Method and device for performing uplink transmission and reception in wireless communication system

Abstract

A method and a device for performing uplink transmission and reception in a wireless communication system are disclosed. A method performed by a terminal in a wireless communication system according to an embodiment of the present disclosure may comprise the steps of: reporting, to a base station, capability information associated with full power transmission; receiving, from the base station, control information including information on at least one precoding matrix for a data channel; and transmitting, to the base station, the data channel on the basis of the at least one precoding matrix. Here, the capability information may include information about a first precoding matrix set and information about a second precoding matrix set for full power transmission of the data channel. At this time, the first precoding matrix set may be associated with a first uplink transmission scheme based on one sounding reference signal (SRS) resource set, and the second precoding matrix set may be associated with a second uplink transmission scheme based on at least two SRS resource sets.

Description

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

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

[0002] Mobile communication systems were developed to provide voice services while ensuring user activity. However, they have expanded beyond voice to include data services. Currently, explosive growth in traffic is leading to resource shortages and users' demand for higher-speed services, necessitating a more advanced mobile communication system.

[0003] Next-generation mobile communication systems must support explosive data traffic growth, dramatically increasing data rates per user, a vastly increased number of connected devices, ultra-low end-to-end latency, and high energy efficiency. To achieve these goals, various technologies are being studied, including dual connectivity, massive multiple input multiple output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, and device networking.

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

[0005] The technical problem of the present disclosure is to provide a method and device for indicating a PMI (precoding matrix indicator) for uplink transmission and applying a full power Tx mode related thereto for a terminal supporting a method in which M panels share N ports (e.g., digital ports).

[0006] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0007] According to one aspect of the present disclosure, a method performed by a terminal in a wireless communication system may include: reporting capability information related to full power transmission to a base station; receiving control information from the base station, the control information including information on at least one precoding matrix for a data channel; and transmitting the data channel to the base station based on the at least one precoding matrix. Here, the capability information may include information on a first precoding matrix set for full power transmission of the data channel and information on a second precoding matrix set. Here, the first precoding matrix set may be related to a first uplink transmission scheme based on one sounding reference signal (SRS) resource set, and the second precoding matrix set may be related to a second uplink transmission scheme based on at least two SRS resource sets.

[0008] In accordance with an additional aspect of the present disclosure, a method performed by a base station in a wireless communication system may include: receiving, from a terminal, a report of capability information related to full power transmission; transmitting, to the terminal, control information including information on at least one precoding matrix for a data channel; and receiving, from the terminal, the data channel transmitted based on the at least one precoding matrix. Here, the capability information may include information on a first precoding matrix set for full power transmission of the data channel and information on a second precoding matrix set. Here, the first precoding matrix set may be associated with a first uplink transmission scheme based on one sounding reference signal (SRS) resource set, and the second precoding matrix set may be associated with a second uplink transmission scheme based on at least two SRS resource sets.

[0009] According to an embodiment of the present disclosure, a method and device for performing uplink transmission and reception in a wireless communication system can be provided.

[0010] According to an embodiment of the present disclosure, a method and device for indicating a precoding matrix indicator (PMI) for uplink transmission and applying a full power Tx mode related thereto may be provided for a terminal supporting a method in which M panels share N ports (e.g., digital ports).

[0011] According to an embodiment of the present disclosure, in a simultaneous transmission across multi-panel (STxMP) implementation dividing a total of N ports, there is a technical effect of simplifying port-to-panel mapping by limiting a set of PMIs per panel and minimizing performance reduction due to PMI limitation by introducing additional PMIs.

[0012] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description below.

[0013] The accompanying drawings, which are incorporated in and are part of the detailed description to aid in understanding the present disclosure, provide embodiments of the present disclosure and, together with the detailed description, describe the technical features of the present disclosure.

[0014] Figure 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0015] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0016] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0017] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied.

[0018] FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.

[0019] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the same.

[0020] FIG. 7 illustrates a multi-TRP (Transmission and Reception Point) transmission method in a wireless communication system to which the present disclosure can be applied.

[0021] Figure 8 illustrates a structure for sharing ports between panels to which the present disclosure can be applied.

[0022] FIG. 9 is a diagram illustrating the operation of a terminal for a method of performing uplink transmission according to an embodiment of the present disclosure.

[0023] FIG. 10 is a diagram illustrating the operation of a base station for a method of receiving uplink transmission according to an embodiment of the present disclosure.

[0024] FIG. 11 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0025] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description set forth below, together with the accompanying drawings, is intended to explain exemplary embodiments of the present disclosure and is not intended to represent the only embodiments in which the present disclosure may be practiced. The following detailed description includes specific details to provide a thorough understanding of the present disclosure. However, one of ordinary skill in the art will appreciate that the present disclosure may be practiced without these specific details.

[0026] In some cases, to avoid obscuring the concepts of the present disclosure, known structures and devices may be omitted or illustrated in block diagram form focusing on the core functions of each structure and device.

[0027] In the present disclosure, when a component is said to be "connected," "coupled," or "connected" to another component, this may include not only a direct connection but also an indirect connection in which another component exists between them. Furthermore, the terms "comprises" or "has" in the present disclosure specify the presence of the mentioned features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0028] In this disclosure, terms such as “first,” “second,” etc. are used only to distinguish one component from another and are not used to limit the components, and do not limit the order or importance between the components unless specifically stated otherwise. Accordingly, within the scope of this disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment.

[0029] The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the scope of the claims. As used in the description of the embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. The term "and / or" as used herein may refer to any one of the associated enumerated items, or is meant to refer to and encompass any and all possible combinations of two or more of them. Furthermore, the use of " / " between words in this disclosure has the same meaning as "and / or" unless otherwise stated.

[0030] The present disclosure describes a wireless communication network or a wireless communication system, and an operation performed in a wireless communication network may be performed in a process of controlling the network and transmitting or receiving a signal from a device (e.g., a base station) that manages the wireless communication network, or may be performed in a process of transmitting or receiving a signal to or between terminals connected to the wireless network.

[0031] In the present disclosure, transmitting or receiving a channel means transmitting or receiving information or a signal through the channel. For example, transmitting a control channel means transmitting control information or a signal through the control channel. Similarly, transmitting a data channel means transmitting data information or a signal through the data channel.

[0032] Hereinafter, downlink (DL) refers to communication from a base station to a terminal, and uplink (UL) refers to communication from a terminal to a base station. In downlink, a transmitter may be part of a base station, and a receiver may be part of a terminal. In uplink, a transmitter may be part of a terminal, and a receiver may be part of a base station. A base station may be expressed as a first communication device, and a terminal may be expressed as a second communication device. A base station (BS) may be replaced by terms such as a 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.In addition, the terminal may be fixed or mobile, and may be replaced with 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, UAV (Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.

[0033] The following technologies can be used in various wireless access systems, such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA can be implemented using wireless technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented using wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a 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.

[0034] For clarity, the description is based on the 3GPP communication system (e.g., LTE-A, NR), but the technical idea of ​​the present disclosure is not limited thereto. LTE refers to technology after 3GPP TS (Technical Specification) 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR may be referred to as a 3GPP system. "xxx" refers to a standard document detail number. LTE / NR may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present disclosure, reference may be made to matters described in standard documents published prior to the present disclosure. For example, reference may be made to the following documents.

[0035] For 3GPP LTE, see 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), and TS 36.331 (Radio resource control).

[0036] For 3GPP NR, see 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 (Overall description of NR and New Generation-Radio Access Network (NG-RAN)), and TS 38.331 (Radio Resource Control Protocol Specification).

[0037] Abbreviations for terms that may be used in this disclosure are defined as follows.

[0038] - BM: beam management

[0039] - CQI: Channel Quality Indicator

[0040] - CRI: Channel state information - reference signal resource indicator

[0041] - CSI: Channel State Information

[0042] - CSI-IM: Channel State Information - Interference Measurement

[0043] - CSI-RS: Channel state information - reference signal

[0044] - DMRS: Demodulation Reference Signal

[0045] - FDM: frequency division multiplexing

[0046] - FFT: fast Fourier transform

[0047] - IFDMA: interleaved frequency division multiple access

[0048] - IFFT: inverse fast Fourier transform

[0049] - L1-RSRP: Layer 1 reference signal received power

[0050] - L1-RSRQ: Layer 1 reference signal received quality

[0051] - MAC: Medium Access Control

[0052] - NZP: non-zero power

[0053] - OFDM: orthogonal frequency division multiplexing

[0054] - PDCCH: Physical downlink control channel

[0055] - PDSCH: Physical downlink shared channel

[0056] - PMI: precoding matrix indicator

[0057] - RE: resource element

[0058] - RI: Rank indicator

[0059] - RRC: Radio Resource Control

[0060] - RSSI: Received signal strength indicator

[0061] - Rx: Reception

[0062] - QCL: quasi co-location

[0063] - SINR: signal to interference and noise ratio

[0064] - SSB (or SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH))

[0065] - TDM: Time Division Multiplexing

[0066] - TRP: transmission and reception point

[0067] - TRS: Tracking Reference Signal

[0068] - Tx: transmission

[0069] - UE: user equipment

[0070] - ZP: Zero Power

[0071] System General

[0072] As more and more communication devices demand greater communication capacity, the need for improved mobile broadband communications compared to existing radio access technologies (RATs) is emerging. Furthermore, massive machine type communications (MTC), which connects numerous devices and objects to provide diverse services anytime, anywhere, is also a key issue to be considered in next-generation communications. Furthermore, communication system design that considers reliability and latency-sensitive services / terminals is being discussed. Accordingly, the introduction of next-generation RATs that consider enhanced mobile broadband communication (eMBB), massive MTC (MMTC), and ultra-reliable and low latency communication (URLLC) is being discussed. For convenience, these technologies are referred to as NR in this disclosure. NR is an expression representing an example of 5G RAT.

[0073] A new RAT system, including NR, uses OFDM or a similar transmission scheme. The new RAT system may follow OFDM parameters different from those of LTE. Alternatively, the new RAT system may follow the existing LTE / LTE-A numerology but support a larger system bandwidth (e.g., 100 MHz). Alternatively, a single cell may support multiple numerologies. That is, terminals operating under different numerologies can coexist within a single cell.

[0074] A numerology corresponds to a single subcarrier spacing in the frequency domain. Different numerologies can be defined by scaling the reference subcarrier spacing by an integer N.

[0075] Figure 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0076] Referring to Fig. 1, the NG-RAN consists of gNBs that provide NG-RA (NG-Radio Access) user plane (i.e., new AS (access stratum) sublayer / PDCP (packet data convergence protocol) / RLC (radio link control) / MAC / PHY) and control plane (RRC) protocol termination for UE. The gNBs are interconnected via Xn interfaces. 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.

[0077] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0078] NR systems can support multiple numerologies. Numerologies can be defined by subcarrier spacing and cyclic prefix (CP) overhead. Multiple subcarrier spacings can be derived by scaling the base (reference) subcarrier spacing by an integer N (or μ). Furthermore, even if it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the numerology used can be selected independently of the frequency band. Furthermore, NR systems can support various frame structures corresponding to multiple numerologies.

[0079] Below, we examine OFDM numerologies and frame structures that can be considered in NR systems. The various OFDM numerologies supported in NR systems can be defined as shown in Table 1 below.

[0080] μΔf=2 μ ·15 [kHz]CP015 Normal 130 Normal 260 Normal, Extended 3120 Normal 4240 Normal

[0081] NR supports multiple numerologies (or subcarrier spacing (SCS)) to support 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, lower latency, and wider carrier bandwidth, and when the SCS is 60 kHz or higher, it supports a bandwidth larger than 24.25 GHz to overcome phase noise. The NR frequency band is defined by two types of frequency ranges (FR1, FR2). FR1 and FR2 can be configured as shown in Table 2 below. In addition, FR2 can mean millimeter wave (mmW).

[0082] Frequency Range Designation Corresponding Frequency Range Subcarrier Spacing FR1410MHz - 7125MHz 15, 30, 60kHz FR224250MHz - 52600MHz 60, 120, 240kHz

[0083] Regarding the frame structure in the NR system, the sizes of the various fields in the time domain are T c =1 / (Δf max ·N f ) is expressed as a multiple of the time unit. Here, Δf max =480·10 3 Hz, and N f =4096. Downlink and uplink transmissions are T f =1 / (Δf max N f / 100)·T c = It is organized into radio frames with a duration of 10ms. Here, each radio frame is T sf =(Δf max N f / 1000)·T c = It consists of 10 subframes with a duration of 1ms. In this case, there may be one set of frames for uplink and one set of frames for downlink. In addition, transmission in uplink frame number i from a terminal is T earlier than the start of the corresponding downlink frame from the terminal. TA =(N TA +N TA,offset )T c It should start before. For the subcarrier spacing configuration μ, slots are n within a subframe. s μ ∈{0,..., N slot subframe,μ-1} are numbered in increasing order, and n within a radio frame. s,f μ ∈{0,..., N slot frame,μ -1} are numbered in increasing order. One slot is N symb slot It consists of consecutive OFDM symbols, and N symb slot is determined by CP. Slot n in subframe s μ The start of OFDM symbol n in the same subframe s μ N symb slotare aligned temporally with the start of the OFDM symbol. Not all terminals can transmit and receive simultaneously, which means that not all OFDM symbols in a downlink slot or uplink slot can be used. Table 3 shows the number of OFDM symbols per slot (N) in a general CP. symb slot ), the number of slots per wireless frame (N slot frame,μ ), number of slots per subframe (N slot subframe,μ), and Table 4 shows the number of OFDM symbols per slot in the extended CP, the number of slots per radio frame, and the number of slots per subframe.

[0084] μN symb slot N slot frame,μ N slot subframe,μ01410111420221440431480841416016

[0085] μN symb slot N slot frame,μ N slot subframe,μ212404

[0086] FIG. 2 is an example when μ=2 (SCS is 60 kHz), and referring to Table 3, 1 subframe can include 4 slots. 1 subframe={1,2,4} slots illustrated in FIG. 2 is an example, and the number of slot(s) that can be included in 1 subframe is defined as in Table 3 or Table 4. In addition, a mini-slot can include 2, 4, or 7 symbols, or more or fewer symbols. With respect to physical resources in an NR system, antenna ports, resource grids, resource elements, resource blocks, carrier parts, etc. can be considered. Hereinafter, the physical resources that can be considered in an NR system will be described in detail.

[0087] First, with respect to antenna ports, antenna ports are defined such that the channel through which a symbol on an antenna port is carried can be inferred from the channel through which another symbol on the same antenna port is carried. Two antenna ports are said to be in a QC / QCL (quasi co-located or quasi co-location) relationship if the large-scale properties of the channel through which a symbol on one antenna port is carried can be inferred from the channel through which a symbol on another antenna port is carried. Here, the large-scale properties include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0088] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0089] Referring to Figure 3, the resource grid is N in the frequency domain. RB μ N sc RB It consists of subcarriers, and one subframe is 14·2 μ It is described as an example, but not limited to, that it consists of OFDM symbols. In an NR system, the transmitted signal is N RB μ N sc RB One or more resource grids consisting of subcarriers and 2 μ N symb (μ) is described by OFDM symbols. Here, N RB μ ≤N RB max,μ is. The above N RB max,μ represents the maximum transmission bandwidth, which may vary between uplink and downlink as well as between numerologies. In this case, one resource grid may be configured for μ and antenna port p. Each element of the resource grid for μ and antenna port p is referred to as a resource element and is uniquely identified by an index pair (k, l'), where k=0,...,N. RB μ N sc RB -1 is the index in the frequency domain, and l'=0,...,2 μ N symb (μ) -1 indicates the position of the symbol within the subframe. When referring to a resource element in a slot, an index pair (k,l) is used. Here, l=0,...,N symb μ-1. The resource element (k,l') for μ and antenna port p is a complex value a k,l' (p,μ) . If there is no risk of confusion or if a particular antenna port or numerology is not specified, the indices p and μ can be dropped, resulting in a complex value of a k,l' (p) or a k,l' This can be. Also, a resource block (RB) is N in the frequency domain. sc RB =12 is defined as consecutive subcarriers.

