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

Abstract

A method and apparatus for performing uplink transmission and reception in a wireless communication system are disclosed. A method for performing uplink transmission by a terminal according to one embodiment of the present disclosure includes the steps of receiving downlink control information (DCI) from a base station, which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field, and performing uplink transmission based on the DCI, wherein the size of the first TPMI field is determined to be the maximum value among a first bit size, a second bit size, and a third bit size, and each of the first bit size, the second bit size, and the third bit size may be based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

Description

[Technical Field]

[0001] This disclosure relates to wireless communication systems, and more particularly to methods and apparatus for performing uplink transmission and reception in wireless communication systems. [Background technology]

[0002] Mobile communication systems were developed to provide voice services while ensuring user activity. However, mobile communication systems have expanded beyond voice to include data services, and currently, the explosive increase in traffic is causing resource shortages. Furthermore, users are demanding faster services, so more advanced mobile communication systems are desired.

[0003] The requirements for next-generation mobile communication systems are broad, including the ability to handle explosive data traffic, a dramatic increase in transmission rates per user, acceptance of a significantly increased number of connected devices, extremely low end-to-end latency, and support for high energy efficiency. To this end, various technologies such as dual connectivity, massive multiple input / output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, and device networking are being researched. [Overview of the project] [Problems that the invention aims to solve]

[0004] The technical problem addressed by this disclosure is to provide a method and apparatus for performing uplink transmission and reception in a wireless communication system.

[0005] Furthermore, a further technical challenge of this disclosure is to provide an uplink transmission method and apparatus when simultaneous transmission across multiple panels (STxMP) is configured in a wireless communication system.

[0006] Furthermore, a further technical challenge of this disclosure is to provide a method and apparatus for transmitting and receiving multi-panel downlink control information (DCI) having different capacities.

[0007] The technical challenges addressed in this disclosure are not limited to those mentioned above, and other technical challenges not mentioned will be clearly understood by those with ordinary skill in the art to which this disclosure pertains from the following description. [Means for solving the problem]

[0008] As an embodiment of the present disclosure, a method performed by a terminal in a wireless communication system includes the steps of: receiving downlink control information (DCI) from a base station, which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field; and performing an uplink transmission based on the DCI, wherein the size of the first TPMI field is determined to be the maximum value among a first bit size, a second bit size, and a third bit size, and each of the first bit size, the second bit size, and the third bit size may be based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

[0009] As an embodiment of the present disclosure, a method performed by a base station in a wireless communication system comprises: transmitting, to a terminal, downlink control information (DCI) including at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field; and performing uplink reception based on the DCI, wherein the size of the first TPMI field is determined to be a maximum value among a first bit size, a second bit size, and a third bit size, and each of the first bit size, the second bit size, and the third bit size may be based on whether simultaneous transmission across multi-panels (STxMP) transmission is indicated, a type of codebook subset, a maximum number of ranks, and a type of full power mode. Effects of the Invention

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

[0011] Furthermore, according to various embodiments of the present disclosure, an uplink transmission method and an apparatus can be provided for when STxMP across multiple panels is configured in a wireless communication system.

[0012] Furthermore, according to various embodiments of the present disclosure, a method and an apparatus for transmitting and receiving DCI for multiple panels having different capabilities can be provided.

[0013] Effects obtainable from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by a person having ordinary skill in the technical field to which the present disclosure pertains from the following description. [Brief explanation of the drawing]

[0014] The accompanying drawings, included as part of the detailed description to aid in understanding this disclosure, provide examples relating to this disclosure and illustrate the technical features of this disclosure together with the detailed description. [Figure 1] This figure illustrates the structure of a wireless communication system to which this disclosure can be applied. [Figure 2] This figure illustrates a frame structure in a wireless communication system to which this disclosure can be applied. [Figure 3] This figure illustrates a resource grid in a wireless communication system to which this disclosure can be applied. [Figure 4] This figure illustrates a physical resource block in a wireless communication system to which this disclosure can be applied. [Figure 5] This figure illustrates a slot structure in a wireless communication system to which this disclosure can be applied. [Figure 6] This figure illustrates physical channels used in wireless communication systems to which this disclosure can be applied, and general signal transmission and reception methods using them. [Figure 7] This figure illustrates a signaling procedure between a network and a terminal for an uplink transmission / reception method according to one embodiment of the present disclosure. [Figure 8] This diagram illustrates the uplink transmission operation of a terminal in a wireless communication system to which this disclosure can be applied. [Figure 9] This diagram illustrates the uplink reception operation of a base station in a wireless communication system to which this disclosure can be applied. [Figure 10] This is a block diagram showing a wireless communication device according to one embodiment of the present disclosure. [Modes for carrying out the invention]

[0015] Preferred embodiments relating to this disclosure will be described in detail below with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to illustrate exemplary embodiments of this disclosure and is not intended to represent the only possible embodiments of this disclosure. The detailed description below includes specific details to provide a complete understanding of this disclosure. However, those skilled in the art will understand that this disclosure is implementable without such specific details.

[0016] In some cases, to avoid ambiguity of the concepts in this disclosure, known structures and devices may be omitted, or they may be shown in the form of block diagrams focusing on the core function of each structure and device.

[0017] In this disclosure, when one component is “connected,” “joined,” or “linked” to another component, this may include not only direct connections but also indirect connections between them where other components exist. Also, in this disclosure, the terms “includes” or “have” identify the presence of the referred features, stages, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, stages, operations, elements, components and / or groups thereof.

[0018] In this disclosure, terms such as “first,” “second,” etc., are used solely to distinguish one component from another, and are not used to limit the components, nor do they limit the order or importance of the components unless otherwise specified. Therefore, 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.

[0019] The terms used in this disclosure are for illustrative purposes relating to specific embodiments and are not intended to limit the scope of the claims. As used in the description of the embodiments and in the attached claims, singular forms are intended to include plural forms unless otherwise specified in the context. The terms “and / or” used in this disclosure may refer to one of the related enumerated items, or to any and all possible combinations of two or more of them. In this disclosure, “ / ” between words has the same meaning as “and / or” unless otherwise specified.

[0020] This disclosure describes a wireless communication network or wireless communication system, where operations performed in the wireless communication network may occur in the process of a device (e.g., a base station) controlling the network and transmitting or receiving signals, or in the process of a terminal connected to the wireless network transmitting or receiving signals to or from the network.

[0021] In this disclosure, transmitting or receiving a channel includes transmitting or receiving information or signals on that channel. For example, transmitting a control channel means transmitting control information or signals on the control channel. Similarly, transmitting a data channel means transmitting data information or signals on the data channel.

[0022] In the following, downlink (DL) refers to communication from the base station to the terminal, and uplink (UL) refers to communication from the terminal to the base station. In the downlink, the transmitter may be part of the base station, and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal, and the receiver may be part of the base station. The base station may be referred to as the first communication device, and the terminal as the second communication device. The term Base Station (BS) may be replaced with terms such as fixed station, Node B, eNB (evolved-Node B), gNB (Next Generation Node B), BTS (base transceiver system), Access Point (AP), network (5G network), AI (Artificial Intelligence) system / module, RSU (roadside unit), robot, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc. Furthermore, the term "Terminal" may be fixed or mobile, and may be replaced by terms such as UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, RSU (roadside unit), robot, AI (Artificial Intelligence) module, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, and VR (Virtual Reality) device.

[0023] The following technologies may be used in various wireless connection systems such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA may be implemented by wireless technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA may be implemented by wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA may be implemented by wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project: registered trademark: hereinafter the same) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) which uses E-UTRA, and LTE-A (Advanced) / LTE-A pro are advanced versions of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an advanced version of 3GPP LTE / LTE-A / LTE-A pro.

[0024] For clarity, the explanation will be based on 3GPP communication systems (e.g., LTE-A, NR), but the technical concepts of this disclosure are not limited thereto. LTE refers to 3GPP TS (Technical Specification) 36.xxx Release 8 and later technologies. More specifically, LTE technology from 3GPP TS 36.xxx Release 10 onwards is called LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 onwards is called LTE-A pro. 3GPP NR refers to TS 38.xxx Release 15 and later technologies. LTE / NR may be referred to as a 3GPP system. "xxx" means the standard document detail number. LTE / NR may be referred to as a 3GPP system. For background information, terminology, abbreviations, etc., used in this disclosure, refer to the standard documents published prior to this disclosure. For example, refer to the following documents.

[0025] For 3GPP LTE, you can refer to TS 36.211 (Physical Channels and Modulation), TS 36.212 (Multiplexing and Channel Coding), TS 36.213 (Physical Layer Procedures), TS 36.300 (General Description), and TS 36.331 (Radio Resource Control).

[0026] For 3GPP NR, you can refer to TS 38.211 (Physical Channels and Modulation), TS 38.212 (Multiplexing and Channel Coding), TS 38.213 (Physical Layer Procedures for Control), TS 38.214 (Physical Layer Procedures for Data), TS 38.300 (General Description of NR and NG-RAN (New Generation-Radio Access Network)), and TS 38.331 (Radio Resource Control Protocol Standard).

[0027] Abbreviations of terms used in this disclosure are defined as follows:

[0028] - BM: Beam Management

[0029] - CQI: Channel Quality Indicator

[0030] - CRI: Channel State Information - Reference Signal Resource Indicator

[0031] - CSI: Channel State Information

[0032] - CSI-IM: Channel State Information - Interference Measurement

[0033] - CSI-RS: Channel State Information - Reference Signal

[0034] - DMRS: Demodulation reference signal

[0035] - FDM: Frequency Division Multiplexing

[0036] - FFT: Fast Fourier Transform

[0037] - IFDMA: Interleaved frequency division multiple access

[0038] - IFFT: Inverse Fast Fourier Transform

[0039] - L1-RSRP: Layer 1 reference signal received power

[0040] - L1-RSRQ: Layer 1 reference signal received quality

[0041] - MAC: Medium Access Control

[0042] - NZP: Non-Zero Power

[0043] - OFDM: Orthogonal frequency division multiplexing

[0044] - PDCCH: Physical Downlink Control Channel

[0045] - PDSCH: Physical Downlink Shared Channel

[0046] - PMI: Precoding matrix indicator

[0047] - RE: Resource element

[0048] - RI: Rank indicator

[0049] - RRC: Radio Resource Control

[0050] - RSSI: received signal strength indicator

[0051] - Rx: Reception

[0052] - QCL: quasi co-location

[0053] - SINR: Signal-to-interference and noise ratio

[0054] - SSB (or SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH))

[0055] - TDM: time division multiplexing

[0056] - TRP: Transmission and Reception Point

[0057] - TRS: Tracking Reference Signal

[0058] - Tx: transmission

[0059] - UE: User equipment

[0060] - ZP: Zero Power

[0061] General System

[0062] As more communication devices demand greater communication capacity, the need for improved mobile broadband communication compared to existing radio access technology (RAT) is emerging. Massive Machine Type Communications (MTC), which connects numerous devices and things to provide various services anytime, anywhere, is also a major consideration in next-generation communications. In addition, communication system design that takes into account reliability and latency-sensitive services / terminals is being discussed. Thus, the introduction of next-generation RATs that consider eMBB (enhanced mobile broadband communication), Mmtc (massive MTC), URLLC (Ultra-Reliable and Low Latency Communication), etc., is being discussed, and for convenience in this disclosure, this technology will be referred to as NR. NR is an expression representing an example of 5G RAT.

