Method performed by terminal or base station in wireless communication system and apparatus therefor

Abstract

A method performed by a terminal according to at least one of the embodiments disclosed in the specification can include receiving configuration information for a beam measurement report through higher layer signaling, measuring a plurality of signals, and transmitting a terminal-initiated beam measurement report based on at least one of one or more events being satisfied through the configuration information, wherein: the plurality of signals are respectively related to a plurality of active transmission configuration index (TCI) states of the terminal; and the terminal obtains a first measurement value based on a signal having at least an Xth highest quality among the plurality of signals related to the plurality of active TCI states, and determines that a first event among the one or more events has been satisfied based on a quality of a specific beam being better than the obtained first measurement value by a first threshold or more.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems, and more specifically, to a method and apparatus for a user equipment or base station to transmit or receive uplink / downlink wireless signals in a wireless communication system. Background Technology

[0002] Typically, wireless communication systems are evolving to provide communication services such as audio communication and data communication by covering a wider range of areas. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, a multiple access system can be any of the following: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA).

[0003] In existing New Radio (NR) standards, the base station (BS) is defined to provide configuration information about beam measurement / reporting to the user equipment (UE) for beam management. This configuration information explicitly indicates to the UE which beams it needs to measure / report.

[0004] Depending on the channel environment, for example, in environments with high UE mobility, the UE needs to frequently perform beam measurement reports to find the optimal beam. In this case, issues arise such as reference signal overhead, UE measurement / reporting overhead, and increased power consumption. Summary of the Invention

[0005] Technical issues

[0006] The purpose of this disclosure is to provide a method and apparatus for efficiently performing wireless signal transmission and reception. For example, a method and apparatus for more efficiently performing beam measurement reporting between a user equipment (UE) and a base station (BS) via a measurement report initiated by a UE can be provided.

[0007] Other purposes can be inferred from the detailed description.

[0008] Technical solution

[0009] In one aspect of this disclosure, a method performed by a user equipment (UE) is provided. The method includes: receiving configuration information for a beam measurement report via higher-layer signaling; measuring multiple signals; and sending a UE-initiated beam measurement report based on the satisfaction of at least one of one or more events configured by the configuration information. The multiple signals may be associated with multiple Active Transmission Configuration Index (TCI) states of the UE, respectively. The UE may obtain a first measurement value based on a signal having at least the Xth highest quality among the multiple signals associated with the multiple active TCI states; and determine that the first event among the one or more events is satisfied based on the quality of a specific beam being higher than the obtained first measurement value by a first threshold or more.

[0010] Multiple active TCI states can be associated with multiple current beams configured for the UE.

[0011] A specific beam can be a new beam that is different from the current beam.

[0012] At least one of the first threshold and X can be configured using configuration information.

[0013] Multiple signals can be reference signals used for multiple active TCI states.

[0014] Quality can be the Layer 1 Reference Signal Received Power (L1-RSRP).

[0015] One or more events may include a second event.

[0016] The second event can be satisfied if the number of instances in which the quality of the new beam is determined to be higher than the quality of the UE's current beam by a second threshold or more within the time window exceeds M.

[0017] At least one of the time window, second threshold, and M can be configured through configuration information.

[0018] One or more events may include a third event.

[0019] The third event can be satisfied if the quality of the new beam is lower than the quality of the UE's current beam by a third threshold.

[0020] The third threshold can be configured through configuration information.

[0021] In another aspect of this disclosure, a non-transitory computer-readable recording medium having a program recorded thereon for performing the methods described above is provided.

[0022] In another aspect of this disclosure, an apparatus is provided. The apparatus includes: a memory storing instructions; and a processor configured to perform operations by executing the instructions. Operation of the processor includes: receiving configuration information for a beam measurement report via higher-layer signaling; measuring a plurality of signals; and transmitting a device-initiated beam measurement report based on at least one of one or more events configured by the configuration information being satisfied. The plurality of signals may be associated with a plurality of active TCI states of the apparatus, respectively. The apparatus may obtain a first measurement value based on a signal having at least the Xth highest quality among the plurality of signals associated with the plurality of active TCI states; and determine that the first event among the one or more events is satisfied based on the quality of a specific beam being higher than the obtained first measurement value by a first threshold or more.

[0023] The device may further include a transceiver configured to transmit or receive wireless signals under the control of a processor.

[0024] This device can be a UE in a wireless communication system.

[0025] The device can be a processing device configured to control the UE in a wireless communication system.

[0026] In another aspect of this disclosure, a method performed by a base station (BS) is provided. The method includes: sending configuration information for a beam measurement report to a UE via higher-layer signaling; sending multiple signals; and receiving a UE-initiated beam measurement report from the UE. The configuration information can be used to configure one or more events for the UE to receive the UE-initiated beam measurement report. The multiple signals can be associated with multiple active TCI states of the UE, respectively. The one or more events can include a first event satisfied based on the quality of a specific beam being higher than a first measurement value of the UE by a first threshold or more. The first measurement value for the first event can be obtained based on a signal having at least the Xth highest quality among the multiple signals associated with the multiple active TCI states.

[0027] In another aspect of this disclosure, a BS (Browser Controller) is provided. The BS includes: a memory storing instructions; and a processor configured to perform operations by executing the instructions. Operations of the processor include: sending configuration information for beam measurement reports to a UE via higher-layer signaling; sending multiple signals; and receiving beam measurement reports initiated by the UE from the UE. The configuration information can be used to configure one or more events for the UE to receive beam measurement reports initiated by the UE. The multiple signals can be associated with multiple Active Transmission Configuration Index (TCI) states of the UE, respectively. The one or more events can include a first event satisfied based on the quality of a specific beam being higher than a first measurement value of the UE by a first threshold or more. A first measurement value for the first event can be obtained based on a signal having at least the Xth highest quality among the multiple signals associated with multiple active TCI states.

[0028] Beneficial effects

[0029] According to this disclosure, wireless signal transmission and reception can be performed efficiently in a wireless communication system. For example, because beam measurement reporting is performed through measurement reports initiated by a user equipment (UE), the overhead of measuring the target signal and the overhead associated with the measurement reports through the UE can be reduced, and power efficiency can be improved.

[0030] Other technical effects can be inferred from the detailed description. Attached Figure Description

[0031] Figure 1 The physical channel used in the 3rd Generation Partnership Project (3GPP) system, which serves as an exemplary wireless communication system, and the general signal transmission method using it are illustrated.

[0032] Figure 2 The structure of a radio frame is shown.

[0033] Figure 3 The resource grid for the time slot is shown.

[0034] Figure 4 An exemplary mapping of physical channels in a time slot is shown.

[0035] Figure 5 An exemplary physical downlink shared channel (PDSCH) and ACK / NACK transmission and reception process is shown.

[0036] Figure 6 An exemplary Physical Uplink Shared Channel (PUSCH) transmission process is shown.

[0037] Figure 7 An example of a CSI-related process is shown.

[0038] Figure 8The diagram illustrates a beam measurement reporting process according to an embodiment of this disclosure.

[0039] Figure 9 This is a diagram used to explain the operation of the UE according to the embodiment.

[0040] Figure 10 This is a diagram used to explain the BS operation according to the embodiment.

[0041] Figures 11 to 14 A communication system 1 and a wireless device applicable to this disclosure are shown. Detailed Implementation

[0042] The embodiments disclosed herein are applicable to various radio access technologies such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (A) is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolution of 3GPP LTE / LTE-A.

[0043] As more and more communication devices require greater communication capacity, there is a need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Furthermore, the ability to provide various services anytime, anywhere by connecting multiple devices and objects is another important consideration for next-generation communications. Communication system designs considering reliability and latency-sensitive services / UEs are also being discussed. Therefore, the introduction of new radio access technologies that consider enhanced mobile broadband (eMBB), massive MTC, and ultra-reliable low-latency communication (URLLC) is being discussed. In this disclosure, for simplicity, this technology will be referred to as NR (New Radio or New RAT).

[0044] For the sake of brevity, this disclosure primarily describes 3GPP NR, but the technical concepts herein are not limited thereto.

[0045] In this disclosure, the term "settings" may be replaced with "configuration," and the two are used interchangeably. Furthermore, conditional expressions (e.g., "if," "in the case of," or "when") may be replaced by "based on" or "in the state of." Additionally, the operation or software / hardware (SW / HW) configuration of the user equipment (UE) / base station (BS) can be derived / understood based on the satisfaction of corresponding conditions. When the processing on the receiving (or transmitting) side can be derived / understood from the processing on the transmitting (or receiving) side in signal transmission / reception between wireless communication devices (e.g., BS and UE), its description may be omitted. For example, signal determination / generation / encoding / transmission on the transmitting side can be understood as signal monitoring reception / decoding / determination on the receiving side. Furthermore, when referring to the UE performing (or not performing) a specific operation, this can also be interpreted as the BS expecting / assuming (or not expecting / assuming) the UE to perform that specific operation. Similarly, when referring to the BS performing (or not performing) a specific operation, this can also be interpreted as the UE expecting / assuming (or not expecting / assuming) the BS to perform that specific operation. In the following description, for ease of description, sections, implementation methods, examples, options, methods, and solutions are distinguished and indexed, but this does not mean that each of them necessarily constitutes an independent invention or that each of them should be implemented only individually. Unless explicitly contradictory, it can be deduced / understood that at least some sections, implementation methods, examples, options, methods, and solutions can be combined or omitted.

[0046] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) via a downlink (DL) and transmits information to the BS via an uplink (UL). The information transmitted and received by the BS and UE includes data and various control information, and varies depending on the type / purpose of the information transmitted and received by the UE and BS, encompassing various physical channels.

[0047] Figure 1 The physical channel used in a 3GPP NR system and the general signal transmission method using it are shown.

[0048] When the UE is powered on again from a power-off state or enters a new cell, in step S101, the UE performs an initial cell search procedure (e.g., establishing synchronization with the BS). For this purpose, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE establishes synchronization with the BS based on the PSS / SSS and obtains information such as the cell identifier (ID). The UE can obtain broadcast information in the cell based on the PBCH. The UE can receive a DL reference signal (RS) during the initial cell search procedure to monitor the DL channel status.

[0049] After the initial cell search, in step S102, the UE can obtain more specific system information by receiving the Physical Downlink Control Channel (PDCCH) and receiving the Physical Downlink Shared Channel (PDSCH) based on the information in the PDCCH.

[0050] In steps S103 to S106, the UE may perform a random access procedure to access the BS. For random access, the UE may send a preamble to the BS on the Physical Random Access Channel (PRACH) (S103) and receive a response message for the preamble on the PDCCH and the corresponding PDSCH (S104). In the case of contention-based random access, the UE may further perform a contention resolution procedure by sending a PRACH (S105) and receiving the PDCCH and the corresponding PDSCH (S106).

[0051] Following the aforementioned process, the UE can receive the PDCCH / PDSCH (S107) and transmit the Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S108), as part of the general downlink / uplink signal transmission process. The control information sent from the UE to the BS is called Uplink Control Information (UCI). UCI includes Hybrid Automatic Repeat and Request Acknowledgment / Nack Acknowledgment (HARQ-ACK / NACK), Scheduling Request (SR), Channel State Information (CSI), etc. CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc. Although UCI is usually transmitted on the PUCCH, it can be transmitted on the PUSCH when control information and service data need to be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via the PUSCH according to network requests / commands.

[0052] Figure 2 The radio frame structure is shown. In NR, uplink and downlink transmissions are configured in frames. Each radio frame is 10ms long and is divided into two 5ms half-frames (HF). Each half-frame is further divided into five 1ms subframes (SF). Subframes are divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols. When using a normal CP, each time slot includes 14 OFDM symbols. When using an extended CP, each time slot includes 12 OFDM symbols.

[0053] Table 1 illustrates, for example, how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when using normal CP.

[0054] [Table 1] N slot symb Number of symbols in a time slot N frame,u slot Number of time slots in a frame N subframe,u slot Number of time slots in a subframe Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe that vary according to SCS when using extended CP.

[0055] [Table 2]

[0056] The frame structure is only an example. The number of subframes, time slots, and symbols in a frame can vary.

