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

Abstract

Methods and apparatus for uplink transmission and reception in a wireless communication system are disclosed. A method according to one embodiment of the present disclosure may comprise the steps of: receiving, from a base station, PUSCH-related configuration information on a specific BWP, the configuration information comprising first information on whether dynamic waveform switching for a PUSCH is supported; receiving DCI for scheduling the PUSCH from the base station; and transmitting the PUSCH to the base station.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving an uplink channel / signal in the wireless communication system. Background Art

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

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

[0004] Technical issues

[0005] One technical object of the present disclosure is to provide a method and apparatus for dynamically switching / changing a waveform for uplink transmission.

[0006] In addition, a technical object of the present disclosure is to provide a method and apparatus for configuring whether an operation for dynamically switching / changing a waveform for uplink transmission is supported.

[0007] In addition, a technical object of the present disclosure is to provide a method and apparatus for dynamically transmitting / receiving uplink transmission as a waveform.

[0008] The technical objectives to be achieved by the present disclosure are not limited to the above-mentioned technical objectives, and those skilled in the art can clearly understand other technical objectives not described herein through the following description.

[0009] Technical Solution

[0010] According to an aspect of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system may include the following steps: receiving configuration information related to a physical uplink shared channel (PUSCH) for a specific bandwidth part (BWP) from a base station, wherein the configuration information includes first information about whether dynamic waveform switching is supported for the PUSCH; receiving downlink control information (DCI) for scheduling the PUSCH from the base station; and sending the PUSCH to the base station. Based on the DCI including second information for indicating whether transform precoding for the PUSCH is enabled or disabled when the dynamic waveform switching is supported, it can be determined whether to apply the transform precoding to the PUSCH based on the second information.

[0011] According to an additional aspect of the present disclosure, a method performed by a base station in a wireless communication system may include the following steps: sending configuration information related to a physical uplink shared channel (PUSCH) for a specific bandwidth part (BWP) to a user equipment (UE), wherein the configuration information includes first information about whether dynamic waveform switching is supported for the PUSCH; sending downlink control information (DCI) for scheduling the PUSCH to the UE; and receiving the PUSCH from the UE. Based on the DCI including second information for indicating whether transform precoding for the PUSCH is enabled or disabled when the dynamic waveform switching is supported, it can be determined whether to apply the transform precoding to the PUSCH based on the second information.

[0012] Technical Effects

[0013] According to an embodiment of the present disclosure, the performance of uplink transmission and reception may be improved by dynamically switching / changing the waveform for uplink transmission.

[0014] In addition, according to an embodiment of the present disclosure, since whether dynamic waveform switching is supported can be determined before dynamic waveform indication through control information, ambiguity regarding the size of control information between a UE and a base station can be prevented.

[0015] Effects achievable by the present disclosure are not limited to the above-described effects, and other effects not described herein may be clearly understood by those skilled in the art through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are included as a part of the detailed description for understanding the present disclosure, provide embodiments of the present disclosure and describe technical features of the present disclosure through the detailed description.

[0017] Figure 1 The structure of a wireless communication system to which the present disclosure can be applied is illustrated.

[0018] Figure 2 The frame structure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0019] Figure 3 A resource grid in a wireless communication system to which the present disclosure can be applied is illustrated.

[0020] Figure 4 The physical resource blocks in a wireless communication system to which the present disclosure can be applied are illustrated.

[0021] Figure 5 The time slot structure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0022] Figure 6 Physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the physical channels are illustrated.

[0023] Figure 7 The random access procedure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0024] Figure 8 A two-step random access procedure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0025] Fig. 9 A signaling method for uplink transmission and reception methods according to one embodiment of the present disclosure is illustrated.

[0026] Fig.10 is a diagram illustrating an operation of a UE for an uplink transmission and reception method according to one embodiment of the present disclosure.

[0027] Fig.11 is a diagram illustrating an operation of a base station for an uplink transmission and reception method according to one embodiment of the present disclosure.

[0028] Fig.12 A block diagram of a wireless communication device according to an embodiment of the present disclosure is illustrated. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description disclosed by the accompanying drawings is intended to describe exemplary embodiments of the present disclosure, rather than to represent the only embodiment in which the present disclosure can be implemented. The following detailed description includes specific details to provide a complete understanding of the present disclosure. However, those skilled in the relevant art know that the present disclosure can be implemented without these specific details.

[0030] In some cases, well-known structures and devices may be omitted, or may be shown in the form of a block diagram based on the core functions of each structure and device in order to prevent ambiguity in the concepts of the present disclosure.

[0031] In the present disclosure, when an element is referred to as being "connected", "combined" or "linked" to another element, it may include an indirect connection relationship between another element and a direct connection relationship. In addition, in the present disclosure, the term "comprising" or "having" specifies the presence of the mentioned features, steps, operations, components and / or elements, but does not exclude the presence or addition of one or more other features, stages, operations, components, elements and / or groups thereof.

[0032] In the present invention, terms such as "first", "second", etc. are only used to distinguish one element from another element and are not used to limit the elements, and unless otherwise specified, they do not limit the order or importance between the elements, etc. Therefore, within the scope of the present disclosure, the first element in an embodiment may be referred to as the second element in another embodiment, and similarly, the second element in an embodiment may be referred to as the first element in another embodiment.

[0033] The terms used in this disclosure are intended to describe specific embodiments, rather than to limit the claims. As used in the description of the embodiments and the appended claims, the singular form is intended to include the plural form, unless the context clearly indicates otherwise. The term "and / or" used in this disclosure may refer to one of the related enumerated items, or mean that it refers to and includes any and all possible combinations of two or more of them. In addition, unless otherwise stated, the " / " between words in the present invention has the same meaning as "and / or".

[0034] The present disclosure describes a wireless communication network or a wireless communication system, and operations performed in the wireless communication network can be performed in a process in which a device (e.g., a base station) controlling the corresponding wireless communication network controls the network and sends or receives signals, or can be performed in a process in which a terminal associated with the corresponding wireless network sends or receives signals between the network or the terminal.

[0035] In the present disclosure, sending or receiving a channel includes the meaning of sending or receiving information or signals through the corresponding channel. For example, sending a control channel means sending control information or control signals through the control channel. Similarly, sending a data channel means sending data information or data signals through the data channel.

[0036] In the following, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In the downlink, the transmitter may be part of a base station, and the receiver may be part of a terminal. In the uplink, the transmitter may be part of a terminal, and the receiver may be part of a base station. The base station may be expressed as a first communication device, and the terminal may be expressed as a second communication device. The base station (BS) may be replaced by terms such as a fixed station, a node B, an eNB (evolved node B), a gNB (next generation node B), a BTS (base station transceiver system), an access point (AP), a network (5G network), an AI (artificial intelligence) system / module, an RSU (roadside unit), a robot, a drone (UAV: unmanned aerial vehicle), an AR (augmented reality) device, a VR (virtual reality) device, and the like. In addition, the terminal can be fixed or mobile, and can be replaced by terms such as UE (user equipment), MS (mobile station), UT (user terminal), MSS (mobile subscriber station), SS (subscriber station), AMS (advanced mobile station), WT (wireless terminal), MTC (machine type communication) device, M2M (machine to machine) device, D2D (device to device) device, vehicle, RSU (roadside unit), robot, AI (artificial intelligence) module, drone (UAV: unmanned aerial vehicle), AR (augmented reality) device, VR (virtual reality) device, etc.

[0037] The following description can be used for various radio access systems, such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA can be implemented by UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented by radio technologies such as GSM (Global System for Mobile Communications) / GPRS (General Packet Radio Service) / EDGE (Data Rate Enhanced GSM Evolution). OFDMA can be implemented by radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) using E-UTRA, and LTE-A (Advanced) / LTE-A pro is an advanced version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an advanced version of 3GPP LTE / LTE-A / LTE-A pro.

[0038] In order to make the description clearer, the description is based on the 3GPP communication system (e.g., LTE-A, NR), but the technical idea of ​​the present disclosure is not limited to this. LTE means the technology after 3GPP TS (Technical Specification) 36.xxx version 8. Specifically, the LTE technology in or after 3GPP TS 36.xxx version is called LTE-A, and the LTE technology in or after 3GPP TS 36.xxx version 13 is called LTE-A pro. 3GPP NR means the technology in or after TS 38.xxx version. LTE / NR can be referred to as a 3GPP system. "xxx" means the detailed number of the standard document. LTE / NR can generally be referred to as a 3GPP system. For the background technology, terms, abbreviations, etc. used to describe the present disclosure, reference can be made to the matters described in the standard documents disclosed before the present disclosure. For example, reference can be made to the following documents.

[0039] For 3GPP LTE, reference may be made to TS 36.211 (Physical Channels and Modulation), TS 36.212 (Multiplexing and Channel Coding), TS 36.213 (Physical Layer Procedures), TS 36.300 (Overall Description), and TS 36.331 (Radio Resource Control).

[0040] For 3GPP NR, you can refer to TS 38.211 (Physical channels and modulation), TS 38.212 (Multiplexing and channel coding), TS 38.213 (Physical layer procedures for control), TS 38.214 (Physical layer procedures for data), TS 38.300 (NR and NG-RAN (Next Generation Radio Access Network) overall description), and TS 38.331 (Radio Resource Control Protocol Specification).

[0041] Abbreviations of terms that may be used in the present disclosure are defined as follows.

[0042] -BM: Beam Management

[0043] -CQI: Channel Quality Indicator

[0044] -CRI: Channel State Information-Reference Signal Resource Indicator

[0045] -CSI: Channel State Information

[0046] -CSI-IM: Channel State Information-Interference Measurement

[0047] -CSI-RS: Channel State Information-Reference Signal

[0048] -DMRS: Demodulation Reference Signal

[0049] -FDM: Frequency Division Multiplexing

[0050] -FFT: Fast Fourier Transform

[0051] -IFDMA: Interleaved Frequency Division Multiple Access

[0052] -IFFT: Inverse Fast Fourier Transform

[0053] -L1-RSRP: Layer 1 reference signal received power

[0054] -L1-RSRQ: Layer 1 reference signal reception quality

[0055] -MAC: Media Access Control

[0056] -NZP: Non-Zero Power

[0057] -OFDM: Orthogonal Frequency Division Multiplexing

[0058] -PDCCH: Physical Downlink Control Channel

[0059] -PDSCH: Physical Downlink Shared Channel

[0060] -PMI: Precoding matrix indicator

[0061] -RE: Resource Element

[0062] -RI: Rank indicator

[0063] -RRC: Radio Resource Control

[0064] -RSSI: Received Signal Strength Indicator

[0065] -Rx: Receive

[0066] -QCL: Quasi-Co-located

[0067] -SINR: Signal to Interference and Noise Ratio

[0068] -SSB (or SS / PBCH block): synchronization signal block (including PSS (primary synchronization signal), SSS (secondary synchronization signal) and PBCH (physical broadcast channel))

[0069] -TDM: Time Division Multiplexing

[0070] -TRP: Transmit and Receive Point

[0071] -TRS: Tracking Reference Signal

[0072] -Tx: Send

[0073] -UE: User Equipment

[0074] -ZP: Zero Power

[0075] Overall system

[0076] As more communication devices require higher capacity, there has been a demand for improved mobile broadband communications compared to existing radio access technologies (RATs). In addition, large-scale MTC (machine type communication) that provides various services anytime and anywhere by connecting multiple devices and things is also one of the main issues to be considered in the next generation of communications. In addition, the design of communication systems considering services / terminals that are sensitive to reliability and latency is also discussed. Therefore, the introduction of next-generation RATs considering eMBB (enhanced mobile broadband communication), mMTC (massive MTC), URLLC (ultra-reliable low-latency communication), etc. is discussed, and for convenience, the corresponding technology is referred to as NR in this disclosure. NR is an expression representing an example of 5G RAT.

[0077] The new RAT system including NR uses an OFDM transmission method or a transmission method similar thereto. The new RAT system may follow OFDM parameters different from those of LTE. Alternatively, the new RAT system follows the parameters of the existing LTE / LTE-A as is, but may support a wider system bandwidth (e.g., 100 MHz). Alternatively, a cell may support multiple parameter sets. In other words, terminals operating according to different parameter sets may coexist in one cell.

[0078] A parameter set corresponds to one subcarrier spacing in the frequency domain. As the reference subcarrier spacing is scaled by an integer N, different parameter sets can be defined.

[0079] Figure 1 The structure of a wireless communication system to which the present disclosure can be applied is illustrated.

[0080] Reference Figure 1 , NG-RAN is configured with gNBs that provide the control plane (RRC) protocol side for the NG-RA (NG Radio Access) user plane (i.e., the new AS (Access Stratum) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and the UE. The gNBs are interconnected through the Xn interface. In addition, the gNBs are connected to the NGC (Next Generation Core) through the NG interface. More specifically, the gNB is connected to the AMF (Access and Mobility Management Power) through the N2 interface, and to the UPF (User Plane Function) through the N3 interface.

[0081] Figure 2 The frame structure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0082] The NR system may support multiple parameter sets. Here, the parameter set may be defined by subcarrier spacing and cyclic prefix (CP) overhead. Here, multiple subcarrier spacings may be derived by scaling the basic (reference) subcarrier spacing by an integer N (or, μ). In addition, although it is assumed that very low subcarrier spacings are not used in very high carrier frequencies, the parameter set used may be selected independently of the frequency band. In addition, various frame structures according to multiple parameter sets may be supported in the NR system.

[0083] In the following, OFDM parameter sets and frame structures that can be considered in the NR system are described. Multiple OFDM parameter sets supported in the NR system can be defined as shown in Table 1 below.