[0090] Point A serves as a common reference point of the resource block grid and is obtained as follows.

[0091] - offsetToPointA for the Primary Cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping the SS / PBCH block used by the UE for initial cell selection. It is expressed in resource block units assuming 15 kHz subcarrier spacing for FR1 and 60 kHz subcarrier spacing for FR2.

[0092] - absoluteFrequencyPointA represents the frequency-position of point A expressed as ARFCN (absolute radio-frequency channel number).

[0093] Common resource blocks (CRBs) are numbered from 0 upwards in the frequency domain for a subcarrier spacing setting μ. The center of subcarrier 0 of CRB 0 for a subcarrier spacing setting μ coincides with 'point A'. Common resource block number n in the frequency domain CRB μ The relationship between the resource elements (k, l) and the subcarrier spacing setting μ is given by the following mathematical expression 1.

[0094]

[0095] In Equation 1, k is defined relative to point A such that k = 0 corresponds to the subcarrier centered at point A. Physical resource blocks are numbered from 0 to N within the bandwidth part (BWP). BWP,i size,μ -Numbered from -1, where i is the number of BWP. Physical resource block n in BWP i PRB and common resource block n CRB The relationship between them is given by the mathematical formula 2 below.

[0096]

[0097] N BWP,i start,μ is a common resource block where BWP starts relative to common resource block 0.

[0098] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied. FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.

[0099] Referring to FIGS. 4 and 5, a slot includes multiple symbols in the time domain. For example, in the case of a normal CP, one slot includes seven symbols, but in the case of an extended CP, one slot includes six symbols.

[0100] A carrier comprises multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined as multiple consecutive (physical) resource blocks in the frequency domain, and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can comprise up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal. Each element in the resource grid is referred to as a Resource Element (RE), to which one complex symbol can be mapped.

[0101] The NR system can support up to 400 MHz per component carrier (CC). If a terminal operating in 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, when considering multiple use cases operating within a single wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different numerologies (e.g., subcarrier spacing, etc.) may be supported for each frequency band within the CC. Alternatively, each terminal may have different maximum bandwidth capabilities. Considering this, the base station can instruct the terminal to operate only in a portion of the bandwidth of the wideband CC, rather than the entire bandwidth. This portion of bandwidth is conveniently defined as the bandwidth part (BWP). A BWP can be composed of consecutive RBs on the frequency axis and can correspond to a single numerology (e.g., subcarrier spacing, CP length, slot / mini-slot interval).

[0102] Meanwhile, the base station can configure multiple BWPs even within a single CC configured for a terminal. For example, in the PDCCH monitoring slot, a BWP occupying a relatively small frequency domain can be configured, and the PDSCH indicated by the PDCCH can be scheduled on a larger BWP. Alternatively, if UEs are concentrated in a specific BWP, some terminals can be configured to a different BWP for load balancing. Alternatively, considering frequency domain inter-cell interference cancellation between neighboring cells, a portion of the spectrum in the middle of the entire bandwidth can be excluded and both BWPs can be configured within the same slot. In other words, the base station can configure at least one DL / UL BWP for a terminal associated with a wideband CC. The base station can activate at least one DL / UL BWP(s) among the configured DL / UL BWP(s) at a specific time (via L1 signaling, MAC CE (Control Element), RRC signaling, etc.). Additionally, the base station can instruct switching to another configured DL / UL BWP (e.g., via L1 signaling or MAC CE or RRC signaling). Alternatively, switching to a configured DL / UL BWP can be performed based on a timer when the timer value expires. In this case, the activated DL / UL BWP is defined as the active DL / UL BWP. However, in situations such as when the terminal is performing the initial access process or before the RRC connection is set up, the configuration for the DL / UL BWP may not be received. Therefore, in these situations, the DL / UL BWP assumed by the terminal is defined as the initially active DL / UL BWP.

[0103] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the same.

[0104] In wireless communication systems, terminals receive information from a base station via the downlink and transmit it to the base station via the uplink. The information transmitted and received between the base station and terminals includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.

[0105] When the terminal is powered on or enters a new cell, it performs an initial cell search operation, such as synchronizing with the base station (S601). To this end, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization signal (PSS) from the base station to synchronize with the base station and obtain information such as a cell identifier (ID). Afterwards, the terminal can receive a physical broadcast channel (PBCH) from the base station to obtain broadcast information within the cell. Meanwhile, the terminal can receive a downlink reference signal (DL RS) during the initial cell search phase to check the downlink channel status.

[0106] A terminal that has completed initial cell search can obtain more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to information carried in the PDCCH (S602).

[0107] Meanwhile, when accessing a base station for the first time or when there are no radio resources for signal transmission, the terminal may perform a random access procedure (RACH) with the base station (steps S603 to S606). To this end, the terminal may transmit a specific sequence as a preamble via the physical random access channel (PRACH) (steps S603 and S605) and receive a response message to the preamble via the PDCCH and corresponding PDSCH (steps S604 and S606). In the case of contention-based RACH, a contention resolution procedure may additionally be performed.

[0108] The terminal that has performed the procedure described above 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) through the PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and its format varies depending on its intended use.

[0109] Meanwhile, the control information that the terminal transmits to the base station via the uplink or that the terminal receives 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 case of the 3GPP LTE system, the terminal can transmit the above-described control information such as CQI / PMI / RI via PUSCH and / or PUCCH.

[0110] Table 5 shows an example of the DCI format in the NR system.

[0111] DCI Format Utilization 0_0 Scheduling of PUSCH within a cell 0_1 Scheduling of one or multiple PUSCH within a cell, or indicating cell group (CG: cell group) downlink feedback information to the UE 0_2 Scheduling of PUSCH within a cell 1_0 Scheduling of PDSCH within a DL cell 1_1 Scheduling of PDSCH within a cell 1_2 Scheduling of PDSCH within a cell

[0112] Referring to Table 5, DCI formats 0_0, 0_1, and 0_2 may include resource information related to scheduling of PUSCH (e.g., UL / SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), 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.), multi-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. DCI format 0_0 is used for scheduling of PUSCH in one cell. Information included in DCI format 0_0 is transmitted with CRC (cyclic redundancy check) scrambled by C-RNTI (cell radio network temporary identifier, Cell RNTI), CS-RNTI (Configured Scheduling RNTI), or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI).

[0113] DCI format 0_1 ​​is used to indicate scheduling of one or more PUSCHs in a cell, or configure grant (CG) downlink feedback information to the UE. The information contained in DCI format 0_1 ​​is CRC-scrambled and transmitted using the C-RNTI, CS-RNTI, SP-CSI-RNTI (Semi-Persistent CSI RNTI), or MCS-C-RNTI.

[0114] DCI format 0_2 is used for scheduling PUSCH in a cell. The information contained in DCI format 0_2 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

[0115] Next, DCI formats 1_0, 1_1, and 1_2 may include resource information related to scheduling of PDSCH (e.g., frequency resource allocation, time resource allocation, virtual resource block (VRB)-physical resource block (PRB) mapping, etc.), transport block (TB) related information (e.g., MCS, NDI, RV, etc.), HARQ related information (e.g., process number, DAI, PDSCH-HARQ feedback timing, etc.), multi-antenna related information (e.g., antenna port, transmission configuration indicator (TCI), sounding reference signal (SRS) request, etc.), PUCCH related information (e.g., PUCCH power control, PUCCH resource indicator, etc.), and control information included in each DCI format may be predefined.

[0116] DCI format 1_0 is used for scheduling PDSCH in a DL cell. The information contained in DCI format 1_0 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0117] DCI format 1_1 is used for scheduling PDSCH in a single cell. The information contained in DCI format 1_1 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0118] DCI format 1_2 is used for scheduling PDSCH in a single cell. The information contained in DCI format 1_2 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0119] quasi-co location (QCL)

[0120] Antenna ports are defined such that the channel through which a symbol on an antenna port is carried can be inferred from the channel through which another symbol on the same antenna port is carried. Two antenna ports are said to be in a QC / QCL (quasi co-located or quasi co-location) relationship if the properties of the channel through which a symbol on one antenna port is carried can be inferred from the channel through which a symbol on another antenna port is carried.

[0121] Here, the channel characteristics include one or more of delay spread, Doppler spread, frequency / Doppler shift, average received power, received timing / average delay, and spatial RX parameter. Here, the spatial Rx parameter refers to a spatial (reception) channel characteristic parameter such as angle of arrival.

[0122] A list of up to M TCI-State configurations may be set in the upper layer parameter PDSCH-Config to enable the UE to decode PDSCHs based on detected PDCCHs having intended DCIs for the UE and a given serving cell. The M depends on the UE capability.

[0123] Each TCI-State contains parameters for establishing a quasi co-location relationship between one or two DL reference signals and the demodulation reference signal (DM-RS) port of the PDSCH.

[0124] Quasi co-location relationships are established by the upper-layer parameters qcl-Type1 for the first DL RS and qcl-Type2 (if set) for the second DL RS. For two DL RSs, the QCL types are not the same, regardless of whether the references are the same DL RS or different DL RSs.

[0125] The QCL type corresponding to each DL RS is given by the upper layer parameter qcl-Type of QCL-Info, and can take one of the following values:

[0126] - 'QCL-TypeA': {Doppler shift, Doppler spread, average delay, delay spread}

[0127] - 'QCL-TypeB': {Doppler shift, Doppler spread}

[0128] - 'QCL-TypeC': {Doppler shift, average delay}

[0129] - 'QCL-TypeD': {Spatial Rx parameter}

[0130] For example, if a target antenna port is a specific NZP CSI-RS, the NZP CSI-RS antenna port can be instructed / configured to be QCL with a specific TRS from a QCL-Type A perspective and with a specific SSB from a QCL-Type D perspective. A terminal that has received such an instruction / configuration can receive the NZP CSI-RS using the Doppler and delay values ​​measured at the QCL-TypeA TRS, and apply the reception beam used for QCL-TypeD SSB reception to the reception of the NZP CSI-RS.

[0131] The UE can receive an activation command by MAC CE signaling, which is used to map up to eight TCI states to codepoints in the DCI field 'Transmission Configuration Indication'.

[0132] If a HARQ-ACK corresponding to a PDSCH carrying an active command is transmitted in slot n, the indicated mapping between the TCI state and the code point of the DCI field 'Transmission Configuration Indication' is slot n+3N. slotIt can be applied starting from subframe,μ+1. After the UE receives the initial upper layer configuration for the TCI states before receiving the ACTIVE command, for QCL-TypeA and, if applicable, for QCL-TypeD, the UE can assume that the DMRS port of the PDSCH of the serving cell is QCLed with the SS / PBCH block determined during the initial access process.

[0133] When a higher layer parameter (e.g., tci-PresentInDCI) indicating the presence of a TCI field in DCI configured for the UE is enabled for a CORESET scheduling a PDSCH, the UE may assume that a TCI field is present in DCI format 1_1 of a PDCCH transmitted on the corresponding CORESET. When tci-PresentInDCI is not configured for a CORESET scheduling a PDSCH or the PDSCH is scheduled by DCI format 1_0, and the time offset between the reception of a DL DCI and the corresponding PDSCH is greater than or equal to a predetermined threshold (e.g., timeDurationForQCL), in order to determine a PDSCH antenna port QCL, the UE may assume that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied to the CORESET used for the PDCCH transmission. Here, the predetermined threshold may be based on the reported UE capability.

[0134] When the parameter tci-PresentInDCI is set to enabled, the TCI field in the DCI of the scheduling CC (component carrier) may indicate the activated TCI state of the scheduled CC or DL ​​BWP. When the PDSCH is scheduled by DCI format 1_1, the UE may use the TCI state according to the value of the 'Transmission Configuration Indication' field of the detected PDCCH with DCI to determine the PDSCH antenna port QCL.

[0135] If the time offset between the reception of DL DCI and the corresponding PDSCH is greater than a predetermined threshold (e.g., timeDurationForQCL), the UE may assume that the DMRS port of the PDSCH of the serving cell is QCLed with the RS(s) of the TCI state for the QCL type parameter(s) given by the indicated TCI state.

[0136] When a single slot PDSCH is configured for a UE, the indicated TCI state may be based on the activated TCI state of the slot in which the scheduled PDSCH is present.

[0137] When a multi-slot PDSCH is configured for a UE, the indicated TCI state may be based on the activated TCI state of the first slot with scheduled PDSCH, and the UE may expect the activated TCI state to be the same across slots with scheduled PDSCH.

[0138] When a CORESET associated with a search space set for cross-carrier scheduling is configured for a UE, the UE may expect the tci-PresentInDCI parameter to be set to enabled for the corresponding CORESET. When one or more TCI states are configured for a serving cell scheduled by a search space set including QCL-TypeD, the UE may expect that the time offset between the reception of a PDCCH detected in the search space set and the corresponding PDSCH is greater than or equal to a predetermined threshold (e.g., timeDurationForQCL).

[0139] For both cases where the parameter tci-PresentInDCI is set to enabled and when tci-PresentInDCI is not set in RRC connected mode, if the time offset between the reception of a DL DCI and its corresponding PDSCH is less than a predetermined threshold (e.g., timeDurationForQCL), the UE may assume that the DMRS port of the PDSCH of the serving cell is QCLed with the RS(s) for the QCL parameter(s) used for the PDCCH QCL indication of the CORESET associated with the monitored search space having the lowest CORESET-ID in the latest slot in which one or more CORESETs within the active BWP of the serving cell are monitored by the UE.

[0140] In this case, if the QCL-TypeD of the PDSCH DMRS is different from the QCL-TypeD of the PDCCH DMRS and they overlap in at least one symbol, the UE can expect that reception of the PDCCH associated with the corresponding CORESET will be prioritized. This can also apply to intra-band carrier aggregation (when the PDSCH and the CORESET are on different CCs). If none of the configured TCI states includes QCL-TypeD, a different QCL assumption can be obtained among the indicated TCI states for the scheduled PDSCH, regardless of the time offset between reception of the DL DCI and its corresponding PDSCH.

[0141] For periodic CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the upper layer parameter trs-Info, the UE can expect the TCI state to indicate one of the following QCL type(s):

[0142] - QCL-TypeC with SS / PBCH block, and if applicable, QCL-TypeD with the same SS / PBCH block, or

[0143] - QCL-TypeC with SS / PBCH blocks, and if applicable, QCL-TypeD with CSI-RS resources in the configured NZP-CSI-RS-ResourceSet, including the upper layer parameter repetition.

[0144] For aperiodic CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, the UE can expect the TCI state to indicate QCL-TypeA with the periodic CSI-RS resources in the NZP-CSI-RS-ResourceSet with the higher layer parameter trs-Info, and, if applicable, QCL-TypeD with the same periodic CSI-RS resources.

[0145]

[0146] *For CSI-RS resources in NZP-CSI-RS-ResourceSet configured without upper layer parameter trs-Info and without upper layer parameter repetition, the UE can expect the TCI state to indicate one of the following QCL type(s):

[0147] - QCL-TypeA with a CSI-RS resource of the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with the same CSI-RS resource, or

[0148] - QCL-TypeA with CSI-RS resources of the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with SS / PBCH blocks, or

[0149] - QCL-TypeA with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter repetition, or

[0150] - QCL-TypeB with CSI-RS resources of NZP-CSI-RS-ResourceSet including upper layer parameter trs-Info, if QCL-TypeD is not applicable.