[0063] The new RAT system, including NR, uses an OFDM transmission scheme or a similar 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 with different numerologies may coexist within a single cell.

[0064] 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.

[0065] Figure 1 illustrates the structure of a wireless communication system to which this disclosure can be applied.

[0066] Referring to Figure 1, the NG-RAN consists of gNBs that provide control plane (RRC) protocol termination for the NG-RA (NG-Radio Access) user plane (i.e., the new AS (access stratum) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and UE. The gNBs are interconnected via the Xn interface. The gNBs are also connected to the NGC (New Generation Core) via the NG interface. More specifically, the gNBs are connected to the AMF (Access and Mobility Management Function) via the N2 interface and to the UPF (User Plane Function) via the N3 interface.

[0067] Figure 2 illustrates a frame structure in a wireless communication system to which this disclosure can be applied.

[0068] The NR system can support multiple numerologies, which may be defined by subcarrier spacing and cyclic prefix (CP) overhead. Multiple subcarrier spacings may be derived by scaling the fundamental (reference) subcarrier spacing by an integer N (or μ). Furthermore, even assuming that very low subcarrier spacings are not used at very high carrier frequencies, the numerologies used may be selected independently of the frequency band. The NR system may also support various frame structures based on multiple numerologies.

[0069] The following describes the OFDM numerologies and frame structures that can be considered in the NR system. The multiple OFDM numerologies supported in the NR system may be defined as shown in Table 1 below.

[0070] [Table 1]

[0071] NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, an SCS of 15kHz supports wide area in the traditional cellular band; an SCS of 30kHz / 60kHz supports dense-urban areas, lower latency, and wider carrier bandwidth; and an SCS of 60kHz or higher supports bandwidths greater than 24.25GHz to overcome phase noise. An NR frequency band is defined as two types (FR1, FR2) of frequency ranges. FR1 and FR2 may be configured as shown in Table 2 below. Also, FR2 can mean millimeter wave (mmW).

[0072] [Table 2]

[0073] In relation to the frame structure in an NR system, the sizes of various fields in the time domain are T c = 1 / (Δf max ·N f It is expressed as a multiple of the time unit of ). Here, Δf max =480·10 3 It is Hz, N f= 4096. Downlink and uplink transmissions are T f = 1 / (Δf max N f / 100)·T c =organized into radio frames with a 10 ms interval. Here, each radio frame has a T sf =(Δf max N f / 1000)·T c interval of 1 ms and consists of 10 subframes. In this case, there may be one set of frames for the uplink and one set of frames for the downlink. Furthermore, transmission in uplink frame number i by a terminal must start no later than T TA =(N TA +N TA,offset )T c before the start of the corresponding downlink frame at the terminal. For subcarrier spacing configuration μ, a slot is numbered n s μ ∈{0,...,N slot subframe,μ −1} in increasing order within a subframe, and numbered n s,f μ ∈{0,...,N slot frame,μ −1} in increasing order within a radio frame. One slot consists of N symb slot consecutive OFDM symbols, and N symb slot is determined by the CP. The start of slot n s μ in a subframe coincides with the start of OFDM symbol n s μ N symb slotThe start and timing are aligned. Not all terminals can transmit and receive simultaneously, which means that not all OFDM symbols in the downlink slot or uplink slot can be used.

[0074] Table 3 shows the number of OFDM symbols per slot in a general CP (N symb slot ), Number of slots per wireless frame (N slot frame,μ ), Number of slots per subframe (N slot subframe,μ Table 4 shows the number of OFDM symbols per slot, the number of slots per wireless frame, and the number of slots per subframe in the extended CP.

[0075] [Table 3]

[0076] [Table 4]

[0077] Figure 2 shows an example where μ=2 (SCS is 60kHz), and referring to Table 3, one subframe may contain four slots. The one subframe = {1,2,4} slots shown in Figure 2 is just an example, and the number of slots that can be included in one subframe is defined as shown in Table 3 or Table 4. Also, a mini-slot may contain two, four, or seven symbols, or more or fewer symbols. In relation to physical resources in an NR system, antenna ports, resource grids, resource elements, resource blocks, carrier parts, etc. may be considered. The following describes in detail the physical resources that can be considered in an NR system. First, in relation to antenna ports, an antenna port is defined so that the channel on which symbols on the antenna port are carried can be inferred from the channels on which other symbols on the same antenna port are carried. If the large-scale property of a channel carrying symbols on one antenna port can be inferred from the channel carrying symbols on another antenna port, then the two antenna ports can be said to be in a QC / QCL (quasi co-located or quasi co-location) relationship. Here, the large-scale property includes one or more of the following: delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0078] Figure 3 illustrates a resource grid in a wireless communication system to which this disclosure can be applied.

[0079] Referring to Figure 3, the resource grid is N in the frequency domain. RB μN sc RB It consists of subcarriers, with one subframe being 14.2 μ This description illustrates, but is not limited to, the use of OFDM symbols.

[0080] JPEG2026529600000006.jpg101169

[0081] Point A acts as the common reference point for the resource block grid and is obtained as follows:

[0082] - The offsetToPointA for the Primary Cell (PCell) downlink indicates the frequency offset between the lowest subcarrier of the lowest resource block overlapping with the SS / PBCH block used by the terminal for initial cell selection and point A. It is expressed in resource block units, assuming a 15kHz subcarrier spacing for FR1 and a 60kHz subcarrier spacing for FR2.

[0083] - absoluteFrequencyPointA represents the frequency position of point A, expressed similarly to ARFCN (absolute radio-frequency channel number).

[0084] Common resource blocks are numbered upwards from 0 in the frequency domain relative to the subcarrier spacing setting μ. The center of subcarrier 0 of common resource block 0 relative to the subcarrier spacing setting μ coincides with "point A". In the frequency domain, common resource block number n... CRB μ The relationship between the resource element (k,l) and the subcarrier spacing setting μ is given by equation 1 below.

[0085]

number

[0086] In Equation 1, k is defined relative to point A such that k=0 corresponds to a subcarrier centered at point A. The physical resource block ranges from 0 to N within the bandwidth part (BWP). BWP,i size,μ The numbers are assigned down to -1, where i is the BWP number. In BWP i, the physical resource block n PRB and common resource block n CRB The relationship between them is given by equation 2 below.

[0087]

number

[0088] N BWP,i start,μ This is a common resource block where BWP starts relative to common resource block 0.

[0089] Figure 4 illustrates a physical resource block in a wireless communication system to which this disclosure can be applied. Figure 5 illustrates a slot structure in a wireless communication system to which this disclosure can be applied.

[0090] Referring to Figures 4 and 5, a slot contains multiple symbols in the time domain. For example, in a general CP, one slot contains seven symbols, while in an extended CP, one slot contains six symbols.

[0091] A carrier wave contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined as multiple consecutive (physical) resource blocks in the frequency domain and may correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier wave may contain up to N (e.g., 5) BWPs. Data communication takes place over activated BWPs, and only one BWP may be activated for a single terminal. In a resource grid, each element is called a resource element (RE) and may be mapped to a single complex symbol.

[0092] An NR system may support up to 400 MHz per component carrier (CC). If a terminal operating on such a wideband CC keeps its radio frequency (RF) chip on for the entire CC at all times, terminal battery consumption may increase. Alternatively, considering various use cases operating within a single wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different numerologies (e.g., subcarrier spacing) may be supported for each frequency band within that CC. Alternatively, terminals may have different capabilities for the maximum bandwidth. Taking this into consideration, a base station may instruct terminals to operate only on a portion of the wideband CC's bandwidth rather than the entire bandwidth, and this portion of the bandwidth is conveniently defined as a bandwidth part (BWP). A BWP may consist of consecutive RBs on the frequency axis and may correspond to a single numerology (e.g., subcarrier spacing, CP length, slot / minislot interval).

[0093] On the other hand, a base station can configure multiple BWPs within a single CC set up on a terminal. For example, a PDCCH monitoring slot can be configured with a BWP occupying a relatively small frequency range, while the PDSCH instructed by the PDCCH may be scheduled on a larger BWP. Alternatively, if UEs are concentrated on a particular BWP, other BWPs may be configured for some terminals for load balancing. Or, considering frequency domain inter-cell interference cancellation between adjacent cells, a portion of the spectrum from the total bandwidth can be excluded, and both BWPs can be configured within the same slot.

[0094] In other words, a base station can configure at least one DL / UL BWP for a terminal associated with a broadband CC. The base station can activate at least one of the DL / UL BWPs configured at a given time (by L1 signaling, MAC CE (Control Element), or RRC signaling, etc.). The base station can also instruct switching to another configured DL / UL BWP (by L1 signaling, MAC CE, or RRC signaling, etc.). Alternatively, it may switch to a designated DL / UL BWP when a timer expires. In this case, the activated DL / UL BWP is defined as the active DL / UL BWP. However, in situations such as when a terminal is in the initial access process or before the RRC connection is set up, the configuration for the DL / UL BWP may not be received. In such situations, the DL / UL BWP assumed by the terminal is defined as the initial active DL / UL BWP.

[0095] Figure 6 illustrates physical channels used in wireless communication systems to which this disclosure can be applied, and general signal transmission and reception methods using them.