[0057] In NR systems, OFDM parameter sets (e.g., SCS) can be configured differently for multiple cells aggregated for a single UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slots, or TTI) (referred to as time units (TU) for simplicity) consisting of the same number of symbols can be configured differently among the aggregated cells. Here, symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0058] Figure 3 The resource grid shows a time slot. A time slot comprises multiple symbols in the time domain. For example, when using a normal CP, a time slot comprises 14 symbols. However, when using an extended CP, a time slot comprises 12 symbols. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) is defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 consecutive subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., five) BWPs. Data communication can be performed through enabled BWPs, and only one BWP can be enabled for a UE. In the resource grid, individual elements are called resource elements (REs), and a complex symbol can be mapped to individual REs.

[0059] Figure 4This illustrates an exemplary mapping of physical channels within a time slot. The PDCCH can be transmitted in the DL control area, and the PDSCH can be transmitted in the DL data area. The PUCCH can be transmitted in the UL control area, and the PUSCH can be transmitted in the UL data area. The guard period (GP) provides a time gap for transmit-to-receive mode or receive-to-transmit mode switching at the BS and UE. Some symbols in the subframe during DL-UL handover can be configured as GP.

[0060] The physical channels will be described in more detail below.

[0061] The PDCCH transmits the DCI. For example, the PDCCH (i.e., the DCI) may carry information about the transmission format and resource allocation of the DL-SCH, resource allocation information for the Uplink Shared Channel (UL-SCH), paging information for the PCH, system information for the DL-SCH, resource allocation information for higher-layer control messages (e.g., RARs transmitted on the PDCCH), transmission power control commands, information about enabling / releasing configured schedules, etc. The DCI includes Cyclic Redundancy Check (CRC). The CRC is masked using various identifiers (IDs) (e.g., Radio Network Temporary Identifiers (RNTIs)) depending on the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked using the UE ID (e.g., Cell-RNTI (C-RNTI)). If the PDCCH is used for paging messages, the CRC is masked using the Paging-RNTI (P-RNTI). If the PDCCH is used for system information (e.g., System Information Block (SIB)), the CRC is masked by the System Information RNTI (SI-RNTI). When the PDCCH is used for RAR, the CRC is masked by the Random Access-RNTI (RA-RNTI).

[0062] The PDCCH comprises 1, 2, 4, 8, or 16 Control Channel Elements (CCEs) depending on its Aggregation Level (AL). A CCE is a logical allocation unit used to provide a specific code rate to the PDCCH based on the radio channel state. A CCE comprises six Resource Element Groups (REGs), each REG defined by one OFDM symbol × one (P)RB. The PDCCH is transmitted in a Control Resource Set (CORESET). A CORESET is defined as a set of REGs with a given set of parameters (e.g., SCS, CP length, etc.). Multiple CORESETs for a UE can overlap in the time / frequency domain. A CORESET can be configured by system information (e.g., Master Information Block (MIB)) or UE-specific higher-layer signaling (e.g., Radio Resource Control (RRC) signaling). Specifically, the number of RBs and symbols (up to 3) in a CORESET can be configured via higher-layer signaling.

[0063] For PDCCH reception / detection, the UE monitors PDCCH candidates. PDCCH candidates are the Common Enquiry Points (CCEs) that the UE should monitor to detect the PDCCH. Each PDCCH candidate is defined as having 1, 2, 4, 8, or 16 CCEs according to the Algorithm (AL). Monitoring includes (blind) decoding of the PDCCH candidates. The set of PDCCH candidates decoded by the UE is defined as the PDCCH Search Space (SS). The SS can be a Common Search Space (CSS) or a UE-Specific Search Space (USS). The UE can obtain the DCI by monitoring PDCCH candidates in one or more SSs configured by the MIB or higher-layer signaling. Each CORESET is associated with one or more SSs, and each SS is associated with a CORESET. SSs can be defined based on the following parameters.

[0064] - controlResourceSetId: CORESET associated with SS.

[0065] - monitoringSlotPeriodicityAndOffset: PDCCH monitoring periodicity (slot) and PDCCH monitoring offset (slot).

[0066] - monitoringSymbolsWithinSlot: PDCCH monitoring symbols within a slot (e.g., the first symbol of CORESET).

[0067] - nrofCandidates: The number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6 and 8) for each AL={1, 2, 4, 8, 16}.

[0068] The timing when a UE needs to monitor PDCCH candidates (e.g., time / frequency resources) is defined as a PDCCH (monitoring) timing. One or more PDCCH (monitoring) timings can be configured in a time slot.

[0069] Table 3 shows the characteristics of each SS.

[0070] [Table 3]

[0071] Table 4 shows the DCI format transmitted on the PDCCH.

[0072] [Table 4]

[0073] DCI format 0_0 can be used to schedule PUSCH based on TB (or TB level), and DCI format 0_1 ​​can be used to schedule PUSCH based on TB (or TB level) or PUSCH based on code block group (CBG) (or CBG level). DCI format 1_0 can be used to schedule PDSCH based on TB (or TB level), and DCI format 1_1 can be used to schedule PDSCH based on TB (or TB level) or PDSCH based on CBG (or CBG level) (or DL-licensed DCI). DCI formats 0_0 / 0_1 can be referred to as UL-licensed DCI or UL scheduling information, and DCI formats 1_0 / 1_1 can be referred to as DL-licensed DCI or DL ​​scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic slot format indicator (SFI)) to the UE, and DCI format 2_1 is used to transmit DL preemption information to the UE. DCI formats 2_0 and / or DCI format 2_1 can be transmitted to the corresponding group of UEs on the group common PDCCH (PDCCH pointing to a group of UEs).

[0074] DCI formats 0_0 and 1_0 can be referred to as fallback DCI formats, while DCI formats 0_1 and 1_1 can be referred to as non-fallback DCI formats. In fallback DCI formats, the DCI size / field configuration remains the same regardless of the UE configuration. Conversely, in non-fallback DCI formats, the DCI size / field configuration varies depending on the UE configuration.

[0075] PDSCH transmits DL data (e.g., DL Shared Channel Transport Block (DL-SCH TB)) using modulation schemes such as Quadrature Phase Shift Keying (QPSK), 16-element Quadrature Amplitude Modulation (16QAM), 64QAM, or 256QAM. TBs are encoded as codewords. PDSCH can transmit up to two codewords. Scrambling and modulation mapping can be performed on a codeword basis, and modulation symbols generated from each codeword can be mapped to one or more layers. Each layer, along with a demodulation reference signal (DMRS), is mapped to a resource, and OFDM symbol signals are generated from the layer mapped with the DMRS and transmitted through the corresponding antenna port.

[0076] PUCCH transmits uplink control information (UCI). UCI includes the following information.

[0077] - SR (Schedule Request): Information used to request UL-SCH resources.

[0078] - HARQ (Hybrid Automatic Repeat Request) - ACK (Acknowledgement): A response to a DL data packet (e.g., a codeword) on the PDSCH. HARQ-ACK indicates whether the DL data packet was successfully received. A 1-bit HARQ-ACK can be sent in response to a single codeword. A 2-bit HARQ-ACK can be sent in response to two codewords. HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. The term HARQ-ACK is used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0079] - CSI (Channel State Information): Feedback information for the DL channel. MIMO-related feedback information includes RI and PMI.

[0080] Table 5 shows exemplary PUCCH formats. Based on the PUCCH transmission duration, PUCCH formats can be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0081] [Table 5]

[0082] PUCCH format 0 transmits up to 2 bits of UCI and is mapped in a sequence-based manner for easy transmission. Specifically, the UE sends a specific UCI to the BS by transmitting one of multiple sequences on the PUCCH of PUCCH format 0. The UE only transmits the PUCCH of PUCCH format 0 in the PUCCH resource configured for the corresponding SR when the UE sends an affirmative SR.

[0083] PUCCH format 1 transmits up to 2 bits of UCI, and the modulation symbols of UCI are spread in the time domain with orthogonal overlay code (OCC) (configured differently depending on whether frequency hopping is performed). DMRS is transmitted in symbols that do not transmit modulation symbols (i.e., transmitted in time division multiplexing (TDM)).

[0084] PUCCH format 2 transmits more than 2 bits of UCI, and the modulation symbols of the DCI are transmitted using DMRS in frequency division multiplexing (FDM). The DMRS is located at a density of 1 / 3 in symbols #1, #4, #7, and #10 of a given RB. A pseudo-noise (PN) sequence is used for the DMRS sequence. Frequency hopping can be enabled for 2-symbol PUCCH format 2.

[0085] PUCCH format 3 does not support UE multiplexing within the same PRBS and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 do not include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0086] PUCCH format 4 supports multiplexing of up to four UEs within the same PRBS and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0087] At least one of one or two or more cells configured for the UE can be configured for PUCCH transmission. At least the primary cell can be set as the cell for PUCCH transmission. Based on the at least one cell configured for PUCCH transmission, at least one PUCCH cell group can be configured for the UE, and each PUCCH cell group includes one or two or more cells. A PUCCH cell group may be simply referred to as a PUCCH group. PUCCH transmission can be configured not only in the primary cell but also in secondary cells (Scells). The primary cell belongs to the primary PUCCH group, and the PUCCH-SCell configured for PUCCH transmission belongs to the secondary PUCCH group. For cells belonging to the primary PUCCH group, the PUCCH on the primary cell can be used. For cells belonging to the secondary PUCCH group, the PUCCH on the PUCCH-SCell can be used.

[0088] PUSCH transmits UL data (e.g., UL Shared Channel Transport Block (UL-SCH TB)) and / or UCI based on CP-OFDM or DFT-s-OFDM waveforms. When PUSCH is transmitted in DFT-s-OFDM waveform, the UE transmits PUSCH via transform precoding. For example, when transform precoding is not possible (e.g., disabled), the UE may transmit PUSCH using CP-OFDM waveform, while when transform precoding is possible (e.g., enabled), the UE may transmit PUSCH using either CP-OFDM or DFT-s-OFDM waveform. PUSCH transmission can be dynamically scheduled via UL authorization in DCI, or semi-statically scheduled via higher-layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling such as PDCCH) (configured scheduling or configured authorization). PUSCH transmission can be performed in a codebook-based or non-codebook-based manner.

[0089] Figure 5 This illustrates an exemplary ACK / NACK transmission process. (Refer to...) Figure 5 The UE can detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates the DL assignment offset K0 with the PDSCH and the PDSCH offset K1 with the HARQ-ACK report. For example, DCI format 1_0 and DCI format 1_1 may include the following information.

[0090] - Frequency domain resource assignment: Indicates the set of RBs assigned to the PDSCH.

[0091] - Time-domain resource assignment: Indicates the starting position (e.g., OFDM symbol index) and length (e.g., number of OFDM symbols) of K0 and the PDSCH in the time slot.

[0092] - PDSCH-to-HARQ_feedback timer indicator: Indicates K1.

[0093] - HARQ process ID (4 bits): The HARQ process ID that indicates the data (e.g., PDSCH or TB).

[0094] - PUCCH Resource Indicator (PRI): Indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in the PUCCH resource set.

[0095] After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE can send a UCI on the PUCCH in time slot #(n+K1). The UCI may include a HARQ-ACK response to the PDSCH. For convenience, Figure 5The assumption that the SCS of the PDSCH is equal to the SCS of the PUCCH and that slot #n1 = slot #(n+K0) should not be construed as limiting this disclosure. When the SCSs are different, K1 can be indicated / interpreted based on the SCS of the PUCCH.

[0096] When the PDSCH is configured to carry a maximum of one TB, the HARQ-ACK response can be configured in one bit. When the PDSCH is configured to carry a maximum of two TBs, if spatial bundling is not configured, the HARQ-ACK response can be configured in two bits; if spatial bundling is configured, the HARQ-ACK response can be configured in one bit. When time slot #(n+K1) is designated as the timing for HARQ-ACK transmissions of multiple PDSCHs, the UCI transmitted in time slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0097] Whether a UE should perform spatial binding in response to a HARQ-ACK response can be configured for each cell group (e.g., via RRC / higher-layer signaling). For example, spatial binding can be configured for individual HARQ-ACK responses sent on the PUCCH and / or on the PUSCH.

