Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives information pertaining to a plurality of reference signal sets for beam failure detection and information pertaining to a plurality of reference signal sets for candidate beams; and a control unit that performs control so that, in a case where instructions of two TCI states are supported by a transmission configuration indicator (TCI) field of downlink control information, after receiving a response signal of beam failure recovery, the downlink control information is transmitted to the control resource set associated with at least the reference signal set in which the beam failure was detected. The invention provides an assumption of updating antenna port quasi-co-location parameters.

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 Telecommunication 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 (3rd Generation Partnership Project (3GPP) version (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 Rel.16, communication using multiple TRPs in a certain service cell is supported. In this case, the use of a single DCI to schedule DL transmissions (e.g., PDSCH) sent from each TRP and the use of multiple DCIs to schedule DL transmissions (e.g., PDSCH) sent from each TRP are supported. In multiple TRPs based on a single DCI, the DCI sent from one TRP is used to control the scheduling of PDSCHs sent from multiple TRPs.

[0009] In addition, in future wireless communication systems, research is being conducted on the use of terminals to perform beam failure detection (BFD) / beam failure recovery (BFR). In addition, it is also considered that after Rel.17NR, in addition to BFD / BFR in cell units, BFD / BFR in other units (for example, transmit / receive point (TRP) units / panel units) will be supported.

[0010] However, in multi-TRP based on single DCI, how to perform beam update accompanying BFD / BFR in the case of supporting BFD / BFR in TRP units has not been fully studied. Without proper control of beam update accompanying BFD / BFR, there is a concern that communication quality may deteriorate.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform control of beam updating accompanying BFD / BFR even when BFD / BFR other than in cell units is supported.

[0012] Means for solving problems

[0013] A terminal involved in one embodiment of the present invention comprises: a receiving unit, which receives information related to multiple reference signal sets for beam failure detection and information related to multiple reference signal sets for candidate beams; and a control unit, which controls so that when an indication of two TCI states is supported by the transmission configuration indicator (TCI) field of the downlink control information, after receiving a response signal for beam failure recovery, the quasi-co-location parameters of the antenna port are updated for a control resource set associated with at least the reference signal set in which the beam failure was detected.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, even when BFD / BFR other than in cell units is supported, it is possible to appropriately perform control of beam updating associated with BFD / BFR. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A-Figure 1D is a diagram showing an example of a multi-TRP scenario.

[0017] Figure 2 is a diagram showing an example of a beam recovery process.

[0018] Figure 3A as well as Figure 3B This is a diagram showing an example of the relationship between a CORESET (or an activated TCI state of a CORESET) and a BFD-RS set / NBI-RS set in a multi-TRP based on a single DCI according to the first embodiment.

[0019] Figure 4A as well as Figure 4B This is a diagram showing an example of the relationship between a CORESET (or an activated TCI state of a CORESET) and a BFD-RS set / NBI-RS set in a multi-TRP based on multi-DCI according to the first embodiment.

[0020] Figure 5 This is a diagram showing an example of beam updating control of CORESET / PDCCH after BFR is completed (after reception of a BFR response) according to the first embodiment.

[0021] Figure 6 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0022] Figure 7 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0023] Figure 8 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0024] Fig. 9 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

[0025] Fig.10 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0026] (TCI, spatial relationship, QCL)

[0027] In NR, research is being conducted to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) of at least one of a signal and a channel (expressed as signal / channel) in the UE 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 equivalent to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

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

[0030] The so-called QCL is an indicator of the statistical properties of a signal / channel. For example, it can 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 (for example, spatial Rx parameter) is the same among these different multiple signals / channels (at least one of them is QCL).

[0031] In addition, the spatial reception parameter may also correspond to a reception beam of the UE (eg, a reception analog 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 rewritten as 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 (which may also be 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 in which 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 between the channel being the object (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 measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

[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 mean an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be referred to as a QCL source of QCL type X in the TCI state.

[0045] For PDCCH and PDSCH, QCL type ARS must be set, and QCL type D RS is set in an additional manner. It is difficult to estimate Doppler shift, delay, etc. through single-trigger reception of DMRS, so QCL type ARS is used to improve channel estimation accuracy. QCL type D RS is used in receiving beam determination during DMRS reception.

[0046] For example, TRS1-1, 1-2, 1-3, and 1-4 are transmitted, and TRS1-1 is notified as QCL type C / D RS through the TCI state of PDSCH. By being notified of the TCI state, the UE can use the information obtained from the results of past periodic TRS1-1 reception / measurement for PDSCH reception / channel estimation of DMRS. In this case, the QCL source of PDSCH is TRS1-1, and the QCL target is DMRS for PDSCH.

[0047] (Multiple TRP)

[0048] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) are studied to use one or more panels (multi-panels) to perform DL transmission to the UE. In addition, the UE is studied to perform UL transmission to one or more TRPs.

[0049] 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.

[0050] Figure 1A-Figure 1D is a diagram showing an example of a multi-TRP scenario. In these examples, it is assumed that each TRP is capable of sending four different beams, but is not limited to this.

[0051] Figure 1A An example is shown in which only one TRP (in this example, TRP1) among multiple TRPs transmits to the UE (may also be referred to as single mode, single TRP, etc.). In this case, TRP1 transmits both a control signal (PDCCH) and a data signal (PDSCH) to the UE.

[0052] Figure 1B An example of a situation in which only one TRP (TRP1 in this example) among multiple TRPs sends a control signal to the UE and the multiple TRPs send data signals (also referred to as single-master mode) is shown. The UE receives each PDSCH sent from the multiple TRPs based on one downlink control information (Downlink Control Information (DCI)).

[0053] Figure 1C An example of a situation (also referred to as master-slave mode) in which each of multiple TRPs sends a portion of a control signal to a UE and the multiple TRPs send data signals is shown. Part 1 of the control signal (DCI) may be sent in TRP1, and part 2 of the control signal (DCI) may be sent in TRP2. Part 2 of the control signal may also depend on part 1. The UE receives each PDSCH sent from the multiple TRPs based on these parts of the DCI.

[0054] Figure 1D An example of a situation in which each of the multiple TRPs sends a different control signal to the UE and the multiple TRPs send data signals (also referred to as a multi-master mode) is shown. A first control signal (DCI) may be sent in TRP1, and a second control signal (DCI) may be sent in TRP2. The UE receives each PDSCH sent from the multiple TRPs based on these DCIs.

[0055] In such Figure 1B In the case where one DCI is used to schedule multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs), the DCI may also be referred to as a single DCI (S-DCI, single PDCCH). Figure 1D When multiple DCIs are used to schedule multiple PDSCHs from multiple TRPs respectively, these multiple DCIs can also be called multi-DCI (M-DCI, multiple PDCCH).

[0056] Different transport blocks (Transport Block (TB)) / code words (Code Word (CW)) / different layers may be sent from each TRP of multiple TRPs. Alternatively, the same TB / CW / layer may be sent from each TRP of multiple TRPs.

