Method and apparatus for uplink channel repetitive transmission in wireless communication system

Abstract

To provide a method and an apparatus for performing uplink channel repetitive transmission in a wireless communication system.SOLUTION: A method for a terminal to repetitively transmit an uplink channel in a wireless communication system according to one embodiment of the present disclosure includes: an uplink channel mapping step of mapping one uplink channel to multiple transmission opportunities (TOs), where the multiple TOs are associated with multiple transmission units (TUs) that are less than the number of the multiple TOs, and each of one or more specific TUs among the multiple TUs includes two or more contiguous TOs; a step of mapping a spatially related reference signal (RS) to each of the multiple TOs; and a step of transmitting one uplink channel to a base station on the basis of the spatially related reference signal in each of the multiple Tos. The spatially related reference signals mapped to the two or more contiguous TOs included in the one or more specific TUs may be identical to or may be different from each other.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and particularly to a method and apparatus for repeatedly transmitting an uplink channel in a wireless communication system.

Background Art

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

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

Summary of the Invention

Problems to be Solved by the Invention

[0004] A technical problem of the present disclosure is to provide a method and apparatus for a terminal to repeatedly transmit an uplink channel.

[0005] A further technical problem of the present disclosure is to provide a method and apparatus for a terminal to repeatedly transmit an uplink channel based on a spatial relation reference signal.

[0006] A further technical problem of the present disclosure is to provide a method and apparatus for mapping a spatial relation reference signal to an uplink channel repeated transmission when a split occurs for a transmission unit (TU) when the terminal repeatedly transmits the uplink channel.

[0007] The technical problem to be achieved in the present disclosure is not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art in the technical field to which the present disclosure belongs from the following description.

Means for Solving the Problems

[0008] A method for a terminal to repeatedly transmit an uplink channel in a wireless communication system according to an aspect of the present disclosure, the method comprising: mapping one uplink channel to a plurality of transmission opportunities (TOs), wherein the plurality of TOs are associated with a plurality of transmission units (TUs) that are fewer in number than the number of the plurality of TOs, and each of one or more specific TUs among the plurality of TUs includes two or more contiguous TOs, an uplink channel mapping step; mapping a spatial relation reference signal (RS) to each of the plurality of TOs; and transmitting the one uplink channel to a base station based on the spatial relation reference signal in each of the plurality of TOs, wherein the spatial relation reference signals mapped to the two or more contiguous TOs included in the one or more specific TUs may be the same as or different from each other.

[0009] In a wireless communication system according to a further aspect of the present disclosure, a terminal that repeatedly transmits an uplink channel, the terminal includes one or more transceivers, and one or more processors coupled to the one or more transceivers, the one or more processors map one uplink channel to a plurality of transmission opportunities (TOs), the plurality of TOs are associated with a plurality of transmission units (TUs) that are fewer in number than the plurality of TOs, each of one or more specific TUs among the plurality of TUs includes two or more contiguous TOs, map a spatial reference signal (RS) to each of the plurality of TOs, and are configured to transmit the one uplink channel to a base station via the transceiver based on the spatial reference signal in each of the plurality of TOs, the spatial reference signals mapped to the two or more contiguous TOs included in the one or more specific TUs may be the same as or different from each other.

[0010] In a wireless communication system according to a further aspect of the present disclosure, a method for a base station to repeatedly receive an uplink channel, the method includes transmitting configuration information related to uplink channel repeated transmission to a terminal, and repeatedly receiving one uplink channel from the terminal based on the configuration information, the one uplink channel is mapped to a plurality of transmission opportunities (TOs), the plurality of TOs are associated with a plurality of transmission units (TUs) that are fewer in number than the plurality of TOs, each of one or more specific TUs among the plurality of TUs includes two or more contiguous TOs, a spatial reference signal (RS) is mapped to each of the plurality of TOs, the one uplink channel is received from the terminal based on the spatial reference signal in each of the plurality of TOs, and the spatial reference signals mapped to the two or more contiguous TOs included in the one or more specific TUs may be the same as or different from each other.

Advantages of the Invention

[0011] According to an embodiment of the present disclosure, a method and apparatus for a terminal to repeatedly transmit an uplink channel can be provided.

[0012] According to an embodiment of the present disclosure, a method and an apparatus for a terminal to repeatedly transmit an uplink channel based on a spatial relation reference signal can be provided.

[0013] According to an embodiment of the present disclosure, when a split occurs for a transmission unit (TU) when the terminal repeatedly transmits an uplink channel, a method and an apparatus for mapping a spatial relation reference signal to the repeated uplink channel transmission can be provided.

[0014] According to an embodiment of the present disclosure, when a specific transmission unit (TU) is split by a resource boundary in the repeated uplink channel transmission, it is possible to resolve the ambiguity with respect to the mapping of the spatial relation reference signal.

[0015] According to an embodiment of the present disclosure, based on a downlink control channel transmitted from an MTRP, even when the downlink control channel does not include TCI information, the TCI related to the downlink signal transmitted from an STRP can be clearly set or determined.

[0016] The effects obtained from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present disclosure pertains from the following description.

Brief Description of the Drawings

[0017] The accompanying drawings, which are included as a part of the detailed description to assist in understanding the present disclosure, provide embodiments related to the present disclosure and explain the technical features of the present disclosure together with the detailed description.

[0018]

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MODE FOR CARRYING OUT THE INVENTION

[0019] Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description disclosed below together with the accompanying drawings is for explaining exemplary embodiments of the present disclosure and is not for showing the only possible embodiments for implementing the present disclosure. The following detailed description includes specific details to provide a complete understanding of the present disclosure. However, it is understood by those skilled in the art that the present disclosure can be implemented without such specific details.

[0020] In some cases, to avoid ambiguity in the concept of the present disclosure, well-known structures and devices may be omitted and may be shown in the form of a block diagram centered on the core functions of each structure and device.

[0021] In the present disclosure, when a certain component is "connected", "coupled" or "connected" to another component, this can include not only a direct connection relationship but also an indirect connection relationship in which there are further other components between them. Also, in the present disclosure, the terms "comprising" or "having" identify the presence of the recited features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or groups thereof.

[0022] In the present disclosure, terms such as "first", "second", etc. are only used for the purpose of distinguishing one component from another and are not used to limit the components. Unless otherwise specifically mentioned, they do not limit the order or importance, etc. between the components. Therefore, within the scope of the present disclosure, the first component in one embodiment can also be referred to as the second component in another embodiment, and similarly, the second component in one embodiment can be referred to as the first component in another embodiment.

[0023] The terms used in this disclosure are for the purpose of describing particular embodiments and are not intended to limit the scope of the claims. As used in the description of the embodiments and the appended claims, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. The term "and / or" as used in this disclosure may refer to one of the related listed items or include any and all possible combinations of two or more of them. Also, in this disclosure, " / " between words has the same meaning as "and / or" unless otherwise specified.

[0024] This disclosure is described with respect to a wireless communication network or a wireless communication system, and the operations performed in the wireless communication network may be performed in the process where a device (e.g., a base station) that governs the wireless communication network controls the network and transmits or receives signals, or may be performed in the process where a terminal connected to the wireless network transmits or receives signals to / from the network or between terminals.

[0025] In this disclosure, transmitting or receiving a channel includes the meaning of transmitting or receiving information or a signal on the channel. For example, transmitting a control channel means transmitting control information or a signal on the control channel. Similarly, transmitting a data channel means transmitting data information or a signal on the data channel.

[0026] Hereinafter, the downlink (DL) means communication from the base station to the terminal, and the uplink (UL) means communication from the terminal to the base station. In the downlink, the transmitter may be part of the base station and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal and the receiver may be part of the base station. The base station may be expressed as the first communication device, and the terminal may be expressed as the second communication device. The base station (BS: Base Station) may be replaced by terms such as a fixed station, Node B, eNB (evolved-NodeB), gNB (Next Generation NodeB), BTS (base transceiver system), access point (AP: Access Point), network (5G network), AI (Artificial Intelligence) system / module, RSU (road side unit), robot, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc. Also, the terminal (Terminal) may be fixed or mobile and may be replaced by terms such as UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, RSU (road side unit), robot, AI (Artificial Intelligence) module, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.

[0027] The following techniques may be used in various wireless connection systems such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA may be implemented by wireless technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA may be implemented by wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA may be implemented by wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) (registered trademark) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0028] For the sake of clarity, the description will be based on the 3GPP communication system (e.g., LTE-A, NR), but the technical idea of the present disclosure is not limited thereto. LTE means the technology after 3GPP TS (Technical Specification) 36.xxx Release 8. Specifically, the LTE technology after 3GPP TS 36.xxx Release 10 is called LTE-A, and the LTE technology after 3GPP TS 36.xxx Release 13 is called LTE-A pro. 3GPP NR means the technology after TS 38.xxx Release 15. LTE / NR may be called the 3GPP system. "xxx" means the detailed number of the standard document. LTE / NR may be called the 3GPP system. Regarding the background technology, terms, abbreviations, etc. used in the description of the present disclosure, reference can be made to the matters described in the standard documents published before the present disclosure. For example, the following documents can be referred to.

[0029] In 3GPP LTE, reference can be made to TS 36.211 (Physical Channels and Modulation), TS 36.212 (Multiplexing and Channel Coding), TS 36.213 (Physical Layer Procedures), TS 36.300 (General Description), TS 36.331 (Radio Resource Control).

[0030] In 3GPP NR, reference can be made to TS 38.211 (Physical Channels and Modulation), TS 38.212 (Multiplexing and Channel Coding), TS 38.213 (Physical Layer Procedures for Control), TS 38.214 (Physical Layer Procedures for Data), TS 38.300 (General Description of NR and NG-RAN (New Generation-Radio Access Network)), TS 38.331 (Radio Resource Control Protocol Specification).

[0031] The abbreviations of the terms that can be used in the present disclosure are defined as follows.

[0032] - BM: Beam Management

[0033] - CQI: Channel Quality Indicator

[0034] - CRI: Channel State Information - Reference Signal Resource Indicator

[0035] - CSI: Channel State Information

[0036] - CSI-IM: Channel State Information - Interference Measurement

[0037] - CSI-RS: Channel State Information - Reference Signal

[0038] - DMRS: Demodulation Reference Signal

[0039] - FDM: Frequency Division Multiplexing

[0040] - FFT: Fast Fourier Transform

[0041] - IFDMA: Interleaved Frequency Division Multiple Access

[0042] - IFFT: Inverse Fast Fourier Transform

[0043] - L1-RSRP: Layer 1 reference signal received power

[0044] - L1-RSRQ: Layer 1 reference signal received quality

[0045] - MAC: medium access control

[0046] - NZP: non-zero power

[0047] - OFDM: orthogonal frequency division multiplexing

[0048] - PDCCH: physical downlink control channel

[0049] - PDSCH: physical downlink shared channel

[0050] - PMI: precoding matrix indicator

[0051] - RE: resource element

[0052] - RI: Rank indicator

[0053] - RRC: radio resource control

[0054] - RSSI: received signal strength indicator

[0055] - Rx: Reception

[0056] - QCL: Quasi co-location

[0057] - SINR: Signal to interference and noise ratio

[0058] - SSB (or, SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH))

[0059] - TDM: Time division multiplexing

[0060] - TRP: Transmission and reception point

[0061] - TRS: Tracking reference signal

[0062] - Tx: Transmission

[0063] - UE: User equipment

[0064] - ZP: Zero power

[0065] System general

[0066] As more communication devices demand greater communication capacity, there is a growing need for mobile broadband communication that offers improvements over existing radio access technologies (RATs). In addition, massive Machine Type Communications (MTC), which involves connecting a large number of devices and things to provide various services anytime and anywhere, is also one of the major issues to be considered in next-generation communication. Furthermore, the design of communication systems that take into account services / terminals sensitive to reliability and latency is also being discussed. Thus, the introduction of next-generation RATs that consider enhanced mobile broadband communication (eMBB), massive MTC (mMTC), Ultra-Reliable and Low Latency Communication (URLLC), etc. is being discussed. For the sake of convenience in this disclosure, this technology is referred to as NR. NR is an expression representing an example of 5G RAT.

[0067] A 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's OFDM parameters. Alternatively, the new RAT system may directly follow the numerology of existing LTE / LTE-A but can support a larger system bandwidth (e.g., 100 MHz). Or, one cell can also support multiple numerologies. That is, terminals operating with different numerologies may coexist within one cell.

[0068] Numerology corresponds to one subcarrier spacing in the frequency domain. By scaling the reference subcarrier spacing by an integer N, different numerologies can be defined.

[0069] FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure is applicable.

[0070] Referring to FIG. 1, the NG-RAN is composed of gNBs that provide NG-RA (NG-Radio Access) user plane (i.e., new AS (access stratum) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and control plane (RRC) protocol terminations for UEs. The gNBs are interconnected via the Xn interface. The gNBs are also connected to the NGC (New Generation Core) via the NG interface. More specifically, the gNBs are connected to the AMF (Access and Mobility Management Function) via the N2 interface and to the UPF (User Plane Function) via the N3 interface.

[0071] FIG. 2 illustrates the frame structure in a wireless communication system to which the present disclosure is applicable.

[0072] The NR system can support a number of numerologies. Here, the numerology may be defined by the subcarrier spacing and the cyclic prefix (CP) overhead. At this time, a number of subcarrier spacings may be derived by scaling the basic (reference) subcarrier spacing by an integer N (or μ). Also, even assuming that a very low subcarrier spacing is not used at a very high carrier frequency, the numerology used may be selected independently of the frequency band. Also, in the NR system, various frame structures based on a number of numerologies may be supported.

[0073] The OFDM numerologies and frame structures that can be considered in the NR system are described below. A number of OFDM numerologies supported in the NR system may be defined as shown in Table 1 below.

[0074]

Table 1

[0075] NR supports a number of numerologies (or subcarrier spacings (SCS)) for supporting various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and when the SCS is 30 kHz / 60 kHz, it supports dense-urban, lower latency, and wider carrier bandwidth, and when the SCS is 60 kHz or higher, it supports a bandwidth greater than 24.25 GHz to overcome phase noise.

[0076] The NR frequency band is defined as two types (FR1, FR2) of frequency ranges. FR1 and FR2 may be configured as shown in Table 2 below. Also, FR2 can mean millimeter wave (mmW).

[0077]

Table 2

[0078] Regarding the frame structure in the NR system, the sizes of various fields in the time domain are T c = 1 / (Δf max ·N f ) times the time unit. Here, Δf max = 480·10 3 Hz, and Nf is 4096. Downlink and uplink transmissions are at T f = 1 / (Δf max N f / 100)·T c = 10 ms intervals and are organized into radio frames. Here, each radio frame has T sf =(Δf max N f / 1000)·T c = 1 ms intervals and is composed of 10 subframes. In this case, there may be one set of frames for the uplink and one set of frames for the downlink. Also, the transmission at the uplink frame number i from the terminal must start T TA =(N TA +N TA,offset )T c before the start of the corresponding downlink frame at the terminal. For the subcarrier spacing configuration μ, a slot is numbered in increasing order of n s μ ∈ {0,..., N slot subframe,μ -1} within a subframe and in increasing order of n s,f μ ∈ {0,..., N slot frame,μ -1} within a radio frame. One slot is composed of N symb slot consecutive OFDM symbols, where N symb slot is determined by the CP. In a subframe, the start of slot n s μ is at OFDM symbol n s μ N symb slotis aligned in time with the start. Not all terminals can transmit and receive simultaneously, which means that not all OFDM symbols in a downlink slot or an uplink slot can be used.

