Method and apparatus for performing uplink transmission and reception in a wireless communication system

Abstract

A method and an apparatus for performing uplink transmission and reception in a wireless communication system are disclosed. According to an embodiment of the present disclosure, a method for performing uplink transmission in a wireless communication system includes: receiving first configuration information related to multiple spatial parameter-based simultaneous uplink transmission from a base station; receiving DCI format 0_0 for scheduling a PUSCH from the base station; and transmitting the PUSCH to the base station based on i) a single spatial parameter among the multiple spatial parameters or ii) the multiple spatial parameters, where at least one port of the PUSCH may correspond to the multiple spatial parameters.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for performing uplink transmission and reception in a wireless communication system.

Background Art

[0002] Mobile communication systems were developed to provide voice services while ensuring user mobility. However, mobile communication systems have expanded beyond voice to include data services, and currently, due to the explosive increase in traffic, there is a shortage of resources, and users are also demanding faster services. Therefore, a more advanced mobile communication system is desired.

[0003] The requirements for next-generation mobile communication systems are, broadly speaking, the acceptance of explosive data traffic, a revolutionary increase in the transmission rate per user, the acceptance of a significantly increased number of connected devices, very low end-to-end latency, and support for high energy efficiency. To this end, various technologies such as dual connectivity, massive multiple input multiple output (Massive MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, and device networking are being studied.

Summary of the Invention

Problems to be Solved by the Invention

[0004] A technical problem of the present disclosure is to provide a method and apparatus for performing uplink transmission and reception in a wireless communication system.

[0005] Another technical problem of the present disclosure is to provide a method and an apparatus for transmitting and receiving a physical uplink shared channel (PUSCH) scheduled by a DCI format 0_0 when a simultaneous transmission across multiple panels (STxMP) scheme is set.

[0006] Another technical problem of the present disclosure is to provide a method and an apparatus for transmitting and receiving a PUSCH based on a single panel or a single frequency network (SFN) STxMP.

[0007] The technical problems to be achieved by the present disclosure are not limited to the technical problems mentioned above. Other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present disclosure pertains from the following description.

Means for Solving the Problems

[0008] A method for a terminal to perform uplink transmission in a wireless communication system according to an embodiment of the present disclosure includes receiving, from a base station, first configuration information related to multi-spatial parameter-based simultaneous uplink transmission; receiving, from the base station, downlink control information (DCI) format 0_0 for scheduling a physical uplink shared channel (PUSCH); and transmitting the PUSCH to the base station based on i) a single spatial parameter among the multi-spatial parameters or ii) the multi-spatial parameters, wherein at least one port of the PUSCH may correspond to the multi-spatial parameters.

[0009] As another example of the present disclosure, a method for a base station to perform uplink reception in a wireless communication system includes transmitting first configuration information related to multi-spatial parameter-based simultaneous uplink transmission to a terminal, transmitting downlink control information (DCI) format 0_0 for scheduling a physical uplink shared channel (PUSCH) to the terminal, and receiving from the terminal i) a single spatial parameter among the multi-spatial parameters or ii) the PUSCH based on the multi-spatial parameters, and at least one port of the PUSCH may correspond to the multi-spatial parameters.

Effects of the Invention

[0010] According to an embodiment of the present disclosure, a method and an apparatus for performing uplink transmission and reception in a wireless communication system can be provided.

[0011] Also, according to an embodiment of the present disclosure, a method and an apparatus for transmitting and receiving a PUSCH scheduled by DCI format 0_0 when an STxMP scheme is configured can be provided.

[0012] Also, according to an embodiment of the present disclosure, a method and an apparatus for transmitting and receiving a PUSCH based on a single panel or a single frequency network (SFN) STxMP can be provided.

[0013] Also, according to an embodiment of the present disclosure, when a plurality of transmission configuration indicator (TCI) states / spatial relation information is applied to a PUSCH, DCI format 0_0 can perform reliability enhancement or single panel-based transmission (e.g., fallback operation).

[0014] The effects obtained from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those with ordinary knowledge in the technical field to which the present disclosure pertains from the following description.

Brief Description of the Drawings

[0015] The accompanying drawings, included as a part of the detailed description to assist in understanding the present disclosure, provide examples of embodiments related to the present disclosure and explain the technical features of the present disclosure together with the detailed description.

[0016]

Figure 1

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Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0017] Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description disclosed below together with the accompanying drawings is for explaining exemplary embodiments of the present disclosure and is not for showing the only embodiments in which the present disclosure can be implemented. The following detailed description includes specific details in order to provide a complete understanding of the present disclosure. However, it is understood by those skilled in the art that the present disclosure can be implemented without such specific details.

[0018] In some cases, to avoid obscuring the concept of the present disclosure, well-known structures and devices may be omitted, or they may be shown in the form of a block diagram centered on the core functions of each structure and device.

[0019] In the present disclosure, when a certain component is "connected", "coupled" or "connected" to another component, this may include not only a direct connection relationship but also an indirect connection relationship in which there are additional other components between them. Also, in the present disclosure, the terms "include" or "have" identify the existence of the recited features, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, steps, operations, elements, components and / or groups thereof.

[0020] In the present disclosure, terms such as "first", "second", etc. are used only for the purpose of distinguishing one component from another and are not used to limit the components. Unless otherwise specified, they do not limit the order or importance, etc. between the components. Therefore, within the scope of the present disclosure, the first component in one embodiment can also be referred to as the second component in another embodiment, and similarly, the second component in one embodiment can be referred to as the first component in another embodiment.

[0021] The terms used in this disclosure are for the purpose of describing particular embodiments and are not intended to limit the scope of the claims. As used in the description of the embodiments and the appended claims, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. The term "and / or" as used in this disclosure may refer to one of the related listed items or may include any and all possible combinations of two or more of them. Also, in this disclosure, " / " between words has the same meaning as "and / or" unless otherwise specified.

[0022] This disclosure is described with respect to a wireless communication network or a wireless communication system, and the operations performed in the wireless communication network may be performed in the process where a device (e.g., a base station) that governs the wireless communication network controls the network and transmits or receives signals, or may be performed in the process where a terminal connected to the wireless network transmits or receives signals to / from the network or between terminals.

[0023] In this disclosure, transmitting or receiving a channel includes the meaning of transmitting or receiving information or a signal on the channel. For example, transmitting a control channel means transmitting control information or a signal on the control channel. Similarly, transmitting a data channel means transmitting data information or a signal on the data channel.

[0024] In the following, the downlink (DL) means communication from the base station to the terminal, and the uplink (UL) means communication from the terminal to the base station. In the downlink, the transmitter may be part of the base station and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal and the receiver may be part of the base station. The base station may be represented as the first communication device, and the terminal may be represented as the second communication device. The base station (BS: Base Station) may be replaced by terms such as fixed station, Node B, eNB (evolved-NodeB), gNB (Next Generation NodeB), BTS (base transceiver system), access point (AP: Access Point), network (5G network), AI (Artificial Intelligence) system / module, RSU (road side unit), robot, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc. Also, the terminal (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 (road side unit), robot, AI (Artificial Intelligence) module, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.

[0025] The following techniques may be used in various wireless connection systems such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA may be implemented by wireless technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA may be implemented by wireless 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 wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (registered trademark) (3rd Generation Partnership Project) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0026] For the sake of clarity, the description will be based on the 3GPP communication system (e.g., LTE-A, NR), but the technical concept of the present disclosure is not limited thereto. LTE means the technology after 3GPP TS (Technical Specification) 36.xxx Release 8. Specifically, the LTE technology after 3GPP TS 36.xxx Release 10 is called LTE-A, and the LTE technology after 3GPP TS 36.xxx Release 13 is called LTE-A pro. 3GPP NR means the technology after TS 38.xxx Release 15. LTE / NR may be called the 3GPP system. "xxx" means the detailed number of the standard document. LTE / NR may be called the 3GPP system. Regarding the background technology, terms, abbreviations, etc. used in the description of the present disclosure, reference can be made to the matters described in the standard documents published before the present disclosure. For example, the following documents can be referred to.

[0027] In 3GPP LTE, reference can 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 (General Description), TS 36.331 (Radio Resource Control).

[0028] In 3GPP NR, reference can be made 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 (General Description of NR and NG-RAN (New Generation - Radio Access Network)), TS 38.331 (Radio Resource Control Protocol Specification).

[0029] The abbreviations of the terms that can be used in the present disclosure are defined as follows.

[0030] - BM: Beam Management

[0031] - CQI: Channel Quality Indicator

[0032] - CRI: Channel State Information - Reference Signal Resource Indicator

[0033] - CSI: Channel State Information

[0034] - CSI-IM: Channel State Information - Interference Measurement

[0035] - CSI-RS: Channel State Information - Reference Signal

[0036] - DMRS: Demodulation Reference Signal

[0037] - FDM: Frequency Division Multiplexing

[0038] - FFT: Fast Fourier Transform

[0039] - IFDMA: Interleaved Frequency Division Multiple Access

[0040] - IFFT: Inverse Fast Fourier Transform

[0041] - L1-RSRP: Layer 1 reference signal received power

[0042] - L1-RSRQ: Layer 1 reference signal received quality

[0043] - MAC: medium access control

[0044] - NZP: non-zero power

[0045] - OFDM: orthogonal frequency division multiplexing

[0046] - PDCCH: physical downlink control channel

[0047] - PDSCH: physical downlink shared channel

[0048] - PMI: precoding matrix indicator

[0049] - RE: resource element

[0050] - RI: Rank indicator

[0051] - RRC: radio resource control

[0052] - RSSI: received signal strength indicator

[0053] - Rx: Reception

[0054] - QCL: Quasi co-location

[0055] - SINR: Signal to interference and noise ratio

[0056] - SSB (or, SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS) and physical broadcast channel (PBCH))

[0057] - TDM: Time division multiplexing

[0058] - TRP: Transmission and reception point

[0059] - TRS: Tracking reference signal

[0060] - Tx: Transmission

[0061] - UE: User equipment

[0062] - ZP: Zero power

[0063] System Overview

[0064] As more communication devices require greater communication capacity, there is a growing need for mobile broadband communication that is improved compared to existing radio access technologies (RATs). In addition, massive Machine Type Communications (MTC), which connects a large number of devices and things to provide various services anytime and anywhere, is also one of the major issues considered in next-generation communications. In addition to this, the design of communication systems considering services / terminals sensitive to reliability and latency is also being discussed. Thus, the introduction of next-generation RATs considering enhanced mobile broadband communication (eMBB), massive MTC (mMTC), Ultra-Reliable and Low Latency Communication (URLLC), etc. is being discussed, and in this disclosure, for convenience, this technology is referred to as NR. NR is an expression representing an example of 5G RAT.

[0065] The new RAT system including NR uses an OFDM transmission scheme or a transmission scheme similar thereto. The new RAT system may follow OFDM parameters different from those of LTE's OFDM parameters. Or, the new RAT system may directly follow the numerology of existing LTE / LTE-A, but can support a larger system bandwidth (for example, 100 MHz). Or, one cell can also support multiple numerologies. That is, terminals operating with different numerologies may coexist within one cell.

[0066] Numerology corresponds to one subcarrier spacing in the frequency domain. By scaling the reference subcarrier spacing by an integer N, different numerologies can be defined.

[0067] FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure is applicable.

[0068] Referring to FIG. 1, the NG-RAN is composed of gNBs that provide 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 control plane (RRC) protocol termination for the UE. The gNBs are interconnected via the Xn interface. The gNBs are also connected to the NGC (New Generation Core) via the NG interface. More specifically, the gNBs are connected to the AMF (Access and Mobility Management Function) via the N2 interface and to the UPF (User Plane Function) via the N3 interface.

