Method and apparatus for transmitting and receiving pusch in wireless communication system

Abstract

A method and apparatus for transmitting and receiving a PUSCH in a wireless communication system are disclosed. A method according to one embodiment of the present disclosure may comprise the steps of: receiving a first DCI that schedules a first PUSCH transmission and a second DCI that schedules a second PUSCH transmission, in which the first DCI and the second DCI are received from a first CORESET and a second CORESET having different CORESET pool indices, respectively; and performing the first PUSCH transmission and the second PUSCH transmission on the basis of the different spatial relationships RS.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving a Physical Uplink Shared Channel (PUSCH) in a wireless communication system. Background Art

[0002] A mobile communication system has been developed to provide voice services while ensuring user mobility. However, the mobile communication system has been extended to data services as well as voice services, and currently, the explosive growth of services has led to resource shortages, and users have demanded faster services, thus requiring more advanced mobile communication systems.

[0003] The overall requirement for the next generation of mobile communication systems should be able to support the accommodation of explosive data services, a significant increase in the transmission rate per user, the accommodation of a significantly increased number of connected devices, very low end-to-end latency and high energy efficiency. To this end, various technologies have been studied, including dual connectivity, massive multiple-input multiple-output (massive MIMO), in-band full-duplex, non-orthogonal multiple access (NOMA), ultra-wideband support, and device networking. Summary of the invention

[0004] Technical issues

[0005] The technical objective of the present disclosure is to provide a method and apparatus for transmitting and receiving a PUSCH (Physical Uplink Shared Channel).

[0006] In addition, an additional technical objective of the present disclosure is to provide a method and apparatus for determining a default beam (or spatial relation reference signal) in PUSCH transmission to multiple transmit reception points (TRPs).

[0007] The technical objectives achieved by the present disclosure are not limited to the above-mentioned technical objectives, and other technical objectives not described herein will be clearly understood by those skilled in the relevant art from the following description.

[0008] Technical Solution

[0009] A method performed by a user equipment (UE) in a wireless communication system according to one aspect of the present disclosure may include: receiving a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are received in a first control resource set (CORESET) and a second CORESET having different control resource set (CORESET) pool indexes, respectively; and performing the first PUSCH transmission and the second PUSCH transmission based on different spatial relation reference signals (RS). A first spatial relation RS for a specific PUCCH resource associated with the CORESET pool index of the first CORESET is used for the first PUSCH transmission.

[0010] According to another aspect of the present disclosure, a method performed by a base station in a wireless communication system may include: transmitting a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are transmitted in a first control resource set (CORESET) and a second CORESET having different control resource set (CORESET) pool indexes, respectively; and receiving the first PUSCH transmission and the second PUSCH transmission based on different spatial relation reference signals (RS). A first spatial relation RS for a specific PUCCH resource associated with the CORESET pool index of the first CORESET is used for the first PUSCH transmission.

[0011] Technical Effects

[0012] According to an embodiment of the present disclosure, in PUSCH transmission to M-TRP, a default beam (or spatial relationship reference signal) can be determined separately for each TRP.

[0013] In addition, according to an embodiment of the present disclosure, by separately determining a default beam (or a spatial relationship reference signal) for each TRP, it is possible to prevent the error that all PUSCHs are sent to a single TRP in M-TRP transmission.

[0014] Effects achievable by the present disclosure are not limited to the above-described effects, and other effects not described herein may be clearly understood by those skilled in the relevant art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are included as a part of the detailed description for understanding the present disclosure, provide embodiments of the present disclosure and describe technical features of the present disclosure through the detailed description.

[0016] Figure 1 The diagram shows a structure of a wireless communication system to which the present disclosure can be applied.

[0017] Figure 2 The figure illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0018] Figure 3 The diagram illustrates a resource grid in a wireless communication system to which the present disclosure may be applied.

[0019] Figure 4 The figure illustrates physical resource blocks in a wireless communication system to which the present disclosure can be applied.

[0020] Figure 5 The diagram illustrates a time slot structure in a wireless communication system to which the present disclosure can be applied.

[0021] Figure 6 Physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the physical channels are illustrated.

[0022] Figure 7 is a diagram illustrating a signaling procedure between a network and a UE for a PUSCH transmission and reception method according to an embodiment of the present disclosure.

[0023] Figure 8 is a diagram illustrating an operation of a UE for a PUSCH transmission and reception method according to an embodiment of the present disclosure.

[0024] Fig. 9 is a diagram illustrating an operation of a base station for a PUSCH transmission and reception method according to an embodiment of the present disclosure.

[0025] Fig.10 A block diagram of a wireless communication device according to an embodiment of the present disclosure is illustrated. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description to be disclosed by the accompanying drawings is intended to describe exemplary embodiments of the present disclosure, rather than to represent the only embodiment in which the present disclosure can be implemented. The following detailed description includes specific details to provide a complete understanding of the present disclosure. However, those skilled in the relevant art will appreciate that the present disclosure can be implemented without these specific details.

[0027] In some cases, well-known structures and devices may be omitted, or may be shown in the form of a block diagram based on the core functions of each structure and device in order to prevent ambiguity in the concepts of the present disclosure.

[0028] In the present disclosure, when an element is referred to as being "connected", "combined" or "linked" to another element, it may include an indirect connection relationship between another element and a direct connection relationship. In addition, in the present disclosure, the term "comprising" or "having" specifies the presence of the mentioned features, steps, operations, components and / or elements, but does not exclude the presence or addition of one or more other features, stages, operations, components, elements and / or groups thereof.

[0029] In the present invention, terms such as "first", "second", etc. are only used to distinguish one element from another element and are not used to limit the elements, and unless otherwise specified, they do not limit the order or importance between the elements. Therefore, within the scope of the present disclosure, the first element in an embodiment may be referred to as the second element in another embodiment, and similarly, the second element in an embodiment may be referred to as the first element in another embodiment.

[0030] The terms used in this disclosure are intended to describe specific embodiments rather than to limit the claims. As used in the description of the embodiments and the appended claims, the singular form is intended to include the plural form unless the context clearly indicates otherwise. The term "and / or" used in this disclosure may refer to one of the related enumerated items, or mean that it refers to and includes any and all possible combinations of two or more of them. In addition, unless otherwise stated, the " / " between words in the present invention has the same meaning as "and / or".

[0031] The present disclosure describes a wireless communication network or a wireless communication system, and operations performed in the wireless communication network may be performed in a process in which a device (e.g., a base station) controlling the corresponding wireless communication network controls the network and sends or receives signals, or may be performed in a process in which a terminal associated with the corresponding wireless network sends or receives signals between the network or the terminal.

[0032] In the present disclosure, sending or receiving a channel includes the meaning of sending or receiving information or signals through the corresponding channel. For example, sending a control channel means sending control information or control signals through the control channel. Similarly, sending a data channel means sending data information or data signals through the data channel.

[0033] Hereinafter, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In the downlink, the transmitter may be a part of a base station, and the receiver may be a part of a terminal. In the uplink, the transmitter may be a part of a terminal, and the receiver may be a part of a base station. The base station may be expressed as a first communication device, and the terminal may be expressed as a second communication device. The base station (BS) may be replaced by terms such as a fixed station, a node B, an eNB (evolved node B), a gNB (next generation node B), a BTS (base station transceiver system), an access point (AP), a network (5G network), an AI (artificial intelligence) system / module, an RSU (roadside unit), a robot, a drone (UAV: unmanned aerial vehicle), an AR (augmented reality) device, a VR (virtual reality) device, and the like. In addition, the terminal may be fixed or mobile, and may be replaced by terms such as UE (user equipment), MS (mobile station), UT (user terminal), MSS (mobile subscriber station), SS (subscriber station), AMS (advanced mobile station), WT (wireless terminal), MTC (machine type communication) device, M2M (machine to machine) device, D2D (device to device) device, vehicle, RSU (roadside unit), robot, AI (artificial intelligence) module, drone (UAV: unmanned aerial vehicle), AR (augmented reality) device, VR (virtual reality) device, etc.

[0034] The following description may be used for various radio access systems such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA may be implemented by, for example, UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA may be implemented by radio technologies such as GSM (Global System for Mobile Communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA may be implemented by radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) using E-UTRA, and LTE-A (Advanced) / LTE-A pro is an advanced version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an advanced version of 3GPP LTE / LTE-A / LTE-A pro.

[0035] In order to make the description clearer, the description is based on the 3GPP communication system (e.g., LTE-A, NR), but the technical idea of ​​the present disclosure is not limited to this. LTE means the technology after 3GPP TS (Technical Specification) 36.xxx version 8. Specifically, the LTE technology in or after 3GPP TS 36.xxx version 10 is called LTE-A, and the LTE technology in or after 3GPP TS 36.xxx version 13 is called LTE-A pro. 3GPP NR means the technology in or after TS 38.xxx version 15. LTE / NR can be referred to as a 3GPP system. "xxx" means the detailed number of the standard document. LTE / NR can generally be referred to as a 3GPP system. For the background technology, terms, abbreviations, etc. used to describe the present disclosure, reference can be made to the matters described in the standard documents disclosed before the present disclosure. For example, reference can be made to the following documents.

[0036] For 3GPP LTE, reference may be made to TS 36.211 (Physical Channels and Modulation), TS 36.212 (Multiplexing and Channel Coding), TS 36.213 (Physical Layer Procedures), TS 36.300 (Overall Description), and TS 36.331 (Radio Resource Control).

[0037] For 3GPP NR, you can refer to TS 38.211 (Physical channels and modulation), TS 38.212 (Multiplexing and channel coding), TS 38.213 (Physical layer procedures for control), TS 38.214 (Physical layer procedures for data), TS 38.300 (NR and NG-RAN (Next Generation Radio Access Network) overall description), and TS 38.331 (Radio Resource Control Protocol Specification).

[0038] Abbreviations of terms that may be used in the present disclosure are defined as follows.

[0039] -BM: Beam Management

[0040] -CQI: Channel Quality Indicator

[0041] -CRI: Channel State Information-Reference Signal Resource Indicator

[0042] -CSI: Channel State Information

[0043] -CSI-IM: Channel State Information-Interference Measurement

[0044] -CSI-RS: Channel State Information-Reference Signal

[0045] -DMRS: Demodulation Reference Signal

[0046] -FDM: Frequency Division Multiplexing

[0047] - FFT: Fast Fourier Transform

[0048] -IFDMA: Interleaved Frequency Division Multiple Access

[0049] -IFFT: Inverse Fast Fourier Transform

[0050] -L1-RSRP: Layer 1 reference signal received power

[0051] -L1-RSRQ: Layer 1 reference signal reception quality

[0052] -MAC: Media Access Control

[0053] -NZP: Non-Zero Power

[0054] - OFDM: Orthogonal Frequency Division Multiplexing

[0055] –PDCCH: Physical Downlink Control Channel

[0056] -PDSCH: Physical Downlink Shared Channel

[0057] -PMI: Precoding Matrix Indicator

[0058] -RE: Resource Element

[0059] -RI: Rank indicator

[0060] -RRC: Radio Resource Control

[0061] -RSSI: Received Signal Strength Indicator

[0062] - Rx: Receive

[0063] - QCL: Quasi Co-sited

[0064] -SINR: Signal to Interference and Noise Ratio

[0065] -SSB (or SS / PBCH block): Synchronization signal block (including PSS (primary synchronization signal), SSS (secondary synchronization signal) and PBCH (physical broadcast channel))

[0066] -TDM: Time Division Multiplexing

[0067] -TRP: Transmit and Receive Point

[0068] -TRS: Tracking Reference Signal

[0069] -Tx: Send

[0070] -UE: User Equipment

[0071] -ZP: Zero Power

[0072] Overall system

[0073] As more communication devices require higher capacity, there has been a demand for improved mobile broadband communications compared to existing radio access technologies (RATs). In addition, large-scale MTC (machine type communication) that provides various services anytime and anywhere by connecting multiple devices and things is also one of the main issues to be considered in the next generation of communications. In addition, the design of communication systems considering services / terminals that are sensitive to reliability and latency is also discussed. Therefore, the introduction of next-generation RATs considering eMBB (enhanced mobile broadband communication), mMTC (massive MTC), URLLC (ultra-reliable low-latency communication), etc. is discussed, and for convenience, the corresponding technology is referred to as NR in this disclosure. NR is an expression representing an example of 5G RAT.