[0079] Table 3 shows the number of OFDM symbols per slot (N symb slot ), the number of slots per radio frame (N slot frame,μ ), and the number of slots per subframe (N slot subframe,μ ). Table 4 shows the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.

[0080]

Table 3

[0081]

Table 4

[0082] Figure 2 shows an example when μ = 2 (SCS is 60 kHz). Referring to Table 3, one subframe can include 4 slots. The one subframe = {1, 2, 4} slots shown in Figure 2 is an example, and the number of slots that can be included in one subframe is defined as in Table 3 or Table 4. Also, a mini-slot can include 2, 4, or 7 symbols, or more or fewer symbols.

[0083] In relation to physical resources in the NR system, an antenna port, a resource grid, a resource element, a resource block, a carrier part, etc. may be considered. Hereinafter, the physical resources that can be considered in the NR system will be specifically described.

[0084] First, in relation to the antenna port, the antenna port is defined such that the channel through which the symbols on the antenna port are carried can be inferred from the channels through which other symbols on the same antenna port are carried. When the large-scale properties of the channel through which the symbols on one antenna port are carried can be analogized from the channels through which the symbols on other antenna ports are carried, it can be said that the two antenna ports are in a QC / QCL (quasi co-located or quasi co-location) relationship. Here, the large-scale properties include any one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0085] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure is applicable.

[0086] TIFF2025089347000006.tif116170

[0087] Point A serves as a common reference point for the resource block grid and is obtained as follows.

[0088] - The offsetToPointA for the primary cell (PCell) downlink indicates the frequency offset between the lowest sub-carrier of the lowest resource block that overlaps with the SS / PBCH block used by the terminal for initial cell selection and point A. It is expressed in units of resource blocks assuming a 15 kHz sub-carrier spacing for FR1 and a 60 kHz sub-carrier spacing for FR2.

[0089] - absoluteFrequencyPointA indicates the frequency-position of point A expressed as in the absolute radio-frequency channel number (ARFCN).

[0090] Common resource blocks are numbered upward from 0 in the frequency domain for the sub-carrier spacing setting μ. The center of sub-carrier 0 of common resource block 0 for the sub-carrier spacing setting μ coincides with 'point A'. The relationship between the common resource block number n in the frequency domain CRB μ and the resource element (k, l) for the sub-carrier spacing setting μ is given as in Equation 1 below.

[0091]

Equation

[0092] In Equation 1, k is defined relative to point A such that k = 0 corresponds to the sub-carrier centered at point A. Physical resource blocks are numbered from 0 to N BWP,i size,μ -1 within the bandwidth part (BWP), and i is the number of the BWP. The relationship between the physical resource block n in BWP i PRB and the common resource block n CRB is given by Equation 2 below.

[0093]

Number

[0094] N BWP,i start,μ is a common resource block where the BWP starts relative to the common resource block 0.

[0095] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure is applicable. And FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure is applicable.

[0096] Referring to FIGS. 4 and 5, a slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one slot includes 7 symbols, while in the case of extended CP, one slot includes 6 symbols.

[0097] A carrier wave includes a plurality of subcarriers in the frequency domain. An RB (Resource Block) is defined as a plurality (e.g., 12) of consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined as a plurality of consecutive (physical) resource blocks in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier wave can include up to N (e.g., 5) BWPs. Data communication is performed on the activated BWP, and only one BWP may be activated for one terminal. Each element in the resource grid is called a resource element (RE:Resource Element), and one complex symbol may be mapped.

[0098] The NR system may support up to 400 MHz per component carrier (CC). If a terminal operating in such a wideband CC always operates with the radio frequency (RF) chip turned on for the entire CC, the terminal battery consumption may increase. Alternatively, considering various use cases operating within one wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different numerologies (e.g., subcarrier spacing, etc.) may be supported for different frequency bands within the CC. Alternatively, the capabilities of terminals may vary with respect to the maximum bandwidth. Considering this, the base station may instruct the terminal to operate only on a partial bandwidth rather than the entire bandwidth of the wideband CC, and for convenience, the partial bandwidth is defined as the bandwidth part (BWP). The BWP may be composed of consecutive resource blocks (RBs) on the frequency axis and may correspond to one numerology (e.g., subcarrier spacing, cyclic prefix (CP) length, slot / minislot duration).

[0099] On one hand, the base station can configure multiple BWPs even within one CC configured for a terminal. For example, in a PDCCH monitoring slot, a BWP that occupies a relatively small frequency region can be configured, and the PDSCH indicated by the PDCCH may be scheduled on a larger BWP than that. Alternatively, when UEs concentrate on a specific BWP, other BWPs may be configured for some terminals for load balancing. Alternatively, considering frequency domain inter-cell interference cancellation between adjacent cells, etc., a part of the spectrum of the entire bandwidth can be excluded, and both BWPs can be configured even within the same slot. That is, the base station can configure at least one DL / UL BWP for a terminal associated with a wideband CC. The base station can activate at least one of the DL / UL BWPs configured at a specific time (by means of L1 signaling or MAC CE (Control Element) or RRC signaling, etc.). Also, the base station can instruct switching to other configured DL / UL BWPs (by means of L1 signaling or MAC CE or RRC signaling, etc.). Or, when the timer value expires based on a timer, it may switch to a defined DL / UL BWP. At this time, the activated DL / UL BWP is defined as the active DL / UL BWP. However, during the initial access process of the terminal or in situations such as before the RRC connection is set up, the terminal may not be able to receive the configuration for the DL / UL BWP. Therefore, the DL / UL BWP assumed by the terminal in such a situation is defined as the initial active DL / UL BWP.

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

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

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

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

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

[0105] After performing the procedures as described above, the terminal can then perform PDCCH / PDSCH reception (S607) and physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) transmission (S608) as general uplink / downlink signal transmission procedures. In particular, the terminal receives downlink control information (DCI) on the PDCCH. Here, the DCI includes control information such as resource allocation information for the terminal, and the formats are different from each other depending on the purpose of use.

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

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

[0108]

Table 5

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

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

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

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

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

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

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

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

[0117] Slot aggregation

[0118] In Release-15 NR, for PDSCH (Physical downlink shared channel) and PUSCH (Physical uplink shared channel) transmissions that can carry data and control information, a method of increasing reliability by repeatedly transmitting one TB (transport block) in one layer over a plurality of consecutive slots has been standardized. Here, the number of repetitions for downlink data (e.g., the upper layer parameter aggregationFactorDL) and the number of repetitions for uplink data (e.g., the upper layer parameter aggregationFactorUL) may each have one value from {2, 4, 8}. That is, the same data may be transmitted in 2 consecutive slots, 4 consecutive slots, or 8 consecutive slots.

[0119] When the UE sets aggregationFactorDL > 1, the same symbol allocation is applied over aggregationFactorDL consecutive slots. The UE expects that the TB is repeated within each symbol allocation in each of the aggregationFactorDL consecutive slots, and the PDSCH is restricted to a single transmission layer. The redundancy version applied at the n-th transmission occasion of the TB is determined by Table 6 below.

[0120] Table 6 illustrates the redundancy versions applied when aggregationFactorDL > 1.

[0121]

Table 6

[0122] When the UE sets aggregationFactorUL > 1, the same symbol allocation is applied over aggregationFactorUL consecutive slots, and the PUSCH is restricted to a single transmission layer. The UE repeats the TB over aggregationFactorUL consecutive slots while applying the same symbol allocation to each slot. The redundancy version applied at the n-th transmission occasion of the TB is determined by Table 7 below. Table 7 illustrates the redundancy versions when aggregationFactorUL > 1.

[0123]

Table 7

[0124] Also, in NR, for the PUCCH (physical uplink control channel), which is a channel for carrying uplink control information (UCI), the same UCI may be repeatedly transmitted over a plurality of consecutive slots (where available UL resources exist). As described above, a multi-slot PUSCH in which repeated transmission for a TB is performed and a multi-slot PUCCH in which repeated transmission for UCI is performed may be configured / indicated. In this case, when repeatedly transmitting to consecutive slots where available UL resources exist, a collision (transmission is indicated in the same symbol / slot.) may occur between the PUSCH / PUCCH resources and other PUCCH resources or between PUSCH resources. In this case, an operation is defined in which the TB / UCI is not transmitted in the slot, or the TB / UCI is piggybacked (or multiplexed) to the collided resource and transmitted.

[0125] Describe the PUCCH repetition procedure.

[0126] In the case of PUCCH format 1, 3, or 4, the UE may have the number of slots (N PUCCH repeat ) for PUCCH transmission set by the upper layer parameter nrofSlots.

[0127] N PUCCH repeat > 1,

[0128] i) The UE repeats PUCCH transmission for UCI over N PUCCH repeat slots.

[0129] ii) As provided by the upper layer parameter (nrofSymbols in PUCCH-format1, nrofSymbols in PUCCH-format3, or nrofSymbols in PUCCH-format4), N PUCCHrepeat In each of the N slots, the PUCCH transmission has the same number of consecutive symbols.

[0130] iii) As provided by the higher layer parameter (startingSymbolIndex in PUCCH - format1, startingSymbolIndex in PUCCH - format3, or startingSymbolIndex in PUCCH - format4), N PUCCH repeat In each of the N slots, the PUCCH transmission has the same first symbol.

[0131] iv) Whether the UE performs frequency hopping for PUCCH transmission in different slots is set by the higher layer parameter interslotFrequencyHopping.

[0132] iv - 1) When the UE is set to perform frequency hopping for PUCCH transmission across different slots,

[0133] the UE performs frequency hopping slot - by - slot.

[0134] And the UE transmits the PUCCH starting from the first PRB provided by the higher layer parameter startingPRB within the even - numbered slots, and transmits the PUCCH starting from the second PRB provided by the higher layer parameter secondHopPRB within the odd - numbered slots. The slot indicated for the UE's first PUCCH transmission has number 0, and each subsequent slot is counted regardless of whether the UE transmits the PUCCH within that slot until the UE transmits the PUCCH within N PUCCH repeat slots.

[0135] And it is not expected that the UE is set to perform frequency hopping for PUCCH transmission within one slot.

[0136] iv-2) If the UE is not configured to perform frequency hopping for PUCCH transmission across different slots and is configured to perform frequency hopping for PUCCH transmission within one slot, the frequency hopping pattern between the first PRB and the second PRB is applied identically within each slot.

[0137] If the UE determines that, for PUCCH transmission within one slot, the number of symbols available for PUCCH transmission is less than the value provided by the upper layer parameter nrofSymbols for the PUCCH format, the UE does not transmit PUCCH within the slot.

[0138] When the UE receives the upper layer parameter TDD-UL-DL-ConfigurationCommon or further receives the upper layer parameter TDD-UL-DL-ConfigDedicated, the UE determines N PUCCH repeat number of slots for PUCCH transmission having the following symbols starting from one slot indicated to the UE.

[0139] - The first symbol, which is a UL symbol or a flexible symbol provided by the upper layer parameter startingSymbolIndex within PUCCH-format1, or PUCCH-format3, or PUCCH-format4, and

[0140] - Starting from the first symbol, consecutive UL symbols or flexible symbols that are equal to or greater than the number of symbols provided by the upper layer parameter nrofsymbols within PUCCH-format1, or PUCCH-format3, or PUCCH-format4

[0141] If the upper layer parameter TDD-UL-DL-ConfigurationCommon is not provided to the UE, the UE determines N consecutive slots starting from one slot indicated to the UE as the N slots for PUCCH transmission. PUCCH repeat As N consecutive slots for PUCCH transmission. PUCCH repeat If the UE transmits PUCCH over the first number of slots where N > 1, and the UE transmits PUSCH over the first number of slots, and the PUCCH transmission overlaps with the PUSCH transmission in one or more slots, and the conditions for UCI multiplexing in the PUSCH within the overlapping slots are met, the UE transmits PUCCH and does not transmit PUSCH within the overlapping slots.

[0142] The UE does not multiplex different UCI types within PUCCH transmissions repeated over N > 1 slots. PUCCH repeat If the UE transmits the first PUCCH over the first number of slots where N > 1, and the UE transmits the second PUCCH over the second number of slots where N > 1, and the first PUCCH transmission and the second PUCCH transmission overlap in the third number of slots, for the third number of slots, in the UCI type priority of HARQ-ACK > SR > high-priority CSI > low-priority CSI,

[0143] The UE does not expect the first PUCCH and the second PUCCH to start from the same slot and include UCI types with the same priority. PUCCH repeat The UE does not multiplex different UCI types within PUCCH transmissions repeated over N > 1 slots.

[0144] If the UE transmits the first PUCCH over the first number of slots where N > 1, and the UE transmits the second PUCCH over the second number of slots where N > 1, and the first PUCCH transmission and the second PUCCH transmission overlap in the third number of slots, for the third number of slots, in the UCI type priority of HARQ-ACK > SR > high-priority CSI > low-priority CSI, PUCCH repeat,1 The UE does not expect the first PUCCH and the second PUCCH to start from the same slot and include UCI types with the same priority. PUCCH repeat,2 The UE does not expect the first PUCCH and the second PUCCH to start from the same slot and include UCI types with the same priority.

[0145] - The UE does not expect the first PUCCH and the second PUCCH to start from the same slot and include UCI types with the same priority.

[0146] - If the first PUCCH and the second PUCCH include UCI types with the same priority, the UE transmits the PUCCH starting from an earlier slot and does not transmit the PUCCH starting from a later slot.

[0147] - If the first PUCCH and the second PUCCH do not include UCI types with the same priority, the UE transmits the PUCCH including the UCI type with a higher priority and does not transmit the PUCCH including the UCI type with a lower priority.

[0148] If the UE transmits PUCCH over N PUCCH repeat slots and, due to overlapping with another PUCCH transmission within the slot, the UE does not transmit the PUCCH within one slot out of the N PUCCH repeat slots, the UE counts that slot within the number of N PUCCH repeat slots.

[0149] Example I

[0150] In the support of URLLC (ultra reliable low latency communication) services, ensuring reliability is a particularly important issue in relation to the radio channel state. The requirements for the radio interval with respect to reliability are generally defined as the probability of transmitting a packet of y bytes within x msec must be z% or more (for example, x = 1, y = 100, z = 99.999). The biggest difficulty in meeting such requirements is that the radio channel quality itself deteriorates too much, and there may be a case where the capacity of the channel from the beginning cannot meet the above conditions. In such an environment, the present disclosure attempts to solve the problem by obtaining cell / base station diversity. That is, by having a number of cells / base stations / RPs (reception points) receive the same data, the terminal can transmit information to other cells / base stations / RPs with relatively good channel conditions even if the radio channel for a specific cell / base station / RP deteriorates significantly, thereby attempting to meet the reliability requirements.

[0151] The method proposed in the present disclosure is as follows.

[0152] Proposed (cell cycling uplink transmission): In uplink transmission, the terminal alternately transmits data to a plurality of cells / base stations / RPs in a predefined order. In the continuous transmission, the uplink grant is signaled to the terminal only once.

[0153] When applying this method, various methods can be considered when constructing the signals transmitted for each cell / base station / RP. Most simply, a method of repeatedly transmitting the same signal to each cell / base station / RP can be considered. That is, signals obtained by applying the same channel coding from the same information bits can be sequentially and repeatedly transmitted to each cell / base station / RP. Alternatively, after encoding from one information bit at a lower coding rate in proportion to the number of participating cells / base stations / RPs, the encoded bits can be divided and transmitted to each cell / base station / RP. The organization of such a method is as follows.