[0098] When up to two (or more) TBs (or codewords) can be received at once in the corresponding serving cell (which may be scheduled by a DCI) (e.g., when higher-layer parameters...). maxNrofCodeWordsScheduledByDCI Spatial binding is supported when 2 TB is specified. More than four layers can be used for 2TB of transmission, and up to four layers can be used for 1-TB of transmission. As a result, when spatial binding is configured for a corresponding cell group, spatial binding can be performed on serving cells within the cell group that can be scheduled for more than four layers. A UE that wants to send a HARQ-ACK response via spatial binding can generate a HARQ-ACK response by performing a (bit-wise) logical AND operation on the A / N bits of multiple TBs.

[0099] For example, suppose a UE receives a DCI that schedules two TBs and receives the two TBs on the PDSCH based on the DCI. The UE performing spatial bundling can generate a single A / N bit by performing a logical AND operation between the first A / N bit of the first TB and the second A / N bit of the second TB. As a result, when both the first TB and the second TB are ACK, the UE reports the ACK bit value to the BS, and when at least one TB is NACK, the UE reports the NACK bit value to the BS.

[0100] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE can generate a single A / N bit by performing a logical AND operation on the A / N bit and bit value 1 of a TB. As a result, the UE reports the A / N bit of one TB to the BS.

[0101] Multiple parallel DL HARQ processes exist at the BS / UE for DL ​​transmission. While the BS awaits HARQ feedback indicating the success or failure of a previous DL transmission, multiple parallel HARQ processes allow for continuous DL transmission. Each HARQ process is associated with a HARQ buffer in the Media Access Control (MAC) layer. Each DL HARQ process manages status variables such as the number of MAC Physical Data Unit (PDU) transmissions, HARQ feedback to MAC PDUs in the buffer, and the current redundant version. Each HARQ process is identified by a HARQ process ID.

[0102] Figure 6 An exemplary PUSCH transmission process is shown. (Refer to...) Figure 6 The UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). DCI format 1_0 or 1_1 may include the following information.

[0103] - Frequency domain resource assignment: Indicates the set of RBs assigned to PUSCH.

[0104] - Time-domain resource assignment: Indicates the slot offset K2 and the start position (e.g., OFDM symbol index) and duration (e.g., number of OFDM symbols) of the PUSCH within the slot. The start symbol and length of the PUSCH can be indicated by the start and length indicator value (SLIV) or separately.

[0105] Then, the UE can send the PUSCH in time slot #(n+K2) according to the scheduling information in time slot #n. The PUSCH includes the UL-SCH TB.

[0106] CSI related operations

[0107] Figure 7 An example of a CSI-related process is shown.

[0108] The UE receives CSI-related configuration information from the BS via RRC signaling (710). The CSI-related configuration information may include at least one of the following: Channel State Information-Interference Measurement (CSI-IM) related information, CSI measurement related information, CSI resource configuration related information, CSI-RS resource related information, or CSI report configuration related information.

[0109] - CSI-IM resources can be configured for UE interference measurement (IM). In the time domain, CSI-IM resource sets can be configured as periodic, semi-persistent, or aperiodic. CSI-IM resources can be configured as UE zero-power (ZP)-CSI-RS. ZP-CSI-RS can be configured to be distinguished from non-zero-power (NZP)-CSI-RS.

[0110] - The UE may assume that the CSI-RS resources configured for channel measurements and the CSI-IM / NZP CSI-RS resources configured for interference measurements for a CSI report have a QCL relationship with respect to the "QCL-TypeD" of the respective resources (when the NZP CSI-RS resources are used for interference measurements).

[0111] - CSI resource configuration may include at least one of CSI-IM resources for interference measurement, NZP CSI-RS resources for interference measurement, and NZP CSI-RS resources for channel measurement. The channel measurement resource (CMR) may be an NZP CSI-RS for CSI acquisition, and the interference measurement resource (IMR) may be an NZP CSI-RS for both CSI-IM and IM.

[0112] - CSI-RS can be configured for one or more UEs. Different CSI-RS configurations can be provided for each UE, or the same CSI-RS configuration can be provided to multiple UEs. CSI-RS can support up to 32 antenna ports. CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE locations within a time-frequency cell corresponding to one time slot and one RB. When N is 2 or greater, N-port CSI-RS can be multiplexed using CDM, FDM, and / or TDM methods. CSI-RS can be mapped to the remaining REs except for those mapped to CORESET, DMRS, and SSB. In the frequency domain, CSI-RS can be configured for the entire bandwidth, a portion of the bandwidth (BWP), or a portion of the bandwidth. CSI-RS can be transmitted in each RB within the bandwidth where CSI-RS is configured (i.e., density = 1), or CSI-RS can be transmitted in every two RBs (e.g., even or odd RBs) (i.e., density = 1 / 2). When CSI-RS is used as a Tracking Reference Signal (TRS), a single-port CSI-RS can be mapped onto three subcarriers in each resource block (i.e., density = 3). One or more CSI-RS resource sets can be configured for the UE in the time domain. Each CSI-RS resource set may include one or more CSI-RS configurations. Each CSI-RS resource set can be configured as periodic, semi-persistent, or aperiodic.

[0113] - CSI report configuration may include configuration of feedback type, measurement resources, report type, etc. NZP-CSI-RS resource sets can be used for the corresponding UE's CSI report configuration. NZP-CSI-RS resource sets can be associated with CSI-RS or SSB. Multiple periodic NZP-CSI-RS resource sets can be configured as TRS resource sets. (i) Feedback types include Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SSB Resource Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Layer 1 (L1) - Reference Received Signal Strength (RSRP), etc. (ii) Measurement resources may include configuration of downlink signals and / or downlink resources that the UE performs measurements to determine feedback information. Measurement resources can be configured as ZP and / or NZP CSI-RS resource sets associated with the CSI report configuration. NZP CSI-RS resource sets may include CSI-RS sets or SSB sets. For example, L1-RSRP can be measured for a CSI-RS set or an SSB set. (iii) Report types may include the timing of the UE reporting and the configuration of the uplink channel. The reporting time can be configured to be periodic, semi-persistent, or aperiodic. Periodic CSI reports can be sent on the PUCCH. Semi-persistent CSI reports can be sent on the PUCCH or PUSCH based on a Media Access Control (MAC) control element (CE) indicating whether it is enabled or disabled. Aperiodic CSI reports can be indicated by DCI signaling. For example, the uplink-granted CSI request field can indicate one of various report trigger sizes. Aperiodic CSI reports can be sent on the PUSCH.

[0114] The UE measures CSI based on configuration information related to CSI. CSI measurement may include receiving CSI-RS (720) and obtaining CSI by calculating the received CSI-RS (730).

[0115] The UE may send a CSI report to the BS (740). For the CSI report, the time and frequency resources available to the UE are controlled by the BS. Channel State Information (CSI) includes at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP, and / or L-SINR.

[0116] CSI reporting supports periodic, semi-permanent, and aperiodic temporal behavior. i) Periodic CSI reporting is performed in short and long PUCCHs. The periodicity and slot offset of periodic CSI reports can be configured by RRC, and refer to CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reporting is performed in short, long, or PUSCHs. For SP CSI in short / long PUCCHs, the periodicity and slot offset are configured by RRC, and CSI reporting is enabled / disabled via a separate MAC CE / DCI. For SP CSI in PUSCHs, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC, and SP CSI reporting is enabled / disabled by DCI (format 0_1). For SP CSI reporting in PUSCHs, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI report timing follows the PUSCH temporal allocation value indicated by the DCI, and subsequent CSI report timing follows the periodicity configured by RRC. DCI format 0_1 ​​may include a CSI request field and enable / disable a specific configured SP-CSI trigger state. SP CSI reports have the same or similar enable / disable mechanism as data transmission in the SPS PUSCH. iii) Non-periodic CSI reporting is performed in the PUSCH and triggered by the DCI. In this case, information related to the triggering of non-periodic CSI reports can be transmitted / indicated / configured via MAC-CE. For AP CSI with AP CSI-RS, the AP CSI-RS timing is configured by RRC, and the timing of AP CSI reports is dynamically controlled by the DCI.

[0117] Beam management (BM)

[0118] The BM procedure refers to the Layer 1 / Layer 2 (L1 / L2) procedure for acquiring and maintaining a set of beams that can be used for downlink (DL) and uplink (UL) transmission / reception of BSs (e.g., gNB, TRP, etc.) and / or UEs. The BM procedure may include the following procedures and terms.

[0119] - Beam measurement: The operation in which the BS or UE measures the characteristics of the received beam-shaped signal.

[0120] - Beam determination: where the BS or UE selects the operation of its transmit / receive (Tx / Rx) beam.

[0121] - Beam scanning: where Tx and / or Rx beams are used to cover a spatial area in a predetermined manner over a specific time period.

[0122] - Beam Report: The operation of the UE based on beam measurement reports about information about beamforming signals.

[0123] The BM process can be divided into (1) the DLBM process using the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block or CSI-RS and (2) the UL BM process using the Probe Reference Signal (SRS).

[0124] In addition, each BM process may include a Tx beam scan for determining the Tx beam and an Rx beam scan for determining the Rx beam.

[0125] DL BM

[0126] The DL BM process may include the transmission of DL RS (e.g., CSI-RS or SS Block (SSB)) via beamforming through the BS and beam reporting via the UE.

[0127] Here, the beam report may include the preferred DL RS ID and the corresponding L1 reference signal received power (L1-RSRP).

[0128] The DL RS ID can be an SSB Resource Indicator (SSBRI) or a CSI-RS Resource Indicator (CRI).

[0129] SSB beamforming and CSI-RS beamforming can be used for beam measurement. The measurement metric is the L1-RSRP per resource / block. SSB is used for coarse beam measurement, while CSI-RS can be used for fine beam measurement. SSB can be used for both Tx and Rx beam scanning.

[0130] (1) SSB beam

[0131] SSB-based Rx beam scanning can be performed across multiple SSB bursts. That is, Rx beam scanning can be performed when the UE changes the Rx beam used for the same SSBRI. Here, an SS burst includes one or more SSBs, and an SS burst set includes one or more SSB bursts.

[0132] Configure SSB-based beam reporting during CSI / beam configuration in RRC connected state (or RRC connected mode). The UE receives a CSI-ResourceConfig information element (IE) from the BS, which includes a CSI-SSB-ResourceSetList containing the SSB resources used for the BM.

[0133] (2) CSI-RS beam

[0134] The purpose of CSI-RS will be described as follows: i) If the repetition parameter is configured for a specific CSI-RS resource set and trs-Info is not configured, then CSI-RS will be used for BM. ii) If the repetition parameter is not configured and trs-Info is configured, then CSI-RS will be used for Tracking Reference Signal (TRS). iii) If neither the repetition parameter nor trs-Info is configured, then CSI-RS will be used for CSI acquisition.

[0135] You can configure repeat parameters only for the CSI-RS resource set associated with CSI-ReportConfig, where the report is set to L1 RSRP or "No Report" (or "None").

[0136] If the UE is configured with a CSI-ReportConfig in which reportQuantity is set to “cri-RSRP”, “cri-SINR”, or “none”, and if the CSI-ResourceConfig for channel measurement (higher-level parameter resourcesForChannelMeasurement) does not include the higher-level parameter “trs-Info” and includes an NZP-CSI-RS-ResourceSet in which the higher-level parameter “repeated” is configured, the UE may be configured with only the same number of ports (1 port or 2 ports) for all CSI-RS resources within the NZP-CSI-RS-ResourceSet, as indicated by the higher-level parameter “nrofPorts”.

[0137] When higher-level parameters are repeatedly set to "On", it relates to the UE's Rx beam scanning procedure. In this case, if the UE is configured with an NZP-CSI-RS-ResourceSet in which repetition is set to "On", the UE can assume that at least one CSI-RS resource within the NZP-CSI-RS-ResourceSet is transmitted using the same DL spatial domain transmission filter. That is, at least one CSI-RS resource within the NZP-CSI-RS-ResourceSet is transmitted via the same Tx beam. Here, at least one CSI-RS resource within the NZP-CSI-RS-ResourceSet can be transmitted in different OFDM symbols. Furthermore, the UE does not expect different periodicity in periodicityAndOffset for all CSI-RS resources within the NZP-CSI-RS-ResourceSet.

[0138] On the other hand, when repetition is set to "Off", it is related to the BS's Tx beam scanning process. In this case, when repetition is set to "Off", the UE does not assume that at least one CSI-RS resource within the NZP-CSI-RS-ResourceSet is transmitted using the same DL spatial domain transmission filter. That is, at least one CSI-RS resource within the NZP-CSI-RS-ResourceSet is transmitted via a different Tx beam.

