Terminal, base station, system and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure includes: a receiving unit for receiving a physical downlink control channel setting (PDCCH setting) including a plurality of different control resource set pool indices (CORESET pool indices); and a control unit for determining, based on the downlink signal, a quasi-co-location assumption (QCL assumption) to be applied to the A-CSI-RS when the scheduling offset of the non-periodic channel state information reference signal (A-CSI-RS) is less than a threshold value and there are other downlink signals using the indicated transmission control indication state (TCI state) in the same codeword as the A-CSI-RS. According to one embodiment of the present disclosure, the A-CSI-RS can be appropriately measured.

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) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9)).

[0003] Successor systems of LTE (also known as, for example, 5th generation mobile communication system (5G), 5G+(plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being 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 future wireless communication systems (e.g., NR), a study is being conducted on a user terminal (terminal, user terminal, user equipment (UE)) controlling transmission and reception processing based on information related to Quasi-Co-Location (QCL). In addition, a study is being conducted on transmitting downlink (DL) signals from multiple transmission points.

[0009] However, when receiving DL signals from multiple transmission points, the measurement method of the aperiodic channel state information reference signal (A-CSI-RS) is unclear. If the A-CSI-RS is not measured properly, there is a concern that throughput may be reduced, communication quality may be reduced, etc.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately measure an A-CSI-RS.

[0011] Means for solving problems

[0012] A terminal involved in one method of the present disclosure comprises: a receiving unit, which receives a physical downlink control channel (PDCCH) setting including different multiple control resource set (CORESET) pool indices; and a control unit, which determines a quasi co-location (QCL) assumption to be applied to the above-mentioned A-CSI-RS based on the above-mentioned downlink signal when the scheduling offset of the non-periodic channel state information reference signal (A-CSI-RS) is less than a threshold and there are other downlink signals using the indicated transmit control indication (TCI) state in the same codeword as the above-mentioned A-CSI-RS.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, it is possible to appropriately measure an A-CSI-RS. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A as well as Figure 1B This is a diagram showing an example of the operation in case 1-1.

[0016] Figure 2A as well as Figure 2B This is a diagram showing another example of the operation in case 1-1.

[0017] Figure 3A as well as Figure 3B This is a diagram showing an example of the operation of option 1 in case 1-2.

[0018] Figure 4A as well as Figure 4B This is a diagram showing an example of the operation of option 2 in case 1-2.

[0019] Figure 5A as well as Figure 5B This is a diagram showing an example of the operation of option 1 in case 1-3.

[0020] Fig. 6A as well as Figure 6B This is a diagram showing an example of the operation of option 2 in case 1-3.

[0021] Fig. 7A as well as Figure 7B This is a diagram showing an example of operation in case 2.

[0022] Figure 8 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0023] Fig. 9 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0024] Fig.10 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0025] Fig.11 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0026] (TCI, spatial relationship, QCL)

[0027] In NR, research is being conducted on 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) in the UE that controls at least one of a signal and a channel (expressed as signal / channel) based on the transmission configuration indication state (Transmission Configuration Indication state (TCI state)).

[0028] The TCI state may also represent the state of a signal / channel applied to a downlink. A state corresponding to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0029] The TCI state is information related to Quasi-Co-Location (QCL) of signals / channels, and may also be referred to as spatial reception parameters, spatial relationship information, etc. The TCI state may be set for each channel or each signal to the UE.

[0030] QCL is an indicator that indicates the statistical properties of a signal / channel. For example, it may also mean that when a certain signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same among these different signals / channels (at least one of them is QCL).

[0031] In addition, the spatial reception parameter may also correspond to the UE's reception beam (eg, reception simulation beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may also be replaced by sQCL (spatial QCL).

[0032] Regarding QCL, multiple types (QCL types) may also be specified. For example, four QCL types AD may be set, in which the same parameters (or parameter sets) may be assumed to be different, and the parameters (also referred to as QCL parameters) may be expressed as follows:

[0033] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0034] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0035] QCL Type C (QCL-C): Doppler shift and average delay,

[0036] QCL type D (QCL-D): spatial reception parameters.

[0037] The situation where 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 can also be called QCL assumption.

[0038] 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.

[0039] The TCI state 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 RS). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

[0040] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0041] 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)).

[0042] In addition, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (CSI-RS)), a sounding reference signal (SRS), a tracking CSI-RS (also called Tracking Reference Signal (TRS)), and a QCL detection reference signal (also called QRS).

[0043] The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0044] The RS of QCL type X in the TCI state may also refer to an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be called a QCL source of QCL type X in the TCI state.

[0045] (Path loss RS)

[0046] Path loss PL in transmission power control of each of PUSCH, PUCCH, and SRS b、f、c (q d ) [dB] Index q of the reference signal (RS, PathlossReferenceRS) for the downlink BWP associated with the activated UL BWP b of carrier f of serving cell c used by the UE d In the present disclosure, the path loss reference RS, pathloss(PL)-RS, index q d , RS used for path loss calculation, RS resources used for path loss calculation can also be replaced with each other. In the present disclosure, calculation, estimation, measurement, and tracking can also be replaced with each other.

[0047] It is being studied whether to change the existing mechanism of higher layer filtered RSRP (higher layer filtered RSRP) used for path loss measurement when the path loss RS is updated through MAC CE.

[0048] Alternatively, in the case where the path loss RS is updated through the MAC CE, the path loss measurement based on L1-RSRP is applied. Alternatively, in the available timing after the MAC CE for the update of the path loss RS, the RSRP filtered by the higher layer is used in the path loss measurement, and before the RSRP filtered by the higher layer is applied, the L1-RSRP is used in the path loss measurement. Alternatively, in the available timing after the MAC CE for the update of the path loss RS, the RSRP filtered by the higher layer is used in the path loss measurement, and before the timing, the RSRP filtered by the higher layer of the path loss RS before it is used. Similar to the operation of Rel.15, the RSRP filtered by the higher layer may be used in the path loss measurement, and the UE tracks all path loss RS candidates set through RRC. The maximum number of path loss RS that can be set through RRC may also depend on the UE capability. Alternatively, when the maximum number of path loss RSs that can be set through RRC is X, path loss RS candidates less than X are set through RRC, and a path loss RS is selected from the set path loss RS candidates through MAC CE. The maximum number of path loss RSs that can be set through RRC may also be 4, 8, 16, 64, etc.

[0049] In the present disclosure, high-layer filtered RSRP, filtered RSRP, and layer 3 filtered RSRP (layer3filteredRSRP) may also be used interchangeably.

