Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a reception unit that receives downlink control information indicating that a transmission configuration indication state, that is, a TCI state, is group-common, and a control unit that controls transmission of feedback information indicating success or failure of reception of the downlink control information. According to one embodiment of the present disclosure, information related to QCL can be appropriately determined.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300V8.12.0 "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] The problem that the invention aims to solve

[0008] In future wireless communication systems (e.g., NR), research is underway on how user terminals (terminals, user equipment (UE)) control transmission and reception processes based on information related to quasi-co-location (QCL) (QCL concept / transmission configuration indication (TCI) status / spatial relationship).

[0009] However, there are situations where information related to QCL is unclear. If this information is unclear, there are concerns that it may lead to reduced communication quality and lower throughput.

[0010] Therefore, one of the purposes of this disclosure is to provide a terminal, a wireless communication method, and a base station for appropriately determining information related to QCL.

[0011] Methods for solving problems

[0012] One aspect of this disclosure relates to a terminal comprising: a receiving unit for receiving group common downlink control information indicating a transmission setting indication state, i.e., a TCI state; and a control unit for controlling the transmission of feedback information indicating success or failure of receiving the downlink control information.

[0013] Invention Effects

[0014] According to one method disclosed herein, information related to QCL can be appropriately determined. Attached Figure Description

[0015] Figure 1 This diagram illustrates an example of the common beam used by both DL and UL.

[0016] Figure 2 This diagram illustrates an example of the common beam used by DL and the common beam used by UL.

[0017] Figure 3 This is a diagram illustrating one example of use case 0.

[0018] Figure 4 This is a diagram illustrating an example of use case 1.

[0019] Figure 5 This is a diagram illustrating one example of use case 2.

[0020] Figure 6 This is a diagram illustrating an example of the TCI status for a UE group.

[0021] Figure 7 This is a diagram illustrating an example of setting 1 as described in the first embodiment.

[0022] Figure 8 This is a diagram illustrating an example of setting 2 as described in the first embodiment.

[0023] Figure 9A as well as Figure 9B This is a diagram illustrating an example of an update to the TCI concept involved in the first embodiment.

[0024] Figure 10A as well as Figure 10B This is a diagram illustrating an example of successful / failed reception of a group of public DCI devices.

[0025] Figure 11 This is a diagram illustrating an example of the PUCCH resource settings involved in mode 3-1.

[0026] Figure 12 This is a diagram illustrating an example of the PUCCH resource settings involved in mode 3-2.

[0027] Figure 13A as well as Figure 13B This is a diagram illustrating an example of a group of public PUCCH resources.

[0028] Figure 14 This is a diagram illustrating an example of the operations involved in mode 3-3.

[0029] Figure 15 This is a diagram illustrating an example of the operations involved in methods 3-4.

[0030] Figure 16 This is a diagram illustrating an example of the operation involved in the fourth embodiment.

[0031] Figure 17 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0032] Figure 18 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0033] Figure 19 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0034] Figure 20 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0035] (TCI, Spatial Relations, QCL)

[0036] In NR, research is underway on controlling the reception processing (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) of at least one of the signals and channels (referred to as signal / channel) in the UE based on the Transmission Configuration Indication state (TCI state).

[0037] TCI states can also represent the states of signals / channels applied to the downlink. States equivalent to the TCI states of signals / channels applied to the uplink can also be described as spatial relations.

[0038] TCI status is information related to the quasi-co-location (QCL) of signals / channels, and can also be referred to as spatial reception parameters, spatial relation information, etc. TCI status can also be set to the UE on a per-channel or per-signal basis.

[0039] QCL is an indicator of the statistical properties of a signal / channel. For example, it can also mean that, given a QCL relationship between a signal / channel and other signals / channels, it can be assumed that at least one of the following is the same (QCL): Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0040] Additionally, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive 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 this disclosure may also be replaced with sQCL (spatial QCL).

[0041] Regarding QCL, multiple types (QCL types) can also be specified. For example, four QCL types AD can be set, in which the parameters (or parameter sets) that can be assumed to be the same are different. The parameters (also referred to as QCL parameters) are represented as follows:

[0042] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread.

[0043] • QCL Type B (QCL-B): Doppler shift and Doppler extension.

[0044] • QCL Type C (QCL-C): Doppler shift and average delay,

[0045] • QCL type D (QCL-D): Space reception parameters.

[0046] The situation in which a UE envisions a relationship between a certain Control Resource Set (CORESET), a channel, or a reference signal and other CORESETs, channels, or reference signals in a specific QCL (e.g., QCL type D) can also be referred to as a QCL assumption.

[0047] 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 state or QCL assumption of the signal / channel.

[0048] TCI status can also be, for example, information related to the QCL between the target channel (in other words, the reference signal (RS) used by the channel) and other signals (e.g., other RS). TCI status can also be set (indicated) by higher-layer signaling, physical-layer signaling, or a combination thereof.

[0049] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0050] The channel that is set (specified) to TCI state or spatial relationship can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0051] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also known as a Tracking Reference Signal (TRS)), or a QCL Detection Reference Signal (also known as a QRS).

[0052] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0053] The RS of QCL type X in TCI state can also refer to the RS that is in a relationship of QCL type X with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0054] (Path Loss RS)

[0055] Path loss PL under transmit power control for PUSCH, PUCCH, and SRS respectively b,f,c (q d [dB] is the index q of the reference signal (RS, Path Loss Reference RS) used by the UE to associate with the active UL BWP b of the carrier f of the serving cell c. d And is calculated. In this disclosure, path loss reference RS, pathloss(PL)-RS, index q d The RS used in path loss calculation and the RS resources used in path loss calculation can also be substituted for each other. In this disclosure, calculation, estimation, measurement, and tracking can also be substituted for each other.