[0069] FIG. 2 illustrates the frame structure in a wireless communication system to which the present disclosure is applicable.

[0070] The NR system can support multiple numerologies. Here, the numerology may be defined by the subcarrier spacing and the cyclic prefix (CP: Cyclic Prefix) overhead. At this time, the multiple subcarrier spacings may be derived by scaling the basic (reference) subcarrier spacing by an integer N (or μ). Also, even assuming that a very low subcarrier spacing is not used at a very high carrier frequency, the numerology used may be selected independently of the frequency band. Also, in the NR system, various frame structures with multiple numerologies may be supported.

[0071] The OFDM numerologies and frame structures that can be considered in the NR system are described below. A plurality of OFDM numerologies supported in the NR system may be defined as shown in Table 1 below.

[0072]

Table 1

[0073] NR supports multiple numerologies (or subcarrier spacings (SCS)) for supporting various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands. When the SCS is 30 kHz / 60 kHz, it supports dense-urban areas, lower latency, and wider carrier bandwidths. When the SCS is 60 kHz or higher, it supports bandwidths greater than 24.25 GHz to overcome phase noise. The NR frequency band is defined as two types (FR1, FR2) of frequency ranges. FR1 and FR2 may be configured as shown in Table 2 below. Also, FR2 can mean millimeter wave (mmW).

[0074]

Table 2

[0075] In relation to the frame structure in the NR system, the sizes of various fields in the time domain are multiples of the time unit of T c = 1 / (Δf max ·N f ). Here, Δf max = 480·10 3 Hz, and N fis 4096. Downlink and uplink transmissions are carried out at T f = 1 / (Δf max N f / 100)·T c and are composed of radio frames each having a period of T sf = (Δf max N f / 1000)·T c = 1 ms and consisting of 10 subframes.

[0076] In this case, there may be a set of frames for the uplink and a set of frames for the downlink. Also, the transmission at the uplink frame number i from the terminal must start T TA = (N TA + N TA,offset )T c before the start of the corresponding downlink frame at the terminal. For the subcarrier spacing configuration μ, the slots are numbered in increasing order of n s μ ∈ {0,..., N slot subframe,μ -1} within a subframe and in increasing order of n s,f μ ∈ {0,..., N slot frame,μ -1} within a radio frame. One slot is composed of N symb slot consecutive OFDM symbols, where N symb slot is determined by the CP. In a subframe, the start of slot n s μ is at OFDM symbol n s μ N symb slotis aligned in time with the start. Not all terminals can transmit and receive simultaneously, which means that not all OFDM symbols in a downlink slot or an uplink slot can be used.

[0077] Table 3 shows the number of OFDM symbols per slot (N symb slot ), the number of slots per radio frame (N slot frame,μ ), and the number of slots per subframe (N slot subframe,μ ) in the normal CP, and Table 4 shows 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.

[0078]

Table 3

[0079]

Table 4

[0080] FIG. 2 is an example when μ = 2 (SCS is 60 kHz). Referring to Table 3, one subframe may include 4 slots. The one subframe = {1, 2, 4} slots shown in FIG. 2 is an example, and the number of slots that can be included in one subframe is defined as in Table 3 or Table 4. Also, a mini-slot may include 2, 4, or 7 symbols, or more or fewer symbols. In relation to the physical resources in the NR system, antenna port, resource grid, resource element, resource block, carrier part, etc. may be considered.

[0081] The physical resources that can be considered in the NR system will be specifically described below. First, regarding the antenna port, the antenna port is defined such that the channel through which the symbols on the antenna port are carried can be inferred from the channels through which other symbols on the same antenna port are carried. When the large-scale properties of the channel through which the symbols on one antenna port are carried can be inferred from the channels through which the symbols on other antenna ports are carried, it can be said that the two antenna ports are in a QC / QCL (quasi co-located or quasi co-location) relationship. Here, the large-scale properties include any one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0082] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure is applicable.

[0083] Referring to FIG. 3, the resource grid is composed of N RB μ N sc RB sub-carriers, and it is exemplarily described that one sub-frame is composed of 14·2 μ OFDM symbols, but it is not limited thereto. In the NR system, the transmitted signal is described by one or more resource grids composed of N RB μ N sc RB sub-carriers and 2 μ N symb (μ) OFDM symbols. Here, N RB μ ≦N RBmax,μ is. The said N RB max,μ represents the maximum transmission bandwidth, which may vary not only in numerology but also between the uplink and downlink.

[0084] In this case, one resource grid may be set separately for each of 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 the index pair JPEG0007709606000005.jpg721. Here, k = 0,..., N RB μ N sc RB −1 is an index in the frequency domain, JPEG0007709606000006.jpg782 represents the position of the symbol within the subframe. When indicating a resource element in a slot, the index pair (k, l) is used. Here, l = 0,..., N symb μ −1. The resource element for μ and antenna port p JPEG0007709606000007.jpg722 is a complex value corresponds to JPEG0007709606000008.jpg911. When there is no risk of confusion or when a specific antenna port or numerology is not specified, the indices p and μ may be dropped, and as a result, the complex value may become JPEG0007709606000009.jpg1030. Also, a resource block (RB) is defined as N sc RB = 12 consecutive subcarriers in the frequency domain.

[0085] Point A serves as a common reference point for the resource block grid and is obtained as follows.

[0086] - For the downlink of the primary cell (PCell), offsetToPointA indicates the frequency offset between the lowest subcarrier of the lowest resource block that overlaps with the SS / PBCH block used by the terminal for initial cell selection and point A. It is expressed in units of resource blocks assuming a 15 kHz subcarrier spacing for FR1 and a 60 kHz subcarrier spacing for FR2.

[0087] - absoluteFrequencyPointA indicates the frequency-position of point A expressed as in the absolute radio-frequency channel number (ARFCN). The common resource block is numbered upward from 0 in the frequency domain for the subcarrier spacing setting μ. The center of subcarrier 0 of common resource block 0 for the subcarrier spacing setting μ coincides with 'point A'. In the frequency domain, for common resource block number n CRB μ The relationship with the resource element (k, l) for the subcarrier spacing setting μ is given as in Equation 1 below.

[0088]

Equation

[0089] In Equation 1, k is defined relative to point A such that k = 0 corresponds to the subcarrier centered on point A. The physical resource block is numbered from 0 to N BWP,i size,μ -1 within the bandwidth part (BWP), and i is the number of the BWP. In BWP i, the relationship between physical resource block n PRB and common resource block n CRB is given by Equation 2 below.

[0090]

Equation

[0091] N BWP,i start,μ is a common resource block where the BWP starts relative to the common resource block 0.

[0092] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure is applicable. And FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure is applicable.

[0093] Referring to FIGS. 4 and 5, a slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one slot includes 7 symbols, while in the case of extended CP, one slot includes 6 symbols.

[0094] A carrier includes a plurality of subcarriers in the frequency domain. An RB (Resource Block) is defined as a plurality (e.g., 12) of consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined as a plurality of consecutive (physical) resource blocks in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication is performed on the activated BWP, and only one BWP may be activated for one terminal. Each element in the resource grid is called a resource element (RE), and one complex symbol may be mapped.

[0095] The NR system may support up to 400 MHz per component carrier (CC). If a terminal operating on such a wideband CC always operates with the radio frequency (RF) chip for the entire CC turned on, the terminal battery consumption may increase. Alternatively, considering various use cases (e.g., eMBB, URLLC, Mmtc, V2X, etc.) operating within one wideband CC, different numerologies (e.g., subcarrier spacing, etc.) may be supported for different frequency bands within the CC. Alternatively, the capabilities of terminals may vary with respect to the maximum bandwidth. Taking this into account, the base station may instruct the terminal to operate only on a partial bandwidth rather than the entire bandwidth of the wideband CC. For convenience, the partial bandwidth is defined as the bandwidth part (BWP). The BWP may be composed of consecutive resource blocks (RBs) on the frequency axis and may correspond to one numerology (e.g., subcarrier spacing, cyclic prefix (CP) length, slot / minislot duration).

[0096] On the other hand, the base station can configure multiple BWPs within one CC configured for a terminal. For example, a BWP that occupies a relatively small frequency region may be configured in the PDCCH monitoring slot, and the PDSCH indicated by the PDCCH may be scheduled on a larger BWP than that.

[0097] Alternatively, when UEs concentrate on a specific BWP, other BWPs may be configured for some terminals for load balancing. Alternatively, considering frequency domain inter-cell interference cancellation between adjacent cells, etc., a part of the spectrum of the entire bandwidth may be excluded, and both BWPs can be configured even within the same slot. That is, the base station can configure at least one DL / UL BWP for the terminal associated with the wideband CC.

[0098] The base station can activate at least one of the DL / UL BWPs set at a specific time point (by means of L1 signaling, MAC CE (Control Element), RRC signaling, etc.). Also, the base station can instruct switching to other set DL / UL BWPs (by means of L1 signaling, MAC CE, RRC signaling, etc.). Or, when the timer value expires based on a timer, it may switch to a defined DL / UL BWP. At this time, the activated DL / UL BWP is defined as the active DL / UL BWP.

[0099] However, in situations such as when the terminal is in the process of initial connection (initial access) or before the RRC connection is set up, the terminal may not be able to receive the settings for the DL / UL BWP. Therefore, the DL / UL BWP assumed by the terminal in such a situation is defined as the initial active DL / UL BWP.

[0100] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure is applicable and a general signal transmission / reception method using them.

[0101] In a wireless communication system, the terminal receives information from the base station on the downlink, and the terminal transmits information to the base station on the uplink. The information transmitted and received by the base station and the terminal includes data and various control information, and there are various physical channels depending on the type / use of the information they transmit and receive.

[0102] When the terminal is powered on or newly enters a cell, it performs initial cell search (Initial cell search) operations such as synchronizing with the base station (S601). To do this, the terminal receives the primary synchronization signal (PSS) and secondary synchronization signal (SSS) from the base station to synchronize with the base station and obtain information such as the cell identifier (ID: Identifier). After that, the terminal can receive the physical broadcast channel (PBCH) from the base station to obtain the in-cell broadcast information. On the other hand, the terminal can receive the downlink reference signal (DL RS) in the initial cell search stage to check the downlink channel state.

[0103] After completing the initial cell search, the terminal can receive the physical downlink control channel (PDCCH) and the information carried on the PDCCH to receive the physical downlink shared channel (PDSCH), and obtain more specific system information (S602).

[0104] On the other hand, when the terminal first connects to the base station or there is no radio resource for signal transmission, the terminal can perform an arbitrary connection process (random access procedure, RACH) with the base station (stages S603 to S606). To do this, the terminal transmits a specific sequence as a preamble on the physical random access channel (PRACH) (S603 and S605), and can receive the response message for the preamble on the PDCCH and the corresponding PDSCH (S604 and S606). In the case of contention-based RACH, furthermore, a contention resolution procedure can be performed.

[0105] After performing the procedures as described above, the terminal can then perform PDCCH / PDSCH reception (S607) and Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) transmission (S608) as general uplink / downlink signal transmission procedures. In particular, the terminal receives downlink control information (DCI) via PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and its formats differ depending on its usage purpose.

[0106] On the other hand, the control information transmitted by the terminal to the base station on the uplink or received by the terminal from the base station includes downlink / uplink ACK / NACK (Acknowledgement / Non - Acknowledgement) signals, CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indicator), etc. In the 3GPP LTE system, the terminal can transmit control information such as the above - mentioned CQI / PMI / RI via PUSCH and / or PUCCH.

[0107] Table 5 shows an example of the DCI format in the NR system.