[0096] In wireless communication systems, a terminal receives information from a base station via the downlink and transmits information to the base station via the uplink. The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.

[0097] When a terminal is powered on or enters a new cell, it performs initial cell search operations, such as synchronizing with the base station (S601). To do this, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station to synchronize with the base station and obtain information such as the cell identifier (ID). Subsequently, the terminal receives the physical broadcast channel (PBCH) from the base station to obtain intra-cell broadcast information. Meanwhile, during the initial cell search phase, the terminal can receive a downlink reference signal (DL RS) to check the downlink channel status.

[0098] Once the terminal has completed its initial cell search, it can receive the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) via the information carried on the PDCCH, thereby obtaining more specific system information (S602).

[0099] On the other hand, if the terminal is initially connected to a base station or does not have radio resources for signal transmission, it can perform a Random Access Procedure (RACH) to the base station (stages S603 to S606). To do this, the terminal transmits a specific sequence as a preamble over a Physical Random Access Channel (PRACH) (S603 and S605), and can receive a response message to the preamble on the PDCCH and the corresponding PDSCH (S604 and S606). In the case of a conflict-based RACH, a Contention Resolution Procedure can also be performed.

[0100] A terminal that has performed the procedures described above can then perform general uplink / downlink signal transmission procedures, such as receiving PDCCH / PDSCH (S607) and transmitting Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S608). In particular, the terminal receives Downlink Control Information (DCI) via PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and its format differs depending on its purpose of use.

[0101] On the other hand, control information that a terminal transmits to or receives from a base station on the uplink includes downlink / uplink ACK / NACK (Acknowledgement / Non-Acknowledgement) signals, CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indicator), etc. In the 3GPP LTE system, the terminal can transmit the above-mentioned control information such as CQI / PMI / RI via PUSCH and / or PUCCH.

[0102] Table 5 shows an example of the DCI format in the NR system.

[0103] [Table 5]

[0104] Referring to Table 5, DCI formats 0_0, 0_1, and 0_2 can include resource information related to PUSCH scheduling (e.g., UL / SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), 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.), multiplex antenna related information (e.g., DMRS sequence initialization information, antenna ports, CSI requests, etc.), and power control information (e.g., PUSCH power control, etc.). The control information included in each DCI format may be predefined. DCI format 0_0 is used for PUSCH scheduling in a single cell. The information contained in DCI format 0_0 is transmitted after being scrambled with CRC (cyclic redundancy check) by C-RNTI (Cell RNTI: Cell Radio Network Temporary Identifier), CS-RNTI (Configured Scheduling RNTI), or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI).

[0105] DCI format 0_1 ​​is used to instruct terminals to schedule one or more pushes in a single cell, or to provide configured grant (CG) downlink feedback information. The information contained in DCI format 0_1 ​​is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI (Semi-Persistent CSI RNTI), or MCS-C-RNTI.

[0106] DCI format 0_2 is used for scheduling pushes within a single cell. The information contained in DCI format 0_2 is CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI before transmission.

[0107] Next, DCI formats 1_0, 1_1, and 1_2 may include resource information related to PDSCH scheduling (e.g., frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.), transmission block (TB) related information (e.g., MCS, NDI, RV, etc.), HARQ related information (e.g., process number, DAI, PDSCH-HARQ feedback timing, etc.), multiplex antenna related information (e.g., antenna ports, TCI (transmission configuration indicator), SRS (sounding reference signal) requests, etc.), and PUCCH related information (e.g., PUCCH power control, PUCCH resource indicator, etc.), and the control information included in each DCI format may be predefined.

[0108] DCI format 1_0 is used for PDSCH scheduling within a single DL cell. The information contained in DCI format 1_0 is CRC scrambled by C-RNTI, CS-RNTI, or MCS-C-RNTI before transmission.

[0109] DCI format 1_1 is used for PDSCH scheduling within a single cell. The information contained in DCI format 1_1 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0110] DCI format 1_2 is used for PDSCH scheduling within a single cell. The information contained in DCI format 1_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0111] Quasi-Co Location (QCL)

[0112] An antenna port is defined such that the channel on which a symbol is carried on an antenna port can be inferred from the channel on which other symbols are carried on the same antenna port. If the properties of the channel on which a symbol is carried on one antenna port can be inferred from the channel on which a symbol is carried on another antenna port, then the two antenna ports are said to be in a QC / QCL (quasi co-located or quasi co-location) relationship.

[0113] Here, the channel characteristics include one or more of the following: delay spread, Doppler spread, frequency / Doppler shift, average received power, received timing / average delay, and spatial reception parameter. Here, the spatial reception parameter refers to a spatial (received) channel characteristic parameter such as the angle of arrival.

[0114] The terminal may be configured by a list of up to M TCI-State settings in the upper-layer parameter PDSCH-Config in order to decode the PDSCH with the detected PDCCH having the intended DCI for the terminal and the given serving cell. The M depends on the UE capability.

[0115] Each TCI-State includes parameters for setting up the QCL (quasi co-location) relationship between one or two DL reference signals and the DM-RS ports of the PDSCH.

[0116] The QCL relationship is determined by the upper-level parameter qcl-Type1 for the first DL RS and qcl-Type2 (if set) for the second DL RS. For two DL RSs, the QCL type is not the same regardless of whether the reference is the same DL RS or different DL RSs.

[0117] The QCL type corresponding to each DL RS is given by the higher-level parameter qcl-Type in QCL-Info, and can take one of the following values:

[0118] - "QCL-TypeA":{Doppler shift,Doppler spread,average delay,delay spread}

[0119] - "QCL-TypeB":{Doppler shift,Doppler spread}

[0120] - "QCL-TypeC":{Doppler shift, average delay}

[0121] - "QCL-TypeD":{Spatial Rx parameter}

[0122] For example, if a target antenna port is a specific NZP CSI-RS, these NZP CSI-RS antenna ports may be instructed / configured to be QCL-Type A with a specific TRS and QCL-Type D with a specific SSB. A terminal that receives such instructions / configurations can receive the NZP CSI-RS using the Doppler and delay values ​​measured at the QCL-Type A TRS, and apply the received beam used for QCL-Type D SSB reception to the NZP CSI-RS reception.

[0123] The UE can receive activation commands via MAC CE signaling, which are used to map up to eight TCI states to codepoints in the DCI field "Transmission Configuration Indication".

[0124] Additionally, one or more UL TCI states may be indicated through a DL DCI (e.g., DCI format 1_1 or 1_2) as well as one or more DL TCI states. As another example, a DL DCI may contain only UL TCI states without any DL TCI states. The UL TCI states may indicate UL beams (i.e., UL spatial parameters) and power control-related parameters, etc. As an example, one UL TCI state may be indicated through the TCI field of a DL DCI, and the UL TCI state may be applied to all or some of the PUSCH / PUCCH / SRS resource sets after the beam utilization time (application time).

[0125] Multi-TRP related operations

[0126] Coordinated Multi-Point (CoMP) communication is a method in which multiple base stations exchange or utilize channel information (e.g., RI / CQI / PMI / LI (layer indicator)) fed back from terminals (e.g., using an X2 interface) and transmit it to the terminals in a coordinated manner to effectively control interference. Depending on the method used, CoMP can be classified into joint transmission (JT), coordinated scheduling (CS), coordinated beamforming (CB), dynamic point selection (DPS), and dynamic point blocking (DPB).

[0127] The M-TRP transmission method, in which M TRPs transmit data to one terminal, can be broadly divided into i) eMBB M-TRP transmission, which is a method for increasing the transmission rate, and ii) URLLC M-TRP transmission, which is a method for increasing the reception success rate and decreasing latency.

[0128] Furthermore, from the perspective of DCI transmission, the M-TRP transmission method can be divided into i) M-DCI (multiple DCI) based M-TRP transmission, where each TRP transmits an individual DCI, and ii) S-DCI (single DCI) based M-TRP transmission, where one TRP transmits a DCI. For example, in the case of S-DCI based M-TRP transmission, all scheduling information for the data transmitted by the M TRP must be transmitted to the terminal by a single DCI, and it can be used in an ideal backhaul (ideal BH) environment where dynamic coordination between two TRPs is possible.

[0129] UEs can recognize PUSCH (or PUCCH) scheduled by DCIs received in different control resource sets (CORESETs) (or CORESETs belonging to different CORESET groups) as PUSCH (or PUCCH) sent to different TRPs, or as PDSCH (or PDCCH) to different TRPs. Furthermore, the method for UL transmissions (e.g., PUSCH / PUCCH) sent to different TRPs, as described later, can also be applied identically to UL transmissions (e.g., PUSCH / PUCCH) sent to different panels belonging to the same TRP.

[0130] Hereinafter, the CORESET group identifier (group ID) described / referred to in this disclosure may mean an index / identifier (e.g., ID) for distinguishing CORESETs for each TRP / panel. A CORESET group may be a group / union of CORESETs distinguished by the index / identifier (e.g., ID) / CORESET group ID for distinguishing CORESETs for each TRP / panel. For example, a CORESET group ID may be specific index information defined within a CORESET configuration. In this case, a CORESET group may be set / indicated / defined by an index defined within a CORESET configuration for each CORESET. And / or, a CORESET group ID may mean an index / identifier / indicator for distinguishing / identifying CORESETs set / associated with each TRP / panel. Hereinafter, the CORESET group ID described / referred to in this disclosure may be rephrased as a specific index / specific identification information / specific indicator for distinguishing / identifying CORESETs set / associated with each TRP / panel. The CORESET group ID, i.e., the specific index / specific identification information / specific indicator for distinguishing / identifying CORESETs set / associated with each TRP / panel, may be set / instructed to a terminal by higher layer signaling (e.g., RRC signaling), second layer signaling (e.g., MAC-CE), first layer signaling (e.g., DCI), etc. As an example, PDCCH detection may be set / instructed to be performed for each TRP / panel (i.e., for each TRP / panel belonging to the same CORESET group) on a CORESET group basis.And / or, uplink control information (e.g., CSI, HARQ-A / N (ACK / NACK), SR (scheduling request)) and / or uplink physical channel resources (e.g., PUCCH / PRACH / SRS resources) may be configured / instructed to be managed / controlled separately for each TRP / panel (i.e., for each TRP / panel belonging to the same CORESET group) on a CORESET group basis. And / or, HARQ A / N (process / retransmission) for scheduled PDSCH / PUSCH etc. may be managed separately for each TRP / panel (i.e., for each TRP / panel belonging to the same CORESET group) on a CORESET group basis.