[0074] The new RAT system including NR uses an OFDM transmission method or a transmission method similar thereto. The new RAT system may follow OFDM parameters different from those of LTE. Alternatively, the new RAT system follows the parameters of the existing LTE / LTE-A as is, but may support a wider system bandwidth (e.g., 100 MHz). Alternatively, one cell may support multiple parameter sets. In other words, terminals operating according to different parameter sets may coexist in one cell.

[0075] A parameter set corresponds to one subcarrier spacing in the frequency domain. As the reference subcarrier spacing is scaled by an integer N, different parameter sets can be defined.

[0076] Figure 1 The diagram illustrates a structure of a wireless communication system to which the present disclosure can be applied.

[0077] refer to Figure 1 , NG-RAN is configured with gNBs that provide the control plane (RRC) protocol side for the NG-RA (NG Radio Access) user plane (i.e., the new AS (Access Stratum) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and the UE. The gNBs are interconnected through the Xn interface. In addition, the gNBs are connected to the NGC (Next Generation Core) through the NG interface. More specifically, the gNB is connected to the AMF (Access and Mobility Management Power) through the N2 interface, and to the UPF (User Plane Function) through the N3 interface.

[0078] Figure 2 The diagram illustrates a frame structure in a wireless communication system to which the present disclosure may be applied.

[0079] The NR system may support multiple parameter sets. Here, the parameter set may be defined by subcarrier spacing and cyclic prefix (CP) overhead. Here, multiple subcarrier spacings may be derived by scaling the basic (reference) subcarrier spacing by an integer N (or, μ). In addition, although it is assumed that very low subcarrier spacings are not used in very high carrier frequencies, the parameter set used may be selected independently of the frequency band. In addition, various frame structures according to multiple parameter sets may be supported in the NR system.

[0080] In the following, OFDM parameter sets and frame structures that can be considered in the NR system are described. Multiple OFDM parameter sets supported in the NR system can be defined as shown in Table 1 below.

[0081] [Table 1]

[0082]

[0083] NR supports multiple parameter sets (or subcarrier spacing (SCS)) for supporting various 5G services. For example, when the SCS is 15kHz, it supports wide areas of traditional cellular bands; and when the SCS is 30kHz / 60kHz, it supports dense cities, lower latency and wider carrier bandwidth; and when the SCS is 60kHz or higher, it supports bandwidths exceeding 24.25GHz to overcome phase noise.

[0084] The NR band is defined as two types of frequency ranges (FR1, FR2). FR1, FR2 can be configured as shown in Table 2 below. In addition, FR2 may mean millimeter wave (mmW).

[0085] [Table 2]

[0086]

[0087] Regarding the frame structure in the NR system, the sizes of various fields in the time domain are expressed as T c =1 / (Δf max ·N f ) is a multiple of the time unit. Here, Δf max i is 480·10 3 Hz, and N f is 4096. Downlink and uplink transmissions are configured (organized) to have duration T f= 1 / (Δf max N f / 100)·T c =10ms radio frame. Here, the radio frame is configured with 10 subframes, each of which has T sf =(Δf max N f / 1000)·Tc In this case, there may be one frame set for the uplink and one frame set for the downlink. Furthermore, the transmission in the i-th uplink frame from the terminal should start T earlier than the corresponding downlink frame in the corresponding terminal. TA =(N TA +N TA,offset )T c For subcarrier spacing configuration μ, the time slots are arranged in n subframes. s μ ∈{0,..., N slot subframe,μ -1} and in the radio frame the number is incremented by n s,f μ ∈{0,..., N slot frame,μ -1}. A time slot is configured with N symb slot consecutive OFDM symbols, and N symb slot Determined according to CP. Time slot n in a subframe s μ The beginning of the OFDM symbol n in the same subframe s μ N symb slot All terminals may not perform transmission and reception at the same time, which means that all OFDM symbols of a downlink time slot or an uplink time slot may not be used.

[0088] Table 3 shows the number of OFDM symbols per time slot in a normal CP (N symb slot ), the number of time slots per radio frame (N slot frame,μ ) and the number of time slots per subframe (N slot subframe,μ ), and Table 4 represents the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.

[0089] [Table 3]

[0090]

[0091] [Table 4]

[0092]

[0093] Figure 2 This is an example of μ=2 (SCS is 60kHz), see Table 3, 1 subframe can include 4 time slots. Figure 21 subframe = {1, 2, 4} shown in is an example, and the number of slots that can be included in 1 subframe is defined as in Table 3 or Table 4. In addition, a mini-slot may include 2, 4, or 7 symbols or more or less symbols.

[0094] Regarding the physical resources in the NR system, antenna ports, resource grids, resource elements, resource blocks, carrier parts, etc. can be considered. Hereinafter, the physical resources that can be considered in the NR system will be described in detail.

[0095] First, regarding antenna ports, antenna ports are defined so that the channel carrying symbols in the antenna port can be inferred from the channel carrying other symbols in the same antenna port. When the large-scale properties of the channel on which the symbols in one antenna port are carried can be inferred from the channel carrying the symbols of another antenna port, the two antenna ports can be said to be in a QC / QCL (quasi-co-located or quasi-co-located) relationship. In this case, the large-scale properties include at least one of delay spread, Doppler spread, frequency shift, average received power, and receive timing.

[0096] Figure 3 A resource grid in a wireless communication system to which the present disclosure may be applied is illustrated.

[0097] refer to Figure 3 , which graphically depicts a resource grid configuration with N in the frequency domain RB μ N sc RB subcarriers, and one subframe is configured with 14·2 μ OFDM symbols, but not limited to this. In the NR system, the transmitted signal consists of 2 μ N symb （μ） OFDM symbols and N RB μ N sc RB Here, N RB μ ≤ N RB max,μ . N RB max,μ represents the maximum transmission bandwidth, which may differ between uplink and downlink and between parameter sets. In this case, one resource grid can be configured for each μ and antenna port p. Each element of the resource grid for μ and antenna port p is called a resource element and is uniquely identified by an index pair (k, l'). Here, k = 0, ..., N RB μ N sc RB-1 is the index in the frequency domain, and l'=0,...,2 μ N symb （μ） -1 refers to the symbol position in the subframe. When referencing resource elements in a slot, an index pair (k, l) is used. Here, l = 0, ..., N symb μ -1. The resource element (k, l') for μ and antenna port p corresponds to the complex value a k,l' （p,μ） When there is no risk of confusion or when no specific antenna port or parameter set is specified, the indices p and μ may be dropped and the complex value may be a k,l' （p） or a k,l' In addition, a resource block (RB) is defined as N sc RB =12 consecutive subcarriers.

[0098] Point A serves as a common reference point for the resource block grid and is obtained as follows.

[0099] -OffsetToPointA for the primary cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping with the SS / PBCH block, which is used by the terminal for initial cell selection. Assuming a subcarrier spacing of 15kHz for FR1 and a subcarrier spacing of 60kHz for FR2, it is expressed in resource blocks.

[0100] -absoluteFrequencyPointA represents the frequency position of point A, expressed in ARFCN (Absolute Radio Frequency Channel Number).

[0101] For subcarrier spacing configuration μ, the common resource blocks are numbered from 0 upwards in the frequency domain. The center of subcarrier 0 of common resource block 0 for subcarrier spacing configuration μ is the same as "point A". Common resource block number n for subcarrier spacing configuration μ in the frequency domain CRB μ The relationship between and resource elements (k, l) is given by the following equation 1.

[0102] [Formula 1]

[0103]

[0104] In Equation 1, k is defined relative to point A, so that k = 0 corresponds to a subcarrier centered at point A. Physical resource blocks are numbered from 0 to N in a bandwidth part (BWP). BWP,i size,μ -1 numbering and i is the number of the BWP. Physical resource block n in BWP iPRB and public resource block n CRB The relationship between is given by the following formula 2.

[0105] [Formula 2]

[0106]

[0107] N BWP,i start,μ is the common resource block where the BWP starts relative to common resource block 0.

[0108] Figure 4 The figure illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied. Figure 5 The diagram illustrates a time slot structure in a wireless communication system to which the present disclosure may be applied.

[0109] refer to Figure 4 and Figure 5 , a slot includes a plurality of symbols in the time domain. For example, for a normal CP, 1 slot includes 7 symbols, but for an extended CP, 1 slot includes 6 symbols.

[0110] A carrier includes multiple subcarriers in the frequency domain. An RB (resource block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (bandwidth part) is defined as multiple consecutive (physical) resource blocks in the frequency domain and may correspond to one parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed through activated BWPs, and only one BWP may be activated for one terminal. In a resource grid, each element is called a resource element (RE) and may map one complex symbol.

[0111] In the NR system, each component carrier (CC) can support up to 400MHz. If a terminal operating in such a wideband CC always operates to turn on the radio frequency (FR) chip for the entire CC, the terminal battery consumption may increase. Alternatively, when considering multiple application scenarios operating in one wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different parameter sets (e.g., subcarrier spacing, etc.) may be supported in each frequency band in the corresponding CC. Alternatively, each terminal may have different capabilities for the maximum bandwidth. Taking this into account, the base station may instruct the terminal to operate only in part of the bandwidth, rather than in the full bandwidth of the wideband CC, and for convenience, the corresponding part of the bandwidth is defined as a bandwidth part (BWP). The BWP may be configured with continuous RBs on the frequency axis and may correspond to a parameter set (e.g., subcarrier spacing, CP length, slot / microslot duration).

[0112] At the same time, even in one CC configured to the terminal, the base station can configure multiple BWPs. For example, a BWP occupying a relatively small frequency domain can be configured in the PDCCH monitoring time slot, and the PDSCH indicated by the PDCCH can be scheduled in a larger BWP. Alternatively, when the UE is congested in a specific BWP, other BWPs can be configured for some terminals for load balancing. Alternatively, considering the frequency domain inter-cell interference elimination between adjacent cells, etc., some full-bandwidth middle spectrums can be excluded, and BWPs on two edges can be configured in the same time slot. In other words, the base station can configure at least one DL / UL BWP to a terminal associated with a broadband CC. The base station can activate at least one DL / UL BWP in the configured DL / UL BWP at a specific time (through L1 signaling or MAC CE (control element) or RRC signaling, etc.). In addition, the base station can indicate switching to other configured DL / UL BWPs (through L1 signaling or MAC CE or RRC signaling, etc.). Alternatively, based on a timer, when the timer value expires, it can switch to a determined DL / UL BWP. Here, the activated DL / UL BWP is defined as the active DL / UL BWP. However, when the terminal performs the initial access procedure or sets up the RRC connection, the configuration on the DL / UL BWP may not be received, so the DL / UL BWP assumed by the terminal in these cases is defined as the initial active DL / UL BWP.