[0056] We are investigating whether to update the existing mechanism for the higher layer filtered RSRP (RSRP for path loss measurement) when the path loss RS is updated via MAC CE.

[0057] When the path loss RS is updated via MAC CE, path loss measurement based on L1-RSRP can also be applied. The higher-layer filter RSRP can also be used for path loss measurement at a timing available after the MAC CE for updating the path loss RS, prior to which L1-RSRP was used for path loss measurement. Similarly, the higher-layer filter RSRP can also be used for path loss measurement at a timing available after the MAC CE for updating the path loss RS, prior to which the higher-layer filter RSRP of the previous path loss RS was used. Similar to the operation in Rel.15, the higher-layer filter RSRP can also be used for path loss measurement, and the UE can also track all path loss RS candidates set via RRC. The maximum number of path loss RS that can be set via RRC can also depend on the UE's capabilities. When the maximum number of path loss RS that can be set via RRC is X, path loss RS candidates below X can also be set via RRC, and the path loss RS is selected via MAC CE from the set path loss RS candidates. The maximum number of path loss RS that can be set via RRC can be 4, 8, 16, 64, etc.

[0058] In this disclosure, the higher layer filter RSRP, the filtered RSRP, and the layer 3 filter RSRP (layer 3 filtered RSRP) can also be used interchangeably.

[0059] (Default TCI status / Default spatial relationship / Default PL-RS)

[0060] In RRC connection mode, in both the case where the TCI information within the DCI (higher-layer parameter TCI-PresentInDCI) is set to "enabled" and the case where the TCI information within the DCI is not set, if the time offset between the reception of the DL DCI (the DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH scheduled through this DCI) is less than a threshold (timeDurationForQCL) (application condition, first condition), then, in the case of non-cross-carrier scheduling, the TCI state of the PDSCH (default TCI state) can also be the TCI state of the lowest CORESET ID in the latest time slot within the active DL BWP of the CC (for that specific UL signal). Otherwise, the TCI state of the PDSCH (default TCI state) can also be the TCI state of the lowest TCI state ID of the PDSCH within the active DL BWP of the scheduled CC.

[0061] In Rel.15, each MAC CE is required for the activation / deactivation of the PUSCH spatial relation and the activation / deactivation of the SRS spatial relation. The PUSCH spatial relation follows the SRS spatial relation.

[0062] In Rel.16, at least one of the MAC CEs for activation / deactivation of PUCCH spatial relations and SRS spatial relations may not be used.

[0063] If no spatial relationship and PL-RS are set for PUCCH in FR2 (application condition, second condition), the default assumptions for the applied spatial relationship and PL-RS for PUCCH are (default spatial relationship and default PL-RS). If no spatial relationship and PL-RS are set for SRS (for SRS resources or SRS resources corresponding to SRIs within DCI format 0_1 ​​for scheduling PUSCH) in FR2 (application condition, second condition), the default assumptions for the applied spatial relationship and PL-RS for PUSCH and SRS scheduled through DCI format 0_1 ​​are (default spatial relationship and default PL-RS).

[0064] If a CORESET is set within the active DL BWP on this CC (application condition), the default spatial relationship and default PL-RS can also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID within the active DL BWP. If no CORESET is set within the active DL BWP on this CC, the default spatial relationship and default PL-RS can also be the active TCI state of the PDSCH with the lowest ID within the active DL BWP.

[0065] In Rel.15, the spatial relationships of PUSCHs scheduled via DCI format 0_0 follow the spatial relationships of the PUCCH resources with the lowest PUCCH resource ID in the active spatial relationships of PUCCHs on the same CC. Even if no PUCCH is sent on a SCell, the network needs to update the PUCCH spatial relationships on all SCells.

[0066] In Rel.16, the PUCCH setting for PUSCHs scheduled via DCI format 0_0 is not required. For PUSCHs scheduled via DCI format 0_0, if there is no active PUCCH space relation or no PUCCH resource on the active UL BWP within that CC (application condition, second condition), the default space relation and default PL-RS are applied to that PUSCH.

[0067] The application conditions for SRS using the default spatial relationship / default PL-RS can also include the case where the SRS default beam path loss activation information element (higher-layer parameter enableDefaultBeamPlForSRS) is set to valid. Similarly, the application conditions for PUCCH using the default spatial relationship / default PL-RS can also include the case where the PUCCH default beam path loss activation information element (higher-layer parameter enableDefaultBeamPlForPUCCH) is set to valid. Furthermore, the application conditions for PUSCH scheduled via DCI format 0_0 using the default spatial relationship / default PL-RS can also include the case where the PUSCH scheduled via DCI format 0_0 has the default beam path loss activation information element (higher-layer parameter enableDefaultBeamPlForPUSCH0_0) set to valid.

[0068] The aforementioned thresholds can also be referred to as QCL time duration, "timeDurationForQCL", "threshold", "threshold for offset between a DCI indicating a TCIstate and a PDSCH scheduled by the DCI", "threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0069] (Multiple TRPs)

[0070] In NR, research is underway on using one or more Transmission / Reception Points (TRPs) (multi-TRPs (MTRPs)) with one or more panels (multi-panel) to perform DL transmission to the UE. Additionally, research is underway on the UE using one or more panels to perform UL transmission to one or more TRPs.

[0071] Furthermore, multiple TRPs can correspond to the same cell identifier (cell Identifier(ID)) or different cell IDs. This cell ID can be either a physical cell ID or a virtual cell ID.