[0050] (Default TCI status / Default spatial relationship / Default PL-RS)

[0051] In RRC connection mode, when the TCI information in DCI (high-layer parameter TCI-PresentInDCI) is set to "enabled" or not set, when the time offset between the reception of DL DCI (DCI that schedules PDSCH) and the corresponding PDSCH (PDSCH scheduled by the DCI) is less than the threshold (timeDurationForQCL) (application condition, first condition), if it is not cross-carrier scheduling, the TCI state of PDSCH (default TCI state) may also be the TCI state of the lowest CORESET ID in the latest time slot in the activated DL BWP of the CC (specific UL signal). Otherwise, the TCI state of PDSCH (default TCI state) may also be the TCI state of the lowest TCI state ID of PDSCH in the activated DL BWP of the scheduled CC.

[0052] In Rel. 15, a MAC CE for activation / deactivation of the PUCCH spatial relation and a MAC CE for activation / deactivation of the SRS spatial relation are required. The PUSCH spatial relation follows the SRS spatial relation.

[0053] In Rel. 16, at least one of the MAC CE for activation / deactivation of the PUCCH spatial relationship and the MAC CE for activation / deactivation of the SRS spatial relationship may not be used.

[0054] If both the spatial relationship and PL-RS for PUCCH are not set in FR2 (application condition, second condition), the default assumption of spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied to PUCCH. If both the spatial relationship and PL-RS for SRS (SRS resources for SRS or SRS resources corresponding to SRI in DCI format 0_1 ​​that schedules PUSCH) are not set in FR2 (application condition, second condition), the default assumption of spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied to PUSCH and SRS scheduled by DCI format 0_1.

[0055] If CORESET is set in the activated DL BWP on the CC, the default spatial relationship and default PL-RS may also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in the activated DL BWP. If CORESET is not set in the activated DL BWP on the CC, the default spatial relationship and default PL-RS may also be the activated TCI state with the lowest ID of the PDSCH in the activated DL BWP.

[0056] In Rel.15, the spatial relationship of the PUSCH scheduled by DCI format 0_0 follows the spatial relationship of the PUCCH resource with the lowest PUCCH resource ID in the activated spatial relationship of the PUCCH on the same CC. In the case where the PUCCH is not transmitted on the SCell, the network also needs to update the PUCCH spatial relationship on all SCells.

[0057] In Rel.16, PUCCH configuration is not required for PUSCH scheduled by DCI format 0_0. For PUSCH scheduled by DCI format 0_0, when there is no activated PUCCH spatial relationship on the activated UL BWP within the CC, or when there are no PUCCH resources (application condition, second condition), the default spatial relationship and default PL-RS are applied to the PUSCH.

[0058] The above-mentioned threshold may also be referred to as time duration for QCL, "timeDurationForQCL", "threshold (Threshold)", "threshold for offset between aDCI indicating a TCIstate and a PDSCH scheduled by the DCI" (Threshold for offset between aDCI indicating a TCIstate and a PDSCH scheduled by the DCI)", "Threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0059] (DL receive beam management)

[0060] The UE may also be set to more than one TCI state on the serving cell. The UE completes the switching of the activated TCI state within the delay time. When the activated TCI state is updated through the MAC CE, when the updated TCI state (target TCI state) is applied (how long the delay time is) depends on whether the target TCI state is known (known, measured). When the target TCI is unknown (unknown, not measured), the UE may also apply the target TCI state after the target TCI becomes known.

[0061] If the following multiple known conditions for TCI state (conditions for TCI state to be considered known) are met, the target TCI state is known.

[0062] ·During the period from the last transmission of the RS resource used for the L1-RSRP measurement report for the target TCI state to the completion of the activation TCI state switch (TCI switching period), the RS resource used for L1-RSRP measurement is the RS in the target TCI state or the RS that is QCLed in the target TCI state.

[0063] During the TCI switching period, the TCI state switching command is received within 1280 ms from the last transmission of the RS resource for beam reporting or measurement.

[0064] • During a TCI switch period, before a TCI state switch command, the UE sends at least one L1-RSRP report for the target TCI state.

[0065] During the TCI switching period, the target TCI state is in a detectable state.

[0066] During the TCI switching period, the SSB associated with the target TCI state is in a detectable state.

[0067] During the TCI switching period, the signal-to-noise ratio (SNR) of the target TCI state is greater than -3dB.

[0068] In the case where multiple known conditions for TCI states are not met, the target TCI state is unknown.

[0069] If the target TCI state is known, the UE can receive the PDSCH carrying the MAC CE activation command in time slot n+T HARQ +(3ms+TO k *(T first-SSB +T SSB-proc )) / NR time slot length before the TCI state switching of the serving cell with the target TCI state. Until time slot n+T HARQ +(3ms+TO k *(T first-SSB )) / NR time slot length, the UE is able to receive PDCCH with the old (pre-update) TCI state.

[0070] Here, T HARQ It is the time between DL data transmission and positive response (acknowledgement). first-SSB It is the time from when the MAC CE command is decoded by the UE to when the first SSC is sent. SSB-proc About TO k , which is 1 if the target TCI state does not exist in the activated TCI state list for PDSCH, and 0 if not.

[0071] If the target TCI state is unknown, based on the reception of the PDSCH carrying the MAC CE activation command in time slot n, the UE can receive the HARQ +(3ms+T L1-RSRP +TO uk *(T first-SSB +T SSB-proc )) / NR time slot length before the TCI state switching of the serving cell with the target TCI state. Until time slot n+T HARQ +(3ms+T L1-RSRP+TO uk *(T first-SSB )) / NR time slot length, the UE is able to receive PDCCH with the old (pre-update) TCI state.

[0072] Here, T L1-RSRP is the time used for the improved L1-RSRP measurement of the receive beam. T for SSB L1-RSRP It is based on the assumption that M = 1, T Report =0 for the L1-RSRP measurement period T of SSB L1-RSRP_Measurement_Period_SSB . T for CSI-RS L1-RSRP For periodic CSI-RS and aperiodic CSI-RS when the number of resources in the resource set is at least equal to MaxNumberRxBeam, M=1, T Report =0, the L1-RSRP measurement period based on CSI-RS is T L1-RSRP_Measurement_Period_CSI-RS .TO uk The L1-RSRP measurement based on CSI-RS is 1, and the L1-RSRP measurement based on SSB is 0 when the TCI state switching includes QCL type D. In addition, when the TCI state switching includes other QCL types, TO uk When the TCI state switching includes only QCL type A, QCL type B or QCL type C, for SSB in FR2, T L1-RSRP_Measurement_Period_SSB =0, T in FR2 L1-RSRP_Measurement_Period_CSI-RS = 0. In the case where the TCI state switching includes QCL type D, T first-SSB is the time until the first SSB measurement after L1-RSRP measurement. For other ALC types, T first-SSB It is the time until the first SSC is sent after the MAC CE command is decoded by the UE. For the target TCI state, the SSB is QCL type A or QCL type C.