[0154] Method 1 (Extended Channel Coding): Different parity bits of the encoded codewords are transmitted to different cells / base stations / RPs, and channel coding is applied so that they can be decoded by one decoder.

[0155] - Information bit repetition channel coding is a method in which the information bits in the transport block (TB) transmitted to different cells / base stations / RPs are set to be the same, and the parity bits are set to be different. By specifying in advance the parity bits used during encoding, it is possible to prevent the parity bits of different cells / base stations / RPs from overlapping (this is similar if the TB transmitted to each cell / base station / RP is regarded as a retransmission of IR-HARQ (Incremental Redundancy Hybrid ARQ)). As an example, when there are N cells / base stations / RPs, the parity bits generated during encoding are divided into N groups, and only the parity bits within the group are used in the signals sent to each cell / base station / RP. The device that receives the said signal knows the parity group information transmitted to each cell / base station / RP, and can perform decoding by aligning the parity bits in the TB received at each cell / base station / RP by group.

[0156] - Non - iterative channel coding for information bits groups TBs that are transmitted to different cells / base stations / RPs into one group TB, and perform channel coding according to the group TB size. This method has the advantage that the channel coding gain is the largest, and the disadvantage that decoding is possible only after all cells / base stations / RPs receive the TBs.

[0157] Method 2 (Individual Channel Coding)

[0158] - The iterative - based LLR (log likelihood ratio) combining method applies TBs of the same size to different cells / base stations / RPs and repeatedly transmits the same TB. The device that receives the signal independently performs the process before decoding to obtain the LLR (log likelihood ratio) value. The calculated LLR values can be summed up and used as the input value for one decoder.

[0159] - Hard value combining applies TBs of the same size to different cells / base stations / RPs and repeatedly transmits the same TB. Also, it independently decodes the TBs received at different cells / base stations / RPs, and if decoding is successful for at least one of the TBs of each cell / base station / RP, it determines that the signal reception is successful.

[0160] Proposal I - 1 (Cross - cell Scheduling): The network schedules the scheduling information for a plurality of consecutive subframes only once in the first subframe, and the terminal transmits to a plurality of cells / base stations / RPs in the uplink transmission in the plurality of consecutive subframes.

[0161] In the application of Proposal I-1, information regarding the presence or absence of uplink scheduling for a plurality of consecutive subframes may be signaled in advance in a Layer 2 / 3 message, or transmitted to the terminal in a Layer 1 message together with uplink scheduling information. Alternatively, if the terminal already knows in advance that it is to transmit URLLC information, this information may be omitted. Alternatively, when the terminal makes a scheduling request to the base station, the terminal may also transmit it together with uplink scheduling request information.

[0162] In the application of Proposal I-1, after receiving a UL grant in a specific subframe, the terminal does not have to perform an action (e.g., blind decoding) to search for a UL grant in the subsequent N consecutive subframes.

[0163] Figures 7 and 8 show an example of iterative transmission of an uplink channel according to an embodiment of the present disclosure.

[0164] Figure 7 shows an example in which the resources scheduled in the first subframe persist in a plurality of consecutive subframes, and Figure 8 shows an example in which the resources scheduled in the first subframe are hopped according to a predetermined rule in a plurality of consecutive subframes.

[0165] When resource hopping is performed, there is an advantage that the frequency diversity gain can be further obtained in a situation where channel quality measurement for multiple cells is not sufficiently performed. If both the case where resource hopping is performed and the case where it is not performed are supported, signaling regarding whether or not hopping is performed may be instructed to the terminal as physical layer or Layer 2 / 3 information. In this embodiment, a TDD (Time Division Duplexing) mode is assumed, but also in the case of FDD (Frequency Division Duplexing), the downlink control channel (DL control channel) and the uplink data channel (UL data channel) are allocated to different frequency bands and may be applied identically.

[0166] In the previous Proposal I-1, the basic unit for switching transmission to a cell / base station / RP was a subframe, but it is not limited to this. As an example, a scheme of switching transmission in units of a plurality of symbol groups is also possible.

[0167] FIG. 9 shows an example of iterative transmission of an uplink channel according to an embodiment of the present disclosure.

[0168] FIG. 9 shows a scheme in which a plurality of RPs receive alternately in units of three symbols each. In this embodiment, a configuration in which both DL and UL symbols exist within one subframe is assumed.

[0169] In this specification, for convenience of description, the unit time (for example, subframe, N symbols) in which each cell / base station / RP transmits alternately for each base station is referred to as a time unit (TU: time unit).

[0170] Proposal I-2 (UL demodulation reference signal): The terminal transmits at least one uplink demodulation reference signal per TU.

[0171] This proposal is necessary because the receiving cell / base station / RP varies for each TU.

[0172] Proposal I-3 (DL control signaling for instructing the sequence of the RP): The network signals one or more of the following information to the terminal for multiple cells / base stations / RPs participating in uplink data reception.

[0173] i) Cell / base station / RP ID (identifier) information received for each TU

[0174] ii) Physical resource position and / or sequence information of the reference signal used by the cell / base station / RP received for each TU

[0175] Since the reference signals transmitted to each TU are received by different cells / RPs, physical resource positions (time / frequency) and / or sequences corresponding to different cell / RP IDs can be used. Therefore, in order for the terminal to transmit the reference signal, the above information needs to be signaled. As an example, as in i), the participating cell / RP ID may be directly transmitted. Alternatively, as in ii), the scrambling ID for the reference signal may be transmitted. In this case, the network uses layer 1 or layer 2 / 3 control messages to notify the terminal of the set information of the scrambling IDs of the continuously used reference signals.

[0176] When applying the above proposal, for the first TU, for the cell / RP (e.g., serving cell) that gives the UL grant, since the specified cell / RP ID and the scrambling ID for the reference signal may be used, except for the information regarding the first TU, only the information regarding the subsequent reference signals may be signaled.

[0177] Proposal I-4 (Timing advance for cell cycling): A terminal that transmits consecutive TUs applies different timing advance values for each TU. In such a process, symbols may be muted at TU boundary points.

[0178] Exemplification 1: When the terminal transmits N consecutive TUs, after muting the last symbol of the 1st TU to the (N - 1)th TU or the first symbol of the 2nd TU to the Nth TU, independent timing advance values can be applied for each TU.

[0179] Exemplification 2: Symbol muting may be performed only when the difference in timing advance values in Exemplification 1 satisfies a specific condition. For example, muting may be performed only when the timing advance value of a subsequent TU is larger than the timing advance value of the previous TU.

[0180] This proposed content is proposed considering that when a terminal transmits signals to base stations located at physically different distances from each other, the uplink time synchronization may be different for each TU.

[0181] The muting operation may be interpreted in various ways, such as omission of transmission for a specific physical signal or channel, or puncturing or rate matching operations for resource elements (REs) corresponding to the symbol in a specific physical channel.

[0182] FIG. 10 illustrates a method of applying timing advance in uplink iterative transmission according to an embodiment of the present disclosure.

[0183] FIG. 10 shows an example in which transmission of the first symbol of the TU is omitted. In this example, since the timing advance (TA) value at the second TU is larger than the TA value at the first TU, the first symbol of the second TU cannot be transmitted and is muted. If the TA value at the second TU is smaller than the TA value at the first TU, it is not necessary to deliberately mute as in the above example 2.

[0184] Proposal I-5 (Uplink Synchronization)

[0185] Method 1: The network transmits a list of base stations / cells / RPs that may perform continuous transmission to the terminal in a layer 2 / 3 message. The terminal that receives the message transmits uplink signals (e.g., PRACH, UL reference signal) to each base station / cell / RP in preparation for performing continuous transmission to the base stations / cells / RPs included in the list, and receives in advance setting values (e.g., timing advance value) for obtaining uplink time synchronization.

[0186] Method 2: A plurality of base stations / cells / RPs receive a specific uplink signal (e.g., PRACH, UL reference signal) of the terminal, and signal the terminal with setting values (e.g., timing advance value) for obtaining respective uplink time synchronization.

[0187] The above Method 1 is a method in which, after the terminal connects to a specific base station / cell / RP (e.g., serving cell), the terminal transmits uplink signals to each of them so as to be able to obtain uplink synchronization setting values for further base stations / cells / RPs from the base station / cell / RP, and receives the setting values.

[0188] Method 2 is a method in which when the terminal transmits a specific uplink signal (e.g., PRACH), a plurality of base stations / cells / RPs that receive data cyclically receive the signal together, and signal a plurality of uplink synchronization setting values at each or a representative base station / cell (e.g., serving cell).

[0189] The technology of the present disclosure assumes transmissions to physically separated and different base stations / cells / RPs, but is not limited thereto. The technology of the present disclosure can be applied to the method of the present disclosure when operating multiple frequency bands (carriers) with a base station implemented at the same physical location, by operating each frequency band as an independent logical cell. That is, this technology can be extended to a technology of cyclically transmitting in a promised order with different carriers to obtain a frequency diversity gain, and similarly, it can also be extended to different carriers of different base stations / cells / RPs. Further, it is also applicable when applying a plurality of different reception beams at the same base station / cell / RP to receive (signals including the same data).

[0190] Example II

[0191] In the present disclosure, ' / ' means 'and' or 'or' depending on the context. In the present disclosure, the idea is mainly described based on PUSCH, but it is not limited thereto, and the same / similar method can also be applied to PUCCH composed of a plurality of TUs (time units). Further, hereinafter, the proposed method will be described based on the case of transmitting PUSCH in consecutive slots by DCI, but when transmitting PUSCH in consecutive slots at specific intervals (for example, semi-persistent PUSCH) or when (for URLLC purposes or voice service purposes), after semi-statically assigning UL resources capable of PUSCH transmission to the terminal, when the terminal transmits PUSCH with the said resources when necessary (for example, grant-free PUSCH), it is also applicable when transmitting the said PUSCH in a plurality of consecutive slots. The said 'consecutive slots' may be consecutive slots satisfying specific conditions. For example, in TDD, consecutive slots may be counted excluding DL slots (and flexible slots where the number of UL symbols is below a specific value).

[0192] In the above proposed content, one data packet composed of specific units (for example, a transport block, a code block group) is repeatedly transmitted over a plurality of TUs (time units). However, for each TU or TU group, by making the receiving sources (for example, RP, beam, panel) different, in addition to time diversity and combining diversity by repeated transmission, the receiving source also changes for each TU (group), and it is proposed that the TA value of the terminal can change for each TU (group). In the following, when the terminal beamforms a transmission signal, a method for indicating / mapping the spatial relation with respect to the terminal transmission beam in units of TU (group) will be proposed. Here, each transmission beam can be received by different base stations / TRPs / panels / beams, but is not limited thereto. Depending on the implementation of the base station, each transmission beam can also be simultaneously received by a plurality of base stations / TRPs / panels / beams or a plurality of terminal transmission beams can be received by one wide receiving beam. In particular, in the present disclosure, a method or rule for mapping a plurality of spatial relations RS (spatial relation RS) and TUs according to the total number N of continuously allocated TUs and the total number M of spatial relations RS is proposed. For the convenience of explanation, hereinafter, it is assumed that TU = slot (group) in the present disclosure, but it is not limited thereto, and it is obvious that the technology of the present disclosure is also applicable when TU is configured at the symbol (group) level.Also, currently in the NR standard, the spatial relation RS for SRS (sounding reference signal) or PUSCH can be defined to indicate one of SRI (SRS resource indicator), CRI (CSI-RS resource indicator), and SSBRI (SS / PBCH Resource Block Indicator). The spatial relation RS for PUSCH is configured to indicate the SRI (for UL transmission based on a codebook or non-codebook). Here, in the case of codebook-based UL in Rel-15, one SRI can be indicated by DCI format 0-1. In the case of non-codebook-based UL, the number of SRIs equal to the number of transmission layers can be indicated by DCI format 0-1. Even in the case of codebook-based UL in Rel-16, it is currently under discussion whether to allow multiple SRI indications for multi-panel / beam simultaneous transmission. In the following description, for the sake of applicability to PUCCH in addition to PUSCH, the term "spatial relation RS" is used instead of SRI. For convenience, the main examples are based on codebook-based UL. In the case of non-codebook-based UL transmission, in most of the following proposed methods, 'one SRI' can be applied by replacing it with 'the number of SRIs equal to the number of layers'.

[0193] When applying the technology of the present disclosure, typical information exchange and operations between a base station and a terminal are as follows.

[0194] 1) The base station configures / indicates to the terminal the slot group configuration for multi-slot PUSCH and the spatial relation RS information (i.e., transmission beam information) applied for each slot group.

[0195] The information may be composed of various detailed information, and each piece of detailed information may be transmitted to the terminal step by step in different messages. For example, the presence or absence of a multi-slot configuration and slot grouping information may be in an RRC message, and the spatial-related RS information may be transmitted in a MAC-CE or DCI.

[0196] The base station triggers (e.g., with DCI) / activates (e.g., with DCI or MAC CE) multi-slot PUSCH transmission.

[0197] At this time, (a part of) the spatial-related RS information applied for each slot group may be transmitted together.

[0198] If this technology is applied to a multi-slot PUCCH or a grant-free PUSCH, the above triggering / activation process may be omitted.

[0199] 2) The terminal receives from the base station the slot group configuration for the multi-slot PUSCH and the spatial-related RS information (i.e., transmission beam information) applied for each slot group.

[0200] The information may be composed of various detailed information, and each piece of detailed information may be transmitted to the terminal step by step by different messages. For example, the presence or absence of a multi-slot configuration and slot grouping information may be in an RRC message, and the spatial-related RS information may be transmitted in a MAC-CE or DCI.

[0201] The terminal receives a multi-slot PUSCH transmission trigger (e.g., with DCI) / activation (e.g., with DCI or MAC CE) message.

[0202] At this time, (a part of) the spatial-related RS information applied for each slot group may be received together.

[0203] If the present technology is applied to multiplexed slot PUCCH or grant-free PUSCH, the above triggering / activation process may be omitted.

[0204] For each slot group of the multiplexed slot PUSCH, the terminal determines the PUSCH transmission beam (spatial domain filter) to be applied to the slot group from the spatially related RSs indicated / set for each slot group, and uses it to transmit PUSCH in the slot group.

[0205] The method for determining the PUSCH transmission beam (spatial domain filter) to be applied to the slot group from the spatially related RSs is as follows.

[0206] For example, when the spatially related RS is a UL RS (e.g., SRS), the beam that transmitted the UL RS can be set as the PUSCH transmission beam.

[0207] Also, when the spatially related RS is a DL RS (e.g., CSI-RS, SSB), the transmission beam corresponding to the DL RS reception beam can be set as the PUSCH transmission beam.

[0208] Here, the “transmission beam corresponding to the reception beam” can be configured with the same spatial domain filter as the reception beam as the transmission beam in the case of a general terminal implementation. However, after independently establishing the correspondence relationship between the transmission beam and the reception beam according to the terminal implementation, the (optimal) transmission beam corresponding to the (optimal) reception beam for the DL RS can also be used.

[0209] 3rd stage: For each slot group constituting the multi-slot PUSCH, the base station receives the PUSCH (and DMRS) using the TRP / panel / beam that has received the space-related RS set / indicated for the slot group or is determined to be suitable for receiving the space-related RS (it is also possible to receive each slot group simultaneously with multiple TRP / panels / beams).

[0210] The operation of the 3rd stage may vary depending on the implementation of the base station.

[0211] When applying the present disclosure, the terminal transmits signals (including the same information) with different transmission beams for each slot (group) (repeatedly), so that even when the link quality between a specific transmission beam and the base station deteriorates due to ray / beam blockage, UE rotation, UE mobility, etc., the link quality between the base station and other transmission beams does not deteriorate significantly, and the communication success probability can be increased.