[0072] Multiple TRPs (e.g., TRP #1, #2) can also be connected via ideal / non-ideal backhaul and exchange information, data, etc. Different codewords (CWs) and different layers can also be sent from each TRP within a multi-TRP network. As a method of multi-TRP transmission, non-coherent joint transmission (NCJT) can also be used.

[0073] In NCJT, for example, TRP#1 performs modulation mapping on the first codeword and layer mapping, and transmits the first PDSCH using the first precoding for a first number of layers (e.g., two layers). Furthermore, TRP#2 performs modulation mapping on the second codeword and layer mapping, and transmits the second PDSCH using the second precoding for a second number of layers (e.g., two layers).

[0074] Furthermore, multiple PDSCHs (multiple PDSCHs) of NCJT can also be defined as partially or completely overlapping in terms of at least one of the time domain and frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP can also overlap.

[0075] It can also be envisioned that these first PDSCHs and second PDSCHs are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0076] Multiple PDSCHs from multiple TRPs (also known as multiple PDSCHs) can be scheduled using a single DCI (single DCI, single PDCCH) (single-master mode, single-DCI based multi-TRP). Alternatively, multiple PDSCHs from multiple TRPs can be scheduled separately using multiple DCIs (multiple DCI, multiple PDCCHs) (multi-master mode, multi-DCI based multi-TRP).

[0077] In such a multi-TRP scenario, more flexible transmission control is possible when using high-quality channels.

[0078] To support multi-TRP transmission within a cell (with the same cell ID) and between cells (with different cell IDs) based on multiple PDCCHs, a control resource set (CORESET) within the PDCCH configuration information (PDCCH-Config) can also correspond to a TRP in the RRC configuration information used to link multiple pairs of PDCCHs and PDSCHs with multiple TRPs.

[0079] (Unified / Common TCI Framework)

[0080] According to the unified TCI framework, the channels of UL and DL can be controlled through a common framework. Regarding the unified TCI framework, instead of specifying TCI states or spatial relationships for each channel as in Rel.15, it can both indicate a common beam and apply it to all channels of UL and DL, or apply the common beam used by UL to all channels of UL, and apply the common beam used by DL to all channels of DL.

[0081] We are researching a common beam for both DL and UL, or a common beam for DL ​​and a common beam for UL (integrated as two common beams).

[0082] The UE can also envision the same TCI state (joint TCI state, joint TCI state pool) for UL and DL.

[0083] exist Figure 1 In the example, RRC sets multiple TCI states (joint common TCI state pool) for both DL and UL. Each of the multiple TCI states can also be SSB, CSI-RS, or SRS. MAC CE can also activate a portion of the set multiple TCI states. DCI can also indicate at least one of the activated multiple TCI states.

[0084] MAC CE-based beam management can also be used to ensure that the default beams of UL and DL are consistent. The default TCI state of PDSCH can also be updated to match the default UL beam (spatial relationship).

[0085] Alternatively, a common beam / unified TCI state can be indicated from the same TCI state pool (joint common TCI state pool) used by both UL and DL through DCI-based beam management. M (>1) TCI states can also be activated via MAC CE. UL / DL DCI can also select one from the M activated TCI states. The selected TCI state can also be applied to the channels / RS of both UL and DL.

[0086] The UE can also envision different TCI states for UL and DL respectively (independent TCI state, independent TCI state pool, UL independent TCI state pool and DL independent TCI state pool, UL common TCI state pool and DL common TCI state pool).

[0087] exist Figure 2 In the example, RRC (parameters, information elements) can also set multiple TCI states (pools) for UL and DL channels respectively.

[0088] The MAC CE can also select (activate) one or more (e.g., multiple) TCI states (sets) for both the UL and DL channels. The MAC CE can also activate two sets of TCI states.

[0089] The DL DCI can also select (indicate) more than one (e.g., one) TCI state. This TCI state can also be applied to more than one DL channel. The DL channel can also be PDCCH / PDSCH / CSI-RS. The UE can also use the Rel.16 TCI state operation (TCI framework) to determine the TCI state of each DL channel / RS.

[0090] The UL DCI can also select (indicate) more than one (e.g., one) TCI state. This TCI state can also be applied to more than one UL channel. The UL channel can also be PUSCH / SRS / PUCCH.

[0091] As an independent public TCI state pool, the following use cases 0, 1, and 2 are being studied.

[0092] [Use Case 0]

[0093] The UE uses different UL beams due to the Maximum Permitted Exposure (MPE).

[0094] exist Figure 3 In the example, panel #1's UL is affected by an MPE issue, and the UE uses panel #2 in the UL.

[0095] [Use Case 1]

[0096] The UE uses different UL beams due to the different UL signal strengths.

[0097] exist Figure 4 In this example, the distance between the UE and TRP (cell, base station) #1 is longer than the distance between the UE and TRP #2. Here, the L1-RSRP of panel #1 is higher than that of panel #2, and the UL transmit power of panel #2 is higher than that of panel #1. The UE uses panel #1 in the DL from TRP #1 and uses panel #2 in the UL to TRP #2.

[0098] [Use Case 2]

[0099] The UE uses different UL beams due to UL load balancing.

[0100] exist Figure 5In the example, panel #1 has a higher L1-RSRP than panel #2, and panel #2 has a lower UL load than panel #1. The UE uses panel #1 in the DL from TRP #1 and panel #2 in the UL to TRP #2.