[0073] The switching timing to the target TCI state when the target TCI state is unknown may be the switching timing to the target TCI state when the target TCI state is known with T added thereto. L1-RSRP And get the timing.

[0074] (Multiple TRP)

[0075] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (MTRP)) using one or more panels (multi-panels) for DL ​​transmission to UE is being studied. In addition, the UE is studying the use of one or more panels to perform UL transmission to one or more TRPs.

[0076] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0077] Multiple TRPs (for example, TRP#1, #2) can also be connected through an ideal / non-ideal backhaul and exchange information, data, etc. Different code words (Code Words (CW)) and different layers can also be sent from each TRP of the multiple TRPs. As a form of multi-TRP transmission, non-coherent joint transmission (NCJT) can also be used.

[0078] In NCJT, for example, TRP#1 performs modulation mapping on a first codeword, performs layer mapping, and uses a first precoding for a first number of layers (e.g., 2 layers) to send a first PDSCH. In addition, TRP#2 performs modulation mapping on a second codeword, performs layer mapping, and uses a second precoding for a second number of layers (e.g., 2 layers) to send a second PDSCH.

[0079] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed can be defined as partially or completely repeated with respect to at least one of the time domain and the frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP can also be repeated.

[0080] It can also be assumed that the first PDSCH and the second PDSCH are not quasi-co-located. The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (eg, QCL type D).

[0081] Multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs) can also be scheduled using one DCI (single DCI, single PDCCH) (single-primary mode). Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs, multiple PDCCHs) (multiple-primary mode).

[0082] Based on such a multi-TRP scenario, more flexible transmission control using channels with good quality can be performed.

[0083] In order to support the transmission of multiple TRPs within a cell (intra-cell, with the same cell ID) and between cells (inter-cell, with different cell IDs) based on multiple PDCCHs, in the RRC setting information used to link multiple PDCCH and PDSCH pairs with multiple TRPs, a control resource set (CORESET) in the PDCCH setting information (PDCCH-Config) can also correspond to one TRP.

[0084] (CSI)

[0085] In NR, the UE uses a reference signal (or the resources used for the reference signal) to measure the channel state and feeds back (reports) the channel state information (CSI) to the network (e.g., base station).

[0086] The UE may also use at least one of the Channel State Information Reference Signal (CSI-RS), the Synchronization Signal / Broadcast Channel (SS / PBCH) block, the Synchronization Signal (SS), the DeModulation Reference Signal (DMRS), etc. to measure the channel state.

[0087] The CSI-RS resources may also include at least one of non-zero power (NZP) CSI-RS resources, zero power (ZP) CSI-RS resources, and CSI interference measurement (CSI Interference Measurement (CSI-IM)) resources.

[0088] The resources used to measure the signal components for CSI may also be referred to as signal measurement resources (SMR) or channel measurement resources (CMR). SMR (CMR) may also include, for example, NZP CSI-RS resources and SSB used for channel measurement.

[0089] The resource used to measure the interference component for CSI may also be referred to as an interference measurement resource (Interference Measurement Resource (IMR)). The IMR may include, for example, at least one of an NZP CSI-RS resource, an SSB, a ZP CSI-RS resource, and a CSI-IM resource used for interference measurement.

[0090] The SS / PBCH block is a block that includes synchronization signals (for example, the primary synchronization signal (Primary Synchronization Signal (PSS)), the secondary synchronization signal (Secondary Synchronization Signal (SSS))) and the PBCH (and the corresponding DMRS), and may also be referred to as an SS block (SSB) or the like.

[0091] In addition, CSI may also include at least one of a channel quality indicator (Channel Quality Indicator (CQI)), a precoding matrix indicator (Precoding Matrix Indicator (PMI)), a CSI-RS resource indicator (CSI-RSResource Indicator (CRI)), a SS / PBCH block resource indicator (SS / PBCH Block Resource Indicator (SSBRI)), a layer indicator (Layer Indicator (LI)), a rank indicator (Rank Indicator (RI)), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0092] CSI may include multiple parts. CSI part 1 may include information with a relatively small number of bits (for example, RI). CSI part 2 may include information with a relatively large number of bits (for example, CQI), such as information determined based on CSI part 1.

[0093] In addition, CSI can also be classified into several CSI types. The type and size of the information reported (report) can also be different according to the CSI type. For example, a CSI type set for communication using a single beam (also called type 1 (type I) CSI, single beam CSI, etc.) and a CSI type set for communication using multiple beams (also called type 2 (type II) CSI, multi-beam CSI, etc.) can also be specified. The use of CSI types is not limited to this.

[0094] As CSI feedback methods, periodic CSI (Periodic CSI (P-CSI)) reporting, aperiodic CSI (Aperiodic CSI (A-CSI, AP-CSI)) reporting, semi-persistent CSI (Semi-Persistent CSI (SP-CSI)) reporting, etc. are being studied.

[0095] The UE may also be notified of the CSI measurement setting information using higher layer signaling, physical layer signaling, or a combination thereof.

[0096] In the present disclosure, the high-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.

[0097] MAC signaling may also use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0098] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0099] The CSI measurement configuration information may also be configured using, for example, the RRC information element "CSI-MeasConfig". The CSI measurement configuration information may also include CSI resource configuration information (RRC information element "CSI-ResourceConfig"), CSI report configuration information (RRC information element "CSI-ReportConfig"), etc. The CSI resource configuration information is associated with the resources used for CSI measurement, and the CSI report configuration information is associated with how the UE implements CSI reporting.

[0100] The RRC information elements (or RRC parameters) related to the CSI reporting configuration and the CSI resource configuration are described.

[0101] The CSI report configuration information ("CSI-ReportConfig") includes resource information for channel measurement ("resourcesForChannelMeasurement"). In addition, the CSI report configuration information may also include resource information for interference measurement (for example, NZP CSI-RS resource information for interference measurement ("nzp-CSI-RS-ResourcesForInterference"), CSI-IM resource information for interference measurement ("csi-IM-ResourcesForInterference"), etc.). These resource information correspond to the ID (Identifier) ​​("CSI-ResourceConfigId") of the CSI resource configuration information.

[0102] In addition, the ID of the CSI resource configuration information corresponding to each resource information (may also be referred to as CSI resource configuration ID) may be one or more identical values, or may be different values.

[0103] The CSI resource configuration information ("CSI-ResourceConfig") may also include a CSI resource configuration information ID, CSI-RS resource set list information ("csi-RS-ResourceSetList"), a resource type ("resourceType"), etc. The CSI-RS resource set list may also include at least one of the information of the NZP CSI-RS and SSB used for measurement ("nzp-CSI-RS-SSB") and the CSI-IM resource set list information ("csi-IM-ResourceSetList").