[0108]

Table 5

[0109] Referring to Table 5, DCI formats 0_0, 0_1, and 0_2 can include resource information related to PUSCH scheduling (e.g., UL / SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), transmission block (transport block, TB) related information (e.g., MCS (Modulation Coding and Scheme), NDI (New Data Indicator), RV (Redundancy Version), etc.), HARQ (Hybrid-Automatic Repeat and request) related information (e.g., process number, DAI (Downlink Assignment Index), PDSCH-HARQ feedback timing, etc.), multiple antenna related information (e.g., DMRS sequence initialization information, antenna port, CSI request, etc.), power control information (e.g., PUSCH power control, etc.), and the control information included in each DCI format may be predefined.

[0110] DCI format 0_0 is used for PUSCH scheduling in one cell. The information included in DCI format 0_0 is transmitted after being CRC (cyclic redundancy check) scrambled by C-RNTI (Cell RNTI:Cell Radio Network Temporary Identifier) or CS-RNTI (Configured Scheduling RNTI) or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI).

[0111] DCI format 0_1 is used to schedule one or more PUSCHs in one cell, or to instruct the terminal with downlink feedback information of a configured grant (CG). The information included in DCI format 0_1 is transmitted after being CRC scrambled by a C-RNTI or a CS-RNTI or an SP-CSI-RNTI (Semi-Persistent CSI RNTI) or an MCS-C-RNTI.

[0112] DCI format 0_2 is used to schedule PUSCH in one cell. The information included in DCI format 0_2 is transmitted after being CRC scrambled by a C-RNTI or a CS-RNTI or an SP-CSI-RNTI or an MCS-C-RNTI.

[0113] Next, DCI formats 1_0, 1_1, and 1_2 can include resource information related to PDSCH scheduling (such as frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.), transmission block (TB) related information (such as MCS, NDI, RV, etc.), HARQ related information (such as process number, DAI, PDSCH-HARQ feedback timing, etc.), multi-antenna related information (such as antenna port, TCI (transmission configuration indicator), SRS (sounding reference signal) request, etc.), PUCCH related information (such as PUCCH power control, PUCCH resource indicator, etc.). The control information included in each DCI format may be defined in advance.

[0114] DCI format 1_0 is used for scheduling the PDSCH in one DL cell. The information included in DCI format 1_0 is transmitted after being CRC scrambled by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0115] DCI format 1_1 is used for scheduling the PDSCH in one cell. The information included in DCI format 1_1 is transmitted after being CRC scrambled by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0116] DCI format 1_2 is used for scheduling the PDSCH in one cell. The information included in DCI format 1_2 is transmitted after being CRC scrambled by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0117] FIG. 7 illustrates a multi-TRP transmission scheme in a wireless communication system to which the present disclosure is applicable.

[0118] Referring to FIG. 7(a), a case is shown where a layer group that transmits the same codeword (CW) / transport block (TB) corresponds to different TRPs. At this time, the layer group can mean a predetermined set of layers composed of one or more layers. In this case, the amount of transmission resources increases due to the large number of layers, and thus there is an advantage that robust channel coding with a low code rate can be used for the TB. Also, since the channels from multiple TRPs are different, an improvement in the reliability of the received signal can be expected based on the diversity gain.

[0119] Referring to FIG. 7(b), an example is shown in which different CWs are transmitted through layer groups corresponding to different TRPs. At this time, it can be assumed that the TBs corresponding to CW #1 and CW #2 in the figure are the same. That is, CW #1 and CW #2 respectively mean that the same TB is converted into different CWs by channel coding or the like by different TRPs. Therefore, it can be regarded as an example of repeated transmission of the same TB. FIG. 7(b) may have a disadvantage that the code rate corresponding to the TB is higher than that of FIG. 7(a) above. However, there is an advantage that the code rate can be adjusted by instructing different RV (redundancy version) values for the encoded bits generated from the same TB according to the channel environment, or the modulation order of each CW can be adjusted.

[0120] According to the methods exemplified in FIGS. 7(a) and 7(b) above, the same TB is repeatedly transmitted in different layer groups, and each layer group is transmitted by different TRPs / panels, so that the data reception probability of the terminal can be increased. This is called the SDM (Spatial Division Multiplexing) - based M - TRP URLLC transmission method. Layers belonging to different layer groups are respectively transmitted through DMRS ports belonging to different DMRS CDM groups.

[0121] Also, the content related to the multiple TRPs described above is explained based on the SDM (spatial division multiplexing) method that uses different layers. However, this is of course also applicable by extension to the FDM (frequency division multiplexing) method based on different frequency - domain resources (for example, RB / PRB (sets), etc.) and / or the TDM (time division multiplexing) method based on different time - domain resources (for example, slots, symbols, sub - symbols, etc.).

[0122] Regarding the method for multi-TRP-based URLLC scheduled by a single DCI, the following methods are being discussed.

[0123] 1) Method 1 (SDM): Time and frequency resource allocations overlap, and there are n (n <= Ns) TCI states within a single slot.

[0124] 1-a) Method 1a

[0125] - At each transmission occasion, the same TB is transmitted by one layer or a set of layers, and each layer or each set of layers is associated with one TCI and one set of DMRS ports.

[0126] - A single codeword with one RV is used for all spatial layers or all sets of layers. From the UE's perspective, differently coded bits are mapped to different layers or sets of layers by the same mapping rule.

[0127] 1-b) Method 1b

[0128] - At each transmission occasion, the same TB is transmitted by one layer or a set of layers, and each layer or each set of layers is associated with one TCI and one set of DMRS ports.

[0129] - A single codeword with one RV is used for each spatial layer or each set of layers. The RVs corresponding to each spatial layer or each set of layers may be the same or different from each other.

[0130] 1-c) Method 1c

[0131] - At one transmission occasion, the same TB with one DMRS port associated with multiple TCI state indexes is transmitted on one layer, or the same TB with multiple DMRS ports associated one-to-one with multiple TCI state indexes is transmitted on one layer.

[0132] In the previous methods 1a and 1c, the same MCS is applied to all layers or all sets of layers.

[0133] 2) Method 2 (FDM): Frequency resource allocations do not overlap, and there are n (n <= Nf) TCI states within a single slot

[0134] - Each non-overlapping frequency resource allocation is associated with one TCI state.

[0135] - The same single / multiple DMRS ports are associated with all non-overlapping frequency resource allocations.

[0136] 2-a) Method 2a

[0137] - A single codeword with one RV is used for all resource allocations. From the perspective of the UE, common RB matching (mapping of the codeword to layers) is applied for all resource allocations.

[0138] 2-b) Method 2b

[0139] - A single codeword with one RV is used for each non-overlapping frequency resource allocation. The RVs corresponding to each non-overlapping frequency resource allocation may be the same or different.

[0140] For the previous method 2a, the same MCS is applied to all non-overlapping frequency resource allocations.

[0141] 3) Technique 3 (TDM): The time resource allocations do not overlap, and there are n (n <= Nt1) TCI states within a single slot

[0142] - Each transmission occasion of the TB has the time granularity of a mini-slot and has one TCI and one RV.

[0143] - The same MCS is used for single or multiple DMRS ports at all transmission occasions within the slot.

[0144] - RV / TCI may be the same or different at different transmission occasions.

[0145] 4) Technique 4 (TDM): n (n <= Nt2) TCI states in K (n <= K) different slots

[0146] - Each transmission occasion of the TB has one TCI and one RV.

[0147] - The same MCS is used for single or multiple DMRS ports at all transmission occasions over K slots.

[0148] - RV / TCI may be the same or different at different transmission occasions.

[0149] Downlink Multiple TRP (M-TRP) Transmission Operation

[0150] The M-TRP transmission mode in which M TRPs transmit data to one terminal can be broadly classified into two types: the eMBB M-TRP transmission mode, which is a method for increasing the transmission rate, and the URLLC M-TRP transmission mode, which is a method for increasing the reception success rate and reducing latency.

[0151] Also, from the perspective of DCI transmission, the M-TRP transmission mode can be distinguished into: i) an M-DCI (multiple DCI)-based M-TRP transmission mode in which each TRP transmits a different DCI, and ii) an S-DCI (single DCI)-based M-TRP transmission mode in which one TRP transmits the DCI. As an example, for S-DCI, all the scheduling information for the data transmitted by the M-TRP must be transmitted in one DCI, and it may be used in an ideal BackHaul (BH) environment where dynamic cooperation between two TRPs is possible.

[0152] In the M-DCI-based M-TRP transmission mode, since each of the multiple TRPs transmits a scheduling DCI, the M-DCI-based M-TRP transmission mode may be used not only in an ideal BH but also in a non-ideal BH environment.

[0153] In the M-DCI-based M-TRP transmission mode, the CORESET in which each TRP transmits the DCI may be segmented. Also, the terminal may recognize the PUSCH (or PUCCH) scheduled by the DCI received in different CORESETs (or CORESETs belonging to different CORESET groups) as PUSCH (or PUCCH) transmitted to different TRPs, or may recognize them as PUSCH (or PUCCH) of different TRPs.

[0154] Also, the method for UL transmission (e.g., PUSCH / PUCCH) transmitted to different TRPs may be equally applicable to UL transmission (e.g., PUSCH / PUCCH) transmitted to different panels belonging to the same TRP.

[0155] NCJT (Non-Coherent Joint Transmission) Method

[0156] The NCJT mode means a mode in which multiple transmission points (TPs) transmit data to one terminal using the same time / frequency, and different DMRS ports are used between the TPs, enabling data transmission on different layers. The TP can transmit data scheduling information to the terminal receiving NCJT via DCI.

[0157] At this time, the method in which each TP participating in NCJT transmits the scheduling information for the data it transmits via DCI can be referred to as multi-DCI-based NCJT. Since each of the N TPs participating in NCJT transmission transmits the DL grant DCI and PDSCH to the terminal, the terminal can receive N DCIs and N PDSCHs from the N TPs.

[0158] In contrast, the method in which one representative TP transmits the scheduling information for the data it transmits and the data transmitted by other TPs via one DCI can be referred to as single-DCI-based NCJT. At this time, the N TPs can transmit one PDSCH. At this time, each TP can transmit only a part of the multiple layers that make up one PDSCH. For example, when 4-layer data is transmitted, TP1 transmits 2 layers, and TP2 transmits the remaining 2 layers to the terminal.

[0159] Hereinafter, the multi-DCI-based NCJT mode and the single-DCI-based NCJT mode will be specifically described.

[0160] First, in the single-DCI-based M-TRP mode, the M-TRP can perform coordinated transmission of a common single PDSCH together, and each TRP participating in the coordinated transmission can spatially divide and transmit the PDSCH to different layers (i.e., different DMRS ports). At this time, the scheduling information for the PDSCH is indicated to the terminal via one DCI, and the DCI may indicate the QCL RS and QCL type information used for each DMRS port.

[0161] At this time, the above-described method is different from the method of indicating the QCL RS and type commonly applied to all DMRS ports by DCI. That is, M TCI states are indicated in the TCI field in the DCI (when it is 2TRP coordinated transmission, M = 2), and the QCL RS and type may be recognized for each of the M DMRS port groups using M different TCI states. Also, the DMRS port information may be indicated using a new DMRS table.

[0162] And in the multi-DCI-based M-TRP method, each of the M-TRPs can transmit different DCIs and PDSCHs, and the PDSCHs may be transmitted (partially or entirely) overlapping on the frequency / time resources. The PDSCHs are scrambled with different scrambling IDs, and the DCIs may be transmitted by the CORESETs belonging to different CORESET groups.

[0163] Here, the CORESET group can recognize the index defined in the CORESET configuration information corresponding to each CORESET. For example, when the index is set to 0 in the CORESET configuration information corresponding to CORESET 1 and 2, and the index is set to 1 in the CORESET configuration information corresponding to CORESET 3 and 4, CORESET 1 and 2 may belong to CORESET group 0, and CORESET 3 and 4 may belong to CORESET group 1.