[0057] As a method of multi-TRP transmission, non-coherent joint transmission (NCJT) is being studied. In NCJT, for example, TRP1 performs modulation mapping on a first codeword, and performs layer mapping to transmit a first PDSCH using a first precoding for a first number of layers (e.g., 2 layers). In addition, TRP2 performs modulation mapping on a second codeword, and performs layer mapping to transmit a second PDSCH using a second precoding for a second number of layers (e.g., 2 layers).

[0058] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed may also be defined to partially or completely overlap 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 may also overlap.

[0059] These first PDSCH and second PDSCH may also be assumed to be not in a quasi-co-location (QCL) relationship (not quasi-co-located). Reception of multiple PDSCHs may also be rewritten as simultaneous reception of PDSCHs of a certain QCL type (eg, QCL type D).

[0060] Research is underway to support repetition of PDSCH (transport block (TB) or codeword (CW)) across multiple TRPs in URLLC for multiple TRPs. Research is underway to support repetition across multiple TRPs in the frequency domain, layer (space) domain, or time domain (URLLC schemes, such as schemes 1, 2a, 2b, 3, and 4). In scheme 1, multiple PDSCHs from multiple TRPs are space division multiplexing (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency division multiplexing (FDM). In scheme 2a, the redundancy version (RV) is the same for multiple TRPs. In scheme 2b, the RVs can be the same or different for multiple TRPs. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexing (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are sent in one time slot. In Scheme 4, multiple PDSCHs from multiple TRPs are sent in different time slots.

[0061] Based on such a multi-TRP scenario, more flexible transmission control using channels of good quality can be performed.

[0062] 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 for linking multiple pairs of PDCCHs and PDSCHs with multiple TRPs, a control resource set (CORESET) in the PDCCH setting information (PDCCH-Config) can also correspond to one TRP.

[0063] When at least one of the following conditions 1 and 2 is satisfied, the UE may also determine that it is a multi-TRP based on multiple DCIs. In this case, the TRP may also be rewritten as a CORESET pool index.

[0064] [Condition 1]

[0065] The CORESET pool index that is set to 1.

[0066] [Condition 2]

[0067] The CORESET pool index is set to two different values ​​(e.g., 0 and 1).

[0068] If the following conditions are met, the UE may also determine that it is a multiple TRP based on a single DCI. In this case, the two TRPs may also be rewritten as two TCI states indicated by MAC CE / DCI.

[0069] [condition]

[0070] In order to indicate one or two TCI states for one code point of the TCI field within the DCI, "Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE" is used.

[0071] The DCI used for common beam indication can be either a UE-specific DCI format (for example, DL DCI format (for example, 1_1, 1_2), UL DCI format (for example, 0_1, 0_2)) or a UE-group common DCI format.

[0072] (Beam Failure Detection (BFD) / Beam Failure Recovery (BFR))

[0073] In NR, beamforming is used for communication. For example, UE and base station (e.g., gNB (gNodeB)) may use beams used for signal transmission (also called transmit beams, Tx beams, etc.) and beams used for signal reception (also called receive beams, Rx beams, etc.).

[0074] When beamforming is used, it is susceptible to interference caused by obstacles, so it is assumed that the quality of the radio link will deteriorate. Due to the deterioration of the radio link quality, there is a concern that radio link failures (RLF) will occur frequently. If RLF occurs, the cell needs to be reconnected, so frequent occurrence of RLF will lead to degradation of system throughput.

[0075] In NR, in order to suppress the occurrence of RLF, when the quality of a specific beam deteriorates, a switching process to other beams is implemented (which may also be called beam recovery (BR), beam failure recovery (BFR), L1 / L2 (Layer 1 / Layer 2) beam recovery, etc.). In addition, the BFR process can also be referred to as BFR.

[0076] In addition, beam failure (BF) in the present disclosure may also be referred to as link failure.

[0077] Figure 2 This is a diagram showing an example of a beam recovery process in Rel.15NR. The number of beams is an example and is not limited thereto. In the initial state (step S101), the UE performs measurement based on a reference signal (RS) resource transmitted using two beams.

[0078] The RS may also be at least one of a synchronization signal block (Synchronization Signal Block (SSB)) and a channel state measurement RS (Channel State Information RS (CSI-RS)). In addition, SSB may also be referred to as an SS / PBCH (Physical Broadcast Channel) block, etc.

[0079] RS may also be at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a mobility reference signal (MRS), a signal included in an SSB, an SSB, a CSI-RS, a demodulation reference signal (DMRS), a beam specific signal, etc., or a signal formed by extending or changing them. The RS measured in step S101 may also be referred to as an RS for beam failure detection (Beam Failure Detection RS (BFD-RS), Beam Failure Detection RS), or an RS used in a beam recovery process (BFR-RS), etc.

[0080] In step S102, the UE cannot detect the BFD-RS (or the reception quality of the RS deteriorates) because the radio waves from the base station are blocked. Such blocking may occur due to, for example, obstacles, fading, interference, etc. between the UE and the base station.

[0081] If certain conditions are met, the UE detects a beam failure. For example, if the BLER (Block Error Rate) is less than a threshold for all configured BFD-RS (BFD-RS resource settings), the UE can also detect the occurrence of a beam failure. If the occurrence of a beam failure is detected, the lower layer (physical (PHY) layer) of the UE can also notify (indicate) the higher layer (MAC layer) of the beam failure instance.

[0082] In addition, the criterion (standard) for judgment is not limited to BLER, but may also be the reference signal received power in the physical layer (Layer 1 Reference Signal Received Power (L1-RSRP)). In addition, beam failure detection may be implemented based on a downlink control channel (Physical Downlink Control Channel (PDCCH)) instead of RS measurement or on the basis of RS measurement. BFD-RS may also be expected to be quasi-co-located (Quasi-Co-Location (QCL)) with the DMRS of the PDCCH monitored by the UE.

[0083] Here, QCL is an index (indicator) indicating the statistical properties of a channel. For example, when a certain signal / channel is in a QCL relationship with other signals / channels, it can also mean that it can be assumed that at least one of Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx Parameter) is the same among these different multiple signals / channels (at least one of them is QCL).

[0084] In addition, the spatial reception parameter may also correspond to a reception beam of the UE (eg, a reception analog 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 rewritten as sQCL (spatial QCL).

[0085] Information related to BFD-RS (e.g., RS index, resource, number, number of ports, precoding, etc.), information related to beam failure detection (BFD) (e.g., the above-mentioned threshold), etc. can also be set (notified) to the UE using high-layer signaling, etc. The information related to BFD-RS can also be referred to as information related to BFR resources, etc.

[0086] The higher layer of the UE (e.g., the MAC layer) may also start a specific timer (also referred to as a beam failure detection timer) when receiving a beam failure instance notification from the PHY layer of the UE. If the MAC layer of the UE receives a beam failure instance notification more than a certain number of times (e.g., beamFailureInstanceMaxCount set by RRC) before the timer expires, the BFR may also be triggered (e.g., starting any of the random access procedures described later).

[0087] In the absence of a notification from the UE, or in the case of receiving a specific signal (beam recovery request in step S104) from the UE, the base station may also determine that the UE has detected a beam failure.