[0113] Figure 6 Physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the physical channels are illustrated.

[0114] In a wireless communication system, a terminal receives information from a base station through a downlink and transmits information to the base station through an uplink. The information sent and received by the base station and the terminal includes data and various control information, and there are various physical channels according to the type / purpose of the information they send and receive.

[0115] When the terminal is turned on or newly enters a cell, it performs an initial cell search including synchronization with a base station (S601). For the initial cell search, the terminal can synchronize with the base station by receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station, and obtain information such as a cell identifier (ID). Then, the terminal can obtain broadcast information in the cell by receiving a physical broadcast channel (PBCH) from the base station. At the same time, the terminal can check the downlink channel status by receiving a downlink reference signal (DL RS) in the initial cell search phase.

[0116] The terminal that has completed the initial cell search may obtain more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to information carried in the PDCCH (S602).

[0117] Meanwhile, when the terminal accesses the base station for the first time or has no radio resources for signal transmission, it may perform a random access (RACH) procedure on the base station (S603 to S606). For the random access procedure, the terminal may send a specific sequence as a preamble through a physical random access channel (PRACH) (S603 and S605), and may receive a response message to the preamble through a PDCCH and a corresponding PDSCH (S604 and S606). The contention-based RACH may additionally perform a contention resolution procedure.

[0118] The terminal that subsequently performs the above process may perform PDCCH / PDSCH reception (S607) and PUSCH (Physical Uplink Shared Channel) / PUCCH (Physical Uplink Control Channel) transmission (S608) as a general uplink / downlink signal transmission process. Specifically, the terminal receives downlink control information (DCI) through the PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and the format varies according to its purpose of use.

[0119] At the same time, the control information sent by the terminal to the base station through the uplink or received by the terminal from the base station includes downlink / uplink ACK / NACK (acknowledgement / non-acknowledgement) signal, CQI (channel instruction indicator), PMI (precoding matrix indicator), RI (rank indicator), etc. For the 3GPP LTE system, the terminal can send the above-mentioned CQI / PMI / RI and other control information through PUSCH and / or PUCCH.

[0120] Table 5 shows an example of the DCI format in the NR system.

[0121] [Table 5]

[0122]

[0123] Referring to Table 5, DCI formats 0_0, 0_1, and 0_2 may include resource information (e.g., UL / SUL (supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), information related to a transport block (TB) (e.g., MCS (modulation coding and scheme), NDI (new data indicator), RV (redundancy version), etc.), information related to HARQ (hybrid-automatic repeat and request) (e.g., process number, DAI (downlink assignment index), PDSCH-HARQ feedback timing, etc.), information related to multiple antennas (e.g., DMRS sequence initialization information, antenna port, CSI request, etc.), power control information related to scheduling of PUSCH (e.g., PUSCH power control, etc.), and control information included in each DCI format may be predefined.

[0124] DCI format 0_0 is used to schedule PUSCH in one cell. Information included in DCI format 0_0 is CRC (Cyclic Redundancy Check) scrambled by C-RNTI (Cell Radio Network Temporary Identifier) ​​or CS-RNTI (Configured Scheduling RNTI) or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI) and transmitted.

[0125] DCI format 0_1 ​​is used to indicate the scheduling of one or more PUSCHs or to configure grant (CG) downlink feedback information to a terminal in one cell. The information included in DCI format 0_1 ​​is scrambled and transmitted by C-RNTI or CS-RNTI or SP-CSI-RNTI (semi-persistent CSI RNTI) or MCS-C-RNTI.

[0126] DCI format 0_2 is used to schedule PUSCH in one cell. Information included in DCI format 0_2 is scrambled and transmitted by C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

[0127] Next, DCI formats 1_0, 1_1 and 1_2 may include resource information (e.g., frequency resource allocation, time resource allocation, VRB (virtual resource block) -PRB (physical resource block) mapping, etc.), information related to transport blocks (TBs) (e.g., MCS, NDI, RV, etc.), information related to HARQ (e.g., process number, DAI, PDSCH-HARQ feedback timing, etc.), information related to multiple antennas (e.g., antenna ports, TCI (transmission configuration indicator), SRS (sounding reference signal) requests, etc.), information related to PUCCH scheduling regarding PDSCH (e.g., PUCCH power control, PUCCH resource indicator, etc.), and the control information included in each DCI format may be predefined.

[0128] DCI format 1_0 is used to schedule PDSCH in one DL cell. Information included in DCI format 1_0 is CRC scrambled and transmitted by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0129] DCI format 1_1 is used to schedule PDSCH in one cell. Information included in DCI format 1_1 is CRC scrambled and transmitted by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0130] DCI format 1_2 is used to schedule PDSCH in one cell. Information included in DCI format 1_2 is CRC scrambled and transmitted by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0131] Quasi-co-located (QCL)

[0132] Antenna ports are defined so that the channel through which symbols in that antenna port are transmitted can be inferred from the channels through which other symbols in the same antenna port are transmitted. Two antenna ports are said to be in a QC / QCL (quasi-co-located or quasi-co-located) relationship when the properties of the channel carrying symbols in one antenna port can be inferred from the channels carrying symbols in other antenna ports.

[0133] Here, the channel properties include at least one of delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, or spatial RX parameters. Here, the spatial Rx parameters mean spatial (Rx) channel property parameters such as angle of arrival.

[0134] The terminal may configure in the higher layer parameter PDSCH-Config a list of up to M TCI-State configurations to decode the PDSCH from the detected PDCCH with the expected DCI for the corresponding terminal and a given serving cell. M depends on the UE capabilities.

[0135] Each TCI-State includes parameters for configuring a quasi-co-location relationship between one or two ports of a DL reference signal and a DM-RS of a PDSCH.

[0136] The quasi co-location relationship is configured by a higher layer parameter qcl-Type1 for the first DL RS and qcl-Type2 (if configured) for the second DL RS. For two DL RSs, the QCL type is different regardless of whether the reference is the same DL RS or different DL RSs.

[0137] The quasi co-location type corresponding to each DL RS is given by the higher layer parameter qcl-Type of QCL-Info and can take one of the following values.

[0138] – “QCL-TypeA”: {Doppler shift, Doppler spread, average delay, delay spread}

[0139] – “QCL-TypeB”: {Doppler shift, Doppler spread}

[0140] – “QCL-TypeC”: {Doppler shift, average delay}

[0141] – “QCL-TypeD”: {Spatial Rx parameters}

[0142] For example, when the target antenna port is a specific NZP CSI-RS, the corresponding NZP CSI-RS antenna port may be indicated / configured to be quasi-co-located with a specific TRS with respect to QCL-Type A and quasi-co-located with a specific SSB with respect to QCL-Type D. The terminal receiving such an indication / configuration may receive the corresponding NZP CSI-RS TRS by using the Doppler and delay values ​​measured in QCL-TypeA, and apply the Rx beam used to receive the QCL-TypeD SSB to the reception of the corresponding NZP CSI-RS.

[0143] The UE may receive an activation command via MAC CE signaling, which is used to map up to 8 TCI states to code points of the DCI field “Transmission Configuration Indication”.

[0144] Operations related to multiple TRPs

[0145] The coordinated multi-point (CoMP) scheme refers to a scheme in which multiple base stations exchange or utilize channel information (e.g., RI / CQI / PMI / LI (layer indicator), etc.) fed back by a terminal (e.g., using an X2 interface) and cooperatively send it to the terminal to effectively control interference. Depending on the scheme used, CoMP can be classified into joint transmission (JT), coordinated scheduling (CS), coordinated beamforming (CB), dynamic point selection (DPS), dynamic point blocking (DPB), etc.

[0146] The M-TRP transmission scheme in which M TRPs send data to one terminal can be mainly classified into i) eMBB M-TRP transmission, a scheme for improving the transmission rate, and ii) URLLC M-TRP transmission, a scheme for increasing the reception success rate and reducing the delay.

[0147] In addition, regarding DCI transmission, the M-TRP transmission scheme can be classified into i) M-TRP transmission based on M-DCI (multiple DCIs), where each TRP transmits different DCIs, and ii) M-TRP transmission based on S-DCI (single DCI), where one TRP transmits DCI. For example, for S-DCI-based M-TRP transmission, all scheduling information about data transmitted by M TRPs should be delivered to the terminal through one DCI, which can be used in an ideal backhaul (ideal BH) environment, where dynamic cooperation between two TRPs is possible.

[0148] The UE may recognize a PUSCH (or PUCCH) scheduled by a DCI received in different control resource sets (CORESETs) (or CORESETs belonging to different CORESET groups) as a PUSCH (or PUCCH) sent to a different TRP, or may recognize a PDSCH (or PDCCH) from a different TRP. In addition, the method described below for UL transmissions (e.g., PUSCH / PUCCH) sent to different TRPs may be equivalently applied to UL transmissions (e.g., PUSCH / PUCCH) sent to different panels belonging to the same TRP.

[0149] Hereinafter, the CORESET group ID described / mentioned in the present disclosure may refer to an index / identification information (e.g., ID, etc.) of a CORESET distinguished for each TRP / panel. In addition, a CORESET group may be a group / union of CORESETs distinguished by an index / identification information (e.g., ID) / CORESET group ID, etc., for distinguishing a CORESET for each TRP / panel. In an example, the CORESET group ID may be specific index information defined in a CORESET configuration. In this case, a CORESET group may be configured / indicated / defined by an index defined in a CORESET configuration for each CORESET. Additionally / alternatively, a CORESET group ID may refer to an index / identification information / indicator, etc., for distinguishing / identifying between CORESETs configured / associated with each TRP / panel. Hereinafter, the CORESET group ID described / mentioned in the present disclosure may be represented by being replaced with a specific index / specific identification information / specific indicator, which is used to distinguish / identify between CORESETs configured / associated with each TRP / panel. The CORESET group ID, i.e., a specific index / specific identification information / specific indicator for distinguishing / identifying between CORESETs configured / associated with each TRP / panel, may be configured / indicated to the terminal through higher layer signaling (e.g., RRC signaling) / L2 signaling (e.g., MAC-CE) / L1 signaling (e.g., DCI), etc. In an example, it may be configured / indicated so that PDCCH detection will be performed per TRP / panel (i.e., per TRP / panel belonging to the same CORESET group) in units of the corresponding CORESET group. Additionally / alternatively, it may be configured / indicated so that uplink control information (e.g., CSI, HARQ-A / N (ACK / NACK), SR (scheduling request)) and / or uplink physical channel resources (e.g., PUCCH / PRACH / SRS resources) are separated and managed / controlled per TRP / panel (i.e., per TRP / panel belonging to the same CORESET group) in units of the corresponding CORESET group. Additionally / alternatively, HARQ A / N (processing / retransmission) for PDSCH / PUSCH, etc. scheduled per TRP / panel may be managed per corresponding CORESET group (ie, per TRP / panel belonging to the same CORESET group).

[0150] For example, a higher layer parameter ControlResourceSet Information Element (IE) is used to configure a time / frequency control resource set (CORESET). In an example, a control resource set (CORESET) may be related to detection and reception of downlink control information. The ControlResourceSet IE may include an ID related to the CORESET (e.g., controlResourceSetID) / an index of a CORESET pool for the CORESET (e.g., CORESETPoolIndex) / time / frequency resource configuration of the CORESET / TCI information related to the CORESET, etc. In an example, the index of the CORESET pool (e.g., CORESETPoolIndex) may be configured as 0 or 1. In the description, a CORESET group may correspond to a CORESET pool, and a CORESET group ID may correspond to a CORESET pool index (e.g., CORESETPoolIndex).