[0164] Also, when the index is not defined on the configuration information corresponding to the CORESET, the index corresponding to the CORESET can be parsed as 0. When multiple scrambling IDs are set in one serving cell or two or more CORESET groups are set, the terminal can recognize that it receives data in the multi-DCI-based M-TRP method.

[0165] The CORESET group ID described / mentioned in this disclosure can mean an index / identification information (e.g., ID) for distinguishing CORESETs for each TRP / panel. And the CORESET group can be a group / union of CORESETs distinguished by an index / identification information (e.g., ID) / the said CORESET group ID for distinguishing CORESETs for each TRP / panel.

[0166] For example, the CORESET group ID can be specific index information defined within the CORESET configuration information. As an example, the CORESET group can be set / instructed / defined by the index defined in the CORESET configuration information for each CORESET.

[0167] As an addition or alternative, the CORESET group ID can mean an index / identification information / indicator for distinguishing between CORESETs set / associated with each TRP / panel. The CORESET group ID described / mentioned in this disclosure can be rephrased as a specific index / specific identification information / specific indicator for distinguishing between CORESETs set / associated with each TRP / panel.

[0168] The said CORESET group ID, that is, the specific index / specific identification information / specific indicator for distinguishing between CORESETs set / associated with each TRP / panel, can be set / instructed by higher layer signaling (e.g., RRC signaling) / L2 signaling (e.g., MAC-CE) / L1 signaling (e.g., DCI).

[0169] For example, it can be set / instructed such that PDCCH detection is performed for each TRP / panel in units of the said CORESET group.

[0170] As an addition or alternative, uplink control information (e.g., CSI, HARQ-A / N, SR) and / or uplink physical channel resources (e.g., PUCCH / PRACH / SRS resources) may be set / instructed to be separately managed / controlled for each TRP / panel in units of the CORESET group.

[0171] As an addition or alternative, HARQ A / N (process / resending) for PDSCH / PUSCH etc. scheduled for each TRP / panel in units of the CORESET group may be managed.

[0172] For example, the upper layer parameter "ControlResourceSet IE (information element)" may be used to set a time / frequency control resource set (control resource set, CORESET).

[0173] As an example, the control resource set (CORESET) may be related to the detection and reception of downlink control information. The "ControlResourceSet IE" may include a CORESET-related ID (e.g., "controlResourceSetID"), an index of the CORESET pool for the CORESET (e.g., "CORESETPoolIndex"), the time / frequency resource setting of the CORESET, and / or TCI information related to the CORESET, etc.

[0174] As an example, the index of the CORESET pool (e.g., "CORESETPoolIndex") may be set to 0 or 1. In the above description, the CORESET group may correspond to the CORESET pool, and the CORESET group ID may correspond to the CORESET pool index (e.g., "CORESETPoolIndex").

[0175] As an addition or alternative, for each CORESET, the terminal may be provided with a CORESET index by a "ControlResourceSet IE (information element)", an initial value of the DM-RS scrambling sequence by a "pdcch-DMRS-ScramblingID", a precoder granularity with respect to the number of REGs in the frequency domain, the number of consecutive symbols provided by a "duration" (i.e., a consecutive time interval of the CORESET), the number of RBs, TCI information, and / or CCE-to-REG mapping parameters, etc.

[0176] Whether it is a single DCI-based M-TRP scheme or a multi-DCI-based M-TRP scheme may be indicated to the terminal by another signaling. As an example, when a plurality of CRS (cell-specific reference signal) patterns are indicated to the terminal for M-TRP operation for one serving cell, the PDSCH rate matching for the CRS may be different depending on whether it is a single DCI-based M-TRP scheme or a multi-DCI-based M-TRP scheme. Here, a TRS (tracking reference signal) may be used as a function of the CRS, and the terminal may estimate the timing offset, delay spread, frequency offset, and Doppler spread using the TRS.

[0177] And NCJT may be classified into a fully overlapped NCJT where the time-frequency resources transmitted by each TP are completely overlapped, and a partially overlapped NCJT where only some of the time-frequency resources are overlapped. That is, in the case of a partially overlapped NCJT, the data of both TP1 and TP2 may be transmitted in some time-frequency resources, and only the data of either TP1 or TP2 may be transmitted in the remaining time-frequency resources.

[0178] In the M-TRP NCJT transmission mode, two TRPs can transmit different data using different layers / DMRS ports from each other.

[0179] For example, DMRS ports belonging to different CDM groups can be grouped. And the DMRS ports belonging to the first CDM group may be received using the first QCL beam information (i.e., the first TCI state indicated), and the DMRS ports belonging to the second CDM group may be received using the second QCL beam information (i.e., the second TCI state indicated).

[0180] As described above, since the layers / DRMS ports transmitted by two TRPs are separated from each other and data is not transmitted through a combined channel, it is not necessary to align the channel phases of the two TRPs. This mode can be referred to as the (M-TRP) NCJT mode or the independent layer NCJT mode.

[0181] M-TRP URLLC Transmission Operation

[0182] The DL M-TRP URLLC transmission mode means a mode in which multiple TPRs transmit the same data / DCI using different spatial (e.g., layer / port) / time / frequency resources from each other. For example, TRP1 can transmit specific data / DCI at resource 1, and TRP2 can transmit the specific data / DCI (i.e., the same data / DCI) at resource 2.

[0183] That is, when the DL M-TRP URLLC transmission mode is set, the terminal can receive the same data / DCI using different spatial / time / frequency resources from each other. At this time, the terminal can receive an indication from the base station regarding the QCL RS / type (i.e., DL TCI state) used for the spatial / time / frequency resources for receiving the data / DCI.

[0184] For example, when the data / DCI is received on resource 1 and resource 2, the terminal may be instructed by the base station about the DL TCI state used on resource 1 and the DL TCI state used on resource 2. By receiving the data / DCI on resource 1 and resource 2, the terminal can achieve high reliability. Such an M-TRP URLLC transmission method may be applied to PDSCH / PDCCH.

[0185] The UL M-TRP URLLC transmission method means a method in which multiple TRPs receive the same data / UCI from one terminal using different spatial / temporal / frequency resources. For example, TRP1 can receive the same data / UCI from the terminal on resource 1, and TRP2 can receive the same data / UCI from the terminal on resource 2. Then, TRP1 and TRP2 can share the data / UCI received from the terminal through a backhaul link (connected between the TRPs).

[0186] That is, when the UL M-TRP URLLC transmission method is set, the terminal can transmit the same data / UCI to each TRP using different spatial / temporal / frequency resources. At this time, the terminal may be instructed by the base station about the Tx beam and Tx power (i.e., UL TCI state) used in the spatial / temporal / frequency resources for transmitting the same data / UCI. For example, when the same data / UCI is transmitted on resource 1 and resource 2, the terminal may be instructed by the base station about the UL TCI state used on resource 1 and the UL TCI state used on resource 2. Such UL M-TRP URLLC may be applied to PUSCH / PUCCH.

[0187] Also, in the description of the present disclosure, when receiving / sending data / DCI / UCI on a specific space / time / frequency resource and using (or mapping) a specific TCI state (or TCI), in the DL, it can mean estimating a channel from DMRS using the QCL type and QCL RS indicated by the specific TCI state on the specific space / time / frequency resource, and receiving / demodulating data / DCI / UCI using the estimated channel.

[0188] And when receiving / sending data / DCI / UCI on a specific space / time / frequency resource and using (or mapping) a specific TCI state (or TCI), in the UL, it can mean transmitting / modulating DMRS and data / UCI using the Tx beam and / or Tx power indicated by the specific TCI state on the specific space / time / frequency resource.

[0189] And the UL TCI state may include the Tx beam or Tx power information of the terminal. And the base station can configure the terminal using other parameters such as spatial relation information instead of the TCI state.

[0190] For example, the UL TCI state may be directly indicated to the terminal by UL grant DCI. Or, the UL TCI state can mean the spatial relation information of the SRS resource indicated by the SRI (SRS resource indicator) field of the UL grant DCI. Or, the UL TCI state can mean the open loop (OP) Tx power control parameter concatenated to the value indicated by the SRI field of the UL grant DCI.

[0191] Here, the OL Tx power control parameter may include, for example, an index for the j(OP parameter Po and alpha (up to 32 parameter value sets per cell), q_d (index of the DL RS resource for PL (path loss) measurement (up to 4 measurements per cell), or / and I (closed-loop power control process index (up to 2 processes per cell)).

[0192] As yet another example of the present disclosure, the M-TRP eMBB transmission mode means a mode in which the M-TRPs transmit different data / DCI using different spatial / temporal / frequency resources. When the M-TRP eMBB transmission mode is set, the terminal may be instructed by the DCI with multiple TCI states from the base station, and assuming that the received data is different data using the QCL RS indicated by each of the multiple TCI states.

[0193] And, by separately using the M-TRP URLLC RNTI and the M-TRP eMBB RNTI, the terminal can determine whether a specific transmission / reception is M-TRP URLLC transmission / reception or M-TRP eMBB transmission / reception. For example, when the URLLC RNTI is used for CRC masking of the DCI, the terminal can determine that the transmission is URLLC transmission. And when the eMBB RNTI is used for CRC masking of the DCI, the terminal can determine that the transmission is eMBB transmission. As yet another example, the base station can set the M-TRP URLLC transmission / reception mode or the M-TRP eMBB transmission / reception mode for the terminal by new signaling.

[0194] For the convenience of explaining the present disclosure, it is assumed that two TRPs cooperate with each other to perform transmission / reception operations, but it is not limited thereto. That is, the present disclosure can be extended and applied in a multi-TRP environment of three or more, and can also be extended and applied in an environment where transmission / reception is performed using different panels or beams in the same TRP. The terminal can recognize different TRPs as different TCI states. When the terminal transmits / receives data / DCI / UCI using TCI state 1, it means that the data / DCI / UCI is transmitted / received from (or to) TRP1.

[0195] The present disclosure may be utilized in a situation where M-TRP cooperatively transmits PDCCH (repeatedly transmits the same PDCCH or transmits it separately). Also, the present disclosure will be utilized in a situation where M-TRP cooperatively transmits PDSCH or cooperatively receives PUSCH / PUCCH.

[0196] Also, in the description of the present disclosure, the meaning that multiple base stations (i.e., M-TRP) repeatedly transmit the same PDCCH can mean that the same DCI is transmitted via multiple PDCCH candidates, which is the same as the meaning that multiple base stations repeatedly transmit the same DCI. Here, two DCIs with the same DCI format / size / payload may be regarded as the same DCI.

[0197] Or, even if the payloads of two DCIs are different, if the scheduling results are the same, the two DCIs may be regarded as the same DCI. For example, the time domain resource allocation (TDRA) field of the DCI can relatively determine the slot / symbol position of the data and the slot / symbol position of A(ACK) / N(NACK) based on the reception time of the DCI.

[0198] At this time, when the DCI received at time n and the DCI received at time n+1 indicate the same scheduling result to the terminal, the TDRA fields of both DCIs change, and as a result, the DCI payloads become different from each other. Therefore, even if the payloads of the two DCIs are different, if the scheduling results are the same, both DCIs may be regarded as the same DCI. Here, the number of repetitions R may be directly indicated by the base station to the terminal or may be mutually agreed upon.

[0199] Alternatively, if the payloads of the two DCIs are different and the scheduling results are not the same, and if the scheduling result of one DCI is a subset of the scheduling result of the other DCI, both DCIs may be regarded as the same DCI.