[0104] The resource type indicates the behavior of the resource in the time domain, which can be set as "aperiodic", "semi-persistent", or "periodic". For example, the corresponding CSI-RS can also be called A-CSI-RS (AP-CSI-RS), SP-CSI-RS, and P-CSI-RS.

[0105] In addition, the channel measurement resources may be used, for example, in the calculation of CQI, PMI, L1-RSRP, etc. In addition, the interference measurement resources may be used in the calculation of L1-SINR, L1-SNR, L1-RSRQ, and other interference-related indices.

[0106] (A-CSI-RS Report / A-CSI-RS)

[0107] The triggered state is initiated using the CSI request field in the DCI.

[0108] For each A-CSI-RS resource in a CSI-RS set associated with each CSI triggering state, the UE is instructed on the QCL setting of the QCL RS source and the QCL type through high-layer signaling of QCL information (qcl-Info) including a list of references to TCI states (TCI-State) for the A-CSI-RS resources associated with the CSI triggering state. Alternatively, if a state referenced in the list is set as a reference to an RS associated with "QCL type D", the RS is an SS / PBCH block located in the same or different CC / DL BWP, or a CSI-RS resource located in the same or different CC / DL BWP and set as periodic or semi-continuous.

[0109] If the following condition a-1 is met, the UE may also follow the following processes a-1 and a-2.

[0110] [Condition a-1]

[0111] For the scheduling offset between the last codeword of the PDCCH carrying the triggered DCI (DCI that triggers A-CSI-RS) and the initial codeword of the A-CSI-RS within the non-zero power CSI-RS (NZP-CSI-RS) resource set (NZP-CSI-RSResourceSet) that is set without TRS information (high-layer parameter trs-Info), when the beam switching timing threshold (beamSwitchTiming) reported by the UE is one of {14, 28, 48}, the scheduling offset is less than the reported threshold, or when the reported threshold is one of {224, 336}, the scheduling offset is less than 48.

[0112] [Process a-1]

[0113] If there is any other DL signal with an indicated TCI state in the same codeword as the CSI-RS, the UE also applies the QCL assumption of the DL signal when receiving the A-CSI-RS. The DL signal (other DL signal) refers to (refers to) a PDSCH with an offset greater than the QCL time threshold (timeDurationForQCL), an A-CSI-RS scheduled with an offset greater than the beam switching timing threshold when the beam switching timing threshold reported by the UE is one of {14, 28, 48}, an A-CSI-RS scheduled with an offset greater than 48 when the beam switching timing threshold reported by the UE is one of {224, 336}, a periodic CSI-RS (P-CSI-RS), and a semi-persistent CSI-RS (SP-CSI-RS).

[0114] [Process a-2]

[0115] Otherwise, when receiving the A-CSI-RS, the UE applies the QCL assumption used in the CORESET associated with the monitored search space and having the lowest CORESET ID (the lowest controlResourceSetId) in the last time slot in which one or more CORESETs within the activated BWP of the serving cell are monitored.

[0116] If the following condition b-1 is met, the UE may also follow the following process b-1.

[0117] [Condition b-1]

[0118] For the scheduling offset between the last codeword of the PDCCH carrying the triggered DCI (DCI that triggers A-CSI-RS) and the initial codeword of the A-CSI-RS, when the beam switching timing threshold (beamSwitchTiming) reported by the UE is one of {14, 28, 48}, the scheduling offset is above the reported threshold, or when the reported threshold is one of {224, 336}, the scheduling offset is above 48.

[0119] [Process b-1]

[0120] The UE is expected to apply the QCL assumption in the TCI state indicated for the A-CSI-RS resources in the CSI triggering state indicated by the CSI triggering field (CSI request field) in the DCI.

[0121] It is being studied that in a multi-TRP system based on a single DCI, when the scheduling offset of A-CSI-RS is less than a threshold (for example, beam switching timing threshold, beamSwitchTiming), the UE can also follow the following processes A-1 and A-2.

[0122] [Process A-1]

[0123] If there is any other DL signal with an indicated TCI state in the same codeword as the A-CSI-RS, the UE may also follow the following procedures A-1-1 and A-1-2.

[0124] [[Process A-1-1]]

[0125] The UE applies the QCL type D of the TCI state (one or two TCI states) of the DL signal to the buffering of the codewords of the A-CSI-RS.

[0126] [[Process A-1-2]]

[0127] After completing buffering and DCI decoding, the UE can measure CSI on the A-CSI-RS as in the following procedures A-1-2-1 and A-1-2-2.

[0128] [[[Process A-1-2-1]]]

[0129] In the case where the DL signal (other DL signal) refers to a PDSCH scheduled using two TCI states, the UE uses the A-CSI-RS buffered using the QCL type D of the first TCI state of the DL signal for CSI measurement.

[0130] [[[Process A-1-2-2]]]

[0131] In case that the DL signal (other DL signal) indicates a TCI state, the UE uses the buffered A-CSI-RS for CSI measurement.

[0132] [Process A-2]

[0133] If there is no other DL signal with the indicated TCI state in the same codeword as the A-CSI-RS, the UE may also follow the following process A-2-1.

[0134] [[Process A-2-1]]

[0135] The UE uses the QCL type D of the default TCI state (one or two TCI states) of the PDSCH for buffering of the codewords of the A-CSI-RS. The default TCI state of the PDSCH is the two TCI states corresponding to the lowest code point among the TCI code points containing two different TCI states.

[0136] For example, the UE receives CSI-RS1 using TCI state 1 and receives CSI-RS1 using TCI state 2. The UE buffers the two received signals (stores them in a memory).

[0137] [[Process A-2-2]]

[0138] After completion of buffering and DCI decoding, the UE can measure CSI on the A-CSI-RS as in any of the following options 1 and 2.

[0139] [[[Option 1]]]

[0140] The UE uses the A-CSI-RS buffered by using the QCL type D of the first TCI state for CSI measurement. The UE may also buffer the A-CSI-RS without using the QCL type D of the second TCI state.

[0141] [[[Option 2]]]

[0142] If the indicated TCI state of the A-CSI-RS is the same as one of the two default TCI states, the UE will use the buffered A-CSI-RS of the QCL type D of the TCI state that is the same as the indicated TCI state for CSI measurement. If the indicated TCI state of the A-CSI-RS is different from either of the two default TCI states, the UE will use the buffered A-CSI-RS of the QCL type D of the first default TCI state for CSI measurement.