[0151] Release 17 NR standard supports (1) MTRP PDCCH retransmission, (2) MTRP PDCCH single frequency network (SFN) transmission, (3) MTRP PDSCH SFN transmission, (4) MTRP PUSCH retransmission based on S-DCI, and (4) MTRP PUCCH retransmission based on single PUCCH resource. These transmission techniques are URLLC target enhancements for improving reliability, and the same content (i.e., DCI or UL / DL TB or UCI) is repeatedly transmitted. In the case of MTRP PDCCH retransmission, it is repeatedly transmitted in TDM or FDM, MTRP PDCCH / PDSCH SFN are repeatedly transmitted at the same time / frequency / layer, MTRP PUSCH retransmission based on S-DCI is repeatedly transmitted in TDM, and MTRP PUCCH retransmission based on single PUCCH resource is repeatedly transmitted in TDM.

[0152] (1) MTRP PDCCH repeated transmission

[0153] For MTRP PDCCH repeated transmission, multiple CORESETs with different TCI states (i.e., different QCL RSs) are configured for the UE, and multiple SS sets are configured for the UE, all of which are connected / associated to the corresponding CORESETs. The base station instructs / configures the UE that the search space set (SS set) associated with one CORESET is linked with the SS set associated with another CORESET for repeated transmission, so that the UE learns that the PDCCH candidates of the corresponding SS set are repeatedly sent.

[0154] For example, assume that two CORESETs, CORESET 0 and 1, are configured for the UE, and CORESET 0 and 1 are associated to SS sets 0 and 1, respectively, and SS sets 0 and 1 are linked. The UE can recognize that the PDCCH candidate of SS set 0 and the PDCCH candidate of SS set 1 are repeatedly transmitting the same DCI, and through a specific rule, the UE can recognize that a specific PDCCH candidate of SS set 0 and a specific PDCCH candidate of SS set 1 are a pair established for repeatedly transmitting the same DCI. The two PDCCH candidates are called linked PDCCH candidates, and if the UE correctly receives any one of the two PDCCH candidates, the UE can successfully decode the corresponding DCI. However, when receiving PDCCH candidates of SS set 0, the QCL RS of the TCI state associated to COERSET 0 of SS set 0 (i.e., DL beam) is used, and when receiving PDCCH candidates of SS set 1, the QCL RS of the TCI state associated to COERSET 1 of SS set 1 (i.e., DL beam) is used, thereby receiving linked PDCCH candidates with different beams.

[0155] (2) MTRP SFN PDCCH repeated transmission

[0156] As a special case of MTRP PDCCH repetition transmission, multiple TRPs can repeatedly send the same DCI through the same time / frequency / DMRS port, which can be called SFN PDCCH transmission. However, for SFN PDCCH transmission, instead of configuring multiple CORESETs with different TCI states for the UE, the base station sets multiple TCI states to one CORESET. When the UE receives a PDCCH candidate through an SS set associated with one CORESET, it performs channel estimation on the PDCCH DMRS using all the multiple TCI states and attempts to decode.

[0157] (3) MTRP SFN PDSCH repeated transmission

[0158] When the MTRP PDSCH is repeatedly transmitted, the two TRPs repeatedly transmit the corresponding PDSCH on different resources. However, as a special case, if the resources used by the two TRPs are the same, that is, if the same channel is repeatedly transmitted through the same frequency, time and layer (that is, DMRS port), the reliability of the corresponding channel can be improved. In this case, the repeatedly transmitted same channel is received by merging in the air, and since the resources are not distinguished, it is identified as one channel from the receiver's perspective. For PDSCH SFN transmission, two DLTCI states for PDSCH DMRS reception can be configured.

[0159] (4) MTRP PUSCH repeated transmission based on S-DCI

[0160] For MTRP PUSCH transmission based on S-DCI, the base station configures two SRS sets for the UE, where each set is used to indicate the UL Tx port and UL beam / QCL information towards TRP 1 and TRP 2, respectively. In addition, the base station performs SRS resource indication for each SRS set through two SRI fields in one DCI, and can indicate up to two power control (PC) parameter sets. For example, the first SRI field can indicate the SRS resource and PC parameter set defined in SRS set 0, and the second SRI field can indicate the SRS resource and PC parameter set defined in SRS set 1. The UE is indicated with the UL Tx port, PC parameter set and UL beam / QCL information towards TRP 1 through the first SRI field, and performs PUSCH transmission at the transmission opportunity (TO) corresponding to SRS set 0 through these. Similarly, the UE is indicated with the UE UL Tx port, PC parameter set and UL beam / QCL information towards TRP 2 through the second SRI field, and performs PUSCH transmission in the TO corresponding to SRS set 1. Similarly, the UE is indicated by the second SRI field with the UE UL Tx port, PC parameter set, and UL beam / QCL information toward TRP 2, and performs PUSCH transmission in the TO corresponding to SRS set 1. Here, the TO corresponding to SRS sets 0, 1 is determined by one of the mapping methods configured by the base station among cyclic (beam) mapping and sequential (beam) mapping. For example, in the case of cyclic beam mapping, SRS set 0 and SRS set 1 are mapped alternately in the TO order. For example, if TO=4, TO 1, 2, 3, 4 are mapped to SRS sets 0, 1, 0, 1, respectively. On the other hand, sequential beam mapping maps one SRS set to two adjacent TOs, and then maps another SRS set to the next two adjacent TOs. For example, when TO=8, TO 1, 2, 3, 4, 5, 6, 7, 8 are mapped to SRS sets 0, 0, 1, 1, 0, 0, 1, 1, respectively. This mapping method is also applied to PUCCH repetition.

[0161] In addition to the SRI field, PMI (TPMI), phase tracking reference signal (PTRS), and transmission power control (TPC) fields can be sent for each TRP indication, so that the existing one field has been expanded to two fields. In addition, by introducing a 2-bit SRS resource set indication field, STRP PUSCH repetition transmission can be performed by selecting a specific one of the two SRS sets, and MTRP PUSCH repetition transmission can be performed by selecting both. That is, if the field is 00, 01, SRS set 0 and SRS set 1 are indicated respectively, and STRP PUSCH transmission corresponding to each SRS set is performed, and if it is 10, (SRS set 0, SRS set 1) is indicated, and MTRP PUSCH transmission is performed in the order of the indicated SRS set pairs. That is, set 0 corresponds to the first PUSCH TO. In the case of 11, (SRS set 1, SRS set 0) is indicated, and MTRP PUSCH transmission is performed in the order of the set pairs indicated therein. That is, set 1 corresponds to the first PUSCH TO.

[0162] (5) MTRP PUCCH repeated transmission based on a single PUCCH resource

[0163] The base station activates / configures two spatial relationship information in a single PUCCH resource for the UE for MTRP PUCCH transmission based on a single PUCCH resource. In this case, in the case of FR1, two PC (power control) parameter sets can be activated / configured. When the UE sends UL UCI through the corresponding PUCCH resource, each spatial relationship information is used to indicate the spatial relationship information toward TRP 1 and TRP 2, respectively. For example, the Tx beam / PC parameters toward TRP 1 are indicated to the UE by the value indicated in the first spatial relationship information, and the UE uses this information to perform PUCCH transmission in the TO corresponding to TRP 1. Similarly, the Tx beam / PC parameters toward TRP 2 are indicated to the UE by the value indicated in the second spatial relationship information, and the UE uses this information to perform PUCCH transmission in the TO corresponding to TRP 2.

[0164] In addition, for MTRP PUCCH repeated transmission, the configuration method has been improved so that two spatial relationship information can be configured in the PUCCH resources. That is, if PC parameters such as PLRS, Alpha, P0, and closed-loop index are set for each spatial relationship information, the spatial relationship RS can be configured. As a result, the PC information and spatial relationship RS information corresponding to the two TRPs can be configured through two spatial relationship information, and the UE uses the first spatial relationship information in TO 1 to send UCI (i.e., CSI, HARQ-ACK, scheduling request (SR)) in PUCCH, and uses the second spatial relationship information in TO 2 to send the same UCI (i.e., CSI, HARQ-ACK, SR) in PUCCH. In the present disclosure, a PUCCH resource with two sets of spatial relationship information is referred to as an MTRP PUCCH resource, and a PUCCH resource with one set of spatial relationship information is referred to as a STRP PUCCH resource.

[0165] In the method proposed in the present disclosure, using ( / mapping) a specific TCI state (or TCI) when receiving data / DCI / UCI for a specific frequency / time / space resource may mean, in the case of DL, estimating a channel from DMRS using a QCL type and QCL RS indicated by a corresponding TCI state in a frequency / time / space resource, and receiving / demodulating data / DCI using the estimated channel. In the case of UL, this may mean transmitting / modulating DMRS and data / UCI using a Tx beam and / or Tx power indicated by a corresponding TCI state in a frequency / time / space resource.

[0166] The UL TCI state includes the Tx beam and / or Tx power information of the UE, and can be configured for the UE by other parameters such as spatial relationship information, rather than the TCI state. The UL TCI state can be directly indicated in the UL grant DCI, or it can mean the spatial relationship information of the SRS resource indicated by the SRS resource indicator (SRI) field of the UL grant DCI. Alternatively, it can mean the open-loop (OL) Tx power control parameters linked to the values ​​indicated via the SRI field of the UL grant DCI (j: index for open-loop parameters Po and alpha (up to 32 parameter value sets per cell), q_d: index of the DL RS for path loss (PL) measurement (up to 3 measurements per cell), l: closed-loop power control process index (up to 2 processes per cell)).

[0167] In addition, in Release 17, not only the DL TCI state but also the UL TCI state can be indicated by DL DCI (e.g., DCI format 1-1 or 1-2), or only the UL TCI state can be indicated without DL TCI state indication. Therefore, the method for UL beam and PC (power control) configuration in the existing Release 15 / 16 is replaced by the UL TCI state indication method in Release 17. More specifically, in Release 17, one UL TCI state can be indicated by the TCI field of DL DCI, and the corresponding UL TCI state is applied to all PUSCHs and all PUCCHs after a certain time called beam application time, and can be applied to some or all of the indicated SRS resource sets.

[0168] Meanwhile, Release 18 discusses a method for UE to simultaneously transmit multiple channels / reference signals (RS) of the same type or multiple channels / RS of different types. In existing UEs, the operation of transmitting multiple channels / RS at a time is limited (for example, multiple SRS resources of different SRS sets can be simultaneously transmitted for UL beam measurement, but multiple PUSCHs cannot be simultaneously transmitted), however, in the case of future advanced UEs, this limitation will be relaxed, and multiple channels or RSs can be simultaneously transmitted using multiple transmission panels, and this transmission method can be called simultaneous transmission across multiple panels (STxMP), and such UEs can also be called STxMP UEs. For example, two PUSCHs corresponding to two UL TBs are scheduled on the same resource, and spatial relationship RS 1 and PC parameter set 1 (ie, UL TCI state 1) and spatial relationship RS2 and PC parameter set 2 (ie, UL TCI state 2) can be configured for PUSCH 1 and 2 transmission, respectively. In such a case, the UE can transmit PUSCH 1 using panel 1 corresponding to UL TCI state 1, and simultaneously transmit PUSCH 2 using panel 2 corresponding to UL TCI state 2.