[0084] [Table 1]

[0085] μ <![CDATA[Δf=2 μ ·15[kHz]]]> CP 0 15 normal 1 30 normal 2 60 Normal, Extended 3 120 normal 4 240 normal

[0086] NR supports multiple parameter sets (or subcarrier spacing (SCS)) for supporting various 5G services. For example, when the SCS is 15kHz, it supports wide areas of traditional cellular bands; and when the SCS is 30kHz / 60kHz, it supports dense cities, lower latency and wider carrier bandwidth; and when the SCS is 60kHz or higher, it supports bandwidths exceeding 24.25GHz to overcome phase noise.

[0087] The NR band is defined as two types of frequency ranges (FR1, FR2). FR1, FR2 can be configured as shown in Table 2 below. In addition, FR2 may mean millimeter wave (mmW).

[0088] [Table 2]

[0089] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz–7125MHz 15,30,60kHz FR2 24250MHz–52600MHz 60,120,240kHz

[0090] Regarding the frame structure in the NR system, the sizes of various fields in the time domain are expressed as T c =1 / (Δf max ·N f ) is a multiple of the time unit. Here, Δf max is 480·10 3Hz, and N f is 4096. Downlink and uplink transmissions are configured (organized) to have duration T f =1 / Δf max N f / 100)·T c =10ms radio frame. Here, the radio frame is configured with 10 subframes, each of which has T sf =(Δf max N f / 1000)·T c=1 ms duration. In this case, there may be one frame set for the uplink and one frame set for the downlink. Furthermore, the transmission in the i-th uplink frame from the terminal should start T earlier than the corresponding downlink frame in the corresponding terminal. TA =(N TA +N TA,offset )T c For subcarrier spacing configuration μ, the time slots are arranged in n subframes. s μ ∈{0,...,N slot subframe,μ -1} and in the radio frame the number is incremented by n s,f μ ∈{0,...,N slot frame,μ -1}. A time slot is configured with N symb slot consecutive OFDM symbols, and N symb slot Determined according to CP. Time slot n in a subframe s μ The beginning of the OFDM symbol n in the same subframe s μ N symb slot All terminals may not perform transmission and reception at the same time, which means that all OFDM symbols of a downlink time slot or an uplink time slot may not be used.

[0091] Table 3 shows the number of OFDM symbols per time slot in a normal CP (N symb slot ), the number of time slots per radio frame (N slot frame,μ ) and the number of time slots per subframe (N slot subframe,μ ), and Table 4 represents the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.

[0092] [Table 3]

[0093] μ <![CDATA[N symb slot ]]> <![CDATA[N slot frame,μ ]]> <![CDATA[N slot subframe,μ ]]> 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0094] [Table 4]

[0095] μ <![CDATA[N symb slot ]]> <![CDATA[N slot frame,μ ]]> <![CDATA[N slot subframe,μ ]]> 2 12 40 4

[0096] Figure 2 is an example of μ=2 (SCS is 60kHz), see Table 3, 1 subframe can include 4 time slots. Figure 21 subframe={1,2,4} shown in is an example, and the number of slots that may be included in 1 subframe is as defined in Table 3 or Table 4. In addition, a mini-slot may include 2, 4, or 7 symbols or more or less symbols.

[0097] Regarding the physical resources in the NR system, antenna ports, resource grids, resource elements, resource blocks, carrier parts, etc. can be considered. Hereinafter, the physical resources that can be considered in the NR system will be described in detail.

[0098] First, with respect to antenna ports, the antenna ports are defined so that the channel carrying the symbol in the antenna port can be inferred from the channel carrying the other symbol in the same antenna port. When the large-scale properties of the channel on which the symbol in one antenna port is carried can be inferred from the channel carrying the symbol of another antenna port, it can be said that the two antenna ports are in a QC / QCL (quasi-co-located or quasi-co-located) relationship. In this case, the large-scale properties include at least one of delay spread, Doppler spread, frequency shift, average received power, and receive timing.

[0099] Figure 3 A resource grid in a wireless communication system to which the present disclosure can be applied is illustrated.

[0100] refer to Figure 3 , exemplarily describing a resource grid configuration with N in the frequency domain RB μ N sc RB subcarriers, and one subframe is configured with 14·2 μ OFDM symbols, but not limited to this. In the NR system, the transmitted signal consists of 2 μ N symb (μ) OFDM symbols and N RB μ N sc RB Here, N RB μ ≤N RB max,μ . N RB max,μ represents the maximum transmission bandwidth, which may differ between uplink and downlink and between parameter sets. In this case, one resource grid can be configured for each μ and antenna port p. Each element of the resource grid for μ and antenna port p is called a resource element and is uniquely identified by an index pair (k, l'). Here, k = 0, ..., N RB μ N sc RB-1 is the index in the frequency domain, and l'=0,...,2 μ N symb (μ) -1 refers to the symbol position in the subframe. When referencing a resource element in a slot, an index pair (k, l) is used. Here, l = 0, ..., N symb μ -1. The resource element (k, l') for μ and antenna port p corresponds to the complex value a k,l' (p,μ) When there is no risk of aliasing or when no specific antenna port or parameter set is specified, the indices p and μ may be dropped and the complex value may be ak,l'(p) or ak,l'. In addition, a resource block (RB) is defined as N in the frequency domain. sc RB =12 consecutive subcarriers.

[0101] Point A serves as a common reference point for the resource block grid and is obtained as follows.

[0102] -OffsetToPointA for the primary cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping with the SS / PBCH block, which is used by the terminal for initial cell selection. Assuming a subcarrier spacing of 15kHz is used for FR1 and a subcarrier spacing of 60kHz is used for FR2, it is expressed in resource blocks.

[0103] -absoluteFrequencyPointA represents the frequency position of point A, expressed in ARFCN (Absolute Radio Frequency Channel Number).

[0104] For subcarrier spacing configuration μ, the common resource blocks are numbered from 0 upwards in the frequency domain. The center of subcarrier 0 of common resource block 0 for subcarrier spacing configuration μ is the same as "point A". Common resource block number n for subcarrier spacing configuration μ in the frequency domain CRB μ The relationship between and resource elements (k, l) is given as in Equation 1 below.

[0105] [Formula 1]

[0106]

[0107] In Equation 1, k is defined relative to point A, so that k=0 corresponds to a subcarrier centered at point A. Physical resource blocks are spaced from 0 to N in a bandwidth part (BWP). BWP,i size,μ -1 numbering and i is the number of the BWP. Physical resource block n in BWP i PRB and public resource block n CRBThe relationship between is given by the following equation 2.

[0108] [Formula 2]

[0109]

[0110] is the common resource block where the BWP starts relative to common resource block 0.

[0111] Figure 4 The physical resource blocks in the wireless communication system to which the present disclosure can be applied are illustrated. Figure 5 The time slot structure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0112] Reference Figure 4 and Figure 5 , a slot includes a plurality of symbols in the time domain. For example, for a normal CP, 1 slot includes 7 symbols, but for an extended CP, 1 slot includes 6 symbols.

[0113] A carrier includes multiple subcarriers in the frequency domain. An RB (resource block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (bandwidth part) is defined as multiple consecutive (physical) resource blocks in the frequency domain and may correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed through an activated BWP, and only one BWP may be activated for a terminal. In a resource grid, each element is called a resource element (RE) and may map a complex symbol.

[0114] In the NR system, each component carrier (CC) can support up to 400MHz. If a terminal operating in such a wideband CC always operates to turn on the radio frequency (FR) chip for the entire CC, the terminal battery consumption may increase. Alternatively, when considering multiple application scenarios operating in a wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different parameter sets (e.g., subcarrier spacing, etc.) can be supported in each frequency band in the corresponding CC. Alternatively, each terminal may have different capabilities for the maximum bandwidth. Taking this into account, the base station can instruct the terminal to operate only in part of the bandwidth instead of the full bandwidth of the wideband CC, and for convenience, the corresponding partial bandwidth is defined as a bandwidth part (BWP). BWP can be configured with continuous RBs on the frequency axis and can correspond to a parameter set (e.g., subcarrier spacing, CP length, slot / microslot duration).

[0115] At the same time, even in one CC configured to the terminal, the base station can configure multiple BWPs. For example, a BWP occupying a relatively small frequency domain can be configured in the PDCCH monitoring time slot, and the PDSCH indicated by the PDCCH can be scheduled in a larger BWP. Alternatively, when the UE is congested in a specific BWP, other BWPs can be configured for some terminals for load balancing. Alternatively, considering the frequency domain inter-cell interference elimination between adjacent cells, etc., some full-bandwidth intermediate spectrums can be excluded, and BWPs on two edges can be configured in the same time slot. In other words, the base station can configure at least one DL / UL BWP to a terminal associated with a broadband CC. The base station can activate at least one DL / UL BWP in the configured DL / UL BWP at a specific time (through L1 signaling or MAC CE (control element) or RRC signaling, etc.). In addition, the base station can indicate switching to other configured DL / UL BWPs (through L1 signaling or MAC CE or RRC signaling, etc.). Alternatively, based on a timer, when the timer value expires, it can switch to a determined DL / UL BWP. Here, the activated DL / UL BWP is defined as the active DL / UL BWP. However, when the terminal performs the initial access procedure or sets up the RRC connection, the configuration on the DL / UL BWP may not be received, so the DL / UL BWP assumed by the terminal in these cases is defined as the initial active DL / UL BWP.

[0116] Figure 6 Physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the physical channels are illustrated.

[0117] In a wireless communication system, a terminal receives information from a base station through a downlink and transmits information to the base station through an uplink. The information sent and received by the base station and the terminal includes data and various control information, and there are various physical channels according to the type / purpose of the information they send and receive.

[0118] When the terminal is turned on or newly enters a cell, it performs an initial cell search including synchronization with a base station (S601). For the initial cell search, the terminal can synchronize with the base station by receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station, and obtain information such as a cell identifier (ID). Then, the terminal can obtain broadcast information in the cell by receiving a physical broadcast channel (PBCH) from the base station. At the same time, the terminal can check the downlink channel status by receiving a downlink reference signal (DL RS) in the initial cell search phase.

[0119] The terminal that has completed the initial cell search may obtain more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to information carried in the PDCCH (S602).

[0120] At the same time, when the terminal accesses the base station for the first time or there are no radio resources for signal transmission, it can perform a random access (RACH) process (S603 to S606) on the base station. For the random access process, the terminal can send a specific sequence as a preamble code through a physical random access channel (PRACH) (S603 and S605), and can receive a response message to the preamble code through a PDCCH and a corresponding PDSCH (S604 and S606). The contention-based RACH can additionally perform a contention resolution process.

[0121] The terminal that subsequently performs the above process may perform PDCCH / PDSCH reception (S607) and PUSCH (Physical Uplink Shared Channel) / PUCCH (Physical Uplink Control Channel) transmission (S608) as a general uplink / downlink signal transmission process. Specifically, the terminal receives downlink control information (DCI) via PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and the format varies according to its purpose of use.

[0122] At the same time, the control information sent by the terminal to the base station through the uplink or received by the terminal from the base station includes downlink / uplink ACK / NACK (acknowledgement / non-acknowledgement) signal, CQI (channel instruction indicator), PMI (precoding matrix indicator), RI (rank indicator), etc. For the 3GPP LTE system, the terminal can send the above-mentioned CQI / PMI / RI and other control information through PUSCH and / or PUCCH.

[0123] Table 5 shows an example of the DCI format in the NR system.

[0124] [Table 5]

[0125]

[0126] Referring to Table 5, DCI formats 0_0, 0_1 and 0_2 may include resource information (e.g., UL / SUL (supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), information related to transport blocks (TBs) (e.g., MCS (modulation coding and scheme), NDI (new data indicator), RV (redundancy version)), etc.), information related to HARQ (hybrid-automatic repeat and request) (e.g., process number, DAI (downlink assignment index), PDSCH-HARQ feedback timing, etc.), information related to multiple antennas (e.g., DMRS sequence initialization information, antenna port, CSI request, etc.), power control information related to PUSCH scheduling (e.g., PUSCH power control, etc.), and the control information included in each DCI format may be predefined.

[0127] DCI format 0_0 is used to schedule PUSCH in one cell. Information included in DCI format 0_0 is CRC (Cyclic Redundancy Check) scrambled by C-RNTI (Cell Radio Network Temporary Identifier) ​​or CS-RNTI (Configured Scheduling RNTI) or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI) and transmitted.

[0128] DCI format 0_1 ​​is used to indicate the scheduling of one or more PUSCHs or to configure grant (CG) downlink feedback information to a terminal in a cell. The information included in DCI format 0_1 ​​is scrambled and transmitted by C-RNTI or CS-RNTI or SP-CSI-RNTI (semi-persistent CSIRNTI) or MCS-C-RNTI.

[0129] DCI format 0_2 is used to schedule PUSCH in one cell. Information included in DCI format 0_2 is scrambled and transmitted by C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

[0130] Next, DCI formats 1_0, 1_1 and 1_2 may include resource information (e.g., frequency resource allocation, time resource allocation, VRB (virtual resource block) -PRB (physical resource block) mapping, etc.), information related to transport blocks (TBs) (e.g., MCS, NDI, RV, etc.), information related to HARQ (e.g., process number, DAI, PDSCH-HARQ feedback timing, etc.), information related to multiple antennas (e.g., antenna ports, TCI (transmission configuration indicator), SRS (sounding reference signal) request, etc.), information related to PUCCH scheduling regarding PDSCH (e.g., PUCCH power control, PUCCH resource indicator, etc.), and the control information included in each DCI format may be predefined.

[0131] DCI format 1_0 is used to schedule PDSCH in one DL cell. Information included in DCI format 1_0 is CRC scrambled and transmitted by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0132] DCI format 1_1 is used to schedule PDSCH in one cell. Information included in DCI format 1_1 is CRC scrambled and transmitted by C-RNTI or CS-RNTI or MCS-C-RNTI.