[0200] For example, when the same data is TDM'ed and repeatedly transmitted N times, DCI 1 received before the first data indicates (or schedules) N data repetitions, and DCI 2 received before the second data indicates (schedules) N-1 data repetitions. At this time, the scheduling result (or data) of DCI 2 is a subset of the scheduling result (or data) of DCI 1, and both DCIs have scheduling results for the same data. Therefore, in this case as well, the two DCIs may be regarded as the same DCI.

[0201] And in the description of the present disclosure, the fact that a plurality of base stations (i.e., M-TRP) transmit the same PDCCH separately means that one DCI is transmitted via one PDCCH candidate, but TRP1 transmits a part of the resources defined for the PDCCH candidate, and TRP2 transmits the remaining resources.

[0202] For example, when TRP1 and TRP2 separately transmit PDCCH candidates corresponding to the aggregation level m1 + m2, the PDCCH candidates can be divided into PDCCH candidate 1 corresponding to the aggregation level m1 and PDCCH candidate 2 corresponding to the aggregation level m2, and TRP1 can transmit PDCCH candidate 1 while TPR2 can transmit PDCCH candidate 2. At this time, TRP1 and TRP2 can transmit PDCCH candidate 1 and PDCCH candidate 2 using different time / frequency resources. After the terminal receives PDCCH candidate 1 and PDCCH candidate 2, it can generate a PDCCH candidate corresponding to the aggregation level m1 + m2 and attempt DCI decoding.

[0203] At this time, the method of separately transmitting the same DCI to a plurality of PDCCH candidates may be implemented as the following two methods.

[0204] The first method is a method in which a DCI payload (for example, control information + CRC) is encoded by one channel encoder (for example, a polar encoder) and separately transmitted to two TRPs. That is, the first method means a method of dividing the obtained coded bits into two TRPs according to the encoding result. Here, the entire DCI payload may be encoded in the coded bits transmitted by each TRP, but it is not limited thereto, and only a part of the DCI payload may be encoded.

[0205] The second method is a method in which a DCI payload (for example, control information + CRC) is divided into two DCIs (for example, DCI 1 and DCI 2) and then each is encoded by a channel encoder (for example, a polar encoder). Thereafter, each of the two TRPs can transmit the coded bits corresponding to DCI 1 and the coded bits corresponding to DCI 2 to the terminal.

[0206] That is, the meaning that multiple base stations (M-TRP) transmit the same PDCCH separately / repeatedly over multiple monitoring occasions (MO) means: 1) Does it mean repeating and transmitting the coded bits obtained by encoding the entire DCI content of the PDCCH separately for each base station (S-TRP) in each MO? 2) Does it mean dividing the coded bits obtained by encoding the entire DCI content of the PDCCH into multiple parts, and each base station (S-TRP) transmits different parts in each MO? 3) Can it mean dividing the DCI content of the PDCCH into multiple parts, separately encoding (i.e., separate encoding) different parts for each base station (S-TRP), and transmitting them in each MO?

[0207] Repeating / separating the transmission of the PDCCH may be understood as transmitting the PDCCH multiple times over multiple transmission occasions (TO).

[0208] Here, TO can mean a specific time or / and frequency resource unit at which the PDCCH is transmitted. For example, when the PDCCH is transmitted multiple times over slots 1, 2, 3, 4 (in a specific resource block (RB)), TO can mean each slot. As another example, when the PDCCH is transmitted multiple times over RB sets 1, 2, 3, 4 (in a specific slot), TO can mean each RB set. As yet another example, when the PDCCH is transmitted multiple times over different times and frequencies, TO can mean each time / frequency resource. Also, the transmission configuration indicator (TCI) states used for demodulation reference signal (DMRS) channel estimation may be set differently for each TO. TOs with different TCI states set can be assumed to be transmitted by different transmit and receive points (TRP) / panels.

[0209] The fact that multiple base stations transmit the PDCCH repeatedly or separately means that the PDCCH is transmitted over multiple TOs, and the union of the TCI states set for the TOs is composed of two or more TCI states. For example, when the PDCCH is transmitted over TOs 1, 2, 3, and 4, TCI states 1, 2, 3, and 4 may be set for each of TOs 1, 2, 3, and 4, which means that TRP i has cooperatively transmitted the PDCCH at TO i.

[0210] In the description of the present disclosure, the fact that a terminal repeatedly transmits the same PUSCH to multiple base stations (i.e., M-TRP) can mean that the terminal transmits the same data via multiple PUSCHs, and each PUSCH may be transmitted optimized for the UL channels of different TRPs.

[0211] For example, the terminal can repeatedly transmit the same data using PUSCH1 and PUSCH2. At this time, PUSCH1 is transmitted using the UL TCI state 1 for TRP1, and link adaptation such as a precoder / MCS is also scheduled with values optimized for the channel of TRP1, and then PUSCH may be transmitted. PUSCH2 is transmitted using the UL TCI state 2 for TRP2, and link adaptation such as a precoder / MCS is also scheduled with values optimized for the channel of TRP2, and then PUSCH may be transmitted. At this time, the repeatedly transmitted PUSCH1 and PUSCH2 are transmitted at different times and may be TDM, FDM, or SDM.

[0212] Also, in the description of the present disclosure, the fact that a terminal separately transmits the same PUSCH to multiple base stations (i.e., M-TRP) can mean that one data is transmitted via one PUSCH, but the resources assigned to the PUSCH are divided and optimized for the UL channels of different TRPs and then transmitted.

[0213] For example, the terminal can transmit the same data using a 10-symbol PUSCH. At this time, among the 10 symbols, the first 5 symbols may be transmitted using UL TCI state 1 for TRP1, and the terminal may also schedule values optimized for the channel of TRP1 for link adaptation such as pre-coder / MCS, and can transmit a 5-symbol PUSCH (to TRP1). The remaining 5 symbols may be transmitted using UL TCI state 2 for TRP2, and the terminal may also schedule values optimized for the channel of TRP2 for link adaptation such as pre-coder / MCS, and can transmit the remaining 5-symbol PUSCH (to TRP2).

[0214] In the above example, a method of dividing one PUSCH into time resources and performing TDM for transmission to TRP1 and transmission to TRP2 has been described, but the present disclosure is not limited thereto, and the terminal may also divide the same PUSCH and transmit it to a plurality of base stations by diverting the FDM / SDM method.

[0215] The terminal can repeatedly transmit PUCCH to a plurality of base stations (similarly to PUSCH transmission) or divide and transmit the same PUCCH.

[0216] And, in order to repeatedly transmit or divide and transmit PDCCH / PDSCH / PUSCH / PUCCH, when a plurality of TOs are instructed to the terminal, each TO may be for UL transmission directed to a specific TRP or for DL reception from a specific TRP. At this time, the UL TO (or, the TO of TRP1) transmitted to TRP1 can mean a TO that uses the first value among two spatial relations, two UL TCIs, two UL power control parameters, or two PL (pathloss)-RSs instructed to the terminal. And the UL TO (or, the TO of TRP2) transmitted to TRP2 means a TO that uses the second value among two spatial relations, two UL TCIs, two UL power control parameters, two PL-RSs instructed to the terminal.

[0217] Similar to this during DL transmission, the DL TO transmitted by TRP1 (or the TO of TRP1) means a TO that uses the value of the first one among the two DL TCI states instructed to the terminal (for example, when two TCI states are set in the CORESET), and the DL TO transmitted by TRP2 (or the TO of TRP2) can mean a TO that uses the value of the second one among the two DL TCI states instructed to the terminal (for example, when two TCI states are set in the CORESET).

[0218] The present disclosure can be extended and applied to various channels such as PUSCH / PUCCH / PDSCH / PDCCH. Also, the present disclosure can be extended and applied to both cases where the channels are repeatedly transmitted in different space / time / frequency resources from each other and cases where they are transmitted separately.

[0219] As an addition or alternative, in an improved wireless system, for M-TRP based PUCCH repeated transmission, two spatial relation infos may be set for the PUCCH resource.

[0220] That is, when PC (power control) parameters such as PL-RS, alpha, P0, and closed loop index are included / set on each spatial relation info, spatial relation RS may be set. As a result, PC information and spatial relation RS information corresponding to two TRPs may be set using the two spatial relation infos. Then, the terminal can transmit PUCCH using the first spatial relation info at TO1 and transmit the same UCI (that is, CSI, ACK / NACK, SR) via PUCCH using the second spatial relation info at TO2.

[0221] In the description of the present disclosure, a PUCCH resource with two spatial relation infos set is named as an M-TRP PUCCH resource, and a PUCCH resource with one spatial relation info set is named as an S-TRP PUCCH resource.

[0222] The QCL type-D RS or / and TCI state (i.e., TCI) can mean a spatial parameter (i.e., the QCL reference RS from the beam perspective), and can be extended and analyzed with reference to the RS or source RS for the parameter or other beam / space-related parameters.

[0223] As an addition or alternative, in an environment where analog beamforming is not used, such as in a low-frequency band, the indication of the QCL type-D RS may be omitted. At this time, in the present disclosure, the QCL type-D RS can also be analyzed as the QCL reference RS. That is, when there is only one reference RS due to the TCI state, the QCL type-D RS can indicate the RS.

[0224] As an addition or alternative, from the UL perspective, the TCI state (or simply TCI) may indicate including the reference / source RS for the UL beam, and may indicate the spatial relationship RS (or / and the pathloss RS) in the basic wireless communication system. Here, the pathloss RS may be the same as the RS, and may be associated with the UL TCI state or set separately.

[0225] STxMP (Simultaneous Transmission Across Multiple Panels) Transmission Method

[0226] In an improved wireless communication system, by supporting the STxMP transmission of the terminal, the uplink transmission-related capacity, coverage, and / or reliability can be improved. STxMP transmission means a method of performing UL simultaneous transmission by simultaneously generating a plurality of transmission beams by a plurality of panels of the terminal.

[0227] The STxMP transmission scheme may be classified into i) a scheme (Scheme 1) of transmitting the same signal on each panel, and ii) a scheme (Scheme 2) of transmitting different signals on each panel. And Scheme 2 may be classified into a scheme (Scheme 2-1) in which each panel separately transmits a plurality of layers / ports constituting the same channel / RS resource, and a scheme (Scheme 2-2) in which each panel transmits different channel / RS resources.

[0228] Scheme 1 is a scheme in which the DL SFN (single frequency network) transmission scheme of an improved wireless communication system is applied to uplink multi-panel transmission, and UL reliability and / or coverage can be improved. Here, the DL SFN scheme means a scheme in which a plurality of TRPs transmit the same DL signal using the same time / frequency resource. That is, each terminal panel for uplink transmission in Scheme 1 may correspond to each TRP in the DL SFN scheme.

[0229] UL capacity / coverage / data rate / efficiency can be improved by Scheme 2. Scheme 2-1 is a scheme in which M-TRP NCJT transmission is applied to uplink transmission based on multiple panels. Scheme 2-2 is a scheme in which each panel transmits different signals using the same time / frequency resource (for example, one panel transmits PUCCH and another panel transmits SRS).

[0230] There is a difference between Scheme 1 and Scheme 2-1 in that Scheme 1 is the same layer / port transmission and Scheme 2-1 is different layer / port transmissions. However, Scheme 1 and Scheme 2-1 may be the same / similar from the perspective of the resource allocation method for channel / RS resources.

[0231] In the present disclosure, a method for determining / setting a scheme for PUSCH scheduled by DCI format 0_0 (or fallback DCI format) will be described.

[0232] FIG. 8 is a diagram for explaining the uplink transmission operation of a terminal in a wireless communication system to which the present disclosure is applicable.

[0233] The terminal can receive first setting information related to simultaneous uplink transmission based on multiple spatial parameters from the base station (S810).

[0234] As an example, the first setting information may include information regarding whether simultaneous uplink transmission based on multiple spatial parameters is applied (or information regarding whether STxMP is transmitted and / or whether single panel transmission is applied, etc.).