[0212] Proposal II-1 (Base station operation): The base station that sets / indicates the PUSCH of N slots to the terminal can divide the N slots into K slot groups and separately indicate the space-related RS applied by the terminal for each slot group.

[0213] In the above Proposal II-1, even in the case of codebook-based UL transmission (depending on terminal capabilities), a plurality of spatial relation RSs may be indicated for each slot group. For example, if the terminal is equipped with a plurality of transmission panels and can transmit one (or more) beam per panel, or if the terminal can simultaneously transmit a plurality of beams with a single panel, two or more transmission beams may be applied for each slot group. For example, if the base station instructs the terminal that the spatial relation RS to be applied in slot group #0 is {SRI#0, SRI#1}, and the spatial relation RS to be applied in slot group #1 is {SRI#2, SRI#3}, the terminal can use both the beam used when transmitting SRI#0 and the beam used when transmitting SRI#1 in slot group #0, and can use both the beam used when transmitting SRI#2 and the beam used when transmitting SRI#3 in slot group #1. Here, the spatial relation RS indicated for each slot group can be applied to a specific layer group or to all layers. As an example of layer group-based transmission, as in the above example, rank 4 transmission is indicated for the spatial relation RS = {SRI#0, SRI#1} applied in slot group #0, and the layer group information is indicated as the first layer group = {the first layer and the second layer}, the second layer group = {the third layer and the fourth layer}, then the terminal uses the beam used when transmitting SRI#0 for the transmission of the first layer group of the slot group, and uses the beam used when transmitting SRI#1 for the transmission of the second layer group of the slot group. Or it can also be applied to the same layer group. This applies to the case of simultaneously transmitting the same signal with a plurality of beams. That is, as in the above example, when rank = 4 is indicated, the terminal transmits all 4 layers with the beam used when transmitting SRI#0 (via a specific panel / antenna group / RF chain), and at the same time transmits with the beam used when transmitting SRI#1 (via another panel / antenna group / RF chain).The base station can also set which of the two transmission modes (layer group unit transmission, overlapping transmission in the entire layer) to apply to the terminal.

[0214] When performing codebook-based UL (CB (codebook) based UL) transmission, one or multiple spatial relation RSs as described may be indicated for one slot group. At this time, each spatial relation RS indicator (e.g., SRI) may be indicated together with a separate TPMI (transmit precoding matrix indicator) and TRI (transmit rank indicator). That is, the terminal sets an (analog) beam with the spatial relation RS information indicated during PUSCH transmission in the said slot group, and constructs a precoding matrix for the corresponding PUSCH transmission with the TPMI and TRI information mapped to the said spatial relation RS. When multiple spatial relation RS information is indicated for the same slot group for CB based UL transmission, whether TPMI and TRI are indicated for each spatial relation RS respectively (e.g., indicating TPMI and TRI for each panel), or TPMI is indicated separately for each spatial relation RS, but TRI is indicated with a common single value (e.g., when the indicated TRI = 2, and each panel transmits in 2 layers repeatedly, when the indicated TRI = 2 and it is a 2-panel UE, and each panel transmits 1 layer each), in this case, a prescribed value (e.g., TRI = 1, that is, 1 layer per panel) may be used for the TRI value. Or, one (master) TPMI / TRI may be indicated for multiple spatial relation RSs. For example, when 4-port SRI#0 and 4-port SRI#1 for (CB-based UL transmission) are respectively indicated as spatial relation RSs in a specific slot group, one TPMI / TRI may be indicated based on a combined 8Tx standard for the ports of both SRS resources. That is, the TPMI here is a matrix index selected and indicated from an 8-port codebook. Multiple slot transmission may be fixed with TRI = 1 for URLLC applications. In such a case, only TPMI is indicated, and the TPMI at that time is an index selected and indicated from a rank 1 codebook.

[0215] In the case of non-codebook-based UL (Non-CB based UL), SRI may be indicated by the number of total layers transmitted for each slot group. Here, since a part of the SRI may be transmitted with the same (analog) beam and the rest with other (analog) beams, the spatial relation RSs of the SRI constituting the SRI may be different from each other. For example, while indicating 4 SRIs for rank 4 transmission, 2 SRIs may have a spatial relation of CRI#0 and the remaining 2 SRIs may have a spatial relation of CRI#1. In this case, the terminal should have transmitted the first 2 SRIs with the same (analog) beam (and other digital beams or beams precoded differently from each other), and the remaining 2 SRIs with the same (analog) beam (and other digital beams or beams precoded differently from each other). Thereby, the first 2 layers and the remaining 2 layers of the PUSCH transmitted in the slot group may be transmitted with different beams. As yet another method, it may be indicated / set (depending on UE capabilities) to simultaneously transmit the same layer with multiple beams. This particularly means indicating multiple spatial relation RSs (e.g., SRI) for the same layer (or UL DMRS port). That is, in existing non-CB based transmission, when 1-port SRI is indicated by the number of transmission ranks, in this case, X-port SRI may be indicated by the number of transmission ranks, or SRI may be indicated by transmission rank × X. Here, X corresponds to the number of spatial relations or the number of beams for simultaneous transmission. In the former case, multiple ports included in one SRS resource are each reference signals capable of simultaneous transmission with different beams (via different panels / antenna groups / RF chains). As an example, the base station can indicate 8 SRIs to the terminal for rank 4 transmission. In this case, after mapping 2 SRIs to each layer (according to specific rules or base station settings), when transmitting each layer, the terminal can simultaneously transmit with the beams that transmitted the mapped 2 SRIs (via different panels / antenna groups / RF chains).

[0216] When setting SRS, SRS resources that can be transmitted simultaneously (transmitted from different panels) and SRS resources that cannot be transmitted simultaneously (transmitted from the same panel) may be separately set. For example, it can be said that SRS resources within the same SRS resource set cannot be transmitted simultaneously, and SRS resources belonging to different SRS resource sets can be transmitted simultaneously. That is, physically, SRS resources belonging to the SRS resource set are all transmitted from the same transmission panel (with different beams or the same beam). When X SRS resource sets are set, the terminal can generate beams on X transmission panels respectively to transmit SRS resources. In such a case, when a plurality of SRIs are indicated for each slot group, it is more preferable that the SRIs indicated within the same slot group each belong to different SRS resource sets. Here, SRIs indicated by different slot groups may be included in the same SRS resource set (since they are transmitted at different times).

[0217] As in Proposal II-1, when the base station desires to transmit to the terminal while changing the transmission beam for the multi-slot PUSCH on a per-slot-group basis, there is a disadvantage that the spatial relation RS information to be indicated increases. Therefore, below, a method for more efficiently indicating the spatial relation RS information to the terminal (for example, minimizing the increase in the DCI payload size) is proposed.

[0218] Proposal II-1-1: The spatial relation RS set information applied to K slot groups is defined as one spatial relation state. Then, after the base station sets a plurality of spatial relation states in the upper layer message (for example, RRC) to the terminal, one of the plurality of spatial relation states can be indicated in a lower layer message (for example, DCI or MAC-CE).

[0219] - The lower layer message may be a multi-slot triggering DCI (multi-slot PUSCH triggering DCI) or a semi-persistent multi-slot PUSCH activation DCI / MAC-CE (semi-persistent multi-slot PUSCH activation DCI / MAC-CE).

[0220] - Here, the size of the field indicating the spatial correlation state in the DCI may be determined by the number of spatial correlation states set in the upper layer message. For example, find the minimum natural number n value from 2^n that is greater than or equal to the total number of spatial correlation states. Here, the field may be composed of n bits.

[0221] The following are examples related to Proposal II-1-1.

[0222] - Example 1) When K = 4, two states may be set in the RRC, such as spatial correlation state #0 = {SRI#0, SRI#1, SRI#2, SRI#3} and spatial correlation state #1 = {SRI#0, SRI#1, SRI#0, SRI#1}. And one of the two states may be indicated by a 1-bit DCI. Here, the k-th element means the spatial correlation RS applied to the k-th slot group. k = 1, 2, 3, 4 (the same spatial correlation RS may be set / indicated for multiple slot groups).

[0223] - Example 2) When K = 2 and the terminal can transmit two beams simultaneously, two states may be set in the RRC, such as spatial correlation state #0 = {SRI#0, SRI#1, SRI#2, SRI#3} and spatial correlation state #1 = {SRI#0, SRI#1, SRI#0, SRI#1}. And one of the two states may be indicated by a 1-bit DCI. Here, the first and second elements mean the two spatial correlation RSs applied to the first slot group, and the third and fourth elements mean the two spatial correlation RSs applied to the second slot group.

[0224] - Example 3) Assume that K = 2, the terminal can simultaneously transmit X (= 2) beams, and two SRS resource sets that cannot be transmitted simultaneously (transmitted with different beams in the same panel) are set within one SRS resource set. That is, assume SRS resource set #0 = {SRI#0, SRI#1}, SRS resource set #1 = {SRI#2, SRI#3}, the resources within each set cannot be transmitted simultaneously, and SRS resources belonging to different sets can be transmitted simultaneously (because they are transmitted from different panels). In this case, four states such as spatial correlation state #0 = {the first SRI in the SRS resource set, the second SRI in the SRS resource set}, spatial correlation state #1 = {the second SRI in the SRS resource set, the first SRI in the SRS resource set}, spatial correlation state #2 = {the first SRI in the SRS resource set, the first SRI in the SRS resource set}, and spatial correlation state #3 = {the second SRI in the SRS resource set, the second SRI in the SRS resource set} may be set in RRC. And X (= 2) × 2 = 4-bit DCI may indicate X (= 2) states for each slot group. Here, the k-th element means the spatial correlation RS applied to the k-th slot group. k = 1, 2. For example, if the DCI indicates that the first spatial correlation state = #0 and the second spatial correlation state = #3, in the first slot group, {the first SRI in SRS resource set #0, the second SRI in SRS resource set #1}, that is, two beams transmitting SRI#0 (transmitted from the first panel) and SRI#3 (transmitted from the second panel) may be used to configure the PUSCH beam for transmitting the first slot group. And in the second slot group, {the second SRI in SRS resource set #0, the second SRI in SRS resource set #1}, that is, two beams transmitting SRI#1 (transmitted from the first panel) and SRI#3 (transmitted from the second panel) may be used to configure the PUSCH beam for transmitting the second slot group.

[0225] Hereinafter, a method of approaching in a manner different from the above-described Proposal II-1-1 to perform more efficient signaling is proposed.

[0226] Proposal II-1-2: The spatial relation RS information applied to each slot group may be separately indicated / set.

[0227] Method 1): The spatial relation RS for all slot groups may be pre-set in a higher layer message (e.g., RRC and / or MAC-CE). Then, in a multi-slot PUSCH scheduling triggering / activation message (e.g., DCI), the spatial relation RS indication may be omitted, or any (or a specific agreed-upon) spatial relation RS (e.g., SRI) (regardless of the actually applied spatial relation RS) may be indicated.

[0228] Method 2): For the remaining (K-D) spatial relation RS sets out of the K spatial relation RS sets, except for the D spatial relation RS sets applied to a specific slot group, they may be pre-set / indicated in a higher layer message. Then, in the multi-slot PUSCH scheduling DCI, the spatial relation RS set applied to the specific slot group may be indicated. (For example, D = 1)

[0229] Here, the'spatial relation RS set' means a set of one or more spatial relation RSs applied to a single-slot PUSCH transmission (e.g., a single SRI for a CB-based UL PUSCH (single panel) or an R SRI for a non-CB-based UL PUSCH (R transmission rank for PUSCH)).

[0230] For more efficient signaling in the above method, when the spatial-related RS set indication is omitted or a specific agreed spatial-related RS set value is indicated (e.g., SRI = 0) between the terminal and the base station for the scheduling DCI, or when using DCI format 0-0, a basic (default) spatial-related value may be agreed / stipulated for use.

[0231] As an example of the basic spatial relation, the same spatial relation as the PUCCH with the lowest ID and the same spatial domain filter used for transmitting the last PRACH may apply.

[0232] As an example of the specific slot group, it can be defined as the first transmitted slot group or the slot group corresponding to the lowest slot group index among the plurality of slot groups constituting the corresponding PUSCH.

[0233] Method 3) All K spatial-related RS sets may be indicated by the multi-slot PUSCH scheduling DCI.

[0234] In order to reduce the DCI overhead in the above method, some of the K spatial-related RS sets may be set / stipulated to apply the basic spatial relation proposed in Method 2. In this case, only the remaining spatial-related RS sets excluding the slot groups to which the basic spatial relation is applied among the K ones may be indicated by the DCI.

[0235] In order to reduce the DCI overhead in the above method, a (compact) spatial-related RS list used for the multi-slot PUSCH may be set by the upper layer signaling. And the payload size of the DCI for the spatial relation indication of each slot group may be set / stipulated according to the size of the list.

[0236] The spatial relation RS list for the multi-slot PUSCH may be set as a subset of the spatial relation RS list for a single slot PUSCH. For example, if a total of 4 SRS resources are set for codebook-based UL applications, and only 2 out of the 4 SRS resources are specified as the list, for a single slot PUSCH, 1 out of 4 SRIs is specified with 2-bit information, while for a multi-slot PUSCH, 1 out of 2 SRIs may be specified with 1-bit information for each slot group. Similarly, in the case of non-CB-based UL, for a multi-slot PUSCH, the DCI payload can be reduced by specifying the candidate SRS resource list separately.

[0237] In the application of the above method, the spatial relation RS list to be used may be set separately according to the number (K) of slot groups indicated by DCI or the total number (N) of slots constituting the PUSCH.

[0238] For example, in order to minimize the DCI payload by reducing the number of candidate spatial relation RSs for each slot group as K becomes larger, a list composed of a smaller number of spatial relation RSs may be set (e.g., 8 SRIs (3 bits) for K = 1, 4 SRIs (2 bits) for K = 2, 2 SRIs (1 bit) for K = 3)).

[0239] The above methods may be used together (or in combination). For example, if K or N is below a specific value, Method 3 is used, and if K or N is above the specific value, giving up dynamically indicating the spatial relation RS by DCI, Method 1 or 2 may be used.

[0240] When applying the above Proposal II-1, illustratively, the base station can have the following signal / operation flow.

[0241] Step 1: The base station can set / indicate the slot group configuration for the multi-slot PUSCH and the spatial relation RS information (i.e., transmission beam information) applied for each slot group.

[0242] The above information may be composed of a plurality of detailed information, and each detailed information may be transmitted to the terminal step by step by different messages. For example, the presence or absence of a multi-slot configuration and slot grouping information may be in an RRC message, and spatial-related RS information may be transmitted by a MAC-CE or DCI.

[0243] The base station triggers (e.g., by DCI) / activates (e.g., by DCI or MAC CE) multi-slot PUSCH transmission

[0244] At this time, (a part of) the spatial-related RS information applied for each slot group may be transmitted together.

[0245] If this technology is applied to a multi-slot PUCCH or a grant-free PUSCH, the above triggering / activation process may be omitted.

[0246] When the present disclosure is applied, by transmitting signals (including the same information) with different transmission beams for each slot (group) repeatedly, even when the link quality between a specific beam and the base station deteriorates due to ray / beam blockage, UE rotation, UE mobility, etc., the link quality between another beam and the same or another base station does not deteriorate significantly, and the communication success probability can be increased.

[0247] In the following, the terminal operation when applying the above proposed method is proposed. Each method and embodiment in the above Proposal II-1 respectively corresponds to each method and embodiment in the following Proposal II-2.