[0133] DCI format 1_2 is used to schedule PDSCH in one cell. Information included in DCI format 1_2 is CRC scrambled and transmitted by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0134] Random access operation and related operations

[0135] When there is no PUSCH transmission resource (i.e., uplink grant) allocated by the base station, the terminal can perform a random access operation. Random access to the NR system can be initiated in the following situations: 1) when the terminal requests or resumes an RRC connection, 2) when the terminal performs a handover with respect to a neighboring cell or a secondary cell group (SCG) addition (i.e., SCG addition), 3) when a scheduling request is sent to the base station, 4) when the base station instructs the terminal to perform random access with a PDCCH command, 5) when a beam failure or RRC connection failure is detected.

[0136] Figure 7 The random access procedure in a wireless communication system to which the present disclosure can be applied is illustrated. Figure 7 (a) of FIG. 1 illustrates a contention-based random access procedure, and Figure 7 (b) illustrates a dedicated random access procedure.

[0137] Reference Figure 7 (a) The contention-based random access procedure includes the following four steps. Hereinafter, the messages sent in steps 1 to 4 may be referred to as messages (Msg) 1 to Msg 4, respectively.

[0138] -Step 1: The terminal sends a random access channel (RACH) preamble through a physical random access channel (PRACH).

[0139] - Step 2: The terminal receives a random access response (RAR) from the base station through a downlink shared channel (DL-SCH).

[0140] -Step 3: The terminal sends a layer 2 / layer 3 message to the base station through an uplink shared channel (UL-SCH).

[0141] - Step 4: The terminal receives a contention resolution message from the base station via the DL-SCH.

[0142] The terminal may receive information about random access from the base station through system information.

[0143] If random access is required, the terminal transmits a RACH preamble to the base station as in step 1. The base station can distinguish each random access preamble by the time / frequency resource (ie, RACH opportunity (RO)) at which the random access preamble is transmitted and a random access preamble index (PI).

[0144] When the base station receives the random access preamble from the terminal, the base station sends a random access response (RAR) message to the terminal as in step 2. In order to receive the random access response message, within a preconfigured time window (e.g., ra-ResponseWindow), the terminal monitors the CRC masked L1 / L2 control channel (PDCCH) using RA-RNTI (Random Access-RNTI), which includes scheduling information for the random access response message. The PDCCH masked with RA-RNTI can be sent only through the common search space. When receiving a scheduling signal masked by RA-RNTI, the terminal can receive a random access response message from the PDSCH indicated by the scheduling information. Thereafter, the terminal checks whether there is random access response information indicated to itself in the random access response message. Whether the random access response information indicated to itself exists can be checked by whether the random access preamble ID (RAPID) of the preamble sent by the terminal exists. The index and RAPID of the preamble sent by the terminal can be the same. The random access response information includes the corresponding random access preamble code index, timing offset information for UL synchronization (e.g., timing advance command (TAC)), UL scheduling information for message 3 transmission (e.g., UL grant), and terminal temporary identification information (e.g., TC-RNTI (temporary C-RNTI)).

[0145] The terminal receiving the random access response information sends UL-SCH (shared channel) data (message 3) through PUSCH according to the UL scheduling information and the timing offset value, as in step 3. The time and frequency resources to which the PUSCH carrying message 3 is mapped / sent are defined as PO (PUSCH opportunity). Message 3 may include the ID of the terminal (or the global ID of the terminal). Alternatively, message 3 may include RRC connection request related information (e.g., RRCSetupRequest message) for initial access. In addition, message 3 may include a buffer status report (BSR) on the amount of data available for transmission by the terminal.

[0146] After receiving the UL-SCH data, as in step 4, the base station sends a contention resolution message (message 4) to the terminal. When the terminal receives the contention resolution message and successfully resolves the contention, the TC-RNTI is changed to the C-RNTI. Message 4 may include the ID of the terminal and / or RRC connection related information (e.g., RRCSetup message). If the information sent by message 3 and the information received by message 4 do not match, or if message 4 is not received within a specific duration, the terminal may retransmit message 3 due to contention resolution failure.

[0147] Reference Figure 7 (b), the dedicated random access procedure includes the following three steps. Hereinafter, the messages sent in step 0 to step 2 may be referred to as messages (Msg) 0 to Msg 2, respectively. The dedicated random access procedure may be triggered using a PDCCH (hereinafter referred to as a PDCCH command) instructing the base station to send a RACH preamble.

[0148] -Step 0: The base station allocates a RACH preamble code to the terminal through dedicated signaling.

[0149] -Step 1: The terminal sends a RACH preamble via PRACH.

[0150] - Step 2: The terminal receives a random access response (RAR) from the base station through the DL-SCH.

[0151] The operations of step 1 and step 2 of the dedicated random access procedure may be the same as steps 1 and step 2 of the contention-based random access procedure.

[0152] In NR, DCI format 1_0 is used to initiate a non-contention-based random access procedure with a PDCCH command. DCI format 1_0 is used to schedule PDSCH in one DL cell. In addition, when the CRC (cyclic redundancy check) of DCI format 1_0 is scrambled with C-RNTI and all bit values ​​of the "Frequency domain resource assignment" field are 1, DCI format 1_0 is used as a PDCCH command indicating a random access procedure. In this case, the fields of DCI format 1_0 are configured as follows.

[0153] -RA preamble index: 6 bits

[0154] -UL / SUL (Supplementary UL) indicator: 1 bit. When the bit values ​​of the RA preamble index are not all 0 and SUL is configured for the terminal in the cell, this indicates the UL carrier on which the PRACH is transmitted in the cell. Otherwise, it is reserved.

[0155] -SSB (Synchronization Signal / Physical Broadcast Channel) Index: 6 bits. When all bit values ​​of RA preamble index are not 0, it indicates the SSB used to determine the RACH timing of PRACH transmission. Otherwise, it is reserved.

[0156] -PRACH Mask Index: 4 bits. When all bit values ​​of RA Preamble Index are not 0, it indicates the RACH opportunity associated with the SSB indicated by SSB Index. Otherwise, it is reserved.

[0157] - Reserved: 10 bits

[0158] When DCI format 1_0 does not correspond to a PDCCH command, DCI format 1_0 includes fields for scheduling PDSCH (eg, TDRA (Time Domain Resource Assignment), MCS (Modulation and Coding Scheme), HARQ process number, PDSCH-to-HARQ_feedback timing indicator, etc.).

[0159] In the NR system, lower latency may be required than in the existing system. In addition, if a random access process occurs in the U band, the random access process is terminated, and the contention is resolved only when the terminal and the base station succeed sequentially in the LBT in the 4-step random access process. If LBT fails in even one step of the 4-step random access process, resource efficiency is reduced and latency is increased. Specifically, if LBT fails in the scheduling / transmission process associated with message 2 or message 3, significant reduction in resource efficiency and increase in latency may occur. Even in the random access process in the L band, a low-latency random access process may be required in various scenarios of the NR system. Therefore, a 2-step random access process can also be performed on the L band.

[0160] Figure 8 A two-step random access procedure in a wireless communication system to which the present disclosure can be applied is illustrated.

[0161] like Figure 8 As shown in (a), the 2-step random access process can be configured with the following two steps: uplink signal transmission from the terminal to the base station (called message A, corresponding to PRACH preamble code + Msg3 PUSCH); and downlink signal transmission from the base station to the terminal (called message B, and corresponding to RAR + Msg4 PDSCH).

[0162] In addition, in the non-contention random access process, the random access preamble and the PUSCH part can be sent together, such as Figure 8 as shown in (b).

[0163] although Figure 8Although not shown, a PDCCH for scheduling message B may be transmitted from the base station to the terminal, which may be referred to as Msg.BPDCCH.

[0164] Dynamic waveform switching method

[0165] The above contents (NR frame structure, NTN system, etc.) can be applied in combination with the method proposed in the present disclosure described later, or can be supplemented to clarify the technical features of the method proposed in the present disclosure.

[0166] In addition, the method to be described later is related to uplink transmission, which can be equivalently applied to the downlink signal transmission method in the above-mentioned NR system or LTE system. It can be modified or replaced to suit the terms, expressions, structures, etc. defined in each system so that the technical ideas proposed in this disclosure can be implemented in the corresponding system.

[0167] NR supports multiple parameter sets (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15kHz, it supports wide areas in traditional cellular bands. When the SCS is 30kHz / 60kHz, it supports dense cities, lower latency, and wider carrier bandwidth. When the SCS is 60kHz or greater, it supports bandwidths greater than 24.25GHz to overcome phase noise.

[0168] The NR band is defined by two types of frequency ranges (FR1, FR2). FR1 and FR2 can be configured as shown in Table 6 below. In addition, FR2 can represent millimeter wave (mmW).

[0169] [Table 6]

[0170] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0171] In addition, for UL coverage enhancement of NR systems, repeated transmission of RACH preambles (i.e., random access preambles) is being considered. Here, it is necessary to define how beam operation and / or power control operates when the UE repeatedly transmits the PRACH preamble. Therefore, in the present disclosure, a method for enabling / disabling dynamic waveform switching is proposed.

[0172] Implementation 1) Method for enabling / disabling dynamic waveform switching

[0173] Currently, in NR, it is defined that the base station configures / indicates which waveform to use among cyclic prefix OFDM (CP-OFDM) and discrete Fourier transform spread OFDM (DFT-S-OFDM) through RRC signaling (e.g., system information block 1 (SIB1), UE-specific RRC signaling, etc.).

[0174] DFT-S-OFDM can be generated by combining transform precoding and CP-OFDM. Transform precoding reduces the relatively high peak-to-average power (PAPR) associated with CP-OFDM. Hereinafter, in the present disclosure, configuring / indicating DFT-S-OFDM may be interpreted as configuring / indicating that transform precoding is enabled, and configuring / indicating CP-OFDM may be interpreted as configuring / indicating that transform precoding is disabled.

[0175] To explain in more detail what is defined in 3GPP TS 38.331, in the case of a 4-step RACH procedure (i.e., a random access procedure), if the higher layer parameter / field "msg3-transformPrecoder" is indicated as enabled in the RACH common configuration (RACH-ConfigCommon), DFT-S-OFDM is defined as being used as the UL waveform of the Msg.3PUSCH. On the other hand, if there is no higher layer parameter / field "msg3-transformPrecoder", CP-OFDM is defined as being used as the UL waveform of the Msg.3PUSCH. On the other hand, in the case of a 2-step RACH procedure, if the higher layer parameter / field "msgA-TransformPrecoder" is indicated as enabled in the Msg.A PUSCH configuration (MsgA-PUSCH-Config), DFT-S-OFDM is defined as being used as the waveform of the Msg.A PUSCH. On the other hand, if the higher layer parameter / field "msgA-TransformPrecoder" is indicated as disabled, CP-OFDM is defined to be used as the waveform for Msg.A PUSCH.

[0176] Finally, if the high-level parameter / field "transformPrecoder" is indicated as enabled in the PUSCH configuration (PUSCH-Config) or the configured grant configuration (ConfiguredGrantConfig) as a waveform of other UL channels other than Msg.3PUSCH and Msg.A PUSCH (e.g., PUSCH other than normal PUSCH (i.e., configured grant (CG) PUSCH, configured PUSCH, etc.), it is defined to use DFT-S-OFDM, and if the high-level parameter / field "transformPrecoder" is indicated as disabled, it is defined to use CP-OFDM. In addition, if the "transformPrecoder" parameter / field is not separately indicated, it is defined to follow the setting of "msg3-transformPrecoder".

[0177] According to one embodiment of the present disclosure, a new parameter indicating whether a dynamic switching function / operation between two UL waveforms (ie, CP-OFDM and DFT-S-OFDM) is supported may be introduced.

[0178] When a dynamic switching function is introduced between two UL waveforms (i.e., CP-OFDM and DFT-S-OFDM), the UE needs to know in advance whether the corresponding base station supports dynamic switching operations. Therefore, for example, it is possible to consider introducing new parameters / information / signaling for the base station to notify the UE whether dynamic waveform switching is enabled / disabled. Alternatively, it is possible to consider adding the new configuration value to the value that can be configured by the parameter indicating the waveform (e.g., "transformPrecoder", "msgA-TransformPrecoder", "msg3-transformPrecoder"). Here, whether the dynamic switching operation is supported can be configured / indicated to the UE by the base station through RRC signaling (e.g., SIB1, cell-specific RRC signaling, etc.).

[0179] Specifically, for example, the parameter "transformPrecoder", "msg3-transformPrecoder" or "msgA-TransformPrecoder" indicating the waveform can be kept as is, and a new parameter (e.g., Dynamic-waveform-switching) can be introduced. And, using the new parameter, the base station can configure / instruct the UE to enable or disable dynamic waveform switching. That is, the base station can configure / indicate enabling or disabling using the Dynamic-waveform-switching value. Alternatively, enabling can be configured / indicated only using the Dynamic-waveform-switching value, and disabling can be configured / indicated by making the Dynamic-waveform-switching parameter blank (i.e., non-existent). Here, dynamic waveform switching can also be configured separately for each UL channel / signal (e.g., PUSCH, Msg.3PUSCH, Msg.A PUSCH, etc.). If a new parameter (e.g., Dynamic-waveform-switching) is enabled, the UE may be configured to interpret the signal / channel assuming the presence of an additional field / information indicating dynamic waveform switching for a specific signal / channel (e.g., a DCI field transmitted via a PDCCH or a MAC-control element (CE) field, etc.). In other words, when dynamic-waveform-switching is enabled, the UE may transmit a UL signal / channel having a waveform indicated by the DCI or MAC-CE (e.g., indicated by whether transform precoding is applied). In addition, if dynamic waveform switching is configured / indicated to be disabled by a new parameter (e.g., Dynamic-waveform-switching) or dynamic waveform switching is configured / indicated to be disabled by not indicating the new parameter, the UE may be defined to configure the UL waveform according to the configuration value of the parameter (e.g., "transformPrecoder" or "msg3-transformPrecoder" or "msgA-TransformPrecoder") that configures / indicates the UL waveform.