[0088] In step S103, the UE starts searching for a new candidate beam (new candidate beam) for communication in order to recover the beam. The UE can also select a new candidate beam corresponding to a specific RS by measuring the RS. The RS measured in step S103 may also be referred to as a new candidate RS, an RS for new candidate beam identification, NCBI-RS (New Candidate Beam Identification RS), an RS for new beam identification, a new beam identification RS, NBI-RS (New Beam Identification RS), CBI-RS (Candidate Beam Identification RS), CB-RS (Candidate Beam RS), etc. NBI-RS may be the same as or different from BFD-RS. In addition, the new candidate beam may also be referred to as a candidate beam or candidate RS.

[0089] The UE may also determine the beam corresponding to the RS that meets specific conditions as a new candidate beam. For example, the UE may also determine a new candidate beam based on the RS in the set NBI-RS whose L1-RSRP exceeds the threshold. In addition, the judgment criterion (standard) is not limited to L1-RSRP. The L1-RSRP associated with SSB may also be referred to as SS-RSRP. The L1-RSRP associated with CSI-RS may also be referred to as CSI-RSRP.

[0090] Information related to NBI-RS (e.g., RS resources, quantity, number of ports, precoding, etc.), information related to new beam identifier (NBI) (e.g., the above-mentioned threshold), etc. can also be set (notified) to the UE using high-layer signaling, etc. Information related to new candidate RS (or NBI-RS) can also be obtained based on information related to BFD-RS. Information related to NBI-RS can also be referred to as information related to NBI resources, etc.

[0091] In addition, BFD-RS, NBI-RS, etc. can also be rewritten with the radio link monitoring reference signal (Radio Link Monitoring RS (RLM-RS)).

[0092] In step S104, the UE that has determined the new candidate beam sends a beam recovery request (Beam Failure Recovery request (BFRQ)). The beam recovery request may also be called a beam recovery request signal, a beam failure recovery request signal, etc.

[0093] For example, BFRQ can also be sent using at least one of the uplink control channel (Physical Uplink Control Channel (PUCCH)), random access channel (Physical Random Access Channel (PRACH)), uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and configured grant (configured grant (CG)) PUSCH.

[0094] The BFRQ may also include information about the new candidate beam / new candidate RS determined in step S103. Resources for the BFRQ may also be associated with the new candidate beam. The beam information may also be notified using a beam index (Beam Index (BI)), a port index of a specific reference signal, an RS index, a resource index (e.g., a CSI-RS Resource Indicator (CSI-RS Resource Indicator (CRI)), an SSB Resource Indicator (SSBRI)), etc.

[0095] In Rel.15NR, the BFR based on the contention-based random access (Random Access (RA)) process, namely CB-BFR (Contention-Based BFR) and the BFR based on the non-contention-based random access process, namely CF-BFR (Contention-Free BFR) are being studied. In CB-BFR and CF-BFR, the UE can also use PRACH resources to send a preamble (also called RA preamble, random access channel (Physical Random Access Channel (PRACH)), RACH preamble, etc.) as BFRQ.

[0096] In CB-BFR, the UE may also send a preamble randomly selected from one or more preambles. On the other hand, in CF-BFR, the UE may also send a preamble specifically assigned from the base station UE. In CB-BFR, the base station may also assign the same preamble to multiple UEs. In CF-BFR, the base station may also assign a preamble specifically to a UE.

[0097] In addition, CB-BFR and CF-BFR may also be referred to as CB PRACH-based BFR (contention-based PRACH-based BFR (CBRA-BFR)) and CF PRACH-based BFR (contention-free PRACH-based BFR (CFRA-BFR)) respectively. CBRA-BFR may also be referred to as CBRA for BFR. CFRA-BFR may also be referred to as CFRA for BFR.

[0098] Regardless of whether it is CB-BFR or CF-BFR, information related to PRACH resources (RA preamble code) can also be notified through high-level signaling (RRC signaling, etc.). For example, the information can also include information indicating the correspondence between the detected DL-RS (beam) and the PRACH resource, and different PRACH resources can be associated with each DL-RS.

[0099] In step S105, the base station that detects the BFRQ sends a response signal (also referred to as a gNB response, etc.) to the BFRQ from the UE. The response signal may also include reconstruction information for one or more beams (e.g., composition information of DL-RS resources).

[0100] The response signal may also be sent, for example, in the UE common search space of the PDCCH. The response signal may also be notified using a PDCCH (DCI) scrambled by a UE identifier (e.g., a Cell-Radio RNTI (C-RNTI)) cyclic redundancy check (CRC). The UE may also determine at least one of the transmit beam and receive beam used based on the beam reconstruction information.

[0101] The UE may monitor the response signal based on at least one of a control resource set (COntrol REsource SET (CORESET)) for BFR and a search space set for BFR.

[0102] Regarding CB-BFR, when the UE receives the PDCCH corresponding to the C-RNTI related to itself, it can also be determined that contention resolution has succeeded.

[0103] Regarding the processing of step S105, a period for the UE to monitor the response from the base station (e.g., gNB) to the BFRQ may also be set. This period may also be referred to as a gNB response window, a gNB window, a beam recovery request response window, etc. If no gNB response is detected during this window, the UE may retransmit the BFRQ.

[0104] In step S106, the UE may send a message to the base station indicating that the beam reconfiguration is completed. This message may be sent, for example, via the PUCCH or the PUSCH.

[0105] Beam recovery success (BR success) may also indicate, for example, reaching step S106. On the other hand, beam recovery failure (BR failure) may also correspond to, for example, BFRQ transmission reaching a specific number of times or the beam failure recovery timer (Beam-failure-recovery-Timer) expiring.

[0106] In Rel.15, it is supported to use a random access procedure to perform a beam recovery procedure (e.g., notification of BFRQ) for a beam failure detected in SpCell (PCell / PSCell). On the other hand, in Rel.16, it is supported to use at least one of PUCCH (e.g., Scheduling Request (SR)) transmission for BFR and MAC CE (e.g., UL-SCH) transmission for BFR to perform a beam recovery procedure (e.g., notification of BFRQ) for a beam failure detected in SCell.

[0107] For example, the UE may also use two steps based on MAC CE to send information related to beam failure. The information related to beam failure may also include information related to the cell where the beam failure is detected and information related to the new candidate beam (or new candidate RS index).

[0108] [Step 1]

[0109] When BF is detected, PUCCH-BFR (scheduling request (SR)) may also be sent from the UE to the PCell / PSCell. Next, a UL grant (DCI) for the following step 2 may also be sent from the PCell / PSCell to the UE. When beam failure is detected, if a MAC CE (or UL-SCH) for sending information related to a new candidate beam exists, step 1 (e.g., PUCCH transmission) may be omitted and step 2 (e.g., MAC CE transmission) may be performed.