[0143] However, in multi-PDSCH based on multi-DCI (multi-PDCCH), the operation of measuring A-CSI-RS is unclear. If A-CSI-RS is not measured properly, there is a concern that throughput may be reduced, communication quality may be reduced, and the like.

[0144] Therefore, the inventors of the present invention conceived a method for measuring A-CSI-RS.

[0145] In the present disclosure, "A / B" and "at least one of A and B" may be used interchangeably.

[0146] In the present disclosure, the panel, uplink (UL) transmission entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a certain signal (for example, demodulation reference signal (DMRS)) port), antenna port group of a certain signal (for example, DMRS port group), group for multiplexing (for example, code division multiplexing (CDM)) group, reference signal group, CORESET group), CORESET pool, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer) can also be replaced with each other. In addition, the panel identifier (ID) and the panel can also be replaced with each other. In the present disclosure, TRP ID and TRP can also be replaced with each other.

[0147] In the present disclosure, index, ID, indicator, resource ID, etc. may also be interchangeable.

[0148] In the present disclosure, cell, CC, carrier, BWP, activated DL BWP, activated UL BWP, and frequency band may also be replaced with each other. In the present disclosure, RRC parameters, higher layer parameters, RRC information elements (IEs), and RRC messages may also be replaced with each other.

[0149] In the present disclosure, beam, TCI state, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, UE reception beam, DL reception beam, DL precoding, DL precoder, DL-RS, QCL type D in TCI state, RS of QCL type D in TCI state, RS of QCL type D in TCI state or QCL assumption, RS of QCL type A in TCI state or QCL assumption may also be replaced with each other. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS may also be replaced with each other.

[0150] In the present disclosure, a UE with multiple TRPs set can also determine at least one of the TRPs corresponding to the DCI, the TRP corresponding to the PDSCH scheduled by the DCI, or the UL transmission (PUCCH, PUSCH, SRS, etc.) based on at least one of the following.

[0151] ·The value of a specific field included in the DCI (e.g., a field specifying the TRP, an antenna port field, a PRI).

[0152] DMRS corresponding to the scheduled PDSCH / PUSCH (for example, the DMRS sequence, resources, CDM group, DMRS port, DMRS port group, antenna port group, etc.).

[0153] · The DMRS corresponding to the PDCCH on which the DCI is transmitted (for example, the sequence, resources, CDM group, DMRS port, DMRS port group, etc. of the DMRS).

[0154] The CORESET that received the DCI (e.g., the CORESET pool ID of the CORESET, the ID of the CORESET, the scrambling ID (which may also be replaced by the sequence ID), resources, etc.).

[0155] RS (RS related group, etc.) used in TCI status, QCL assumption, spatial relationship information, etc.

[0156] In the present disclosure, a single PDCCH (DCI) may also be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)). In addition, a multiple PDCCH (DCI) may also be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0157] In the present disclosure, a single PDCCH may also be conceived to be supported when multiple TRPs utilize an ideal backhaul. Multiple PDCCHs may also be conceived to be supported when multiple TRPs utilize a non-ideal backhaul.

[0158] In addition, the ideal backhaul may also be referred to as DMRS port group type 1, reference signal association group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may also be referred to as DMRS port group type 2, reference signal association group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0159] In the present disclosure, multiple TRPs, multiple TRP systems, multiple TRP transmissions, and multiple PDSCHs may also be replaced with each other. In the present disclosure, single DCI, single PDCCH, multiple TRP systems based on single DCI, and two TCI states on at least one TCI code point are activated may also be replaced with each other.

[0160] In the present disclosure, activation, update, indication and setting may be used interchangeably.

[0161] In the present disclosure, the scheduling offset of A-CSI-RS, the scheduling offset between the last codeword of the PDCCH carrying the triggered DCI and the initial codeword of the A-CSI-RS, and the scheduling offset between the last codeword of the PDCCH carrying the triggered DCI and the initial codeword of the A-CSI-RS in the non-zero power CSI-RS (NZP-CSI-RS) resource set (NZP-CSI-RSResourceSet) that is set without TRS information (high-level parameter trs-Info) can also be replaced with each other.

[0162] In the present disclosure, the threshold, the beam switching timing threshold (beamSwitchTiming), the beam switching timing threshold reported by the UE, and the constant (for example, 48) may also be replaced with each other.

[0163] In the present disclosure, when the scheduling offset of the A-CSI-RS is less than the beam switching timing threshold, the TCI state used for the A-CSI-RS and the default TCI state of the A-CSI-RS may also be replaced with each other.

[0164] In the present disclosure, other DL signals, known other DL signals, and other DL signals satisfying known conditions for TCI status may also be replaced with each other.

[0165] In the present disclosure, the TCI state, the A-CSI-RS buffered using the TCI state, and the A-CSI-RS received using the TCI state may also be replaced with each other.

[0166] (Wireless Communication Method)

[0167] For multi-PDCCH based multi-PDSCH, in order to support multi-TRP operation in frequency range (FR) 2, two default TCI states can also be defined for PDSCH when the scheduling offset is less than the threshold (duration for QCL, timeDurationForQCL). For the same purpose, a default TCI state for A-CSI-RS can also be defined for multi-TRP scenarios.

[0168] Consider the following scenarios 1 and 2.

[0169] [Scenario 1]

[0170] If any other DL signal having an indicated TCI state exists in the same symbol as the A-CSI-RS, the following cases 1-1 to 1-3 are considered.

[0171] [[Scenario 1-1]]

[0172] If there are any other DL signals with the indicated TCI state, and at least one of the DL signals is associated with the same CORESETPoolIndex value as the PDCCH that triggers the A-CSI-RS.

[0173] In case 1-1, the UE may not buffer other DL signals.

[0174] [[Scenario 1-2]]

[0175] If there are any other DL signals with the indicated TCI state, and none of the DL signals is associated with the same CORESET pool index value as the PDCCH that triggers the A-CSI-RS.

[0176] In case 1-2, the UE may also use a default TCI state to buffer other DL signals. A default TCI state may also be the TCI state of the CORESET with the lowest ID in the latest slot associated with a CORESET pool index different from other DL signals.

[0177] [[Scenario 1-3]]

[0178] If there are any other DL signals with the indicated TCI state, and none of the DL signals are associated with the CORESET pool index value.

[0179] In scenarios 1-3, the UE may also use the two default TCI states while buffering other DL signals.

[0180] [Scenario 2]

[0181] This is the case if there is no other DL signal with the indicated TCI state in the same symbol as the A-CSI-RS.

[0182] In case 2, the UE may also use the two default TCI states while buffering other DL signals.

[0183] In scenario 1-1, the UE may also use the TCI status of other DL signals associated with the same CORESET pool index value as the PDCCH that triggers the A-CSI-RS for A-CSI-RS processing (the UE may also assume that the TCI status of other DL signals associated with the same CORESET pool index value as the PDCCH that triggers the A-CSI-RS is applied to A-CSI-RS processing).