[0180] In addition, according to one embodiment of the present disclosure, when dynamic waveform switching is enabled, the default waveform may be determined according to the following method.

[0181] If dynamic waveform switching is enabled, the UE may be defined to determine the waveform configured / indicated as one of CP-OFDM and DTS-S-OFDM as a default waveform by a parameter indicating the waveform (e.g., "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder"). Here, if the base station allows dynamic waveform switching from transmission of Msg.3PUSCH and / or Msg.APUSCH, the UE may interpret the waveform configured by "msg3-transformPrecoder" or "msgA-TransformPrecoder" as the default waveform. In addition, if the base station does not allow dynamic waveform switching in Msg.3PUSCH and / or Msg.A PUSCH transmission, but allows dynamic waveform switching from normal / configured PUSCH, the UE may first interpret the waveform configured by "transformPrecoder" as the default waveform, and if "transformPrecoder" is not indicated, the UE may interpret the waveform configured by "msg3-transformPrecoder" as the default waveform.

[0182] Alternatively, even if a parameter configuring / indicating a UL waveform is indicated (e.g., "transformPrecoder" or "msg3-transformPrecoder" or "msgA-TransformPrecoder"), if dynamic waveform switching is enabled via a new parameter (e.g., Dynamic-waveform-switching), the UE may be configured / defined to ignore the configuration value of the parameter indicating the waveform. In this case, it may be defined that the waveform pre-agreed between the UE and the base station (i.e., specified in the standard specification) is configured as the default waveform.

[0183] In addition, according to one embodiment of the present disclosure, the priority between the higher layer parameters / fields configuring / indicating the UL waveform and the dynamic indication enabled according to the dynamic waveform switching may be configured or predetermined by the base station.

[0184] For example, even if a parameter configuring / indicating a UL waveform (e.g., "transformPrecoder" or "msg3-transformPrecoder" or "msgA-TransformPrecoder") is indicated as a specific value (e.g., enabled or disabled), if dynamic waveform switching is enabled by a new parameter (e.g., Dynamic-waveform-switching), the UE may follow the waveform dynamically configured / indicated by a specific signal / channel (e.g., DCI, MAC-CE, etc.) (i.e., ignoring the existing parameter). In other words, if dynamic waveform switching is enabled by a new parameter (e.g., Dynamic-waveform-switching), the waveform to be used by the UE may be determined according to the dynamic configuration of the specific signal / channel (e.g., DCI, MAC-CE, etc.).

[0185] In the above description, the proposed newly introduced parameters may be configured / indicated together with signaling / configuration (i.e., information element (IE)), in which the parameters indicating the waveform (e.g., "transformPrecoder" or "msg3-transformPrecoder" or "msgA-TransformPrecoder") are configured / indicated. That is, the proposed newly introduced parameters may be configured / indicated in RACH common configuration (RACH-ConfigCommon) or PUSCH configuration (PUSCH-Config) or configuration grant configuration (ConfiguredGrantConfig) or Msg.A PUSCH configuration (MsgA-PUSCH-Config).

[0186] In addition, according to one embodiment of the present disclosure, whether a dynamic switching function / operation between two UL waveforms (ie, CP-OFDM and DFT-S-OFDM) is supported may be additionally indicated / configured in the parameter indicating the waveform.

[0187] For example, it may be considered to add one or more values ​​indicated by a parameter indicating a waveform (e.g., "transformPrecoder" or "msg3-transformPrecoder" or "msgA-TransformPrecoder"). In other words, although the parameter indicating the current waveform indicates one of "enable" and "disable", in a cell (or BWP) supporting dynamic waveform switching, the parameter may be defined as indicating one of the following three items: i) "enable", ii) "disable", and iii) "dynamic" (or "dynamic switching"). In other words, the method may be configured / defined to be extended from indicating one of the existing two states to indicating one of the three states.

[0188] In addition, the proposed method may be configured to be applied to all parameters for setting the existing waveform, but may also be applied only to parameters in specific cases. For example, the proposed method may be configured / defined to indicate one of the three states only to the RRC parameters (e.g., "transformPrecoder") received after entering the connected mode (i.e., in the PUSCH configuration (PUSCH-config) for each BWP configuration), excluding the parameters used during initial access. In this case, the UE may be configured / defined to operate as follows.

[0189] First, if the base station configures the RRC parameter (e.g., "transformPrecoder") value in the PUSCH configuration (PUSCH-config) (which can be configured for each BWP) as 'dynamic' (or 'dynamic switching'), the UE can determine that dynamic waveform switching is enabled (in the corresponding BWP). Then, the UE can determine that the DCI to be transmitted thereafter will be transmitted together with the field configuration for dynamic waveform switching, and can be configured / defined to interpret the corresponding DCI. For example, a 1-bit indication field in the DCI (ie, indicating CP-OFDM or DFT-S-OFDM) can be defined.

[0190] Here, if there is a 1-bit indication field for waveform indication in DCI format 0_2 or in the case of DCI format 0_1, the waveform to be used for PUSCH transmission by the UE can be configured according to the value dynamically indicated by the base station. Specifically, if the RRC parameter (e.g., "transformPrecoder") value in the PUSCH configuration (PUSCH-config) (which can be set for each BWP) is set to 'dynamic' (or 'dynamic switching'), and the UE receives (or monitors) DCI format 0_1 ​​or receives (or monitors) DCI format 0_2 in which there is a 1-bit indication field for waveform indication, the UE can ignore the waveform configuration value configured / indicated in the parameter (e.g., "msg3-transformPrecoder" or "msgA-TransformPrecoder") for initial access (sent in the SIB, etc.), and use the waveform dynamically configured / indicated via DCI to send PUSCH.

[0191] On the other hand, if the RRC parameter (e.g., "transformPrecoder") value in the PUSCH configuration (PUSCH-config) (which can be set for each BWP) is set to 'dynamic' (or 'dynamic switching'), but the UE receives (or monitors) DCI format 0_0 or receives (or monitors) DCI format 0_2 in which there is no 1-bit indication field for waveform indication, it may be necessary to define which waveform the UE should use to send PUSCH. Therefore, in this case, the UE may be defined / configured to send PUSCH using a waveform configured / indicated by a parameter (e.g., "msg3-transformPrecoder" or "msgA-TransformPrecoder") for initial access (e.g., sent in the SIB, etc.)

[0192] In addition, according to one embodiment of the present disclosure, a method may be considered to extend the parameter indicating the waveform (e.g., "transformPrecoder" or "msg3-transformPrecoder" or "msgA-TransformPrecoder") to indicate a value of four (i.e., indicating one of four states). That is, if the previously proposed method is a method of defining a parameter to indicate one of i) "enable", ii) "disable", and iii) 'dynamic' (or 'dynamic switching'), the newly proposed method extended to four may be considered to define a parameter to indicate one of i) "enable", ii) "disable", iii) 'dynamic' (or 'dynamic switching') and enabled by default, and iv) 'dynamic' (or 'dynamic switching') and disabled by default. In this case, the UE may operate as follows.

[0193] First, similar to the previously proposed method, if the base station configures the RRC parameter (e.g., "transformPrecoder") value in the PUSCH configuration (PUSCH-config) (which can be configured for each BWP) as i) 'dynamic' (or 'dynamic switching') and enabled by default or ii) 'dynamic' (or 'dynamic switching') and disabled by default, the UE can determine that dynamic waveform switching is enabled (in the corresponding BWP). Then, the UE can be configured / defined to determine that the DCI to be sent thereafter will be sent together with the field configuration for dynamic waveform switching, and interpret the DCI. For example, a 1-bit indication field in the DCI (i.e., indicating one of CP-OFDM and DFT-S-OFDM) can be defined.

[0194] Here, if there is a 1-bit indication field for waveform indication in DCI format 0_2 or in the case of DCI format 0_1, the waveform to be used for PUSCH transmission by the UE can be configured according to the value dynamically indicated by the base station. Specifically, if the RRC parameter (e.g., "transformPrecoder") value in the PUSCH configuration (PUSCH-config) (which can be configured for each BWP) i) is set to 'dynamic' (or 'dynamic switching') and enabled by default, or ii) is set to 'dynamic' (or 'dynamic switching') and disabled by default, and the UE receives (or monitors) DCI format 0_1 ​​or receives (or monitors) DCI format 0_2 in which there is a 1-bit indication field for waveform indication, the UE can ignore the waveform configuration value configured / indicated in the parameter (e.g., "msg3-transformPrecoder" or "msgA-TransformPrecoder") for initial access (e.g., transmitted in the SIB, etc.), and transmit the PUSCH using the waveform dynamically configured / indicated via the DCI.

[0195] On the other hand, if the UE receives (or monitors) DCI format 0_0 or receives (or monitors) DCI format 0_2 in which there is no 1-bit indication field for waveform indication, the UE may ignore the waveform configuration value configured / indicated by the parameter (e.g., "msg3-transformPrecoder" or "msgA-TransformPrecoder") for initial access (e.g., transmitted in the SIB, etc.), and may be defined / configured to use the waveform configured / indicated by the RRC parameter (e.g., "transformPrecoder") value in the PUSCH configuration (PUSCH-config) (which may be configured per BWP) to send PUSCH. That is, in this case, if the value of the corresponding parameter is i) 'dynamic' (or 'dynamic switching') and enabled by default, the UE may be configured to use DFT-s-OFDM to send PUSCH. In addition, if the value of the corresponding parameter is 'dynamic' (or 'dynamic switching') and disabled by default, the UE may be configured to use CP-OFDM to send PUSCH. The above proposed method has the advantage that it can be applied anywhere regardless of the primary cell (Pcell) or the secondary cell (Scell).

[0196] In addition, according to one embodiment of the present disclosure, the method of expanding the number of states indicated by the parameters for configuring the waveform as described above can also affect other parameters of the indication of the base station determined according to the value of the parameter. For example, parameters including operations / expressions such as "UE applied to PUSCH with transform precoding" or operations / expressions such as "UE applied to PUSCH without transform precoding" may be affected (for example, MCS table transform precoding (mcs-TableTransformPrecoder) in Table 7 below, MCS table transform precoding DCI 0_2 (mcs-TableTransformPrecoderDCI-0-2) in Table 8 below, MCS table transform precoding (mcs-TableTransformPrecoder) in Table 8 below, MCS table (mcs-Table) in Table 8, etc.). As another example, parameters including expressions such as "without transform precoder (including CP-OFDM)" or operations / expressions such as "with transform precoding (DFT-S-OFDM)" may also be affected (for example, transformPrecoderDisabled, transformPrecoderEnable, etc. in Table 9 below). As another example, parameters including expressions such as "when transform precoder parameters are disabled" or "if transform precoder is disabled" may also be affected (e.g., resource block group size (rbg-Size) in Table 10 below, DMRS sequence initialization (dmr-SeqInitialization) in Table 11 below).

[0197] [Table 7]

[0198]

[0199] [Table 8]

[0200]

[0201] [Table 9]

[0202]

[0203] [Table 10]

[0204]

[0205]

[0206] [Table 11]

[0207]

[0208] If the parameters for configuring the waveform as described above are extended to 3 or 4 states, the following sentences may be additionally included in the actions / expressions related to the transform precoder in the above parameters. For example, if a method of configuring to one of the 3 states is considered, "or if the transformPrecoder is dynamic (or dynamically switched)" may be added after a specific operation / sentence (e.g., "if the transformPrecoder is disabled" or "when the transformPrecoder parameter is disabled"). Alternatively, "if the transformPrecoder is dynamic (or dynamically switched), the network configures the field" may be added. As another example, if a method of configuring it to one of the 4 states is considered, "or if the transformPrecoder is dynamic (or dynamically switched) and disabled (or enabled) by default" may be added after a specific operation / sentence (e.g., "if the transformPrecoder is disabled" or "when the transformPrecoder parameter is disabled"). Alternatively, "if the transformPrecoder is dynamic (or dynamically switched) and disabled (or enabled) by default, the network configures the field" may be added.

[0209] Implementation 2) Method for configuring enable / disable of dynamic waveform switching

[0210] A method of allowing dynamic waveform switching before the UE enters the RRC connected state / mode may be considered. That is, a new parameter indicating whether dynamic waveform switching is allowed may be sent through RACH configuration (e.g., RACH-ConfigCommon, RACH-ConfigDedicated, etc.) as in the previously proposed method. In this case, if the parameter indicates enable, the UE may determine that dynamic waveform switching is allowed before entering the RRC connected state. Therefore, even if the base station configures / indicates that the waveform of Msg.3PUSCH or Msg.A PUSCH will be used in common by all UEs in the cell by sending the "msg3-transformPrecoder" or "msgA-TransformPrecoder" parameter of the high-layer signaling (e.g., SIB, etc.) to which the RACH configuration is sent, the waveform for Msg.3PUSCH and / or Msg.A PUSCH may be dynamically configured / indicated to individual UEs (or UE groups or all UEs).

[0211] 1) In the first method, the waveform for Msg.3 PUSCH can be configured via a random access response (RAR) grant. For example, a reserved 1-bit field of RAR can be used to configure / indicate one of CP-OFDM and DFT-S-OFDM. Here, since multiple UEs using the same random access preamble identifier (RAPID) at the same physical random access channel (PRACH) opportunity (RO) can receive the same RAR, the waveform of a specific UE group can be dynamically configured / indicated when a RAR grant is used.