[0110] [Step 2]

[0111] Next, the UE may also use MAC CE to send information related to the (failed) cell where the beam failure is detected (e.g., cell index) and information related to the new candidate beam to the base station (PCell / PSCell) via an uplink channel (e.g., PUSCH). Then, after the BFR process, the QCL of PDCCH / PUCCH / PDSCH / PUSCH may also be updated to the new beam after a specific period (e.g., 28 symbols) from the receipt of the response signal from the base station.

[0112] In addition, the numbers of these steps are only for explanation, and multiple steps may be combined or their order may be changed. In addition, whether to implement BFR may be set to the UE using higher layer signaling.

[0113] (BFD-RS)

[0114] In Rel.16, for each BWP of a serving cell, the UE can be provided with a set of periodic (P)-CSI-RS resource configuration indices q through high-level parameters related to failure detection resources (e.g., failureDetectionResources, failureDetectionResourcesToAddModList, RadioLinkMonitoringConfig). 0 In addition, the UE can be provided with at least one set q of P-CSI-RS resource setting index and SS / PBCH block index through the candidate beam RS list (candidateBeamRSList) or the extended candidate beam RS list (candidateBeamRSListExt-r16) or the SCell candidate beam RS list (candidateBeamRSSCellList-r16). 1 Bar.

[0115] Here, q 0 The bar is a pair of 0 " is marked with an overline. Below, q 0 The bar is simply marked as q 0 .q 1 The bar is a pair of 1 " is marked with an overline. Below, q 1 The bar is simply marked as q 1 .

[0116] The set of P-CSI-RS resources q provided by the failure detection resource (eg, a specific higher layer parameter) 0 It may also be called explicit BFD-RS.

[0117] UE can also use the same 0 And the set q 1 The RS resources corresponding to the index contained in at least one set are used to implement L1-RSRP measurement, etc., and detect beam failure.

[0118] In addition, in the present disclosure, the above-mentioned high-level parameters that provide information indicating the index corresponding to the BFD resource may also be mutually rewritten with the BFD resource set, the BFD-RS set, etc. In the present disclosure, the set q of the BFD resource, the periodic CSI-RS resource setting index or the SSB index 0 , BFD-RS, BFD-RS set, and RS set can also be overwritten with each other.

[0119] In a BWP of the UE for the serving cell, no BFD-RS set q is provided through failure detection resources (e.g., failureDetectionResourcesToAddModList) 0 In the case of , the UE can also be supported to follow the following implicit BFD-RS decision process to determine the RS (set q 0 ).

[0120] [Implicit BFD-RS Decision Process]

[0121] The UE decides to include in the set q a P-CSI-RS resource configuration index having the same value as the RS index in the RS set indicated by the TCI state (TCI-State) of each CORESET used by the UE in monitoring the PDCCH. 0 The set q 0 It can also be called implicit BFD-RS.

[0122] When there are two RS indexes in a TCI state, the set q 0 The UE assumes that the set q 0 Contains at most two RS indices. The UE is in this set q 0 Inside, a single-port RS is envisaged.

[0123] In this way, even if the RS (e.g., BFD-RS) set for beam failure detection is not explicitly provided (e.g., through high-level parameters), the UE can also determine the BFD-RS (RS set) based on the TCI state corresponding to the PDCCH / CORESET.

[0124] (BFR in TRP units)

[0125] Prior to Rel.16, BFR in cell units was supported, but after Rel.17, it is envisioned that BFR outside of cell units (for example, more than one TRP unit contained in a cell) will be supported. For example, after Rel.17, the introduction of independent BFD-RS settings for each TRP in beam failure detection in multiple TRPs is being studied. Each TRP can also be associated with more than one BFD-RS.

[0126] In the present disclosure, more than one BFD-RS may also be referred to as a set of BFD-RSs (BFD-RS set). In Rel.15, a maximum of two BFD-RSs are set for each BWP. For example, the two BFD-RSs may also be referred to as a BFD-RS set. After Rel.17, the number of BFD-RSs per BWP is not limited to two, for example, the number of BFD-RSs may also be determined based on UE capabilities.

[0127] In addition, after Rel.17, in the BFRs in multiple TRPs, multiple (for example, two) BFD-RS sets can be supported for each BWP, and a maximum of N (N is an arbitrary integer) RSs can be supported for each BFD-RS set.

[0128] Furthermore, after Rel.17, a new beam identifier in multiple TRPs is being studied to support the setting of an independent NBI-RS set for each TRP when more than one NBI-RS (NBI-RS set) is set for each TRP. In the present disclosure, more than one NBI-RS may also be referred to as a set of NBI-RSs (NBI-RS set).

[0129] In addition, after Rel. 17, research is underway to associate one BFD-RS set with one NBI-RS set on a one-to-one basis.

[0130] For example, for BFR of multiple TRPs based on single / multiple DCI, a maximum of two BFD-RS sets and two BFD-RS sets set for each TRP may also be supported.

[0131] In addition, when BFR in TRP units (or panel units) is supported in addition to BFR in cell units before Rel. 16, it is assumed that BFR in a certain cell is performed using any unit. In this case, whether BFR in cell units or BFR in TRP units is applied can also be implicitly indicated to the UE.

[0132] For example, in each BWP of the serving cell, when the RS set for first beam failure detection (BFD-RS set) / RS set for candidate beams (NBI-RS set) is provided to the UE, the BFR of the cell unit is applied. On the other hand, in each BWP of the serving cell, instead of the RS set for first beam failure detection (BFD-RS set q 0 ) / RS set for candidate beams (NBI-RS set q 1 ), and when the RS set for second beam failure detection (BFD-RS set) / RS set for candidate beams (NBI-RS set) is provided to the UE, BFR in TRP units can also be applied.

[0133] For example, the RS set for second beam failure detection (BFD-RS set) may also include two BFD-RS sets (e.g., two sets of (P)-CSI-RS resource setting indices q 0，0 bar (hereinafter also denoted as q 0，0 ), q 0,1 bar (hereinafter also denoted as q 0,1 ))). In addition, the RS set for the second candidate beam (NBI-RS set) may also include two NBI-RS sets (e.g., at least two sets of P-CSI-RS resource setting indices and SS / PBCH block indices q 1,0 bar (hereinafter also denoted as q 1,0 ), q 1,1 bar (hereinafter also denoted as q 1,1 ))).

[0134] The BFD-RS set q 0，0 may also be associated with the NBI-RS set q 1,0 , and the BFD-RS set q 0,1 may also be associated with the NBI-RS set q 1,1 . In addition, the NBI-RS sets q 1,0 and q 1,1 may also be set respectively through different higher layer parameters (e.g., candidateBeamRSList1 and candidateBeamRSList2).

[0135] In this way, in a certain cell (or BWP of a certain cell), when the UE is provided with the first BFD-RS set q 0 / NBI-RS set q 1 , the UE uses this RS set to perform BFR (e.g., BFR per cell). On the other hand, when instead of the first BFD-RS set q 0 / NBI-RS set q 1 , the UE is provided with the second BFD-RS set q 0,0 , q 0,1 / NBI-RS set q 1,0 , q 1,1 , the UE uses this RS set to perform BFR (e.g., BFR per TRP).