[0248] Proposal II-2: A terminal to which N-slot PUSCH is configured / instructed by the base station divides N slots into K slot groups, and can apply the spatial-related RS configured / instructed for each slot group.

[0249] In the above Proposal II-2, even in the case of codebook-based UL transmission (depending on terminal capabilities), a plurality of spatial relation RSs may be indicated for each slot group. For example, if the terminal is equipped with a plurality of transmission panels and can transmit one (or more) beam per panel, or if the terminal can transmit a plurality of beams simultaneously with a single panel, it may be instructed to apply two or more transmission beams for each slot group. In the case of non-CB-based UL, the number of SRIs corresponding to the total number of layers transmitted for each slot group may be indicated. Here, since some of the SRIs may be transmitted with the same (analog) beam and the rest with other (analog) beams, the spatial relation RSs of the SRIs constituting the SRI may be different from each other.

[0250] When the SRS is configured / indicated, the terminal can determine whether to transmit from the same transmission antenna group / panel depending on whether the SRS resource belongs to the same SRS resource set. For example, all SRS resources belonging to the SRS resource set are transmitted with the same transmission panel (with different beams or the same beam). When X SRS resource sets are configured, the terminal can generate beams with X transmission panels respectively to transmit the SRS resources. In such a case, it is more preferable that the SRIs indicated within the same slot group when a plurality of SRIs are indicated for each slot group belong to different SRS resource sets respectively. At this time, the SRIs indicated in different slot groups may be included in the same SRS resource set (since they are transmitted at different times).

[0251] As in Proposal II-1, when the base station desires to transmit to the terminal while changing the transmission beam for the multi-slot PUSCH in units of slot groups, there is a disadvantage that the spatial relation RS information to be indicated increases. As in Proposal II-1-1 / II-1-2, a more efficient indication method is proposed. In the following, when receiving the base station signaling applying the above Proposal II-1-1 / II-1-2 method, the operations of the terminal are proposed respectively.

[0252] Proposal II-2-1) After a plurality of spatial related states are set in a higher layer message (e.g., RRC), one of the plurality of spatial related states may be indicated by a lower layer message (e.g., DCI or MAC-CE). Also, a terminal to which a multi-slot PUSCH transmission resource is allocated (and transmission is indicated) divides the multi-slot into K slot groups, and determines / applies a spatial related RS set to be applied to each of the K slot groups according to the information specified in the finally indicated spatial related state, and determines and transmits a beam (spatial domain filter) for transmitting the slot group.

[0253] The lower layer message may be a multi-slot PUSCH triggering DCI or a semi-persistent multi-slot PUSCH activation DCI / MAC-CE.

[0254] At this time, the size of the field indicating the spatial related state in the DCI may be determined according to the number of spatial related states set in the higher layer message (e.g., search for the minimum natural number n value from 2^n that is greater than or equal to the total number of states, where the field may be composed of n bits).

[0255] An example of Proposal II-2-1 is as follows.

[0256] - Example 1) When K = 4, two states may be set in the RRC such as spatial related state #0 = {SRI#0, SRI#1, SRI#2, SRI#3} and spatial related state #1 = {SRI#0, SRI#1, SRI#0, SRI#1}. And one of the two states may be indicated by a 1-bit DCI. Here, the k-th element means the spatial related RS to be applied to the k-th slot group. k = 1, 2, 3, 4. (The same spatial related RS may be set / indicated for multiple slot groups.)

[0257] - Example 2) When K = 2 and the terminal can transmit two beams simultaneously, two states may be configured in RRC, such as spatial correlation state #0 = {SRI#0, SRI#1, SRI#2, SRI#3} and spatial correlation state #1 = {SRI#0, SRI#1, SRI#0, SRI#1}. Then, one of the two states may be indicated by 1-bit DCI. Here, the first and second elements mean two spatial correlation RSs applied to the first slot group, and the third and fourth elements mean two spatial correlation RSs applied to the second slot group.

[0258] - Example 3) Assume that K = 2, the terminal can transmit X (= 2) beams simultaneously, and two SRS resource sets that cannot be transmitted simultaneously (transmitted with different beams from the same panel) are configured within one SRS resource set.

[0259] That is, assume that for a terminal configured with SRS resource set #0 = {SRI#0, SRI#1} and SRS resource set #1 = {SRI#2, SRI#3}, SRI#0 and SRI#1 are transmitted from the same antenna group / panel / RF chain with the same beam or different beams, and similarly, SRI#2 and SRI#3 are transmitted from the same antenna group / panel / RF chain with the same beam or different beams. Assume that (SRI#0 or SRI#1) and (SRI#2 or SRI#3) are transmitted on different same antenna groups / panels / RF chains. In this case, four states such as spatial correlation state #0 = {the first SRI in the SRS resource set, the second SRI in the SRS resource set}, spatial correlation state #1 = {the second SRI in the SRS resource set, the first SRI in the SRS resource set}, spatial correlation state #2 = {the first SRI in the SRS resource set, the first SRI in the SRS resource set}, and spatial correlation state #3 = {the second SRI in the SRS resource set, the second SRI in the SRS resource set} may be configured in RRC. And with an X(=2)×2 = 4-bit DCI, X(=2) states may be indicated for each slot group. Here, the k-th element means the spatial correlation RS applied to the k-th slot group. k = 1, 2. For example, if the DCI indicates that the first spatial correlation state = #0 and the second spatial correlation state = #3, in the first slot group, {the first SRI in SRS resource set #0, the second SRI in SRS resource set #1}, that is, the PUSCH beam for transmitting the first slot group may be configured using two beams that transmit SRI#0 (transmitted from the first panel) and SRI#3 (transmitted from the second panel). And in the second slot group, {the second SRI in SRS resource set #0, the second SRI in SRS resource set #1}, that is, the PUSCH beam for transmitting the second slot group may be configured using two beams that transmit SRI#1 (transmitted from the first panel) and SRI#3 (transmitted from the second panel).

[0260] Proposal II-2-2: The spatial relation RS information applied to each slot group may be separately indicated / set.

[0261] Method 1): The spatial relation RS for all slot groups may be pre-set in a higher layer message (e.g., RRC and / or MAC-CE). Then, it is expected that the spatial relation RS indication is omitted in the multi-slot PUSCH scheduling triggering / activation message (e.g., DCI), or the spatial relation RS (e.g., SRI) indicated in the message can be ignored. That is, for example, the SRI value indicated by DCI can be ignored, and the spatial relation RS already set in the higher layer message can be applied.

[0262] Method 2): For the remaining (K-D) spatial relation RS sets among the K spatial relation RS sets, excluding the D spatial relation RS sets applied to a specific slot group, they may be pre-set / indicated in a higher layer message. Then, the spatial relation RS set applied to the specific slot group may be indicated by the multi-slot PUSCH scheduling DCI (e.g., D = 1).

[0263] Here, the'spatial relation RS set' means a set of one or more spatial relation RSs applied to a single-slot PUSCH transmission (e.g., a single SRI for CB-based UL PUSCH (single panel) or an R SRI for non-CB-based UL PUSCH (R transmission rank for PUSCH)).

[0264] For more efficient signaling in the above method, a basic (default) spatial relation value used when the spatial relation RS set indication is omitted in the scheduling DCI, or a specific agreed spatial relation RS set value is indicated (e.g., SRI = 0) or when DCI format 0-0 is used, may be agreed / stipulated between the terminal and the base station.

[0265] As an example related to the basic spatial relation, the same spatial relation as that of the PUCCH having the lowest ID and the same spatial domain filter used for transmitting the last PRACH may apply.

[0266] As an example of the specific slot group, the slot group that is transmitted first among the plurality of slot groups constituting the PUSCH or the slot group corresponding to the lowest slot group index may be defined.

[0267] In method 3), all K spatial relation RS sets may be indicated by a mult-slot PUSCH scheduling DCI.

[0268] In the above method, in order to reduce the DCI overhead, a part of the K spatial relation RS sets can be set / stipulated to apply the basic spatial relation proposed in method 2. In this case, only the remaining spatial relation RS sets excluding the slot groups to which the basic spatial relation is applied among the K ones may be indicated by the DCI.

[0269] In the above method, in order to reduce the DCI overhead, a (compact) spatial relation RS list used in the case of a mult-slot PUSCH may be set by upper layer signaling. And the payload size of the DCI for the spatial relation indication of each slot group may be set / stipulated according to the size of the list.

[0270] The spatial relation RS list for the multi-slot PUSCH may be set as a subset of the spatial relation RS list for the single-slot PUSCH. For example, if a total of 4 SRS resources are set for codebook-based UL applications, and only 2 out of the 4 SRS resources are specified as the list, for a single-slot PUSCH, 1 out of 4 SRIs is specified with 2-bit information, while for a multi-slot PUSCH, 1 out of 2 SRIs may be specified with 1-bit information for each slot group. Similarly, in the case of non-CB-based UL, for a multi-slot PUSCH, the DCI payload can be reduced by specifying a separate candidate SRS resource list.

[0271] In the application of the above method, the spatial relation RS list to be used may be separately set according to the number (K) of slot groups indicated by the DCI or the total number (N) of slots constituting the PUSCH.

[0272] For example, the larger the K, the fewer the number of spatial relation RSs may be used to form the list. For example, 8 SRIs (3 bits) for K = 1, 4 SRIs (2 bits) for K = 2, 2 SRIs (1 bit) for K = 3)

[0273] The above methods may be used together (or in combination). For example, if K or N is below a specific value, Method 3 is used; if K or N is above a specific value, the dynamic indication of the spatial relation RS by the DCI is abandoned, and Method 1 or 2 may be used.

[0274] When applying the above Proposal II-2, exemplarily, the terminal may have the following signal / operation flow.

[0275] 2nd stage) The terminal receives from the base station the slot group configuration for the multi-slot PUSCH and the spatial relation RS information (i.e., transmission beam information) applied for each slot group.

[0276] The above information may be composed of various detailed information, and each piece of detailed information may be transmitted to the terminal step by step with different messages. For example, the presence or absence of a multi-slot configuration and slot grouping information may be in an RRC message, and space-related RS information may be transmitted in a MAC-CE or DCI.

[0277] The terminal receives a multi-slot PUSCH transmission trigger (e.g., in DCI) / activation (e.g., in DCI or MAC CE) message.

[0278] At this time, (a part of) the space-related RS information applied for each slot group may be received together.

[0279] If this technology is applied to a multi-slot PUCCH or a grant-free PUSCH, the above triggering / activation process may be omitted.

[0280] The terminal determines a PUSCH transmission beam (spatial domain filter) applied to the corresponding slot group from the space-related RSs indicated / set for each slot group of the multi-slot PUSCH, and uses it to transmit PUSCH in the corresponding slot group.

[0281] The method for determining a PUSCH transmission beam (spatial domain filter) applied to the corresponding slot group from the space-related RS is as follows.

[0282] For example, when the space-related RS is a UL RS (e.g., SRS), the beam that transmitted the UL RS can be set as the PUSCH transmission beam.

[0283] Also, when the space-related RS is a DL RS (e.g., CSI-RS, SSB), the transmission beam corresponding to the DL RS reception beam can be set as the PUSCH transmission beam.

[0284] Here, the "transmission beam corresponding to the reception beam" can be configured with the same spatial domain filter as the reception beam in the case of a general terminal implementation. However, depending on the terminal implementation, after establishing a unique correspondence between the transmission beam and the reception beam, an (optimal) transmission beam corresponding to the (optimal) reception beam for the DL RS may be used.

[0285] When applying the present disclosure, by transmitting signals (including the same information) with different transmission beams for each slot (group) repeatedly, even when the link quality between a specific beam and the base station deteriorates due to ray / beam blockage, UE rotation, UE mobility, etc., the link quality between other beams and the (same or other) base station does not deteriorate significantly, and the communication success probability can be increased.

[0286] In the above Proposal II-1 / II-1-1 / II-1-2 / II-2 / II-2-1 / II-2-2, a method of indicating all spatial relation RS sets for each slot group was proposed. However, it is also possible to omit the indication of the spatial relation RS set for some slot groups. In such a slot group where the indication of the spatial relation RS set is omitted, it may be specified that the terminal transmits i) a beam arbitrarily selected by the terminal, or ii) a peripheral beam of the beam indicated for another (or adjacent) slot group (for example, a beam whose difference in the angle of departure is within a specific range). As an example, when the base station indicates a single spatial relation RS set for multi-slot PUSCH transmission, the terminal divides it into K slot groups (either by specific rules or by base station settings), then obtains an optimal beam set for the indicated spatial relation RS set, and based on this beam set, generates K (peripheral) beam sets arbitrarily or according to specific rules, and can apply and transmit one beam set for each slot group sequentially. In these methods, it can be specified to change the beam for adjacent slots (groups) to apply and maximize the diversity effect. However, extremely, if all indications of the spatial relation RS set for multi-slot PUSCH are omitted, the terminal can apply while changing an arbitrary beam for each slot (group).

[0287] Hereinafter, a method of mapping N slots (or symbol groups) constituting PUSCH / PUCCH to K spatial relation RSs will be proposed.

[0288] In order to maximize the reliability (Reliability), it is more preferable to form slot groups with as equal a number as possible according to the total number of slots (aggregationFactorUL) N constituting PUSCH and the number K of spatial relation RS sets (spatial relation RS sets). For example, assuming N ∈ {2, 4, 8, 16} and K ∈ {1, 2, 3, 4}, the number of slots N_k included in the k-th slot group can be configured as follows.

[0289] The values in the table described below mean {N_1, …, N_K} in the combination of the N value and the K value. That is, it is more preferable to configure such that the deviation of the N_k value (k = 1, …, K) is minimized as much as possible.

[0290] Table 8 illustrates a method of allocating the number of slots for each slot group.

[0291]

Table 8

[0292] The proposed technology of the present disclosure may be extended and used for purposes other than enhancing reliability. That is, the multi-slot PUSCH transmission may be used for the purpose that different transport blocks (TBs) are transmitted instead of the same TB being repeatedly transmitted within each slot.

[0293] In this case, the terminal can transmit different TBs for each slot group using different beams.

[0294] When considering such a purpose, as proposed above, not only combinations with a small deviation of the N_k value (k = 1, …, K) but also applications of combinations with a large deviation depending on the time can be considered. Therefore, the base station can set / indicate to the terminal the method of allocating the number of slots for each slot group to be applied (and the method of mapping the space-related RS set for each slot based on the allocation method). In other words, the terminal may be set / indicated by the base station about the method of allocating the number of slots for each slot group to be applied (and the method of mapping the space-related RS set for each slot based on the allocation method).

[0295] Based on the previous Table 8, various methods may be used when performing slot grouping. When considering hardware conditions such as beam / panel switching delay and power transition time, even if the terminal transmits while switching beams, i) guard symbols (i.e., muted symbols) are not required between consecutive symbols in which the beam is changed, and / or ii) the timing advance (TA) applied for each beam is the same (or the difference value is within a specific value), and / or iii) the power difference applied for each beam is within a certain value (or the power transition time is within a specific time or the same power control is applied), then the terminal can maximize time diversity by transmitting while frequently changing beams. That is, the slot group transmitted with the same beam may be extended to the widest time domain (span). An example of such a method is as follows. The values in Table 9 represent {K_1,…,K_N} in the combination of the N value and the K value, and K_n represents the index of the spatial correlation RS set applied in the nth slot. K_n ∈ {1,…,K}. The proposed method in Table 9 has the characteristic of sequentially mapping the spatial correlation RS set index for each slot index. At this time, the spatial correlation RS set index is mapped in a circular manner. For the sake of convenience, this method is referred to as the 'full shuffling method'.