[0151] For CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the upper layer parameter repetition, the UE can expect the TCI state to indicate one of the following QCL type(s):

[0152] - QCL-TypeA with a CSI-RS resource of the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with the same CSI-RS resource, or

[0153] - QCL-TypeA with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter repetition, or

[0154] - QCL-TypeC with SS / PBCH blocks, and if applicable, QCL-TypeD with the same SS / PBCH blocks.

[0155] For DMRS on PDCCH, the UE can expect the TCI state to indicate one of the following QCL type(s):

[0156] - QCL-TypeA with a CSI-RS resource of the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with the same CSI-RS resource, or

[0157] - QCL-TypeA with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter repetition, or

[0158] - QCL-TypeA with CSI-RS resources of NZP-CSI-RS-ResourceSet configured without upper layer parameter trs-Info and without upper layer parameter repetition, and, if applicable, QCL-TypeD with the same CSI-RS resources.

[0159] For DMRS on PDSCH, the UE can expect the TCI state to indicate one of the following QCL type(s):

[0160] - QCL-TypeA with a CSI-RS resource of the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with the same CSI-RS resource, or

[0161] - QCL-TypeA with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter trs-Info, and if applicable, QCL-TypeD with a CSI-RS resource in the NZP-CSI-RS-ResourceSet configured including the upper layer parameter repetition, or

[0162] - QCL-TypeA with CSI-RS resources of NZP-CSI-RS-ResourceSet configured without upper layer parameter trs-Info and without upper layer parameter repetition, and, if applicable, QCL-TypeD with the same CSI-RS resources.

[0163] Actions related to multiple TRP (M-TRP)

[0164] FIG. 7 illustrates a multi-TRP transmission method in a wireless communication system to which the present disclosure can be applied.

[0165] Referring to Fig. 7(a), it shows a case where a layer group transmitting the same codeword (CW) / transport block (TB) corresponds to different TRPs. In this case, the layer group may refer to a predetermined layer set consisting of one or more layers. In this case, the amount of transmission resources increases due to the large number of layers, which has the advantage of enabling the use of robust channel coding with a low code rate for TB. In addition, since the channels are different from multiple TRPs, improved reliability of the received signal can be expected based on the diversity gain.

[0166] Referring to Fig. 7(b), an example of transmitting different CWs through layer groups corresponding to different TRPs is shown. 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 mean that the same TB is converted into different CWs through channel coding, etc. by different TRPs, respectively. Therefore, it can be viewed as an example of repeated transmission of the same TB. In the case of Fig. 7(b), compared to Fig. 7(a), there may be a disadvantage in that the code rate corresponding to the TB is high. However, it has an advantage in that the code rate can be adjusted or the modulation order of each CW can be adjusted by indicating different RV (redundancy version) values ​​for encoded bits generated from the same TB depending on the channel environment.

[0167] According to the method exemplified in Figures 7(a) and 7(b), the same TB is repeatedly transmitted through different layer groups, and since each layer group is transmitted by a different TRP / panel, the data reception probability of the terminal can be increased. This is referred to as an SDM (Spatial Division Multiplexing)-based M-TRP URLLC transmission method. Layers belonging to different layer groups are transmitted through DMRS ports belonging to different DMRS CDM groups.

[0168] In addition, although the above-described multiple TRP related content was explained based on the SDM (spatial division multiplexing) method using different layers, it can be extended and applied to the FDM (frequency division multiplexing) method based on different frequency domain resources (e.g., RB / PRB (set) etc.) and / or the TDM (time division multiplexing) method based on different time domain resources (e.g., slots, symbols, sub-symbols etc.).

[0169] Regarding the techniques for multi-TRP based URLLC scheduled by a single DCI, the following techniques are being discussed.

[0170] 1) Technique 1 (SDM): Time and frequency resource allocation overlap, and n (n<=Ns) TCI states within a single slot.

[0171] 1-a) Technique 1a

[0172] - At each transmission occasion, the same TB is transmitted in one layer or set of layers, and each layer or set of layers is associated with one TCI and one set of DMRS port(s).

[0173] - A single codeword with a single RV is used across all spatial layers or across a set of layers. From the UE perspective, different coded bits are mapped to different layers or sets of layers using the same mapping rule.

[0174] 1-b) Technique 1b

[0175] - At each transmission occasion, the same TB is transmitted in one layer or set of layers, and each layer or set of layers is associated with one TCI and one set of DMRS port(s).

[0176] - A single codeword with one RV is used for each spatial layer or set of layers. The RV(s) corresponding to each spatial layer or set of layers may be the same or different.

[0177] 1-c) Technique 1c

[0178] - At one transmission occasion, the same TB having one DMRS port associated with multiple TCI state indices is transmitted in one layer, or the same TB having multiple DMRS ports that are one-to-one associated with multiple TCI state indices is transmitted in one layer.

[0179] For techniques 1a and 1c above, the same MCS is applied to all layers or a set of all layers.

[0180] 2) Technique 2 (FDM): Frequency resource allocation does not overlap, and there are n (n<=Nf) TCI states in a single slot.

[0181] - Each non-overlapping frequency resource allocation is associated with one TCI state.

[0182] - The same single / multiple DMRS port(s) are associated with all non-overlapping frequency resource allocations.

[0183] 2-a) Technique 2a

[0184] - A single codeword with a single RV is used for all resource allocations. From the UE perspective, common RB matching (mapping of codewords to layers) is applied to all resource allocations.

[0185] 2-b) Technique 2b

[0186] - A single codeword with a single 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.

[0187] As for technique 2a above, the same MCS is applied to all non-overlapping frequency resource allocations.

[0188] 3) Technique 3 (TDM): Time resource allocation does not overlap, and n (n<=Nt1) TCI states within a single slot.

[0189] - Each transmission occasion of a TB has one TCI and one RV with a time granularity of mini-slots.

[0190] - A common MCS is used for all transmission occasions within a slot, either single or multiple DMRS port(s).

[0191] - RV / TCI can be same or different at different transmission occasions.

[0192] 4) Technique 4 (TDM): n (n<=Nt2) TCI states in K (n<=K) different slots

[0193] - Each transmission occasion of TB has one TCI and one RV.

[0194] - All transmission occasions across K slots use a common MCS to single or multiple DMRS port(s).

[0195] - RV / TCI can be same or different at different transmission occasions.

[0196] Downlink multi-TRP (M-TRP) URLLC transmission operation

[0197] DL M-TRP URLLC transmission method refers to a method in which multiple TRPs transmit the same data / DCI using different space (e.g., layer / port) / time / frequency resources. For example, TRP 1 can transmit specific data / DCI in resource 1, and TRP 2 can transmit the specific data / DCI (i.e., the same data / DCI) in resource 2.

[0198] That is, when the DL M-TRP URLLC transmission method is set, the terminal can receive the same data / DCI using different space / time / frequency resources. At this time, the terminal can receive an indication from the base station about the QCL RS / type (i.e., DL TCI state) used in the space / time / frequency resources for receiving the corresponding data / DCI.

[0199] For example, if the corresponding data / DCI is received from resource 1 and resource 2, the terminal can be instructed by the base station about the DL TCI state used in resource 1 and the DL TCI state used in resource 2. By receiving the corresponding data / DCI through resource 1 and resource 2, high reliability can be achieved. This M-TRP URLLC transmission method can be applied to PDSCH / PDCCH.

[0200] UL M-TRP URLLC transmission method refers to a method in which multiple TRPs receive the same data / UCI from a terminal using different space / time / frequency resources. For example, TRP 1 can receive the same data / UCI from a terminal on resource 1, and TRP 2 can receive the same data / UCI from a terminal on resource 2. In addition, TRP 1 and TRP 2 can share the data / UCI received from the terminal through a backhaul link (connected between TRPs).

[0201] 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 space / time / frequency resources. At this time, the terminal can be instructed by the base station about the Tx beam and Tx power (i.e., UL TCI state) to be used in the space / time / frequency resources for transmitting the same data / UCI. For example, when the same data / UCI is transmitted in resource 1 and resource 2, the terminal can be instructed by the base station about the UL TCI state used in resource 1 and the UL TCI state used in resource 2. This UL M-TRP URLLC can be applied to PUSCH / PUCCH.

[0202] In addition, in describing the present disclosure, when receiving / transmitting data / DCI / UCI through specific space / time / frequency resources, using (or mapping) a specific TCI state (or TCI) may mean, in the case of DL, estimating a channel from a DMRS using a QCL type and QCL RS indicated by the specific TCI state in the specific space / time / frequency resources, and receiving / demodulating data / DCI / UCI with the estimated channel.

[0203] And, when receiving / transmitting data / DCI / UCI through specific space / time / frequency resources, using (or mapping) a specific TCI state (or TCI) may mean, in the case of UL, transmitting / modulating DMRS and data / UCI using a Tx beam and / or Tx power indicated by a specific TCI state in a specific space / time / frequency resource.

[0204] In addition, the UL TCI state may include Tx beam or Tx power information of the terminal. In addition, the base station may set other parameters, such as spatial relation information, for the terminal instead of the TCI state.

[0205] For example, the UL TCI state can be directly indicated to the UE via the UL grant DCI. Alternatively, the UL TCI state can mean spatial relationship information of SRS resources indicated via the SRI (SRS resource indicator) field of the UL grant DCI. Alternatively, the UL TCI state can mean an open loop (OP) Tx power control parameter linked to a value indicated via the SRI field of the UL grant DCI.

[0206] Here, the OL Tx power control parameters may include, for example, j (index for OP parameter(s) Po and alpha (set of up to 32 parameter values ​​per cell), q_d (index of DL RS resources for path loss (PL) measurement (up to 4 measurements per cell), or / and I (closed-loop power control process index (up to 2 processes per cell)).

[0207] In another embodiment of the present disclosure, the M-TRP eMBB transmission method refers to a method in which M-TRP transmits different data / DCI using different space / time / frequency resources. When the M-TRP eMBB transmission method is set, the terminal can receive indications of multiple TCI states from the base station through DCI, and can assume that the data received using the QCL RS indicated by each of the multiple TCI states are different data.

[0208] In addition, since the RNTI for M-TRP URLLC and the M-TRP eMBB RNTI are used separately, the terminal can determine whether a specific transmission / reception is an M-TRP URLLC transmission / reception or an M-TRP eMBB transmission / reception. For example, if the RNTI for URLLC is used and CRC masking is performed on the DCI, the terminal can determine the corresponding transmission as a URLLC transmission. In addition, if the RNTI for eMBB is used and CRC masking is performed on the DCI, the terminal can determine the corresponding transmission as an eMBB transmission. As another example, the base station can set the M-TRP URLLC transmission / reception method or the M-TRP eMBB transmission / reception method to the terminal through new signaling.

[0209] For the convenience of explanation of the present disclosure, it is assumed that two TRPs cooperate with each other to perform transmission / reception operations, but this is not limited thereto. That is, the present disclosure can be expanded to a multi-TRP environment of three or more, and can also be expanded to an environment in which transmission / reception is performed using different panels or beams in the same TRP. A terminal can recognize different TRPs as having different TCI states. When a terminal transmits / receives data / DCI / UCI using TCI state 1, it means that it transmits / receives data / DCI / UCI / from TRP 1 (or to TRP 1).

[0210] The present disclosure can be utilized in situations where M-TRPs cooperatively transmit PDCCHs (repeatedly or in segments) . Furthermore, the present disclosure can also be utilized in situations where M-TRPs cooperatively transmit PDSCHs or cooperatively receive PUSCHs / PUCCHs.

[0211] Additionally, in describing the present disclosure, the meaning that multiple base stations (i.e., M-TRPs) repeatedly transmit the same PDCCH may mean that the same DCI is transmitted through multiple PDCCH candidates, and is the same as the meaning that multiple base stations repeatedly transmit the same DCI. Here, two DCIs having the same DCI format / size / payload can be viewed as the same DCI.

[0212] Alternatively, if the scheduling results are the same even though the payloads of two DCIs are different, the two DCIs can be considered the same DCI. For example, the time domain resource allocation (TDRA) field of a DCI can relatively determine the slot / symbol positions of data and the slot / symbol positions of A(ACK) / N(NACK) based on the time of reception of the DCI.

[0213] At this time, if the DCI received at point n and the DCI received at point n+1 indicate the same scheduling result to the terminal, the TDRA fields of the two DCIs will be different, and as a result, the DCI payloads will be different. Therefore, even if the payloads of the two DCIs are different, if the scheduling results are the same, the two DCIs can be viewed as the same DCI. Here, the number of repetitions R can be directly indicated by the base station to the terminal or can be mutually agreed upon.

[0214] Alternatively, even if the payloads of two DCIs are different and the scheduling results are not identical, if the scheduling result of one DCI is a subset of the scheduling result of the other DCI, the two DCIs can be considered the same DCI.

[0215] For example, if the same data is TDM-transmitted repeatedly N times, DCI 1 received before the first data indicates (or schedules) data repetition N times, and DCI 2 received before the second data indicates data repetition (scheduling) N-1 times. At this time, the scheduling result (or data) of DCI 2 becomes 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 can be viewed as the same DCI.

[0216] And, in explaining the present disclosure, multiple base stations (i.e., M-TRPs) dividing and transmitting the same PDCCH may mean transmitting one DCI through one PDCCH candidate, with TRP 1 transmitting some resources defined for the PDCCH candidate and TRP 2 transmitting the remaining resources.

[0217] For example, if TRP 1 and TRP 2 divide and transmit PDCCH candidates corresponding to aggregation levels m1 + m2, the PDCCH candidates are divided into PDCCH candidate 1 corresponding to aggregation level m1 and PDCCH candidate 2 corresponding to aggregation level m2, and TRP 1 can transmit PDCCH candidate 1 and TRP 2 can transmit PDCCH candidate 2. At this time, TRP 1 and TRP 2 can transmit PDCCH candidate 1 and PDCCH candidate 2 using different time / frequency resources. After receiving PDCCH candidate 1 and PDCCH candidate 2, the terminal can generate a PDCCH candidate corresponding to aggregation level m1 + m2 and attempt DCI decoding.

[0218] At this time, the method of dividing the same DCI and transmitting it to multiple PDCCH candidates can be implemented in the following two ways.

[0219] The first method is a method in which a DCI payload (e.g., control information + CRC) is encoded through a single channel encoder (e.g., a polar encoder) and transmitted by dividing it into two TRPs. In other words, the first method means a method in which the coded bits obtained according to the encoding result are divided and transmitted into the two TRPs. Here, the entire DCI payload may be encoded in the coded bits transmitted by each TRP, but this is not limited, and only a portion of the DCI payload may be encoded.

[0220] The second method divides the DCI payload (e.g., control information + CRC) into two DCIs (e.g., DCI 1 and DCI 2), and then encodes each of them using a channel encoder (e.g., a polar encoder). Then, 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.

[0221] That is, the fact that multiple base stations (M-TRPs) divide / repeat the same PDCCH and transmit it over multiple MOs (monitoring occasions) can mean 1) repeatedly transmitting coded bits encoding the entire DCI content of the corresponding PDCCH through each MO for each base station (S-TRP), 2) dividing the coded bits encoding the entire DCI content of the corresponding PDCCH into multiple parts, and transmitting different parts through each MO for each base station (S-TRP), or 3) dividing the DCI content of the corresponding PDCCH into multiple parts, encoding different parts for each base station (S-TRP) (i.e., separate encoding), and transmitting them through each MO.

[0222] Repeated / divided transmission of PDCCH can be understood as transmitting PDCCH multiple times over multiple TOs (transmission occasions).

[0223] Here, TO may refer to a specific time and / or frequency resource unit in which the PDCCH is transmitted. For example, if the PDCCH is transmitted multiple times (in a specific RB) across slots 1, 2, 3, and 4, TO may refer to each slot. As another example, if the PDCCH is transmitted multiple times (in a specific slot) across RB sets 1, 2, 3, and 4, TO may refer to each RB set. As another example, if the PDCCH is transmitted multiple times across different times and frequencies, TO may refer to each time / frequency resource. In addition, the TCI state used for DMRS channel estimation may be set differently for each TO, and TOs with different TCI states may be assumed to have been transmitted by different TRPs / panels.