[0136] In addition, multiple BFD-RS sets and multiple NBI-RS sets may also be associated with different TRPs. For example, the BFD-RS set q 0,0 and the NBI-RS set q 1,0 may also be associated with the first TRP (e.g., TRP#1), and the BFD-RS set q 0,0and NBI-RS set q 1,0 An association may also be made with a second TRP (eg, TRP#2).

[0137] However, as mentioned above, after Rel.17, it is envisioned to apply BFR in TRP units in multi-TRP based on single DCI and multi-TRP based on multiple DCI. For example, in multi-TRP based on single DCI, the DCI (PDCCH / CORESET) sent from one TRP is used to control the scheduling of PDSCH sent from multiple TRPs.

[0138] In the case of BFR in TRP units, the UE updates the beam (e.g., DL beam) for each TRP where beam failure is detected after BFR ends (or after receiving a BFR response). For example, for DL ​​transmission of a TRP where beam failure is detected, the UE assumes the quasi-co-location parameters of the antenna port corresponding to the RS index reported as a candidate beam (e.g., qnew from the NBI-RS set).

[0139] However, when multiple TRPs based on a single DCI are applied, only PDCCH / CORESET from a specific TRP is transmitted, so how to control the beam update of PDCCH / CORESET after the end of BFR becomes a problem. If the beam update after the end of BFR cannot be properly performed, there is a concern that the communication quality will be reduced.

[0140] The inventors of the present invention studied the control of beam updating accompanying BFD / BFR in the case of supporting BFR in TRP units and conceived of the present embodiment.

[0141] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0142] In addition, in the present disclosure, "A / B" may mean "at least one of A and B", and may also be rewritten as "A and B", or "A or B". In addition, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C", and may also be rewritten as "A, B, and C", or "A, B, or C".

[0143] In the present disclosure, cell, serving cell, CC, carrier, BWP, DL BWP, UL BWP, activated DL BWP, activated UL BWP, and band may also be mutually replaced. In the present disclosure, index, ID, indicator, and resource ID may also be mutually replaced. In the present disclosure, support, control, controllable, operation, and operation may also be mutually replaced.

[0144] In the present disclosure, configure, activate, update, indicate, enable, specify, and select may be overwritten with each other.

[0145] In the present disclosure, 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. In the present disclosure, RRC, RRC signaling, RRC parameters, high layers, high-layer parameters, RRC information elements (IEs), and RRC messages may also be overwritten with each other.

[0146] MAC signaling may also use, for example, MAC Control Element (MAC CE), 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 (OSI), etc.

[0147] In the present disclosure, MAC CE and activation / deactivation commands may also overwrite each other.

[0148] In the present disclosure, panel, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, TCI assumption, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, UE reception beam, DL beam, DL reception beam, DL precoding, DL precoder, DL-RS, RS of QCL type D assumed by TCI state / QCL, RS of QCL type A assumed by TCI state / QCL, spatial relationship, spatial domain transmission filter, UE spatial domain transmission filter, UE transmission beam, UL beam, UL transmission beam, UL precoding, UL precoder, PL-RS can also be rewritten mutually. 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, SRS can also be rewritten mutually.

[0149] In the present disclosure, the panel, the uplink (UL) transmission entity, the TRP, the spatial relationship, the control resource set (COntrol REsource SET (CORESET)), the PDSCH, the codeword, the base station, the antenna port of a certain signal (for example, the demodulation reference signal (DeModulation Reference Signal (DMRS)) port), the antenna port group of a certain signal (for example, the DMRS port group), the group for multiplexing (for example, the code division multiplexing (Code Division Multiplexing (CDM)) group, the reference signal group, the CORESET group), the CORESET pool, the CORESET subset, the CW, the redundancy version (RV), the layer (MIMO layer, the transmission layer, the spatial layer) can also be rewritten with each other. In addition, the panel identifier (Identifier (ID)) and the panel can also be rewritten with each other. In the present disclosure, the TRP ID, the TRP association ID, the CORESET pool index, the position of one of the two TCI states corresponding to a code point in the DCI field (the ordinal number, the first TCI state or the second TCI state), and the TRP can also be rewritten with each other.

[0150] In the present disclosure, panels, UE panels, RS port groups, DMRS port groups, SRS port groups, RS resource groups, DMRS resource groups, SRS resource groups, beam groups, TCI state groups, spatial relationship groups, SRS resource indicator (SRI) groups, antenna port groups, antenna groups, and CORESET groups may also be overwritten with each other.

[0151] The panel may also be associated with at least one of panel ID, UL TCI status, UL beam, L beam, DL RS resource, and spatial relationship information.

[0152] In the present disclosure, multiple TRPs, multiple TRP systems, multiple TRP transmissions, multiple PDSCHs, channels using multiple TRPs, channels using multiple TCI states / spatial relationships, multiple TRPs activated through RRC / DCI, multiple TCI states / spatial relationships activated through RRC / DCI, multiple TRPs based on a single DCI, and at least one of multiple TRPs based on multiple DCI may also be overwritten with each other. In the present disclosure, multiple TRPs based on multiple DCIs, and CORESET pool index (CORESETPoolIndex) values ​​set to 1 for CORESET may also be overwritten with each other. In the present disclosure, multiple TRPs based on a single DCI, and at least one code point of a TCI field mapped to two TCI states may also be overwritten with each other.

[0153] In the present disclosure, single TRP, single DCI, single PDCCH, multiple TRPs based on single DCI, single TRP system, single TRP transmission, single PDSCH, channels using single TRP, channels using one TCI state / spatial relationship, multiple TRPs are not activated through RRC / DCI, multiple TCI states / spatial relationships are not activated through RRC / DCI, the CORESET pool index (CORESETPoolIndex) value is not set to 1 for any CORESET and any code point of the TCI field is not mapped to two TCI states, and two TCI states on at least one TCI code point activated can also overwrite each other.

[0154] In the present disclosure, TRP#1 (first TRP) may correspond to either CORESET pool index = 0 or the first TCI state of two TCI states corresponding to a code point of the TCI field. TRP#2 (second TRP) may correspond to either CORESET pool index = 1 or the second TCI state of two TCI states corresponding to a code point of the TCI field.

[0155] In the present disclosure, CORESET0, CORESET with index 0, and public CORESET can also overwrite each other.

[0156] In addition, in the present disclosure, signaling structure, signaling, setting, structure, setting information, indication, indication information, etc. can also be rewritten mutually.

[0157] In the present disclosure, BFR, BFR setting, BFR process, BFD, BFD process, BFD-RS, BFD-RS setting, RLM, RLM setting, RLM process, RLM-RS, RLM-RS setting, NBI, NBI setting, NBI-RS, and NBI-RS setting can also be rewritten with each other. In the present disclosure, the BFR per cell, cell-specific BFR, and BFR of Rel. 15 / 16 can also be rewritten with each other. In the present disclosure, the BFR per TRP, TRP-specific BFR, and BFR after Rel. 17 / Rel. 17 can also be rewritten with each other.