[0296] Table 9 illustrates the slot-by-slot spatial correlation RS set mapping method (full shuffling mapping method).

[0297]

Table 9

[0298] On the other hand, when the terminal changes the beam according to the above various hardware conditions (depending on UE capabilities) and / or TA conditions and / or power control related conditions, if there is a burden such as the need for a guard time or further power consumption, it may be more preferable to minimize the number of beam changes as in the proposed method in Table 10 below. The feature of the method in Table 10 below is to map the k-th slot group to N_k consecutive slots to minimize the number of changes in the spatial related RS. For convenience, this method is called the'sequential mapping method'.

[0299] Table 10 illustrates a spatial related RS set mapping method by slot (sequential mapping method).

[0300]

Table 10

[0301] A mapping method that mutually complements the advantages and disadvantages of the previous Tables 9 and 10 can also be considered. For example, when K = 2 and N = 8, it may be possible to reduce the number of changes in the spatial related RS compared to the method in the previous Table 9, such as {1, 1, 2, 2, 1, 1, 2, 2}, and obtain time diversity compared to the method in Table 10. As another example, when K = 2 and N = 16, it may be possible to group in units of 4 slots, such as {1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2}, and map K spatial related RSs in a cyclic manner for each group. That is, the N slots are grouped into a plurality of discontinuous slot sub - groups composed of M (a natural number smaller than N) slot units, and while K spatial related RSs are cyclically mapped for each group, the same spatial related RS may be mapped for the slots within the same group. The feature of such a method is to compose the k-th slot group of a plurality of discontinuous slot sub - groups composed of consecutive slots. For convenience, this method is called the 'hybrid mapping method'.

[0302] As proposed above, the base station can configure one of various slot group configuration methods (or spatial relation RS set mapping methods) for the terminal (e.g., in an RRC message, etc.). Alternatively, a slot group configuration method (or spatial relation RS set mapping method) that conforms to a specific use case may be defined / set. As an example, when the TB is repeatedly transmitted during multi-slot scheduling (which applies to the URLLC use case), it may be defined / set to use the full shuffling method. On the other hand, when the TB is not repeatedly transmitted during multi-slot scheduling, it may be defined / set to use the sequential mapping method. As yet another example, when different TUs are mapped to consecutive symbols, it may be defined / set to use the sequential mapping method so that the beam is not changed (as much as possible) between adjacent symbols. On the other hand, when different TUs are mapped to discontinuous symbols, it may be defined / set to use the full shuffling mapping method that maximizes diversity.

[0303] Similarly, one of various slot group configuration methods (or spatial relation RS set mapping methods) may be configured for the terminal by the base station (e.g., in an RRC message, etc.). Alternatively, a slot group configuration method that conforms to a specific use case or TU allocation situation may be defined / set.

[0304] The proposal according to the present disclosure described above may be performed by the base station and / or the terminal illustrated in FIG. 15. Assume a case where the base station is embodied as the first device 100 and the terminal is embodied as the second device 200 for explanation.

[0305] In particular, in relation to Proposal II-1, the processor 102 of the base station 100 sets the N-slot PUSCH and transmits the setting information to the terminal via the transceiver 106. Further, the processor 102 divides the N slots into K slot groups and determines a spatial relation RS set for each slot group (or determines a terminal beam for transmitting PUSCH for each slot group or determines a base station beam / TRP / panel for receiving PUSCH for each slot group). Such spatial relation RS set information for each slot group may be stored in the memory 104. Further, the processor 102 transmits information regarding the spatial relation RS set determined for each slot group to the terminal via the transceiver 106.

[0306] Also, in relation to Proposal II-2, the processor 202 of the terminal obtains, from the base station, information regarding a method of dividing N slots into K slot groups for N-slot PUSCH via the transceiver 206. Such division information may be stored in the memory 204. Further, the processor 202 receives, from the base station, N-slot PUSCH scheduling DCI via the transceiver 206. The processor 202 obtains spatial relation RS set information for each slot group (according to the configured / indicated information). The spatial relation RS set information mapped for each such slot group may be stored in the memory 204. Also, when transmitting PUSCH (and DMRS) in each slot group, if the mapped spatial relation RS (antenna port) set corresponds to the uplink RS, the processor 202 transmits the PUSCH and PUSCH DMRS antenna ports using the spatial domain filter (or beam) that transmitted the mapped spatial relation RS (antenna port) set. When transmitting PUSCH (and DMRS) in each slot group, if the mapped spatial relation RS (antenna port) set corresponds to the downlink RS, after determining the Tx spatial domain filter (or beam) corresponding to the Rx spatial domain filter (or beam) that received the mapped spatial relation RS (antenna port) set, the processor 202 applies the filter and transmits the PUSCH and PUSCH DMRS antenna ports.

[0307] Example III

[0308] This embodiment includes various examples of mapping or applying uplink beam related information (e.g., spatial relation RS) when a split occurs for a specific transmission unit (TU) with respect to an uplink channel (e.g., PUSCH or PUCCH) repeatedly transmitted by a plurality of transmission units (TUs).

[0309] In the following examples, for clarity of explanation, TU is exemplified as a time unit, but the scope of the present disclosure is not limited thereto, and the transmission unit may be set as a time unit, a frequency unit, or a time-frequency unit.

[0310] Here, the term spatial relation RS may be replaced by the term uplink (UL) TCI (transmission configuration indicator) or UL TCI state information. That is, in the examples of the present disclosure, the spatial relation RS means a reference signal for a transmission beam or filter configuration. Further, considering the case where the spatial relation RS is extended to or includes an RS for other functions, roles, or operations (for example, an RS for pathloss reference, an RS for reference to a terminal antenna panel, etc.), the spatial relation RS can be referred to as UL TCI (or, UL TCI state information). Also, considering the case where the spatial relation RS constitutes one state information together with information regarding other functions, roles, or operations (for example, information regarding a pathloss reference RS, information regarding a reference RS for a terminal antenna panel, uplink power control parameters, etc.), the spatial relation RS can be referred to as UL TCI (or UL TCI state information). In the following description, for clarity of explanation, the term spatial relation RS is mainly used, but various examples regarding the mapping between TU and the spatial relation RS in the present disclosure include examples regarding the mapping between TU and UL TCI (or, UL TCI state information).

[0311] The various examples of the foregoing Example I and Example II include rules or setting schemes for mapping M spatial correlation reference signals (RSs) to N transmission units (TUs) when repeatedly transmitting an uplink channel (e.g., PUSCH or PUCCH) using N TUs. Further, the various examples of Example I and II include schemes for setting N TUs into K TU groups (e.g., slot groups or symbol groups). Further, the various examples of Example I and II include schemes for applying different spatial correlation RSs (or transmission beams) to each of the K TU groups. Further, the various examples of Example I and II include signaling schemes related to such mapping rules, settings, or applications.

[0312] Based on the various mapping relationships between TUs and spatial correlation RSs in Example I and Example II, in this example, rules, settings, or applications for mapping spatial correlation RSs and corresponding signaling schemes for cases where one or more of a plurality of TUs are split will be described.

[0313] When a TU is split, it includes cases where one TU is mapped across a predetermined time resource boundary. Also, when a TU is split, it includes cases where one TU includes a predetermined time resource boundary. Here, the predetermined time resource boundary is a slot boundary, but the scope of the present disclosure is not limited thereto, and the predetermined time resource boundary may correspond to any time resource boundary.

[0314] The PUSCH retransmission method that allows the separation of TUs can also be referred to as PUSCH retransmission type B, but the scope of the present disclosure is not limited to specific mapping type names. The PUSCH retransmission method without TU separation can be referred to as PUSCH retransmission type A. In other words, when one PUSCH is retransmitted in N TUs, a specific TU among them may be separated by a slot boundary. Or, the specific TU can also be expressed as a TU including a slot boundary. TU separation may occur in one TU among one PUSCH retransmission or in multiple TUs. Similarly, TU separation may occur in one or more TUs among one PUCCH retransmission.

[0315] When TU separation occurs, there is ambiguity regarding which spatial-related RS to apply to the separated TUs. That is, only the spatial-related RS mapping rule in units of TU or TU group cannot clearly determine whether the spatial-related RS mapped to each sub-unit is the same or different when a specific TU is separated into multiple sub-units. Therefore, it is necessary to newly define a spatial-related RS mapping scheme for the case where separated TUs occur.

[0316] As a specific example, symbol - unit and slot - unit re - transmission for PUSCH is defined in 3GPP Rel - 15 / 16 NR. In Rel - 17 NR MIMO enhancement, the goal is to improve the reliability of PUSCH. Therefore, as exemplified in Example I and Example II, when performing PUSCH re - transmission, it can be extended so that different spatial - related RS can be applied for each TU (e.g., symbol, slot, symbol group, slot group, etc.), and transmission can be performed by applying different TRPs or different transmission beams at each transmission time. In particular, when it is re - transmission in symbol - based units (i.e., when TU is a symbol or a symbol group), the re - transmission period may also be set in symbol - based units. Here, there may be a case where a specific TU is mapped across a slot boundary. In that case, PUSCH can be separated based on the slot boundary and TB (transport block) can be re - transmitted.

[0317] When a specific TU is mapped across a slot boundary due to the re - transmission period, the symbols before the slot boundary and the symbols after the slot boundary can be separated and TB can be transmitted respectively. At this time, since the number of symbols in the separated TU decreases, the total number of resource elements (RE) for transmitting each TB decreases, and the coding rate of each can increase. For the case where one already - set PUSCH is separated and transmitted with a number of symbols less than the number of symbols of the already - set PUSCH, it can be conveniently referred to as 'PUSCH splitting'. When PUSCH splitting occurs, TB may be re - transmitted a number of times (e.g., N + 1) more than the number of times of re - transmission of the originally - set PUSCH (e.g., N).

[0318] FIG. 11 is a diagram for explaining an example of TU separation to which the present disclosure is applicable.

[0319] In the example of FIG. 11, assume that one TU is set in units of 4 symbols and the number of retransmission times N is set to 4. Also assume that separation occurs in the second TU (i.e., TU(1)) among the 4 TUs. When TU separation occurs, it can be expressed that one TU corresponds to a plurality of transmission occasions (TO), or one TU is separated into a plurality of TOs.

[0320] In this case, in the first TO (TO(0)), PUSCH is transmitted with 4 symbols, in the second TO (TO(1)), PUSCH (i.e., the first separated PUSCH) is transmitted with 2 symbols, in the third TO (TO(2)), PUSCH (i.e., the second separated PUSCH) is transmitted with 2 symbols, in the fourth TO (TO(3)), PUSCH is transmitted with 4 symbols, and in the fifth TO (TO(4)), PUSCH is transmitted with 4 symbols. Thus, one TB may be retransmitted 5 times. Here, for the sake of convenience of terms, it can be said that both the second TO (TO(1)) and the third TO (TO(2)) are mapped to the second TU (TU(1)), the first TO (TO(0)) is mapped to the first TU (TU0), the fourth TO (TO(3)) is mapped to the third TU (TU2), and the fifth TO (TO(4)) is mapped to the fourth TU (TU3).

[0321] When information regarding the number of retransmission times of PUSCH (e.g., N), the number of symbols constituting one TU (or the symbol duration of one PUSCH), the retransmission period, the spatial - related RS set applied to the N - time retransmission, etc. is set or instructed to the terminal, if PUSCH separation occurs in a specific TU and the actual number of times of retransmitting the TB (i.e., the number of TOs) increases more than N, ambiguity may occur as to how to map or apply the set of N spatial - related RS sets to each TO. In the present disclosure, various solutions to such problems will be described.

[0322] In the following description, for the sake of clarity, the spatial relation RS configured or indicated for the n-th PUSCH TU (or TU index n) is referred to as RS(n), and the set of RS(n) for RS(n) where n = 0, ..., N - 1 is referred to as the spatial relation RS set. Also, assume that the TU in which TU separation occurs is the k-th TU, and the k-th TU is separated into two TOs. However, such an assumption is merely exemplary, and TU separation may occur in one or more TUs during N PUSCH retransmissions, and one TU may be separated into two or more TOs. Further, the following exemplification describes PUSCH retransmissions, but the same content may be applicable to PUCCH retransmissions.

[0323] FIG. 12 is a flowchart for explaining uplink channel retransmission according to an embodiment of the present disclosure.

[0324] In step S1210, the terminal can map one uplink channel to a plurality of transmission opportunities (TOs). That is, the uplink channel can be mapped to the time / frequency resources corresponding to each TO so that one uplink channel is retransmitted a plurality of times. Here, the plurality of TOs are associated with a plurality of TUs that are fewer than the number of TOs, and each of one or more of the plurality of TUs may be associated with two or more consecutive (e.g., consecutive in the time domain or consecutive in the frequency domain) TOs. That is, each of the at least one TU may correspond to a separated TU.

[0325] In step S1220, the terminal can map spatial relation RS (or RS based on UL TCI information) to each of the K TOs. The spatial relation RS mapped to each TO can be based on a predetermined method described in the following exemplification.

[0326] In step S1230, the terminal can transmit the one uplink channel based on the spatial relation RS associated with the TO at each of the K TOs.

[0327] Hereinafter, an example of a predetermined method applied in step S1220 will be described.

[0328] For example, the predetermined method applied in step S1220 may include a preset mapping method. The preset mapping method may include the following cyclic mapping method (or full shuffling method), sequential mapping method, hybrid mapping method, etc. For example, when TU separation occurs, assume that the number of TOs is K and the number of spatial-related RSs included in the spatially related RS set set for the terminal is P. The cyclic mapping method includes a method in which P spatial-related RSs are cyclically and sequentially mapped in ascending order of the index of each of the K TOs. The sequential mapping method includes a method in which K TOs are grouped into Q TO groups, and P spatial-related RSs are sequentially mapped in ascending order of the index of the Q TO groups. The hybrid method includes a method in which K TOs are grouped into Q TO groups, each of the Q TO groups includes R TOs, and for each TO group, P spatial-related RSs are cyclically and sequentially mapped in ascending order of the index of the TO group.

[0329] Hereinafter, examples of various mapping methods that can be applied in addition to or instead of the preset mapping method as described above will be described.

[0330] Method III-1

[0331] According to this example, except for the separated PUSCH TO, RS is applied according to the TU index n, and for the separated PUSCH TO, the following detailed method may be applied.

[0332] For example, for the remaining (i.e., non-separated) TUs excluding the separated TOs (i.e., when one TU is separated, the multiple TOs mapped / corresponding to the one TU), RS(n) is applied based on the TU index n, and for the separated TOs, the spatial-related RS can be applied by the following detailed method.

[0333] FIG. 13 is a diagram showing a spatial-related RS mapping method according to various exemplary embodiments of the present disclosure.

[0334] Method III-1-1

[0335] RS(k) can be commonly (or identically) applied to all of the separated TOs.

[0336] For example, as shown in the example of III-1-1 in FIG. 13, RS(0), RS(1), RS(1), RS(2), and RS(3) may be respectively applied to TO(0), TO(1), TO(2), TO(3), and TO(4).

[0337] Method III-1-2

[0338] RS(k) can be applied to a specific one of the separated TOs, and for the remaining TOs among the separated TOs, a predefined or pre-set spatial-related RS can be applied. The same spatial-related RS may be applied to the remaining TOs among the separated TOs, or different spatial-related RSs may be applied to each of the remaining TOs among the separated TOs.