[0184] Figure 1A as well as Figure 1B is a diagram showing an example of operation in case 1-1. In this example, two other DL signals in the same symbol as the A-CSI-RS are associated with different CORESET pool indexes 0 and 1. Figure 1A As shown in the example, when the A-CSI-RS is associated with the CORESET pool index 0, the UE assumes that the A-CSI-RS and other DL signals associated with the CORESET pool index 0 are in a QCL type D relationship. Figure 1B As shown in the example, when the A-CSI-RS is associated with the CORESET pool index 1, the UE assumes that the A-CSI-RS and other DL signals associated with the CORESET pool index 1 are in a QCL type D relationship.

[0185] Figure 2A as well as Figure 2B is a diagram showing another example of the operation in case 1-1. Figure 2A As shown in the example, when A-CSI-RS is associated with CORESET pool index 0, the UE assumes that A-CSI-RS is in a QCL type D relationship with other DL signals associated with CORESET pool index 0 in the same symbol as A-CSI-RS. Figure 2BAs shown in the example, when A-CSI-RS is associated with CORESET pool index 1, the UE assumes that A-CSI-RS is in a QCL type D relationship with other DL signals associated with CORESET pool index 1 in the same codeword as A-CSI-RS.

[0186] In scenario 1-2, the UE may also use the TCI state of the CORESET with the lowest ID and associated with the monitored search space in the CORESET in the latest time slot having the same CORESET pool index value as the PDCCH that triggers the A-CSI-RS for A-CSI-RS processing.

[0187] For scenarios 1-2 and 1-3, the UE may also follow any one of options 1 and 2 below.

[0188] [Option 1]

[0189] For A-CSI-RS processing, the UE assumes that the TCI state for other DL signals is applied.

[0190] [Option 2]

[0191] For A-CSI-RS processing, the UE assumes that the TCI state of the CORESET with the lowest ID and associated with the monitored search space is applied among all CORESETs in the latest time slot with the same CORESET pool index value as the PDCCH triggering A-CSI-RS.

[0192] Figure 3A as well as Figure 3B 1 is a diagram showing an example of the operation of Option 1 in Case 1-2. In this example, two other DL signals in the same symbol as the A-CSI-RS are associated with CORESET pool indices different from the CORESET pool indices associated with the A-CSI-RS. In this example, the UE assumes that the A-CSI-RS and the other DL signals are in a QCL type D relationship.

[0193] Figure 4A as well as Figure 4B 1-2 is a diagram showing an example of the operation of Option 2 in Case 1-2. In this example, two other DL signals in the same symbol as the A-CSI-RS are associated with CORESET pool indexes different from the CORESET pool index associated with the A-CSI-RS. In this example, the UE assumes that the A-CSI-RS is in a QCL type D relationship with the CORESET with the lowest ID and associated with the monitored search space among all CORESETs in the latest time slot with the CORESET pool index value associated with the A-CSI-RS.

[0194] Figure 5A as well as Figure 5B 1 is a diagram showing an example of the operation of Option 1 in Case 1-3. In this example, two other DL signals in the same symbol as the A-CSI-RS are not associated with the CORESET pool index. In this example, the UE assumes that the A-CSI-RS and the other DL signals are in a QCL type D relationship.

[0195] Fig. 6A as well as Figure 6B 1-3 is a diagram showing an example of the operation of Option 2 in Case 1-3. In this example, the two other DL signals in the same symbol as the A-CSI-RS are not associated with the CORESET pool index. In this example, the UE assumes that the A-CSI-RS is in a QCL type D relationship with the CORESET with the lowest ID and associated with the monitored search space among all CORESETs in the latest time slot with the CORESET pool index value associated with the A-CSI-RS.

[0196] Fig. 7A as well as Figure 7B is a diagram showing an example of operation in case 2. In this example, there is no other DL signal with an indicated TCI state in the same symbol as the A-CSI-RS. In this example, the UE assumes that the A-CSI-RS is in a QCL type D relationship with the CORESET with the lowest ID and associated with the monitored search space among all CORESETs in the latest time slot with the CORESET pool index value associated with the A-CSI-RS.

[0197] For option 1, if the TCI state of other DL signals is different from the default TCI state of PDSCH, the UE may not receive more than two TCI states. For option 2, the UE needs to receive at most two TCI states in DL reception. If the complexity of the UE is considered, option 2 is preferred.

[0198] In case Option 2 is used for Case 1-3, the UE may also follow any one of the following Options 2-1 to 2-3.

[0199] [[Option 2-1]]

[0200] The UE may also drop DL signals using the indicated TCI state that are not associated with the CORESET pool index.

[0201] [[Option 2-2]]

[0202] The UE assumes that the TCI state of the DL signal using the indicated TCI state that is not associated with the CORESET pool index is the same as one of the default TCI states of the PDSCH. For example, one of the default TCI states of the PDSCH can be either the first default TCI state or the second default TCI state.

[0203] [[Option 2-3]]

[0204] New UE capabilities (capabilities, capability information) supporting more than two TCI states may also be defined. UEs supporting the new UE capabilities may also not discard any DL signals. UEs not supporting the new UE capabilities may also discard DL signals using the indicated TCI state that are not associated with the CORESET pool index.

[0205] In multi-TRP based on multi-DCI, when the scheduling offset of A-CSI-RS is less than the beam switching threshold, the UE may also follow at least one of the following processes 1-1 and 1-2.

[0206] [Process 1-1]

[0207] If there are any other DL signals with an indicated TCI state, and at least one of the DL signals is associated with the same CORESET pool index value as the PDCCH that triggers the A-CSI-RS, the UE assumes that the TCI state of the other DL signals associated with the same CORESET pool index value as the PDCCH that triggers the A-CSI-RS is applied for A-CSI-RS processing.

[0208] [Process 1-2]

[0209] In the absence of that, the UE assumes that the TCI state of the CORESET with the lowest ID and associated with the monitored search space among all CORESETs in the latest time slot with the same CORESET pool index value as the PDCCH that triggered the A-CSI-RS is applied for A-CSI-RS processing.

[0210] For A-CSI reporting / A-CSI-RS when the triggered PDCCH and A-CSI-RS have the same parameter set (subcarrier spacing setting), the UE may also follow at least one of the following processes 2-1 and 2-2.

[0211] [Process 2-1]

[0212] If the following condition 2-1-a is met, the UE may also follow at least one of the following processes 2-1-1 and 2-1-2.