[0158] In the following embodiments of the present disclosure, the case where the maximum number of BFD-RS sets and NBI-RS sets is 2 is described, but these numbers can also be 2 or more, and "two" can also be rewritten as "multiple".

[0159] (Wireless communication method)

[0160] For a serving cell (or each BWP of the serving cell), the UE can also be configured with a set of reference signals for beam failure detection (e.g., BFD-RS) / a set of reference signals for candidate beams (e.g., NBI-RS).

[0161] <Setting of BFD-RS / NBI-RS in per-cell BFR>

[0162] For each BWP of the serving cell, the UE can also be provided with a set q of BFD-RS (e.g., periodic CSI-RS resource setting index) through a higher layer parameter (e.g., failureDetectionResourcesToAddModList). 0 In addition, the UE can also be provided with a set q of NBI-RS (e.g., at least one of a periodic CSI-RS resource setting index and an SS / PBCH block index) through a higher layer parameter (e.g., candidateBeamRSList, candidateBeamRSListExt, or candidateBeamRSSCellList) for wireless link quality measurement in the BWP of the serving cell. 1 .

[0163] <Setting of BFD-RS / NBI-RS in per-TRP BFR>

[0164] For each BWP of the serving cell, instead of set q 0 and set q 1, the UE may also be provided with two sets of BFD-RS (eg, periodic CSI-RS resource setting index) q 0,0 and the set q 0,1 In addition, the UE may also be provided with the set q respectively through the high-level parameters (eg, candidateBeamRSList1 and candidateBeamRSList2) for radio link quality measurement in the BWP of the serving cell. 0,0 and the set q 0,1 The set q of two corresponding NBI-RS (e.g., at least one of the periodic CSI-RS resource setting index and the SS / PBCH block index) 1,0 and the set q 1,1 . BFD-RS set q 0,0 Can also be combined with NBI-RS 1,0 To associate, BFD-RS set q 0,1 Can also be combined with NBI-RS 1,1 Make an association.

[0165] Two sets q of BFD-RS (e.g., periodic CSI-RS resource setting index) 0,0 and the set q 0,1 It may be set through higher-level parameters related to beam failure detection resources (for example, set separately) or may be set through other higher-level parameters (for example, set separately).

[0166] In addition, the two sets q of BFD-RS 0,0 and the set q 0,1 It can also be a set q where no BFD-RS is provided 0 Alternatively, it can also be a structure provided in which two sets of BFD-RS are provided. 0,0 and the set q 0,1 In the case of no BFD-RS set q 0 structure.

[0167] <First Embodiment>

[0168] In the first embodiment, an example of beam update control after BFR ends (or after receiving a BFR response) when a cell (or BWP of a cell) supports multiple TRPs based on a single DCI and BFR in TRP units is applied is described.

[0169] The case where multiple TRPs based on a single DCI are applied may also be a case where the indication of two TCI states is supported through the TCI field of DCI, or a case where a specific MAC CE is applied to indicate one or two TCI states for a code point in the TCI field of DCI (for example, Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE).

[0170] In addition, when multiple TRPs based on a single DCI are applied, the CORESET pool index may not be set or only a specific CORESET pool index (for example, 0) may be set.

[0171] In addition, when multiple TRPs based on multiple DCIs are applied, two CORESET pool indexes (e.g., 0 and 1) may also be set. In this case, a CORESET that is not indexed (or a CORESET other than CORESET pool index 1) may also be equivalent to CORESET pool index 0.

[0172] For a UE, multiple (e.g., two) BFD-RS sets may be configured for a TRP unit (or a BFR of a TRP unit). For example, two sets of BFD-RS (e.g., periodic CSI-RS resource setting index) q 0,0 and the set q 0,1 It can also be provided to the UE through higher layer parameters.

[0173] In addition, a set of two NBI-RSs (eg, at least one of a periodic CSI-RS resource setting index and a SS / PBCH block index) may also be provided to the UE. 1,0 and the set q 1,1 . NBI-RS set q 1,0 It can also be combined with BFD-RS set q 0,0 To associate, NBI-RS set q 1,1 It can also be combined with BFD-RS set q 0,1 Make an association.

[0174] In addition, the NBI-RS set q 1,0 and BFD-RS set q 0,0 It can also be associated with the first TRP#1, NBI-RS set q 1,1 and BFD-RS set q 0,1 It can also be associated with the second TRP#2.

[0175] In addition, the association between the TCI state of the CORESET (e.g., the activated TCI state) and the BFD-RS set (the BFD-RS set explicitly set by RRC) may also be supported. 1,0 / BFD-RS set q 0,0 , and NBI-RS set q 1,1 / BFD-RS set q 0,1 At least one of the CORESET and the activated TCI state of the CORESET may also be associated with the UE. Information about the association may also be set / indicated to the UE from the base station via a higher layer parameter / MAC CE / DCI.

[0176] In a single DCI based multi-TRP, when DCI (or PDCCH / CORESET) is transmitted from the first TRP#1, the NBI-RS set q 1,0 / BFD-RS set q 0,0 It can also be associated with a CORESET (or the activated TCI state of a CORESET) (see Figure 3A ). Alternatively, in a multi-TRP based on a single DCI, when DCI (or PDCCH / CORESET) is sent from the second TRP#2, the NBI-RS set q 1,1 / BFD-RS set q 0,1 It can also be associated with a CORESET (or the activated TCI state of a CORESET) (see Figure 3B ).

[0177] In a multi-DCI based TRP, the NBI-RS set q 1,0 / BFD-RS set q 0,0 It can also be associated with the first CORESET (e.g., CORESET pool index 0) (see Figure 4A ), NBI-RS set q 1,1 / BFD-RS set q 0,1 It can also be associated with a second CORESET (e.g., CORESET pool index 1) (see Figure 4B ).

[0178] In multiple TRPs based on a single DCI, when two BFD-RS sets are set for each TRP (or TRP BFR), the UE supports updating the DL beam of the PDCCH (or CORESET) associated with the BFD-RS set where beam failure is detected after receiving the BFR response (or after the BFR ends).

[0179] For example, suppose that CORESET (or the TCI state of CORESET) and NBI-RS set q 1,0 / BFD-RS set q 0,0 When the associated Figure 5 ). In this case, the UE may also decide whether to update the beam for the CORESET based on the BFR-RS set where the beam failure is detected (for example, depending on whether the BFD-RS set is associated with the CORESET (or the activated TCI state of the CORESET)).

[0180] For example, when the BFD-RS set q is detected 0,0 In the case of beam failure (or when the NBI-RS set q is reported 1,0 In the case of a specific RS index included in the BFR response, the UE may also, after a specific period of time has passed since the UE received the BFR response, determine the CORESET (or the TCI state of the CORESET) and the q 1,0 and q 0,0 At least one associated CORESET assumes that the antenna port quasi-co-location parameters corresponding to qnew (refer to Figure 5 ). qnew can also be derived from q 1,0 The RS index selected in (e.g., the specific RS index reported).