[0139] - The UE receives the NZP CSI-RS resource set IE containing higher-layer parameter repetitions from the BS via RRC signaling. Here, the repetition parameter is set to "on".

[0140] - The UE receives CSI-RS resources within the NZP CSI-RS resource set, where repetition is set to "on", and repetition occurs in different OFDM symbols through the same Tx beam (or DL ​​spatial domain transmission filter) of the BS.

[0141] - The UE determines its Rx beam.

[0142] - The UE omits CSI reports. In this case, the reportQuantity in the CSI report configuration can be set to "No Report" (or 'None').

[0143] In other words, when repetition is set to "on", the UE can omit CSI reporting.

[0144] DL BM related beam indication

[0145] The UE can receive a list of up to M candidate Transport Configuration Indication (TCI) states via RRC configuration for at least Quasi-Co-location (QCL) indication purposes. Here, M can vary depending on the UE's capabilities. For example, M could be 64.

[0146] Each TCI state can be configured with a single RS set. For at least the spatial QCL purpose (QCL type D) within the RS set, each DL RS ID can refer to one of the DL RS types such as SSB, P-CSI RS, SP-CSI RS, or A-CSI RS.

[0147] The initialization / update of DL RS IDs within RS sets used for at least spatial QCL purposes can be performed via at least explicit signaling.

[0148] Version 16 / 17 Enhancements

[0149] In Release 16, enhancements have been made not only to beam / PL RS indication but also to beam reporting. Release 15 supported a mode where the UE measured / reported the L1-RSRP for each beam RS. However, in environments with significant inter-beam interference, a high L1-RSRP (Received Signal Strength) for a particular beam RS does not guarantee that the corresponding RS will have superior quality as a serving beam. In other words, the UE could select a beam with high received signal strength but also significant beam interference and report that beam to the BS. To overcome this limitation, Release 16 supports a new beam reporting mode where the BS configures not only RSs for channel measurements but also resources for interference measurements, and the UE measures the L1-SINR for both channel and interference resources and reports some RSs with high L1-SINR values.

[0150] In Release 16, various beamforming enhancements were implemented. In particular, features significantly reducing signaling overhead and latency associated with beamforming methods were introduced. However, for UEs operating using a single serving beam, there was no method for configuring / indicating beams holistically across channels / RSs. Based on this motivation, Release 17 standardized a method for configuring / indicating beams holistically across channels / RSs. In NR, DL beams are indicated by transmitting a configuration indicator (TCI), referred to as the unified TCI state. The unified TCI state is configured / indicated holistically while the existing TCI state is configured / indicated individually for each DL RS / channel. By default, the DL unified TCI state indication is holistically applied to QCL type-D RSs of (some) PDCCH, (some) PDSCH, and (some) CSI-RS resources. The UL unified TCI state indication is holistically applied to the spatial relation RSs (and PL RSs) of (some) PUCCH, (some) PUSCH, and (some) SRS resources. Additionally, similar to the default spatial relationship / PL RS feature in version 16, UL spatial relationships and PL RS can be aligned with the DL beam RS of the UE used to establish beam correspondence. Therefore, the channel / RS to which a unified TCI state is applied can encompass both DL and UL channel / RS. This is referred to as the joint DL / UL TCI state. In other words, both modes are supported.

[0151] - Joint DL / UL TCI Configuration / Indication Mode: The DL RS configured / indicated for the joint TCI state is applied not only as the QCL type-D source RS for the DL channel / RS but also as the spatial relation RS (and PL RS) for the UL channel / RS. In other words, when the joint TCI state is updated and indicated, the beam RS (and PL RS) for each of the corresponding DL channel / RS and UL channel / RS are changed together.

[0152] - Separate DL and UL TCI configuration / indication mode: The QCL type-D source RS for the DL channel / RS is configured / indicated as the DL TCI state, while the spatial relationship RS (and PL RS) for the UL channel / RS is configured / indicated as the UL TCI state. Here, the DL TCI state and the UL TCI state are configured / indicated separately.

[0153] It is anticipated that DL / UL / joint TCI states will be indicated / updated via MAC-CE and / or DCI. More specifically, one or more TCI states will be activated via MAC-CE among multiple TCI states configured via RRC (referred to as a TCI state pool). If multiple TCI states are activated via MAC-CE, one of the TCI states will be indicated via DCI. DCI indication is anticipated to be supported via the DLDCI format (DCI1-1 / 1-2) that supports TCI fields, and will be supported not only with PDSCH scheduling but also without PDSCH scheduling. In the latter case, because PDSCH scheduling is omitted (similar to a DCI-based semi-persistent scheduling (SPS) release), UE ACK transmission for the corresponding DCI can be supported.

[0154] Version 17 beam reporting mode allows the UE to measure / report the optimal beam RS for each TRP in an MTRP environment. To this end, the BS can configure the beam measurement RS set / group into two subsets / subgroups, and the UE can select RS for each subset / subgroup and report the quality value of the corresponding RS (L1-RSRP, [L1-SINR]).

[0155] Quasi-co-located (QCL)

[0156] When the channel properties of one antenna port are to be inferred from the channel properties of another antenna port, the two antenna ports are quasi-co-located. Channel properties may include one or more of the following: delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, and spatial RX parameters.

[0157] For PDCCH / PDSCH QCL, multiple Transport Configuration Indication (TCI) states can be configured to the UE via higher-layer signaling. For PDCCH QCL, up to 64 TCI states can be configured via RRC, and for PDSCH QCL, up to 128 TCI states can be configured via RRC. In the case of PDSCH QCL, a list of configurable TCI states can be provided via the higher-layer parameter PDSCH-Config.

[0158] Each TCI state is associated with a QCL configuration parameter between one or two DL RS and the DM-RS port of the PDSCH / PDCCH. The QCL configuration parameter may include qcl-Type1 for the first DL RS and qcl-Type2 for the second DL RS. The QCL type may correspond to one of the following:

[0159] - “QCL-TypeA”: {Doppler frequency shift, Doppler spread, average delay, delay spread}

[0160] - "QCL-TypeB": {Doppler frequency shift, Doppler spread}

[0161] - "QCL-TypeC": {Doppler shift, average delay}

[0162] - "QCL-TypeD": {Space Rx parameter}

[0163] TCI status configured via RRC signaling is disabled by default.

[0164] For PDSCH QCL, up to eight TCI states configured via RRC can be enabled via MAC CE. The TCI field included in the DCI that schedules the PDSCH can indicate one of the enabled TCI states (e.g., when providing a TCI field in the DCI is allowed via RRC signaling), and the UE can receive the PDSCH based on the QCL information corresponding to the indicated TCI state.

[0165] For PDCCH QCL, one of the TCI states configured via RRC can be enabled for the relevant CORESET via MAC CE. In order to receive PDCCH in the corresponding CORESET, the UE can receive PDCCH based on the QCL information corresponding to the enabled TCI state.

[0166] Operations related to multiple transmit and receive points (M-TRP)

[0167] Multi-TRP (M-TRP) transmissions, in which M TRPs send data to a single UE, can be divided into two main types: eMBB M-TRP transmissions, which aim to increase the transmission rate, and URLLC M-TRP transmissions, which aim to improve the success rate of reception and reduce latency.

[0168] The DL M-TRP URLLC transmission method refers to the method by which M-TRP transmits the same data / DCI using different spatial (e.g., layer / port), temporal, or frequency resources. For example, TRP 1 can transmit a specific data / DCI on resource 1, and TRP 2 can transmit a specific data / DCI on resource 2 (i.e., the same data / DCI).

[0169] In other words, when the DL M-TRP URLLC transmission method is configured, the UE can use different spatial, temporal, or frequency resources to receive the same data / DCI. In this case, the UE can receive an indication from the BS regarding the QCL RS / type (i.e., DL TCI state) of the spatial, temporal, or frequency resources to be used for receiving data / DCI.

[0170] For example, if data / DCI is received on both resource 1 and resource 2, the BS can provide the UE with the DLTCI status for resource 1 and the DL TCI status for resource 2. High reliability can be achieved by receiving data / DCI on both resource 1 and resource 2. This M-TRP URLLC transmission method can be applied to PDSCH / PDCCH.

[0171] The UL M-TRP URLLC transmission method refers to a method in which M-TRPs receive the same data / UCI from a single UE using different spatial, temporal, or frequency resources. For example, TRP 1 can receive the same data / UCI from the UE on resource 1, and TRP 2 can receive the same data / UCI from the UE on resource 2. Furthermore, TRP 1 and TRP 2 can share the data / UCI received from the UE via a backhaul link (connected between TRPs).

[0172] In other words, when configuring the UL M-TRP URLLC transmission method, the UE can transmit the same data / UCI to various TRPs using different spatial, temporal, or frequency resources. In this case, the UE can receive from the BS an indication of the Tx beam and Tx power (i.e., UL TCI state) to be used on the spatial, temporal, or frequency resources for transmitting the same data / UCI. For example, if the same data / UCI is transmitted on resource 1 and resource 2, the BS can provide the UE with the UL TCI state to be used for resource 1 and the UL TCI state to be used for resource 2. The UL M-TRP URLLC transmission method can be applied to PUSCH / PUCCH.

[0173] Furthermore, from the perspective of DCI transmission, M-TRP transmission methods can be divided into: i) M-TRP transmission methods based on multiple DCIs (multiple DCIs or M-DCIs), where each TRP sends different DCIs; and ii) M-TRP transmission methods based on a single DCI (single DCI or S-DCI), where one TRP sends the DCI. For example, in the case of S-DCI, since all scheduling information about the data sent via M-TRP needs to be transmitted in a single DCI, this method can be used in an ideal backhaul (BH) environment that allows dynamic cooperation between two TRPs.

[0174] Regarding M-TRP transmission and reception in the Rel-16 NR standard, PDSCH transmission and reception support both S-DCI-based and M-TRP transmission methods.

[0175] First, the M-TRP PDSCH transmission method based on S-DCI will be described.

[0176] For S-DCI-based M-TRP PDSCH transmission, one of the SDM, FDM, and / or TDM methods can be used. In the case of SDM, the BS transmits a single TB using multiple layers, but the BS transmits layers belonging to different DMRS CDM groups through different transmission beams (Tx beams) (i.e., QCL RS or TCI states). Compared to the traditional S-TRP transmission method, this method can increase the number of layers, thereby improving transmission capacity. Additionally, when transmitting a single TB using multiple layers, some layers can be sent to TRP 1, while the remaining layers are sent to TRP 2, which can enhance channel reliability through diversity gain.

[0177] For FDM, two schemes are supported: Scheme 2a and Scheme 2b. In Scheme 2a, a single TB is transmitted across multiple RBs, and RBs in different RB groups transmit using different Tx beams (i.e., QCL RS or TCI states). In Scheme 2b, the same TB is transmitted across different RB groups, and RBs in different RB groups transmit using different Tx beams (i.e., QCL RS or TCI states). For TDM, two schemes are supported: Scheme 3 and Scheme 4. In Scheme 4 (i.e., inter-slot TDM), the same TB is repeatedly transmitted across multiple time slots, and time slots in different time slot groups transmit using different Tx beams (i.e., QCL RS or TCI states). In Scheme 3 (i.e., intra-slot TDM), the same TB is repeatedly transmitted across multiple OFDM symbol groups, and some OFDM symbol groups and the remaining OFDM symbol groups transmit using different Tx beams (i.e., QCL RS or TCI states).

[0178] Next, the M-TRP PDSCH transmission method based on M-DCI will be described.

[0179] In M-TRP PDSCH transmission based on M-DCI, each TRP schedules and transmits PDSCHs via DCI. In other words, TRP 1 transmits PDSCH 1 via DCI 1, and TRP 2 transmits PDSCH 2 via DCI 2. When PDSCH 1 and PDSCH 2 overlap on the same frequency-time resource, both PDSCHs are received on the same RE, leading to increased resource efficiency and transmission capacity. To address this, the concept of a CORESET pool is introduced, referring to a group of multiple CORESETs. For example, TRP 1 transmits PDCCHs in a CORESET belonging to CORESET pool 0, and also transmits PDSCHs scheduled by the PDCCH pool. TRP 2 transmits PDCCHs in a CORESET belonging to CORESET pool 1, and also transmits PDSCHs scheduled by the PDCCH pool.