[0213] [[Condition 2-1-a]]

[0214] For the scheduling offset between the last codeword of the PDCCH carrying the triggered DCI (DCI that triggers A-CSI-RS) and the initial codeword of the A-CSI-RS within the non-zero power CSI-RS (NZP-CSI-RS) resource set (NZP-CSI-RSResourceSet) that is set without TRS information (high-layer parameter trs-Info), when the beam switching timing threshold (beamSwitchTiming) reported by the UE is one of {14, 28, 48}, the scheduling offset is less than the reported threshold, or when the reported threshold is one of {224, 336}, the scheduling offset is less than 48.

[0215] [[Process 2-1-1]]

[0216] If there is any other DL signal with an indicated TCI state in the same codeword as the CSI-RS, the UE also applies the QCL assumption of the DL signal when receiving the A-CSI-RS. The DL signal (other DL signal) refers to (refers to) a PDSCH with an offset greater than the QCL time threshold (timeDurationForQCL), an A-CSI-RS scheduled with an offset greater than the beam switching timing threshold when the beam switching timing threshold reported by the UE is one of {14, 28, 48}, an A-CSI-RS scheduled with an offset greater than 48 when the beam switching timing threshold reported by the UE is one of {224, 336}, a periodic CSI-RS (P-CSI-RS), and a semi-persistent CSI-RS (SP-CSI-RS).

[0217] [[Process 2-1-2]]

[0218] Otherwise, when receiving the A-CSI-RS, the UE applies the QCL assumption used in the CORESET associated with the monitored search space and having the lowest CORESET ID (the lowest controlResourceSetId) in the last time slot in which one or more CORESETs within the activated BWP of the serving cell are monitored.

[0219] [Process 2-2]

[0220] If the following condition 2-2-a is met, the UE may also follow at least one of the following processes 2-2-1 and 2-2-2.

[0221] [[Condition 2-2-a]]

[0222] For the UE, the scheduling offset between the last codeword of the PDCCH carrying the triggered DCI (DCI triggering A-CSI-RS) and the initial codeword of the A-CSI-RS is set by the high-level parameter PDCCH setting (PDCCH-Config) including two different values ​​of the CORESET pool index (CORESETPoolIndex) in the CORESET information element (ControlResourceSet), and when the beam switching timing threshold (beamSwitchTiming) reported by the UE is one of {14, 28, 48}, the scheduling offset becomes above the reported threshold, or when the reported threshold is one of {224, 336}, the scheduling offset is above 48.

[0223] [[Process 2-2-1]]

[0224] If there is any other DL signal with an indicated TCI state in the same codeword as the A-CSI-RS, and the DL signal is associated with the same CORESET pool index as the PDCCH that triggered the A-CSI-RS, the UE, when receiving the A-CSI-RS, applies the QCL assumption of other DL signals scheduled by the PDCCH associated with the same CORESET pool index as the PDCCH that triggered the A-CSI-RS.

[0225] [[Process 2-2-2]]

[0226] In this case, when the UE receives A-CSI-RS, in the latest time slot in which one or more CORESETs associated with the same CORESET pool index value as the PDCCH scheduling A-CSI-RS within the activated BWP of the serving cell are monitored by the UE, the QCL assumption used in the QCL indication of the PDCCH of the CORESET with the lowest CORESET-ID and associated with the monitored search space among the CORESETs set to the same CORESET pool index value as the PDCCH scheduling A-CSI-RS is applied.

[0227] According to the above embodiment, for the multi-PDSCH based on the multi-PDCCH, even when the scheduling offset of the A-CSI-RS is smaller than the threshold, it is possible to determine an appropriate QCL assumption for the A-CSI-RS.

[0228] (Wireless Communication System)

[0229] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0230] Figure 8 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in 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), and the like.

[0231] 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 (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.

[0232] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0233] 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)).

[0234] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0235] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0236] 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 (lower than 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (higher than 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 correspond to a frequency band higher than FR2.

[0237] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0238] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0239] 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), a Next Generation Core (NGC), and the like.

[0240] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0241] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0242] 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.

[0243] In the wireless communication system 1, as downlink channels, 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)) and the like may be used.

[0244] In addition, in the wireless communication system 1, as uplink channels, 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)) and the like may be used.

[0245] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0246] 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 of at least one of the PDSCH and the PUSCH.

[0247] 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.

[0248] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of 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 setting.

[0249] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0250] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) may also be transmitted through PUCCH. Random access preamble code for establishing connection with a cell may also be transmitted through PRACH.

[0251] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0252] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0253] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0254] 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).

[0255] (Base Station)

[0256] Fig. 91 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0257] 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.

[0258] 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 the present disclosure relates.

[0259] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0260] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0261] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0262] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0263] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0264] 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.

[0265] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, to generate a bit string to be sent.

[0266] 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.

[0267] The transmitting and receiving unit 120 (RF unit 122 ) may 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 .

[0268] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0269] The sending 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 to the acquired baseband signal to obtain user data, etc.

[0270] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (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 (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0271] 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.

[0272] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0273] The transmitting and receiving unit 120 may also send a physical downlink control channel (PDCCH) configuration including different multiple control resource set (CORESET) pool indices. Alternatively, when the scheduling offset of the non-periodic channel state information reference signal (A-CSI-RS) is less than a threshold value, and in the same codeword as the A-CSI-RS, there are other downlink signals using the indicated transmission control indication (TCI) state, the control unit 110 determines the quasi co-location (QCL) assumption applied to the A-CSI-RS based on the downlink signal.

[0274] (User Terminal)

[0275] Fig.10 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided in one or more pieces.

[0276] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and 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.

[0277] 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 the present disclosure relates.

[0278] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and 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.

[0279] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0280] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0281] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0282] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0283] 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.

[0284] The sending and receiving unit 220 (sending processing unit 2211), for example, 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.

[0285] 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.

[0286] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0287] 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 .

[0288] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0289] The sending and receiving unit 220 (receiving processing unit 2212) can also apply 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 acquired baseband signal to obtain user data, etc.

[0290] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. 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.

[0291] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 , the transmitting and receiving antenna 230 , and the transmission path interface 240 .

[0292] The transmitting and receiving unit 220 may also receive a physical downlink control channel (PDCCH) configuration including different multiple control resource set (CORESET) pool indices. Alternatively, when the scheduling offset of the non-periodic channel state information reference signal (A-CSI-RS) is less than a threshold value, and in the same codeword as the A-CSI-RS, there are other downlink signals using the indicated transmission control indication (TCI) state, the control unit 210 determines the quasi co-location (QCL) assumption applied to the A-CSI-RS based on the downlink signal.

[0293] Alternatively, when the downlink signal is scheduled via a PDCCH associated with the same CORESET pool index as the PDCCH that triggers the A-CSI-RS, the control unit 210 determines the QCL assumption of the downlink signal to be the QCL assumption of the A-CSI-RS.