[0224] Repeated or divided transmission of a PDCCH by multiple base stations means that the PDCCH is transmitted across multiple TOs, and the union of the TCI states set for the TOs consists of two or more TCI states. For example, if a PDCCH is transmitted across TOs 1, 2, 3, and 4, TCI states 1, 2, 3, and 4 may be set for TOs 1, 2, 3, and 4 respectively, which means that TRP i cooperatively transmitted the PDCCH on TO i.

[0225] In describing the present disclosure, when a terminal repeatedly transmits the same PUSCH to multiple base stations (i.e., M-TRP), it may mean that the terminal transmits the same data through multiple PUSCHs, and each PUSCH may be transmitted in an optimized manner on an UL channel of a different TRP.

[0226] For example, a terminal may repeatedly transmit the same data through PUSCH 1 and PUSCH 2. At this time, PUSCH 1 is transmitted using UL TCI state 1 for TRP 1, and link adaptation such as precoder / MCS may also be scheduled with a value optimized for the channel of TRP 1, and the PUSCH may be transmitted. PUSCH 2 is transmitted using UL TCI state 2 for TRP 2, and link adaptation such as precoder / MCS may also be scheduled with a value optimized for the channel of TRP 2, and the PUSCH may be transmitted. At this time, PUSCH 1 and PUSCH 2 that are repeatedly transmitted may be transmitted at different times and may be TDM, FDM, or SDM.

[0227] In addition, in explaining the present disclosure, the fact that a terminal divides the same PUSCH into multiple base stations (i.e., M-TRPs) and transmits it may mean that one data is transmitted through one PUSCH, but resources allocated to the PUSCH are divided and transmitted in an optimized manner on UL channels of different TRPs.

[0228] For example, a terminal can transmit the same data through a 10-symbol PUSCH. At this time, the first 5 symbols of the 10 symbols can be transmitted using UL TCI state 1 for TRP 1, and the terminal can transmit the 5-symbol PUSCH (as TRP 1) by scheduling a value optimized for the channel of TRP 1, such as a precoder / MCS, for link adaptation. The remaining 5 symbols can be transmitted using UL TCI state 2 for TRP 2, and the terminal can transmit the remaining 5-symbol PUSCH (as TRP 2) by scheduling a value optimized for the channel of TRP 2, such as a precoder / MCS, for link adaptation.

[0229] In the above example, a method of dividing one PUSCH into time resources and performing TDM for transmission toward TRP 1 and transmission toward TRP 2 was described, but the present disclosure is not limited thereto, and a terminal can divide the same PUSCH and transmit it to multiple base stations by using the FDM / SDM method.

[0230] A terminal can repeatedly transmit a PUCCH to multiple base stations (similar to PUSCH transmission) or divide and transmit the same PUCCH.

[0231] And, when multiple TOs are indicated to a UE in order to repeatedly transmit or divide PDCCH / PDSCH / PUSCH / PUCCH, each TO can transmit UL toward a specific TRP or receive DL from a specific TRP. At this time, the UL TO transmitted toward TRP 1 (or TO of TRP 1) may 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 indicated to the UE. And, the UL TO transmitted toward TRP 2 (or TO of TRP 2) means a TO that uses the second value among two spatial relations, two UL TCIs, two UL power control parameters, and two PL-RSs indicated to the UE.

[0232] Similarly, in DL transmission, the DL TO transmitted by TRP 1 (or TO of TRP 1) may mean a TO that uses the first value among the two DL TCI states indicated to the terminal (for example, when two TCI states are set in CORESET), and the DL TO transmitted by TRP 2 (or TO of TRP 2) may mean a TO that uses the second value among the two DL TCI states indicated to the terminal (for example, when two TCI states are set in CORESET).

[0233] The present disclosure can be extended to various channels, such as PUSCH / PUCCH / PDSCH / PDCCH. Furthermore, the present disclosure can be extended to both cases where the channels are repeatedly transmitted on different space / time / frequency resources and cases where the channels are transmitted in segmented manner.

[0234] In addition, from the perspective of DCI transmission, the M-TRP transmission method can be divided into i) M-TRP transmission method based on M-DCI (multiple DCI) in which each TRP transmits a different DCI, and ii) M-TRP transmission method based on S-DCI (single DCI) in which one TRP transmits a DCI. For example, in the case of S-DCI, all scheduling information for data transmitted by an M-TRP must be transmitted through a single DCI, so it can be used in an ideal BH (ideal BackHaul) environment in which dynamic cooperation between two TRPs is possible.

[0235] Enhanced M-TRP transmission and reception

[0236] In relation to M-TRP transmission and reception in Rel-16 NR standardization, PDSCH transmission and reception according to S-DCI-based M-TRP transmission method and M-DCI-based M-TRP transmission method are supported.

[0237] First, we will look at the S-DCI-based M-TRP PDSCH transmission method.

[0238] S-DCI-based M-TRP PDSCH transmission can use one of SDM / FDM / TDM methods. In the case of SDM, the base station transmits one TB using multiple layers, and transmits layers belonging to different DMRS CDM groups using different transmit beams (i.e., QCL RS or TCI states). This can increase the number of layers compared to the existing S-TRP transmission method, thereby improving transmission capacity. In addition, when one TB is transmitted using multiple layers, some layers are transmitted to TRP 1 and the remaining layers are transmitted to TRP 2, which can improve channel reliability due to diversity gain.

[0239] For FDM, two schemes, scheme 2a and 2b, are supported. Here, scheme 2a transmits one TB to multi-RBs, but transmits RBs belonging to different RB groups with different Tx beams (i.e., QCL RS or TCI states). Scheme 2b transmits the same TB to different RB groups, but transmits RBs belonging to different RB groups with different Tx beams (i.e., QCL RS or TCI states). For TDM, two schemes, scheme 3 and 4, are supported. Here, scheme 4 (i.e., inter-slot TDM) repeatedly transmits the same TB in multiple slots, but transmits slots belonging to different slot groups with different Tx beams (i.e., QCL RS or TCI states). On the other hand, Scheme 3 (i.e., intra-slot TDM) repeatedly transmits the same TB in multiple OFDM symbol groups, but transmits some OFDM symbol groups and the remaining OFDM symbol groups with different Tx beams (i.e., QCL RS or TCI state).

[0240] Next, we will look at the M-DCI-based M-TRP PDSCH transmission method.

[0241] M-DCI based MTRP PDSCH transmission is a method in which each TRP schedules and transmits PDSCH through DCI. That is, TRP 1 transmits PDSCH 1 through DCI 1, and TRP 2 transmits PDSCH 2 through DCI 2. When PDSCH 1 and PDSCH 2 overlap in the same frequency / time resource, two PDSCHs are received for the same RE, which increases resource efficiency and increases transmission capacity. To this end, the concept of a CORESET pool, which refers to a group of multiple CORESETs, was introduced. For example, TRP 1 transmits a PDCCH through a CORESET belonging to CORESET pool 0, and also transmits the PDSCH scheduled by the PDCCH. TRP 2 transmits a PDCCH through a CORESET belonging to CORESET pool 1, and also transmits the PDSCH scheduled by the PDCCH.

[0242] Even for PUSCH, specific TRPs can schedule PUSCH transmissions to UEs via CORESETs within each COERSET pool. For example, some PUCCH resources may be scheduled by TRP 1, while the remaining PUCCH resources may be scheduled by TRP 2. UEs can transmit independent PUSCH / PUCCHs for each of TRPs 1 and 2.

[0243] In addition, the terminal may recognize the PUSCH (or PUCCH) scheduled by the DCI received based on different CORESETs (or CORESETs belonging to different CORESET groups) as a PUSCH (or PUCCH) transmitted to different TRPs or as a PUSCH (or PUCCH) of different TRPs. In addition, the method for UL transmission (e.g., PUSCH / PUCCH) transmitted to different TRPs can be equally applied to UL transmission transmitted to different panels belonging to the same TRP.

[0244] In addition, the CORESET group ID (or COERSET pool index having the same meaning) described / mentioned in the present disclosure may mean an index / identification information (e.g., ID) for distinguishing the CORESET for each TRP / panel. And the CORESET group may mean a group / union of CORESETs distinguished by an index / identification information (e.g., ID) / CORESET group ID for distinguishing the CORESET for each TRP / panel. For example, the CORESET group ID may be specific index information defined in the CORESET configuration. That is, the CORESET group may be set / indicated / defined by an index defined in the CORESET configuration for each CORESET. And / or, the CORESET group ID may mean an index / identification information / indicator for distinguishing / identifying the CORESETs set / associated with each TRP / panel.

[0245] The CORESET group ID described / mentioned in the present disclosure may be expressed by being replaced with a specific index / specific identification information / specific indicator for distinguishing / identifying the CORESETs set / associated with each TRP / panel. The information may be set / indicated through higher layer signaling (e.g., RRC signaling, MAC-CE, etc.) and / or physical layer signaling (e.g., DCI). For example, PDCCH detection may be set / indicated to be performed for each TRP / panel in units of the corresponding CORESET group, and UCI (e.g., CSI, HARQ-ACK / NACK, SR, etc.) and / or uplink physical channel resources (e.g., PUCCH / PRACH / SRS resources) may be set / indicated to be managed / controlled separately for each TRP / panel in units of the corresponding CORESET group. And / or, HARQ ACK / NACK (process / retransmission) for PDSCH / PUSCH, etc. scheduled for each TRP / panel by CORESET group unit can be managed.

[0246] For example, the upper layer parameter ControlResourceSet information element (IE) is used to configure a time / frequency control resource set (CORESET). The CORESET may be related to detection / reception of downlink control information. The ControlResourceSet IE may include a CORESET-related ID (e.g., controlResourceSetID) / a CORESET pool index for the CORESET (e.g., CORESETPoolIndex) / time / frequency resource configuration of the CORESET / TCI information related to the CORESET, etc. For example, the index of the CORESET pool (e.g., CORESETPoolIndex) may be set to 0 or 1. In the description above in the present disclosure, a CORESET group may correspond to a CORESET pool, and a CORESET group ID may correspond to a CORESET pool index (e.g., CORESETPoolIndex). The above-described ControlResourceSet (i.e., CORESET) can be set via higher layer signaling (e.g., RRC signaling).

[0247] Additionally, with respect to M-TRP transmission and reception in Rel-17 NR standardization, M-TRP PDCCH / PDSCH SFN transmission, S-DCI-based M-TRP PUSCH repeated transmission, and single PUCCH resource-based M-TRP PUCCH repeated transmission are supported. These transmission techniques repeatedly transmit the same contents (i.e., DCI / UL TB / UCI, etc.) with improved URLLC target for increased reliability. Here, M-TRP PDCCH repeated transmission is performed based on TDM or FDM, M-TRP PDCCH / PDSCH SFN transmission is performed in the same time / frequency / layer, S-DCI-based M-TRP PUSCH repeated transmission is performed based on TDM, and single PUCCH resource-based M-TRP PUCCH repeated transmission is performed based on TDM.

[0248] First, we will look at the S-DCI-based M-TRP PDCCH repetition transmission method.

[0249] In the NR Rel-17 standardization, multiple CORESETs with different TCI states (i.e., different QCL RSs) are configured for the UE for repeated M-TRP PDCCH transmission, and multiple SS (Search Space) sets are configured, each linked to the corresponding CORESETs. The base station can instruct / configure the UE that the SS set connected to one CORESET and the SS set connected to another CORESET are linked for repeated transmission. Through this, the UE can be informed that the PDCCH candidates of the corresponding SS set are being repeatedly transmitted.

[0250] For example, two CORESETs, CORESET 0 and CORESET 1, may be set for a terminal, CORESET 0 and CORESET 1 may be connected to SS set 0 and SS set 1, respectively, and SS set 0 and SS set 1 may be linked. The terminal may recognize that the same DCI has been repeatedly transmitted in the PDCCH candidate of SS set 0 and the PDCCH candidate of SS set 1, and may recognize that a specific PDCCH candidate of SS set 0 and a specific PDCCH candidate of SS set 1 are a pair set for repeatedly transmitting the same DCI based on a specific rule. The two PDCCH candidates are referred to as linked PDCCH candidates, and the terminal may successfully decode the corresponding DCI if it properly receives either of the two PDCCH candidates. However, when receiving a PDCCH candidate of SS set 0, the terminal may use the QCL RS (i.e., DL beam) of the TCI state of COERSET 0 connected to SS set 0, and when receiving a PDCCH candidate of SS set 1, the terminal may use the QCL RS (i.e., DL beam) of the TCI state of COERSET 1 connected to SS set 1. Accordingly, the terminal receives linked PDCCH candidates using different beams.

[0251] Next, we will look at the M-TRP SFN PDCCH / PDSCH transmission method.

[0252] M-TRP is a type of PDCCH repetition transmission, in which multiple TRPs can repeatedly transmit the same DCI through the same time / frequency / DMRS port. This transmission method can be referred to as SFN PDCCH transmission. However, for SFN PDCCH transmission, instead of configuring multiple CORESETs with different TCI states, the base station configures multiple TCI states in a single CORESET. When a terminal receives a PDCCH candidate through an SS set connected to a single CORESET, it can perform channel estimation of the PDCCH DMRS using all of the multiple TCI states and attempt decoding.

[0253] In addition, when the above-described M-TRP PDSCH is repeatedly transmitted, the two TRPs repeatedly transmit the corresponding channel on different resources. However, if the two TRPs use the same resource, that is, if the same channel is repeatedly transmitted through the same frequency / time / layer (i.e., DMRS port), the reliability of the corresponding channel can be improved. In this case, the repeatedly transmitted same channel is not distinguished in terms of resources, so it is received by being combined during transmission (i.e., over the air), and thus can be recognized as a single channel (e.g., a composite channel) from the perspective of the receiving end (e.g., a terminal). For SFN PDSCH transmission, two DL TCI states for PDSCH DMRS reception can be set for the terminal.

[0254] Next, we will look at the S-DCI-based M-TRP PUSCH repetitive transmission scheme.

[0255] In NR Rel-17 standardization, the base station configures two SRS sets for the UE for S-DCI-based M-TRP PUSCH transmission, and each set is used to indicate the UL Tx port and UL beam / QCL information for TRP 1 and TRP 2, respectively. In addition, the base station can indicate SRS resources for each SRS resource set through two SRI fields included in one DCI, and can indicate up to two PC parameter sets. For example, the first SRI field can indicate the SRS resources and PC parameter set defined in SRS resource set 0, and the second SRI field can indicate the SRS resources and PC parameter set defined in SRS resource set 1. The UE can be indicated the UL Tx port, PC parameter set, and UL beam / QCL information for TRP 1 through the first SRI field, and through this, the UE performs PUSCH transmission in the TO corresponding to SRS resource set 0. Similarly, the terminal can be instructed with the UL Tx port, PC parameter set, and UL beam / QCL information for TRP 2 through the second SRI field, through which the terminal performs PUSCH transmission in the TO corresponding to SRS resource set 1.

[0256] Next, we examine a single PUCCH resource-based M-TRP PUCCH repetition transmission scheme.

[0257] In NR Rel-17 standardization, for M-TRP PUCCH transmission based on a single PUCCH resource, a base station can activate / configure two spatial relation info (if FR1, activate / configure two PC parameter sets) for a single PUCCH resource to a UE. When UL UCI is transmitted through the PUCCH resource, each spatial relation info is used to indicate spatial relation info toward TRP 1 and TRP 2 to the UE. For example, through the value indicated in the first spatial relation info, the UE is instructed with Tx beam / PC parameter(s) toward TRP 1, and the UE performs PUCCH transmission at the TO corresponding to TRP 1 using the information. Similarly, through the value indicated in the second spatial relation info, the UE is instructed with Tx beam / PC parameter(s) toward TRP 2, and the UE performs PUCCH transmission at the TO corresponding to TRP 2 using the information.