[0101] Consider studying more scenarios with different requirements. For example, in multi-TRP transmission, high-speed rail (high-speed train (HST)) transmission, and inter-cell mobility during which the UE may connect to two cells, the common beam for each TRP and cell can also be different.

[0102] In this case, the UE can also have multiple panels for FR2. In this case, the common beam for each UE panel can also be different.

[0103] like Figure 6 As in the example, in mobile vehicles such as buses / trains / cars, consider the scenario of multiple UEs, and the overhead of PDCCH increases due to dedicated signaling for TCI states.

[0104] In a unified / common TCI state, to avoid inconsistencies between the UE and the base station during PDCCH beam updates, the UE applies the beam indication after sending the HARQ-ACK corresponding to the DCI indication. This means the base station needs to send the following two PDCCH transmissions.

[0105] [PDCCH sent 1]

[0106] Update of the common beam.

[0107] [PDCCH sent 2]

[0108] PDSCH scheduling.

[0109] If the overhead of PDCCH increases, there are concerns that it may lead to a decrease in throughput.

[0110] Therefore, the inventors of this invention conceived of a method for indicating the TCI state.

[0111] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0112] In this disclosure, "A / B / C" and "at least one of A, B, and C" can be substituted for each other. In this disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, activated DL BWP, activated UL BWP, and band domain can also be substituted for each other. In this disclosure, index, ID, indicator, and resource ID can also be substituted for each other. In this disclosure, support, control, capable of control, operation, and capable of operation can also be substituted for each other.

[0113] In this disclosure, configure, activate, update, indicate, enable, specify, and select can be used interchangeably.

[0114] In this disclosure, MAC CE and activation / deactivation commands can be used interchangeably.

[0115] In this disclosure, higher-layer signaling may be any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc. In this disclosure, RRC, RRC signaling, RRC parameters, higher layers, higher-layer parameters, RRC information elements (IEs), and RRC messages may also be used interchangeably.

[0116] MAC signaling can also use MAC Control Element (MAC CE) or MAC Protocol Data Unit (PDU). Broadcast information can also be Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), or Other System Information (OSI).

[0117] In this disclosure, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, TCI concept, QCL concept, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, RS of QCL type D in TCI state / QCL concept, RS of QCL type A in TCI state / QCL concept, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, and PL-RS can also be interchanged. In this disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, and SRS can also be interchanged.

[0118] UL DCI, DCI of scheduling UL channel (PUSCH), and DCI format 0_x (x = 0, 1, 2, ...) can also be interchanged. DL DCI, DCI of scheduling DL channel (PDSCH), and DCI format 1_x (x = 0, 1, 2, ...) can also be interchanged.

[0119] In this disclosure, HARQ-ACK messages, ACK, and NACK can be used interchangeably.

[0120] In this disclosure, single TRP, single TRP system, single TRP transmission, and single PDSCH can also be interchanged. In this disclosure, multiple TRP, multiple TRP system, multiple TRP transmission, and multiple PDSCH can also be interchanged. In this disclosure, single DCI, single PDCCH, multiple TRP based on single DCI, and two TCI states activated at least one TCI code point can also be interchanged.

[0121] In this disclosure, a single TRP, a channel using a single TRP, a channel using a single TCI state / spatial relationship, multiple TRPs not activated by RRC / DCI, multiple TCI states / spatial relationships not activated by RRC / DCI, and a CORESET pool index (CORESETPoolIndex) value not set to 1 for any CORESET and no code points in the TCI field mapped to two TCI states can also be interchanged.

[0122] In this disclosure, multiple TRPs, channels using multiple TRPs, channels using multiple TCI states / spatial relationships, multiple TRPs activated via RRC / DCI, multiple TCI states / spatial relationships activated via RRC / DCI, multiple TRPs based on a single DCI, and at least one of multiple TRPs based on multiple DCIs can be interchanged. In this disclosure, multiple TRPs based on multiple DCIs, and the CORESET pool index value set to 1 for CORESET can also be interchanged. In this disclosure, multiple TRPs based on a single DCIs, and at least one code point in the TCI field mapped to two TCI states can also be interchanged.

[0123] In this disclosure, TRP1 can correspond to either CORESET pool index = 0 or the first TCI state of two TCI states corresponding to a code point in the TCI field. TRP1 can also correspond to either CORESET pool index = 1 or the second TCI state of two TCI states corresponding to a code point in the TCI field.

[0124] In this disclosure, the link direction, downlink (DL), uplink (UL), UL, and DL can be interchanged.

[0125] In this disclosure, pool, set, group, and list can be used interchangeably.

[0126] In this disclosure, common beams, unified TCI states, beams applicable to DL and UL, beams applied to multiple channels, and PL-RS can also be interchanged.

[0127] (Wireless communication method)

[0128] The UE can also be configured with multiple TCI states (pools) applicable across multiple channels / RS via RRC information elements (TCI state information). The UE can be configured with a TCI state pool for both UL and DL (joint TCI state pool), or with both UL and DL TCI state pools (independent TCI state pools). Multiple TCI states within a TCI state pool can also be activated via MAC CE (TCI state information). The DCI can also apply one of the configured / activated TCI states, indicated by the DCI, across more than one channel / RS (signal) in UL / DL.

[0129] <First Implementation>

[0130] The group common PDCCH can also indicate the TCI state in the common TCI state for more than one UE.

[0131] If the corresponding higher-level signaling is configured, a new DCI field for the TCI status can also be introduced into the existing group common DCI (DCI formats 2_0, 2_1, 2_2, 2_3).