[0131] For example, the higher-level parameter, the ControlResourceSet information element (IE), is used to configure a time / frequency control resource set (CORESET). For example, the control resource set (CORESET) may be associated with the detection and reception of downlink control information. The ControlResourceSet IE may include a CORESET-related ID (e.g., controlResourceSetID), an index (e.g., CORESETPoolIndex) for the CORESET pool, time / frequency resource settings for the CORESET, and TCI information associated with the CORESET. For example, the CORESET pool index (e.g., CORESETPoolIndex) may be set to 0 or 1. In the above, a CORESET group may correspond to a CORESET pool, and a CORESET group ID may correspond to a CORESET pool index (e.g., CORESETPoolIndex).

[0132] The Rel-17 NR standard supports (1) MTRP PDCCH repetition transmission, (2) MTRP PDCCH single frequency network (SFN) transmission, (3) MTRP PDSCH SFN transmission, (4) S-DCI-based MTRP PUSCH repetition transmission, and (5) single PUCCH resource-based MTRP PUCCH repetition transmission. In all of these transmission methods, the same content (i.e., DCI or UL / DL TB or UCI) is repeatedly transmitted as a URLLC target enhancement to increase reliability. MTRP PDCCH repetition transmission is repeated using TDM or FDM, MTRP PDCCH / PDSCH SFN is repeated at the same time / frequency / layer, S-DCI-based MTRP PUSCH repetition transmission is repeated using TDM, and single PUCCH resource-based MTRP PUCCH repetition transmission is repeated using TDM.

[0133] Simultaneous transmission across multiple panels (STxMP)

[0134] Rel-18 discusses the introduction of methods by which UEs can simultaneously transmit multiple channels / reference signals (RS) of the same type or multiple channels / RS of different types. Existing UEs are limited in their ability to transmit multiple channels / RS in an instant (i.e., using the same time resources) (for example, it is possible to simultaneously transmit multiple SRS resources from different SRS resource sets for UL beam measurement, but not multiple PUSCHs). However, advanced UEs in the future may be able to relax these limitations and transmit multiple channels or RS simultaneously using multiple transmit panels. This operation can be called simultaneous transmission across multiple panels (STxMP), and UEs that support such operation can be called STxMP UEs. For example, two PUSCHs (PUSCH 1 and 2) corresponding to (carrying) two UL TBs may be scheduled using the same resource element (RE) (or the same multiple REs), and spatial relation RS1 and power control parameter set 1 (i.e., UL TCI state 1) and spatial relation RS2 and PC parameter set 2 (i.e., UL TCI state 2) may be set for the transmission of PUSCH 1 and 2, respectively. The UE can transmit PUSCH 1 using panel 1 corresponding to UL TCI state 1, and simultaneously transmit PUSCH 2 using panel 2 corresponding to UL TCI state 2.

[0135] When a base station schedules a push via DCI (Downlink Control Information), it can instruct whether to transmit the push as an STxMP, a single panel, or an M-TRP push repetition. In this case, the UE must have STxMP capability, and the STxMP mode (e.g., SDM method / mode or SFN method / mode) may be pre-enabled by higher-layer signaling (e.g., RRC signaling). For this purpose, an existing SRS resource set indication field may be redefined and used, or a new DCI field may be introduced.

[0136] The Rel-18STxMP transmission method considers two approaches: single-frequency network (SFN) and spatial division multiplexing (SDM).

[0137] The SFN (Spatial Frequency Network) method is a system in which multiple panels transmit on the same channel (or RS) as one panel transmits on. However, since each panel's UL channel (or RS) is different from the others, this is taken into consideration, and each panel transmits using a different precoder, different transmit power, and different transmit beam (i.e., the spatial relation RS indicated in UL TCI).

[0138] The SDM method is a transmission method that can be used from rank 2 or higher, and is a multi-layer transmission method in which a portion of the multi-layer is transmitted by panel 1 and the remaining layer is transmitted by panel 2. For example, in two-layer transmission, the first layer may be transmitted by panel 1 and the second layer by panel 2. Even in this case, since the UL channels of each panel are different, this is taken into consideration, and each panel is transmitted with a different precoder, different transmit power, and different transmit beam (i.e., spatial relation RS as indicated in UL TCI).

[0139] The following operations may be supported for dynamic switching between STxMP SDM and sTRP transmission.

[0140] - In the case of sTRP transmission, the maximum number of layers for sTRP transmission may be set by maxRank (or Lmax).

[0141] - In the case of the SDM method: A single maximum number of layers (separate from maxRank (or Lmax) in the case of sTRP) may be set separately for the first SRS resource set and the second SRS resource set.

[0142] The total number of PUSCH antenna ports used for SDM and sTRP may be the same, but is not limited to this.

[0143] Figure 7 illustrates a signaling procedure between a network and a UE for a PUSCH transmission / reception method according to one embodiment of the present disclosure.

[0144] Figure 7 illustrates signaling between a network (e.g., TRP 1, TRP 2) and a UE in a Multiple TRP (i.e., M-TRP or multiple cell; hereafter, all TRPs can be replaced with cells) situation to which the methods proposed in this disclosure (e.g., Examples 1 to 4-1 described later, and combinations of one or more proposed methods in Examples 1 to 4-1) can be applied.

[0145] Here, the UE / network side is illustrative and may be replaced with various devices as explained with reference to Figure 10. Figure 7 is for illustrative purposes only and does not limit the scope of this disclosure. Also, some steps shown in Figure 7 may be omitted depending on the situation and / or settings. Furthermore, the network side / UE operation in Figure 7 may refer to or utilize the uplink transmission / reception operation, M-TRP related operation, etc., described above.

[0146] In the following description, the network side may be a single base station containing multiple TRPs, or a single cell containing multiple TRPs. Alternatively, the network side may include multiple RRHs (remote radio heads) / RRUs (remote radio units). For example, an ideal / non-ideal backhaul may be set up between TRP1 and TRP2, which constitute the network side. Furthermore, although the following description is based on multiple TRPs, it may be similarly extended and applied to transmissions via multiple panels / cells, and may also be extended and applied to transmissions via multiple RRHs / RRUs, etc.

[0147] The term "panel" may be replaced with expressions such as SRS resource sets, CORESET groups (or CORESET pools), TRPs, beams, capacity value indices, antenna arrays, cells (e.g., macrocells / small cells / picocells), TPs (transmission points), and base stations (gNBs, etc.). As described above, panels and / or TRPs may be distinguished by information about CORESET groups (or CORESET pools) (e.g., CORESET index, ID).

[0148] For example, different panels may be mapped / configured / associated with different SRS resource sets / SRS resources. For example, the first panel may be mapped to SRS resource set 0, and the second panel may be mapped to SRS resource set 1. The SRS resources in SRS resource set 0 may represent the transmit antenna port of the first panel, and the SRS resources in SRS resource set 1 may represent the transmit antenna port of the second panel.

[0149] For example, if a single terminal is configured to send and receive data with multiple TRPs (or cells), this means that multiple CORESET groups (or CORESET pools) are configured for that single terminal. Such configuration of CORESET groups (or CORESET pools) may be performed by higher-layer signaling (e.g., RRC signaling).

[0150] Furthermore, the term "base station" may refer collectively to the objects that transmit and receive data with terminals. For example, the base station may be a concept that includes one or more TPs (Transmission Points), one or more TRPs (Transmission and Reception Points), etc. Also, the TPs and / or TRPs may include the base station's panel, transmission and reception unit, etc.

[0151] On the other hand, although not shown in Figure 7, for example, a terminal can report terminal capacity information to the network via / using TRP1 (and / or TRP2).

[0152] Here, in the case of a terminal supporting multiplex panel (i.e., STxMP) uplink (e.g., PUSCH) transmission, the terminal capability information may include at least one of the following: i) information about the codebook subsets supported for each first and second panel, and ii) information about the codebook subsets supported for each multiplex panel transmission (i.e., STxMP) and non-multiplex panel transmission (i.e., STRP (single TRP) transmission). Furthermore, the terminal capability information reported by the terminal to the base station may include various types of capability information as described in Examples 1 to 4-1 below.

[0153] The UE can receive configuration information from the network via / using TRP1 (and / or TRP2) (S701).

[0154] The configuration information may include information related to the network configuration (e.g., TRP configuration) and information related to M-TRP-based transmission and reception (e.g., resource allocation). In this case, the configuration information may be transmitted through higher-layer signaling (e.g., RRC signaling, MAC-CE, etc.).

[0155] Furthermore, for example, the configuration information may include information for configuring joint and / or separate DL / UL TCIs. For example, the configuration information may include a list of TCI states that provide a reference for determining the uplink transmit spatial filter of the DMRS / uplink signal (e.g., SRS) for the uplink channel (e.g., PUSCH, PUCCH).

[0156] Furthermore, for example, the configuration information may include information regarding the multiple panel (i.e., STxMP) push transmission method. For example, it may include information that sets whether or not to perform multiple panel (i.e., STxMP) transmission (e.g., the upper-layer parameter multipanelscheme), and the presence or absence of STxMP transmission and the STxMP transmission method (e.g., SDM method or SFN method) may be set based on this information.

[0157] Furthermore, for example, the configuration information may include information for setting the maximum number of layers per panel for multiplex panel (i.e., STxMP) push transmission. That is, if the UE supports two panels and multiplex panel push transmission is configured through the two panels, the configuration information may include first information / parameters for setting the maximum number of layers for the first panel (e.g., upper layer parameter maxRank1, upper layer parameter for setting the Lmax1 value, etc.) and second information / parameters for setting the maximum number of layers for the second panel (e.g., upper layer parameter maxRank2, upper layer parameter for setting the Lmax2 value, etc.). The configuration information may further include third information / parameters for setting the maximum number of layers for STRP push transmission (e.g., upper layer parameter maxRank, upper layer parameter for setting the Lmax value, etc.). The configuration information may further include codebook subset information for the first panel (e.g., upper layer parameter codebookSubset1) and codebook subset information for the second panel (e.g., upper layer parameter codebookSubset2).