[0258] In addition, for M-TRP PUCCH repeated transmission, the configuration method has been improved so that two new spatial relation info can be configured for a PUCCH resource. That is, if PC (power control) parameters such as PLRS, Alpha, P0, and Closed loop index are configured for each spatial relation info, a spatial relation RS can be configured. Consequently, PC information and spatial relation RS information corresponding to two TRPs can be configured through two spatial relation info. Through this, the terminal transmits a UCI (i.e., CSI, ACK / NACK, SR, etc.) PUCCH using the first spatial relation info in the first TO, and transmits the same UCI PUCCH using the second spatial relation info in the second TO. In the present disclosure, a PUCCH resource with two spatial relation info configured is referred to as an M-TRP PUCCH resource, and a PUCCH resource with one spatial relation info configured is referred to as an S-TRP PUCCH resource.

[0259] Additionally, in NR wireless communication systems, multi-TB PUSCH / PDSCH scheduling based on S-DCI may be considered. For example, in ultra-high frequency bands (e.g., beyond 5.26 GHz, FR2 band) of NR wireless communication systems (e.g., Rel-17-based NR systems), a method in which a single DCI simultaneously schedules multiple PUSCHs / PDSCHs may be supported.

[0260] As a specific example, multiple time resources (e.g., TDRA, TO (Transmission Occasion)) can be indicated at once through the time resource allocation field (e.g., TDRA field) of the DCI that schedules the PUSCH. In this case, different TBs can be transmitted for each TO through the PUSCH. The values ​​of the frequency resource allocation field (e.g., FDRA field), the Modulation and Coding Scheme (MCS) field, the transmitted precoding matrix indicator (TPMI) field, and / or the SRS resource Indicator (SRI) field of the DCI can be commonly applied to multiple TBs to be scheduled. In addition, the new data indicator (NDI) and the redundancy version (RV) for each TB are individually indicated through the DCI, and the HARQ number is indicated by a single value, but can sequentially increase in the order of the TOs based on the initial TO.

[0261] Additionally, in relation to the NR wireless communication system, a method in which a terminal simultaneously transmits multiple channels / RSs of the same type or multiple channels / RSs of different types may be considered.

[0262] Existing terminals have limitations in transmitting multiple channels / RSs at a single point in time. For example, a terminal can simultaneously transmit multiple SRS resources from different SRS resource sets for UL beam management, but cannot simultaneously transmit multiple PUSCHs. In contrast, future advanced terminals may consider relaxing these limitations and simultaneously transmitting multiple channels / RSs using multiple transmission panels. Such terminals may be referred to as STxMP (simultaneous transmission across multi-panel) terminals.

[0263] For example, a method may be applied in which two PUSCHs corresponding to two UL TBs (i.e., a first PUSCH and a second PUSCH) are scheduled in the same RE (resource element), a first spatial information RS and a first power control (PC) parameter set are set for the first PUSCH, and a second spatial information RS and a second PC parameter set are set for the second PUSCH. That is, a first UL TCI state may be set for the first PUSCH, and a second UL TCI state may be set for the second PUSCH. In this case, the UE may transmit the first PUSCH using a first Tx spatial filter (e.g., a first panel) corresponding to the first UL TCI state, and transmit the second PUSCH using a second Tx spatial filter (e.g., a second panel) corresponding to the second UL TCI state.

[0264] In this regard, when the base station schedules the PUSCH through DCI, the base station can instruct the terminal on which of the STxMP scheme, single panel-based scheme, or M-TRP-based PUSCH repetition transmission scheme to apply as the corresponding PUSCH transmission scheme. Here, the STxMP scheme is possible if the terminal supports STxMP capability, and the STxMP mode needs to be enabled in advance for the terminal through RRC signaling, etc. To this end, the existing SRS resource set indication field may be redefined, or a new DCI field may be introduced.

[0265] Additionally, with respect to the aforementioned STxMP transmission method, two methods can be considered: the SFN (single frequency network) method and the SDM (spatial division multiplexing) method.

[0266] Specifically, the SFN method transmits the same channel transmitted by one panel to other panels. Since the UL channels of each panel may differ, UL transmission can be performed using different precoders, different transmit powers, and different transmission beams (e.g., spatial relationship RSs indicated by the UL TCI status) for each panel.

[0267] The SDM method is a method that can be applied to transmission based on ranks greater than or equal to 2, and is a method in which some layers among multi-layers are transmitted on one panel and the remaining layers are transmitted on another panel. For example, in the case of the SDM method for 2-layer transmission, the first layer may be transmitted on the first panel, and the second layer may be transmitted on the second panel. In this case, since the UL channels of each panel may be different, UL transmission may be performed using different precoders, different transmit powers, and different transmit beams (e.g., spatial relationship RSs indicated by the UL TCI state) for each panel.

[0268] The panels described in this disclosure may be applied by replacing them with other resources / terms corresponding to the panels.

[0269] For example, different panels may be mapped to and used for different SRS resource sets or SRS resources. As a specific example, a first panel may be mapped to SRS resource set 0, and a second panel may be mapped to SRS resource set 1. In this case, the SRS resource(s) belonging to SRS resource set 0 may be associated with the (transmit) antenna port of the first panel, and the SRS resource(s) belonging to SRS resource set 1 may be associated with the (transmit) antenna port of the second panel.

[0270] In addition, in NR wireless communication systems, not only the DL TCI state but also the UL TCI state can be indicated together through DL DCI (e.g., DCI format 1_1 / 1_2, etc.), and only the UL TCI state can be indicated without indicating the DL TCI state. Through this, the method(s) used for UL spatial information (e.g., UL beam) and PC (power control) setting in existing NR wireless communication systems (e.g., NR systems in Rel-15 / 16) can be replaced / extended and applied as a method for indicating the UL TCI state.

[0271] As a concrete example, one UL TCI state can be indicated through the TCI field of DL DCI, and the UL TCI state can be applied to all PUSCHs / PUCCHs after a certain period of time (e.g., beam application time). In addition, the UL TCI state can be applied to some or all SRS resource sets.

[0272] In this regard, a method of indicating multiple UL TCI states (and / or DL ​​TCI states) through the TCI field of DL DCI may also be considered.

[0273] Method for setting / instructing uplink transmission for a terminal that supports sharing M ports among N panels

[0274] In relation to PUSCH transmission, the terminal may apply the STRP (single TRP) transmission method or the STxMP-based SDM transmission method. Here, the STRP transmission method may mean a single panel-based transmission method, i.e., non-STxMP transmission. In this regard, the terminal may configure / receive instructions from the base station to use the STRP transmission method or the STxMP-based SDM transmission method for PUSCH transmission.

[0275] Figure 8 illustrates a structure for sharing ports between panels to which the present disclosure can be applied.

[0276] Referring to FIG. 8, with respect to the implementation method of the terminal, a structure in which N digital ports can be shared for multiple panels (e.g., Panel 0, Panel 1, etc.) can be considered.

[0277] The digital port described in the present disclosure may mean a port having an independent TxRU for each digital port, an independent PA (power amplifier), or a port where a baseband signal is processed.

[0278] For example, in the case of a 4-port STRP transmission as in Fig. 8(a), the terminal can use either the 4 ports belonging to Panel 0 or the 4 ports belonging to Panel 1. In contrast, in the case of a 4-port SDM transmission as in Fig. 8(b), the terminal can divide and use 2 ports for each panel. That is, in this case, the terminal can use 2 ports belonging to Panel 0 and 2 ports belonging to Panel 1.

[0279] In the present disclosure, a method is proposed for indicating a PMI (precoding matrix indicator) for uplink transmission and applying a full power transmission mode related thereto for a terminal supporting a method in which M panels share N ports (e.g., digital ports) (wherein M and N are natural numbers).

[0280] For clarity of explanation, it is assumed that the terminal (UE) mentioned in the following description is a terminal that supports a method in which M panels share N ports (e.g., digital ports).

[0281] In this regard, whether M panels support the method of sharing N ports may be information reported to the base station as capability information of the terminal, or may be information that is pre-defined / implemented. For example, with respect to reporting capability information of the terminal, if the number of NZP (non-zero power) PUSCH antenna ports reported by the terminal is smaller than the number of SRS antenna ports (i.e., the number of antenna ports supported by one panel), the terminal may be interpreted as supporting the method of sharing ports between panels.

[0282] Example 1

[0283] This embodiment relates to a method for indicating and applying PMI in relation to uplink transmission of a terminal that supports a method in which M panels share N ports (e.g., digital ports).

[0284] When STRP transmission or STxMP transmission is set, the terminal can use the digital port as shown in FIG. 8(a) or the method shown in FIG. 8(b), respectively.

[0285] To this end, two SRS resource sets may be set for the terminal, and a 4-port SRS resource may be set for an SRS resource set (e.g., SRS resource set 0) corresponding to a first panel (e.g., Panel 0), and a 4-port SRS resource may be set for an SRS resource set (e.g., SRS resource set 1) corresponding to a second panel (e.g., Panel 1). Through two SRI fields (i.e., a first SRI field, a second SRI field) in UL scheduling DCI (e.g., DCI format 0_0, DCI format 0_1, etc.), the base station may indicate to the terminal the SRS resources of SRS resource set 0 and the SRS resources of SRS resource set 1, respectively. Additionally, through two PMI fields (i.e., the first TPMI field and the second TPMI field) in the corresponding UL scheduling DCI, the base station can instruct the terminal which PMI to apply to the SRS resources of SRS resource set 0 and which PMI to apply to the SRS resources of SRS resource set 1, respectively.

[0286] Additionally, the base station can use the SRS resource set selection field in the UL scheduling DCI to indicate to the terminal whether the transmission is STRP or STxMP transmission. In this case, in the case of STRP transmission, the base station can use one SRI field and one TPMI field to indicate to the terminal the SRS resources and TPMI for one panel (i.e., one SRS resource set). On the other hand, in the case of STxMP transmission, the base station can use two SRI fields and two TPMI fields to indicate to the terminal the SRS resources and TPMI for two panels (i.e., two SRS resource sets).

[0287] For clarity of explanation, in this embodiment, the case where the terminal has four (shared) digital ports and a four-port SRS resource is set for each panel (hereinafter, Embodiment 1-1) and the case where the terminal has two (shared) digital ports and a two-port SRS resource is set for each panel (hereinafter, Embodiment 1-2) are explained separately, but this is only an example and the proposed method applied to the present disclosure is the same / similar.

[0288] Additionally, the method described in the present disclosure can be extended and applied to terminals having different numbers of (shared) digital ports and to cases where SRS resources having different numbers of ports are set for each panel of the terminal.

[0289] Example 1-1

[0290] This embodiment relates to a method of indicating and applying PMI when a terminal has four (shared) digital ports and a four-port SRS resource is set for each panel.

[0291] In the above-described operation, when STxMP transmission is indicated, since each panel can only use two digital ports out of four digital ports, the terminal must use only PMIs for which at least two antenna ports have zero values ​​among the 4-Tx PMIs (i.e., PMIs for 4-port transmission) for each panel. In other words, only PMI vectors / matrices for which at least two rows have zero values ​​need to be used.

[0292] For example, if the transmission rank of a specific panel is 1, the PMI can be set / indicated for that panel using the rank 1 codebook.

[0293] Table 6 illustrates a 4-Tx codebook for transmission rank 1.

[0294]

[0295] Referring to Table 6, Entries (i.e., TPMI indices) 0 to 3 may be codebooks for non-coherent transmission, Entries 4 to 11 may be codebooks for partial coherent transmission, and Entries 12 to 27 may be codebooks for full coherent transmission.

[0296] At this time, considering the aforementioned condition, that is, a PMI vector / matrix with at least two rows having a value of 0, the available TPMI indices can be limited to {0 to 11}. That is, the available PMI set is all PMIs from TPMI index 0 to TPMI index 11, and may be PMIs excluding full coherent PMI.

[0297] Additionally or alternatively, as illustrated in FIG. 8 (particularly, FIG. 8(b)), the set of PMIs available for each panel may be determined / selected / restricted considering the different characteristics of the digital ports used in the two panels. For example, the set of PMIs available for a first panel (e.g., Panel 0) may be the PMIs having 0 values ​​in the 2nd and 4th rows (i.e., TPMI indices = {0, 2, 4, 5, 6, 7}), and the set of PMIs available for a second panel (e.g., Panel 1) may be the PMIs having 0 values ​​in the 1st and 3rd rows (i.e., TPMI indices = {1, 3, 8, 9, 10, 11}).

[0298] Additionally or alternatively, since the SRS resources are already separated for the two panels (i.e., separate SRS resources are set for each set of SRS resources), the set of PMIs available for both panels may be restricted to TPMI indices = {0, 2, 4, 5, 6, 7}.

[0299] If a particular panel has non-coherent properties (i.e., the ports used by the panel cannot be phase-aligned), the set of PMIs available for the panel can be further restricted to TPMI indices = {0 to 3}. That is, with respect to the aforementioned PMI set determination, only the intersection with TPMI indices = {0 to 3} can be used.

[0300] For another example, if the transmission rank of a particular panel is 2, the PMI can be set / indicated for that panel using a rank 2 codebook.

[0301] Table 7 illustrates a 4-Tx codebook for transmission rank 2.

[0302]

[0303] Referring to Table 7, entries (i.e., TPMI indices) 0 to 5 may be codebooks for non-coherent transmission, entries 8 to 13 may be codebooks for partial coherent transmission, and entries 14 to 21 may be codebooks for full coherent transmission.

[0304] At this time, considering the aforementioned condition, that is, a PMI vector / matrix with at least two rows having a value of 0, the available TPMI indices can be restricted to {0 to 5}. That is, the available PMI set can be non-coherent PMIs from TPMI index 0 to TPMI index 5.

[0305] Additionally or alternatively, as illustrated in FIG. 8 (in particular, FIG. 8(b)), the set of PMIs available for each panel may be determined / selected / limited, taking into account the different characteristics of the digital ports used in the two panels.

[0306] For example, the set of PMIs available for a first panel (e.g., Panel 0) may be those PMIs that have 0 values ​​in the 2nd and 4th rows (i.e., TPMI index = {1}), and the set of PMIs available for a second panel (e.g., Panel 1) may be those PMIs that have 0 values ​​in the 1st and 3rd rows (i.e., TPMI index = {4}). Conversely, the set of PMIs available for a first panel (e.g., Panel 0) may be those PMIs that have 0 values ​​in the 1st and 3rd rows (i.e., TPMI index = {4}), and the set of PMIs available for a second panel (e.g., Panel 1) may be those PMIs that have 0 values ​​in the 2nd and 4th rows (i.e., TPMI index = {1}).

[0307] For another example, the set of PMIs available for a first panel (e.g., Panel 0) may be those PMIs that have 0 values ​​in the 1st and 4th rows (i.e., TPMI index = {3}), and the set of PMIs available for a second panel (e.g., Panel 1) may be those PMIs that have 0 values ​​in the 2nd and 3rd rows (i.e., TPMI index = {2}). Conversely, the set of PMIs available for a first panel (e.g., Panel 0) may be those PMIs that have 0 values ​​in the 2nd and 3rd rows (i.e., TPMI index = {2}), and the set of PMIs available for a second panel (e.g., Panel 1) may be those PMIs that have 0 values ​​in the 1st and 4th rows (i.e., TPMI index = {3}).