[0169] When the base station schedules PUSCH through DCI, it can indicate whether PUSCH will be sent as STxMP, single panel, MTRPPUSCH repetition, etc. Of course, the UE must have STxMP capability and the STxMP mode must be enabled in advance through RRC signaling, etc. To this end, the existing SRS resource set indication field can be redefined and used, or a new DCI field can be introduced.

[0170] For ease of explanation, the present disclosure assumes collaborative transmission / reception between 2 TRPs and applies the proposed method, but it can be extended to a multi-TRP environment of 3 or more and can be extended to a multi-panel environment. Different TRPs can be identified by the UE as different TCI states, and when the UE receives / sends data / DCI / UCI using TCI state 1, it means that the UE receives / sends data / DCI / UCI from / to TRP 1.

[0171] In the present disclosure, a transmission opportunity (TO) may mean each channel transmitted at different times when multiple channels are TDMed, or each channel transmitted at different frequencies / RBs when FDMed, or each channel transmitted at different layers / beams / DMRS ports when SDMed. One TCI state may be mapped to each TO. When the same channel is transmitted repeatedly, the complete DCI / data / UCI is transmitted to one TO, and the receiving end may receive multiple TOs to increase the reception success rate.

[0172] Method for determining a default beam for MTRP-based uplink transmission

[0173] In the present disclosure, a beam can be simply interpreted as a TCI state (or TCI for short), and can also be interpreted as a QCL type-D RS within a TCI state (or TCI for short), and can also be interpreted as a spatial relationship reference signal. Therefore, performing uplink transmission (e.g., PUCCH, PUSCH) using a specific beam can be interpreted as performing uplink transmission based on the TCI state (or TCI for short) (or QCL type-D RS or spatial relationship RS) (ie, according to the direction of the corresponding RS).

[0174] In addition, for convenience of explanation, the present disclosure proposes a method by assuming a collaborative sending / receiving application between 2 TRPs, but it can be extended to 3 or more multi-TRP environments, and can also be extended to a multi-panel environment.

[0175] As described above, a UE supporting STxMP is able to schedule two PUSCHs to two multiple TRPs on the same resource, and is able to configure different beams (i.e., spatial relationship RS) for the transmission of these two PUSCHs. In this case, the UE is able to send the first PUSCH to the first TRP and the second PUSCH to the second TRP on the same resource using a separate panel corresponding to each beam.

[0176] In addition, according to the existing standards, the base station indicates two UL TCIs (or, in the same sense, spatial relationship information, spatial relationship RS, and PC (power control) sets) for UL MTRP repetition to the UE. Then, the UL TCI is mapped to TO according to one of the cyclic / sequential beam patterns configured by the base station, and the UE performs PUSCH / PUCCH repetition transmissions to the two TRPs according to the mapping. Here, the transmission occasion (TO) may mean one repetition transmission among the repetition transmissions of the uplink transmission. That is, in the following disclosure, TO may be interpreted as being replaced with one repetition (or actual repetition), and multiple TOs may be interpreted as being replaced with multiple repetitions. In addition, uplink transmissions in multiple TOs or uplink transmissions in one TO may be interpreted as being replaced with multiple repetitions or a single repetition for uplink transmission, respectively. In addition, a TO group can be interpreted as a group of repetitions.

[0177] As described above, when multiple CORESET pools are configured for MTRP based on Release-16 / 17 M-DCI (e.g., CORESET pool index 0 for TRP0, CORESET pool index 1 for TRP 1), PUSCH can be independently scheduled by CORESETs belonging to each CORESET pool. In the present disclosure, if the corresponding PUSCH (i.e., at least one PUSCH among multiple PUSCHs toward MTRP) is scheduled by DCI format 0-0, a method for determining a default beam (or a default spatial relationship RS) for PUSCH transmission is proposed.

[0178] According to the existing operation, when PUSCH is scheduled through DCI format 0-0 on a cell, since there is no field indicating the uplink beam in DCI format 0-0, the default beam is used for PUSCH transmission. Here, the default beam for PUSCH transmission is determined by the spatial relationship RS configured in the spatial relationship information of the PUSCCH resource with the lowest identifier (ID) among the PUCCH resources configured in the corresponding cell / BWP.

[0179] Here, the spatial setting for PUCCH transmission is provided by:

[0180] - the indicated TCI state (TCI-STATE) or TCI uplink state (TCI-UL-STATE);

[0181] - If the UE is configured with a single value for the PUCCH spatial relationship information identifier (pucch-SpatialRelationInfoId), the corresponding PUCCH spatial relationship information (PUCCH-SpatialRelationInfo);

[0182] - When the UE is provided with multiple values ​​for the PUCCH spatial relation information identifier (pucch-SpatialRelationInfoId), the spatial relation information for each PUCCH resource ID is transmitted via a PUCCH spatial relation activation / deactivation MAC control element (CE) (PUCCH spatial relation activation / deactivation MAC CE), an enhanced PUCCH spatial relation activation / deactivation MAC CE, or PUCCH spatial relation activation / deactivation for multiple TRP PUCCHs.

[0183] According to the above-mentioned existing operation, when MDCI-based MTRP transmission is configured and PUSCH is scheduled using DCI format 0-0, because the default beam is applied to one beam of the lowest ID PUCCH resource (i.e., spatial relationship RS), the following problem may occur: regardless of which TRP is scheduled using DCI format 0-0, PUSCH is only sent to one TRP (i.e., the beam corresponding to the lowest ID PUCCH resource). For example, when both TRPs schedule PUSCH transmission using DCI format 0-0, two PUSCHs can only be sent to one TRP with the same beam of the lowest ID PUCCH resource (i.e., spatial relationship RS). In addition, if the beam of the lowest ID PUCCH resource (i.e., spatial relationship RS) is directed to TRP 0 and PUSCH transmission is scheduled in TRP 1 with DCI format 0-0, two PUSCHs can only be sent in TRP 0, and vice versa.

[0184] According to the present disclosure, when DCI format 0-0 is received by a CORESET belonging to CORESET pool i (i.e., CORESET pool index i) (i is an integer greater than or equal to 0), and the corresponding DCI schedules PUSCH, the default beam of the corresponding PUSCH is determined to be the spatial relationship RS set in the spatial relationship information of the PUCCH resource with a specific ID associated with CORESET pool i.

[0185] Embodiment 1: When DCI format 0-0 is received by a CORESET belonging to CORESET pool i (i is an integer greater than or equal to 0) and the corresponding DCI schedules PUSCH, the default beam of PUSCH can be determined as the spatial relationship RS configured in the spatial relationship information of the PUCCH resource with the lowest ID among the PUCCH resources associated with CORESET pool i.

[0186] Here, the PUCCH resources associated with CORESET pool i can be configured in one of the following ways:

[0187] Alternative 1: The base station can configure an associated CORESET pool index for each PUCCH resource. For example, an associated CORESET pool index may be configured for each PUCCH resource via higher layer signaling (e.g., RRC signaling). As another example, an associated PUCCH resource may be configured for each CORESET pool index via higher layer signaling (e.g., RRC signaling).

[0188] Alternative solution 2: The base station can configure an associated CORESET pool index for each PUCCH (resource) group (e.g., via higher layer signaling (e.g., RRC signaling)). That is, the base station can group multiple PUCCH resources and configure the PUCCH group to the UE, and can configure multiple PUCCH groups to the UE. In this case, if a specific PUCCH resource belongs to a specific PUCCH group, the PUCCH resource can be associated with the CORESET pool index associated to the corresponding PUCCH group.

[0189] Alternative solution 3: The base station can configure, via higher layer signaling (eg, RRC signaling), whether to apply the first UL TCI state or the second UL TCI state indicated in a unified TCI indication manner for each PUCCH resource.

[0190] Here, it can be promised / configured / defined that PUCCH resources configured to apply the first UL TCI state are associated to CORESET pool 0, and PUCCH resources configured to apply the second UL TCI state are associated to CORESET pool 1.

[0191] Here, regarding the unified TCI indication method, for downlink scheduling, up to two UL TCI states can be indicated through the TCI field of the DCI. Here, the DCI of CORESET pool 0 (ie, DCI sent by a CORESET belonging to CORESET pool 0) indicates a first UL TCI state, and the DCI of pool 1 (ie, DCI sent by a CORESET belonging to CORESET pool 1) indicates a second TCI state.

[0192] That is, whether to apply the first TCI state and the second TCI state indicated by the unified TCI indication to each PUCCH resource can be configured through the base station configuration. In addition, for the unified TCI indication, the first TCI state and the second TCI state can be indicated by DL DCI. In addition, when PUSCH is scheduled using DCI format 0-0 in a specific TRP, the UE can send PUSCH by applying the UL TCI state (i.e., one of the first TCI state and the second TCI state) configured for a specific PUCCH resource (e.g., the lowest ID PUCCH resource) among the PUCCH resources associated with the CORESET pool to which the CORESET to which the DCI format 0-0 is sent belongs (i.e., QCL type-D RS based on the corresponding UL TCI state).

[0193] Embodiment 2: When DCI format 0-0 is received by a CORESET belonging to CORESET pool i (i is an integer greater than or equal to 0) and the corresponding DCI schedules PUSCH, the default beam of PUSCH can be determined as the spatial relationship RS set in the spatial relationship information of the i+1th smallest ID PUCCH resource among the PUCCH resources.

[0194] For example, if a PUSCH is scheduled by DCI format 0-0 received by a CORESET belonging to CORESET pool 0 / 1, the default beam of the PUSCH can be determined by the spatial relationship RS configured in the spatial relationship information of the 1st / 2nd smallest ID PUCCH resource.

[0195] At the same time, a method for determining an existing PUSCH default beam is described. When the Release 16 default spatial relationship is configured in the NR system, the UE performs the following operations. When there is at least one CORESET in the BWP in which the PUSCH is transmitted, the UE determines the QCL RS (e.g., QCL Type-D RS) configured in the TCI state of the minimum CORESET ID as the PUSCH default beam. On the other hand, when there is no CORESET in the BWP in which the PUSCH is transmitted, the UE determines the default beam as the QCL RS (e.g., QCL Type-D RS) configured in the TCI state corresponding to the lowest ID TCI code point among the TCI code points defined in the TCI field of the DCI that schedules the PDSCH.

[0196] Embodiment 3: By extending the existing default beam determination method, if there is at least one CORESET in the BWP that transmits the PUSCH, the UE checks the CORESET pool of the CORESET that has scheduled the PUSCH (or checks the CORESET pool associated to the PUSCH). Then, the UE is able to determine the QCLRS (e.g., QCL type-D RS) set in the TCI state of the lowest CORESET ID belonging to the CORESET pool as the PUSCH default beam.

[0197] On the other hand, if there is no CORESET in the BWP in which the PUSCH is transmitted, the CORESET pool of the CORESET that schedules the PUSCH is checked (or the CORESET pool associated to the PUSCH is checked). The UE is then able to determine the QCL RS (e.g., QCL type-D RS) configured as the TCI state corresponding to the lowest ID TCI code point among the TCI code points defined in the TCI field of the DCI that schedules the PDSCH belonging to the CORESET pool as the PUSCH default beam.

[0198] The operation of determining a default beam of at least one PUSCH for MTRP PUSCH transmission according to the present disclosure can be ultimately applied through a combination / combination of the above proposals.

[0199] The parameters in the above proposals, whether to apply the proposals, etc. can be indicated by the base station to the UE (for example, RRC signaling), reported by the UE to the base station, or configured as fixed values.