[0132] A new DCI format can also be introduced to indicate the TCI state in a common TCI state for more than one UE. This new DCI format (e.g., DCI format 2_x) can also have a TCI state field. The UE can also monitor the new DCI format if the corresponding higher-layer signaling is configured.

[0133] The high-level settings for unified TCI status can also follow at least one of the following settings 1 and 2.

[0134] [Setting 1]

[0135] UE-specific. Multiple UEs can use the same value in the TCI field to indicate different TCI states. Alternatively, multiple UE-specific TCI states (lists) can be set for each of the multiple UEs. These multiple TCI states can also be mapped to multiple values ​​in the TCI field. Each UE can also use the TCI state corresponding to the TCI field value from the set multiple TCI states for transmission / reception on a specific channel / RS.

[0136] exist Figure 7 In the examples, TCI states #1-1 to #1-8, corresponding to TCI field values ​​000 to 111 respectively, can also be set for UE #1. Similarly, TCI states #2-1 to #2-8, corresponding to TCI field values ​​000 to 111 respectively, can also be set for UE #2. And TCI states #3-1 to #3-8, corresponding to TCI field values ​​000 to 111 respectively, can also be set for UE #3.

[0137] [Setting 2]

[0138] The TCI state can be shared by all UEs. Multiple UEs can also use the same value in the TCI field to indicate the same TCI state. Alternatively, multiple common TCI states (lists) can be set for each of the multiple UEs. These multiple TCI states can also be individually mapped to multiple values ​​in the TCI field. Each UE can also use one of the set multiple TCI states, specifically the TCI state corresponding to the value in the TCI field, during transmission / reception on a specific channel / RS.

[0139] exist Figure 8In the example, the TCI states #1-1 to #1-8 corresponding to the TCI field values ​​000 to 111 can also be set for UE #1 to #3.

[0140] If the UE detects a group common DCI indicating the TCI status, the UE can also update the TCI assumption after a specific time from the detection of that group common DCI. Figure 9A The detection of group common DCI and the last symbol of group common DCI can also be interchanged.

[0141] If the UE detects a group common DCI indicating the TCI status, the UE can also update the TCI assumption after a specific time from the time the HARQ-ACK message is sent. Figure 9B Here, the UE can also update the TCI assumption if the HARQ-ACK information is ACK.

[0142] A specific time period can also be represented by a K symbol. K can be specified in the specification, set by a higher layer, or reported by the UE as a UE capability.

[0143] According to the first embodiment described above, the overhead of indicating the TCI state for more than one UE can be suppressed.

[0144] <Second Implementation>

[0145] It is possible that several UEs will fail to receive the group common DCI. In this case, a deviation (inconsistency, misalignment) will occur between multiple UEs / between UEs and base stations as intended by TCI.

[0146] exist Figure 10A In the example, the group common DCI for updating the unified TCI state used by both UL and DL for UEs #1 to #6 is sent to UEs #1 to #6. If UEs #1 to #6 receive the group common DCI normally, the beam is updated to the indicated unified TCI state after the indication based on the group common DCI.

[0147] exist Figure 10B In the example, UEs #3-#6, which normally receive the Group Common DCI, update their beams to the indicated Unified TCI state after receiving the Group Common DCI indication. UEs #1-#2, which fail to normally receive the Group Common DCI, do not update their beams.

[0148] If a TCI state is indicated within the group common PDCCH (DCI), each UE may also send HARQ-ACK information (feedback information) on each PUCCH / PUSCH resource that conforms to the group common DCI. The HARQ-ACK information may also indicate success (ACK) or failure (NACK) of reception / detection / decoding of the group common DCI. The PUCCH / PUSCH resources may also conform to at least one of the following resources 1 and 2.

[0149] [Resource 1]

[0150] In cases where the group public DCI has at least one of the fields of PUCCH resource indicator (PRI) field and HARQ timing indicator field, the PUCCH resource and time slot can also be determined through this field.

[0151] [Resource 2]

[0152] In cases where the group common DCI does not have a PRI field, PUCCH resources can also be determined using the PUCCH resource set and the PUCCH resource determination method prior to RRC connection establishment (when no dedicated PUCCH resources are provided). In this determination method, the UE determines the PUCCH resource set based on parameters provided through system information (SIB1), and determines the PUCCH resources from this PUCCH resource set based on the PDCCH (PRI field / initial control channel element (CCE) index).

[0153] The HARQ timing indicator field may or may not be included in the group common DCI. When the HARQ timing indicator field is not included in the group common DCI, HARQ timing can be specified in the specification, set by higher layers, or reported by the UE as a UE capability.

[0154] According to the first embodiment described above, even if the reception of the group common PDCCH fails, the TCI status identification between the UE and the base station can be consistent.

[0155] <Third Implementation Method>

[0156] HARQ resources for group public PDCCHs with TCI indications can also follow at least one of the following methods 3-1 to 3-4.

[0157] Method 3-1: UE-specific PUCCH / PUSCH resources

[0158] Method 3-1 can also follow at least one of the following methods 3-1-1 and 3-1-2.

[0159] [Method 3-1-1]

[0160] The PRI / HARQ timing indicator can also have multiple fields for multiple UEs.

[0161] [Method 3-1-2]

[0162] The PRI / HARQ timing indicator can also have a single field that is used in multiple UEs.

[0163] For example, the higher-level settings of PUCCH resources can also be UE-specific. For multiple UEs, the same PRI field can indicate different PUCCH resources. For each of the multiple UEs, a list of UE-specific PUCCH resources can also be set. Multiple PUCCH resources can also be mapped to multiple values ​​of the PRI field. Each UE can also use the PUCCH resource corresponding to the value of the PRI field from the set multiple PUCCH resources when sending HARQ-ACK information.