[0339] Among the separated TOs, the specific one TO can be referred to as the "reference TO". For example, the reference TO may be the first (or last) TO in the separated TOs in chronological order.

[0340] Here, the predefined or preconfigured spatial relation RS applied to the remaining TOs among the separated TOs may be included in the set of spatial relation RSs or may be set separately from the set of spatial relation RSs. The separately set RS set may or may not be included in the set of spatial relation RSs.

[0341] For example, among the set of spatial relation RSs, the spatial relation RS corresponding to a specific TU index or a specific order (e.g., RS(0), RS(N - 1), or one or more RSs including RS(0) or RS(N - 1)) may be applied to the remaining TOs among the separated TOs.

[0342] For example, the RS set separately set from the set of spatial relation RSs for the remaining TOs among the separated TOs may be the spatial relation RS set as the default or the spatial relation RS separately set by upper layer signaling.

[0343] For example, the default spatial relation RS applied to the remaining TOs among the separated TOs may correspond to the spatial relation RS corresponding to the lowest PUCCH ID. Or, if no spatial relation RS is set for PUCCH, the default spatial relation RS may correspond to the type D QCL RS included in the default TCI. Here, the default TCI may correspond to a specific TCI state set for downlink channel (e.g., PDSCH) transmission, and the type D QCL may be defined as the QCL between antenna ports for beamforming related to the channel characteristics of spatial reception parameters.

[0344] For example, the spatial relation RS applied to the remaining TOs among the separated TOs may be preconfigured or pre - specified by the upper layer.

[0345] For example, as shown in the illustration of III-1-2 in FIG. 13, for TO(0), TO(1), TO(2), TO(3), and TO(4), RS(0), RS(1), RS(x), RS(2), and RS(3) may be respectively applied. Here, RS(x) may be a specific one among RS(0), RS(1), RS(2), RS(3) (for example, RS(0) or RS(3)), may be set by default, or may be set by the upper layer. Here, RS(1) and RS(x) may be the same or different.

[0346] Method III-1-3

[0347] A predefined or pre-set spatial-related RS can be applied to the separated TO. The same spatial-related RS may be applied to the separated TO, or different spatial-related RSs may be applied to each of the separated TOs.

[0348] Here, the predefined or pre-set spatial-related RS applied to the separated TO may be included in the spatial-related RS set or may be set separately from the spatial-related RS set. The separately set RS set may or may not be included in the spatial-related RS set.

[0349] For example, among the spatial-related RS set, a spatial-related RS corresponding to a specific TU index or a specific order (for example, RS(0), RS(N-1), or one or more RSs including RS(0) or RS(N-1)) may be applied to the separated TO.

[0350] For example, the RS set separately set from the spatial-related RS set for the separated TO may be a spatially related RS set as set by default or a spatially related RS set separately set by upper layer signaling.

[0351] For example, the default spatial relation RS applied to the separated TO may correspond to the spatial relation RS corresponding to the lowest PUCCH ID. Or, if the spatial relation RS is not set for the PUCCH, the default spatial relation RS may correspond to the type D QCL RS included in the default TCI.

[0352] For example, the spatial relation RS applied to the separated TO may be pre-set or pre-specified by the upper layer.

[0353] For example, as shown in the illustration of III-1-3 in FIG. 13, RS(0), RS(y), RS(z), RS(2), and RS(3) may be applied to TO(0), TO(1), TO(2), TO(3), and TO(4), respectively. Here, RS(y) and RS(z) may be RS in a specific order (for example, RS(0) and RS(3)) among RS(0), RS(1), RS(2), RS(3), may be set by default, or may be set by the upper layer. Here, RS(x) and RS(y) may be the same or different.

[0354] Method III-2

[0355] According to this illustration, regardless of the presence or absence of TU separation, RS(n) may be mapped in the order of TO, and the following detailed method may be applied to the remaining TOs to which RS(n) is not mapped.

[0356] For example, regardless of the presence or absence of TU separation, the spatial-related RSs included in the spatial-related RS set can be applied based on the TO index (or in the order of TO). For example, it can be assumed that the number of TUs is set to N, among which TU separation occurs from one or more TUs, and the number of TOs corresponding to the N TUs is N + S (if one of the N TUs is separated into two TOs, then S = 1). In this case, among the TO indices 0, 1,..., N + S - 1, for the TO indices 0, 1,..., N - 1 (hereinafter, the first N TOs), RS(0), RS(1),..., RS(N - 1) can be applied respectively.

[0357] For the TO indices N, N + 1,..., N + S - 1 (that is, the remaining S TOs), the spatial-related RS can be applied by the following detailed method.

[0358] Method III-2-1

[0359] For all TOs, the spatial-related RSs in the spatial-related RS set (that is, RS(0), RS(1),..., RS(N - 1)) may be cyclically applied or mapped based on the TO index (or in the order of TO). For example, for the first N TOs, RS(0), RS(1),..., RS(N) may be applied, and for the remaining S TOs, RS(0), RS(1),... may be applied (that is, the round-robin TO-to-spatial-related RS mapping method).

[0360] For example, as shown in the illustration of III-2-1 in FIG. 13, for TO(0), TO(1), TO(2), TO(3) and TO(4), RS(0), RS(1), RS(2), RS(3) and RS(0) may be applied respectively.

[0361] Method III-2-2

[0362] Among the spatial-related RSs, the spatial-related RSs mapped to a relatively small number of TOs or TUs can be selected and mapped.

[0363] For example, for the first N TOs, RS(0), RS(1),..., RS(N) may be applied, and the spatial relation RS with the least number of TOs applied to the TOs before a specific TO among the remaining S TOs may be applied to the specific TO.

[0364] Here, if there is no TO before the specific TO (i.e., it is the first TO) or if the number of spatial relation RSs with the least number of TOs applied to the previous TOs (i.e., candidate spatial relation RSs) is plural, the spatial relation RS applied to the specific TO may be selected according to a predetermined rule. Here, the predetermined rule may be defined such that one of the plurality of candidate spatial relation RSs is applied to the specific TO according to the order in which the spatial relation RS is mapped to the TO / TU, the index order of the spatial relation RS, a predetermined or preset order, or an order based on any other criterion.

[0365] For example, as shown in the illustration of III-2-2 in FIG. 13, for TO(0), TO(1), TO(2), TO(3), and TO(4), RS(0), RS(1), RS(2), RS(3), and RS(x) may be applied respectively. Here, RS(x) corresponds to the RS mapped to the least number of RSs applied to TO(0), TO(1), TO(2), and TO(3) before TO(4). In this illustration, since RS(0), RS(1), RS(2), and RS(3) are identically mapped to 1 TO, RS(x) may be selected from among RS(0), RS(1), RS(2), and RS(3) according to a predetermined rule.

[0366] As a further illustration, the method of selecting the spatial relation RS with the least number of TO / TUs applied as described above may be applied to all TOs (e.g., the entire N+S TOs) in addition to the remaining N+S TOs.

[0367] Method III-2-3

[0368] For the remaining S TOs, a predefined or preconfigured spatial relation RS can be applied. The same spatial relation RS may be applied to the remaining S TOs, or individual spatial relations RS may be applied to each of the remaining S TOs.

[0369] Here, the predefined or preconfigured spatial relation RS applied to the remaining S TOs may be included in the set of spatial relations RS, or may be set separately from the set of spatial relations RS. The separately set RS set may or may not be included in the set of spatial relations RS.

[0370] For example, among the set of spatial relations RS, the spatial relation RS corresponding to a specific TU index or a specific order (e.g., for example, RS(0), RS(N - 1), or one or more RSs including RS(0) or RS(N - 1)) may be applied to the remaining S TOs.

[0371] For example, the RS set separately set from the set of spatial relations RS for the remaining S TOs may be the spatially related RS set by default, or the spatially related RS set separately set by upper layer signaling.

[0372] For example, the default spatial relation RS applied to the remaining S TOs may correspond to the spatial relation RS corresponding to the lowest PUCCH ID. Or, if no spatial relation RS is set for PUCCH, the default spatial relation RS may correspond to the type D QCL RS included in the default TCI.

[0373] For example, the spatial relation RS applied to the remaining S TOs may be preconfigured or pre - specified by the upper layer.

[0374] For example, as shown in the illustration of III-2-3 in FIG. 13, for TO(0), TO(1), TO(2), TO(3), and TO(4), RS(0), RS(1), RS(2), RS(3), and RS(y) may be respectively applied. Here, RS(y) may be a specific one of RS(0), RS(1), RS(2), RS(3) (for example, RS(0) or RS(3)), may be set as a default, or may be set by an upper layer.

[0375] Method III-3

[0376] According to this illustration, in accordance with the total number of TOs adjusted by the occurrence of TU separation, the preset or pre-instructed space-related RS set can be sequentially mapped and applied to the corresponding number.

[0377] For example, a set including N space-related RSs, a set including N + 1 space-related RSs, a set including N + 2 space-related RSs,... may be preset or pre-instructed in the terminal. When N uplink channel iterative transmissions in N TUs are set and TU separation does not occur, a set including N space-related RSs may be applied to N TUs (or, N TOs). On the other hand, when TU separation occurs in one of the N TUs, uplink channel iterative transmission may be performed for a total of N + S TOs. In this case, a set including N + S space-related RSs may be applied to N + S TOs. That is, N + S space-related RSs may be mapped or applied based on the indexes of N + S TOs (or, in the order of TOs).

[0378] As a specific illustration, when N = 4 and TU separation occurs in one of them and the total number of TOs is 5, instead of the space-related RS set preset or pre-instructed to be applied when N = 4, the space-related RSs of the space-related RS set preset or pre-instructed to be applied when N = 5 may be applied in the order of TOs.

[0379] For example, as shown in the illustration of III-3 in FIG. 13, for TO(0), TO(1), TO(2), TO(3), and TO(4), RS(0), RS(1), RS(2), RS(3), and RS(4) may be respectively applied.

[0380] All of the above-described methods III-1, III-2, and III-3 can solve the problem of ambiguity regarding which spatial-related RS is applied to each TO when TU separation occurs. According to method III-1, it is advantageous in that the mapping relationship between the TU and the spatial-related RS is maintained except for the separated TU. According to method III-2, it is advantageous in that the mapping relationship of the spatial-related RS is maintained based on the TO instead of the TU. According to method III-3, it has the effect that the base station can set the mapping relationship between the TO / TU and the spatial-related RS with a more flexible combination.

[0381] Also, although the above illustration has been described based on PUSCH retransmission, the scope of the present disclosure is not limited thereto, and it is also applicable to PUCCH retransmission.

[0382] Also, in the above illustration, the spatial-related RS mapping scheme for the case where separation occurs at a specific transmission time when the uplink channel (e.g., PUSCH or PUCCH) is retransmitted on the time axis has been described. However, the present disclosure is not limited thereto. Similar methods are also applicable when the uplink channel is retransmitted on the frequency axis or when it is retransmitted on both the time and frequency axes, and the mapping relationship between the specific transmission resource and the spatial-related RS may be determined or set. For example, when uplink channel retransmission in a predetermined time / frequency resource unit is set and the specific time / frequency resource unit is mapped across a predetermined time / frequency resource boundary (or when the specific time / frequency resource unit includes a predetermined time / frequency resource boundary), the spatial-related RS applied to the sub-units of the specific time / frequency resource unit may be determined or set by the various embodiments described above.

[0383] FIG. 14 is a diagram for explaining a signaling operation between a base station (BS) and a terminal (UE) according to an embodiment of the present disclosure.

[0384] In the illustration of FIG. 14, the BS and the UE are exemplary devices and can be replaced by the devices illustrated in FIG. 15. The illustration of FIG. 14 is merely for convenience of explanation and does not limit the scope of the present disclosure. Also, some operations shown in FIG. 14 may be omitted depending on circumstances and / or settings.

[0385] First, the operation of the UE will be described.

[0386] The UE can receive configuration information from the BS (S1410). Alternatively, the UE may be configured to perform a specific operation based on information provided by the BS.

[0387] For example, the configuration information may include information regarding the number of uplink channel retransmission times (or retransmission levels), the number of time and / or frequency resource units included in one TU, the uplink channel retransmission period, or one or more in a spatial - related RS set corresponding to one or more retransmission levels.

[0388] As a further example, the configuration information may include one or more of configuration information for data transmission and reception, resource allocation information, scheduling information, beam / TRP related information (e.g., spatial related RS information or UL TCI related information), etc. For example, the configuration information for data transmission and reception may include information related to the iterative transmission of an uplink channel (e.g., PUCCH / PUSCH, etc.). The information related to the iterative transmission may include one or more of the number of iterations, the number of symbols (or slots) constituting one TU (or duration), the iterative transmission period, etc. For example, the beam / TRP related information may include information related to spatial related RS or a set of spatial related RS applied to the iterative transmission of an uplink channel (e.g., PUCCH / PUSCH, etc.). For example, the beam / TRP related information may include information related to spatial related RS available when a specific TU (e.g., time / frequency unit) is mapped across a predetermined resource boundary (e.g., slot boundary) during the iterative transmission of an uplink channel (e.g., PUCCH / PUSCH, etc.), that is, when TU separation occurs (e.g., default spatial related RS, spatial related RS in a specific order, etc.). Such configuration information may be transmitted by upper layer signaling (e.g., RRC signaling, MAC CE, etc.).

[0389] For example, the operation in which the UE receives configuration information from the BS at step S1410 may be implemented by the apparatus of FIG. 15. For example, referring to FIG. 15, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104, etc. to receive configuration information, and can receive configuration information from the BS via one or more transceivers 106.

[0390] The UE can receive control information from the BS (S1415). The control information may be DCI including an uplink grant (UL grant) for uplink channel (e.g., PUCCH / PUSCH, etc.) scheduling. Step S1415 may be omitted in some cases (e.g., in the case of uplink channel transmission without an uplink grant such as configured grant or semi-persistent scheduling).

[0391] For example, the operation of the UE receiving control information from the BS in step S1415 may be implemented by the apparatus in FIG. 15. For example, referring to FIG. 15, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104, etc., to receive control information, and can receive control information from the BS via one or more transceivers 106.

[0392] The UE can transmit an uplink channel (e.g., PUCCH and / or PUSCH) to the BS (S1420). For example, based on various examples of the present disclosure described above, the UE can transmit an uplink channel to the BS. For example, the UE can transmit the uplink channel repeatedly.

[0393] For example, when repeatedly transmitting an uplink channel (e.g., PUCCH / PUSCH, etc.), a specific TU (e.g., time / frequency unit) may be mapped across a predetermined resource boundary (e.g., slot boundary), i.e., TU separation may occur. In this case, based on the examples of the present disclosure described above, the mapping of beam / TRP related information (e.g., spatial related RS or UL TCI) for a plurality of TUs including the separated TU can be set / applied to transmit the uplink channel.

[0394] For example, assuming that the k-th PUCCH / PUSCH TU is separated, the spatial-related RS (e.g., RS(k)) to be applied to the PUCCH / PUSCH can be applied identically to all of the separated PUCCH / PUSCH. Or, RS(k) can be applied to a specific one corresponding to the separated TU (e.g., the PUSCH transmitted at the first TO), and the other TUs can transmit PUCCH / PUSCH by applying a pre-set spatial-related RS (e.g., default spatial-related RS or RS in a specific order, etc.). Or, for the separated TUs, a pre-defined or pre-set spatial-related RS that is applied in the case of PUCCH / PUSCH separation can be applied. For example, methods such as mapping RS(n) in the order of TOs regardless of the presence or absence of TU separation, and circulating and mapping the remaining TOs to which RS(n) is not mapped in a round-robin manner, mapping the spatial-related RS mapped to a relatively small number of TOs / TUs, mapping a pre-defined spatial-related RS, etc. can be applied to transmit PUCCH / PUSCH.