[0158] Furthermore, for example, the configuration information may include information about SRS resource sets, and at least two SRS resource sets may be configured for the multiplexed panel push transmission. Here, the usage of an SRS resource set may be set to "codebook" or "non-codebook" to indicate whether a push transmission scheduled by a DCI referencing that SRS resource set is a codebook-based uplink transmission or a non-codebook-based uplink transmission.

[0159] In addition, the aforementioned configuration information may include configuration information related to STRP PUSCH transmission or multiplex panel (i.e., STxMP) PUSCH transmission as described in the proposed method later.

[0160] The terminal receives downlink control information (DCI) from the network via / using TRP1 (and / or TRP2) (S702).

[0161] The DCI may be transmitted through a downlink control channel (e.g., PDCCH) and may be scheduled as a STRP PUSCH transmission or a multiplex panel (STxMP) PUSCH transmission (i.e., including UL grant).

[0162] Furthermore, the DCI may include a sounding reference signal (SRS) resource set indicator field, a first precoding related field, and a second precoding related field.

[0163] Here, based on the value of the SRS resource set indicator field, it may be indicated whether the PUSCH transmission scheduled by the DCI is a STRP PUSCH transmission (for example, the value of the SRS resource set indicator field is 00 or 01) or a multiplex panel (STxMP) PUSCH transmission (for example, the value of the SRS resource set indicator field is 10 or 11).

[0164] Furthermore, if the PUSCH transmission is a codebook-based transmission, the first precoding-related field and the second precoding-related field may correspond to the first precoding information and number of layers field and the second precoding information and number of layers field, respectively.

[0165] Furthermore, if the PUSCH transmission is a non-codebook-based transmission, the first precoding-related field and the second precoding-related field may correspond to the first sounding reference signal (SRS) resource indicator field and the second SRS resource indicator field, respectively.

[0166] The first precoding-related field may indicate / determine a precoder and / or rank applied across one or more layers to the first panel, and the second precoding-related field may indicate / determine a precoder and / or rank applied across one or more layers to the second panel.

[0167] The terminal sends a PUSCH message to the network via / using TRP1 (and / or TRP2) (S703).

[0168] In the case of STRP PUSCH transmission, the UE can perform STRP PUSCH transmission to the network via / using a single TRP according to DCI scheduling, based on a single spatial relation RS (or UL TCI state).

[0169] Alternatively, in the case of multiplex panel (STxMP) push transmission, the UE can perform multiplex panel (STxMP) push transmission (SDM method or SFN method) to the network using multiple TRPs via DCI scheduling, based on different spatial relationships RS (or different UL TCI states) between them.

[0170] STRP transmission and STRP transmission switching method

[0171] Dynamic switching between SDM transmission and STRP transmission may be used for a single DCI based on STxMP push. For example, a base station can dynamically specify SDM transmission or STRP transmission through a DCI that includes a (2-bit) SRS resource set indicator.

[0172] Here, the maximum number of layers for a STRP transmission may be set by information related to the maximum number of ranks (maxRank) and / or information related to the maximum number of candidate SSBs (Lmax) (Option 1). Additionally or alternatively, the maximum number of layers for a STRP transmission may be set by an RRC message or the like (Option 2).

[0173] Additionally, the maximum number of layers for SDM transmissions may be set in various ways. For example, a single maximum number of layers (separate from the maximum number of layers for STRP) may be set (by the base station) and applied separately to the first and second SRS resource sets (Alternative 1). As another example, the maximum number of ranks (or the maximum number of candidate SSBs) may also be applied separately to the first and second SRS resource sets (Alternative 1a). As yet another example, separate maximum numbers of layers may be set (by the base station) for the first and second SRS resource sets (Alternative 2). As yet another example, there may be no SDM-specific settings. The maximum number of layers for STRP and the UE capacity report for SDM may be used to determine the maximum number of layers for SDM transmissions (Alternative 3). As yet another example, the maximum number of layers for options 1 and 2 described above may also be applied separately to the first and second SRS resource sets (Alternative 4).

[0174] For example, TPMI / SRI may be analyzed in various ways to ensure the same DCI size for STRP and SDM transmissions. For example, the maximum number of layers across a panel may be defined as four or less, and in the SDM-based STxMP scheme, the maximum number of layers per panel may be defined as two, but this is not limited to this.

[0175] In alternative 2, the maximum number of new ranks (maxRank) may be set by the base station via RRC messages for each panel. That is, the maximum number of ranks for panel 1 (maxRank1) and the maximum number of ranks for panel 2 (maxRank2) may be set via RRC messages. Furthermore, the maximum number of legacy ranks for STRP (i.e., non-STxMP) transmission may be set via RRC messages. For this reason, a larger maximum number of ranks may require a larger TPMI field size.

[0176] As yet another example of this disclosure, a maximum number of candidate SSBs (Lmax) may be set by the base station via RRC messages for each panel. That is, the maximum number of candidate SSBs for panel 1 (Lmax1) and the maximum number of candidate SSBs for panel 2 (Lmax2) may be set via RRC messages. Furthermore, the maximum number of legacy candidate SSBs for STRP (i.e., non-STxMP) transmission may be set via RRC messages. Thus, a larger maximum number of candidate SSBs may require a larger SRI field size.

[0177] The TPMI field size may be modified not only by the maximum number of ranks (maxRank) but also by the codebook subset restriction (CBSR). UL codebooks may be set to full-coherent, partially-coherent, or non-coherent codebooks by the CBSR. Full-coherent codebooks, partially-coherent codebooks, and non-coherent codebooks may have a higher number of precoders in that order. For example, a full-coherent codebook may contain partially-coherent and non-coherent codebooks, and a partially-coherent codebook may contain non-coherent codebooks. In other words, a larger number of precoders may require a larger TPMI field size.

[0178] The TPMI field size may be modified not only by the maximum number of ranks but also by the full power mode. For example, in full power mode 1, one or more precoders satisfying the full coherent attribute may be added to partially coherent codebooks and / or non-coherent codebooks. This may result in more precoders being directed by a codebook with full power mode 1 enabled than by a codebook with other full power modes enabled or one without a full power mode enabled. In this case, other parameters that determine the codebook size (e.g., maximum number of ranks, CBSR, etc.) may remain the same.

[0179] SRS resource set 0 may be configured for the antenna port indication corresponding to the first panel of the terminal. SRS resource set 1 may be configured for the antenna port indication corresponding to the second panel of the terminal. That is, the first panel may correspond to SRS resource set 0, and the second panel may correspond to SRS resource set 1.

[0180] In a basic wireless communication system, the DCI for STxMP transmission of a CB (codebook-based) pusher may include two TPMI fields and two SRI fields, while the DCI for STxMP transmission of a NCB (non-codebook-based) pusher may include two SRI fields.

[0181] The following describes a method for determining the final DCI payload size by first calculating the DCI payload size using the transmission panel, and then selecting the maximum payload size.

[0182] Figure 8 is a diagram illustrating the uplink transmission operation of a terminal in a wireless communication system to which this disclosure can be applied.

[0183] In describing this disclosure, uplink transmission may include at least one of the following: a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or an SRS.

[0184] The terminal can receive downlink control information (DCI) from the base station, which includes at least one of the first transmit precoding matrix indicator (TPMI) field or the second TPMI field (S810).

[0185] Here, the first TPMI field may be expressed as the first precoding information and layer count field, and the second TPMI field may be expressed as the second precoding information and layer count field (or the second precoding information field). The terminal can then receive configuration information related to the codebook-based uplink transmission from the base station via an RRC (radio resource control) message.

[0186] Furthermore, one or more uplink channels corresponding to each panel (i.e., each SRS resource set) may be scheduled through a single DCI, but is not limited to this. For example, if each of two uplink channels transmits separately for each SRS resource set, one uplink channel may be scheduled by the first DCI and the other uplink channel by the second DCI.

[0187] As described above, the first TPMI field size included in DCI may be determined to be the maximum value among the first bit size, second bit size, and third bit size. The first bit size, second bit size, and third bit size, respectively, may be based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

[0188] Here, the type of codebook subset may be one of a fully coherent codebook, a partially coherent codebook, or a non-coherent codebook. That is, each of the types of the first codebook subset and the second codebook subset described later may be one of a fully coherent codebook, a partially coherent codebook, or a non-coherent codebook.

[0189] Furthermore, the type of full power mode may be one of full power mode 1, full power mode 2, or non-full power mode. That is, each of the first type of full power mode and the second type of full power mode described later may be one of full power mode 1, full power mode 2, or non-full power mode.

[0190] As an example of this disclosure, the presence or absence of STxMP transmission may be indicated by an SRS resource set indicator field included in the DCI. For example, STxMP transmission may not be indicated based on the SRS resource set indicator field indicating either a first SRS resource set or a second SRS resource set. That is, if the SRS resource set indicator field indicates either a first SRS resource set or a second SRS resource set, an uplink transmission based on the indicated first SRS resource set or second SRS resource set may be performed. STxMP transmission may be indicated based on the SRS resource set indicator field indicating both a first SRS resource set and a second SRS resource set. That is, uplink transmissions corresponding to the first SRS resource set and the second SRS resource set, respectively, may be performed simultaneously.

[0191] For example, the first bit size may relate to a first case where STxMP transmission is not instructed, and the codebook subset type, the maximum number of ranks, and the full power mode type are the first codebook subset type, the maximum number of ranks, and the first full power mode set for the first sounding reference signal (SRS) resource set. That is, if STxMP is not instructed, the first bit size may be determined based on the first codebook subset type, the maximum number of ranks, and the first full power mode set for the first SRS resource set.

[0192] As an example, the second bit size may relate to a second case where STxMP transmission is not instructed, and the codebook subset type, the maximum rank count, and the full power mode type are the second codebook subset type, the maximum rank count, and the second full power mode set for the second SRS resource set. That is, if STxMP is not instructed, the second bit size may be determined based on the second codebook subset type, the maximum rank count, and the second full power mode set for the second SRS resource set.

[0193] As an example, the size of the third bit may relate to a third case in which an STxMP transmission is instructed and the codebook subset type, the maximum rank count, and the full power mode type are the first codebook subset type, the maximum rank count, and the first full power mode set for the first SRS resource set. That is, when STxMP is instructed, the size of the third bit may be determined based on the first codebook subset type, the maximum rank count, and the first full power mode set for the first SRS resource set.