[0308] As another example, the set of PMIs available for a first panel (e.g., Panel 0) may be those PMIs that have 0 values ​​in the 1st and 2nd rows (i.e., TPMI index = {5}), and the set of PMIs available for a second panel (e.g., Panel 1) may be those PMIs that have 0 values ​​in the 3rd and 4th rows (i.e., TPMI index = {0}). Conversely, the set of PMIs available for a first panel (e.g., Panel 0) may be those PMIs that have 0 values ​​in the 3rd and 4th rows (i.e., TPMI index = {0}), and the set of PMIs available for a second panel (e.g., Panel 1) may be those PMIs that have 0 values ​​in the 1st and 2nd rows (i.e., TPMI index = {5}).

[0309] In this regard, the aforementioned PMI set, i.e., the PMIs corresponding to TPMI index = {0 to 5}, may be limited in terms of beamforming gain since they form a beam using only one port per layer.

[0310] Taking these points into account, the following PMIs can be additionally defined based on the PMIs exemplified in Table 7, and the additionally defined PMIs can be included in the set of available PMIs.

[0311] For example, an additional PMI can be defined by replacing the values ​​in the second and fourth rows with 0 in the PMI corresponding to TPMI indices {14, 15}. The PMI defined by this method forms a different beam from the PMIs corresponding to TPMI indices = {0 to 5}, and also satisfies the condition that two rows have 0 values, so it can be applied to STxMP transmission. Similarly, an additional PMI can be defined by applying this method to other PMIs. For example, the same result can be obtained by applying this method to TPMI indices {16, 17}, TPMI indices {18, 19}, or TPMI indices {20, 21}.

[0312] For another example, an additional PMI can be defined by replacing the values ​​in the 1st and 3rd rows with 0 values ​​in the PMI corresponding to TPMI indices {14, 15}. The PMI defined by this method forms a different beam from the PMIs corresponding to TPMI indices = {0 to 5}, and also satisfies the condition that two rows have 0 values, so it can be applied to STxMP transmission. Similarly, additional PMIs can be defined by applying this method to other PMIs. For example, the same result can be obtained by applying this method to TPMI indices {16, 17}, TPMI indices {18, 19}, or TPMI indices {20, 21}.

[0313] As another example, an additional PMI can be defined by replacing the values ​​in the 1st and 4th rows of the PMI corresponding to TPMI indices {14, 15} with 0 values. The PMI defined by this method forms a different beam from the PMIs corresponding to TPMI indices = {0 to 5}, and also satisfies the condition that two rows have 0 values, so it can be applied to STxMP transmission. Similarly, additional PMIs can be defined by applying this method to other PMIs. For example, the same result can be obtained by applying this method to TPMI indices {16, 17}, TPMI indices {18, 19}, or TPMI indices {20, 21}.

[0314] As another example, an additional PMI can be defined by replacing the values ​​in the second and third rows of the PMI corresponding to TPMI indices {14, 15} with 0 values. The PMI defined by this method forms a different beam from the PMIs corresponding to TPMI indices = {0 to 5}, and also satisfies the condition that two rows have 0 values, so it can be applied to STxMP transmission. Similarly, additional PMIs can be defined by applying this method to other PMIs. For example, the same result can be obtained by applying this method to TPMI indices {16, 17}, TPMI indices {18, 19}, or TPMI indices {20, 21}.

[0315] As another example, an additional PMI can be defined by replacing the values ​​in the 2nd and 4th rows with 0 values ​​in the PMI corresponding to the TPMI index {14, 15}. An additional PMI can be defined by replacing the values ​​in the 1st and 3rd rows with 0 values ​​in the PMI corresponding to the TPMI index {16, 17}. An additional PMI can be defined by replacing the values ​​in the 1st and 4th rows with 0 values ​​in the PMI corresponding to the TPMI index {18, 19}. An additional PMI can be defined by replacing the values ​​in the 2nd and 3rd rows with 0 values ​​in the PMI corresponding to the TPMI index {20, 21}. In this way, in addition to the PMIs corresponding to the TPMI index = {0 to 5}, PMIs corresponding to the TPMI index = {14 to 21} can be additionally utilized.

[0316] Additionally or alternatively, the set of PMIs available for each panel may be determined / selected / limited, taking into account the different characteristics of the digital ports used in the two panels, as illustrated in FIG. 8 (in particular, FIG. 8(b)).

[0317] For example, if a PMI is selected / indicated for the first panel (e.g., Panel 0) in which the values ​​in the 2nd and 4th rows are replaced with 0 values, then a PMI in which the values ​​in the 1st and 3rd rows are replaced with 0 values ​​should be selected / indicated for the second panel (e.g., Panel 1). Conversely, if a PMI in which the values ​​in the 1st and 3rd rows are replaced with 0 values ​​for the first panel (e.g., Panel 0) in which the values ​​in the 2nd and 4th rows are replaced with 0 values ​​should be selected / indicated for the second panel (e.g., Panel 1).

[0318] For another example, if a PMI is selected / indicated for the first panel (e.g., Panel 0) in which the values ​​in the 1st and 4th rows are replaced with 0 values, then a PMI in which the values ​​in the 2nd and 3rd rows are replaced with 0 values ​​should be selected / indicated for the second panel (e.g., Panel 1). Conversely, if a PMI in which the values ​​in the 2nd and 3rd rows are replaced with 0 values ​​for the first panel (e.g., Panel 0) in which the values ​​in the 1st and 4th rows are replaced with 0 values ​​should be selected / indicated for the second panel (e.g., Panel 1).

[0319] Regarding the method of defining additional PMI as described above, if the values ​​in two out of four rows are replaced with 0, the power normalization of the corresponding PMI needs to be changed. For example, in the case of the existing PMI, the norm of the PMI matrix is ​​normalized to 1, and to maintain this, the additional PMI needs to be multiplied by a value of 1 / 2 instead of the existing 1 / (2*root(2)) to normalize the norm of the PMI matrix to 1.

[0320] Example 1-2

[0321] This embodiment relates to a method of indicating and applying PMI when a terminal has two (shared) digital ports and a 2-port SRS resource is set for each panel.

[0322] In the above-described operation, when STxMP transmission is indicated, since each panel can use only one digital port out of two digital ports, the terminal must use only the PMI for which one antenna port has a zero value among the 2-Tx PMI (i.e., PMI for 2-port transmission) for each panel. In other words, only the PMI vector / matrix with one row having a zero value needs to be used.

[0323] For example, if the transmission rank of a specific panel is 1, the PMI can be set / indicated for that panel using the rank 1 codebook.

[0324] Table 8 illustrates a 2-Tx codebook for transmission rank 1.

[0325]

[0326] Referring to Table 8, given the aforementioned condition, i.e., a PMI vector / matrix with one row equal to 0, the available TPMI indices can be restricted to {0, 1}. That is, the available PMI set can be non-coherent PMIs corresponding to TPMI index 0 and TPMI index 1.

[0327] Additionally or alternatively, as illustrated in FIG. 8 (in particular, FIG. 8(b)), the set of PMIs available for each panel may be determined / selected / limited, taking into account the different characteristics of the digital ports used in the two panels.

[0328] For example, if a PMI corresponding to TPMI index {0} is selected / indicated for the first panel (e.g., Panel 0), a PMI corresponding to TPMI index {1} should be selected / indicated for the second panel (e.g., Panel 1). Conversely, if a PMI corresponding to TPMI index {1} is selected / indicated for the first panel (e.g., Panel 0), a PMI corresponding to TPMI index {0} should be selected / indicated for the second panel (e.g., Panel 1).

[0329] In this regard, since each panel utilizes only one digital port, only rank 1-based transmission can be possible on each panel (i.e., only rank 1-based transmission can be configured for each set of SRS resources).

[0330] In relation to the methods proposed in this embodiment, the terminal reports information about which PMI(s) to use (i.e., information about the set of available PMIs) to the base station, and the base station can indicate a PMI only within the corresponding PMI(s) (i.e., the set of available PMIs).

[0331] The above-described operation allows only a subset of pre-defined PMIs to be used for STxMP transmission, thereby reducing the size of the PMI field in the DCI (i.e., PMI payload). For example, if only four 4-port PMIs out of a total of 16 4-port PMIs are available for STxMP transmission, the number of bits for the PMI indication for the corresponding panel, i.e., the corresponding SRS resource set, can be reduced from 4 bits to 2 bits.

[0332] Additionally or alternatively, as another method for solving the problem in the aforementioned embodiment 1-1, a method of using a 4-Tx codebook (i.e., a 4-port based codebook) for STRP transmission and a 2-Tx codebook (i.e., a 2-port based codebook) for STxMP transmission may be applied.

[0333] For example, even if a 4-port SRS resource is indicated through the SRI field, a PMI corresponding to a 2-port based codebook may be indicated in the case of STxMP transmission. In this case, which two ports among the four ports for SRS transmission are used to apply the 2-port based codebook may be determined by a specific rule, or may be preset / defined by the base station to the terminal (or by the terminal to the base station). For example, with respect to a specific rule, the first and third SRS ports may be used for one SRS resource set (e.g., SRS resource set 0), and the second and fourth SRS ports may be used for another SRS resource set (e.g., SRS resource set 1). Alternatively, the first SRS port and the second SRS port may be used for one SRS resource set (e.g., SRS resource set 0), and the third SRS port and the fourth SRS port may be used for another SRS resource set (e.g., SRS resource set 1).

[0334] This method can be applied in the same / similar manner to Embodiment 1-2. That is, when 2-port SRS resources are set / indicated, a 2-Tx codebook (i.e., a 2-port based codebook) can be used for STRP transmission, and a 4-Tx codebook (i.e., a 4-port based codebook) can be used for STxMP transmission. In this regard, the 1-Tx codebook, i.e., the 1-port based codebook, can be fixed to [1].

[0335] In relation to the methods proposed in this embodiment, the set of PMIs (e.g., PMI subsets) available to the terminal for STRP transmission and the set of PMIs available to the terminal for STxMP transmission may be different. Therefore, the terminal may be configured / defined to report codebook coherency capability information applied to STRP transmission and codebook coherency capability information applied to STxMP transmission separately. For example, the codebook coherency capability information may be coherency information of a codebook related to PUSCH transmission (e.g., a combination of non-coherent / partial coherent / full coherent). Specifically, when transmitting STxMP, the terminal may separately report full / partial / non-coherent capability information for each panel / TRP / SRS resource (set) / PMI. This method may be suitable for a case where multiple panels have different implementations / capabilities, i.e., an asymmetric panel implementation.

[0336] For example, a terminal considered in the present disclosure (i.e., a terminal that supports a scheme in which M panels share N ports (e.g., digital ports)) may report full / partial / non-coherent capability as capability information for STRP transmission (i.e., non-STxMP transmission) and partial / non-coherent capability as capability information for STxMP transmission. Additionally, during STxMP transmission, depending on the transmission rank of each panel, partial / non-coherent capability may be applied in rank 1, and non-coherent capability may be applied in rank 2. That is, the capability information reported by the terminal for each rank may be applied as is, or a subset of the capability information may be applied. Alternatively, during STxMP transmission, the terminal may report partial / non-coherent capability, but may also report coherency information by distinguishing it for each rank.

[0337] For another example, if a terminal supports a scheme where each panel has an independent port (e.g., digital port) instead of a scheme where M panels share N ports (e.g., digital ports) (i.e., a shared digital port architecture), the terminal may report full / partial / non-coherent capability as capability information for STRP transmission (i.e., non-STxMP transmission) and full partial / non-coherent capability as capability information for STxMP transmission.

[0338] Additionally, with respect to UL codebook subset restriction (CBSR), the base station may separately set / instruct the terminal (taking into account the capability information of the terminal described above) CBSR information for STRP transmission (i.e., non-STxMP transmission) and CBSR information (for each panel) for STxMP transmission. For example, for the terminal considered in the present disclosure (i.e., the terminal supporting the method in which M panels share N ports (e.g., digital ports)), the base station may set full-partial-non-coherent TPMI as the CBSR information for STRP transmission (i.e., non-STxMP transmission) and partial-non-coherent TPMI as the CBSR information for STxMP transmission. Additionally, for STxMP transmission, the partial-non-coherent TPMI may be set in rank 1, and the non-coherent TMPI may be set in rank 2.

[0339] Example 2

[0340] This embodiment is about a method of applying full power Tx mode, considering a case where a terminal supports a method in which M panels share N ports (e.g., digital ports) (i.e., a shared digital port structure).

[0341] With respect to the general full power transmission mode, full power Tx mode 1 (hereinafter referred to as the first mode) or full power Tx mode 2 (hereinafter referred to as the second mode) may be set for the terminal. Here, the first mode may be a mode in which the terminal reports / informs to the base station information about a coherency TPMI that can be supported beyond its capability information in order to support full power transmission, even if the coherency TPMI does not fall within the coherency TPMI that the terminal reported as its capability information. The second mode may be a mode in which the terminal reports / informs to the base station information about a TPMI that can support full power transmission among the TPMIs that the terminal reported as its capability information.

[0342] Hereinafter, one or more of the methods for setting / applying the first mode or the second mode described above (hereinafter, Examples 2-1 to 2-3) may be applied to the terminal considered in the present disclosure.

[0343] Example 2-1

[0344] A rule may be defined that the base station does not set the first mode to the corresponding terminal.

[0345] This may be because all PMIs added in Mode 1 transmit PUSCHs using all antenna ports (i.e., SRS ports). In other words, PMIs added in Mode 1 may be suitable for a structure having independent digital ports for each panel, rather than a shared digital port structure.

[0346] Example 2-2

[0347] The base station can set the first mode to the terminal, but a new PMI for the first mode, other than the existing PMI for the first mode, can be additionally defined.

[0348] For example, for a 4-port non-coherent PMI based on rank 1, two rows have zero values ​​and the remaining two rows have non-zero values ​​(e.g., [1 1 0 0]). T , [1 0 1 0] T , [0 1 0 1] T , [0 0 1 1] T ) can be considered for use by additionally defining it.

[0349] Example 2-3

[0350] The base station can set the second mode for the terminal.

[0351] For clarity of explanation, the four shared digital ports illustrated in Fig. 8 are named digital ports 0, 1, 2, and 3, respectively. Additionally, it is assumed that the 4-port SRS resources set in SRS resource set 0 corresponding to Panel 0 are transmitted using digital ports 0, 1, 2, and 3, and the 4-port SRS resources set in SRS resource set 1 corresponding to Panel 1 are transmitted using digital ports 0, 1, 2, and 3.

[0352] Additionally, with respect to the method described in this embodiment, for STRP transmission, all of digital ports 0, 1, 2, and 3 may be used by Panel 0, or all of digital ports 0, 1, 2, and 3 may be used by Panel 1. On the other hand, for STxMP transmission, it is assumed that digital ports 0, 1 are used by Panel 0, and digital ports 2, 3 are used by Panel 1.

[0353] Additionally, with respect to the method described in this embodiment, the maximum transmission power limit (max Tx power limit) of the terminal is defined differently depending on the power class of the terminal (UE power class), and for convenience of explanation, 23 dBm is assumed as the power limit. That is, whether full power transmission as described in this disclosure is performed can be determined based on 23 dBM.

[0354] Considering the above assumptions, depending on the power amplifier (PA) combination of each digital port, only some of the pre-defined PMIs are capable of full power transmission.

[0355] For example, Table 9 illustrates PA combinations associated with digital ports 0, 1, 2, and 3.

[0356] Digital Port 0Digital Port 1Digital Port 2Digital Port 3PA Combination 117 dBm17 dBm17 dBm17 dBmPA Combination 220 dBm17 dBm20 dBm17 dBmPA Combination 323 dBm17 dBm23 dBm17 dBmPA Combination 420 dBm20 dBm20 dBm20 dBm20 dBmPA Combination 523 dBm20 dBm23 dBm20 dBmPA Combination 623 dBm23 dBm23 dBm23 dBm

[0357] Referring to Table 9, for PA combination 1, since two digital ports can be used for STxMP transmission, the maximum transmission power of one panel can be 20 dBm, and since all digital ports can be used for STRP transmission, the maximum transmission power of one panel can be 23 dBm.