[0235] As an example, the first setting information may include information set for the simultaneous uplink transmission method based on multiple spatial parameters. The simultaneous uplink transmission method may be classified into, for example, i) a method of transmitting the same signal on each panel (Method 1), and ii) a method of transmitting different signals on each panel (Method 2).

[0236] As yet another example, the first setting information may include spatial parameter related setting information for the uplink transmission of the terminal (for example, panel / beam, etc.).

[0237] As an example, the spatial parameter related setting information may include at least one of integrated TCI state related information, TCI state information set for CORESET, spatial relationship information / TCI state information set for PUCCH resources, or PDSCH related TCI state information.

[0238] Here, the PDSCH related TCI state information may include TCI state information set for at least one code point of the TCI state set for the PDSCH.

[0239] The terminal can receive downlink control information (DCI) format 0_0 for scheduling the physical uplink shared channel (PUSCH) from the base station (S820).

[0240] Here, the DCI may include indication information (e.g., "enabler", etc.) indicating whether multi-spatial parameter-based simultaneous uplink transmission is enabled or not.

[0241] As an example, based on the indication information indicating the activation of multi-spatial parameter-based simultaneous uplink transmission, the terminal can transmit the PUSCH to the base station based on the multi-spatial parameters.

[0242] As yet another example, based on the indication information indicating the deactivation of multi-spatial parameter-based simultaneous uplink transmission, the terminal can transmit the PUSCH to the base station based on a single spatial parameter among the multi-spatial parameters.

[0243] The terminal can transmit the PUSCH to the base station based on either i) a single spatial parameter or ii) multi-spatial parameters among the multi-spatial parameters (S830).

[0244] Here, at least one port of the PUSCH (e.g., the antenna port / DMRS port of the PUSCH, etc.) may correspond to the multi-spatial parameters. That is, at least one port of the PUSCH may be corresponding / linked to the multi-spatial parameters (e.g., the source RS indicated by the UL TCI state or the source RS based on the spatial relationship information).

[0245] Specifically, the fact that PUSCH is transmitted based on multiple panels (i.e., multiple spatial parameters) can mean that the terminal transmits PUSCH in the SFN (single frequency network) STxMP mode. Also, the PUSCH may be transmitted to the base station on the same layer / port based on the multiple spatial parameters.

[0246] As an example, based on the fact that the multiple spatial parameters are indicated by the integrated TCI state (i.e., based on the fact that multiple RSs are configured by the integrated TCI state), the terminal can transmit the PUSCH to the base station based on a single spatial parameter among the multiple spatial parameters. That is, the terminal can transmit the PUSCH to the base station using a single RS among the multiple RSs having a QCL relationship by the integrated TCI state.

[0247] As another example, based on the fact that the multiple spatial parameters are indicated by the integrated TCI state, the terminal can transmit the PUSCH to the base station based on the multiple spatial parameters. Specifically, the terminal can transmit the PUSCH to the base station using multiple RSs having a QCL relationship by the integrated TCI state. That is, the terminal can transmit the PUSCH in the STxMP mode based on the multiple RSs.

[0248] As yet another example, the multiple spatial parameters may include a spatial relation reference signal (RS) or a multiple TCI state set for the PUCCH having the lowest ID among at least one PUCCH resource.

[0249] As an example, the terminal can transmit the PUSCH to the base station based on a single spatial relation RS or a single TCI state among the spatial relation RS or the multiple TCI state set for the PUCCH resource having the lowest ID.

[0250] As another example, the terminal can transmit the PUSCH to the base station based on the multiplexed spatial relation RS or the multiplexed TCI state set for the PUCCH resource having the lowest ID.

[0251] As yet another example, the terminal can transmit the PUSCH to the base station based on the spatial relation RS or the TCI state set for the PUCCH resource having the lowest ID among at least one PUCCH resource for which a single spatial relation RS or a single TCI state is set.

[0252] As yet another example, based on receiving second configuration information (e.g., "enableDefaultBeamPL-ForPUSCH0-0") related to the default beam for the PUSCH from the base station, the multiplexed spatial parameters may include i) the multiplexed TCI state set for the CORESET having the lowest ID among at least one CORESET, or ii) the multiplexed RS (e.g., QCL type-D RS) corresponding to the code point having the lowest ID among the code points of the TCI state set for the PDSCH.

[0253] As an example, the terminal can transmit the PUSCH to the base station based on a single TCI state among the multiplexed TCI states set for the CORESET having the lowest ID or a single RS among the multiplexed RS (e.g., QCL type-D RS) corresponding to the code point having the lowest ID.

[0254] As another example, the terminal can transmit the PUSCH to the base station based on the multiplexed TCI state set for the CORESET having the lowest ID or the multiplexed RS (e.g., QCL type-D RS) corresponding to the code point having the lowest ID.

[0255] As yet another example, based on the fact that the number of multiple TCI states set for the CORESET with the lowest ID or the number of multiple RSs corresponding to the code point with the lowest ID exceeds M, the terminal can transmit PUSCH to the base station based on N (where N is a natural number less than M) TCI states out of the multiple TCI states set for the CORESET with the lowest ID or N RSs out of the multiple RSs (e.g., QCL type-D RS) corresponding to the code point with the lowest ID.

[0256] At this time, M may be a predefined value or a value reported by the terminal (based on UE capability information).

[0257] As yet another example, the terminal can transmit PUSCH to the base station based on the RS (e.g., QCL type-D RS) corresponding to the CORESET with the lowest ID among at least one CORESET with a single TCI state set or the code point with the lowest ID among at least one code point indicating a single RS (e.g., QCL type-D RS).

[0258] FIG. 9 is a diagram for explaining the uplink reception operation of a base station in a wireless communication system to which the present disclosure is applicable.

[0259] The base station can transmit first configuration information related to simultaneous uplink transmission based on multiple spatial parameters to the terminal (S910).

[0260] The base station can transmit DCI format 0_0 for scheduling PUSCH to the terminal (S920).

[0261] The base station can receive PUSCH from the terminal based on i) a single spatial parameter among multiple spatial parameters or ii) multiple spatial parameters. At this time, based on receiving PUSCH from the terminal based on multiple spatial parameters, the PUSCH may be transmitted to the base station on the same layer and port.

[0262] The PUSCH transmission mode based on the first configuration information, DCI format 0_0, and the multiple spatial parameter or / and single spatial parameter has been described with reference to FIG. 8, so duplicate descriptions are omitted.

[0263] Hereinafter, a method for determining / setting the transmission mode of the PUSCH scheduled by DCI format 0_0 will be described more specifically.

[0264] Except when the unified TCI state is applied, when the PUSCH is scheduled by DCI format 0_0, the PUSCH may be transmitted in a single layer without an SRI (SRS resource indicator) / TPMI (Transmitted precoding matrix indicator) / TRI field.

[0265] The above-described PUSCH transmission mode is a transmission mode defined for minimizing the DCI payload and performing fallback transmission in an environment where link adaptation is not well performed (for example, at the initial connection, TPMI / TRI / beam information error situation, etc.).

[0266] The beam-related setting methods for the PUSCH scheduled by DCI format 0_0 can be distinguished into: i) a method based on the spatial relationship of the lowest ID PUCCH resource, ii) a method that uses the TCI state when the default spatial relationship / PL RS is applied, and iii) a method that uses the unified TCI state.

[0267] Hereinafter, when there is an STxMP transmission-related setting / indication, a method for transmitting the PUSCH scheduled by DCI format 0_0 according to the above-described method will be described.

[0268] Example 1

[0269] Embodiment 1 relates to a method of transmitting a PUSCH scheduled by DCI format 0_0 based on an integrated TCI state. The RS indicated by the integrated TCI state may be applied to the UL beam regardless of the DCI format.

[0270] In an improved wireless communication system, a single TCI state may be indicated / used, but may be extended to multiple TCI states to support STxMP transmission. That is, multiple integrated TCI states may be indicated by MAC-CE and / or DCI.

[0271] The integrated TCI state is used to indicate a beam common to the target channel / RS applied to a specific state. Therefore, the integrated TCI state may be applied to PUSCH transmission regardless of the DCI format. However, for a PUSCH scheduled by DCI format 0_0 in a basic wireless communication system, there may be applicable method constraints (for example, multi-layer transmission is not possible).

[0272] Accordingly, the PUSCH scheduled by DCI format 0_0 may be set / indicated / defined to always be transmitted with a single beam / panel (Embodiment 1-1). That is, when multiple TCI states are indicated, only one of the multiple TCI states may be applied to PUSCH transmission.

[0273] As another example, the PUSCH scheduled by DCI format 0_0 also applies multiple TCI states and is transmitted with multiple beams / panels, but only STxMP method 1 (that is, a method of transmitting the same signal on each panel) may be applied (regardless of the PUSCH scheduled by other DCI formats or STxMP applied to other UL channels / RS) (Embodiment 1-2).

[0274] In Embodiment 1-1 and Embodiment 1-2, stable transmission can be achieved by applying single panel transmission or STxMP scheme 1 according to the utilization purpose of DCI format 0_0 (for example, for the purpose of coping with the absence or error status of beam / panel / precoder / link adaptation information, etc.).

[0275] In Embodiment 1-1 and Embodiment 1-2, not only the PUSCH scheduled by DCI format 0_0, but also among the channels / RSs to which the integrated TCI state is applied, it may be applied to the channels (for example, PUCCH) / RSs that must guarantee stable performance or must be transmitted on a single port.

[0276] Example 2

[0277] Embodiment 2 relates to a method of transmitting PUCCH according to the spatial relation of the lowest ID PUCCH resource.

[0278] For STxMP transmission for PUCCH, when multiple spatial relation RS / TCI states are set for (some) PUCCH resources, a method of setting the beam of the PUSCH based on DCI format 0_0 transmitted in conjunction with the PUCCH spatial relation will be described.

[0279] The PUSCH scheduled by DCI format 0_0 may be transmitted with a single beam / panel (Embodiment 2-1). That is, when multiple TCI states are indicated, only one of the multiple TCI states may be applied to PUSCH transmission.

[0280] As an example, only a specific one of the multiple TCI states (for example, the first TCI state, etc.) set for the lowest ID PUCCH resource may be applied to PUSCH transmission (Embodiment 2-1a).

[0281] As another example, the TCI state of the lowest ID PUCCH resource among the PUCCH resources with a single TCI state set may be applied to PUSCH transmission (Example 2-1b).

[0282] As yet another example, the PUSCH scheduled by DCI format 0_0 also applies multiple TCI states and is transmitted on multiple beams / panels. However, (regardless of the PUSCH scheduled by other DCI formats or the STxMP applied to other UL channels / RS), only STxMP method 1 (i.e., the method of transmitting the same signal on each panel) may be applied (Example 2-2).

[0283] As an example, another enabler for STxMP application for DCI format 0_0 may be defined / set. When STxMP is enabled, the multiple TCI states of the lowest ID PUCCH resource among the PUCCH resources with multiple TCI states set (i.e., the multiple TCI states set for the lowest ID PUCCH resource) may be set / instructed / defined to be applied to the beam / panel.

[0284] Example 3

[0285] Example 3 relates to a method of transmitting a PUSCH scheduled by DCI format 0_0 when the default spatial relationship / PL RS is applied (i.e., when the setting information related to the default beam (e.g., "enableDefaultBeamPL-ForPUSCH0-0" is set)).

[0286] When the default spatial relationship / PL RS is applied, the terminal can automatically set the QCL type-D RS of the code point of the TCI state of the lowest ID CORESET or the lowest ID PUSCH TCI state as the spatial relationship and / or PL RS.