[0395] For example, the operation in which the UE transmits an uplink channel to the BS at stage S1420 may be implemented by the apparatus in FIG. 15. For example, referring to FIG. 15, one or more processors 102 can control one or more transceivers 106 and / or one or more memories 104, etc. to transmit an uplink channel, and can transmit the uplink channel to the BS via one or more transceivers 106.

[0396] Next, the operation of the BS will be described.

[0397] The BS can transmit configuration information to the UE (S1410).

[0398] For example, the configuration information can include information regarding the number of uplink channel retransmission times (or retransmission level), the number of time and / or frequency resource units included in one TU, the uplink channel retransmission period, or one or more of the sets of spatial-related RS corresponding to one or more retransmission levels.

[0399] As a further example, the configuration information may include one or more of configuration information for data transmission and reception, resource allocation information, scheduling information, beam / TRP related information (e.g., spatial related RS information or UL TCI related information), etc. For example, the configuration information for the data transmission and reception may include information related to the repeated transmission of an uplink channel (e.g., PUCCH / PUSCH, etc.). The information related to the repeated transmission may include one or more of the number of repetitions, the number of symbols (or slots) constituting one TU (or duration), the repeated transmission period, etc. For example, the beam / TRP related information may include information regarding a spatial related RS or a set of spatial related RSs applied to the repeated transmission of an uplink channel (e.g., PUCCH / PUSCH, etc.). For example, the beam / TRP related information may include information regarding a spatial related RS that can be used when a specific TU (e.g., a time / frequency unit) is mapped across a predetermined resource boundary (e.g., a slot boundary), i.e., when TU separation occurs, during the repeated transmission of an uplink channel (e.g., PUCCH / PUSCH, etc.) (e.g., default spatial related RS, spatial related RS in a specific order, etc.). Such configuration information may be transmitted by upper layer signaling (e.g., RRC signaling, MAC CE, etc.).

[0400] For example, the operation of the BS in step S1410 to transmit configuration information to the UE may be implemented by the apparatus in FIG. 15. For example, referring to FIG. 15, one or more processors 202 may control one or more transceivers 206 and / or one or more memories 204, etc., to transmit the configuration information, and the configuration information may be transmitted to the UE via one or more transceivers 206.

[0401] The BS can transmit control information to the UE (S1415). The control information may be DCI including an uplink grant (UL grant) for uplink channel (e.g., PUCCH / PUSCH, etc.) scheduling. Step S1415 may be omitted in some cases (e.g., in the case of uplink channel transmission without an uplink grant such as configured grant or semi-persistent scheduling).

[0402] For example, the operation of the BS transmitting control information to the UE in step S1415 may be implemented by the apparatus in FIG. 15. For example, referring to FIG. 15, one or more processors 202 can control one or more transceivers 206 and / or one or more memories 204, etc. to transmit control information, and can transmit the control information to the UE via one or more transceivers 206.

[0403] The BS can receive an uplink channel (e.g., PUCCH and / or PUSCH) from the UE (S1420). For example, based on various exemplifications of the present disclosure described above, the BS can receive an uplink channel from the UE. For example, the uplink channel may be repeatedly transmitted from the UE.

[0404] For example, when an uplink channel (e.g., PUCCH / PUSCH, etc.) is repeatedly transmitted from the UE, a specific TU (e.g., a time / frequency unit) may be mapped across a predetermined resource boundary (e.g., a slot boundary), that is, TU separation may occur. In this case, based on the exemplifications of the present disclosure described above, mapping of beam / TRP related information (e.g., spatially related RS, or UL TCI) for a plurality of TUs including the separated TU may be set / applied and the uplink channel may be received.

[0405] For example, assuming that the k-th PUCCH / PUSCH TU is separated, the spatial-related RS (e.g., RS(k)) applied to the PUCCH / PUSCH may be applied identically to all of the separated PUCCH / PUSCH. Or, RS(k) may be applied to a specific one corresponding to the separated TU (e.g., the PUSCH transmitted at the first TO), and to other TUs, a pre-set spatial-related RS (e.g., default spatial-related RS) or RS in a specific order, etc. may be applied, and the PUCCH / PUSCH may be received. Or, for the separated TUs, a pre-determined or pre-set spatial-related RS applied in the case of PUCCH / PUSCH separation may be applied. For example, regardless of the presence or absence of TU separation, RS(n) is mapped in the order of TO, and the remaining TOs to which RS(n) is not mapped are cyclically mapped in a round-robin manner, a method in which the spatial-related RS mapped to a relatively small number of TOs / TUs is mapped, a method in which a pre-defined spatial-related RS is mapped, etc. may be applied, and the PUCCH / PUSCH may be received.

[0406] For example, the operation in which the BS receives an uplink channel from the UE at stage S1420 may be implemented by the apparatus of FIG. 15. For example, referring to FIG. 15, one or more processors 202 may control one or more transceivers 206 and / or one or more memories 204, etc. to receive the uplink channel, and may receive the uplink channel from the UE via one or more transceivers 206.

[0407] General devices applicable to the present disclosure

[0408] FIG. 15 illustrates a block configuration diagram of a wireless communication device according to an embodiment of the present disclosure.

[0409] Referring to FIG. 15, the first wireless device 100 and the second wireless device 200 can transmit and receive wireless signals using various wireless connection technologies (e.g., LTE, NR).

[0410] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 controls the memory 104 and / or the transceiver 106, and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. For example, after processing the information in the memory 104 to generate a first information / signal, the processor 102 may transmit a wireless signal including the first information / signal from the transceiver 106. Also, after receiving a wireless signal including a second information / signal from the transceiver 106, the processor 102 can store the information obtained from the signal processing of the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and can store various information related to the operation of the processor 102. For example, the memory 104 can store software code including instructions for performing part or all of the processes controlled by the processor 102 or for executing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 106 may be connected to the processor 102 and can transmit and / or receive wireless signals via one or more antennas 108. The transceiver 106 can include a transmitter and / or a receiver. The transceiver 106 may be equivalently referred to as an RF (Radio Frequency) unit. In the present invention, the wireless device may mean a communication modem / circuit / chip.

[0411] The second wireless device 200 includes 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 controls the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. For example, after processing the information in the memory 204 to generate third information / signals, the processor 202 may transmit a wireless signal including the third information / signals from the transceiver 206. Also, after receiving a wireless signal including fourth information / signals from the transceiver 206, the processor 202 may store the information obtained from the signal processing of the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and can store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for performing part or all of the processes controlled by the processor 202 or for executing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 206 may be connected to the processor 202 and can transmit and / or receive wireless signals via one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be alternatively referred to as an RF unit. In the present invention, the wireless device may mean a communication modem / circuit / chip.

[0412] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102 and 202 can generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) according to the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. One or more processors 102 and 202 can generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure. One or more processors 102 and 202 can generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure, and provide it to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain a PDU, an SDU, a message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure.

[0413] One or more processors 102, 202 can be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be embodied by hardware, firmware, software, or a combination thereof. As an example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) may be included in the one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure may be embodied using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, and the like. The firmware or software configured to execute the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure may be included in the one or more processors 102, 202, stored in the one or more memories 104, 204, and driven by the one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in the present disclosure may be embodied by firmware or software in the form of code, instruction words, and / or a set of instruction words.

[0414] One or more memories 104, 204 may be coupled to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, codes, instructions and / or commands. The one or more memories 104, 204 may be constituted by a ROM, a RAM, an EPROM, a flash memory, a hard drive, a register, a cache memory, a computer-readable storage medium and / or a combination thereof. The one or more memories 104, 204 may be located inside and / or outside the one or more processors 102, 202. Also, the one or more memories 104, 204 may be coupled to the one or more processors 102, 202 by various techniques such as wired or wireless connections.

[0415] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc. mentioned in the methods and / or operation sequence diagrams of the present disclosure to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams disclosed in the present disclosure from one or more other devices. For example, one or more transceivers 106, 206 may be connected to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information or wireless signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information or wireless signals from one or more other devices. Also, one or more transceivers 106, 206 may be connected to one or more antennas 108, 208, and one or more transceivers 106, 206 may be configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams disclosed in the present disclosure via one or more antennas 108, 208. In the present disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may convert received wireless signals / channels, etc. from RF band signals to baseband signals in order to process received user data, control information, wireless signals / channels, etc. using one or more processors 102, 202. One or more transceivers 106, 206 may convert user data, control information, wireless signals / channels, etc. processed using one or more processors 102, 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 can include (analog) oscillators and / or filters.

[0416] The embodiments described above are those in which the components and features of the present disclosure are combined in a predetermined form. Each component or feature should be considered as optional unless specifically stated otherwise. Each component or feature may be implemented in a form that does not combine with other components or features. It is also possible to combine some components and / or features to constitute an embodiment of the present disclosure. The order of operations described in the embodiments of the present disclosure may be changed. Some components or features of an embodiment may be included in other embodiments, or may be replaced with corresponding components or features of other embodiments. It is obvious that claims without an explicit citation relationship in the claims can be combined to constitute an embodiment, or can be included as new claims by amendment after filing.

[0417] It is obvious to those skilled in the art that the present disclosure can be embodied in other specific forms without departing from the essential features of the present disclosure. Therefore, the above detailed description should not be construed as limiting in any way, but should be considered as exemplary. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and any changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure.

[0418] The scope of the present disclosure includes software or machine-executable instructions (e.g., operating regimes, applications, firmware, programs, etc.) that cause the operations of the various example methods to be executed on a device or computer, and non-transitory computer-readable media on which such software or instructions are stored and executable on a device or computer. Instructions available for programming a processing system to execute the features described in the present disclosure may be stored on / within a storage medium or computer-readable storage medium, and the features described in the present disclosure may be implemented using a computer program product including such a storage medium. The storage medium can include, but is not limited to, high-speed random access memory such as DRAM, SRAM, DDR RAM, or other random access solid-state memory devices, and can include non-volatile memory such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory can optionally include one or more storage devices located remotely from the processor. The memory or, alternatively, the non-volatile memory device within the memory includes a non-transitory computer-readable storage medium. The features described in the present disclosure may be stored on any one of the machine-readable media, control the hardware of the processing system, and be integrated into software and / or firmware that enables the processing system to interact with other mechanisms to utilize the results according to the embodiments of the present disclosure. Such software or firmware can include, but is not limited to, application code, device drivers, operating regimes, and execution environments / containers.

[0419] Here, the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure can include, in addition to LTE, NR, and 6G, Narrowband Internet of Things (NB-IoT) for low-power communication. At this time, for example, the NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-mentioned names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (XXX, YYY) of the present disclosure can communicate based on LTE-M technology. At this time, as an example, the LTE-M technology may be an example of LPWAN technology and may be called by various names such as eMTC (enhanced Machine Type Communication). For example, the LTE-M technology may be implemented by at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the above-mentioned names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (XXX, YYY) of the present disclosure can include at least any one of ZigBee (registered trademark), Bluetooth (registered trademark), and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-mentioned names. As an example, the ZigBee technology can generate PAN (personal area networks) related to small / low-power digital communication based on various standards such as IEEE 802.15.4 and may be called by various names.

Industrial Applicability

[0420] Although the method proposed in this disclosure has been mainly described with examples applicable to 3GPP LTE / LTE-A and 5G systems, it is applicable to various wireless communication systems in addition to 3GPP LTE / LTE-A and 5G systems.

Claims

1. 1. A method performed by a terminal in a wireless communication system, comprising: receiving information from a base station, the information including a configured number of repetitions associated with an uplink channel; Mapping the uplink channel to a plurality of actual repetitions, where one actual repetition corresponds to one transmission opportunity (TO), and one configured repetition includes one or more actual repetitions; mapping at least one Sounding Reference Signal (SRS) resource to each of the plurality of actual repetitions; and transmitting the uplink channel to a base station based on the at least one SRS resource in each of the plurality of actual iterations. The at least one SRS resource that is mapped to each of two or more actual repetitions included in a single configured repetition is based on a single SRS resource set associated with the single configured repetition; A method according to claim 1, wherein redundancy versions of the two or more actual iterations contained in the single configured iteration are rotated.

2. 2. The method of claim 1, wherein the at least one SRS resource mapped to each of the two or more actual repetitions included in the single configured repetition is based on a same at least one SRS resource index within the single SRS resource set associated with the single configured repetition.

3. A plurality of SRS resource sets are configured; The method of claim 1 , wherein the plurality of SRS resource sets are mapped to a plurality of configured repetitions according to a predetermined mapping scheme.

4. Based on the plurality of SRS resource sets including a first SRS resource set and a second SRS resource set, the predetermined mapping scheme comprises:

4. The method of claim 3, wherein a first mapping pattern of the first SRS resource set and the second SRS resource set is applied to a first configured repetition and a second configured repetition, respectively, and the first mapping pattern is further applied to at least one remaining configured repetition.

5. Based on the plurality of SRS resource sets including a first SRS resource set and a second SRS resource set, the predetermined mapping scheme comprises:

4. The method of claim 3, wherein a second mapping pattern of the first SRS resource set is applied to a first number of configured repetitions, the second SRS resource set is applied to a second number of configured repetitions, and the second mapping pattern is further applied to at least one remaining configured repetition.

6. The method of claim 1 , wherein each of the two or more actual repetitions included in the single configured repetition includes at least one symbol in a slot.

7. The method further includes receiving configuration information from the base station by the terminal; The setting information is a repetition level for the uplink channel; the number of time resource units and / or frequency resource units included in one configured repetition; A repeat transmission period for the uplink channel, or 10. The method of claim 1, further comprising information regarding at least one of: at least one SRS resource set associated with at least one repetition level.

8. 2. The method of claim 1, wherein the uplink channel comprises at least one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

9. A terminal in a wireless communication system, At least one transceiver; at least one processor coupled to the at least one transceiver; The at least one processor receiving information from a base station through the at least one transceiver, the information including a configured number of repetitions associated with an uplink channel; Mapping the uplink channel into a plurality of actual repetitions, where one actual repetition corresponds to one transmission opportunity (TO), and one configured repetition includes one or more actual repetitions; Mapping at least one Sounding Reference Signal (SRS) resource to each of the plurality of actual repetitions; configured to transmit the uplink channel to a base station through the at least one transceiver based on the at least one SRS resource in each of the plurality of actual iterations; The at least one SRS resource that is mapped to each of two or more actual repetitions included in a single configured repetition is based on a single SRS resource set associated with the single configured repetition; The redundancy versions of the two or more actual repetitions included in the single configured repetition are rotated, the terminal.

10. 1. A method performed by a base station in a wireless communication system, comprising: transmitting information including a set number of repetitions associated with an uplink channel to a terminal; and repeatedly receiving the uplink channel from the terminal based on the information; The uplink channel is mapped to a number of actual repetitions, where one actual repetition corresponds to one transmission opportunity (TO), and one configured repetition includes one or more actual repetitions; At least one sounding reference signal (SRS) resource is mapped to each of the plurality of actual repetitions; the uplink channel is received from the terminal based on the at least one SRS resource in each of the plurality of actual repetitions; The at least one SRS resource that is mapped to each of two or more actual repetitions included in a single configured repetition is based on a single SRS resource set associated with the single configured repetition; A method according to claim 1, wherein redundancy versions of the two or more actual iterations contained in the single configured iteration are rotated.

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