[0181] In addition, Figure 5 In the case of detecting the BFD-RS set q 0,1 In the case of beam failure (or when the NBI-RS set q is reported 1,1 In the case of a specific RS index included in qnew, the UE may not update the DL beam of the PDCCH (or CORESET). In addition, after a specific period has passed since the BFR response was received, the UE may also assume the antenna port quasi-co-location parameters corresponding to qnew for other channels / signals other than PDCCH. qnew may also be from q 1,1 The RS index selected in (e.g., the specific RS index reported).

[0182] In this way, when the PDCCH (or CORESET) associated with the BFD-RS set in which beam failure is detected does not exist, the DL beam of the PDCCH (or CORESET) may not be updated. By determining whether the beam update of the PDCCH / CORESET is performed based on the CORESET and the BFD-RS set (or NBI-RS set) in which beam failure is detected, the beam update of the PDCCH / CORESET can be appropriately performed even when multiple TRPs based on a single DCI are applied.

[0183] More specifically, the UE operation may also be controlled as follows.

[0184] Set q 0,0 and q 1,0 , and the set q 0,1 and q 1,1 is associated, for wireless link quality below a certain value (Q out,LR ) in the serving cell, after the BFR process, after a specific period (for example, 28 code elements) starting from the time when the response signal from the base station is received, the UE performs at least one of the following UE operations 1 to 4.

[0185] In addition, a specific period (for example, 28 code elements) after receiving the response signal from the base station may also be 28 code elements after the last code element of the first (or initial) PDCCH reception having a DCI format, where the DCI format is a DCI format that schedules a PUSCH with the same HARQ process number as the second PUSCH transmission and has a toggled NDI field value.

[0186] 《UE Operation 1》

[0187] UE for the first CORESET, the idea comes from q 1,0 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0188] 《UE Operation 2》

[0189] UE for the second CORESET, assuming from q 1,1 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0190] 《UE Operation 3》

[0191] UE activates TCI state and q 1,0 The associated CORESET (if set), assuming that from q 1,0 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0192] 《UE Operation 4》

[0193] UE activates TCI state and q 1,1 The associated CORESET (if set), assuming that from q 1,1 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0194] UE operation 1 / 2 may also be applied for multiple TRPs based on multiple DCIs. The first CORESET in UE operation 1 may also correspond to COTESET pool index 0. The second CORESET in UE operation 2 may also correspond to COTESET pool index 1.

[0195] UE operation 3 / 4 can also be applied for multiple TRPs based on a single DCI.

[0196] In this way, by separately defining / setting the beam update operation after BFR for multi-TRP based on multi-DCI and multi-TRP based on single DCI, appropriate beam update can be performed according to each transmission type.

[0197] [Modification 1]

[0198] UE operation 3 / 4 may also be as follows.

[0199] 《UE Operation 3A》

[0200] UE activates TCI state and q 0,0 The associated CORESET (if set), assuming that from q 1,0 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0201] 《UE Operation 4A》

[0202] UE activates TCI state and q 0,1 The associated CORESET (if set), assuming that from q 1,1 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0203] In multi-TRP based on single DCI, the UE can also control the update of the beam for CORESET based on the association between the activated TCI state of CORESET and the BFD-RS set.

[0204] [Modification 2]

[0205] UE operation 3 / 4 may also be as follows.

[0206] 《UE Operation 3B》

[0207] UE is aimed at 0,0 The associated CORESET (if set), assuming that from q 1,0 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0208] 《UE Operation 4B》

[0209] UE is aimed at0,1 The associated CORESET (if set), assuming that from q 1,1 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0210] In multiple TRPs based on a single DCI, the UE can also control the update of the beam for the CORESET based on the association between the CORESET and the BFD-RS set.

[0211] [Variation 3]

[0212] UE operation 3 / 4 may also be as follows.

[0213] 《UE Operation 3C》

[0214] UE is aimed at 1,0 The associated CORESET (if set), assuming that from q 1,0 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0215] 《UE Operation 4C》

[0216] UE is aimed at 1,1 The associated CORESET (if set), assuming that from q 1,1 The quasi-co-location parameters of the antenna port corresponding to qnew (if any).

[0217] In multiple TRPs based on a single DCI, the UE can also control the update of the beam for the CORESET based on the association between the CORESET and the NBI-RS set.

[0218] (appendix)

[0219] Regarding one embodiment of the present disclosure, the following invention is appended.

[0220] [Appendix 1]

[0221] A terminal comprises: a receiving unit, which receives information related to multiple reference signal sets for beam failure detection and information related to multiple reference signal sets for candidate beams; and a control unit, which controls so that when an indication of two TCI states is supported by the transmission configuration indicator (TCI) field of the downlink control information, after receiving a response signal for beam failure recovery, the assumption of quasi-co-location parameters of the antenna port is updated for a control resource set associated with at least the reference signal set in which the beam failure was detected.

[0222] [Appendix 2]

[0223] A terminal as described in Appendix 1, wherein the control unit controls the update of the quasi-co-site parameters of the antenna port based on the reference signal index contained in the specific candidate beam for a control resource set that associates the activated TCI state with a reference signal set for a specific candidate beam.

[0224] [Appendix 3]

[0225] A terminal as described in Appendix 1 or Appendix 2, wherein the activated TCI state of the control resource set is associated with at least one of a reference signal set for specific beam failure detection and a reference signal set for specific candidate beams.

[0226] [Appendix 4]

[0227] A terminal as described in any one of Appendix 1 to Appendix 3, wherein the control resource set is associated with at least one of a reference signal set for specific beam failure detection and a reference signal set for specific candidate beams.

[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 6 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 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 base stations 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 these. For example, FR1 may also be equivalent 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 via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (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 (relay) 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 used as the radio access schemes for UL and DL.

[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, 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 as uplink channels.

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

[0246] The PDCCH may also transmit lower layer control information. 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 for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as 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 rewritten mutually.

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

[0251] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “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, 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 as DL-RS.

[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] Figure 7 1 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 in 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 also 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 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 common 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 as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0262] The transmitting / receiving antenna 130 can be constituted by an antenna described based on 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 and control information 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 (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (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 also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0268] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also 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 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 (Received Signal 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 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 transmit information on a plurality of reference signal sets for beam failure detection and information on a plurality of reference signal sets for candidate beams.

[0274] The control unit 110 can also control so that when the transmission configuration indicator (TCI) field of the downlink control information supports the indication of two TCI states, after sending a response signal for beam failure recovery, the antenna port quasi-co-location parameters are updated for a control resource set that is associated with at least a reference signal set in which the beam failure was detected.

[0275] (User Terminal)

[0276] Figure 82 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 transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0277] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable 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.

[0278] 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 common knowledge in the technical field to which the present disclosure relates.

[0279] 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.

[0280] 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 common knowledge in the technical field involved in the present disclosure.

[0281] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0282] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0283] 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.

[0284] 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.

[0285] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0286] 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.

[0287] 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 valid (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.

[0288] 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 .

[0289] 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 .

[0290] 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 obtained baseband signal to obtain user data, etc.

[0291] 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.