[0164] exist Figure 11 In the example, PUCCU resources #1-1 to #1-8 corresponding to PRI field values ​​000 to 111 can also be configured for UE #1. Similarly, PUCCU resources #2-1 to #2-8 corresponding to PRI field values ​​000 to 111 can be configured for UE #2. And PUCCU resources #3-1 to #3-8 corresponding to PRI field values ​​000 to 111 can also be configured for UE #3.

[0165] The mapping between PRI and PUCCH resource lists for multiple UEs can also be configured at higher levels.

[0166] The new DCI format can also have multiple fields for the PRI / HARQ timing indicator. It can also follow the order of C-RNTI, with each field indicating HARQ resources for a single UE. Alternatively, it can follow RRC, with each field indicating HARQ resources for multiple UEs.

[0167] Method 3-2: UE Public PUCCH / PUSCH Resources

[0168] Method 3-2 can also follow at least one of the following methods 3-2-1 and 3-2-2.

[0169] [Method 3-2-1]

[0170] If a group common DCI with a TCI indication is detected, the UE can also send HARQ-ACK information in the PUCCH resource. Multiple UEs can also share the same PUCCH resource. For each of the multiple UEs, a list of common PUCCH resources can also be set. These multiple PUCCH resources can also be mapped to multiple values ​​in the PRI field. Each UE can also use the PUCCH resource corresponding to the value of the PRI field from the set multiple PUCCH resources when sending the HARQ-ACK information.

[0171] exist Figure 12 In the example, the PUCCH resources #1-1 to #1-8 corresponding to the values ​​000 to 111 of the PRI field can also be set for UE #1 to #3.

[0172] If a group common DCI with a TCI indication is detected and decoded normally, the UE can also send a PUCCH with an ACK. The UE can also choose not to respond with a NACK. If the network (NW, e.g., the base station) distinguishes PUCCH / PUSCH from different UEs, the NW can also consider that there is no beam update for UEs that do not respond (due to NACK or failed detection of group common DCI). If multiple UEs are allocated common PUCCH / PUSCH resources, the NW can also distinguish PUCCH / PUSCH from different UEs based on power domain / time domain / frequency domain / code domain (sequence, cyclic shift).

[0173] If a Group Common DCI with a TCI indication is detected but not properly decoded, the UE can also send a PUCCH with a NACK. If the NW receives the NACK, the NW can also identify that at least one UE has not properly received the Group Common DCI. If the NW does not receive the NACK feedback, the NW does not recognize the failure to receive the Group Common DCI.

[0174] exist Figure 13A In the example, UEs #1 to #4 are allocated overlapping PUCCH resources in both the time and frequency domains. UEs that fail to decode the group common DCI correctly send a NACK using PUCCH format 0. For example... Figure 13B In this way, the base station can detect that at least one UE has sent a NACK by detecting the received power in the PUCCH resource (e.g., received power exceeding a threshold).

[0175] Method 3-3

[0176] If the UE detects a group common DCI, the UE can also send a PUCCH based on method 3-2.

[0177] If PUCCH resources overlap for multiple UEs, the NW will have difficulty identifying the UE if it fails to detect the group common DCI.

[0178] For NW (Network Controller), whether the UE fails to detect Group Common DCI is more important than whether the UE detects it. How NW identifies whether the UE has failed to detect Group Common DCI becomes a problem.

[0179] The possible timing / search space for group common DCI indicating TCI status for multiple UEs can also be set / indicated through DCI / higher layers. UEs can also monitor the possible timing (monitoring timing, PDCCH monitoring timing) / search space for group common DCI. If a UE successfully detects group common DCI, it may not need to send a PUCCH. If a UE fails to successfully detect group common DCI, it may send a PUCCH based on method 3-2. Only UEs that fail to detect group common DCI send a PUCCH, and the base station can also identify that at least one UE has failed in DCI reception.

[0180] exist Figure 14 In the example, timings #1 and #2 represent the possible timings / search space for the group common DCI indicating the TCI status. If a UE successfully receives the group common DCI in timing #1 but fails to receive it in timing #2, a PUCCH is sent in the PUCCH resource. This PUCCH resource is not indicated through the group common DCI. The PUCCH resource can be set by higher layers or determined from the PUCCH resource set used before the RRC connection is established.

[0181] Methods 3-4

[0182] Whether the NW can distinguish PUCCH feedback from different UEs and how the NW retransmits the group common DCI used for beam updates are questions.

[0183] NW can also follow either of the following methods 3-4-1 and 3-4-2.

[0184] [Method 3-4-1]

[0185] If the NW cannot distinguish between PUCCH feedback with NACK from different UEs, the NW may also retransmit the same group common DCI to all UEs at the destination of the group common DCI. In this case, in order to indicate to the UEs that the PUCCH has been received normally, the fourth implementation method described later may also be applied to all UEs.

[0186] [Method 3-4-2]

[0187] If the NW can distinguish PUCCH feedback with NACK from different UEs, the NW can also identify UEs that have failed in DCI decoding. Then, the NW can also follow at least one of operations 1 to 3 below.

[0188] [[Operation 1]]

[0189] The same group common DCI can also be retransmitted using the TCI indication. For example, to support soft merging, the initial transmission and retransmission of the group common DCI can have the same HARQ process number (HPN) indication. A UE that normally receives the first DCI (initial transmission) may not need to monitor DCI retransmissions. The timing of retransmission monitoring can be specified in the specification or set by higher layers. The DCI can also have a field indicating whether it is an initial transmission or a retransmission. Figure 15 In the example, a UE that normally receives the first DCI can ignore the retransmitted DCI.