[0194] As an example, the second TPMI field may be determined to be the size of the fourth bit. The size of the fourth bit may relate to a fourth case in which an STxMP transmission is instructed and the codebook subset type, the maximum rank count, and the full power mode type are the second codebook subset type, the maximum rank count, and the second full power mode set for the second SRS resource set. That is, when an STxMP transmission is instructed, the size of the fourth bit may be determined based on the second codebook subset type, the maximum rank count, and the second full power mode set for the second SRS resource set.

[0195] Additionally, the DCI may include a first SRS resource indicator (SRI) field and a second SRI field. For example, the size of the first SRI field may be determined to be the maximum of the 5th bit size, the 6th bit size, and the 7th bit size. The 5th bit size, the 6th bit size, and the 7th bit size, respectively, may be based on whether STxMP transmission is instructed and the number of selectable SRS resources in the SRS resource set.

[0196] For example, the size of the 5th bit may relate to the number of selectable SRS resources in the first SRS resource set, based on the assumption that STxMP transmission is not instructed. The size of the 6th bit may relate to the number of selectable SRS resources in the second SRS resource set, based on the assumption that STxMP transmission is not instructed. The size of the 7th bit may relate to the number of selectable SRS resources in the first SRS resource set, based on the assumption that STxMP transmission is instructed.

[0197] Additionally, the size of the second SRI field may be related to the number of selectable SRS resources in the second SRS resource set, based on the instructions for STxMP transmission.

[0198] The terminal can perform uplink transmission based on DCI (S820). That is, the terminal can perform uplink transmission through the SRS resource set indicator field, the first TPMI field, the second TPMI field, the first SRI field, and the second SRI field included in DCI.

[0199] As an example, if STxMP transmission is indicated by the SRS resource set indicator field, the terminal can perform uplink transmissions related to the first / second SRS resource set using the STxMP method through the first / second TPMI field and the first / second SRI field. As another example, if STxMP transmission is not indicated by the SRS resource set indicator field, the terminal can perform uplink transmissions related to the first SRS resource set (or second SRS resource set) through the first TPMI field (or second TPMI field) and the first SRI field (or second SRI field).

[0200] The method performed by the terminal illustrated in Figure 8 may be performed by the first device 100 in Figure 10. For example, one or more processors 102 of the first device 100 in Figure 10 can receive a DCI including at least one of the first TPMI field or the second TPMI field from a base station via one or more transceivers 106. One or more processors 102 can perform uplink transmission based on the DCI.

[0201] When executed by one or more processors 102, memory 104 can store instructions for performing the method described in the example in Figure 8.

[0202] Figure 9 is a diagram illustrating the uplink reception operation of a base station in a wireless communication system to which this disclosure can be applied.

[0203] The base station can transmit a DCI to the terminal that includes at least one of the first TPMI field or the second TPMI field (S910).

[0204] Before transmitting the DCI, the base station may send configuration information related to codebook-based uplink transmission and / or STxMP-related configuration information to the terminal via an RRC message. The configuration of each field included in the DCI has been explained with reference to Figure 8, so a redundant explanation will be omitted.

[0205] The base station can perform uplink reception based on DCI (S920).

[0206] The method performed by the base station as illustrated in Figure 9 may be performed by the second device 200 in Figure 10. For example, one or more processors 202 of the second device 200 in Figure 10 can transmit a DCI including at least one of the first TPMI field or the second TPMI field to a terminal via one or more transceivers 206. One or more processors 202 can perform uplink reception based on the DCI.

[0207] Furthermore, one or more memories 204 of the second device 200 can store instructions for performing the method described in the example in Figure 9, when executed by one or more processors 202.

[0208] The following section specifically describes how to determine the DCI payload size based on factors such as whether or not STxMP is applied and the panel's capacity, as explained with reference to Figures 8 and 9.

[0209] Example 1

[0210] Example 1 relates to a method related to the DCI payload size used during codebook-based uplink transmission. Example 1-1 relates to the TPMI field size, Example 1-2 relates to the SRI field, and Example 1-3 relates to the TPMI and SRI fields when UL beam switching is applied.

[0211] Example 1-1

[0212] In a basic wireless communication system, TPMI field 1 (or the first TPMI field) may be used for codebook indication of panel 1 during non-STxMP transmission, or for codebook indication of panel 1 during STxMP transmission. Furthermore, in a basic wireless communication system, TPMI field 2 (or the second TPMI field) may be used for codebook indication of panel 2 during STxMP transmission.

[0213] As described above, since Panel 1 corresponds to SRS Resource Set 0 and Panel 2 corresponds to SRS Resource Set 1, STxMP transmission or non-STxMP transmission may be indicated through the DCI's SRS Resource Set Selection field (or SRS Resource Set Indicator field). For example, if the SRS Resource Set Indicator field value is 00, this can mean non-STxMP transmission using Panel 1. If the SRS Resource Set Indicator field value is 01, this can mean non-STxMP transmission using Panel 2. If the SRS Resource Set Indicator field value is 10, this can mean STxMP transmission using both Panel 1 and Panel 2.

[0214] Therefore, the size of TPMI field 1 may be determined to be the maximum of the following: 1) the bit size (B1) that takes into account the CBSR, the maximum number of ranks, and the full power mode applied to panel 1 during non-STxMP transmission; 2) the bit size (B2) that takes into account the CBSR, the maximum number of ranks, and the full power mode applied to panel 2 during non-STxMP transmission; and iii) the bit size (B3) that takes into account the CBSR, the maximum number of ranks, and the full power mode applied to panel 1 during STxMP transmission. The size of TPMI field 2 may also be determined to be the bit size (B4) that takes into account the CBSR, the maximum number of ranks, and the full power mode applied to panel 2 during STxMP transmission.

[0215] As an additional or alternative, the size of TPMI field 1 may be determined to be the maximum value among B1 and B3, and the size of TPMI field 2 may be determined to be the maximum value among B2 and B4.

[0216] To accommodate the diversity of terminal implementations, the base station can separate the terminal into the following four cases and transmit case-specific parameters to the terminal via RRC messages, MAC-CE, and / or DCI. That is, each parameter value may be set separately according to the following four cases.

[0217] - Case 1: CBSR applied to Panel 1 during non-STxMP transmission, maximum rank count, full power mode

[0218] - Case 2: CBSR applied to Panel 2 during non-STxMP transmission, maximum number of ranks, full power mode

[0219] - Case 3: CBSR applied to panel 1 during STxMP transmission, maximum number of ranks, full power mode

[0220] - Case 4: CBSR applied to panel 2 during STxMP transmission, maximum number of ranks, full power mode

[0221] Examples 1-2

[0222] In a basic wireless communication system, when CB PUSCH transmission is configured, SRI field 1 may be used to indicate the SRS resource of panel 1 (i.e., SRS resource set 0 corresponding to panel 1) during non-STxMP transmission, SRS resource of panel 2 (i.e., SRS resource set 1 corresponding to panel 2) during non-STxMP transmission, or SRS resource of panel 1 (i.e., SRS resource set 0 corresponding to panel 1) during STxMP transmission. Furthermore, in a basic wireless communication system, when CB PUSCH transmission is configured, SRI field 2 may be used to indicate the SRS resource of panel 2 (i.e., SRS resource set 1 corresponding to panel 2) during STxMP transmission.

[0223] To accommodate the diversity of terminal implementations, the base station can separate the terminal into the following four cases and transmit case-specific parameters to the terminal via RRC messages, MAC-CE, and / or DCI. That is, each parameter value may be set separately according to the following four cases.

[0224] - Case 1: Number of selectable SRS resources in Panel 1 (i.e., SRS resource set 0) when transmitting without STxMP

[0225] - Case 2: Number of selectable SRS resources in Panel 2 (i.e., SRS Resource Set 1) when transmitting without STxMP

[0226] - Case 3: Number of selectable SRS resources on Panel 1 during STxMP transmission

[0227] - Case 4: Number of selectable SRS resources on Panel 2 when transmitting via STxMP

[0228] As a result, the field size of SRI field 1 may be determined to be the maximum of the number of selectable SRS resources in panel 1 (i.e., SRS resource set 0) when transmitting in non-STxMP mode (B1), the number of selectable SRS resources in panel 2 (i.e., SRS resource set 1) when transmitting in non-STxMP mode (B2), and the number of selectable SRS resources in panel 1 (i.e., SRS resource set 0) when transmitting in STxMP mode (B3). Similarly, the field size of SRI field 2 may be determined to be the number of selectable SRS resources in panel 2 (i.e., SRS resource set 1) when transmitting in STxMP mode (B4).

[0229] As an additional or alternative, the size of SR1 field 1 may be determined to be the maximum value among B1 and B3, and the size of SRI field 2 may be determined to be the maximum value among B2 and B4.

[0230] Examples 1-3

[0231] In one embodiment of this disclosure, the UL beam transmitted by STxMP panel 1 and the UL beam transmitted by STxMP2 may be switched with each other due to terminal rotation (UE rotation), and the switching of the UL beams may be dynamically instructed by MAC-CE or DCI.

[0232] In describing this disclosure, the UL beam may correspond to a UL TCI state or a spatial relation RS. That is, the UL beam transmitted by panel 1 may correspond to a UL beam, UL TCI state, or spatial relation RS applied to an SRS resource in SRS resource set 0, and the UL beam transmitted by panel 2 may correspond to a UL beam, UL TCI state, or spatial relation RS applied to an SRS resource in SRS resource set 1.

[0233] Here, TPMI field 1 may be used for the codebook indication of STxMP panel 2, and TPMI field 2 may be used for the codebook indication of STxMP panel 1. When dynamic beam switching is considered, TPMI field 1 may be determined to the maximum value of B1, B2, B3, and B4 in Example 1-1, and TPMI field 2 may be determined to the maximum value of B3 and B4 in Example 1-1. However, this is only one example, and either TPMI field 1 or TPMI field 2 may be determined to the maximum value of B1, B2, B3, and B4 in Example 1-1.

[0234] As yet another example of this disclosure, suppose dynamic switching between the UL beams of panel 1 and panel 2 is supported for STxMP transmission. In this case, the field size of SRI field 1 may be determined to be the maximum of the number of selectable SRS resources of panel 1 (i.e., SRS resource set 0) during non-STxMP transmission, the number of selectable SRS resources of panel 2 (i.e., SRS resource set 1) during non-STxMP transmission, the number of selectable SRS resources of panel 1 (i.e., SRS resource set 0) during STxMP transmission, and the number of selectable SRS resources of panel 2 (i.e., SRS resource set 1) during STxMP transmission.