[0212] 2) Alternatively, the waveform for Msg.3 PUSCH can be configured via the PDCCH / DCI (i.e., DCI format 1_0 with CRC bits scrambled with RA-RNTI) that schedules the PDSCH carrying RAR. For example, a reserved 1-bit field can be used in the PDCCH (i.e., DCI) that schedules the PDSCH carrying RAR to be configured / indicated as CP-OFDM or DFT-S-OFDM. In this case, multiple UEs using the same RO can receive DCI scrambled with the corresponding RA-RNTI because they have the same RA-RNTI. Therefore, in this case, the waveform for a specific UE group can also be dynamically configured / indicated.

[0213] 3) Alternatively, the base station may dynamically configure / indicate the waveform for retransmission of Msg.3PUSCH and / or Msg.A PUSCH. That is, in the case where the UE sends an initial transmission for Msg.3PUSCH and / or Msg.A PUSCH using the UL waveform configured / indicated by higher layer signaling, the base station may not be able to accurately receive the initial transmission, and may configure / indicate the UE for retransmission of Msg.3PUSCH and / or Msg.A PUSCH (i.e., send DCI format 0_0 in which CRC bits are scrambled using TC-RNTI). In this case, the reserved 1-bit field of the corresponding DCI may be configured / indicated as one of CP-OFDM and DFT-S-OFDM.

[0214] In the above operation, the base station can dynamically change the waveform for Msg.3PUSCH of the UE that performs initial access based on the reception performance of the PRACH preamble from the UE (hereinafter referred to as a specific criterion). In addition, the base station can be configured / indicated so that the waveform switching of Msg.3PUSCH can be requested using a specific RACH resource (e.g., a specific RACH time slot, a specific RO index, a specific preamble index, etc.). In this case, the UE that wants to change the waveform of the Msg.3PUSCH configured by high-level signaling can use a specific RACH resource to send a PRACH preamble. In this case, the base station can receive the PRACH preamble sent to the corresponding RACH resource, and then use one of the proposed methods to dynamically configure / indicate the waveform of the Msg.3PUSCH. Alternatively, the (specific) number of preamble repetitions can be used to configure / instruct the UE to request dynamic waveform switching. That is, if the base station preconfigures / indicates a preamble for a (specific) number of preamble repetitions, and the UE selects the preamble and performs preamble repetition, the base station can determine that the UE that selects and sends the preamble is requesting dynamic waveform switching. Then, if the base station determines that it meets the above-mentioned specific criteria, the base station can dynamically configure / indicate the waveform of Msg.3 PUSCH by one of the above-mentioned methods.

[0215] In addition, a UE in an RRC idle / inactive state / mode may report to the base station that it has UE capabilities for dynamic waveform switching. If the UE has the capability for dynamic waveform switching, the base station may dynamically configure / indicate the UL waveform to the UE. Therefore, if the base station configures a specific RACH resource for the purpose of requesting waveform switching of Msg.3PUSCH, it may be configured / defined that only UEs with UE capabilities for dynamic waveform switching send PRACH preambles in the corresponding RACH resources. In other words, specific RACH resources may be specifically configured for UEs with UE capabilities for dynamic waveform switching, or may be restricted to be used only by the UE (i.e., when used by other UEs, error handling, etc.). In addition, it may be desirable for UEs that only have UE capabilities for dynamic waveform switching and want to change the waveform of the Msg.3PUSCH configured by high-layer signaling to send PRACH preambles on the corresponding RACH resources. That is, even if there is UE capability for dynamic waveform switching, a UE that determines that it does not necessarily need to change the waveform of the Msg.3 PUSCH configured through higher layer signaling may not send a PRACH preamble on the corresponding RACH resource and may freely select a RACH resource.

[0216] Implementation 3) Configuration method performed by UE / base station when dynamic waveform switching is allowed after UE enters RRC connected state / mode

[0217] In addition, dynamic waveform switching is not allowed before the UE enters the RRC connected state / mode, and dynamic waveform switching may be allowed after entering the RRC connected state / mode. As in the previously proposed method, if a new parameter indicating whether dynamic waveform switching is allowed is sent together with the RRC establishment (e.g., an RRC establishment message, etc.) and the parameter indicates enablement, the UE may determine that dynamic waveform switching is allowed after entering the RRC connected state. In this case, a UE in an RRC idle / inactive state / mode may be configured to use a UL waveform configured / indicated by high-layer signaling (e.g., SIB, etc.). In addition, if the UE has a UE capability to support dynamic waveform switching before entering the RRC connected state / mode, the UE may report it to the base station. The base station that receives the UE capability for dynamic waveform switching may configure / indicate whether the UE allows dynamic waveform switching.

[0218] 1) In the first method, indication for dynamic waveform switching may be allowed in both fallback DCI (e.g., DCI format 0_0, DCI format 1_0) and / or non-fallback DCI (e.g., DCI format 0_1, DCI format 0_2, DCI format 1_1, DCI format 1_2). That is, a 1-bit field in fallback DCI or non-fallback DCI may be used to dynamically configure / indicate a waveform to CP-OFDM or DFT-S-OFDM.

[0219] Here, for example, in the case of fallback DCI, since the DCI field may not be available, the waveform may be configured / defined to be determined based on a value indicated by a specific existing DCI field (or a combination of specific existing DCI fields). Alternatively, in the case of fallback DCI, the waveform most recently dynamically indicated by the non-fallback DCI may be configured to be used. If the time point at which the UE receives the fallback DCI is before the time point at which it receives the non-fallback DCI, the UE may be configured / defined to follow the UL waveform indicated by higher-layer signaling (e.g., SIB, UE-specific RRC signaling, etc.).

[0220] Alternatively, not only fallback DCI but also non-fallback DCI may be configured / defined such that a waveform is determined based on a value indicated via an existing DCI field (or via a combination of specific existing DCI fields).

[0221] 2) In addition, dynamic waveform switching may be allowed only in non-fallback DCI, not in fallback DCI. That is, in the case of fallback DCI, the UE may follow the UL waveform (without dynamic waveform switching) indicated by high-layer signaling (e.g., SIB, UE-specific RRC signaling, etc.). On the other hand, only in non-fallback DCI, one of CP-OFDM and DFT-S-OFDM may be dynamically configured / indicated to the UE using a 1-bit field. Therefore, the configuration / indication of dynamic waveform switching may be defined / configured differently depending on the DCI format. For example, fallback DCI (such as DCI format 0_0, DCI format 1_0) does not configure / indicate dynamic waveform switching, and the UE may follow the configuration of high-layer signaling (e.g., msg3-transformPrecoder). Additionally, non-fallback DCIs such as DCI format 0_1 ​​and DCI format 1_1 may configure / indicate dynamic waveform switching.

[0222] Alternatively, the waveform may be configured / defined to be determined based on a value indicated via an existing DCI field (or a combination of specific existing DCI fields) in a non-fallback DCI.

[0223] In addition, since DCI format 0_2 and DCI format 1_2 have configurable DCI fields, the explicit switching indicator field (i.e., the field for dynamic waveform switching indication) that can be introduced in DCI format 0_1 ​​and DCI format 1_1 cannot always be configured. Therefore, only when the explicit switching indicator field (i.e., the field for dynamic waveform switching indication) is configured in DCI format 0_2 and DCI format 1_2, the UE can determine the waveform according to the value of the field. In addition, if the field for dynamic waveform switching indication is not configured in DCI format 0_2 and DCI format 1_2, the method introduced in the fallback DCI of DCI format 0_0 and DCI format 1_0 can be configured / defined for use by the UE (i.e., the waveform set by high-layer signaling can be used).

[0224] In addition, if dynamic waveform switching is enabled according to the above embodiment, whether dynamic waveform switching is supported may vary according to the DCI type / format. For example, fallback DCI (e.g., DCI format 0_0, DCI format 1_0) does not support dynamic waveform switching, and the UE may follow the configuration value (i.e., waveform) of the high-level signaling (e.g., msg3-transformPrecoder). In addition, non-fallback DCI (e.g., DCI format 0_1, DCI format 0_2, DCI format 1_1, DCI format 1_2) supports dynamic waveform switching and the waveform may be indicated by DCI.

[0225] Alternatively, dynamic waveform switching may not be supported in non-scheduled DCI, and dynamic waveform switching may be supported in scheduled DCI. In this case, in the case of non-scheduled DCI, the UE may follow the configuration value (ie, waveform) of the higher layer signaling (eg, msg3-transformPrecoder).

[0226] In addition, when dynamically configuring / indicating a waveform using DCI, one of the following methods may be considered: When adding a 1-bit field, or when reinterpreting and indicating a specific 1-bit field among existing fields, the following method may be applied.

[0227] Alternative Solution (Alt) 1) Directly configure whether to enable or disable transform precoding: When this method is applied, the UE may be defined / configured to ignore the parameter value (e.g., msg3-transformPrecoder) indicated by the higher layer signaling from the base station and follow the value indicated by the corresponding DCI (or MAC CE) field. In other words, the DCI (or MAC CE) field value indicating the waveform may have a higher priority than the higher layer signaling.

[0228] Table 12 illustrates the configuration of the DCI field according to one embodiment of the present disclosure.

[0229] [Table 12]

[0230] DCI Field Value 0 (or 1) 1 (or 0) content Disable transform precoding Enable transform precoding

[0231] Alt 2) Method for configuring whether the transform precoding value is the same as or different from the value indicated by the higher layer signaling: This corresponds to the operation of determining the transform precoding method (i.e., waveform) according to the parameter value (e.g., msg3-transformPrecoder) indicated by the base station through the higher layer signaling. That is, if the same transform precoding is indicated as being used by dynamic signaling (DCI or MAC CE), the UE may understand / consider using the same transform precoding method (i.e., waveform) as the parameter value (e.g., msg3-transformPrecoder) indicated by the higher layer signaling. On the other hand, if different transform precoding is indicated as being used by dynamic signaling (DCI or MAC CE), the UE may understand / consider using the parameter value (e.g., msg3-transformPrecoder) indicated by the higher layer signaling and using a different transform precoding method (i.e., waveform).

[0232] Table 13 illustrates the configuration of the DCI field according to one embodiment of the present disclosure.

[0233] [Table 13]

[0234] DCI Field Value 0 (or 1) 1 (or 0) content Use the same transform precoding as upper layer signaling Use transform precoding different from upper layer signaling

[0235] Alt 3) A method for setting a transform precoding value based on a waveform that was sent / set immediately before: For a UE for which the base station does not indicate dynamic waveform switching, a parameter value (e.g., msg3-transformPrecoder) indicated by upper layer signaling corresponds to a reference transform precoding method (i.e., waveform), and for a UE for which the base station indicates dynamic waveform switching, a value that was set and sent immediately before by dynamic waveform switching may correspond to a reference transform precoding method (i.e., waveform). In this case, when a transform precoding (i.e., waveform) change instruction arrives through dynamic signaling (DCI or MAC CE), the transform precoding method (i.e., waveform) may be changed to a transform precoding method (i.e., waveform) that is different from the reference transform precoding method (i.e., waveform).

[0236] Table 14 illustrates the configuration of the DCI field according to one embodiment of the present disclosure.

[0237] [Table 14]

[0238]

[0239] The comparison between Alt 2 and Alt 3 among the above methods is as follows. In Alt 2, whenever a precoding scheme different from the transform precoding scheme (i.e., waveform) configured via high-level signaling is attempted / configured, it is necessary to configure / instruct the use of a different transform precoding. On the other hand, in Alt 3, a transform precoding scheme (i.e., waveform) different from high-level signaling is configured to be used only once, and thereafter, the use of the same transform precoding scheme (i.e., waveform) as the immediately preceding DG PUSCH is instructed. Therefore, a transform precoding scheme (i.e., waveform) different from high-level signaling can always be configured.

[0240] In the method proposed above, specific existing DCI fields that can be used for waveform indication and DCI fields that can correspond to their combinations can be used, for example, MCS field, new data indicator (NDI) field, redundant version (RV) field, time domain resource allocation (TDRA) field, frequency domain resource allocation (FDRA) field, etc.

[0241] In addition, dynamic waveform switching for PUSCH transmission may be allowed in a RACH procedure (e.g., contention-free random access (CFRA)) indicated by a PDCCH command. That is, similar to the previously proposed method, a method of configuring a waveform for PUSCH through a RAR grant may be considered. For example, a reserved 1-bit field of the RAR may be used to configure / indicate one of CP-OFDM and DFT-S-OFDM to the UE. Alternatively, a method of configuring / indicating a waveform for PUSCH by indicating a DCI format 1_0 of a PDCCH command (all bits of the CRC and FDRA fields scrambled by the C-RNTI are set to 1) may be considered. For example, a waveform may be configured / indicated as CP-OFDM or DFT-S-OFDM using a reserved field 1 bit of the DCI format 1_0 indicating a PDCCH command.

[0242] In addition, a method of implicitly switching the waveform to be used by the UE through BWP switching can be considered. That is, the method can specify the waveform to be used in each BWP through a specific parameter (e.g., RACH common configuration (RACH-ConfigCommon), PUSCH configuration (PUSCH-Config) or configured grant configuration (ConfiguredGrantConfig), etc.) within the BWP configuration (e.g., BWP uplink (BWP-Uplink), BWP common (BWP-common) or BWP dedicated (BWP-Dedicated), etc.) that transmits relevant parameters for each BWP configuration. In this case, the UE can perform PUSCH transmission using the waveform designated to the currently active BWP that was most recently indicated (i.e., most recently indicated). In this way, when waveform switching is implicitly introduced via BWP switching, if the base station does not configure a separate UL waveform in the BWP configuration (e.g., does not separately indicate the value of the "transformPrecoder" parameter that can be newly added to the BWP configuration), the UE can follow the UL waveform indicated by the higher layer signaling (e.g., SIB, UE-specific RRC signaling, etc.).