[0190] [[Operation 2]]

[0191] NW can also retransmit group common DCIs with different TCI indications. For example, a retransmission can be a TCI indication only for UEs that failed to receive on the initial transmission. Alternatively, for UEs that succeeded in receiving on the initial transmission, no TCI status update can be performed.

[0192] [[Operation 3]]

[0193] NW can also retransmit UE-specific DCI only for UEs that failed to receive the initial transmission.

[0194] According to the third implementation described above, even in the event of failure to receive the group common PDCCH, inconsistencies in TCI state identification between the UE and the base station can be suppressed.

[0195] <Fourth Implementation>

[0196] After the UE sends a HARQ-ACK message for the group common DCI containing the TCI field, the UE can also receive a response to the HARQ-ACK message, and the UE can update the TCI assumption after a specific time from the receipt of the response (e.g., the final symbol of the response). Figure 16 As in the example, a specific time can also be a K symbol. K can be specified in the specification, set by a higher layer, or reported by the UE as a UE capability. The response can also follow at least one of the following responses 1 and 2.

[0197] [Response 1]

[0198] The response from the base station can also be a DCI with a CRC scrambled via x-RNTI. This DCI can be transmitted either in a separately configured search space / CORESET or in any search space / CORESET. x-RNTI can be either C-RNTI or RNTI configured for multiple UEs for group-based beam indication (dedicated RNTI, separately configured RNTI).

[0199] [Response 2]

[0200] Responses from the base station can also be sent via dedicated physical resources (separately configured physical resources). These dedicated physical resources can be the same as the Physical HARQ Indicator Channel (PHICH) in LTE. Dedicated physical resources can be common to all UEs. The same physical resource can be configured for multiple UEs. Dedicated physical resources can also be UE-specific (UE-specific). Different physical resources can also be configured for each UE.

[0201] According to the fourth implementation described above, even in the event of failure to receive the group common PDCCH, inconsistencies in TCI state identification between the UE and the base station can be suppressed.

[0202] <Fifth Implementation>

[0203] Alternatively, a UE capability corresponding to at least one function (feature) in the first to fourth embodiments can be specified. When the UE reports this UE capability, the UE can also perform the corresponding function. When the UE reports this UE capability and a higher-level parameter corresponding to the function is set, the UE can also perform the corresponding function. A higher-level parameter (RRC information element) corresponding to the function can also be specified. When this higher-level parameter is set, the UE can also perform the corresponding function.

[0204] UE capabilities can also indicate whether the UE supports the function.

[0205] According to the fifth embodiment described above, the UE can maintain compatibility with existing specifications and can achieve at least one of the functions described above.

[0206] (Wireless Communication System)

[0207] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0208] Figure 17 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 can also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0209] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0210] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0211] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity of NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0212] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0213] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0214] Each CC can 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)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). Furthermore, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0215] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0216] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the 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, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0217] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0218] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0219] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0220] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0221] As a downlink channel, the wireless communication system 1 can also use downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), downlink control channels (Physical Downlink Control Channel (PDCCH)) and so on, which are shared by each user terminal 20.

[0222] In addition, as uplink channels, the wireless communication system 1 may also use uplink shared channels (Physical Uplink Shared Channel (PUSCH)), uplink control channels (Physical Uplink Control Channel (PUCCH)), random access channels (Physical Random Access Channel (PRACH)) and so on, which are shared by each user terminal 20.

[0223] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0224] Lower-layer control information can also be transmitted via PDCCH. Lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0225] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0226] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0227] A search space can also correspond to one or more PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0228] Uplink control information (UCI) including at least one of Channel State Information (CSI), delivery confirmation information (such as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR) can also be transmitted via PUCCH. Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0229] Furthermore, in this disclosure, downlink, uplink, etc., may be described without the word "link". Additionally, various channels may be described without the word "physical".

[0230] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. As DL-RS, wireless communication system 1 can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), phase tracking reference signals (PTRS), etc.

[0231] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. Furthermore, SS, SSB, etc., can also be called reference signals.

[0232] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific reference signal).

[0233] (Base station)

[0234] Figure 18 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0235] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it can also be envisioned that the base station 10 also possesses other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0236] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0237] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0238] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0239] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0240] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0241] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0242] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0243] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0244] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0245] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0246] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received through the transmitting and receiving antenna 130 into the baseband signal.

[0247] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including 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 acquire user data, etc.

[0248] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0249] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 and other base stations 10, and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0250] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0251] The transmitting / receiving unit 120 may also transmit TCI status information representing multiple Transmission Setting Indication (TCI) states, and may also transmit group-common downlink control information. The control unit 110 may also apply the TCI states associated with the values ​​of fields in the downlink control information in at least one of the uplink and downlink signals.

[0252] The transmit / receive unit 120 can also transmit group common downlink control information indicating the transmit setting indication (TCI) status. The control unit 110 can also control the reception of feedback information indicating success or failure of the reception of the downlink control information.

[0253] (User terminal)

[0254] Figure 19 This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0255] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0256] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0257] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0258] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0259] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0260] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0261] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0262] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0263] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0264] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may 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 transmitted, and output the baseband signal.

[0265] Furthermore, the application of DFT processing can be based on the transform precoding settings. For a specific channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform. Otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above without performing DFT processing.

[0266] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0267] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 230.

[0268] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data.

[0269] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can 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 can also be output to the control unit 210.