[0287] When multiple TCI states are configured for (part of) a CORESET for M-TRP transmission (e.g., M-TRP SFN transmission, etc.), or when multiple TCI states are configured for a single code point among the code points of PDSCH TCI states activated by MAC-CE for M-TRP PDSCH transmission, UL transmission may be performed by only one of the multiple TCI states (e.g., two TCI states).

[0288] However, since a terminal capable of STxMP transmission can use any of the multiple TCI states in the above-described cases, the examples described below may be applicable.

[0289] The PUSCH scheduled by DCI format 0_0 may be transmitted on a single beam / panel. That is, when multiple TCI states are indicated, only one of the multiple TCI states may be applied (Example 3-1).

[0290] As an example, only a specific one of the multiple TCI states (e.g., the first TCI state) set for the resource serving as the reference for the default spatial relation / PL RS (e.g., the lowest ID CORESET resource or the code point of the lowest ID PDSCH TCI state among the multiple TCI states set for the code point) may be applied (Example 3-1a).

[0291] As another example, the resource serving as the reference for the default spatial relation / PL RS can be redefined / changed as a resource having a single TCI state (or a single TCI state is configured) (Example 3-1b).

[0292] For example, the resource serving as the reference for the default spatial relation / PL RS can be redefined / changed to the RS (or, TCI state) corresponding to the lowest ID CORESET among the CORESETs having a single TCI state configured (or, having a single TCI state) and / or the code point of the lowest ID PDSCH TCI state among the code points having a single TCI state configured.

[0293] The PUSCH scheduled in DCI format 0_0 also transmits on multiple beams / panels by applying multiple TCI states. However, (regardless of the PUSCH scheduled in other DCI formats or the STxMP applied to other UL channels / RS), only STxMP mode 1 (i.e., the mode of transmitting the same signal on each panel) may be applied (Example 3-2).

[0294] For example, another enabler for STxMP application may be defined / set for DCI format 0_0. When STxMP is enabled, the multiple TCI states of the lowest ID CORESET resource among the CORESET resources with multiple TCI states set may be applied to multiple beams / panels, or the multiple TCI states of the lowest ID PDSCH TCI code point among the PDSCH TCI code points with multiple TCI states set may be set / defined to be applied to multiple beams / panels.

[0295] In the above examples, it may occur that the number of transmitable TRPs exceeds the number of simultaneous transmission panels of the terminal. For example, the number of transmitable TRPs may be 3, but the number of simultaneous transmission panels of the terminal may be 2.

[0296] For example, the number of TCI states set / indicated for a specific PDCCH / PDSCH transmission exceeds 2, but the terminal may be able to simultaneously transmit to a maximum of 2 panels. At this time, Example 3-3 based on Example 3-1 and Example 3-2 may be applied.

[0297] Specifically, when the maximum number M of resources serving as the reference for the default spatial relationship / PL RS (i.e., the lowest ID CORESET resource or the TCI state that can be set to the code point of the lowest ID PDSCH TCI state) exceeds the maximum number N applicable to the PUSCH scheduled by DCI format 0_0, only specific N TCI states may be selected and STxMP method 1 may be applied (Example 3-3).

[0298] Here, N is a fixed value (e.g., 2), but is not limited thereto. N may be reported according to the UE capability.

[0299] As an example, only specific N TCI states (e.g., the first N TCI states) among the M TCI states set for the resource serving as the reference for the default spatial relationship / PL RS may be applied (Example 3-3a).

[0300] As another example, the resource serving as the reference for the default spatial relationship / PL RS can be redefined / changed to a resource having N (or less) TCI states (Example 3-3b).

[0301] For example, the resource serving as the reference for the default spatial relationship / PL RS can be redefined as the lowest ID CORESET among the CORESETs having N (or less) TCI states (i.e., the CORESET with N (or less) TCI states set), or the TCI state of the lowest ID PDSCH TCI code point among the code points with N (or less) TCI states set.

[0302] In addition to the above-described examples, the base station can transmit, in an RRC message, configuration information related to whether STxMP transmission is applied to the PUSCH scheduled by DCI format 0_0 and / or whether single panel transmission is applied to the terminal.

[0303] As an addition or alternative, the presence or absence of STxMP transmission application for PUSCH and / or the presence or absence of single panel transmission application may be indicated by a specific field of the DCI (e.g., using a new field or a reserved code point of an existing field).

[0304] FIG. 10 is a diagram for explaining the signaling procedures between the network side and the terminal according to an embodiment of the present disclosure.

[0305] FIG. 10 shows an example of signaling between the network side and the UE (User Equipment) in an M-TRP situation where the above-described example (e.g., Example 1, Example 2, Example 3, or a combination of one or more of their detailed examples) of the present disclosure can be applied.

[0306] Here, the UE / network side is exemplary and may be applied by replacing it with various devices as described with reference to FIG. 11. FIG. 10 is for convenience of explanation and does not limit the scope of the present disclosure. Also, some steps shown in FIG. 10 may be omitted depending on the situation and / or settings, etc. Further, in the operations of the network side / UE in FIG. 10, the above-described uplink transmission / reception operations, M-TRP related operations, etc. may be referred to or utilized.

[0307] In the following description, the network side may be one base station including a plurality of TRPs, or may be one cell including a plurality of TRPs. Alternatively, the network side may include a plurality of RRHs (Remote Radio Heads) / RRUs (Remote Radio Units).

[0308] As an example, an ideal / non-ideal backhaul may be set between TRP1 and TRP2 constituting the network side. Also, the following description is based on a plurality of TRPs, but this may be equally extended and applied to transmission via a plurality of panels / cells, and may also be extended and applied to transmission via a plurality of RRHs / RRUs, etc.

[0309] Also, in the following description, the explanation is given based on "TRP". As described above, "TRP" may be applied in place of expressions such as panel, antenna array, cell (e.g., macro cell / small cell / pico cell, etc.), TP (transmission point), base station (gNB, etc.). As described above, the TRP may be classified by information (e.g., CORESET index, ID) regarding the CORESET group (or CORESET pool).

[0310] As an example, when one terminal is set to perform transmission and reception with a plurality of TRPs (or cells), this can mean that a plurality of CORESET groups (or CORESET pools) are set for one terminal. The setting for such a CORESET group (or CORESET pool) may be performed by upper layer signaling (e.g., RRC signaling, etc.).

[0311] Also, the base station may be a general term for an object that performs data transmission and reception with the terminal. For example, the base station may be a concept including one or more TPs (Transmission Points), one or more TRPs (Transmission and Reception Points), etc. Also, the TP and / or TRP may include a panel of the base station, a transmission and reception unit, etc.

[0312] In the following, it is assumed that the terminal and the network side (or base station) support a plurality of panel-based transmissions / receptions.

[0313] The terminal can receive configuration information from the network side via and / or using TRP1 and / or TRP2 (S105). Further, the panel can mean a unit composed of at least one antenna, antenna port, beam, uplink / downlink RS / channel resource of the terminal.

[0314] As an example, the uplink transmission panel may be identified based on the source RS (e.g., TCI state, spatial relationship) for the uplink channel / RS. Also, the uplink / downlink transmission panel may be identified by a unit having a specific UL / DL resource set / group (ID) or a specific (panel-related) ID as the source RS.

[0315] The terminal can send UE capability information to the network side (S105).

[0316] The UE capability information may include UE capability information related to the panel. For example, the UE capability information may include the maximum number of panels that can be set in the terminal, the maximum number of panels that the terminal can activate simultaneously, information on whether uplink multi-panel simultaneous transmission can be performed (for a specific UL channel / RS), and simultaneous transmission scheme information (e.g., whether the above-mentioned STxMP scheme 1 / 2-1 / 2-2 is supported) supported (for a specific UL channel / RS), etc.

[0317] The terminal can report UE capability information related to the above-described embodiments (e.g., Embodiment 1, Embodiment 2, Embodiment 3, or a combination of one or more of their detailed exemplifications) to the network side. As an example, the terminal can report to the network side, as UE capability information, whether to apply multiple beams / panels (for the PUSCH scheduled by DCI format 0_0), etc.

[0318] For example, the operation in which the terminal (100 or 200 in FIG. 11) in the above-described step S105 transmits UE capability information to the network side (200 or 100 in FIG. 11) may be implemented by the device in FIG. 11 described below. For example, referring to FIG. 11, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104 to receive the UE capability information, and one or more transceivers 106 can receive the UE capability information from the network side.

[0319] The terminal can receive configuration information from the network side (S110).

[0320] For example, the configuration information may include information related to the configuration of the network side (i.e., TRP configuration), resource allocation information related to M-TRP-based transmission and reception, etc. The configuration information may be transmitted via a higher layer (e.g., RRC, MAC CE). The configuration information may include information related to uplink transmission based on a configured grant (CG). Also, when the configuration information is predefined or set, this step may be omitted.

[0321] As yet another example, the configuration information may include panel-related configuration information for the terminal's uplink transmission. As an example, the panel-related configuration information may include information for uplink transmission (e.g., PUCCH, PUSCH, SRS, PRACH, etc.).

[0322] As yet another example, the configuration information is configuration information related to the above-described embodiments (e.g., embodiments 1, 2, 3, or one or more combinations of their detailed examples), and may include information related to single-beam / panel application transmission or multi-beam / panel application transmission (e.g., for PUSCH scheduled by DCI format 0_0).

[0323] As an addition or alternative, the configuration information may include information for configuring an STxMP scheme (applied to PUSCH, SRS, etc.) based on the UE capability information in (S105).

[0324] The configuration information may be configured for the terminal by at least one of an RRC message, a MAC-CE message, or a DCI. The configuration information may be configured in the form of an existing IE (information element) and / or a field (e.g., an SRI field, etc.), or may be configured in the form of a newly defined IE and / or a newly defined field, etc.

[0325] As an addition or alternative, the configuration information may include at least one of information related to a unified TCI, information related to a beam applied to PUCCH / PUSCH / SRS, or UL power control related information. Further, the configuration information may include at least one of CORESET related TCI state / QCL information, or PDSCH related TCI state / QCL configuration information.

[0326] As described in the above embodiments (e.g., one or more combinations of Embodiment 1, Embodiment 2, Embodiment 3, or their detailed illustrations), a plurality of TCI states may be configured for a CORESET, a plurality of TCI states may be configured for a PDSCH TCI code point, a plurality of TCI states / spatial relationships may be configured for a PUCCH resource, or a plurality of unified TCI states may be configured / indicated for the terminal.

[0327] For example, the operation of the UE (100 or 200 in FIG. 11) in step S110 described above receiving the setting information from the network side (200 or 100 in FIG. 11) may be implemented by the device in FIG. 11 described below. For example, referring to FIG. 11, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104, etc. to receive the setting information, and one or more transceivers 106 can receive the setting information from the network side.

[0328] The terminal can receive DCI (for example, DCI format 0_0) from the network side (S115). Here, the DCI may include information for scheduling the PUSCH.

[0329] For example, the operation of the UE (100 or 200 in FIG. 11) in step S115 described above receiving the DCI from the network side (200 or 100 in FIG. 11) may be implemented by the device in FIG. 11 described below. For example, referring to FIG. 11, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104, etc. to receive the DCI, and one or more transceivers 106 can receive the DCI from the network side.

[0330] The terminal can transmit the PUSCH to the network side based on the setting information and the DCI (S120).

[0331] The spatial relationship RS / TCI state applied to the PUSCH transmission may be determined by the spatial relationship RS / TCI state set for a specific PUCCH resource, the TCI state set for a specific CORESET resource, the TCI state set for the code point of a specific PDSCH TCI state, or the plurality of integrated TCI states indicated / activated according to the above-described embodiments (for example, Embodiment 1, Embodiment 2, Embodiment 3, or one or more combinations of their detailed examples).