[0180] For PUSCH, a specific TRP can schedule PUSCH transmissions to the UE within a CORESET that belongs to the CORESET pool. For example, some PUCCH resources can be scheduled by TRP 1, and the remaining PUCCH resources can be scheduled by TRP 2. The UE can send independent PUSCH / PUCCH for each of TRP 1 and TRP 2.

[0181] The UE can identify PUSCH (or PUCCH) received by DCI scheduling based on different CORESETs (or CORESETs belonging to different CORESET groups) as PUSCH (or PUCCH) to be sent to different TRPs or PUSCH (or PUCCH) for different TRPs. Additionally, the UL transmission method to different TRPs (e.g., PUSCH / PUCCH) can also be applied to UL transmissions to different panels belonging to the same TRP.

[0182] In this document, a CORESET group ID (or a CORESET pool index with the same meaning) may refer to index / identification information (e.g., ID) used to distinguish CORESETs from individual TRPs / panels. A CORESET group may refer to a group / union of CORESETs distinguished by the index / identification information (e.g., ID) used to distinguish CORESETs from individual TRPs / panels / CORESET group ID. For example, a CORESET group ID may be specific index information defined in a CORESET configuration. In other words, a CORESET group may be defined by an index configuration / indicator / defining defined in the CORESET configuration of each CORESET. Additionally / alternatively, a CORESET group ID may refer to index / identification information / indicators used to distinguish / identify CORESETs associated with each TRP / panel configuration / TRP / panel.

[0183] In this document, the CORESET group ID can be represented as a specific index / specific identification information / specific indicator used to distinguish / identify the CORESET configured / associated with each TRP / panel. The corresponding information can be configured / indicated via higher-layer signaling (e.g., RRC signaling, MAC-CE, etc.) and / or physical-layer signaling (e.g., DCI). For example, it can be configured / indicated that PDCCH detection is performed per CORESET group for each TRP / panel. It can be configured / indicated that UCI (e.g., CSI, HARQ-ACK / NACK, SR, etc.) and / or UL physical channel resources (e.g., PUCCH / PRACH / SRS resources) are managed / controlled individually per CORESET group for each TRP / panel. Additionally / alternatively, HARQ ACK / NACK (processing / retransmission) of PDSCH / PUSCH scheduled for each TRP / panel can be managed per CORESET group.

[0184] For example, the high-level parameter ControlResourceSet Information Element (IE) may include a CORESET-related ID (e.g., controlResourceSetID), a CORESET pool index (e.g., CORESETPoolIndex), the CORESET's time / frequency resource configuration, and TCI information related to the CORESET. For example, the CORESET pool index (e.g., CORESETPoolIndex) may be set to 0 or 1. In this disclosure, a CORESET group may correspond to a CORESET pool, and the CORESET group ID may correspond to a CORESET pool index (e.g., CORESETPoolIndex).

[0185] Regarding M-TRP transmission and reception in the Rel-17 NR standard, it supports M-TRP PDCCH / PDSCH single-frequency network (SFN) transmission, S-DCI-based M-TRP PUSCH repetitive transmission, and single PUCCH-based M-TRP PUCCH repetitive transmission. In these transmission methods, to enhance URLLC objectives and increase reliability, the same content (i.e., DCI / UL TB / UCI, etc.) is repeatedly transmitted. Specifically, M-TRP PDCCH repetitive transmission is performed based on TDM or FDM, M-TRP PDCCH / PDSCH SFN transmission is performed at the same time / frequency / layer, S-DCI-based M-TRP PUSCH repetitive transmission is performed based on TDM, and single PUCCH-based M-TRP PUCCH repetitive transmission is performed based on TDM.

[0186] First, the M-TRP PDCCH retransmission method based on S-DCI will be described.

[0187] In the NR Rel-17 standard, to support repeated transmission of M-TRP PDCCH, the UE is configured with multiple CORESETs with different TCI states (i.e., different QCL RSs), and multiple search space (SS) sets associated with each CORESET. For repeated transmission, the BS can instruct / configure the UE to link the SS set associated with one CORESET to the SS set associated with another CORESET. Therefore, the UE can identify PDCCH candidates that are repeatedly transmitting SS sets.

[0188] For example, if a UE is configured with two CORESETs: CORESET 0 and CORESET 1, then CORESET 0 and CORESET 1 are associated with SS set 0 and SS set 1 respectively, and SS set 0 and SS set 1 can be linked to each other. The UE can identify repeated transmission of the same DCI on PDCCH candidates in SS set 0 and SS set 1. Additionally, the UE can identify, based on specific rules, that a specific PDCCH candidate in SS set 0 and a specific PDCCH candidate in SS set 1 are paired to repeatedly transmit the same DCI. These two PDCCH candidates are called linked PDCCH candidates, and the UE can successfully decode the DCI as long as it correctly receives either of the two PDCCH candidates. However, when the UE receives a PDCCH candidate in SS set 0, the UE can use the QCL RS (i.e., DL beam) in the TCI state of CORESET 0 associated with SS set 0. When a PDCCH candidate is received in SS set 1, the UE can use the QCL RS (i.e., DL beam) in the TCI state of CORESET 1 associated with SS set 1. Therefore, the UE can use different beams to receive link PDCCH candidates.

[0189] Next, the M-TRP SFN PDCCH / PDSCH transmission method will be described.

[0190] As a form of M-TRP PDCCH retransmission, M-TRP can repeatedly transmit the same DCI via the same time / frequency / DMRS port, and this transmission method can be called SFN PDCCH transmission. However, for SFN PDCCH transmission, instead of configuring multiple CORESETs with different TCI states, the BS configures multiple TCI states within a single CORESET. When the UE receives a PDCCH candidate through the SS set associated with a single CORESET, the UE can use all the multiple configured TCI states to perform channel estimation on the PDCCH DMRS and attempt decoding.

[0191] In the aforementioned M-TRP PDSCH retransmission, the two TRPs repeatedly transmit the channel on different resources. However, if the two TRPs use the same resources, i.e., if they repeatedly transmit the same channel via the same frequency / time / layer (i.e., DMRS port), the channel reliability can be improved. In this case, since the retransmitted same channel is not separated by different resources, from the receiver's (e.g., UE) perspective, the channel can be combined and received as a single channel (e.g., composite channel) during transmission (i.e., in the air). For SFN PDSCH transmission, the UE can be configured with two DL TCI states to receive PDSCHDMRS.

[0192] Next, the S-DCI-based M-TRP PUSCH retransmission method will be described.

[0193] In the NR Rel-17 standard, for M-TRP PUSCH transmission based on S-DCI, the BS can configure two SRS sets for the UE. Each set indicates the UL Tx port and UL beam / QCL information for TRP 1 and TRP 2. Additionally, the BS can indicate the SRS resources of each SRS resource set through two SRI fields included in a single DCI, and can also indicate up to two PC parameter sets. For example, the first SRI field indicates the SRS resources and power control (PC) parameter set defined in SRS resource set 0, while the second SRI field indicates the SRS resources and PC parameter set defined in SRS resource set 1. The first SRI field provides the UE with the UL Tx port, PC parameter set, and UL beam / QCL information for TRP 1. Subsequently, the UE can perform PUSCH transmission on the TO corresponding to SRS resource set 0. Similarly, the second SRI field provides the UE with the UL Tx port, PC parameter set, and UL beam / QCL information for TRP 2. Subsequently, the UE can perform PUSCH transmissions on the TO corresponding to SRS resource set 1. In addition to the SRI field, the Transmit Precoding Matrix Indicator (TPMI), Phase Tracking Reference Signal (PTRS), and Transmit Power Control (TPC) fields have been expanded from single fields to two fields to allow individual indication for each TRP. Furthermore, a 2-bit SRS resource set indication field has been introduced. Therefore, a specific SRS set can be selected from two SRS sets to perform single transmit / receive point (STRP) PUSCH repetition transmissions, or two sets can be selected to perform M-TRP PUSCH repetition transmissions. Specifically, when the field is set to 00 or 01, it indicates SRS set 0 or SRS set 1 respectively, and the STRP PUSCH transmission corresponding to each set is performed. When the field is set to 10, it indicates (SRS set 0, SRS set 1), and M-TRP PUSCH transmissions are performed in the order of the indicated set pairs. That is, set 0 corresponds to the first PUSCH transmission timing (TO). When the field is set to 11, it indicates (SRS set 1, SRS set 0) and performs M-TRP PUSCH transfers in the order of the indicated set pairs. That is, set 1 corresponds to the first PUSCH TO.

[0194] Next, we will describe the M-TRP PUCCH retransmission method based on a single PUCCH resource.

[0195] In the NR Rel-17 standard, for M-TRP PUCCH transmissions based on a single PUCCH resource, the BS can enable / configure two spatial relationship information sets for the UE's single PUCCH resource (in the case of FR1, two PC parameter sets can be enabled / configured). When transmitting UL UCI on the PUCCH resource, each spatial relationship information set can be used to indicate the spatial relationship information of TRP 1 and TRP 2 to the UE respectively. For example, using the value indicated by the first spatial relationship information, the UE can be configured with the Tx beam / PC parameters of TRP 1 and perform PUCCH transmission on the TO corresponding to TRP 1 using the corresponding information. Similarly, using the value indicated by the second spatial relationship information, the UE can be configured with the Tx beam / PC parameters of TRP 2 and perform PUCCH transmission on the TO corresponding to TRP 2 using the corresponding information.

[0196] Furthermore, to support repeated transmission of M-TRP PUCCH, the configuration method has been enhanced to allow configuring two spatial relationship information entries for a PUCCH resource. Specifically, when configuring PC parameters such as PLRS, Alpha, P0, and the closed-loop index for each spatial relationship information entry, the spatial relationship RS can be configured. As a result, PC information and spatial relationship RS information corresponding to two TRPs can be configured using two spatial relationship information entries. Therefore, the UE uses the first spatial relationship information to transmit a UCI PUCCH (i.e., CSI, ACK / NACK, SR, etc.) in the first TO and uses the second spatial relationship information to transmit the same UCI PUCCH in the second TO. In this disclosure, a PUCCH resource configured with two spatial relationship information entries is referred to as an M-TRP PUCCH resource, while a PUCCH resource configured with a single spatial relationship information entry is referred to as an S-TRP PUCCH resource.

[0197] TCI (Transmission Configuration Indicator) Status / Beam Indicator

[0198] In the description of this disclosure, when transmitting / receiving data / DCI / UCI on a particular spatial, temporal, or frequency resource, using (or mapping) a particular TCI state (or TCI) may mean that, in the case of DL, the UE uses the QCL type and QCL RS indicated by the particular TCI state of the particular spatial, temporal, or frequency resource to estimate the channel from the DMRS, and then uses the estimated channel to receive / demodulate data / DCI / UCI.

[0199] When receiving / transmitting data / DCI / UCI on a specific spatial, temporal, or frequency resource, using (or mapping) a specific TCI state (or TCI) may mean: in the case of UL, it may mean that the UE uses the Tx beam and / or Tx power indicated by the specific TCI state of the specific spatial, temporal, or frequency resource to transmit / modulate DMRS and data / UCI.

[0200] The UL TCI status can include information about the UE's Tx beam or Tx power. Alternatively, the BS can configure spatial relationship information to the UE using other parameters besides the TCI status.

[0201] For example, the UL TCI status can be directly indicated to the UE via the UL-licensed DCI. Alternatively, the UL TCI status can refer to spatial relational information regarding the probe reference signal (SRS) resources indicated by the SRS Resource Indicator (SRI) field in the UL-licensed DCI. Alternatively, the UL TCI status can refer to the open-loop (OP) Tx power control parameters associated with the value indicated by the SRI field in the UL-licensed DCI.

[0202] Here, for example, OL Tx power control parameters may include j (indexes of OP parameters Po and alpha (up to 32 parameter value sets per cell), q_d (indexes of DL RS resources for path loss (PL) measurements (up to four measurements per cell)) and / or I (indexes of closed-loop power control processes (up to two processes per cell)).