[0358] For terminals supporting STxMP, depending on the implementation, either a per-panel max tx power limit (i.e., up to 23 dBm can be transmitted per panel) or an across-panel max tx power limit (i.e., the sum of the transmission power of two panels can be up to 23 dBm) may be applied. In this case, for PA combination 1, since the sum of the maximum outputs of all digital ports is 23 dBm (= 17 dBm + 17 dBm + 17 dBm + 17 dBm), the across-panel max tx power limit may be applied. On the other hand, for PA combinations 2, 3, 4, 5, and 6, either the across-panel max tx power limit or the per-panel max tx power limit may be applied because the sum of the maximum outputs of all digital ports exceeds 23 dBm.

[0359] Below, for each PA combination, the PMI that can be transmitted at full power (i.e., 23 dBm transmission power) in terms of each panel (i.e., each SRS resource set) during STxMP transmission is described.

[0360] For PA combination 1, the maximum power of one panel when transmitting STxMP is 20 dBm (=17 dBm + 17 dBm), so there is no PMI that can be transmitted at full power on each panel side.

[0361] For PA combination 2, the maximum power of one panel when transmitting STxMP is 21.77 dBm (=20 dBm + 17 dBm), so there is no PMI that can be transmitted at full power on each panel side.

[0362] For PA combination 3, the maximum power of one panel during STxMP transmission is 24.96 dBm (=23 dBm + 17 dBm). Therefore, the PMI that can be transmitted at full power on each panel side can be as follows. For example, the PMI that can be transmitted at full power on Panel 0 can include PMI where any two rows (e.g., the 1st and 2nd rows) have non-zero values ​​and the remaining rows have zero values, or PMI where any one row (e.g., the 1st row) has non-zero values ​​and the remaining rows have zero values. At this time, the PMI that can be transmitted at full power in Panel 1 can include PMI where any two rows (e.g., the third and fourth rows) are non-zero values ​​and the remaining rows are zero values, or PMI where any one row (e.g., the third row) is non-zero values ​​and the remaining rows are zero values.

[0363] For PA combination 4, the maximum power of one panel during STxMP transmission is 23 dBm (= 20 dBm + 20 dBm). Therefore, the PMI that can be transmitted at full power on each panel side can be as follows. For example, the PMI that can be transmitted at full power on Panel 0 can include PMI that is non-zero value for any two rows (e.g., the 1st row and the 2nd row) and 0 value for the remaining rows. At this time, the PMI that can be transmitted at full power on Panel 1 can include PMI that is non-zero value for any two rows (e.g., the 3rd row and the 4th row) and 0 value for the remaining rows.

[0364] For PA combination 5, the PMI that can be transmitted at full power is the same as for PA combination 3.

[0365] For PA combination 6, the PMI that can be transmitted at full power on each panel side can be as follows. For example, the PMI that can be transmitted at full power on Panel 0 can include PMI where any two rows (e.g., row 1 and row 2) have non-zero values ​​and the remaining rows have zero values, PMI where any one row (e.g., row 1) has non-zero values ​​and the remaining rows have zero values, PMI where any one row (e.g., row 2) has non-zero values ​​and the remaining rows have zero values. At this time, the PMI that can be transmitted at full power in Panel 1 can include PMI where any two rows (e.g., the 3rd and 4th rows) are non-zero values ​​and the remaining rows are 0 values, PMI where any one row (e.g., the 3rd row) is non-zero values ​​and the remaining rows are 0 values, PMI where any one row (e.g., the 4th row) is non-zero values ​​and the remaining rows are 0 values.

[0366] With respect to the full power transmission method described in this embodiment, in a structure where M panels share N ports (e.g., digital ports) (i.e., a structure with shared digital ports), in the case of the second mode, the set of PMIs that can support full power mode / transmission during STRP transmission and the set of PMIs that can support full power mode / transmission during STxMP transmission may be different from each other. Therefore, the terminal may need to distinguish the PMI sets and report them to the base station.

[0367] Additionally or alternatively, even for STxMP transmission, the set of PMIs that can support full power mode / transmission may differ depending on whether the terminal supports a structure in which M panels share N ports (e.g., digital ports) (i.e., a shared digital port structure) or a structure in which each panel has an independent digital port (i.e., a per-panel digital port structure). Therefore, the terminal may need to distinguish the set of PMIs and report it to the base station.

[0368] Additionally or alternatively, the terminal may report information on whether it is capable of operating in the first and second modes related to full power transmission as terminal capability information, distinguishing between non-STxMP transmission (i.e., STRP transmission, single panel transmission) and STxMP transmission. More specifically, the capability information may be defined per panel in the case of STxMP transmission. For example, the terminal considered in the present disclosure (i.e., a terminal supporting a scheme in which M panels share N ports (e.g., digital ports)) may be capable of operating in the first mode in the case of non-STxMP transmission. On the other hand, in the case of STxMP transmission, the terminal may not be able to operate in the first mode because it must perform PUSCH transmission using only some ports of a 4-port SRS resource.

[0369] In this regard, the base station can set a full power transmission mode to be applied to non-STxMP transmission and a full power transmission mode to be applied to STxMP transmission (taking into account the capability information of the terminal described above) to the terminal.

[0370] In the case of a PMI capable of supporting full power transmission as described above in the present disclosure, the PUSCH power scaling factor may be applied by replacing "# of non-zero PUSCH ports / max # of SRS ports supported by UE" with '1'. Here, "# of non-zero PUSCH ports" represents the number of non-zero PUSCH ports, and "max # of SRS ports supported by UE" represents the maximum number of SRS ports supported by the UE. On the other hand, in the case of a PMI that does not support full power transmission, the PUSCH power scaling factor may be applied as "# of non-zero PUSCH ports / max # of SRS ports supported by UE," and scaling may be applied using "# of non-zero PUSCH ports" and "max # of SRS ports supported by UE" applied to each panel.

[0371] Additionally or alternatively, in relation to the full power transmission described above in the present disclosure, to support the second mode, SRS resources with different numbers of ports may be configured in a single panel, i.e., a single SRS resource set. In this case, full power transmission may be enabled by selecting a single SRS resource via the SRI field.

[0372] For example, in addition to a 4-port SRS resource in SRS resource set 0, a 1-port SRS resource connected to both digital ports 0 and 1 may be configured, and full power transmission may be performed / supported through the corresponding SRS port in Panel 0. As a specific example, in the case of PA combination 4 in Table 9, the 1-port SRS resource configured in this way may be capable of transmitting up to 23 dBm. In another example, in addition to a 4-port SRS resource in SRS resource set 0, a 2-port SRS resource connected to both digital ports 0 and 1 may be configured. In this case, SRS port 0 may be connected to both digital ports 0 and 1, and SRS port 1 may not be connected to a digital port. If a precoder [1, 0] is applied through the corresponding SRS port in Panel 0, full power transmission may be performed / supported. As a specific example, for PA combination 4 in Table 9, the 2-port SRS resource configured in this way can transmit up to 23 dBm.

[0373] Example 3

[0374] This embodiment considers a case where a terminal supports a method in which M panels share N ports (e.g., digital ports) (i.e., a shared digital port structure), and is about PMI instructions and application methods based on different numbers of SRS ports.

[0375] In the case of the aforementioned embodiment 1, it is assumed that the number of SRS ports to which PMI is applied is the same for STRP transmission and STxMP transmission. Based on this, in the case of STxMP transmission, only some of the SRS ports, i.e., some of the rows constituting the PMI vector / matrix, to which the PMI having a value of 0 applied can be included in the set of PMIs available to the terminal.

[0376] In contrast, in this embodiment, a method is described for performing an operation similar to the operation described in Embodiment 1 by setting the number of ports of SRS resources used for STRP transmission and the number of ports of SRS resources used for STxMP transmission differently from each other.

[0377] For clarity of explanation, this embodiment is explained separately for the case where the terminal has four (shared) digital ports (hereinafter, embodiment 3-1) and the case where the terminal has two (shared) digital ports (hereinafter, embodiment 3-2), but this is only an example and the proposed method applied to the present disclosure is the same / similar.

[0378] Additionally, the method described in the present disclosure can be extended and applied to terminals having different numbers of (shared) digital ports.

[0379] Example 3-1

[0380] This embodiment describes a method for indicating and applying PMI when a terminal has four (shared) digital ports.

[0381] For example, for each of SRS resource set 0 and SRS resource set 1, 4-port SRS resource(s) for STRP transmission may be configured, and 2-port SRS resource(s) for STxMP transmission may be configured. At this time, the 2-port SRS resource configured in SRS resource set 0 may use 2 out of 4 digital ports, and the 2-port SRS resource configured in SRS resource set 1 may use the remaining 2 out of 4 digital ports. The 4-port SRS resource configured in SRS resource set 0 and SRS resource set 1 may use all 4 digital ports.

[0382] In this regard, for STRP transmission, the base station may indicate a 4-port SRS resource in SRS resource set 0 or SRS resource set 1 through the SRI field, and indicate a 4-port-based PMI to be applied to the corresponding SRS resource set through the TPMI field.

[0383] In contrast, for STxMP transmission, the base station can indicate 2-port SRS resources in SRS resource set 0 and SRS resource set 1, respectively (using two SRI fields). Additionally, the base station can indicate 2-port-based PMI to be applied to SRS resource set 0 and SRS resource set 1, respectively, through two TPMI fields. That is, since the base station indicates the number of SRS ports by reducing the number of digital ports per panel (i.e., 2) used for STxMP transmission, the terminal can use the PMI corresponding to the number of SRS ports as is.

[0384] Example 3-2

[0385] This embodiment describes a method for indicating and applying PMI when a terminal has two (shared) digital ports.

[0386] For example, for each of SRS resource set 0 and SRS resource set 1, 2-port SRS resource(s) for STRP transmission may be configured, and 1-port SRS resource(s) for STxMP transmission may be configured. At this time, the 1-port SRS resource configured in SRS resource set 0 may use one of the two digital ports, and the 1-port SRS resource configured in SRS resource set 1 may use the other one of the two digital ports. The 2-port SRS resources configured in SRS resource set 0 and SRS resource set 1 may use both digital ports.

[0387] In this regard, for STRP transmission, the base station may indicate a 2-port SRS resource in SRS resource set 0 or SRS resource set 1 through the SRI field, and indicate a 2-port-based PMI to be applied to the corresponding SRS resource set through the TPMI field.

[0388] In contrast, for STxMP transmission, the base station can indicate 1-port SRS resources in SRS resource set 0 and SRS resource set 1, respectively (using two SRI fields). Additionally, the base station can indicate 1-port-based PMI to be applied to SRS resource set 0 and SRS resource set 1, respectively, through two TPMI fields. That is, since the base station indicates the number of SRS ports by the number of digital ports per panel used for STxMP transmission (i.e., 1), the terminal can use the PMI corresponding to the corresponding number of SRS ports as is.

[0389] Additionally, with respect to the method proposed in the present embodiment, the terminal can report information on the (maximum) number of SRS ports to the base station as capability information of the terminal by distinguishing between the cases of non-STxMP transmission (i.e., STRP transmission, single panel transmission) and STxMP transmission. For example, in the case of the terminal considered in the present disclosure (i.e., a terminal supporting a structure in which M panels share N ports (e.g., digital ports), i.e., a shared digital port structure), the terminal can support up to 4-port SRS using all 4 digital ports for non-STxMP transmission, but can support up to 2-port SRS using 2 digital ports for STxMP transmission. More specifically, the capability information can be defined for each panel in the case of STxMP transmission.

[0390] In this regard, the base station can distinguish between SRS resources to be applied in non-STxMP transmission (e.g., 4-port SRS resources) and SRS resources to be applied in STxMP transmission (e.g., 2-port SRS resources) and set them for the terminal (taking into account the capability information of the terminal described above).

[0391] The embodiments of the present disclosure are distinguished only for the sake of clarity of explanation, and the configuration of one embodiment may be applied in combination / combination / replacement with the configuration of another embodiment.

[0392] Additionally, the parameters, information, information on whether the proposed method is applicable, etc. described in the embodiments of the present disclosure may be set / instructed to the terminal by the base station, transmitted / reported to the base station by the terminal, or set to a predefined / fixed value.

[0393] Hereinafter, the operation of the terminal and base station according to the embodiments of the present disclosure described above will be described with reference to FIGS. 9 and 10.

[0394] FIG. 9 is a diagram illustrating the operation of a terminal for a method of performing uplink transmission according to an embodiment of the present disclosure.

[0395] FIG. 9 illustrates an operation of a terminal based on the previously proposed methods (e.g., any one of Embodiments 1 to 3 and their detailed embodiments, or a combination of one or more (detailed) embodiments). The example of FIG. 9 is for convenience of explanation and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 9 may be omitted depending on the situation and / or setting. In addition, the terminal in FIG. 9 is only an example and may be implemented as a device illustrated in FIG. 11 below. For example, the processor (102 / 202) of FIG. 11 may control the transceiver (106 / 206) to transmit and receive channels / signals / data / information, etc., and may also control the processor (102 / 202) of FIG. 11 to store transmitted or received channels / signals / data / information, etc. in the memory (104 / 204).

[0396] Additionally, the operation of FIG. 9 may be processed by one or more processors (102, 202) of FIG. 11, and the operation of FIG. 9 may be stored in a memory (e.g., one or more memories (104, 204) of FIG. 11) in the form of a command / program (e.g., an instruction, an executable code) for driving at least one processor (e.g., 102, 202) of FIG. 11.

[0397] In step S910, the terminal may report capability information related to full power transmission to the base station.

[0398] In this regard, when reporting the corresponding capability information, the terminal may separately report information on the STRP transmission method (i.e., non-STxMP transmission, single panel transmission, etc.) and information on the STxMP transmission method.

[0399] For example, the capability information may include information about a first set of precoding matrices for full power transmission of a data channel (e.g., PUSCH) and information about a second set of precoding matrices. In this case, the first set of precoding matrices may be related to a first uplink transmission scheme (e.g., STRP transmission scheme) based on one set of sounding reference signal (SRS) resources, and the second set of precoding matrices may be related to a second uplink transmission scheme (e.g., STxMP transmission scheme) based on at least two sets of SRS resources.

[0400] In step S920, the terminal may receive control information (e.g., DCI) including information (e.g., PMI by TPMI field) regarding at least one precoding matrix for a data channel (e.g., PUSCH). Thereafter, in step S930, the terminal may transmit the data channel based on the at least one precoding matrix.

[0401] For example, the control information may further include indication information indicating a first uplink transmission scheme or a second uplink transmission scheme. If the indication information indicates the first uplink transmission scheme and the data channel is transmitted with full power transmission, one precoding matrix indicated by the control information may be included in the first precoding matrix set. Alternatively, if the indication information indicates the second uplink transmission scheme and the data channel is transmitted with full power transmission, at least two precoding matrices indicated by the control information may be included in the second precoding matrix set.

[0402] As described above in the present disclosure, in the case of a terminal supporting a shared digital port structure, i.e., a structure in which M panels share N ports (e.g., digital ports), a rule may be newly defined in which the settings for pre-defined operating modes (e.g., full power mode 1, full power mode 2) for full power transmission are partially restricted.

[0403] For example, if a terminal supports a scheme in which M SRS resource sets (i.e., M panels) share N ports, for the full power transmission, the first operation mode (e.g., full power mode 1) and the second operation mode (e.g., full power mode 2) pre-defined, the first operation mode and the second operation mode may be defined to be configurable to the terminal by the base station for the first uplink transmission scheme. On the other hand, for the second uplink transmission scheme, only the second operation mode may be defined to be configurable to the terminal by the base station.