[0235] The field size of SRI field 2 may be determined to be the maximum of the number of selectable SRS resources in panel 1 (i.e., SRS resource set 0) and the number of selectable SRS resources in panel 2 (i.e., SRS resource set 1) when STxMP transmission is performed.

[0236] Example 2

[0237] Example 2 relates to a method concerning DCI payload size used during non-codebook-based uplink transmissions.

[0238] The base station can be divided into the following four cases and transmit case-specific parameters to the terminal via RRC messages, MAC-CE, and / or DCI. That is, each parameter value may be set separately according to the following four cases.

[0239] - Case 1: Bit size (B1) considering the number of selectable SRS resources and the maximum number of existing candidate SSBs (Lmax) applied to panel 1 (i.e., SRS resource set 0) when transmitting without STxMP.

[0240] - Case 2: Bit size (B2) considering the number of selectable SRS resources and the maximum number of existing candidate SSBs (Lmax) applied to panel 2 (i.e., SRS resource set 1) when transmitting non-STxMP.

[0241] - Case 3: Bit size (B3) considering the number of selectable SRS resources and the maximum number of candidate SSBs (Lmax1) applied to panel 1 (i.e., SRS resource set 0) when transmitting in STxMP mode.

[0242] - Case 4: Bit size (B4) considering the number of selectable SRS resources and the maximum number of candidate SSBs (Lmax2) applied to panel 2 (i.e., SRS resource set 1) when transmitting in STxMP mode.

[0243] If dynamic switching of the UL beam transmitted by STxMP panel 1 and the UL beam transmitted by STxMP panel 2 is possible, then in the case of NCB PUSCH, SRS field 1 may be determined to the maximum value among B1, B2, B3, and B4, and SRS field 2 may be determined to the maximum value among B3 and B4.

[0244] For the purposes of this disclosure, UL beams may correspond to UL TCI states or spatial relation RSs. That is, a UL beam transmitted by panel 1 may correspond to a UL beam, UL TCI state, or spatial relation RS applied to an SRS resource in SRS resource set 0, and a UL beam transmitted by panel 2 may correspond to a UL beam, UL TCI state, or spatial relation RS applied to an SRS resource in SRS resource set 1.

[0245] In Examples 1 and 2, the maximum number of ranks in panel 1 (maxRank1) and the maximum number of ranks in panel 2 (maxRank12) may be the same or the same as a predefined maximum number of ranks. In Examples 1 and 2, the CBSR of panel 1 and the CBSR of panel 2 may be the same or the same as a predefined CBSR. In Examples 1 and 2, the maximum number of candidate SSBs in panel 1 (Lmax1) and the maximum number of candidate SSBs in panel 2 (Lmax1) may be the same or the same as a predefined maximum number of SSBs.

[0246] The embodiments described above may be combined and linked. Furthermore, the parameters and methods defined / set / instructed in the embodiments described above may be set / instructed or defined by the base station to the terminal.

[0247] As demonstrated in the above embodiment, when the two transmitting panel characteristics differ, even when STxMP is applied, the DCI payload size for scheduling UL transmission may be fixed regardless of which panel is used for UL transmission.

[0248] General devices to which disclosure is applicable

[0249] Figure 10 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0250] Referring to Figure 10, the first device 100 and the second device 200 can send and receive wireless signals using various wireless connectivity technologies (e.g., LTE, NR).

[0251] The first device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memories 104 and / or the transceivers 106 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed in this disclosure.

[0252] For example, the processor 102 may process the information in the memory 104 to generate first information / signal, and then transmit a wireless signal containing the first information / signal from the transceiver 106. Alternatively, after the processor 102 receives a wireless signal containing second information / signal from the transceiver 106, it may store the information obtained from signal processing of the second information / signal in the memory 104.

[0253] Memory 104 may be coupled to processor 102 and can store various information related to the operation of processor 102. For example, memory 104 may store software code including instructions for performing some or all of the processes controlled by processor 102, or for performing the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed herein. Here, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to embody wireless communication technology (e.g., LTE, NR). Transceiver 106 may be coupled to processor 102 and can transmit and / or receive radio signals via one or more antennas 108. Transceiver 106 may include a transmitter and / or receiver. Transceiver 106 may be replaced with an RF (Radio Frequency) unit. In the present invention, device may mean communication modem / circuit / chip.

[0254] 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 may control the memory 204 and / or the transceiver 206 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signals and then transmit a radio signal containing the third information / signals from the transceiver 206. Alternatively, the processor 202 may receive a radio signal containing fourth information / signals from the transceiver 206 and then store information obtained from signal processing of the fourth information / signals in the memory 204. The memory 204 may be linked to the processor 202 and can store various information related to the operation of the processor 202. For example, memory 204 may store software code that includes instructions for performing some or all of the processes controlled by processor 202, or for executing the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed herein. Here, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to embody wireless communication technology (e.g., LTE, NR). Transceiver 206 may be coupled with processor 202 and can transmit and / or receive radio signals via one or more antennas 208. Transceiver 206 may include a transmitter and / or receiver. Transceiver 206 may be replaced with an RF unit. In the present invention, device may mean communication modem / circuit / chip.

[0255] The hardware elements of devices 100,200 are described in more detail below. However, one or more protocol layers may be embodied by one or more processors 102,202. For example, one or more processors 102,202 can embodied one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102,202 can generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) by means of the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed in this disclosure. One or more processors 102,202 can generate messages, control information, data, or information by means of the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed in this disclosure. One or more processors 102,202 can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information by means of the functions, procedures, suggestions, and / or methods disclosed in this disclosure and provide them 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 can acquire PDUs, SDUs, messages, control information, data, or information by means of the descriptions, functions, procedures, suggestions, methods, and / or operation sequence diagrams disclosed in this disclosure.

[0256] The one or more processors 102, 202 may be referred to as controllers, microcontrollers, microprocessors or microcomputers. The one or more processors 102, 202 may be embodied by hardware, firmware, software, or a combination thereof. By way of 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 the one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure may be embodied using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, and the like. Firmware or software configured to execute the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure may be included in the one or more processors 102, 202, or stored in one or more memories 104, 204 and executed by the one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure may be embodied by firmware or software in the form of codes, instructions and / or a set of instructions.

[0257] One or more memories 104,204 may be connected to one or more processors 102,202 and can store various forms of data, signals, messages, information, programs, code, instructions and / or commands. One or more memories 104,204 may consist of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media and / or combinations thereof. One or more memories 104,204 may be located inside and / or outside of one or more processors 102,202. Furthermore, one or more memories 104,204 may be connected to one or more processors 102,202 by various technologies such as wired or wireless connections.

[0258] The one or more transceivers 106, 206 can transmit user data, control information, radio signals / channels, etc. mentioned in the methods and / or operational flowcharts of the present disclosure to one or more other devices. The one or more transceivers 106, 206 can receive, from one or more other devices, user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure. For example, the one or more transceivers 106, 206 may be coupled to one or more processors 102, 202 and can transmit and receive radio signals. For example, the one or more processors 102, 202 can control the one or more transceivers 106, 206 to transmit user data, control information or radio signals to one or more other devices. Further, the one or more processors 102, 202 can control the one or more transceivers 106, 206 to receive user data, control information or radio signals from one or more other devices. Further, the one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208, and the one or more transceivers 106, 206 may be configured to transmit and receive, via the one or more antennas 108, 208, user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure. In the present disclosure, the one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). The one or more transceivers 106, 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals, in order to process the received user data, control information, radio signals / channels, etc. using the one or more processors 102, 202. The one or more transceivers 106, 206 may convert user data, control information, radio signals / channels, etc. processed using the one or more processors 102, 202 from baseband signals to RF band signals. To this end, the one or more transceivers 106, 206 can include (analog) oscillators and / or filters.

[0259] The embodiments described above are combinations of the components and features of the present disclosure in a predetermined form. Each component or feature should be considered optional unless otherwise explicitly mentioned. Each component or feature may be implemented in a form that does not combine with other components or features. It is also possible to combine some components and / or features to constitute embodiments of the present disclosure. The order of operations described in embodiments of the present disclosure may be changed. Some components or features of one embodiment may be included in other embodiments, or replaced by corresponding components or features of other embodiments. It is clear that claims that do not have an explicit reference relationship in the claims may be combined to constitute embodiments, or may be included as new claims by amendment after filing.

[0260] It will be obvious to those skilled in the art that this disclosure can be embodied in other specific forms, provided that the essential features of this disclosure are not deviated from. Therefore, the above-mentioned detailed description should not be constrained in any way and should be considered illustrative. The scope of this disclosure should be determined by a reasonable interpretation of the attached claims, and any modifications within the equivalent scope of this disclosure are included within the scope of this disclosure.

[0261] The scope of this disclosure includes software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) that cause an apparatus or computer to perform operations according to the methods of various embodiments, and non-transitory computer-readable medium on which such software or instructions are stored and executable on the apparatus or computer. Instructions available for programming a processing system that performs the features described in this disclosure may be stored on / in a storage medium or computer-readable storage medium, and the features described in this disclosure may be embodied using a computer program product including such storage medium. The storage medium may 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 may include non-volatile memory such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. Memory optionally includes one or more storage devices located remotely from the processor. Memory, or alternatively, non-volatile memory devices within memory, include non-transitory computer-readable storage medium. The features described in this disclosure may be stored on any one of the machine-readable media and integrated into software and / or firmware that can control the hardware of the processing system and cause the processing system to interact with other mechanisms that utilize the results relating to the embodiments of this disclosure. Such software or firmware may include, but is not limited to, application code, device drivers, operating systems and execution environments / containers.

[0262] Here, the wireless communication technologies embodied in devices 100 and 200 of this disclosure may include, in addition to LTE, NR, and 6G, Narrowband Internet of Things (NB-IoT) for low-power communication. In this case, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be embodied by standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the names mentioned above. Additionally or alternatively, the wireless communication technologies embodied in devices 100 and 200 of this disclosure may communicate based on LTE-M technology. In this case, 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 may be embodied by at least one of various standards, including 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or alternatively, wireless communication technologies embodied in devices 100,200 of this disclosure may include at least one of ZigBee, Bluetooth (registered trademark), and Low Power Wide Area Network (LPWAN), and is not limited to the names mentioned above. As an example, ZigBee technology can generate personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be called by various names.