[0200] Figure 7 is a diagram illustrating a signaling procedure between a network and a UE for a PUSCH transmission and reception method according to an embodiment of the present disclosure.

[0201] Figure 7 The diagram shows signaling between a network (e.g., TRP 1, TRP 2) and a UE in a multi-TRP (i.e., M-TRP, or multi-cell, all TRPs hereinafter may be replaced by cells) scenario to which the method proposed in the present invention (e.g., embodiments 1 to 3, a combination of one or more of the methods proposed in embodiments 1 to 3) can be applied. Here, UE / network is just an example and may be replaced by various devices. Figure 7 It is only for the convenience of explanation and does not limit the scope of the present disclosure. In addition, it can be omitted depending on the situation and / or setting. Figure 7 Some of the steps are shown in the figure.

[0202] Figure 7The signaling scheme described in the specification can be extended and applied to signaling between multiple TRPs and multiple UEs. In the following description, the network can be a base station including multiple TRPs, and can be a cell including multiple TRPs. For example, an ideal / non-ideal backhaul can be established between TRP 1 and TRP 2 that constitute the network. In addition, although the following description is based on multiple TRPs, it can also be extended and applied to transmission through multiple panels. In addition, in the present disclosure, the operation of UE receiving a signal from TRP1 / TRP2 can also be interpreted / described as UE (via / using TRP1 / 2) receiving a signal from the network (or can be the operation of UE (via / using TRP1 / 2) receiving a signal from the network), and the operation of the terminal sending a signal to TRP1 / TRP2 can also be interpreted / described as UE (via / using TRP1 / TRP2) sending a signal to the network (or can be the operation of UE (via / using TRP1 / TRP2) sending a signal to the network), and vice versa.

[0203] A base station may be a general term for an object that performs data transmission and reception with a UE. For example, a base station may be a concept including one or more TPs (transmission points), one or more TRPs (transmission and reception points), and the like. In addition, a TP and / or a TRP may include a panel, a transmission and reception unit, and the like of a base station. In addition, "TRP" may be applied by replacing it with expressions such as a panel, an antenna array, a cell (e.g., a macro cell / small cell / micro cell, etc.), a TP (transmission point), a base station (gNB, etc.). As described above, a TRP may be distinguished according to information (e.g., an index, an ID) about a CORESET group (or a CORESET pool). For example, if a UE is configured to transmit and receive using multiple TRPs (or cells), this may mean configuring multiple CORESET groups (or CORESET pools) for the UE. Configuration of such a CORESET group (or CORESET pool) may be performed via higher layer signaling (e.g., RRC signaling, etc.).

[0204] The UE may receive configuration information from the network via / using TRP 1 (and / or TRP 2) (S701).

[0205] The configuration information may include information related to the configuration of the network (eg, TRP configuration) / information related to transmission / reception based on M-TRP (eg, resource allocation, etc.). Here, the configuration information may be sent via higher layer signaling (eg, RRC signaling, MAC-CE, etc.).

[0206] In addition, for example, the configuration information may include information for configuring a joint TCI and / or a separate DL / UL TCI. For example, the configuration information may include a TCI state list, which provides a reference signal for the QCL of a DMRS / downlink signal (e.g., CSI-RS) of a downlink channel (e.g., PDSCH, PDCCH), and / or provides a reference for determining an uplink transmission spatial filter of a DMRS / uplink signal (e.g., SRS) of an uplink channel (e.g., PUSCH, PUCCH).

[0207] In addition, for example, the configuration information may include configuration information for PUCCH transmission. The configuration information for PUCCH transmission may include information about one or more PUCCH resource sets configured for the UE, and may include a PUCCH resource identifier (ID) included for each PUCCH resource set. In addition, the configuration information for PUCCH transmission may include a TCI state (e.g., TCI-state) or a TCI uplink state (e.g., TCI-UL-state) for a spatial configuration for PUCCH transmission (i.e., for configuring an RS for determining an uplink transmission spatial filter (UL Tx spatial filter) for PUCCH resources), or may include PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo). As described above, in order to determine the UL Tx spatial filter for PUCCH transmission, the QCL type-D RS indicated in the TCI state (e.g., TCI-state) or the TCI uplink state (e.g., TCI-UL-state) in the configuration information may be configured / used, or the spatial relationship RS in the PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo) may be configured / used. In addition, the activated spatial relationship RS may be configured / used for each PUCCH resource ID through a PUCCH spatial relationship activation / deactivation MAC control element (CE), an enhanced PUCCH spatial relationship activation / deactivation MAC CE, or a PUCCH spatial relationship activation / deactivation MAC CE for multiple TRP PUCCHs.

[0208] In addition, for example, the configuration information may include configuration information of a time / frequency CORESET for configuring monitoring / searching for PDCCH (or DCI). One or more CORESETs may be configured for a UE, and configuration information for each CORESET may be provided to the UE. The configuration information for each CORESET may include a CORESET pool index (e.g., 0 or 1) for a CORESET pool to which the corresponding CORESET belongs.

[0209] In addition, the configuration information may include configuration information related to PUSCH transmission to multiple TRPs (e.g., STxMP transmission) described in the method proposed as described above (e.g., embodiments 1 to 3, a combination of one or more of the methods proposed in embodiments 1 to 3).

[0210] At the same time, despite Figure 7 Not shown, but the UE can receive a MAC CE for activating and / or deactivating the spatial relationship for PUCCH resources (e.g., PUCCH spatial relationship activation / deactivation MAC CE, enhanced PUCCH spatial relationship activation / deactivation MAC CE, PUCCH spatial relationship activation / deactivation MAC CE for multiple TRP PUCCHs) from the network through / using TRP 1 (and / or TRP 2).

[0211] The UE receives downlink control information (DCI) from the network through / using TRP 1 (and / or TRP 2) (S702). That is, the UE receives the first DCI in the first CORESET and receives the second DCI in the second CORESET.

[0212] Here, the first DCI and the second DCI may be transmitted through the PDCCH, respectively, and may schedule the first PDSCH and the second PDSCH (ie, including a DL grant), respectively.

[0213] In addition, the first CORESET and the second CORESET may have different CORESET pool indexes. For example, the UE may receive a first DCI for scheduling a first PUSCH for the corresponding TRP 1 from / through TRP 1 in the first CORESET (e.g., CORESET pool index 0), and the UE may receive a second DCI for scheduling a second PUSCH for the corresponding TRP 2 from / through TRP 2 in the second CORESET (e.g., CORESET pool index 1).

[0214] In addition, in this case, at least one format of the first DCI and the second DCI may be DCI format 0_0.

[0215] The UE sends a first PUSCH and a second PUSCH (S703). That is, based on different spatial relationship RSs, the UE may send a first PUSCH (eg, toward TRP 1) according to the scheduling of the first DCI, and may send a second PUSCH (eg, toward TRP 2) according to the scheduling of the second DCI.

[0216] As in the method proposed as described above, the RS used to determine the ULTx spatial domain filter for the first PUSCH and / or the second PUSCH transmission can be determined as a spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the CORESET in which the DCI scheduling the corresponding PUSCH is transmitted. For example, a first spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the first CORESET can be used for the first PUSCH transmission. And / or a second spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the second CORESET can be used for the second PUSCH transmission.

[0217] Here, when DCI 1 and / or DCI 2 is DCI format 0_0, the RS used to determine the UL Tx spatial domain filter for the first PUSCH and / or second PUSCH transmission can be determined as a spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the CORESET in which the DCI scheduling the corresponding PUSCH is sent.

[0218] In addition, as in the above-mentioned embodiment 1, the specific PUCCH resource may be determined as a PUCCH resource having a lowest ID among the PUCCH resources associated with the CORESET pool index.

[0219] Here, for example, a CORESET full index associated with each PUCCH resource (of the PUSCH resources configured for the UE) may be configured. In addition, for example, the PUCCH resources (configured for the UE) may be grouped, and a CORESET pool index associated with each PUCCH group may be configured. In addition, for example, a first TCI state (e.g., a first unified / joint TCI state) or a second TCI state (e.g., a second unified / joint TCI state) indicated for each PUCCH resource via downlink DCI may be configured, and a CORESET pool index associated with each TCI state may be configured. In this case, the QCL type-D RS in a specific TCI state (e.g., a unified / joint TCI state) indicated by the TCI field of the DL DCI (i.e., not the first DCI and the second DCI) may be interpreted as a spatial relation RS for each PUCCH resource. Therefore, the UE is able to use the spatial relation RS for a specific PUCCH resource (i.e., the QCL type-D RS in the TCI state configured for the corresponding PUCCH resource) as an RS for determining a UL Tx spatial domain filter for PUSCH transmission.

[0220] In addition, as in the above-mentioned embodiment 2, the specific PUCCH resource can be determined as a PUCCH resource having a CORESET pool index + an Xth ID (where X is a natural number, for example, 1) among the PUCCH resources (configured to the UE).

[0221] Figure 8 is a diagram illustrating operations of a UE for a PUSCH transmission and reception method according to an embodiment of the present disclosure.

[0222] refer to Figure 8 , Figure 8 The diagram illustrates the operation of the UE based on a previously proposed method (eg, embodiments 1 to 3, a combination of one or more of the methods proposed in embodiments 1 to 3). Figure 8 The examples are for convenience of explanation and do not limit the scope of the present disclosure. Figure 8 Some of the steps illustrated in the figure may be omitted depending on the situation and / or setting. Figure 8 The UE in is just an example and can be implemented as follows Fig.10 For example, Fig.10 The processor (102 / 202) can control to send and receive channels / signals / data / information, etc. using the transceiver (106 / 206), and can also control to store the sent or received channels / signals / data / information, etc. in the memory (104 / 204).

[0223] in addition, Figure 8 The operation can be done by Fig.10 One or more processors (102, 202) of the processor, and Figure 8 The operation can be used to drive Fig.10 The command / program (eg, instructions, executable code) of at least one processor (eg, 102, 202) is stored in a memory (eg, Fig.10 in one or more memories (104, 204)).

[0224] The UE may receive configuration information from a base station (via / using TRP 1 (and / or TRP 2)) (S801).

[0225] The configuration information may include configuration information related to uplink PUSCH transmissions (e.g., STxMP transmissions) to multiple TRPs described in the methods proposed above (e.g., embodiments 1 to 3, a combination of one or more of the methods proposed in embodiments 1 to 3).

[0226] In addition, the configuration information may include information for configuring joint TCI and / or separate DL / UL TCI. For example, the configuration information may include a list of TCI states, which provides a reference signal for the QCL of the DMRS / downlink signal (e.g., CSI-RS) of the downlink channel (e.g., PDSCH, PDCCH), and / or provides a reference for determining the uplink transmission spatial filter of the DMRS / uplink signal (e.g., SRS) of the uplink channel (e.g., PUSCH, PUCCH).

[0227] In addition, for example, the configuration information may include configuration information for PUCCH transmission. The configuration information for PUCCH transmission may include information about one or more PUCCH resource sets configured for the UE, and may include a PUCCH resource identifier (ID) included for each PUCCH resource set. In addition, the configuration information for PUCCH transmission may include a TCI state (e.g., TCI-state) or a TCI uplink state (e.g., TCI-UL-state) for spatial configuration of PUCCH transmission (i.e., for configuring an RS for determining an uplink transmission spatial filter (UL Tx spatial filter) for PUCCH resources), or may include PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo). As described above, in order to determine the UL Tx spatial filter for PUCCH transmission, a QCL type-D RS indicated in a TCI state (e.g., TCI-state) or a TCI uplink state (e.g., TCI-UL-state) in the configuration information may be configured / used, or a spatial relationship RS in the PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo) may be configured / used. In addition, an activated spatial relation RS may be configured / used for each PUCCH resource ID through a PUCCH spatial relation activation / deactivation MAC control element (CE), an enhanced PUCCH spatial relation activation / deactivation MAC CE, or a PUCCH spatial relation activation / deactivation MAC CE for multiple TRP PUCCHs.