[0294] Alternatively, when the downlink signal is not scheduled via a PDCCH associated with the same CORESET pool index as the PDCCH that triggers the A-CSI-RS, the control unit 210 determines the QCL assumption for the A-CSI-RS based on the CORESET associated with the same CORESET pool index as the PDCCH that triggers the A-CSI-RS.

[0295] Alternatively, when the downlink signal is not scheduled through a PDCCH associated with the same CORESET pool index as that of the PDCCH that triggers the A-CSI-RS, the control unit 210 determines, in a latest time slot in which one or more CORESETs associated with the same CORESET pool index as that of the PDCCH that triggers the A-CSI-RS are monitored, the QCL assumption of a CORESET among the one or more CORESETs that has the lowest CORESET ID and is associated with the monitored search space as the QCL assumption of the A-CSI-RS.

[0296] (Hardware Structure)

[0297] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. 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 devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected 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.

[0298] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, 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 one of them is as described above, and the implementation method is not particularly limited.

[0299] 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. Fig.11 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0300] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0301] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0302] The functions of the base station 10 and the user terminal 20 are realized, for example, 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.

[0303] 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, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0304] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that enables a computer to perform at least a part of the operations described in the above-mentioned 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 in the processor 1001, and the same can be implemented for other functional blocks.

[0305] 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 ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. 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 codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0306] 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)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0307] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0308] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0309] In addition, the processor 1001, the 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 different buses may be used between the devices.

[0310] In addition, the base station 10 and the 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), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0311] (Variation Example)

[0312] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc., depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0313] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0314] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0315] 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. In addition, a time slot may also be a time unit based on a parameter set.

[0316] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed 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 a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0317] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0318] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0319] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0320] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may also be shorter than the TTI.

[0321] In addition, when a time slot or a mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0322] 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 time slot, a sub time slot, a time slot, etc.

[0323] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0324] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0325] 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, respectively.

[0326] 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.

[0327] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0328] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0329] 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 in one carrier.

[0330] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0331] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0332] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0333] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present 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 limiting in all respects.

[0334] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0335] 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.

[0336] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0337] 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.

[0338] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (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 an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0339] 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).

[0340] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0341] Whether software is called software, firmware, middle-ware, 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 modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0342] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0343] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0344] 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.

[0345] In the present 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" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0346] 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, and each smaller area 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 entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0347] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” are used interchangeably.

[0348] There are also cases where a mobile station is 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 some other appropriate terminology.

[0349] 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. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. 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.

[0350] 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 the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by 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, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0351] 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.

[0352] In the present disclosure, operations are assumed to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0353] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0354] The various modes / implementations 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 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 expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0355] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0356] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0357] The term "determining" used in the present disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0358] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0359] In addition, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. are considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where some actions are considered as "judgment (decision)".

[0360] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0361] The “maximum transmit power” recorded in the present disclosure may mean the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0362] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0363] In the present disclosure, when two elements are connected, it can be considered that they are "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.

[0364] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted as "different".

[0365] In the present disclosure, when the terms "include", "including", and variations thereof are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0366] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0367] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A control unit, when a scheduling offset of a non-periodic channel state information reference signal A-CSI-RS is less than a threshold value and there is a downlink signal other than the A-CSI-RS using the indicated transmission control indication TCI state in the same codeword as the A-CSI-RS, In case that the other downlink signals are scheduled by a PDCCH associated with the same control resource set CORESET pool index as the physical downlink control channel PDCCH triggering the A-CSI-RS, applying the quasi co-location QCL concept of the other downlink signals to the A-CSI-RS, In a case where the other downlink signal is not scheduled by a PDCCH associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS, in a latest time slot in which one or more CORESETs associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS are monitored, applying a QCL assumption of a CORESET having a lowest CORESET ID and associated with a monitored search space among the one or more CORESETs to the A-CSI-RS; and A receiving unit receives the A-CSI-RS.

2. A wireless communication method of a terminal, comprising: When the scheduling offset of the aperiodic channel state information reference signal A-CSI-RS is less than a threshold value, and there is a downlink signal other than the A-CSI-RS using the indicated transmission control indication TCI state in the same symbol as the A-CSI-RS, In case that the other downlink signals are scheduled by a PDCCH associated with the same control resource set CORESET pool index as the physical downlink control channel PDCCH triggering the A-CSI-RS, applying the quasi co-location QCL concept of the other downlink signals to the A-CSI-RS, In a case where the other downlink signal is not scheduled by a PDCCH associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS, in a latest time slot in which one or more CORESETs associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS are monitored, a step of applying a QCL assumption of a CORESET having a lowest CORESET ID and associated with a monitored search space among the one or more CORESETs to the A-CSI-RS; and The step of receiving the A-CSI-RS.

3. A base station, comprising: A control unit, when a scheduling offset of a non-periodic channel state information reference signal A-CSI-RS is less than a threshold value and there is a downlink signal other than the A-CSI-RS using the indicated transmission control indication TCI state in the same codeword as the A-CSI-RS, In case that the other downlink signal is scheduled by a PDCCH associated with the same control resource set CORESET pool index as the physical downlink control channel PDCCH triggering the A-CSI-RS, a quasi co-located QCL assumption assumed for the other downlink signal is applied to the A-CSI-RS, In a case where the other downlink signal is not scheduled by a PDCCH associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS, it is assumed that in a latest time slot in which one or more CORESETs associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS are monitored, the QCL of the CORESET having the lowest CORESET ID and associated with the monitored search space among the one or more CORESETs is applied to the A-CSI-RS; and A sending unit sends the A-CSI-RS.

4. A system having a terminal and a base station, wherein: The terminal has: A control unit, when a scheduling offset of a non-periodic channel state information reference signal A-CSI-RS is less than a threshold value and there is a downlink signal other than the A-CSI-RS using the indicated transmission control indication TCI state in the same codeword as the A-CSI-RS, In case that the other downlink signals are scheduled by a PDCCH associated with the same control resource set CORESET pool index as the physical downlink control channel PDCCH triggering the A-CSI-RS, applying the quasi co-location QCL concept of the other downlink signals to the A-CSI-RS, In a case where the other downlink signal is not scheduled by a PDCCH associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS, in a latest time slot in which one or more CORESETs associated with the same CORESET pool index as the PDCCH triggering the A-CSI-RS are monitored, applying a QCL assumption of a CORESET having a lowest CORESET ID and associated with a monitored search space among the one or more CORESETs to the A-CSI-R; as well as A receiving unit receives the A-CSI-RS, and the base station has: A sending unit sends the A-CSI-RS.

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