[0243] In addition, it can be considered that the base station uses the newly introduced parameters (e.g., Dynamic-waveform-switching) proposed above to configure / indicate whether BWP-specific (implicit) dynamic waveform switching is allowed through BWP switching. The UE can know whether the base station allows BWP-specific (implicit) dynamic waveform switching through the parameters, and if allowed, it can be configured to determine whether to switch the waveform to be used by the UE during BWP switching. If the base station does not allow BWP-specific (implicit) dynamic waveform switching, the UE can be configured to follow the existing NR operation.

[0244] In the above embodiments, “using a 1-bit field may be configured / indicated as one of CP-OFDM and DFT-S-OFDM” may mean, for example, “if a 1-bit field is used as the “transformPrecoder” field and the field indicates enable, the UE is configured to use DT-S-OFDM for uplink transmission, and if the field indicates disable, the UE is configured to use CP-OFDM for uplink transmission”.

[0245] In addition, although the above embodiment proposes a method of specifying / indicating a waveform of CP-OFDM or DTC-S-OFDM using a 1-bit field, the proposed method can be used in a different manner (for example, by utilizing a specific 1-bit field or a configuration value based on a specific DCI field) to indicate a change to a waveform different from the most recently configured / indicated waveform (including a dynamically indicated waveform). That is, if the most recently configured / indicated waveform (including a dynamically indicated waveform) is CP-OFDM (or DFT-S-OFDM), the method of indicating a change to DFT-S-OFDM (or CP-OFDM) by the above method can be used.

[0246] Alternatively, a waveform change from that configured / indicated by the most recent higher layer signaling (e.g., SIB, UE-specific RRC signaling) may be indicated. That is, if CP-OFDM (or DFT-S-OFDM) is indicated via higher layer signaling, the dynamic waveform switching method may be configured to be used only when the base station intends to indicate the UE to DFT-S-OFDM (or CP-OFDM).

[0247] The proposed method may be configured / applied to other UL signals / channels such as MSG3 PUSCH, MSGA preamble / PUSCH and / or PUSCH / PUCCH.

[0248] In addition, since the examples of the above-mentioned proposed methods can also be included as one of the implementation methods of the present disclosure, they can obviously be considered as a proposed method. In addition, the above-mentioned proposed methods can be implemented independently, but can also be implemented in the form of a combination (or merger) of some proposed methods. Information about whether to apply the proposed method (or information about the rules of the proposed method) can be notified to the UE by the base station through a predefined signal (e.g., a physical layer signal or a high-level signal), or a rule can be defined to notify it. In addition, the high layer in the present disclosure may include one or more of the functional layers such as MAC, RLC (Radio Link Control), PDCP (Packet Data Convergence Protocol), RRC and SDAP (Service Data Adaptation Protocol).

[0249] The methods, embodiments or descriptions for implementing the methods proposed in the present disclosure may be applied individually, or one or more methods (or embodiments or descriptions) may be applied in combination.

[0250] Fig. 9 A signaling method for uplink transmission and reception methods according to one embodiment of the present disclosure is illustrated.

[0251] Fig. 9 The signaling between a base station (eg, TRP 1, TRP 2) and a UE to which the method proposed in the present disclosure can be applied is illustrated. Here, UE / base station is only an example, and various devices can be applied alternatively. Fig. 9 It is only for the convenience of explanation and does not limit the scope of the present disclosure. In addition, depending on the situation and / or setting, it can be omitted. Fig. 9 Some of the steps shown.

[0252] In addition, despite Fig. 9 Not illustrated in the figure, but the UE can send UE capability information to the base station indicating that it has the ability to support dynamic waveform switching.

[0253] Reference Fig. 9 , the UE receives configuration information related to uplink transmission from the base station (S901).

[0254] Here, the configuration information related to uplink transmission may include information about whether dynamic waveform switching for uplink transmission is supported / allowed (hereinafter referred to as first information). In other words, the first information may be information indicating / configuring whether dynamic waveform switching for uplink transmission is enabled or disabled. Alternatively, the first information may be information indicating / configuring whether application of transform precoding for uplink transmission is dynamically changed / configured.

[0255] Here, according to the above embodiment, the first information (or configuration information including the first information) may be provided separately for each BWP (or each cell).

[0256] Here, uplink transmission may include PUSCH, PUCCH, PRACH, SRS, etc. Accordingly, the configuration information related to uplink transmission may correspond to RACH common configuration (RACH-ConfigCommon), Msg.A PUSCH configuration (MsgA-PUSCH-Config), PUSCH configuration (PUSCH-Config), PUCCH configuration (PUCCH-Config), etc.

[0257] The configuration information may be sent via higher layer signaling (eg, SIB, RRC signaling, etc.).

[0258] For example, according to the above-mentioned embodiment 1, a new parameter indicating / configuring whether dynamic waveform switching is supported / allowed is defined / introduced, and the first information can be provided via the new parameter.

[0259] Alternatively, an additional state that can be indicated / configured in a parameter indicating a waveform for existing uplink transmission (ie, indicating whether transform precoding is enabled or disabled) is defined / introduced, and the first information can be provided (ie, indicated / configured) through the additional state.

[0260] In addition, according to the above embodiment 2, dynamic waveform switching can be supported / allowed before (including after) the UE enters the RRC connected state. In this case, the first information can be sent through RACH configuration (eg, RACH-ConfigCommon, RACH-ConfigDedicated, etc.).

[0261] In addition, according to the above-mentioned embodiment 3, dynamic waveform switching may be supported / allowed only after the UE enters the RRC connected state. In this case, the first information may be sent via RRC establishment (e.g., RRC establishment message, etc.). In addition, the first information may be sent via PUSCH configuration (PUSCH-Config), PUCCH configuration (PUCCH-Config), etc.

[0262] The UE may receive control information (ie, downlink control information) for scheduling / triggering uplink transmission (ie, uplink signals / channels, such as PRACH, PUSCH, PUCCH, SRS, etc.) from the base station (S902).

[0263] Here, according to the above embodiment, the control information may include information (hereinafter referred to as second information) for indicating whether transform precoding for PUSCH is enabled or disabled (as indicated by first information supporting dynamic waveform switching (e.g., enabling dynamic waveform switching)).

[0264] Here, the second information may be information for indicating / configuring whether the waveform for uplink transmission is CP-OFDM or DFT-S-OFDM. In other words, the second information may be information for indicating / configuring whether to enable or disable transform precoding for uplink transmission (i.e., whether transform precoding is applied).

[0265] In addition, according to the above embodiment, the control information may be a MAC CE (e.g., RAR), in which case it may be sent via the PDSCH. Alternatively, the control information may be a DCI, in which case it may be sent via the PDCCH. In addition, if the transmission of the uplink signal / channel does not require control information (e.g., in the case of transmission of the first message for the random access procedure), this step may be omitted.

[0266] For example, according to the above-mentioned embodiment 2, control information (eg, via DCI scheduling PDSCH carrying RAR grant, DCI scheduling retransmission of Msg.3 PUSCH and / or Msg.A PUSCH, etc.) may be provided to the UE within the random access procedure.

[0267] In addition, according to the above-mentioned embodiment 3, control information may be provided to the UE after the UE enters the RRC connected state / mode (eg, via DCI scheduling the PUSCH, etc.).

[0268] In addition, for example, a 1-bit field (eg, a dynamic waveform switching indication field) for indicating whether transform precoding is enabled or disabled may be included in the control information. That is, the second information may be provided to the UE via a 1-bit field (eg, a dynamic waveform switching indication field).

[0269] In addition, according to the above embodiment, when the control information is DCI, the second information (e.g., 1-bit dynamic waveform switching indication field) can be configured separately for each DCI format (e.g., DCI format 0_1 ​​or DCI format 0_2). In other words, the 1-bit field (e.g., 1-bit dynamic waveform switching indication field) for indicating whether transform precoding is enabled or disabled can be configurable separately for each DCI format.

[0270] In addition, according to the above-mentioned embodiment 3, the second information (e.g., a 1-bit dynamic waveform switching indication field) can configure / indicate the waveform for uplink transmission as one of CP-OFDM and DFT-S-OFDM. In other words, the second information (e.g., a 1-bit dynamic waveform switching indication field) can indicate whether transform precoding is enabled or disabled for uplink transmission.

[0271] In addition, the second information (e.g., a 1-bit dynamic waveform switching indication field) can indicate whether transform precoding is enabled or disabled for uplink transmission by indicating whether it is the same as the indication value of higher-layer signaling (e.g., higher-layer parameter "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder") for enabling or disabling transform precoding.

[0272] In addition, the second information (eg, a 1-bit dynamic waveform switching indication field) may indicate whether transform precoding is enabled or disabled for uplink transmission by indicating whether transform precoding for a most recent PUSCH is the same as applied.

[0273] The UE sends an uplink transmission (ie, uplink signal / channel, such as PRACH, PUSCH, PUCCH, SRS, etc.) to the base station (S903).

[0274] Here, based on the control information (e.g., DCI, MAC CE) including second information (e.g., 1-bit dynamic waveform switching indication field), it can be determined whether to apply transform precoding to uplink transmission (i.e., the waveform for uplink transmission can be determined) based on the second information.

[0275] Here, even if the enabling or disabling of transform precoding is indicated / configured by high-layer signaling (e.g., high-layer parameter "transformPrecoder", "msg3-transformPrecoder" or "msgA-TransformPrecoder"), if the control information (e.g., DCI, MAC CE) includes the second information (e.g., a 1-bit dynamic waveform switching indication field), the enabling or disabling indication value of transform precoding indicated by the high-layer signaling can be ignored. That is, the UE can give priority to the second information (e.g., a 1-bit dynamic waveform switching indication field) in the control information (e.g., DCI, MAC CE) over the high-layer signaling.

[0276] In addition, whether to apply transform precoding to PUSCH (i.e., the waveform for uplink transmission can be determined) can be determined based on higher layer signaling (e.g., higher layer parameters "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder") based on the fact that control information (e.g., DCI, MAC CE) does not include the second information (e.g., a 1-bit dynamic waveform switching indication field). For example, even if the first information indicates that dynamic waveform switching is supported, if the DCI (e.g., the DCI field is a configurable DCI format 0_2) does not include the second information (e.g., a 1-bit dynamic waveform switching indication field), whether to apply transform precoding to PUSCH (i.e., the waveform for uplink transmission can be determined) can be determined based on an indication value of transform precoding enabled or disabled through higher layer signaling.

[0277] Here, uplink transmission may include PUSCH / SRS / PUCCH / PRACH, etc. For example, in the case of PUSCH, the control information may correspond to DCI for scheduling PUSCH, in the case of SRS, the control information may correspond to DCI for triggering transmission of SRS (in the case of aperiodic SRS transmission), and in the case of PUCCH, the control information may correspond to DCI for scheduling, for example, PDSCH. In addition, in the 4-step random access procedure (see Figure 7 ), the uplink transmission may correspond to MSG1 (i.e., a random access preamble or PRACH sent on the PRACH) and / or MSG3 (i.e., a PDSCH scheduled by a random access response UL grant) and in a 2-step random access procedure (see Figure 8 ), the uplink transmission may correspond to MSGA (ie, PUSCH and PRACH carrying random access preambles).

[0278] Fig.10 is a diagram illustrating an operation of a UE for an uplink transmission and reception method according to one embodiment of the present disclosure.

[0279] Fig.10 The operation of the UE based on the proposed method is illustrated. Fig.10 The examples are provided for ease of explanation and do not limit the scope of the present disclosure. Depending on the environment and / or settings, the Fig.10 In addition, Fig.10 The UE in is only an example and can be implemented as follows Fig.12 For example, Fig.12 The processor (102 / 202) can control the transceiver (106 / 206) to send and receive channels / signals / data / information, etc., and can also control Fig.12 The processor (102 / 202) stores the transmitted or received channel / signal / data / information etc. in the memory (104 / 204).

[0280] in addition, Fig.10 The operation can be done by Fig.12 One or more processors (102, 202) of the invention are used to process the Fig.10 The operation can be used to drive Fig.12 The instructions / programs (eg, instructions, executable codes) of at least one processor (eg, 102, 202) are stored in a memory (eg, Fig.12 in one or more memories (104, 204)).

[0281] In addition, despite Fig.10Not illustrated in the figure, but the UE can send UE capability information to the base station indicating that it has the ability to support dynamic waveform switching.

[0282] Reference Fig.10 , the UE receives configuration information related to uplink transmission from the base station (S1001).

[0283] Here, the configuration information related to uplink transmission may include information about whether dynamic waveform switching for uplink transmission is supported / allowed (hereinafter referred to as first information). In other words, the first information may be information indicating / configuring whether dynamic waveform switching for uplink transmission is enabled or disabled. Alternatively, the first information may be information indicating / configuring whether application of transform precoding for uplink transmission is dynamically changed / configured.

[0284] Here, according to the above embodiment, the first information (or configuration information including the first information) may be provided separately for each BWP (or each cell).

[0285] Here, uplink transmission may include PUSCH, PUCCH, PRACH, SRS, etc. Accordingly, the configuration information related to uplink transmission may correspond to RACH common configuration (RACH-ConfigCommon), Msg.A PUSCH configuration (MsgA-PUSCH-Config), PUSCH configuration (PUSCH-Config), PUCCH configuration (PUCCH-Config), etc.

[0286] For example, according to the above-mentioned embodiment 1, a new parameter indicating / configuring whether dynamic waveform switching is supported / allowed is defined / introduced, and the first information can be provided via the new parameter.