[0228] In addition, for example, the configuration information may include configuration information of a time / frequency CORESET for configuring monitoring / searching for PDCCH (or DCI). One or more CORESETs may be configured for a UE, and configuration information for each CORESET may be provided to the UE. The configuration information for each CORESET may include a CORESET pool index (e.g., 0 or 1) for a CORESET pool to which the corresponding CORESET belongs.

[0229] At the same time, although Figure 8Not shown, but the UE can receive a MAC CE for activating and / or deactivating the spatial relationship for PUCCH resources (e.g., PUCCH spatial relationship activation / deactivation MAC CE, enhanced PUCCH spatial relationship activation / deactivation MAC CE, PUCCH spatial relationship activation / deactivation MAC CE for multiple TRP PUCCHs) from the base station through / using TRP 1 (and / or TRP 2).

[0230] The UE receives a first DCI in a first CORESET and receives a second DCI in a second CORESET from a base station (via / using TRP 1 and TRP 2) (S802).

[0231] Here, the first DCI and the second DCI may be transmitted via the PDCCH, respectively, and may schedule the first PDSCH and the second PDSCH (ie, including a DL grant), respectively.

[0232] In addition, the first CORESET and the second CORESET may have different CORESET pool indexes. For example, the UE may receive a first DCI for scheduling a first PUSCH for the corresponding TRP 1 from / through TRP 1 in the first CORESET (e.g., CORESET pool index 0), and the UE may receive a second DCI for scheduling a second PUSCH for the corresponding TRP 2 from / through TRP 2 in the second CORESET (e.g., CORESET pool index 1).

[0233] In addition, in this case, at least one format of the first DCI and the second DCI may be DCI format 0_0.

[0234] The UE transmits a first PUSCH and a second PUSCH to the base station (via / using TRP 1 and TRP 2) (S803).

[0235] That is, based on different spatial relationship RSs, the UE may send a first PUSCH according to the scheduling of the first DCI (eg, toward TRP 1), and may send a second PUSCH according to the scheduling of the second DCI (eg, toward TRP 2).

[0236] As described above, the RS used to determine the UL Tx spatial domain filter for the first PUSCH and / or the second PUSCH transmission can be determined as a spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the CORESET in which the DCI scheduling the corresponding PUSCH is transmitted. For example, a first spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the first CORESET can be used for the first PUSCH transmission. And / or a second spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the second CORESET can be used for the second PUSCH transmission.

[0237] Here, when DCI 1 and / or DCI 2 is DCI format 0_0, the RS used to determine the UL Tx spatial domain filter for the first PUSCH and / or second PUSCH transmission can be determined as a spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the CORESET in which the DCI scheduling the corresponding PUSCH is sent.

[0238] In addition, as in the above-mentioned embodiment 1, the specific PUCCH resource may be determined as the PUCCH resource with the lowest ID among the PUCCH resources associated with the CORESET pool index.

[0239] Here, for example, a CORESET full index associated with each PUCCH resource (in the PUSCH resources configured for the UE) may be configured. In addition, for example, the PUCCH resources (configured for the UE) may be grouped, and a CORESET pool index associated with each PUCCH group may be configured. In addition, for example, a first TCI state (e.g., a first unified / joint TCI state) or a second TCI state (e.g., a second unified / joint TCI state) indicated for each PUCCH resource via downlink DCI may be configured, and a CORESET pool index associated with each TCI state may be configured. In this case, the QCL type-D RS in a specific TCI state (e.g., a unified / joint TCI state) indicated by the TCI field of the DLDCI (i.e., not the first DCI and the second DCI) may be interpreted as a spatial relation RS for each PUCCH resource. Therefore, the UE is able to use the spatial relation RS for a specific PUCCH resource (i.e., the QCL type-D RS in the TCI state configured for the corresponding PUCCH resource) as an RS for determining a UL Tx spatial domain filter for PUSCH transmission.

[0240] In addition, as in the above-mentioned embodiment 2, the specific PUCCH resource can be determined as a PUCCH resource having a CORESET pool index+Xth ID (where X is a natural number, for example, 1) among PUCCH resources (configured to the UE).

[0241] Fig. 9 is a diagram illustrating an operation of a base station for a PUSCH transmission and reception method according to an embodiment of the present disclosure.

[0242] refer to Fig. 9 , Fig. 9 The diagram illustrates the operation of a base station based on a previously proposed method (eg, embodiments 1 to 3, or a combination of one or more of the methods proposed in embodiments 1 to 3). Fig. 9 The examples are for convenience of explanation and do not limit the scope of the present disclosure. Fig. 9 In addition, Fig. 9 The base station in is only an example and can be implemented as follows Fig.10 For example, Fig.10 The processor (102 / 202) can control to send and receive channels / signals / data / information, etc. using the transceiver (106 / 206), and can also control to store the sent or received channels / signals / data / information, etc. in the memory (104 / 204).

[0243] in addition, Fig. 9 The operation can be done by Fig.10 One or more processors (102, 202) of the processor, and Fig. 9 The operation can be used to drive Fig.10 The command / program (eg, instructions, executable code) of at least one processor (eg, 102, 202) is stored in a memory (eg, Fig.10 in one or more memories (104, 204).

[0244] The base station sends configuration information to the UE (via / using TRP 1 (and / or TRP 2)) (S901).

[0245] The configuration information may include configuration information related to uplink PUSCH transmissions (e.g., STxMP transmissions) to multiple TRPs described in the above-mentioned methods (e.g., embodiments 1 to 3, a combination of one or more of the methods proposed in embodiments 1 to 3).

[0246] In addition, the configuration information may include information for configuring joint TCI and / or separate DL / UL TCI. For example, the configuration information may include a list of TCI states, which provides a reference signal for QCL of DMRS / downlink signals (e.g., CSI-RS) for downlink channels (e.g., PDSCH, PDCCH), and / or provides a reference for uplink transmission spatial filters for determining DMRS / uplink signals (e.g., SRS) for uplink channels (e.g., PUSCH, PUCCH).

[0247] In addition, for example, the configuration information may include configuration information for PUCCH transmission. The configuration information for PUCCH transmission may include information about one or more PUCCH resource sets configured for the UE, and may include a PUCCH resource identifier (ID) included for each PUCCH resource set. In addition, the configuration information for PUCCH transmission may include a TCI state (e.g., TCI-state) or a TCI uplink state (e.g., TCI-UL-state) for a spatial configuration for PUCCH transmission (i.e., for configuring an RS for determining an uplink transmission spatial filter (UL Tx spatial filter) for PUCCH resources), or may include PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo). As described above, in order to determine the UL Tx spatial filter for PUCCH transmission, the QCL type-D RS indicated in the TCI state (e.g., TCI-state) or the TCI uplink state (e.g., TCI-UL-state) in the configuration information may be configured / used, or the spatial relationship RS in the PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo) may be configured / used. In addition, the activated spatial relationship RS may be configured / used for each PUCCH resource ID through a PUCCH spatial relationship activation / deactivation MAC control element (CE), an enhanced PUCCH spatial relationship activation / deactivation MAC CE, or a PUCCH spatial relationship activation / deactivation MAC CE for multiple TRP PUCCHs.

[0248] In addition, for example, the configuration information may include configuration information of a time / frequency CORESET for configuring monitoring / searching for PDCCH (or DCI). One or more CORESETs may be configured for a UE, and configuration information for each CORESET may be provided to the UE. The configuration information for each CORESET may include a CORESET pool index (e.g., 0 or 1) for a CORESET pool to which the corresponding CORESET belongs.

[0249] At the same time, although Fig. 9Not shown, the base station can send a MAC CE for activating and / or deactivating spatial relationship for PUCCH resources (e.g., PUCCH spatial relationship activation / deactivation MAC CE, enhanced PUCCH spatial relationship activation / deactivation MAC CE, PUCCH spatial relationship activation / deactivation MAC CE for multiple TRP PUCCHs) to the UE through / using TRP 1 (and / or TRP 2).

[0250] The base station sends a first DCI in a first CORESET and sends a second DCI in a second CORESET to the UE (via / using TRP 1 and TRP 2) (S902).

[0251] Here, the first DCI and the second DCI may be transmitted via the PDCCH, respectively, and may schedule the first PDSCH and the second PDSCH (ie, including DL grants), respectively.

[0252] In addition, the first CORESET and the second CORESET may have different CORESET pool indexes. For example, the base station may send a first DCI for scheduling a first PUSCH for the corresponding TRP 1 from / through TRP 1 in the first CORESET (e.g., CORESET pool index 0), and the base station may send a second DCI for scheduling a second PUSCH for the corresponding TRP 2 from / through TRP2 in the second CORESET (e.g., CORESET pool index 1).

[0253] In addition, in this case, at least one format of the first DCI and the second DCI may be DCI format 0_0.

[0254] The base station receives the first PUSCH and the second PUSCH from the UE (via / using TRP 1 and TRP 2) (S903).

[0255] That is, based on different spatial relationship RSs, the base station may receive a first PUSCH according to scheduling of a first DCI (eg, toward TRP1), and may send a second PUSCH according to scheduling of a second DCI (eg, toward TRP 2).

[0256] As in the method proposed above, the RS used to determine the UL Tx spatial domain filter for the first PUSCH and / or the second PUSCH transmission can be determined as a spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the DCI-scheduled CORESET in which the corresponding PUSCH is transmitted. For example, a first spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the first CORESET can be used for the first PUSCH transmission. And / or a second spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the second CORESET can be used for the second PUSCH transmission.

[0257] Here, when DCI 1 and / or DCI 2 is DCI format 0_0, the RS used to determine the UL Tx spatial domain filter for the first PUSCH and / or second PUSCH transmission can be determined as a spatial relationship RS for a specific PUCCH resource associated with the CORESET pool index of the CORESET in which the DCI scheduling the corresponding PUSCH is sent.

[0258] In addition, as in the above-mentioned embodiment 1, the specific PUCCH resource may be determined as a PUCCH resource with the lowest ID among the PUCCH resources associated with the CORESET pool index.

[0259] Here, for example, a CORESET full index associated with each PUCCH resource (in the PUSCH resources configured for the UE) may be configured. In addition, for example, the PUCCH resources (configured for the UE) may be grouped, and a CORESET pool index associated with each PUCCH group may be configured. In addition, for example, a first TCI state (e.g., a first unified / joint TCI state) or a second TCI state (e.g., a second unified / joint TCI state) indicated for each PUCCH resource via downlink DCI may be configured, and a CORESET pool index associated with each TCI state may be configured. In this case, the QCL type-D RS in a specific TCI state (e.g., a unified / joint TCI state) indicated by the TCI field of the DLDCI (i.e., not the first DCI and the second DCI) may be interpreted as a spatial relation RS for each PUCCH resource. Therefore, the UE may use the spatial relation RS for a specific PUCCH resource (i.e., the QCL type-D RS in the TCI state configured for the corresponding PUCCH resource) as an RS for determining the UL Tx spatial domain filter for PUSCH transmission.