[0270] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0271] The transmit / receive unit 220 can also receive TCI status information representing multiple transmit setting indication (TCI) states, and can also receive group-common downlink control information. The control unit 210 can also apply the TCI states among the multiple TCI states that are associated with the values ​​of fields in the downlink control information in at least one signal of the uplink and downlink.

[0272] The control unit 210 may also apply the TCI state to the signal after a specific time has elapsed since the transmission of feedback information indicating success or failure of the reception of the downlink control information.

[0273] The TCI status information can also be terminal-specific.

[0274] The TCI status information can also be shared by multiple terminals.

[0275] The transmit / receive unit 220 can also receive group common downlink control information indicating the Transmission Setting Indication (TCI) status. The control unit 210 can also control the transmission of feedback information indicating the success or failure of receiving the downlink control information.

[0276] The transmitting and receiving unit 220 can also receive resource information representing multiple resources that provide the feedback information. The control unit 210 can also use resources among the multiple resources that are associated with the values ​​of fields in the downlink control information during transmission.

[0277] The transmitting and receiving unit 220 can also receive monitoring information indicating the monitoring timing for the downlink control information. If the reception of the downlink control information fails during the monitoring timing, the control unit 210 can also control the transmission of feedback information indicating the failure to receive the downlink control information.

[0278] The transmitting and receiving unit 220 can also receive retransmissions of the downlink control information sent based on the feedback information, or responses sent based on the feedback information.

[0279] (Hardware Structure)

[0280] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0281] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method is not particularly limited.

[0282] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 20 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0283] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0284] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0285] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 can perform calculations and control communication via the communication device 1004, or control at least one of reading out and writing data in the memory 1002 and the storage device 1003.

[0286] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0287] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001; similar implementations can be made for other functional blocks.

[0288] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0289] Storage device 1003 may also be a computer-readable recording medium, such as comprising at least one of the following: flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM, etc.), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0290] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0291] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0292] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0293] Furthermore, the base station 10 and the user terminal 20 can also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and can be used to implement some or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0294] (Modified Example)

[0295] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0296] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0297] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0298] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). Furthermore, a time slot can also be a time unit based on a set of parameters.

[0299] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0300] 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 can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols used in this disclosure can be used interchangeably.

[0301] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0302] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0303] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0304] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0305] A TTI with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini time slot, sub-time slot, time slot, etc.

[0306] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0307] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0308] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0309] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0310] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0311] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0312] A BWP can also include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs can also be set within a single carrier.

[0313] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0314] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0315] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0316] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0317] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0318] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0319] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using management tables. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0320] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher 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 combinations thereof.

[0321] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0322] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0323] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0324] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0325] Furthermore, software, instructions, and information can 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 technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0326] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0327] In this disclosure, the terms "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "transmission configuration indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0328] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0329] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0330] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0331] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0332] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0333] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to a structure where the communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0334] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0335] In this disclosure, actions purported to be performed by the base station are sometimes also performed by its upper node, depending on the circumstances. Clearly, in a network containing 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 (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0336] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, with respect to the methods described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0337] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile Communications (GSM (registered trademark))), CDMA2000, Ultra Mobile Broadband (UMB), IEEE This includes 802.11 (Wi-Fi, registered trademark), IEEE 802.16 (WiMAX, registered trademark), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0338] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0339] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0340] The term "determining" as used in this disclosure can encompass a wide variety of actions. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), and ascertaining.

[0341] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0342] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". In other words, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made.

[0343] In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0344] The term "maximum transmit power" as used in this 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).

[0345] As used in this disclosure, the terms "connected," "coupled," or any variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually "connected" or "coupled" elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0346] In this disclosure, when two elements are connected, it is possible to use more than one wire, cable, printed electrical connection, etc., and to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region as several non-limiting and non-inclusive examples, so that they are "connected" or "combined" with each other.

[0347] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0348] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0349] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0350] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented with modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this disclosure is for illustrative purposes only and is not intended to limit the invention in any way.

Claims

1. A terminal, comprising: The receiving unit receives multiple Transmission Setting Indication (TCI) states, each representing a specific Radio Resource Control (RRC) element for each terminal, and also receives common Downlink Control (DCI) information shared by the terminals. The control unit applies the TCI state represented by the DCI to at least one signal of the uplink and downlink after a time has elapsed since the DCI was received, as a terminal capability reported.

2. A wireless communication method for a terminal, comprising: The steps include receiving multiple Transmission Setting Indication (TCI) states, each representing a specific Radio Resource Control (RRC) IE for each terminal, and receiving common Downlink Control (DCI) information for the multiple terminals; and... The step of applying the TCI state represented by the DCI to at least one signal of the uplink and downlink after a period of time has elapsed since the DCI was received as a terminal capability.

3. A base station, comprising: The transmitting unit transmits multiple transmission setting indication states (i.e., multiple TCI states) and radio resource control information elements (RRC IEs) specific to each terminal, and transmits downlink control information (DCIs) common to the multiple terminals; and The control unit, after receiving the DCI from the terminal, has elapsed the time reported by the terminal as a terminal capability, applies the TCI state represented by the DCI to at least one of the uplink and downlink signals.

4. A system having a terminal and a base station, The terminal has: The receiving unit receives multiple Transmission Setting Indication (TCI) states, each representing a specific Radio Resource Control (RRC) element for each terminal, and also receives common Downlink Control (DCI) information shared by the terminals. The control unit, after a period of time elapsed since receiving the DCI and during which it has been reported as a terminal capability, applies the TCI state represented by the DCI to at least one signal in the uplink and downlink. The base station has: The transmitting unit transmits the RRC IE and the DCI.

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