBs). The PUSCH can also be used to transmit user data, higher-layer control information, and the Master Information Block (MIB). The PBCH can also be used to transmit the Master Information Block (MIB).

[0175] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0176] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0177] In PDCCH detection, a control resource set (CORESET) and a search space can also be used. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space settings.

[0178] A search space may also correspond to PDCCH candidates that correspond to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc., used in this disclosure, may be used interchangeably.

[0179] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request acknowledgment (HARQ-ACK)), ACK / NACK, and scheduling request (SR)) may also be transmitted via the PUCCH. A random access preamble used to establish a connection with a cell may also be transmitted via the PRACH.

[0180] In the present disclosure, downlink, uplink, etc. may be expressed without the word "link." Furthermore, various channels may be expressed without the word "physical" at the beginning.

[0181] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0182] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for the PBCH) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0183] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0184] (Base Station)

[0185] Figure 3 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission path interface 140 may be provided.

[0186] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0187] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which this disclosure relates.

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

[0189] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on the common knowledge in the technical field involved in this disclosure.

[0190] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0191] The transmitting and receiving antenna 130 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0192] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0193] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0194] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0195] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0196] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0197] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0198] For the obtained baseband signal, the transmitting and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, etc. to obtain user data, etc.

[0199] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0200] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0201] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0202] In addition, the transmitting and receiving unit 120 can also send information (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and Downlink Control Information (DCI)) for determining a default spatial relationship applied in the multi-slot transmission based on the spatial relationship applied in one or more time slots of the multi-slot transmission to the user terminal 20.

[0203] The transmitting and receiving unit 120 may also receive the multi-slot transmission from the user terminal 20 using the spatial domain transmit filter based on the default spatial relationship.

[0204] (User Terminal)

[0205] Figure 4 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0206] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, but it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0207] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which this disclosure relates.

[0208] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0209] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on the common knowledge in the technical field involved in this disclosure.

[0210] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0211] The transmitting and receiving antenna 230 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0212] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0213] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0214] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0215] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0216] In addition, whether or not to apply DFT processing may also be based on the transform precoding setting. For a certain channel (e.g., PUSCH), if transform precoding is activated (enabled), the transmitting / receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the aforementioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting / receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the aforementioned transmission processing without performing DFT processing.

[0217] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0218] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0219] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0220] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0221] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0222] In addition, the control unit 210 may also determine a default spatial relationship to be applied in the multi-slot transmission based on the spatial relationship applied in one or more time slots of the multi-slot transmission.

[0223] The transmitting and receiving unit 220 may also implement the multi-slot transmission using a spatial domain transmit filter based on the default spatial relationship. In addition, the multi-slot transmission may also be repeated transmission of at least one of an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), and a sounding reference signal (Sounding Reference Signal (SRS)).

[0224] The control unit 210 may also determine a PL-RS corresponding to the default spatial relationship, and control the power of the multi-slot transmission based on the PL-RS.

[0225] The control unit 210 may also determine the default spatial relationship based on the spatial relationship of the initial time slots of the multi-slot transmission.

[0226] The control unit 210 may also determine the default spatial relationship based on the spatial relationship between the time slots in the multi-slot transmission.

[0227] As described in the terminal of the present application, the control unit 210 determines the default spatial relationship based on the spatial relationship of the last time slot of the multi-slot transmission.

[0228] (Hardware Structure)

[0229] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wired, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0230] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any of them are as described above, and the implementation method is not particularly limited.

[0231] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 5 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above 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.

[0232] In addition, in this disclosure, the terms such as device, circuit, equipment, section, and unit are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0233] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0234] Regarding the various functions in the base station 10 and the user terminal 20, for example, they are achieved by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0235] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, at least a portion of the aforementioned control unit 110 (210) and the transmitting and receiving unit 120 (220) may also be implemented by the processor 1001.

[0236] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes based on the program. As a program, a program that causes a computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks can also be implemented similarly.

[0237] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program code), software modules, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.

[0238] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, or a key drive), a magnetic stripe, a database, a server, or other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0239] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the aforementioned transmitting and receiving unit 120 (220), transmitting and receiving antenna 130 (230), and the like may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0240] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

[0241] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0242] Furthermore, the base station 10 and user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and may use such hardware to implement part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0243] (Variation)

[0244] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, or may be referred to as a pilot, pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, frequency carrier, carrier frequency, etc.

[0245] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of the parameter set (numerology).

[0246] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0247] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a time slot may also be a time unit based on a parameter set.

[0248] A time slot may also contain multiple mini-slots. Each mini-slot may also consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

[0249] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective equivalents. Furthermore, the terms frame, subframe, time slot, mini-time slot, and symbol may be used interchangeably in this disclosure.

[0250] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. In other words, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI can also be called a time slot, a mini-time slot, etc. instead of a subframe.