[0287] Alternatively, an additional state that can be indicated / configured in a parameter indicating a waveform for existing uplink transmission (ie, indicating whether transform precoding is enabled or disabled) is defined / introduced, and the first information can be provided (ie, indicated / configured) through the additional state.

[0288] In addition, according to the above embodiment 2, dynamic waveform switching can be supported / allowed before (including after) the UE enters the RRC connected state. In this case, the first information can be sent through RACH configuration (eg, RACH-ConfigCommon, RACH-ConfigDedicated, etc.).

[0289] In addition, according to the above-mentioned embodiment 3, dynamic waveform switching may be supported / allowed only after the UE enters the RRC connected state. In this case, the first information may be sent via RRC establishment (e.g., RRC establishment message, etc.). In addition, the first information may be sent via PUSCH configuration (PUSCH-Config), PUCCH configuration (PUCCH-Config), etc.

[0290] The UE may receive control information (ie, downlink control information) for scheduling / triggering uplink transmission (ie, uplink signals / channels, such as PRACH, PUSCH, PUCCH, SRS, etc.) from the base station ( S1002 ).

[0291] Here, according to the above embodiment, the control information may include information (hereinafter referred to as second information) for indicating whether transform precoding for PUSCH is enabled or disabled (as indicated by first information supporting dynamic waveform switching (e.g., enabling dynamic waveform switching)).

[0292] Here, the second information may be information for indicating / configuring whether the waveform for uplink transmission is CP-OFDM or DFT-S-OFDM. In other words, the second information may be information for indicating / configuring whether to enable or disable transform precoding for uplink transmission (i.e., whether transform precoding is applied).

[0293] In addition, according to the above embodiment, the control information may be a MAC CE (e.g., RAR), in which case it may be sent via the PDSCH. Alternatively, the control information may be a DCI, in which case it may be sent via the PDCCH. In addition, if the transmission of the uplink signal / channel does not require control information (e.g., in the case of transmission of the first message for the random access procedure), this step may be omitted.

[0294] For example, according to the above-mentioned embodiment 2, control information (eg, via DCI scheduling PDSCH carrying RAR grant, DCI scheduling retransmission of Msg.3 PUSCH and / or Msg.A PUSCH, etc.) may be provided to the UE within the random access procedure.

[0295] In addition, according to the above-mentioned embodiment 3, control information may be provided to the UE after the UE enters the RRC connected state / mode (eg, via DCI scheduling the PUSCH, etc.).

[0296] In addition, for example, a 1-bit field (eg, a dynamic waveform switching indication field) for indicating whether transform precoding is enabled or disabled may be included in the control information. That is, the second information may be provided to the UE via a 1-bit field (eg, a dynamic waveform switching indication field).

[0297] In addition, according to the above embodiment, when the control information is DCI, the second information (e.g., 1-bit dynamic waveform switching indication field) can be configured separately for each DCI format (e.g., DCI format 0_1 ​​or DCI format 0_2). In other words, the 1-bit field (e.g., 1-bit dynamic waveform switching indication field) for indicating whether transform precoding is enabled or disabled can be configurable separately for each DCI format.

[0298] In addition, according to the above-mentioned embodiment 3, the second information (e.g., a 1-bit dynamic waveform switching indication field) can configure / indicate the waveform for uplink transmission as one of CP-OFDM and DFT-S-OFDM. In other words, the second information (e.g., a 1-bit dynamic waveform switching indication field) can indicate whether transform precoding is enabled or disabled for uplink transmission.

[0299] In addition, the second information (e.g., a 1-bit dynamic waveform switching indication field) can indicate whether transform precoding is enabled or disabled for uplink transmission by indicating whether it is the same as the indication value of higher-layer signaling (e.g., higher-layer parameter "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder") for enabling or disabling transform precoding.

[0300] In addition, the second information (eg, a 1-bit dynamic waveform switching indication field) may indicate whether transform precoding is enabled or disabled for uplink transmission by indicating whether transform precoding for a most recent PUSCH is the same as applied.

[0301] The UE sends an uplink transmission (ie, uplink signal / channel, such as PRACH, PUSCH, PUCCH, SRS, etc.) to the base station (S1003).

[0302] Here, based on the control information (e.g., DCI, MAC CE) including second information (e.g., 1-bit dynamic waveform switching indication field), it can be determined whether to apply transform precoding to uplink transmission (i.e., the waveform for uplink transmission can be determined) based on the second information.

[0303] Here, even if the enabling or disabling of transform precoding is indicated / configured by high-layer signaling (e.g., high-layer parameter "transformPrecoder", "msg3-transformPrecoder" or "msgA-TransformPrecoder"), if the control information (e.g., DCI, MAC CE) includes the second information (e.g., a 1-bit dynamic waveform switching indication field), the enabling or disabling indication value of transform precoding performed by the high-layer signaling can be ignored. That is, the UE can give priority to the second information (e.g., a 1-bit dynamic waveform switching indication field) in the control information (e.g., DCI, MAC CE) over the high-layer signaling.

[0304] In addition, whether to apply transform precoding to PUSCH (i.e., the waveform for uplink transmission can be determined) can be determined based on higher layer signaling (e.g., higher layer parameters "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder") based on the fact that control information (e.g., DCI, MAC CE) does not include the second information (e.g., a 1-bit dynamic waveform switching indication field). For example, even if the first information indicates that dynamic waveform switching is supported, if the DCI (e.g., the DCI field is a configurable DCI format 0_2) does not include the second information (e.g., a 1-bit dynamic waveform switching indication field), whether to apply transform precoding to PUSCH (i.e., the waveform for uplink transmission can be determined) can be determined based on an indication value of transform precoding enabled or disabled through higher layer signaling.

[0305] Here, uplink transmission may include PUSCH / SRS / PUCCH / PRACH, etc. For example, in the case of PUSCH, the control information may correspond to DCI for scheduling PUSCH, in the case of SRS, the control information may correspond to DCI for triggering transmission of SRS (in the case of aperiodic SRS transmission), and in the case of PUCCH, the control information may correspond to DCI for scheduling, for example, PDSCH. In addition, in the 4-step random access procedure (see Figure 7 ), the uplink transmission may correspond to MSG1 (i.e., a random access preamble or PRACH sent on the PRACH) and / or MSG3 (i.e., a PDSCH scheduled by a random access response UL grant) and in a 2-step random access procedure (see Figure 8 ), the uplink transmission may correspond to MSGA (ie, PUSCH and PRACH carrying random access preambles).

[0306] Fig.11is a diagram illustrating an operation of a base station for an uplink transmission and reception method according to one embodiment of the present disclosure.

[0307] Fig.11 The operation of the base station based on the proposed method is illustrated. Fig.11 The examples are provided for ease of explanation and do not limit the scope of the present disclosure. Depending on the environment and / or settings, the Fig.11 In addition, Fig.11 The base station in is only an example and can be implemented as follows Fig.12 For example, Fig.12 The processor (102 / 202) can control the transceiver (106 / 206) to send and receive channels / signals / data / information, etc., and can also control Fig.12 The processor (102 / 202) stores the transmitted or received channel / signal / data / information etc. in the memory (104 / 204).

[0308] in addition, Fig.11 The operation can be done by Fig.12 One or more processors (102, 202) of the invention are used to process the Fig.11 The operation can be used to drive Fig.12 The instructions / programs (eg, instructions, executable codes) of at least one processor (eg, 102, 202) are stored in a memory (eg, Fig.12 in one or more memories (104, 204)).

[0309] In addition, despite Fig.11 Although not shown in the figure, the base station may receive UE capability information from the UE indicating that the UE has the capability to support dynamic waveform switching.

[0310] Reference Fig.11 , the base station sends configuration information related to uplink transmission to the UE (S1101).

[0311] Here, the configuration information related to uplink transmission may include information about whether dynamic waveform switching for uplink transmission is supported / allowed (hereinafter referred to as first information). In other words, the first information may be information indicating / configuring whether dynamic waveform switching for uplink transmission is enabled or disabled. Alternatively, the first information may be information indicating / configuring whether application of transform precoding for uplink transmission is dynamically changed / configured.

[0312] Here, according to the above embodiment, the first information (or configuration information including the first information) may be provided separately for each BWP (or each cell).

[0313] Here, uplink transmission may include PUSCH, PUCCH, PRACH, SRS, etc. Accordingly, the configuration information related to uplink transmission may correspond to RACH common configuration (RACH-ConfigCommon), Msg.A PUSCH configuration (MsgA-PUSCH-Config), PUSCH configuration (PUSCH-Config), PUCCH configuration (PUCCH-Config), etc.

[0314] For example, according to the above-mentioned embodiment 1, a new parameter indicating / configuring whether dynamic waveform switching is supported / allowed is defined / introduced, and the first information can be provided via the new parameter.

[0315] Alternatively, an additional state that can be indicated / configured in a parameter indicating a waveform for existing uplink transmission (ie, indicating whether transform precoding is enabled or disabled) is defined / introduced, and the first information can be provided (ie, indicated / configured) through the additional state.

[0316] In addition, according to the above embodiment 2, dynamic waveform switching can be supported / allowed before (including after) the UE enters the RRC connected state. In this case, the first information can be sent through RACH configuration (eg, RACH-ConfigCommon, RACH-ConfigDedicated, etc.).

[0317] In addition, according to the above-mentioned embodiment 3, dynamic waveform switching may be supported / allowed only after the UE enters the RRC connected state. In this case, the first information may be sent via RRC establishment (e.g., RRC establishment message, etc.). In addition, the first information may be sent via PUSCH configuration (PUSCH-Config), PUCCH configuration (PUCCH-Config), etc.

[0318] The base station may send control information (ie, downlink control information) for scheduling / triggering uplink transmission (ie, uplink signals / channels, such as PRACH, PUSCH, PUCCH, SRS, etc.) to the UE (S1102).

[0319] Here, according to the above embodiment, the control information may include information (hereinafter referred to as second information) for indicating whether transform precoding for PUSCH is enabled or disabled (as indicated by first information supporting dynamic waveform switching (e.g., enabling dynamic waveform switching)).

[0320] Here, the second information may be information for indicating / configuring whether the waveform for uplink transmission is CP-OFDM or DFT-S-OFDM. In other words, the second information may be information for indicating / configuring whether to enable or disable transform precoding for uplink transmission (i.e., whether transform precoding is applied).

[0321] In addition, according to the above embodiment, the control information may be a MAC CE (e.g., RAR), in which case it may be sent via the PDSCH. Alternatively, the control information may be a DCI, in which case it may be sent via the PDCCH. In addition, if the transmission of the uplink signal / channel does not require control information (e.g., in the case of transmission of the first message for the random access procedure), this step may be omitted.

[0322] For example, according to the above-mentioned embodiment 2, control information (eg, via DCI scheduling PDSCH carrying RAR grant, DCI scheduling retransmission of Msg.3 PUSCH and / or Msg.A PUSCH, etc.) may be provided to the UE within the random access procedure.

[0323] In addition, according to the above-mentioned embodiment 3, control information may be provided to the UE after the UE enters the RRC connected state / mode (eg, via DCI scheduling the PUSCH, etc.).

[0324] In addition, for example, a 1-bit field (eg, a dynamic waveform switching indication field) for indicating whether transform precoding is enabled or disabled may be included in the control information. That is, the second information may be provided to the UE via a 1-bit field (eg, a dynamic waveform switching indication field).

[0325] In addition, according to the above embodiment, when the control information is DCI, the second information (e.g., 1-bit dynamic waveform switching indication field) can be configured separately for each DCI format (e.g., DCI format 0_1 ​​or DCI format 0_2). In other words, the 1-bit field (e.g., 1-bit dynamic waveform switching indication field) for indicating whether transform precoding is enabled or disabled can be configurable separately for each DCI format.

[0326] In addition, according to the above-mentioned embodiment 3, the second information (e.g., a 1-bit dynamic waveform switching indication field) can configure / indicate the waveform for uplink transmission as one of CP-OFDM and DFT-S-OFDM. In other words, the second information (e.g., a 1-bit dynamic waveform switching indication field) can indicate whether transform precoding is enabled or disabled for uplink transmission.

[0327] In addition, the second information (e.g., a 1-bit dynamic waveform switching indication field) can indicate whether transform precoding is enabled or disabled for uplink transmission by indicating whether it is the same as the indication value of higher-layer signaling (e.g., higher-layer parameter "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder") for enabling or disabling transform precoding.

[0328] In addition, the second information (eg, a 1-bit dynamic waveform switching indication field) may indicate whether transform precoding is enabled or disabled for uplink transmission by indicating whether transform precoding for a most recent PUSCH is the same as applied.

[0329] The base station receives uplink transmission (ie, uplink signal / channel, such as PRACH, PUSCH, PUCCH, SRS, etc.) from the UE (S1103).

[0330] Here, based on the control information (e.g., DCI, MAC CE) including second information (e.g., 1-bit dynamic waveform switching indication field), it can be determined whether to apply transform precoding to uplink transmission (i.e., the waveform for uplink transmission can be determined) based on the second information.

[0331] Here, even if the enabling or disabling of transform precoding is indicated / configured by high-layer signaling (e.g., high-layer parameter "transformPrecoder", "msg3-transformPrecoder" or "msgA-TransformPrecoder"), if the control information (e.g., DCI, MAC CE) includes the second information (e.g., a 1-bit dynamic waveform switching indication field), the enabling or disabling indication value for transform precoding by the high-layer signaling can be ignored. That is, the UE can give priority to the second information (e.g., a 1-bit dynamic waveform switching indication field) in the control information (e.g., DCI, MAC CE) over the high-layer signaling.