[0203] For convenience, this disclosure assumes that two TRPs cooperate to perform transmit / receive operations, but this disclosure is not limited thereto. In other words, this disclosure is scalable and applicable to environments with three or more M-TRPs and environments where transmit / receive operations are performed with different panels or beams within the same TRP. The UE can identify different TRPs as different TCI states. When the UE transmits / receives data / DCI / UCI using TCI state 1, it means that the UE is transmitting / receiving data / DCI / UCI from or to TRP 1.

[0204] Typically, a TO (Transmission Time) refers to the individual channels transmitted at different times when multiple channels are time-division duplexed (TDM), the individual channels transmitted on different frequencies / RBs when multiple channels are frequency-division multiplexed (FDM), or the individual channels transmitted on different layers / beams / DMRS ports when multiple channels are space-division multiplexed (SDM). Each TO can be mapped to a TCI (Transmission Controlled Interchange) state. When the same channel is repeatedly transmitted, the complete data / DCI / UCI is transmitted on a TO, and the receiver can receive multiple TOs to increase the reception success rate.

[0205] Multi-TB PUSCH / PDSCH scheduling based on a single DCI

[0206] In Rel.17 NR, a single DCI can simultaneously schedule multiple PUSCH / PDSCH in high-frequency bands (above 5.26 GHz). For example, the Time Domain Resource Allocation (TDRA) field in the PUSCH scheduling DCI can indicate multiple TDRAs (i.e., multiple TOs) at once, and different TBs are transmitted via PUSCH on each TO. The Frequency Domain Resource Allocation (FDRA), Modulation and Coding Scheme (MCS), TPMI, and SRI values ​​of the DCI are applied to all scheduled TBs. In addition, the New Data Indicator (NDI) and Redundancy Version (RV) values ​​are indicated individually for each TB by the DCI, while the HARQ number is indicated as a single value, but increases sequentially from the initial TO in the order of the TOs.

[0207] STxMP (Simultaneous transmission across multiple panels)

[0208] To support Rel. 18 NR standardization, methods for UEs to simultaneously transmit multiple channels / RS of the same or different types are being discussed. Currently, traditional UEs are limited in their ability to transmit multiple channels / RS simultaneously (e.g., while a UE can simultaneously transmit multiple SRS resources from different SRS sets for UL beam measurement, it may not be able to transmit multiple PUSCHs simultaneously). However, in the future, this limitation may be relaxed, allowing advanced UEs to use multiple transmission panels to simultaneously transmit multiple channels or RSs; these UEs are referred to as STxMP UEs. For example, two PUSCHs corresponding to two UL TBs can be scheduled on the same RE. For the transmission of PUSCH 1 and PUSCH 2, spatial relation RS 1 and PC parameter set 1 (i.e., UL TCI state 1) are configured for PUSCH 1, and spatial relation RS 2 and PC parameter set 2 (i.e., UL TCI state 2) are configured for PUSCH 2. The UE transmits PUSCH 1 using panel 1 corresponding to UL TCI state 1, and transmits PUSCH 2 using panel 2 corresponding to UL TCI state 2.

[0209] When the BS schedules PUSCH via DCI, the BS can indicate whether PUSCH needs to be sent based on STxMP transmission, single-panel transmission, or M-TRP PUSCH repetitive transmission. The UE needs to have STxMP capability and needs to pre-enable STxMP mode via RRC signaling. For this purpose, the existing SRS resource set indication field can be redefined, or a new DCI field can be introduced.

[0210] Beam / CSI reports initiated by UEs related to Multiple Transmitter Receiver Point (MTRP) / Multiple Panel User Equipment (MPUE)

[0211] The events and related operations required for beam management / CSI reporting (related to MRP / MPUE) initiated by the UE are described.

[0212] In the following description, “beam” may refer to the source reference signal (RS) used for spatial filtering or spatial relationships, and may be interpreted as quasi-co-located (QCL) (Type-D) RS, TCI state (for DL / UL / joint transmission), or, in the case of UL, as spatial relationship RS. Beam measurement may refer to the measurement of signals (e.g., RS) transmitted and received through appropriate beamforming / beamforming.

[0213] In the current New Radio (NR) architecture, for the BM, the beam measurement / reporting method and beam activation / indication of the BS are defined. For example, the UE's beam measurement / reporting can be configured / indicated by the BS, and the BS can perform beam activation and beam indication for the UE based on the UE's beam measurement / reporting.

[0214] In NR Release 17 (Release 17), as shown in Table 6 below, group-based beam reporting in the MTRP environment, beam reporting considering MPUE, and the beam reporting scheme for supporting simultaneous transmission with multiple panels (STxMP) in Release 18 (Release 18) are defined.

[0215] [Table 6]

[0216] Based on Table 6, the beam reporting schemes considering MTRP and MP in BM can be summarized as follows.

[0217] (1) Beam Reporting Based on DL MTRP Group

[0218] (a) In version 17, (via RRC configuration) group-based beam reporting operations for L1-RSRP are introduced.

[0219] (b) A single CSI report may include N beam pairs. Each beam pair may include M beams, and different beams within each pair may be received simultaneously.

[0220] i. N_max = {1, 2, 3, 4} is the UE capability, and M = 2.

[0221] ii. CMR resource allocation

[0222] - Two CMR resource sets (CMR resource configuration for each P / SP / AP)

[0223] - Each beam pair reported in a single CSI report consists of M=2 CRI / SSBRI values, and each CRI / SSBRI indicates the CMR in a different CMR resource set.

[0224] iii. Differential L1-RSRP report as a UCI reduction scheme

[0225] - A 1-bit indicator of the CMR set associated with the largest RSRP among all groups can be included.

[0226] (2) UL MTRP STxMP Beam Report

[0227] (a) As a beam report based on version-17 group to support STxMP enhancements, it can be determined whether the reported CRI / SSBRI pair supports simultaneous transmission and reception or simultaneous transmission based on UE capabilities.

[0228] (3) UL STRP MP Beam Report

[0229] (a) Define the UE capability value index (i.e., C-ID), and the UE reports how many C-IDs the UE has.

[0230] (b) C-ID can be included in the beam report.

[0231] i. The corresponding C-ID is reported together with the best N BS Tx beams and the CRI / SSBRI associated with the L1-RSRP or L1-SINR as the corresponding RS receive quality value.

[0232] In the current beam measurement / reporting process, when the UE moves significantly or objects around the UE move significantly, beam measurement / reporting needs to be performed frequently in order to find the optimal beam. As a result, problems such as RS overhead, implementation burden associated with measurement / reporting through the UE, and increased power consumption may occur.

[0233] In the version-19 standardization discussion, the following series of procedures were agreed upon for standardization to introduce UE-initiated beam reporting operations based on the determination that the quality of the current beam has degraded or that a beam change is needed, and to perform beam indication based on the UE-initiated beam report.

[0234] To reduce overhead and / or latency, a UE-initiated / event-based Business Model is defined, assuming a unified TCI, while minimizing... Multiple locations utilize the existing CSI measurement / reporting configuration framework, and transmit individually within / between cells at frequency range 2 (FR2). The receiving point (STRP) is the target.

[0235] - UL signaling content for UE-initiated / event-based beam reporting for fast beam switching

[0236] - UL signaling design considering UE-initiated / event-driven characteristics of UE transmission primarily designed for beam reporting. Place / container

[0237] In such a scenario, this disclosure defines events used as references for UE-initiated beam (e.g., beam / CSI reporting). Current NR beam / CSI measurements / reports are performed according to the BS's configuration / instructions. This disclosure also proposes methods for allowing the BS to trust and apply the quality of new beam / CSI-RS measured and determined by the UE based on the defined events.

[0238] Suggestion 1

[0239] The UE can execute a UE-initiated beam / CSI report when the following events occur.

[0240] Scenario 1) Based on changes during simultaneous transmission / reception and / or changes in C-ID

[0241] (1) Group-based beam / CSI report: (a) When resources in each CMR resource set are mapped to C-ID implicitly / explicitly, the UE may send a group-based beam / CSI report if the C-ID value for the current pair becomes different when a new beam is applied.

[0242] For example, even if the UE has reported performing simultaneous reception using C-ID#0 and C-ID#1, if the UE rotation necessitates receiving two beams using only one specific C-ID, the UE can perform a UE-initiated beam report.

[0243] (b) Alternatively, when performing group-based beam reports based on RRC configuration, if the corresponding state changes, the UE may perform a UE-initiated beam report.

[0244] i. For example, if the UE determines that, for beam reports that can be received or transmitted simultaneously, the most recently reported beam pair can no longer be received or transmitted simultaneously at the current time, the UE can execute the UE-initiated beam report.

[0245] ii. For example, if a beam pair that was recently reported to be able to transmit and receive simultaneously is no longer able to transmit or receive simultaneously at least once at the current time, the UE may perform a UE-initiated beam report.

[0246] In this scenario, the availability or unavailability of an operation can be reported via indicators in the beam report. For example, because the beam report can indicate when the beam report was triggered by the UE, it can also be used for subsequent beam indication.

[0247] (2) Perform beam reporting based on maximum permissible exposure (MPE) report

[0248] Because the MPE report indicates that the use of the corresponding RS index or panel for UL transmission is restricted, the BS and UE may agree that the UE's preferred beam is included in the MPE report, or perform a beam report following the MPE report.

[0249] Scenario 2) Based on the quality of the current beam / CSI

[0250] (1) When the quality of the new beam / CSI is higher than that of the current beam / CSI, and / or when the quality of the current beam / CSI is lower than a threshold, the UE may perform a UE-initiated beam report.

[0251] (a) When multiple current beams exist, i. In the case of beam / RS corresponding to the activated TCI state, Beam reporting can be performed when a specific number [x] of quality values ​​meet the above conditions. The number [x] can refer to [x] quality values ​​indicating higher quality. For example, multiple TCI states can be activated for the UE, and the event condition can be determined based on the first [x] quality values ​​of the RSs for the multiple activated TCI states. For example, the UE can calculate a first measurement result value based on a measurement of an RS with at least the Xth highest quality activated TCI state, and determine whether the event condition is met based on the calculated first measurement result value. The value of x can be provided via higher-layer signaling (e.g., configuration information for beam measurement reporting).

[0252] Beam reporting can be performed when the (average) quality values ​​of all or some beams corresponding to an active TCI state satisfy the above conditions. For example, whether the event condition is satisfied can be determined based on all or some of the first [x] quality values. As an example, whether the event condition is satisfied can be determined based on one of the first [x] quality values. More specifically, whether the event condition is satisfied can be determined based on the measurement result (e.g., L1-RSRP) of the RS of the active TCI state with the lowest quality among the first [x] quality values. In other words, whether the event condition described below is satisfied can be determined based on the measurement of the RS of the active TCI state with the Xth highest quality among the quality values ​​of the RSs of multiple active TCI states.

[0253] ii. In the case of multiple TCIs or multiple serving beams, such as a unified TCI framework for MTRP, a single event condition or multiple event conditions can be determined by comparing the respective quality values ​​of the new beams corresponding to multiple TCIs, and an indicator indicating which TCI the corresponding event is applied to can be included in the beam report. Subsequent beam indication / updates can be applied to the TCI indicated by the indicator.

[0254] (b) For new beam / CSI quality, instantaneous values ​​or average values ​​can be used (depending on the situation / for some of the multiple new beam RS).

[0255] (2) Here, the current beam can refer to the RS of the TCI state applied after beam indication via MAC control element (CE) and / or DCI and after beam application time (BAT). Additionally, multiple current beams can refer to RS of up to eight active TCI states via MAC-CE and / or up to two indicated TCI states managed by the UE within a unified TCI framework. Furthermore, a new beam can refer to RS of the TCI state configured for channel measurement or beam management purposes.

[0256] Case 3) Based on the value of the dedicated beam / CSI-RS initiated for the UE

[0257] The BS can configure the beam / CSI-RS to be used as the trigger target for UE-initiated BM / CSI reports, instead of configuring the current beam / CSI-RS, and the UE can report one of the beam / CSI-RS when the quality of the beam / CSI-RS exceeds a threshold (without indicating a link relationship with the quality of the current beam / CSI).

[0258] Proposal 1 proposes conditions as the starting point for executing UE-initiated BM / CSI reports, whereby the UE performs a beam report to the BS only when a specific triggering condition is met, rather than the BS configuring / instructing the UE to perform a beam / CSI report. Further specific examples of cases 1), 2), and 3) of Proposal 1 will be described below.