[0251] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0252] The TTI may also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and may also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0253] In addition, when a time slot or a mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can also be the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit for scheduling can also be controlled.

[0254] A TTI having a time length of 1 ms may 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 time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0255] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than long TTI and greater than 1ms.

[0256] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0257] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0258] In addition, one or more RBs may also be referred to as a physical resource block (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, etc.

[0259] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0260] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a particular carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0261] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0262] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific channels / signals outside of the activated BWP. In addition, the terms "cell," "carrier," and the like in this disclosure may be replaced with "BWP."

[0263] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0264] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0265] In this disclosure, the names used for parameters, etc., are not intended to be limiting in any respect. Furthermore, the mathematical formulas for these parameters, etc., may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0266] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0267] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0268] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or appended. Output information, signals, etc. may also be deleted. Input information, signals, etc. may also be sent to other devices.

[0269] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0270] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, for example, RRC Connection Setup message, RRC Connection Reconfiguration message, etc. In addition, MAC signaling may also be notified using MAC Control Element (CE), for example.

[0271] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0272] The determination can be made by a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparison of numerical values (for example, comparison with a specific value).

[0273] Whether software is called software, firmware, middleware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable file, execution thread, procedure, function, etc.

[0274] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0275] The terms "system" and "network" used in this disclosure can be used interchangeably. "Network" may also refer to devices included in the network (eg, base stations).

[0276] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)" "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0277] In this disclosure, terms such as "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", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macro cell, small cell, femto cell, or pico cell.

[0278] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entire coverage area of at least one of the base station and base station subsystem that provides communication services within the coverage area.

[0279] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0280] The mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other appropriate terms.

[0281] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station may also be a device mounted on a mobile object, a mobile object itself, etc. The mobile object may be a means of transportation (e.g., a vehicle, an aircraft, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0282] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, which may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0283] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0284] In the present disclosure, actions are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0285] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, sequences, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the elements of various steps described in this disclosure are presented in an illustrative order, but are not limited to the specific order presented.

[0286] The various modes and embodiments described in the present disclosure may 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), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 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, and next-generation systems based on these. Furthermore, multiple systems may be combined (for example, LTE or LTE-A, in combination with 5G, etc.) for application.

[0287] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0288] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not necessarily imply that only two elements may be used, or that the first element must in some way take precedence over the second element.

[0289] The term "determining" as used in this disclosure may encompass a variety of actions. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc. as performing a "determination."

[0290] In addition, "judgment (decision)" can also be a situation where receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0291] Furthermore, “judgment (decision)” can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. are considered “judgment (decision)”. In other words, “judgment (decision)” can also refer to situations where certain actions are considered “judgment (decision)”.

[0292] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0293] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between the two elements being "connected" or "coupled." The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be replaced by "access."

[0294] In the present disclosure, when two elements are connected, it is possible to consider them being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0295] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same way as "different."

[0296] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," have an inclusive meaning. Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0297] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0298] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The inventions disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the descriptions in this disclosure are for illustrative purposes only and are not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal comprising: a control unit configured to control so that the default spatial relationship applied to the initial time slot of the multi-slot transmission is also applied to the other time slots of the multi-slot transmission; and a sending unit, configured to implement the multi-slot sending, The control unit uses the transmission configuration indication state, ie, the TCI state, of the control resource set CORESET with the lowest index in the activated downlink bandwidth part BWP as the default spatial relationship.

2. The terminal according to claim 1, wherein: The multi-slot transmission is the multi-slot transmission of the uplink control channel PUCCH.

3. A wireless communication method for a terminal, comprising: A step of controlling so that the default spatial relationship applied to the initial time slot of the multi-slot transmission is also applied to the other time slots of the multi-slot transmission respectively; and implementing the step of multi-slot transmission, The transmission configuration indication state, ie, the TCI state, of the control resource set CORESET with the lowest index in the activated downlink bandwidth part BWP is used as the default spatial relationship.

4. A base station comprising: a control unit configured to configure the default spatial relationship applied in an initial time slot of a multi-slot transmission to be applied to the other time slots of the multi-slot transmission; and a receiving unit, receiving the multi-slot transmission, As the default spatial relationship, the transmission configuration indication state, ie, the TCI state, of the control resource set CORESET with the lowest index within the activated downlink bandwidth part BWP is used.

5. A system having a terminal and a base station, wherein: The terminal has: a control unit configured to control so that the default spatial relationship applied to the initial time slot of the multi-slot transmission is also applied to the other time slots of the multi-slot transmission; as well as a sending unit, configured to implement the multi-slot sending, The base station has: a receiving unit, receiving the multi-slot transmission, The control unit of the terminal uses the transmission configuration indication state, ie, the TCI state, of the control resource set CORESET with the lowest index in the activated downlink bandwidth part BWP as the default spatial relationship.

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