[0332] In addition, whether to apply transform precoding to PUSCH (i.e., the waveform for uplink transmission can be determined) can be determined based on higher layer signaling (e.g., higher layer parameters "transformPrecoder", "msg3-transformPrecoder", or "msgA-TransformPrecoder") based on the fact that control information (e.g., DCI, MAC CE) does not include the second information (e.g., a 1-bit dynamic waveform switching indication field). For example, even if the first information indicates that dynamic waveform switching is supported, if the DCI (e.g., the DCI field is a configurable DCI format 0_2) does not include the second information (e.g., a 1-bit dynamic waveform switching indication field), whether to apply transform precoding to PUSCH (i.e., the waveform for uplink transmission can be determined) can be determined based on an indication value of transform precoding enabled or disabled through higher layer signaling.

[0333] Here, uplink transmission may include PUSCH / SRS / PUCCH / PRACH, etc. For example, in the case of PUSCH, the control information may correspond to DCI for scheduling PUSCH, in the case of SRS, the control information may correspond to DCI for triggering transmission of SRS (in the case of aperiodic SRS transmission), and in the case of PUCCH, the control information may correspond to DCI for scheduling, for example, PDSCH. In addition, in the 4-step random access procedure (see Figure 7 ), the uplink transmission may correspond to MSG1 (i.e., a random access preamble or PRACH sent on the PRACH) and / or MSG3 (i.e., a PDSCH scheduled by a random access response UL grant) and in a 2-step random access procedure (see Figure 8 ), the uplink transmission may correspond to MSGA (ie, PUSCH and PRACH carrying random access preambles).

[0334] General devices to which the present disclosure can be applied

[0335] Fig.12 is a diagram illustrating a block diagram of a wireless communication device according to an embodiment of the present disclosure.

[0336] Reference Fig.12 , the first wireless device 100 and the second wireless device 200 can send and receive wireless signals through various radio access technologies (e.g., LTE, NR).

[0337] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, function, process, suggestion, method and / or operation flowchart disclosed in the present disclosure. For example, the processor 102 may transmit a wireless signal including the first information / signal through the transceiver 106 after generating the first information / signal by processing the information in the memory 104. In addition, the processor 102 may receive a wireless signal including the second information / signal through the transceiver 106, and then store the information obtained by the signal processing of the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing all or part of the processing controlled by the processor 102 or for executing the description, function, process, suggestion, method and / or operation flowchart disclosed in the present disclosure. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver 106 may be connected to the processor 102 and may send and / or receive wireless signals through one or more antennas 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used in conjunction with an RF (radio frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0338] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, function, process, suggestion, method and / or operation flowchart disclosed in the present disclosure. For example, the processor 202 may generate third information / signal by processing the information in the memory 204, and then transmit the wireless signal including the third information / signal through the transceiver 206. In addition, the processor 202 may receive the wireless signal including the fourth information / signal through the transceiver 206, and then store the information obtained by the signal processing of the fourth information / signal in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing all or part of the processing controlled by the processor 202 or for executing the description, function, process, suggestion, method and / or operation flowchart disclosed in the present disclosure. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver 206 may be connected to the processor 202 and may send and / or receive wireless signals through one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used in conjunction with an RF unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0339] In the following, the hardware elements of the wireless device 100, 200 will be described in more detail. Without limitation thereto, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102, 202 may generate one or more PDUs (protocol data units) and / or one or more SDUs (service data units) according to the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts included in the present disclosure. One or more processors 102, 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure. One or more processors 102, 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed in the present disclosure to provide it to one or more transceivers 106, 206. One or more processors 102, 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106, 206 according to the descriptions, functions, procedures, suggestions, methods, and / or operational flow charts disclosed in the present disclosure, and obtain the PDU, SDU, message, control information, data, or information.

[0340] One or more processors 102, 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) may be included in one or more processors 102, 202. The descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, processes, functions, and the like. Firmware or software configured to execute the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure may be included in one or more processors 102, 202, or may be stored in one or more memories 104, 204 and driven by one or more processors 102, 202. The descriptions, functions, processes, suggestions, methods and / or operational flow charts disclosed in the present disclosure may be implemented by using firmware or software in the form of codes, commands and / or command sets.

[0341] One or more memories 104, 204 may be connected to one or more processors 102, 202 and may store data, signals, messages, information, programs, codes, instructions, and / or commands in various forms. One or more memories 104, 204 may be configured with ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104, 204 may be located inside and / or outside one or more processors 102, 202. In addition, one or more memories 104, 204 may be connected to one or more processors 102, 202 via various technologies such as wired or wireless connections.

[0342] One or more transceivers 106, 206 may send user data, control information, wireless signals / channels, etc. mentioned in the method and / or operation flow chart of the present disclosure to one or more other devices. One or more transceivers 106, 206 may receive user data, control information, wireless signals / channels, etc. mentioned in the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure from one or more other devices. For example, one or more transceivers 106, 206 may be connected to one or more processors 102, 202 and may send and receive wireless signals. For example, one or more processors 102, 202 may control one or more transceivers 106, 206 to send user data, control information or wireless signals to one or more other devices. In addition, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information or wireless signals from one or more other devices. In addition, one or more transceivers 106, 206 may be connected to one or more antennas 108, 208, and one or more transceivers 106, 206 may be configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the description, functions, processes, suggestions, methods, and / or operation flow charts, etc. disclosed in the present disclosure through one or more antennas 108, 208. In the present disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may convert received wireless signals / channels, etc. from RF band signals into baseband signals to process received user data, control information, wireless signals / channels, etc. by using one or more processors 102, 202. One or more transceivers 106, 206 may convert user data, control information, wireless signals / channels, etc. processed by using one or more processors 102, 202 from baseband signals into RF band signals. Thus, one or more of the transceivers 106 , 206 may include (analog) oscillators and / or filters.

[0343] The above-mentioned embodiments are to combine the elements and features of the present disclosure in a predetermined form. Unless otherwise explicitly mentioned, each element or feature should be regarded as optional. Each element or feature can be implemented in a form that is not combined with other elements or features. In addition, the embodiments of the present disclosure may include a combination of some elements and / or features. The order of the operations described in the embodiments of the present disclosure may be changed. Some elements or features of an embodiment may be included in other embodiments, or may be replaced by corresponding elements or features of other embodiments. Obviously, the embodiments may include claims that do not have a clear reference relationship in the combined claims, or may be included as new claims by modification after application.

[0344] It is clear to those skilled in the relevant art that the present disclosure can be implemented in other specific forms within the scope of the essential features of the present disclosure. Therefore, the above detailed description should not be interpreted restrictively in every aspect, but should be considered as illustrative. The scope of the present disclosure should be determined by the reasonable interpretation of the attached claims, and all changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure.

[0345] The scope of the present disclosure includes software or machine executable commands (e.g., operating systems, applications, firmware, programs, etc.) that perform operations in a device or computer according to the methods of various embodiments, and non-transitory computer-readable media that enable software or commands, etc. to be stored and executable in a device or computer. Commands that can be used to program a processing system that performs the features described in the present disclosure can be stored in a storage medium or a computer-readable storage medium, and the features described in the present disclosure can be implemented by using a computer program product that includes such a storage medium. The storage medium may include a high-speed random access memory, such as, for example, DRAM, SRAM, DDR RAM, or other random access solid-state storage devices, but is not limited thereto, and it may include non-volatile memory, such as, for example, one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory optionally includes one or more storage devices located away from the processor. The memory, or alternatively, the non-volatile memory device in the memory includes a non-transitory computer-readable storage medium. The features described in this disclosure may be stored in any machine-readable medium to control the hardware of a processing system, and may be integrated into software and / or firmware that allows the processing system to interact with other mechanisms using the results from 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.

[0346] Here, the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure may include narrowband Internet of Things for low-power communication, as well as LTE, NR and 6G. Here, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, which may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2 and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure may perform communication based on LTE-M technology. Here, for example, LTE-M technology may be an example of LPWAN technology and may be referred to as various names such as eMTC (enhanced machine type communication). For example, LTE-M technology may be implemented in at least any one of various standards, including 1) LTE CAT 0; 2) LTE Cat M1; 3) LTE Cat M2; 4) LTE non-BL (non-bandwidth limited); 5) LTE-MTC; 6) LTE machine type communication; and / or 7) LTE M, etc., and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100, 200 of the present disclosure may include at least any one of ZigBee, Bluetooth, and a low power wide area network (LPWAN) considering low power communication, and is not limited to the above names. For example, ZigBee technology can generate a PAN (Personal Area Network) related to small / low power digital communication based on various standards (e.g., IEEE 802.15.4, etc.), and can be called various names.

[0347] Industrial Applicability

[0348] The method proposed in the present disclosure is mainly described based on examples applied to 3GPP LTE / LTE-A and 5G systems, but can also be applied to various wireless communication systems other than 3GPP LTE / LTE-A and 5G systems.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising the following steps: Receiving configuration information related to a physical uplink shared channel PUSCH for a specific bandwidth part BWP from a base station, wherein the configuration information includes first information on whether dynamic waveform switching is supported for the PUSCH; receiving downlink control information DCI for scheduling the PUSCH from the base station; and sending the PUSCH to the base station, Wherein, based on the DCI including second information for indicating whether to enable or disable transform precoding for the PUSCH when the dynamic waveform switching is supported, whether to apply the transform precoding to the PUSCH is determined based on the second information.

2. The method according to claim 1, wherein: A 1-bit field for indicating whether the transform precoding is enabled or disabled is configured individually for each DCI format.

3. The method according to claim 2, wherein: Based on the fact that the DCI does not include the second information, even if the dynamic waveform switching is supported, whether the transform precoding is applied to the PUSCH is determined according to an indication value of enabling or disabling transform precoding through higher layer signaling.

4. The method according to claim 2, wherein: Based on the DCI including the second information, an indication value of enabling or disabling transform precoding through higher layer signaling is ignored.

5. The method according to claim 1, wherein: The second information indicates whether the transform precoding for the PUSCH is enabled or disabled by indicating whether the second information is the same as an indication value of enabling or disabling transform precoding through higher layer signaling.

6. The method according to claim 1, wherein: The second information indicates whether the transform precoding for the PUSCH is enabled or disabled by indicating whether the transform precoding for the most recent PUSCH is applied.

7. The method according to claim 1, further comprising the steps of: Sending UE capability information supporting the dynamic waveform switching to the base station.

8. A user equipment UE operating in a wireless communication system, the UE comprising: at least one transceiver, the at least one transceiver configured to send and receive wireless signals; as well as at least one processor configured to control the at least one transceiver, Wherein, the at least one processor is configured to: Receiving configuration information related to a physical uplink shared channel PUSCH for a specific bandwidth part BWP from a base station, wherein the configuration information includes first information on whether dynamic waveform switching is supported for the PUSCH; receiving downlink control information DCI for scheduling the PUSCH from the base station; and sending the PUSCH to the base station, Wherein, based on the DCI including second information for indicating whether to enable or disable transform precoding for the PUSCH when the dynamic waveform switching is supported, whether to apply the transform precoding to the PUSCH is determined based on the second information.

9. At least one non-transitory computer-readable medium storing at least one instruction, wherein: The at least one instruction executable by at least one processor controls a user equipment UE to: Receiving configuration information related to a physical uplink shared channel PUSCH for a specific bandwidth part BWP from a base station, wherein the configuration information includes first information on whether dynamic waveform switching is supported for the PUSCH; receiving downlink control information DCI for scheduling the PUSCH from the base station; and sending the PUSCH to the base station, Wherein, based on the DCI including second information for indicating whether to enable or disable transform precoding for the PUSCH when the dynamic waveform switching is supported, whether to apply the transform precoding to the PUSCH is determined based on the second information.

10. A processing device, the processing device being configured to control a user equipment UE in a wireless communication system, the processing device comprising: at least one processor; as well as at least one computer memory operatively connected to the at least one processor and storing instructions that, upon execution by the at least one processor, perform operations comprising: Receiving configuration information related to a physical uplink shared channel PUSCH for a specific bandwidth part BWP from a base station, wherein the configuration information includes first information on whether dynamic waveform switching is supported for the PUSCH; receiving downlink control information DCI for scheduling the PUSCH from the base station; and sending the PUSCH to the base station, Wherein, based on the DCI including second information for indicating whether to enable or disable transform precoding for the PUSCH when the dynamic waveform switching is supported, whether to apply the transform precoding to the PUSCH is determined based on the second information.

11. A method performed by a base station in a wireless communication system, the method comprising the following steps: Sending configuration information related to a physical uplink shared channel PUSCH for a specific bandwidth part BWP to a user equipment UE, wherein the configuration information includes first information on whether dynamic waveform switching is supported for the PUSCH; Sending downlink control information DCI for scheduling the PUSCH to the UE; and receiving the PUSCH from the UE, Wherein, based on the DCI including second information for indicating whether to enable or disable transform precoding for the PUSCH when the dynamic waveform switching is supported, whether to apply the transform precoding to the PUSCH is determined based on the second information.

12. A base station operating in a wireless communication system, the base station comprising: at least one transceiver, the at least one transceiver configured to send and receive wireless signals; as well as at least one processor configured to control the at least one transceiver, Wherein, the at least one processor is configured to: Sending configuration information related to a physical uplink shared channel PUSCH for a specific bandwidth part BWP to a user equipment UE, wherein the configuration information includes first information on whether dynamic waveform switching is supported for the PUSCH; Sending downlink control information DCI for scheduling the PUSCH to the UE; and receiving the PUSCH from the UE, Wherein, based on the DCI including second information for indicating whether to enable or disable transform precoding for the PUSCH when the dynamic waveform switching is supported, whether to apply the transform precoding to the PUSCH is determined based on the second information.

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