[0404] In this regard, when the terminal is set to a specific operation mode (e.g., full power mode 1) among the pre-defined operation modes for the full power transmission, a precoding matrix additionally available to the terminal for the specific operation mode may be configured differently depending on whether it is based on the first uplink transmission method or the second uplink transmission method. For example, the precoding matrix additionally available to the terminal may mean a precoding matrix additionally available for full power transmission among the precoding matrices that the terminal has not reported to the base station as available.

[0405] Additionally or alternatively, for a precoding matrix that does not support the full power transmission among the precoding matrices associated with the second uplink transmission scheme, a power scaling factor for transmission of a data channel (e.g., PUSCH) may correspond to a value obtained by dividing the number of non-zero data channel ports by the maximum number of SRS ports supported by the terminal. In this case, when at least two SRS resource sets are configured for the second uplink transmission scheme, the power scaling factor for transmission of the data channel may be calculated for each SRS resource set (i.e., for each panel).

[0406] Additionally, for a terminal supporting a shared digital port structure, i.e., a structure in which M panels share N ports (e.g., digital ports) as described above in the present disclosure, a rule can be newly defined that restricts the use of only some of the pre-defined precoding matrices for transmission based on a plurality of SRS resource sets (e.g., STxMP transmission).

[0407] For example, when the first SRS resource set and the second SRS resource set for the aforementioned second uplink transmission method are indicated by control information, the index of a row having a non-zero value among the rows of the precoding matrix for the first SRS resource set can be defined / set / indicated so as not to overlap with the index of a row having a non-zero value among the rows of the precoding matrix for the second SRS resource set.

[0408] Additionally, when considering one of the pre-defined operation modes for full power transmission (e.g., full power mode 2), the first set of precoding matrices described above may be included in a third set of precoding matrices available to the terminal for the first uplink transmission scheme, and the second set of precoding matrices may be included in a fourth set of precoding matrices available to the terminal for the second uplink transmission scheme.

[0409] In this regard, when the first SRS resource set and the second SRS resource set are set for the second uplink transmission method, for the fourth precoding matrix set, the index of a row having a non-zero value among the rows of the precoding matrix for the first SRS resource set may be defined / set / indicated so as not to overlap with the index of a row having a non-zero value among the rows of the precoding matrix for the second SRS resource set. Additionally or alternatively, the terminal may report information about the third precoding matrix set and information about the fourth precoding matrix set to the base station as capability information of the terminal.

[0410] Additionally or alternatively, if one or more operating modes (e.g., full power mode 1, 2, etc.) are pre-defined for full power transmission, the terminal may report to the base station, as capability information of the terminal, information about whether the terminal supports one or more operating modes for each of the first uplink transmission method and the second uplink transmission method.

[0411] Additionally or alternatively, the terminal may report first codebook coherency capability information for the first uplink transmission scheme and second codebook coherency capability information for the second uplink transmission scheme to the base station as capability information of the terminal. Here, the second codebook coherency capability information may include rank-specific coherency capability information for each SRS resource set related to the second uplink transmission scheme. In this regard, when the terminal receives CBSR (codebook subset restriction) related information for uplink transmission from the base station, the CBSR related information may be individually, i.e., distinctly, set for the first uplink transmission scheme and the second uplink transmission scheme described above.

[0412] Additionally or alternatively, the SRS resource set for the second uplink transmission method may be configured to include SRS resources with different port numbers. In this case, the control information in step S920 may include information indicating, for the corresponding SRS resource set, an SRS resource with a port number that supports full power transmission among the SRS resources.

[0413] It goes without saying that the operation of the terminal in FIG. 9 and / or the settings / instructions related thereto can be specified based on the contents of the embodiments described above in the present disclosure (e.g., embodiments 1 to 3 and detailed embodiments thereof).

[0414] FIG. 10 is a diagram illustrating the operation of a base station for a method of receiving uplink transmission according to an embodiment of the present disclosure.

[0415] FIG. 10 illustrates the operation of a base station based on the previously proposed methods (e.g., any one of Embodiments 1 to 3 and detailed embodiments thereof, or a combination of one or more (detailed) embodiments). The example of FIG. 10 is for convenience of explanation and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 10 may be omitted depending on the situation and / or setting. In addition, the base station in FIG. 10 is only an example and may be implemented as a device illustrated in FIG. 11 below. For example, the processor (102 / 202) of FIG. 11 may control the transceiver (106 / 206) to transmit and receive channels / signals / data / information, etc., and may also control the transceiver (106 / 206) to store the channels / signals / data / information to be transmitted or received in the memory (104 / 204).

[0416] Additionally, the operation of FIG. 10 may be processed by one or more processors (102, 202) of FIG. 11, and the operation of FIG. 10 may be stored in a memory (e.g., one or more memories (104, 204) of FIG. 11) in the form of a command / program (e.g., an instruction, an executable code) for driving at least one processor (e.g., 102, 202) of FIG. 11.

[0417] In step S1010, the base station can receive a report of capability information related to full power transmission from the terminal.

[0418] In this regard, when reporting the corresponding capability information, the terminal may separately report information on the STRP transmission method (i.e., non-STxMP transmission, single panel transmission, etc.) and information on the STxMP transmission method.

[0419] For example, the capability information may include information about a first set of precoding matrices for full power transmission of a data channel (e.g., PUSCH) and information about a second set of precoding matrices. In this case, the first set of precoding matrices may be related to a first uplink transmission scheme (e.g., STRP transmission scheme) based on one set of sounding reference signal (SRS) resources, and the second set of precoding matrices may be related to a second uplink transmission scheme (e.g., STxMP transmission scheme) based on at least two sets of SRS resources.

[0420] In step S1020, the base station may transmit control information (e.g., DCI) including information (e.g., PMI by TPMI field) regarding at least one precoding matrix for a data channel (e.g., PUSCH) to the terminal. Thereafter, in step S1030, the base station may receive from the terminal a data channel transmitted based on the at least one precoding matrix.

[0421] Specific details regarding the first uplink transmission method and the second uplink transmission method, the precoding matrix / precoding matrix set related thereto, the operation mode for full power transmission, the SRS resource set / SRS resources, and the terminal capability information reporting are duplicated with those described in FIG. 9, and therefore, a detailed description thereof is omitted.

[0422] It goes without saying that the information on the operation and / or setting / instruction of the base station in FIG. 10 can be specified based on the contents of the embodiments described in the present disclosure (e.g., embodiments 1 to 3 and detailed embodiments thereof).

[0423] General devices to which the present disclosure may be applied

[0424] FIG. 11 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0425] Referring to FIG. 11, the first device (100) and the second device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR).

[0426] A 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) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts 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 a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present disclosure, a device may also mean a communication modem / circuit / chip.

[0427] 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 memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). In addition, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts 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 a wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may 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 used interchangeably with an RF unit. In the present disclosure, a device may also mean a communication modem / circuit / chip.

[0428] Hereinafter, the hardware elements of the device (100, 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, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in the present disclosure, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure.

[0429] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, proposals, methods and / or operation flowcharts disclosed in this disclosure may be implemented using firmware or software configured to perform one or more processors (102, 202) or 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 operation flowcharts disclosed in this disclosure may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0430] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0431] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of the present disclosure, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of the present disclosure, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled 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, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure, via one or more antennas (108, 208). In the present disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0432] The embodiments described above are combinations of components and features of the present disclosure in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, it is also possible to form embodiments of the present disclosure by combining some components and / or features. 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 another embodiment or may be replaced with corresponding components or features of another embodiment. It is self-evident that claims that do not have an explicit citation relationship in the patent claims may be combined to form embodiments or incorporated as new claims through post-application amendments.

[0433] It will be apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the essential characteristics of the present disclosure. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present disclosure are intended to be included within the scope of the present disclosure.

[0434] The scope of the present disclosure includes software or machine-executable instructions (e.g., an operating system, an application, firmware, a program, etc.) that cause operations according to the methods of various embodiments to be executed on a device or a computer, and a non-transitory computer-readable medium having such software or instructions stored thereon and executable on the device or computer. Instructions that can be used to program a processing system to perform the features described in the present disclosure can be stored on / in a storage medium or a computer-readable storage medium, and a computer program product including such a storage medium can be used to implement the features described in the present disclosure. 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 optionally includes one or more storage devices remotely located from the processor(s). The memory or, alternatively, the non-volatile memory device(s) within the memory comprise a non-transitory computer-readable storage medium. The features described in this disclosure may be incorporated into software and / or firmware stored on any of the machine-readable media, which may control the hardware of the processing system and allow the processing system to interact with other mechanisms that utilize results according to embodiments of the present disclosure. Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments / containers.

[0435] Here, the wireless communication technology implemented in the device (100, 200) of the present disclosure may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented with standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the device (100, 200) of the present disclosure may perform communication based on LTE-M technology. At this time, for example, 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, LTE-M technology can be implemented by at least 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-described names. Additionally or alternatively, the wireless communication technology implemented in the device (100, 200) of the present disclosure can include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-described names. For example, ZigBee technology can create personal area networks (PAN) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

[0436] The method proposed in this disclosure is explained with a focus on examples applied to 3GPP LTE / LTE-A and 5G systems, but can be applied to various wireless communication systems in addition to 3GPP LTE / LTE-A and 5G systems.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: A step of reporting capability information related to full power transmission to a base station; A step of receiving control information including information about at least one precoding matrix for a data channel from the base station; and A step of transmitting the data channel to the base station based on the at least one precoding matrix, The above capability information includes information about a first set of precoding matrices for full power transmission of the data channel and information about a second set of precoding matrices, A method, wherein the first set of precoding matrices relates to a first uplink transmission scheme based on one set of sounding reference signal (SRS) resources, and the second set of precoding matrices relates to a second uplink transmission scheme based on at least two sets of SRS resources.

2. In paragraph 1, Based on the first SRS resource set and the second SRS resource set for the second uplink transmission method being indicated by the control information, A method in which the index of a row having a non-zero value among the rows of the precoding matrix for the first SRS resource set does not overlap with the index of a row having a non-zero value among the rows of the precoding matrix for the second SRS resource set.

3. In paragraph 1, The control information further includes instruction information indicating the first uplink transmission method or the second uplink transmission method, Wherein the instruction information indicates a first uplink transmission method and the data channel is transmitted with full power transmission, one precoding matrix indicated by the control information is included in the first precoding matrix set, A method wherein at least two precoding matrices indicated by the control information are included in the second precoding matrix set, based on the above instruction information indicating a second uplink transmission method and the data channel being transmitted with full power transmission.

4. In paragraph 1, Based on the method in which M sets of SRS resources share N ports, supported by the terminal, For the first and second operation modes pre-defined for the above full power transmission, The first operation mode and the second operation mode are defined to be configurable by the base station to the terminal for the first uplink transmission method, A method in which only the second operation mode is defined to be configurable to the terminal by the base station for the second uplink transmission method.

5. In paragraph 1, Based on the above terminal being set to a specific operation mode among the pre-defined operation modes for the above full power transmission, A method wherein the precoding matrix additionally available to the terminal for the specific operation mode is configured differently depending on whether the precoding matrix is ​​based on the first uplink transmission method or the second uplink transmission method.

6. In paragraph 1, Among the precoding matrices related to the second uplink transmission method, for a precoding matrix that does not support the full power transmission, A method in which a power scaling factor for transmission of a data channel is equal to the number of non-zero data channel ports divided by the maximum number of SRS ports supported by the terminal.

7. In paragraph 6, A method in which a power scaling factor for transmission of the data channel is calculated for each SRS resource set based on at least two SRS resource sets being set for the second uplink transmission method.

8. In paragraph 1, Based on one or more operating modes being pre-defined for the above full power transmission, A method wherein the above capability information further includes information on whether the terminal supports one or more operation modes for each of the first uplink transmission method and the second uplink transmission method.

9. In paragraph 1, A method in which the SRS resource set for the second uplink transmission method is configured to include SRS resources having different numbers of ports.

10. In paragraph 9 A method wherein the above control information includes information indicating an SRS resource having a number of ports supporting full power transmission among the SRS resources for the corresponding SRS resource set.

11. In paragraph 1, The first precoding matrix set is included in the third precoding matrix set available to the terminal for the first uplink transmission method, A method wherein the second precoding matrix set is included in a fourth precoding matrix set available to the terminal for the second uplink transmission method.

12. In paragraph 11, Based on the first SRS resource set and the second SRS resource set being set for the second uplink transmission method, For the above fourth precoding matrix set, A method in which the index of a row having a non-zero value among the rows of the precoding matrix for the first SRS resource set does not overlap with the index of a row having a non-zero value among the rows of the precoding matrix for the second SRS resource set.

13. In paragraph 11, A method further comprising the step of reporting information about the third precoding matrix set and information about the fourth precoding matrix set to the base station as capability information of the terminal.

14. In paragraph 1, A method further comprising the step of reporting, to the base station, first codebook coherency capability information for the first uplink transmission method and second codebook coherency capability information for the second uplink transmission method as capability information of the terminal.

15. In paragraph 14, A method wherein the second codebook coherency capability information includes rank-specific coherency capability information for each SRS resource set related to the second uplink transmission method.

16. In paragraph 14, Further comprising a step of receiving information related to codebook subset restriction for uplink transmission from the base station, A method wherein the above codebook subset restriction related information is individually set for the first uplink transmission method and the second uplink transmission method.

17. In a wireless communication system, the terminal: one or more transmitters and receivers; and comprising one or more processors connected to said one or more transceivers, One or more of the above processors: Report capability information related to full power transmission to the base station; Receive control information including information about at least one precoding matrix for a data channel from the base station; To the base station, set to transmit the data channel based on the at least one precoding matrix, The above capability information includes information about a first set of precoding matrices for full power transmission of the data channel and information about a second set of precoding matrices, A device, wherein the first set of precoding matrices relates to a first uplink transmission scheme based on one set of sounding reference signal (SRS) resources, and the second set of precoding matrices relates to a second uplink transmission scheme based on at least two sets of SRS resources.

18. A method performed by a base station in a wireless communication system, the method comprising: A step of receiving a report of capability information related to full power transmission from a terminal; A step of transmitting control information including information about at least one precoding matrix for a data channel to the terminal; and A step of receiving the data channel transmitted based on the at least one precoding matrix from the terminal, The above capability information includes information about a first set of precoding matrices for full power transmission of the data channel and information about a second set of precoding matrices, A method, wherein the first set of precoding matrices relates to a first uplink transmission scheme based on one set of sounding reference signal (SRS) resources, and the second set of precoding matrices relates to a second uplink transmission scheme based on at least two sets of SRS resources.

19. In a wireless communication system, at a base station, the base station: one or more transmitters and receivers; and comprising one or more processors connected to said one or more transceivers, One or more of the above processors: Receive a report of capability information related to full power transmission from the terminal; Transmitting control information including information on at least one precoding matrix for a data channel to the terminal; Set to receive the data channel transmitted based on the at least one precoding matrix from the terminal, The above capability information includes information about a first set of precoding matrices for full power transmission of the data channel and information about a second set of precoding matrices, A device, wherein the first set of precoding matrices relates to a first uplink transmission scheme based on one set of sounding reference signal (SRS) resources, and the second set of precoding matrices relates to a second uplink transmission scheme based on at least two sets of SRS resources.

20. In a processing device configured to control a terminal in a wireless communication system, the processing device: one or more processors; and A processing device comprising one or more computer memories operatively connected to said one or more processors and storing instructions for performing a method according to any one of claims 1 to 16 based on execution by said one or more processors.

21. One or more non-transitory computer-readable media storing one or more instructions, A computer-readable medium, wherein the one or more commands are executed by one or more processors to control a device in a wireless communication system to perform a method according to any one of claims 1 to 16.

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