[0259] Scenario 1) is a method of linking events to group-based reporting (with STxMP) and the MPUE's C-ID, where a beam / CSI report is performed when the configuration of the C-ID and beam / CSI-RS pair corresponding to the new beam / CSI-RS becomes different from before. Beam / CSI reports may be needed to reflect changes in support for simultaneous transmission and reception, or even when simultaneous transmission and reception are possible, changes in the panel performing simultaneous transmission and reception (i.e., when the C-ID changes). Even without an assigned C-ID, the above can be applied through schemes such as resource grouping for panels. As a concrete example, the following can be considered. In this case, reporting can be performed again for a CSI report configuration that has already been updated.

[0260] Version-15 Beamgroup Reporting: When beamgroup reporting is enabled, the UE reports two different CRIs or SSBRIs for the corresponding reporting instance (set for each report), and can support simultaneous reception based on this. In this case, when the most recently reported beam pair can no longer be received simultaneously at the current time, the UE can perform a UE-initiated beam report.

[0261] For version-17 Noncoherent Joint Transport (NCJT) CSI reports, there are two options.

[0262] - Option 1: The UE can be configured to report X (=0, 1, 2) CSIs associated with a single TRP measurement hypothesis and one CSI associated with an NCJT measurement hypothesis. In this case, reporting can be triggered by comparing the quality value (e.g., CQI) of the most recently reported CSI associated with NCJT with the quality value (e.g., CQI) of the CSI subjected to the event measurement, or based on the quality value for the CSI. Alternatively / additionally, the event triggering condition can be determined based on the corresponding PMI. For example, with regard to CQI, an event may be triggered and a CSI report may be performed even if there is no significant difference between the most recently reported CSI and the CSI subjected to the event measurement, or even if the two CSIs are similar, if the PMIs are different. In this case, information indicating the amount of change in the PMI that has become a specific index and / or CQI can be reported. In this case, whether the corresponding {CQI, PMI} is included in the report content can follow a pre-configured scheme, and the CQI can be a public CQI or a CQI specific to the corresponding CSI-RS. Alternatively, even if the PMI changes, the report may not be triggered if the CQI remains similar within a certain level.

[0263] - Option 2: The UE can be configured to report a CSI associated with the best of the NCJT measurement assumption and a single TRP measurement assumption. In this case, whether a quality value (e.g., CQI) is associated with NCJT can be determined by CRI and can be applied as a reference in a triggering scheme similar to Option 1. In this case, as in Option 1, CQI and / or PMI can be considered to configure the event.

[0264] Version-18 Coherent Joint Transmission (CJT) CSI Reporting: For CJT purposes, given CSI-RSs are aggregated, and measurements for the aggregated CSI-RSs are reported. Additionally, RRC configuration can be used to signal which CSI-RS combinations should be included in the CSI-RS aggregation. Therefore, a corresponding report can be triggered based on a threshold value for a given CSI-RS aggregation. Alternatively, when the UE determines that the performance (e.g., CQI) of a particular CSI-RS combination has improved by a specific level compared to the latest report, the UE can treat this improvement as an event and perform a report. In this case, information about the combination can be included in the report. Even in this case, an event can be defined such that, considering the corresponding PMI and / or in-phase components, when changes exist in the PMI and / or in-phase components, a CSI report is determined to be performed even if the performance is similar in terms of CQI.

[0265] Version-17 C-ID MPUE Report: Because the corresponding C-ID can be reported along with the best N BS Tx beams and the CRI / SSBRI associated with the L1-RSRP or L1-SINR as the received quality value of the corresponding RS, beam reporting can be triggered based on a comparison between the quality value in the latest report and the quality value for the new beam and / or based on changes in the corresponding C-ID.

[0266] Version-18 STxMP Report: In the corresponding group-based beam reports with STxMP, reports are made based on RRC to support resource pairs that can be received simultaneously, transmitted simultaneously, or transmitted and received simultaneously. For example, when the UE determines that a beam pair recently reported for supporting simultaneous reception or transmission is no longer simultaneously received or transmitted at the current time, the UE can execute a UE-initiated beam report. Similarly, when a beam pair recently reported as simultaneously transmit and receive is no longer simultaneously transmit or receive at least once, the UE can execute a UE-initiated beam report. In this case, available or unavailable operations can be reported in the beam report via indicators. For example, because the beam report can indicate situations where the beam report was triggered by the UE, it can also be used for subsequent beam indication.

[0267] Alternatively, the MPE report associated with the MPUE introduced in version 17 can include not only information about panels / RS with MPE issues but also preferred beam information, or beam reporting can be performed according to a predefined protocol following the MPF report.

[0268] Case 2) refers to determining the beam / CSI report trigger condition by comparing the quality value of the new beam / CSI with the quality value of the current beam / CSI. For example, when the performance of the current beam / CSI degrades compared to the newly measured beam / CSI, or when the quality of the new beam / CSI is better, a report including the corresponding beam quality value can be provided, and this report can be used for subsequent beam activation / indication. In this case, the event can be configured not only based on the quality of the current beam but also considering the activated beams. For example, the event condition can be configured based on the average quality value of multiple activated beams or based on the previous [x] quality values.

[0269] Furthermore, the quality of the new beam can be based not on a single instantaneous value, but on multiple measurement moments and multiple measurement samples / instances. This will be described in more detail in Proposal 2 below. For the corresponding purposes, the CSI report configuration or CMR / IMR set for UE-initiated beam / CSI reports can be configured separately in advance.

[0270] Unlike scenario 2), scenario 3) is not based on the current beam / CSI quality value, but rather refers to performing beam / CSI reporting by configuring a dedicated RS to trigger an event for a UE-initiated BM / CSI report when the quality value of the corresponding RS is equal to or greater than a specific level. For example, the advantage provided is that by configuring a specific beam / CSI for each TRP as dedicated, not only can STRP operations be performed based on the corresponding quality value, but operations involving multiple TRPs or reverse operations can also be performed.

[0271] Additionally, as specific examples of the current beam / CSI in case 2) and the dedicated beam / CSI in case 3), the indicated TCI states (up to two) based on the unified TCI framework of version 17 or version 18 can be considered. If two indicated TCI states are managed in the MTRP environment and beam suitability of the target channel / RS based thereon is applied, an MTRP-specific reportConfig (associated with two CMR sets) can be configured for UE-initiated beam reports. In this case, if a beam with quality better than the indicated TCI state associated with the specific CMR set is measured in a particular CMR set, a STRP beam report can be performed, and if a beam with quality better than both indicated TCI states is measured in both CMR sets, an MTRP beam report can be performed. Through this operation, a beam reporting scheme based on the indicated TCI state and the quality value of the new beam can be executed.

[0272] In the above scenario, due to the instantaneous changes in the Layer 1 (L1) quality value (e.g., L1-RSRP), events triggering beam / CSI reports may occur too frequently, potentially increasing reporting overhead and reducing the reliability of the corresponding reports. Therefore, as a method to compensate for this problem and ensure the reliability of the corresponding reports, Proposal 2, which can be implemented along with Proposal 1, is provided below.

[0273] Proposal 2

[0274] Proposal 2 relates to a method for improving reliability when beam / CSI reporting is performed due to an event. The options in Proposal 2 can be implemented individually, or at least two options can be implemented together.

[0275] (1) Option 1: A method for configuring the offset. The offset may be the same as or different from the threshold mentioned in Proposal 1 above. Alternatively, different thresholds / offsets may be configured for each beam / CSI-RS.

[0276] (2) Option 2: A method for determining based on measurements performed at multiple time points or multiple measurement samples.

[0277] In this scenario, the BS can configure a measurement window, and the UE can perform a beam / CSI report when an event occurs (continuously) a certain number of times or more within the measurement window.

[0278] In this case, the measurement window and the specific number of times to determine each case of Proposal 1 can be configured differently / individually.

[0279] (3) Option 3: A method for reporting confidence / accuracy-related values ​​along with corresponding content when performing beam / CSI reports.

[0280] As an example, average beam / CSI quality information used for the corresponding measurement can be reported (e.g., how many measurements were performed or for how long, C-ID report, etc.).

[0281] In the case of multiple TCIs in scenario 2 / 3, events may occur for one TCI or all TCIs due to comparisons between each corresponding current beam and the corresponding new beam. In this case, not only average beam quality can be included, but also the event occurrence probability based on multiple TCIs. Similarly, when defining events for simultaneous transmission, simultaneous reception, or simultaneous transmission and reception in scenario 1, the event occurrence probability for multiple samples / measurements can also be included.

[0282] (4) Option 4: A method in which beam / CSI reporting is performed when multiple cases of Proposal 1 as defined above are satisfied, rather than when only a single case is satisfied.

[0283] In this case, information indicating which situations to consider for beam reporting can be explicitly added to the report content (all of multiple situations or only a single situation among multiple situations can be reported), or beam / CSI reporting can be performed when all specific events indicated by the RRC configuration are met.

[0284] Proposal 2 aims to address the issue that when events are triggered based on quality values ​​or specific conditions as described in Proposal 1, beam quality values ​​can vary significantly due to instantaneous changes in L1 quality values, and thus event triggering can occur frequently, leading to increased overhead and reduced reliability of beam reporting. More specific examples of each option in Proposal 2 will be described below.

[0285] As in Option 1, it may be necessary to configure and operate not only the thresholds defined for each event individually, but also the offsets individually. For example, by considering the threshold (offset) separately, such as in the current (average) beam / CSI quality + threshold (offset), an event can be determined to have occurred when the corresponding value is lower than the new beam / CSI quality value. The threshold (offset) can be provided via higher-level signaling (e.g., configuration information for beam measurement reporting).

[0286] As a specific example of Option 1 of Proposal 2 being applied to Case 2 of Proposal 1, an event can be configured / defined to be satisfied if the quality of the new beam (e.g., L1-RSRP) is higher than the quality of the RS with the highest quality active TCI state X among multiple active TCI states configured for the UE by a threshold (offset) or more. The threshold (offset) and X can be provided via higher-level signaling (e.g., configuration information for beam measurement reporting).

[0287] Furthermore, instead of immediately executing a measurement report upon fulfillment of the conditions used to trigger an event, as in Option 2, the UE can determine when an event is fulfilled and can only execute a report if the same triggering condition is met a specific number of times M consecutively during a specific duration (time window) starting from the time point when the condition is met. The specific duration (time window) and M can be provided via higher-level signaling (e.g., configuration information for beam measurement reporting).

[0288] As an example of executing Options 1 and 2 together, an event can be defined / configured based on the number of instances within a specific time window where the quality of a new beam is determined to be higher than the quality of the UE's current beam by a threshold (offset) or more, exceeding M. At least one of the time window, threshold (offset), and M can be configured via higher-level signaling (e.g., configuration information for beam measurement reporting).

[0289] In option 3, as a method to increase the reliability of the corresponding report, the difference between the instantaneous or average quality of the new beam / CSI and the quality of the current beam / CSI can be reported. Alternatively, information on the confidence / accuracy of the dwell time period for the new beam / CSI can also be included.

[0290] In Option 4, instead of determining whether an event is satisfied based on only one of several conditions as defined in Proposal 1, multiple conditions can be considered. In this case, a beam / CSI report can only be executed if all conditions pre-configured via RRC are satisfied, or an indicator indicating which conditions are satisfied for each beam / CSI report can be additionally included in the report content. Alternatively, priorities can be assigned to specific conditions. Even when a lower-priority event is satisfied, a beam report may not be executed immediately until the conditions for a higher-priority event are satisfied. A lower-priority event can be triggered and executed when a higher-priority event is not satisfied within a specific time window.

[0291] Figure 8 The diagram illustrates a beam measurement reporting process according to an embodiment of this disclosure.

[0292] refer to Figure 8 The UE can receive higher-layer signaling (e.g., RRC signaling) from the network at least once. Higher-layer signaling may include configurations for various types of measurement reports for the UE. For example, higher-layer signaling may include configurations for beam measurement reports. Configurations for beam measurement reports may include information about the TCI status for beam measurement reports, information about the relevant RS, and / or information about one or more events related to a beam measurement report initiated by the UE.

[0293] One or more events may include at least one of a first event, a second event, and a third event, but this disclosure is not limited thereto.