[0260] In addition, as in the above-mentioned embodiment 2, the specific PUCCH resource can be determined as a PUCCH resource having a CORESET pool index+Xth ID (where X is a natural number, for example, 1) among PUCCH resources (configured for the UE).

[0261] General equipment to which the present disclosure can be applied

[0262] Fig.10 is a diagram illustrating a block diagram of a wireless communication device according to an embodiment of the present disclosure.

[0263] refer to Fig.10 , the first wireless device 100 and the second wireless device 200 can send and receive wireless signals through a variety of radio access technologies (e.g., LTE, NR).

[0264] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the description, function, process, proposal, method and / or operation flowchart disclosed in the present disclosure. For example, the processor 102 may send a wireless signal including the first information / signal through the transceiver 106 after generating the first information / signal by processing the information in the memory 104. In addition, the processor 102 may receive a wireless signal including the second information / signal through the transceiver 106, and then store the information obtained by signal processing of the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including commands for executing all or part of the process controlled by the processor 102 or for executing the description, function, process, proposal, method and / or operation flowchart disclosed in the present disclosure. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver 106 may be connected to the processor 102 and may send and / or receive wireless signals through one or more antennas 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used in conjunction with an RF (radio frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0265] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the description, function, process, proposal, method and / or operation flowchart disclosed in the present disclosure. For example, the processor 202 may generate third information / signal by processing the information in the memory 204, and then transmit the wireless signal including the third information / signal through the transceiver 206. In addition, the processor 202 may receive a wireless signal including fourth information / signal through the transceiver 206, and then store the information obtained by signal processing of the fourth information / signal in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including commands for executing all or part of the process controlled by the processor 202 or for executing the description, function, process, proposal, method and / or operation flowchart disclosed in the present disclosure. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver 206 may be connected to the processor 202 and may send and / or receive wireless signals through one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used in conjunction with an RF unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0266] In the following, the hardware elements of the wireless device 100, 200 will be described in more detail. It is not limited thereto, and one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102, 202 may generate one or more PDUs (protocol data units) and / or one or more SDUs (service data units) according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts included in the present disclosure. One or more processors 102, 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in the present disclosure. One or more processors 102, 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, processes, proposals, and / or methods disclosed in the present disclosure to provide them to one or more transceivers 106, 206. The one or more processors 102, 202 may receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in the present disclosure.

[0267] One or more processors 102, 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof. In an example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) may be included in one or more processors 102, 202. The description, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present disclosure may be implemented by using firmware or software and the firmware or software may be implemented to include modules, processes, functions, etc. Firmware or software configured to execute the description, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present disclosure may be included in one or more processors 102, 202 or may be stored in one or more memories 104, 204 and driven by one or more processors 102, 202. The description, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present disclosure may be implemented by firmware or software in the form of codes, commands, and / or command sets.

[0268] One or more memories 104, 204 may be connected to one or more processors 102, 202 and may store data, signals, messages, information, programs, codes, instructions, and / or commands in various forms. One or more memories 104, 204 may be configured with ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104, 204 may be located inside and / or outside one or more processors 102, 202. In addition, one or more memories 104, 204 may be connected to one or more processors 102, 202 via a variety of technologies such as wired or wireless connections.

[0269] One or more transceivers 106, 206 may send user data, control information, wireless signals / channels, etc. mentioned in the methods and / or operation flow charts, etc. of the present disclosure to one or more other devices. One or more transceivers 106, 206 may receive user data, control information, wireless signals / channels, etc. mentioned in the description, function, process, proposal, method and / or operation flow chart, etc. disclosed in the present disclosure from one or more other devices. For example, one or more transceivers 106, 206 may be connected to one or more processors 102, 202 and may send and receive wireless signals. For example, one or more processors 102, 202 may control one or more transceivers 106, 206 to send user data, control information or wireless signals to one or more other devices. In addition, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information or wireless signals from one or more other devices. In addition, one or more transceivers 106, 206 may be connected to one or more antennas 108, 208, and one or more transceivers 106, 206 may be configured to send and receive user data, control information, wireless signals / channels, etc. mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in the present disclosure through one or more antennas 108, 208. In the present invention, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may convert received wireless signals / channels, etc. from RF band signals to baseband signals by using one or more processors 102, 202 to process received user data, control information, wireless signals / channels, etc. One or more transceivers 106, 206 may convert user data, control information, wireless signals / channels, etc. processed by using one or more processors 102, 202 from baseband signals to RF band signals. Therefore, one or more transceivers 106, 206 may include (analog) oscillators and / or filters.

[0270] The above-mentioned embodiments are elements and features of the present disclosure combined in a predetermined form. Unless otherwise explicitly mentioned, each element or feature should be considered optional. Each element or feature can be implemented in a form that is not combined with other elements or features. In addition, the embodiments of the present disclosure may include combined partial elements and / or features. The order of the operations described in the embodiments of the present disclosure may be changed. Some elements or features of an embodiment may be included in other embodiments, or may be replaced by corresponding elements or features of other embodiments. It is clear that an embodiment may include a combined claim without an explicit dependency in the claim, or may be included as a new claim by modification after application.

[0271] It is clear to those skilled in the art that the present disclosure can be implemented in other specific forms within the scope of the essential features of the present disclosure. Therefore, the above detailed description should not be interpreted restrictively in every aspect, but should be considered as illustrative. The scope of the present invention should be determined by the reasonable interpretation of the attached claims, and all changes within the equivalent scope of the present disclosure are included in the scope of the present invention.

[0272] The scope of the present disclosure includes software or machine executable commands (e.g., operating systems, applications, firmware, programs, etc.) that perform operations in a device or computer according to the methods of various embodiments, and non-transitory computer-readable media that store such software or commands, etc. and can be executed in a device or computer. Commands that can be used to program a processing system that performs the features described in the present disclosure can be stored in a storage medium or a computer-readable storage medium, and the features described in the present disclosure can be implemented by using a computer program product that includes such a storage medium. The storage medium may include a high-speed random access memory, such as DRAM, SRAM, DDR RAM, or other random access solid-state storage devices, but is not limited thereto, and it may include non-volatile memory, such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory optionally includes one or more storage devices located away from the processor. The memory or alternatively, the non-volatile memory device in the memory includes a non-transitory computer-readable storage medium. The features described in this disclosure may be stored in any machine-readable medium to control the hardware of a processing system, and may be integrated into software and / or firmware that allows the processing system to interact with other mechanisms using the results from embodiments of the present disclosure. Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments / containers.

[0273] Here, the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure may include narrowband Internet of Things for low-power communication, as well as LTE, NR and 6G. Here, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, which may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. In addition or alternatively, the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure may perform communication based on LTE-M technology. Here, in the example, LTE-M technology may be an example of LPWAN technology and may be referred to as various names such as eMTC (enhanced machine type communication). For example, LTE-M technology may be implemented in at least any one of the various standards including 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M, etc., and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100, 200 of the present disclosure may include at least any one of ZigBee, Bluetooth, and a low power wide area network (LPWAN) considering low power communication, and it is not limited to the above names. In an example, the ZigBee technology may generate a PAN (Personal Area Network) related to small / low power digital communication based on various standards such as IEEE 802.15.4, etc., and may be referred to by various names.

[0274] Industrial availability

[0275] The method proposed in the present invention is mainly described by taking the application in 3GPP LTE / LTE-A and 5G systems as an example, but can also be applied to various wireless communication systems other than 3GPP LTE / LTE-A and 5G systems.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are received in a first control resource set (CORESET) and a second CORESET having different CORESET pool indexes, respectively; and performing the first PUSCH transmission and the second PUSCH transmission based on different spatially related reference signals (RSs), Among them, a first spatial relationship RS for a specific PUCCH resource associated with a CORESET pool index of the first CORESET is used for the first PUSCH transmission.

2. The method according to claim 1, wherein: The specific PUCCH resource is determined to be a PUCCH resource having a lowest identifier (ID) among PUCCH resources associated with the CORESET pool index.

3. The method according to claim 1, wherein: An associated CORESET pool index is configured for each PUCCH resource.

4. The method according to claim 2, wherein: PUCCH resources are grouped, and an associated CORESET full index is set for each PUCCH group.

5. The method according to claim 2, wherein: Configure whether to apply one of a first transmission configuration indication (TCI) state and a second TCI state indicated by a downlink DCI to each PUCCH resource, and Among them, an associated CORESET pool index is configured for each TCI state.

6. The method according to claim 1, wherein: The specific PUCCH resource is determined as a PUCCH resource having the CORESET pool index+Xth (X is a natural number) identifier (ID) among the PUCCH resources.

7. The method according to claim 1, wherein: The format of the first DCI is DCI format 0_0.

8. A user equipment (UE) operating in a wireless communication system, the UE comprising: at least one transceiver, the at least one transceiver configured to send and receive wireless signals; as well as at least one processor configured to control the at least one transceiver, Wherein, the at least one processor is configured to: receiving a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are received in a first control resource set (CORESET) and a second CORESET having different CORESET pool indexes, respectively; and performing the first PUSCH transmission and the second PUSCH transmission based on different spatially related reference signals (RSs), Among them, a first spatial relationship RS for a specific PUCCH resource associated with a CORESET pool index of the first CORESET is used for the first PUSCH transmission.

9. At least one non-transitory computer-readable medium storing at least one instruction, wherein: The at least one instruction executable by at least one processor controls a user equipment (UE) to: receiving a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are received in a first control resource set (CORESET) and a second CORESET having different CORESET pool indexes, respectively; and performing the first PUSCH transmission and the second PUSCH transmission based on different spatially related reference signals (RSs), Among them, a first spatial relationship RS for a specific PUCCH resource associated with a CORESET pool index of the first CORESET is used for the first PUSCH transmission.

10. A processing device, the processing device being configured to control a user equipment (UE) in a wireless communication system, the processing device comprising: at least one processor; as well as At least one computer memory operably connected to the at least one processor and storing instructions that upon execution by the at least one processor perform operations comprising: receiving a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are received in a first control resource set (CORESET) and a second CORESET having different CORESET pool indexes, respectively; and performing the first PUSCH transmission and the second PUSCH transmission based on different spatially related reference signals (RSs), Among them, a first spatial relationship RS for a specific PUCCH resource associated with a CORESET pool index of the first CORESET is used for the first PUSCH transmission.

11. A method performed by a base station in a wireless communication system, the method comprising: transmitting a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are transmitted in a first control resource set (CORESET) and a second CORESET having different CORESET pool indexes, respectively; and receiving the first PUSCH transmission and the second PUSCH transmission based on different spatially related reference signals (RS), Among them, a first spatial relationship RS for a specific PUCCH resource associated with a CORESET pool index of the first CORESET is used for the first PUSCH transmission.

12. A base station operating in a wireless communication system, the base station comprising: at least one transceiver, the at least one transceiver configured to send and receive wireless signals; as well as at least one processor configured to control the at least one transceiver, Wherein, the at least one processor is configured to: transmitting a first downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) transmission and a second DCI for scheduling a second PUSCH transmission, wherein the first DCI and the second DCI are transmitted in a first control resource set (CORESET) and a second CORESET having different CORESET pool indexes, respectively; and receiving the first PUSCH transmission and the second PUSCH transmission based on different spatially related reference signals (RS), Among them, a first spatial relationship RS for a specific PUCCH resource associated with a CORESET pool index of the first CORESET is used for the first PUSCH transmission.

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