[0332] As an addition or alternative, a scheme different from the transmission scheme applied to the PUSCH scheduled by another UL DCI format may be applied to the PUSCH transmission. As an addition or alternative, only single panel transmission or STxMP scheme 1 may be applied to the PUSCH transmission. For example, STxMP scheme 2-1 may be applied to DCI format 0_1 / 0_2, while STxMP scheme 1 may be applied to DCI format 0_0.

[0333] For example, the operation of the terminal (100 or 200 in FIG. 11) in the S120 stage described above transmitting a PUSCH to the network side (200 or 100 in FIG. 11) may be implemented by the apparatus in FIG. 11 described below. For example, referring to FIG. 11, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104 to transmit the PUSCH, and one or more transceivers 106 can transmit the PUSCH to the network side.

[0334] General Devices Applicable to the Present Disclosure

[0335] FIG. 11 illustrates a block diagram of a wireless communication device according to an embodiment of the present disclosure.

[0336] Referring to FIG. 11, the first device 100 and the second device 200 can transmit and receive wireless signals using various wireless connection technologies (e.g., LTE, NR).

[0337] The first device 100 includes 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 can control the memory 104 and / or the transceiver 106, and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure.

[0338] For example, after the processor 102 processes the information in the memory 104 to generate the first information / signal, it may transmit a radio signal including the first information / signal from the transceiver 106. Also, after the processor 102 receives a radio signal including the second information / signal from the transceiver 106, it can store the information obtained from the signal processing of the second information / signal in the memory 104.

[0339] The memory 104 may be connected to the processor 102 and can store various information related to the operation of the processor 102. For example, the memory 104 can store software code including instructions for performing part or all of a process controlled by the processor 102 or for executing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams 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 technologies (e.g., LTE, NR). The transceiver 106 may be connected to the processor 102 and can transmit and / or receive radio signals via one or more antennas 108. The transceiver 106 can include a transmitter and / or a receiver. The transceiver 106 may be alternatively referred to as an RF (Radio Frequency) unit. In the present invention, the device may mean a communication modem / circuit / chip.

[0340] The second device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 controls the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. For example, after processing the information in the memory 204 to generate third information / signals, the processor 202 may transmit a wireless signal including the third information / signals from the transceiver 206. Also, after receiving a wireless signal including fourth information / signals from the transceiver 206, the processor 202 can store the information obtained from the signal processing of the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and can store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for performing part or all of the processes controlled by the processor 202 or for executing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams 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 technologies (e.g., LTE, NR). The transceiver 206 may be connected to the processor 202 and can transmit and / or receive wireless signals via one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be alternatively referred to as an RF unit. In the present invention, the device may mean a communication modem / circuit / chip.

[0341] Hereinafter, the hardware elements of devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors 102 and 202. For example, one or more processors 102 and 202 can implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102 and 202 can generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) according to the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. One or more processors 102 and 202 can generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. One or more processors 102 and 202 can generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure, and provide it to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain a PDU, an SDU, a message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure.

[0342] One or more processors 102, 202 can be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors 102, 202 may be embodied by hardware, firmware, software, or a combination thereof. As 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 descriptions, functions, procedures, proposals, methods, and / or operational sequence diagrams disclosed in the present disclosure may be embodied using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, and the like. The firmware or software configured to execute the descriptions, functions, procedures, proposals, methods, and / or operational sequence diagrams disclosed in the present disclosure may be included in one or more processors 102, 202, stored in one or more memories 104, 204, and driven by one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or operational sequence diagrams disclosed in the present disclosure may be embodied by firmware or software in the form of code, instruction words, and / or a set of instruction words.

[0343] One or more memories 104, 204 may be coupled to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104, 204 may be constituted by ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. The one or more memories 104, 204 may be located inside and / or outside the one or more processors 102, 202. Also, the one or more memories 104, 204 may be coupled to the one or more processors 102, 202 by various techniques such as wired or wireless connections.

[0344] One or more transceivers 106, 206 can transmit user data, control information, radio signals / channels, etc. mentioned in the methods and / or operation sequence diagrams of the present disclosure to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams 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 can transmit and receive radio signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information or radio signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information or radio signals from one or more other devices. Also, 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 transmit and receive user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams disclosed in the present disclosure via one or more antennas 108, 208. In the present disclosure, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals in order to process received user data, control information, radio signals / channels, etc. using one or more processors 102, 202. One or more transceivers 106, 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102, 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 can include (analog) oscillators and / or filters.

[0345] The embodiments described above are those in which the components and features of the present disclosure are combined in a predetermined form. Each component or feature should be considered as optional unless specifically stated otherwise. Each component or feature may be implemented in a form that does not combine with other components or features. It is also possible to combine some components and / or features to form embodiments of the present disclosure. The order of operations described in the embodiments of the present disclosure may be changed. Some components or features of one embodiment may be included in other embodiments, or may be replaced with corresponding components or features of other embodiments. It is obvious that claims without an explicit citation relationship in the claims can be combined to form embodiments, or can be included as new claims by amendment after filing.

[0346] It is obvious to those skilled in the art that the present disclosure can be embodied in other specific forms without departing from the essential features of the present disclosure. Therefore, the above detailed description should not be construed as restrictive in any way and should be considered as exemplary. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and any changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure.

[0347] The scope of the present disclosure includes software or machine-executable instructions (e.g., operating regimes, applications, firmware, programs, etc.) that cause a device or computer to perform operations according to the methods of various embodiments, and non-transitory computer-readable media on which such software or instructions are stored and executable on a device or computer. Instructions that can be used to program a processing system to perform the features described in the present disclosure may be stored on / within a storage medium or computer-readable storage medium, and the features described in the present disclosure may be implemented using a computer program product that includes such a storage medium. The storage medium can include, but is not limited to, high-speed random access memory such as DRAM, SRAM, DDR RAM, or other random access solid-state memory devices, and can 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 can optionally include one or more storage devices located remotely from the processor. The memory or, alternatively, the non-volatile memory device within the memory includes a non-transitory computer-readable storage medium. The features described in the present disclosure may be stored on any one of the machine-readable media, control the hardware of the processing system, and be integrated into software and / or firmware that enables the processing system to interact with other mechanisms that utilize the results according to the embodiments of the present disclosure. Such software or firmware can include, but is not limited to, application code, device drivers, operating regimes, and execution environments / containers.

[0348] Here, the wireless communication technology implemented in the devices 100 and 200 of the present disclosure can include, in addition to LTE, NR, and 6G, Narrowband Internet of Things (NB-IoT) for low-power communication. At this time, for example, the NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-mentioned names. Additionally or alternatively, the wireless communication technology implemented in the devices 100 and 200 of the present disclosure can communicate based on LTE-M technology. At this time, as an example, the LTE-M technology may be an example of LPWAN technology and may be called by various names such as eMTC (enhanced Machine Type Communication). For example, the LTE-M technology may be implemented by at least any one of various standards such as 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, and is not limited to the above-mentioned names. Additionally or alternatively, the wireless communication technology implemented in the devices 100 and 200 of the present disclosure can include at least any one of ZigBee (registered trademark), Bluetooth (registered trademark), and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-mentioned names. As an example, the ZigBee technology can generate PAN (personal area networks) related to small / low-power digital communication based on various standards such as IEEE 802.15.4 and may be called by various names.

Industrial Applicability

[0349] Although the method proposed in this disclosure has been mainly described with examples applicable to 3GPP LTE / LTE-A and 5G systems, it is applicable to various wireless communication systems in addition to 3GPP LTE / LTE-A and 5G systems.

Claims

1. A step in which a UE (user equipment) receives DCI (downlink control information) format 0_0 from a base station, and a step in which the UE transmits a PUSCH (physical uplink shared channel) to the base station based on the DCI format 0_0, the method comprising: Based on a plurality of TCI (transmission configuration indicator) states being set for the UE by a first upper layer parameter, the PUSCH is transmitted to the base station based on a first spatial parameter related to a first TCI state among the plurality of TCI states; Based on a second upper layer parameter related to a default beam for the PUSCH being set to active and the plurality of TCI states being set for the UE by the first upper layer parameter, the PUSCH is transmitted to the base station based on a first spatial parameter related to a first TCI state among the plurality of TCI states set for a CORESET (control resource set) having the lowest ID among at least one CORESET; Based on at least one PUCCH (physical uplink control channel) resource being set for the UE by a third upper layer parameter, the PUSCH is transmitted to the base station based on a first spatial relationship among a plurality of spatial relationships set for a first PUSCH having the lowest ID (index) among the at least one PUCCH resource.

2. Based on the number of the plurality of TCI states set for the CORESET having the lowest ID exceeding M, the PUSCH is transmitted to the base station based on N (N is a natural number less than M) TCI states among the plurality of TCI states set for the CORESET having the lowest ID, according to the method of Claim 1.

3. The method according to Claim 2, wherein the N is predefined or transmitted to the base station by UE capability information.

4. The DCI includes indication information indicating whether to activate simultaneous uplink transmission based on a multi-spatial parameter. Based on the activation of the simultaneous uplink transmission based on the multiplexed spatial parameters being indicated by the indication information, the PUSCH is transmitted to the base station based on the multiplexed spatial parameters, according to the method of claim 1.

5. Based on the deactivation of the simultaneous uplink transmission based on the multiplexed spatial parameters being indicated by the indication information, the PUSCH is transmitted to the base station based on the first TCI state among the plurality of TCI states, according to the method of claim 4.

6. A UE (user equipment), at least one transceiver; at least one processor coupled to the at least one transceiver, wherein the at least one processor receives DCI (downlink control information) format 0_0 from a base station via the at least one transceiver, is configured to transmit a PUSCH (physical uplink shared channel) to the base station via the at least one transceiver based on the DCI format 0_0, based on a plurality of TCI (transmission configuration indicator) states being set for the UE by a first upper layer parameter, the PUSCH is transmitted to the base station based on a first spatial parameter related to a first TCI state among the plurality of TCI states, based on a second upper layer parameter related to a default beam for the PUSCH being set to active and the plurality of TCI states being set for the UE by the first upper layer parameter, the PUSCH is transmitted to the base station based on a first spatial parameter related to a first TCI state among the plurality of TCI states set for a CORESET (control resource set) having the lowest ID among at least one CORESET. The PUSCH is transmitted to the base station based on a first spatial relationship among a plurality of spatial relationships set for a first PUSCH having the lowest ID (index) among the at least one PUCCH resource, based on the at least one PUCCH (physical uplink control channel) resource being set for the UE by a third upper layer parameter. UE. **Claim 7** A base station, at least one transceiver; at least one processor coupled to the at least one transceiver, wherein the at least one processor is configured to transmit DCI (downlink control information) format 0_0 to the UE via the at least one transceiver, configured to receive a PUSCH (physical uplink shared channel) from the UE via the at least one transceiver based on the DCI format 0_0, the PUSCH is transmitted to the base station based on a first spatial parameter associated with a first TCI state among the plurality of TCI (transmission configuration indicator) states, based on the plurality of TCI states being set for the UE by a first upper layer parameter; a second upper layer parameter associated with a default beam for the PUSCH is set to active, and based on the plurality of TCI states being set for the UE by the first upper layer parameter, the PUSCH is transmitted to the base station based on a first spatial parameter associated with a first TCI state among the plurality of TCI states set for a CORESET having the lowest ID among at least one CORESET; The base station, wherein the PUSCH is transmitted to the base station based on a first spatial relationship among a plurality of spatial relationships set for a first PUSCH having the lowest ID (index) among the at least one PUCCH resource, based on the at least one PUCCH (physical uplink control channel) resource being set for the UE by a third upper layer parameter.

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