[0292] 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 and the transmitting and receiving antenna 230 .

[0293] The transmitting and receiving unit 220 may receive information on a plurality of reference signal sets for beam failure detection and information on a plurality of reference signal sets for candidate beams.

[0294] The control unit 210 can also control so that when the transmission configuration indicator (TCI) field of the downlink control information supports the indication of two TCI states, after receiving the response signal of beam failure recovery, the antenna port quasi-co-location parameters are updated for the control resource set associated with at least the reference signal set in which the beam failure was detected.

[0295] The control unit 210 may also control the update of the quasi-co-site parameters of the antenna port based on the reference signal index contained in the specific candidate beam for the control resource set in which the activated TCI state is associated with the reference signal set for the specific candidate beam.

[0296] The activated TCI state of the control resource set may also be associated with a specific reference signal set for beam failure detection and at least one of a specific reference signal set for candidate beams. The control resource set may also be associated with a specific reference signal set for beam failure detection and at least one of a specific reference signal set for candidate beams.

[0297] (Hardware Structure)

[0298] 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.

[0299] 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.

[0300] 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. 9 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0301] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be interchangeably used. 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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 causes 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.

[0306] 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.

[0307] 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 (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 suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0308] 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 may 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. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0309] 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).

[0310] 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 may be configured as different buses between the devices.

[0311] 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.

[0312] (Variation Example)

[0313] 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 rewritten 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.

[0314] 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. Furthermore, 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).

[0315] Here, the parameter set may also be 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 a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0316] 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.

[0317] 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.

[0318] 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 replaced with each other.

[0319] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0320] 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.

[0321] 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 be shorter than the TTI.

[0322] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0323] 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.

[0324] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than that of the long TTI and longer than 1 ms.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0329] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0330] 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.

[0331] At least one of the set BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0332] 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.

[0333] 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.

[0334] In the present disclosure, the names used for parameters, etc. are not restrictive 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 restrictive in all respects.

[0335] Information, signals, etc. described in this 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.

[0336] 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.

[0337] 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.

[0338] 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.

[0339] 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)).

[0340] 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).

[0341] 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).

[0342] 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.

[0343] 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.

[0344] 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.

[0345] 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.

[0346] 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.

[0347] 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.

[0348] In the present disclosure, the base station sending information to the terminal may also rewrite the base station instructing the terminal to perform control / action based on the information.

[0349] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0350] 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 several other appropriate terms.

[0351] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, a moving object body, etc.

[0352] The mobile body refers to a movable object, and the moving speed is arbitrary, and of course it also includes the situation where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, automatic two-wheeled vehicles, bicycles, networked cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trailers, rickshaws, ships (ships and other watercrafts), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quadcopters, balloons and objects carried by them, and are not limited to these. In addition, the mobile body can also be a mobile body that moves autonomously based on operating instructions.

[0353] The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous 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 communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0354] Fig.10 1 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0355] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handlebar), and performs steering of at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0356] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an ECU (Electronic Control Unit).

[0357] The signals from the various sensors 50-58 include a current signal from a current sensor 50 for sensing the current of the motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58, and the like.

[0358] The information service unit 59 is composed of various devices such as a car navigation system, an audio system, a speaker, a display, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from an external device via the communication module 60, etc. to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0359] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0360] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents before they happen or reducing the driver's driving load, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning device (for example, Global Navigation Satellite System (GNSS)), map information (for example, high-precision (High Definition (HD))) map, autonomous vehicle (Autonomous Vehicle (AV)) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS))), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 and realizes driving assistance function or autonomous driving function.

[0361] The communication module 60 can communicate with the microprocessor 61 and the components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 of the vehicle 40 via the communication port 63.

[0362] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received between external devices via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0363] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted through the communication module 60 may also include information based on the above input.

[0364] The communication module 60 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) transmitted from an external device, and displays it to the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit for outputting information (for example, outputting information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0365] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40 based on the information stored in the memory 62.

[0366] In addition, the base station in the present disclosure may also be rewritten as 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", "downlink", etc. may also be rewritten as terms corresponding to communication between terminals (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0367] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0368] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) 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 the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0369] 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.

[0370] 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 (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 based on these enhancements, corrections, generation or regulations, etc. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0371] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0372] 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.

[0373] The term "determining" used in the present disclosure may include a variety of actions. 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".

[0374] 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)".

[0375] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0376] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0377] The “maximum transmit power” recorded in the present disclosure may refer to 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).

[0378] The terms "connected", "coupled", or all their variations used in this disclosure refer to 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 rewritten as "access".

[0379] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, being "connected" or "combined" to each other using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0380] 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 in the same manner as "different".

[0381] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0382] 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.

[0383] In the present disclosure, "below", "less than", "above", "more than", "equal to", etc. can also be rewritten with each other. In addition, in the present disclosure, sentences meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. can also be rewritten with each other without being limited to the original degree, comparative degree and superlative degree. In addition, in the present disclosure, sentences meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. can also be rewritten with each other as expressions attached with "ith" (i is an arbitrary integer) without being limited to the original degree, comparative degree and superlative degree (for example, "highest" can also be rewritten with "i-th highest").

[0384] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may also be replaced by each other.

[0385] 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 receiving unit that receives information related to a plurality of reference signal sets for beam failure detection and information related to a plurality of reference signal sets for candidate beams; and A control unit performs control so that when the indication of two TCI states is supported through the sending configuration indicator field, i.e., the TCI field, of the downlink control information, after receiving a response signal for beam failure recovery, the quasi-co-location parameters of the antenna port are updated for a control resource set associated with at least a reference signal set in which the beam failure was detected.

2. The terminal according to claim 1, wherein: The control unit controls the update of the quasi-co-location parameters of the antenna port based on the reference signal index contained in the specific candidate beam for the control resource set that associates the activated TCI state with the reference signal set for the specific candidate beam.

3. The terminal according to claim 1, wherein: The activated TCI state of the control resource set is associated with at least one of a specific reference signal set for beam failure detection and a specific reference signal set for candidate beams.

4. The terminal according to claim 1, wherein: The control resource set is associated with at least one of a specific reference signal set for beam failure detection and a specific reference signal set for candidate beams.

5. A wireless communication method of a terminal, comprising: receiving information related to a plurality of reference signal sets for beam failure detection and information related to a plurality of reference signal sets for candidate beams; and Control is performed so that when the transmission configuration indicator field, i.e., the TCI field, of the downlink control information supports indications of two TCI states, after receiving a response signal for beam failure recovery, the quasi-co-location parameters of the antenna port are updated for a control resource set associated with at least a reference signal set in which the beam failure was detected.

6. A base station, comprising: a transmitting unit, transmitting information related to a plurality of reference signal sets for beam failure detection and information related to a plurality of reference signal sets for candidate beams; and A control unit performs control so that when the indication of two TCI states is supported through the sending configuration indicator field, i.e., the TCI field, of the downlink control information, after sending a response signal for beam failure recovery, the antenna port quasi-co-location parameters are updated for a control resource set associated with at least a reference signal set in which the beam failure is detected.

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