[0263] [Industrial applicability] Although the method proposed in this disclosure has been described primarily in terms of its application to 3GPP LTE / LTE-A and 5G systems, it is applicable to a variety of other wireless communication systems as well.

[0264] [Claims when filing an international application] [Claim 1] A method performed by a terminal in a wireless communication system, The steps include receiving downlink control information (DCI) from a base station, which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field, The process includes the step of performing an uplink transmission based on the DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are determined by a method based on whether or not simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode. [Claim 2] The first bit size relates to a first case in which the STxMP transmission is not instructed, and the codebook subset type, the maximum number of ranks, and the full power mode type are the first codebook subset type, the maximum number of ranks, and the first full power mode set for the first sounding reference signal (SRS) resource set. The method according to claim 1, wherein the second bit size relates to a second case in which the STxMP transmission is not instructed and the codebook subset type, the maximum rank number, and the full power mode type are the second codebook subset type, the maximum rank number, and the second full power mode set for the second SRS resource set. [Claim 3] The method according to claim 1, wherein the third bit size relates to a third case in which the STxMP transmission is instructed and the codebook subset type, the maximum rank number, and the full power mode type are the first codebook subset type, the maximum rank number, and the first full power mode set for the first SRS resource set. [Claim 4] The size of the second TPMI field is determined to be the size of the fourth bit. The method according to claim 1, wherein the fourth bit size relates to a fourth case in which the STxMP transmission is instructed and the codebook subset type, the maximum rank number, and the full power mode type are the second codebook subset type, the maximum rank number, and the second full power mode set for the second SRS resource set. [Claim 5] The method according to claim 1, wherein the presence or absence of STxMP transmission is indicated by an SRS resource set indicator field included in the DCI. [Claim 6] Based on the fact that either the first SRS resource set or the second SRS resource set is indicated by the SRS resource set indicator field, the STxMP transmission is not instructed. The method according to claim 5, wherein the STxMP transmission is instructed based on the fact that both the first SRS resource set and the second SRS resource set are instructed by the SRS resource set indicator field. [Claim 7] The DCI includes a first SRS resource indicator (SRI) field and a second SRI field, The size of the first SRI field is determined to be the maximum of the 5th bit size, the 6th bit size, and the 7th bit size. The method according to claim 1, wherein the fifth bit size, the sixth bit size, and the seventh bit size are each based on whether or not the STxMP transmission is instructed and the number of selectable SRS resources in the SRS resource set. [Claim 8] The fifth bit size is related to the number of selectable SRS resources in the first SRS resource set, based on the fact that the STxMP transmission is not instructed. The size of the sixth bit is related to the number of selectable SRS resources in the second SRS resource set, based on the fact that the STxMP transmission is not instructed. The method according to claim 7, wherein the seventh bit size relates to the number of selectable SRS resources in the first SRS resource set, based on the instruction that the STxMP transmission is performed. [Claim 9] The method according to claim 7, wherein the size of the second SRI field is related to the number of selectable SRS resources in the second SRS resource set, based on the instruction that the STxMP transmission is made. [Claim 10] The method according to claim 1, wherein the configuration information related to the codebook-based uplink transmission is transmitted from the base station to the terminal via an RRC (radio resource control) message. [Claim 11] The method according to claim 1, wherein the uplink transmission includes at least one of a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or an SRS. [Claim 12] A terminal on a wireless communication system, One or more transceivers, one or more processors coupled to the one or more transceivers, the one or more processors are configured to: receive downlink control information (DCI) including at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field from a base station via the one or more transceivers, and perform uplink transmission based on the DCI, the size of the first TPMI field is determined as a maximum value among a first bit size, a second bit size, and a third bit size, each of the first bit size, the second bit size, and the third bit size is based on whether simultaneous transmission across multi-panels (STxMP) transmission is indicated, a type of codebook subset, a maximum number of ranks, and a type of full power mode. A terminal. [Claim 13] A method performed by a base station in a wireless communication system, comprising: transmitting downlink control information (DCI) including at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field to a terminal; and performing uplink reception based on the DCI, the size of the first TPMI field is determined as a maximum value among a first bit size, a second bit size, and a third bit size, The first bit size, the second bit size, and the third bit size are determined by a method based on whether or not simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode. [Claim 14] A base station on a wireless communication system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Downlink control information (DCI), which includes at least one of the first transmit precoding matrix indicator (TPMI) field or the second TPMI field, is transmitted to the terminal through one or more transceivers, and It is configured to perform uplink reception based on the aforementioned DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are each based on whether or not simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode, respectively, of the base station. [Claim 15] A processing device configured to control a terminal in a wireless communication system, One or more processors, The system comprises one or more computer memories that are operably connected to one or more processors and store instructions for performing operations based on execution by the one or more processors, The aforementioned operation is, The operation of receiving downlink control information (DCI) from a base station, which includes at least one of the first transmit precoding matrix indicator (TPMI) field or the second TPMI field, This includes an operation to perform an uplink transmission based on the DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are each based on whether or not simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode of a processing device. [Claim 16] One or more non-transitory computer-readable media for storing one or more instructions, The aforementioned one or more instructions are executed by one or more processors, and the device performing uplink transmission in the wireless communication system is, The base station receives downlink control information (DCI) which includes at least one of the first transmit precoding matrix indicator (TPMI) field or the second TPMI field, and It is configured to perform uplink transmission based on the aforementioned DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are each computer-readable media based on whether or not simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

Claims

1. A method performed by a terminal in a wireless communication system, The steps include receiving downlink control information (DCI) from a base station, which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field, The process includes the step of performing an uplink transmission based on the DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are determined by a method based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

2. The first bit size relates to a first case in which the STxMP transmission is not instructed, and the codebook subset type, the maximum number of ranks, and the full power mode type are the first codebook subset type, the maximum number of ranks, and the first full power mode set for the first sounding reference signal (SRS) resource set, The method according to claim 1, wherein the second bit size relates to a second case in which the STxMP transmission is not instructed and the codebook subset type, the maximum number of ranks, and the full power mode type are the second codebook subset type, the maximum number of ranks, and the second full power mode set for the second SRS resource set.

3. The method according to claim 1, wherein the third bit size relates to a third case in which the STxMP transmission is instructed and the codebook subset type, the maximum number of ranks, and the full power mode type are the first codebook subset type, the maximum number of ranks, and the first full power mode set for the first SRS resource set.

4. The size of the second TPMI field is determined to be the size of the fourth bit. The method according to claim 1, wherein the fourth bit size relates to a fourth case in which the STxMP transmission is instructed and the codebook subset type, the maximum number of ranks, and the full power mode type are the second codebook subset type, the maximum number of ranks, and the second full power mode set for the second SRS resource set.

5. The method according to claim 1, wherein the presence or absence of STxMP transmission is indicated by an SRS resource set indicator field included in the DCI.

6. Based on the fact that either the first SRS resource set or the second SRS resource set is indicated by the SRS resource set indicator field, the STxMP transmission is not instructed. The method according to claim 5, wherein the STxMP transmission is instructed based on the fact that both the first SRS resource set and the second SRS resource set are instructed by the SRS resource set indicator field.

7. The DCI includes a first SRS resource indicator (SRI) field and a second SRI field, The size of the first SRI field is determined to be the maximum value among the 5th bit size, the 6th bit size, and the 7th bit size. The method according to claim 1, wherein the fifth bit size, the sixth bit size, and the seventh bit size are each based on whether or not the STxMP transmission is instructed and the number of selectable SRS resources in the SRS resource set.

8. The fifth bit size is related to the number of selectable SRS resources in the first SRS resource set, based on the fact that the STxMP transmission is not instructed. The sixth bit size is related to the number of selectable SRS resources in the second SRS resource set, based on the fact that the STxMP transmission is not instructed. The method according to claim 7, wherein the seventh bit size relates to the number of selectable SRS resources in the first SRS resource set, based on the instruction for the STxMP transmission.

9. The method according to claim 7, wherein the size of the second SRI field is related to the number of selectable SRS resources in the second SRS resource set, based on the instruction that the STxMP transmission is made.

10. The method according to claim 1, wherein the configuration information related to the codebook-based uplink transmission is transmitted from the base station to the terminal via an RRC (radio resource control) message.

11. The method according to claim 1, wherein the uplink transmission includes at least one of a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or an SRS.

12. A terminal on a wireless communication system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Downlink control information (DCI) including at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field is received from the base station through one or more transceivers, and It is configured to perform uplink transmission based on the aforementioned DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are each based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode of a terminal.

13. A method performed by a base station in a wireless communication system, The steps include transmitting downlink control information (DCI) to the terminal, which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field, The process includes the step of receiving an uplink based on the DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are determined by a method based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

14. A base station on a wireless communication system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Downlink control information (DCI), which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field, is transmitted to the terminal through one or more transceivers, and It is configured to perform uplink reception based on the aforementioned DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size are each based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode, respectively.

15. A processing device configured to control a terminal in a wireless communication system, One or more processors, The system comprises one or more computer memories that are operably connected to one or more processors and store instructions for performing operations based on execution by the one or more processors, The aforementioned operation is, The operation of receiving downlink control information (DCI) from a base station, which includes at least one of a first transmit precoding matrix indicator (TPMI) field or a second TPMI field, This includes an operation to perform an uplink transmission based on the DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. A processing device in which the first bit size, the second bit size, and the third bit size are each based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

16. One or more non-transitory computer-readable media for storing one or more instructions, The one or more instructions are executed by one or more processors, and the device performing uplink transmission in the wireless communication system is, The base station receives downlink control information (DCI) which includes at least one of the first transmit precoding matrix indicator (TPMI) field or the second TPMI field, and It is configured to perform uplink transmission based on the aforementioned DCI, The size of the first TPMI field is determined to be the maximum value among the first bit size, the second bit size, and the third bit size. The first bit size, the second bit size, and the third bit size, respectively, are computer-readable media based on whether simultaneous transmission across multi-panels (STxMP) transmission is instructed, the type of codebook subset, the maximum number of ranks, and the type of full power mode.

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