[0294] A first event can be satisfied if the quality of a specific beam is higher than a first threshold or more than a first measurement obtained by the UE. The first measurement can be obtained based on a signal with at least the Xth highest quality among multiple signals associated with multiple active TCI states. At least one of the first threshold and X can be configured via higher-layer signaling. The specific beam can be a new beam different from the current beam.

[0295] A second event can be satisfied if the number of instances within a time window where the quality of a new beam is determined to be higher than the quality of the UE's current beam by a second threshold or more exceeds M. At least one of the time window, the second threshold, and M can be configured via higher-layer signaling.

[0296] A third event can be satisfied if the quality of the new beam is lower than the quality of the UE's current beam by a third threshold. The third threshold can be configured through configuration information.

[0297] The UE can perform beam measurement (815) based on the DL RS (810) sent from the network.

[0298] Based on the fact that at least one event is satisfied according to the beam measurement result, the UE can report the beam measurement result to the network (820).

[0299] Figure 9 The diagram illustrates the flow of a method performed by a UE according to an embodiment of the present disclosure.

[0300] refer to Figure 9 The UE can receive configuration information for beam measurement reporting via higher-layer signaling (905).

[0301] The UE can measure multiple signals (910). These multiple signals can be associated with multiple active TCI states of the UE, respectively. The multiple signals can be RSs for multiple active TCI states. The multiple active TCI states can be associated with multiple current beams configured for the UE.

[0302] The UE may send a beam measurement report initiated by the UE (915) based on the satisfaction of at least one of one or more events configured by the configuration information.

[0303] The UE can obtain a first measurement based on a signal with at least the Xth highest quality among multiple signals associated with multiple active TCI states. If the quality of a specific beam is higher than the obtained first measurement by a first threshold or more, the UE can determine that a first event among one or more events has been met. At least one of the first threshold and X can be configured via configuration information. The specific beam can be a new beam different from the current beam. The quality can be L1-RSRP.

[0304] One or more events may include a second event. A second event can be satisfied if the number of instances within a time window where the quality of the new beam is determined to be higher than the quality of the UE's current beam by a second threshold or more exceeds M. At least one of the time window, the second threshold, and M can be configured via configuration information.

[0305] One or more events may include a third event. A third event can be satisfied if the quality of the new beam is lower than the quality of the UE's current beam by a third threshold. The third threshold can be configured through configuration information.

[0306] Figure 10 The diagram illustrates the flow of a method performed by a BS according to an embodiment of the present disclosure.

[0307] refer to Figure 10 The BS can send configuration information (1005) for beam measurement reports to the UE via higher-layer signaling. The configuration information can be used to configure one or more events for the UE to receive beam measurement reports initiated by the UE.

[0308] The BS can send multiple signals (1010). These signals can be associated with multiple active TCI states of the UE, respectively. These signals can be RSs for multiple active TCI states. These active TCI states can be associated with multiple current beams configured for the UE.

[0309] The BS can receive beam measurement reports initiated by the UE from the UE.

[0310] One or more events may include a first event satisfying a first threshold or more, based on the quality of a specific beam being higher than a first measurement value of the UE. The first measurement value for the first event may be obtained based on a signal with at least the Xth highest quality among multiple signals associated with multiple active TCI states. At least one of the first threshold and X can be configured via configuration information. The specific beam may be a new beam different from the current beam. The quality may be L1-RSRP.

[0311] One or more events may include a second event. A second event can be satisfied if the number of instances within a time window where the quality of the new beam is determined to be higher than the quality of the UE's current beam by a second threshold or more exceeds M. At least one of the time window, the second threshold, and M can be configured via configuration information.

[0312] One or more events may include a third event. A third event can be satisfied if the quality of the new beam is lower than the quality of the UE's current beam by a third threshold. The third threshold can be configured through configuration information.

[0313] Figure 11 A communication system 1 applied to this disclosure is shown.

[0314] Reference Figure 11The communication system 1 includes wireless devices, base stations (BS), and networks. In this document, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may take the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and network may be implemented as wireless devices, and a particular wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0315] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0316] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or between BS 200 and BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0317] Figure 12 A wireless device applicable to this disclosure is shown.

[0318] Reference Figure 12 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {first wireless device 100 and second wireless device 200} can correspond to... Figure 11 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0319] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processor 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information relating to the operation of the processor 102. For example, the memory 104 may store software code including commands for performing some or all of the processes controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with radio frequency (RF) units. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0320] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third information / signal, and then transmit a radio signal including the third information / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth information / signal via the transceivers 206, and then store the information obtained by processing the fourth information / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, the memories 204 may store software code including commands for executing some or all of the processes controlled by the processors 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0321] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by (but are not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0322] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document can be implemented using firmware or software in the form of code, commands, and / or command sets.

[0323] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be configured with read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0324] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein via one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0325] Figure 13 Another example of a wireless device applied to this disclosure is shown. The wireless device may vary depending on usage / service (see reference). Figure 11 It is realized in various forms.

[0326] Reference Figure 13 Wireless devices 100 and 200 can correspond to Figure 12The wireless devices 100 and 200 are configured with various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 12 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 12 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory unit 130, and add-on components 140, and controls the overall operation of the wireless device. For example, control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in memory unit 130. Control unit 120 may transmit information stored in memory unit 130 to an external source (e.g., another communication device) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., another communication device) via communication unit 110 in memory unit 130 via a wireless / wired interface.

[0327] The additional component 140 can be configured differently depending on the type of wireless device. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be configured according to (but is not limited to) a robot ( Figure 11 100a), vehicles ( Figure 11 100b-1 and 100b-2), XR device ( Figure 11 100c), handheld device ( Figure 11 100d), home appliances ( Figure 11 100e), IoT devices ( Figure 11 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, AI servers / devices ( Figure 11 400), BS ( Figure 11 This can be achieved through 200 network nodes, etc. Wireless devices can be used in mobile or fixed locations depending on the use case / service.

[0328] exist Figure 13In wireless devices 100 and 200, all elements, components, units / parts, and / or modules may be interconnected via wired interfaces, or at least a portion thereof may be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 may be wired connected, and control unit 120 and first units (e.g., 130 and 140) may be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured as a collection of one or more processors. As an example, control unit 120 may be configured as a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory unit 130 may be configured as random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0329] Figure 14 The illustration shows a vehicle or autonomous vehicle applicable to this disclosure. The vehicle or autonomous vehicle may be a mobile robot, car, train, manned / unmanned aerial vehicle (AV), vessel, etc.

[0330] Reference Figure 14 The vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 13 Blocks 110 / 130 / 140.

[0331] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include an electronic control unit (ECU). Drive unit 140a enables the vehicle or autonomous vehicle 100 to move on a road. Drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering mechanism, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, battery, etc. Sensor unit 140c can acquire vehicle status, surrounding environment information, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, depth sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a determined path, and technologies for automatically setting a route if a destination is set, etc.

[0332] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate an autonomous driving path and driving plan from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can periodically or non-periodically acquire recent traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, sensor unit 140c can acquire vehicle status and / or surrounding environment information. Autonomous driving unit 140d can update the autonomous driving path and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving path, and / or driving plan to an external server. The external server can predict traffic information data using AI technology, etc., based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0333] The above embodiments correspond to combinations of the elements and features of this disclosure in a prescribed form. Furthermore, unless explicitly stated otherwise, each element or feature may be considered optional. Each element or feature may be implemented without combination with other elements or features. Moreover, embodiments of this disclosure can be implemented by partially combining elements and / or features together. The order of operations described for various embodiments of this disclosure may be modified. Some configurations or features of one embodiment may be included in another embodiment, or may replace corresponding configurations or features of another embodiment. Furthermore, it will be readily understood that embodiments are configured by combining claims not explicitly referenced in the appended claims, or may be included as new claims after filing the application.

[0334] Those skilled in the art will understand that this disclosure may be practiced in other specific forms besides those set forth herein without departing from the spirit and essential characteristics of this disclosure. Therefore, the above embodiments should be construed as illustrative rather than restrictive in all respects. The scope of this disclosure should be determined by the appended claims and their legal equivalents, and not by the foregoing description, and all changes falling within the meaning and scope of the appended claims are intended to be covered therewith.

[0335] Industrial applicability

[0336] This disclosure applies to UEs, BSs, or other devices in wireless mobile communication systems.

Claims

1. A method performed by a user equipment (UE), the method comprising: Receive configuration information for beam measurement reports via higher-level signaling; Measure multiple signals; as well as Based on the satisfaction of at least one of the one or more events configured through the configuration information, a beam measurement report initiated by the UE is sent. The plurality of signals are respectively associated with the states of the UE's multiple Active Transmission Configuration Indices (TCIs), and Wherein, the UE: A first measurement value is obtained based on the signal with at least the Xth highest quality among the multiple signals associated with the multiple active TCI states; and Based on the fact that the quality of a specific beam is higher than a first threshold or more than the obtained first measurement value, it is determined that a first event among the one or more events is satisfied.

2. The method according to claim 1, wherein, The multiple active TCI states are associated with multiple current beams configured for the UE, and The specific beam is a new beam that is different from the current beam.

3. The method according to claim 1, wherein, The configuration information is used to configure at least one of the first threshold and X.

4. The method according to claim 1, wherein, The plurality of signals are reference signals for the plurality of active TCI states.

5. The method according to claim 1, wherein, The quality is the Layer 1 Reference Signal Received Power (L1-RSRP).

6. The method according to claim 1, wherein, The one or more events include a second event, and The second event is satisfied when the number of instances in which the quality of a new beam is determined to be higher than the quality of the UE's current beam by a second threshold or more within a time window exceeds M.

7. The method according to claim 6, wherein, The configuration information is used to configure at least one of the time window, the second threshold, and M.

8. The method according to claim 1, wherein, The one or more events include a third event, and The third event is satisfied when the quality of the new beam is lower than the quality of the UE's current beam by a third threshold.

9. The method according to claim 1, wherein, The third threshold is configured using the configuration information.

10. A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 1.

11. An apparatus comprising: The memory stores instructions; as well as A processor configured to perform operations by executing the instructions. The operations of the processor include: Receive configuration information for beam measurement reports via higher-level signaling; Measuring multiple signals; and Based on the satisfaction of at least one of one or more events configured through the configuration information, a beam measurement report initiated by the sending device is generated. The plurality of signals are respectively associated with the states of multiple Active Transmission Configuration Indices (TCIs) of the device, and The device mentioned above: A first measurement value is obtained based on the signal with at least the Xth highest quality among the multiple signals associated with the multiple active TCI states; and Based on the fact that the quality of a specific beam is higher than a first threshold or more than the obtained first measurement value, it is determined that a first event among the one or more events is satisfied.

12. The device of claim 11, further comprising a transceiver configured to transmit or receive wireless signals under the control of the processor. in, The device is a user equipment (UE) in a wireless communication system.

13. The device according to claim 11, wherein, The device is a processing device configured to control a user equipment (UE) in a wireless communication system.

14. A method performed by a base station (BS), the method comprising: Configuration information for beam measurement reports is sent to the user equipment (UE) via higher-layer signaling; Send multiple signals; as well as Receive beam measurement reports initiated by the UE from the UE. Specifically, the configuration information is used to configure one or more events for the UE to receive beam measurement reports initiated by the UE. The plurality of signals are respectively associated with the multiple active transmission configuration index (TCI) states of the UE. Wherein, the one or more events include a first event satisfying the condition that the quality of a specific beam is higher than a first measurement value of the UE by a first threshold or more, and The first measurement value for the first event is obtained based on the signal with at least the Xth highest quality among the plurality of signals associated with the plurality of active TCI states.

15. A base station (BS), comprising: The memory stores instructions; as well as A processor configured to perform operations by executing the instructions. The operations of the processor include: Configuration information for beam measurement reports is sent to the user equipment (UE) via higher-layer signaling; Send multiple signals; and Receive beam measurement reports initiated by the UE from the UE. Specifically, the configuration information is used to configure one or more events for the UE to receive beam measurement reports initiated by the UE. The plurality of signals are respectively associated with the multiple active transmission configuration index (TCI) states of the UE. Wherein, the one or more events include a first event satisfying the condition that the quality of a specific beam is higher than a first measurement value of the UE by a first threshold or more, and The first measurement value for the first event is obtained based on the signal with at least the Xth highest quality among the plurality of signals associated with the plurality of active TCI states.

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