Method and device for signal transmission and reception in wireless communication system

Abstract

Disclosed are a method and device for signal transmission and reception in a wireless communication system. The method according to an embodiment of the present disclosure may comprise the steps in which: a first device receives, from a second device, single downlink control information (DCI) for scheduling a plurality of channels; and the first device receives or transmits the plurality of channels on the basis of a transmission technique using a plurality of transmission configuration indicator (TCI) states. Here, the single DCI may include a plurality of fields for scheduling the plurality of channels, and the transmission technique may be indicated on the basis of a configuration of scheduling information indicated by the plurality of fields.

Description

Method and device for transmitting and receiving signals in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0002] The fifth generation (5G) wireless communication system, the successor to 4G LTE (long-term evolution), is a new, clean-slate mobile communication system characterized by high performance, low latency, and high availability. 5G NR (New Radio) can utilize all available spectrum resources, from low-frequency bands below 1 GHz, to intermediate-frequency bands between 1 GHz and 10 GHz, and to high-frequency (or millimeter wave) bands above 24 GHz. 6G wireless communication systems are being developed based on the underlying technologies of 5G wireless communication.

[0003] The 6G wireless communication system is being developed with the goals of (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free Internet of Things (IoT) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be divided into four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity. Considering the requirements of the 6G system, such as a peak data rate of 1 Tbps per device, an end-to-end latency of 1 ms, a maximum spectrum efficiency of 100 bps / Hz, support for mobility of 1000 km / h, satellite integration, artificial intelligence (AI), autonomous vehicles, extended reality (XR), and haptic communication, various technologies are being researched.

[0004] The technical problem of the present disclosure is to provide a method and device for transmitting and receiving a signal in a wireless communication system.

[0005] The technical problem of the present disclosure relates to a method and apparatus for indicating various multi-TRP (transmission and reception point) / STxMP (simultaneous transmission for multiple panels) transmission techniques through a single DCI scheduling multiple channels.

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

[0007] A method according to one embodiment of the present disclosure may include the steps of: receiving, by a first device, a single downlink control information (DCI) scheduling a plurality of channels from a second device; and performing, by the first device, reception or transmission for the plurality of channels based on a transmission scheme using a plurality of transmission configuration indicator (TCI) states. Here, the single DCI includes a plurality of fields for scheduling the plurality of channels, and the transmission scheme may be indicated based on a configuration of scheduling information indicated by the plurality of fields.

[0008] A method according to another embodiment of the present disclosure may include the steps of: transmitting, by a second device, a single downlink control information (DCI) scheduling a plurality of channels to a first device; and performing, by the second device, transmission or reception for the plurality of channels based on a transmission scheme using a plurality of transmission configuration indicator (TCI) states. Here, the single DCI includes a plurality of fields for scheduling the plurality of channels, and the transmission scheme may be indicated based on a configuration of scheduling information indicated by the plurality of fields.

[0009] According to various embodiments of the present disclosure, a method and apparatus for transmitting and receiving signals in a wireless communication system can be provided.

[0010] According to various embodiments of the present disclosure, methods and apparatus for indicating various multi-transmission and reception point (TRP) / simultaneous transmission for multiple panels (STxMP) transmission techniques through a single DCI scheduling multiple channels may be provided.

[0011] According to various embodiments of the present disclosure, there is a technical effect of reducing blind decoding overhead for DCI by scheduling multiple channels using a single DCI.

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

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

[0014] Figure 1 illustrates a flexible network topology to which some examples of the present disclosure may be applied.

[0015] FIG. 2 illustrates an example of a communication system to which some examples of the present disclosure may be applied.

[0016] FIG. 3 illustrates an example of a wireless device to which some examples of the present disclosure may be applied.

[0017] FIG. 4 exemplarily illustrates a communication procedure between a first node and a second node to which some examples of the present disclosure may be applied.

[0018] FIG. 5 illustrates a functional framework for AI operations to which some examples of the present disclosure may be applied.

[0019] FIG. 6 illustrates an example of operations related to AI model training and AI model inference to which some examples of the present disclosure may be applied.

[0020] FIG. 7 illustrates another example of operations related to AI model training and AI model inference to which some examples of the present disclosure may be applied.

[0021] FIG. 8 illustrates another example of operations related to AI model training and AI model inference to which some examples of the present disclosure may be applied.

[0022] FIG. 9 illustrates an electromagnetic spectrum to which some examples of the present disclosure may be applied.

[0023] FIG. 10 illustrates an example of a system information transmission / reception procedure to which some examples of the present disclosure may be applied.

[0024] FIG. 11 exemplarily illustrates a beam management procedure to which some examples of the present disclosure may be applied.

[0025] Figure 12 illustrates an example NTN scenario to which some examples of the present disclosure may be applied.

[0026] Figure 13 illustrates another example of an NTN scenario to which some examples of the present disclosure may be applied.

[0027] FIG. 14 illustrates examples of sensing operations to which some examples of the present disclosure may be applied.

[0028] FIG. 15 illustrates a multi-TRP (Transmission and Reception Point) transmission method in a wireless communication system to which the present disclosure can be applied.

[0029] FIG. 16 is a drawing for explaining the operation of the first device according to an embodiment of the present disclosure.

[0030] FIG. 17 is a drawing for explaining the operation of a second device according to an embodiment of the present disclosure.

[0031] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description set forth below, together with the accompanying drawings, is intended to explain exemplary embodiments of the present disclosure and is not intended to represent the only embodiments in which the present disclosure may be practiced. The following detailed description includes specific details to provide a thorough understanding of the present disclosure. However, one of ordinary skill in the art will appreciate that the present disclosure may be practiced without these specific details.

[0032] In some cases, to avoid obscuring the concepts of the present disclosure, known structures and devices may be omitted or illustrated in block diagram form focusing on the core functions of each structure and device.

[0033] In the present disclosure, when a component is said to be "connected," "coupled," or "connected" to another component, this may include not only a direct connection but also an indirect connection in which another component exists between them. Furthermore, the terms "comprises" or "has" in the present disclosure specify the presence of the mentioned features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0034] In this disclosure, terms such as “first,” “second,” etc. are used only to distinguish one component from another and are not used to limit the components, and do not limit the order or importance between the components unless specifically stated otherwise. Accordingly, within the scope of this disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment.

[0035] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of the claims. As used in the description of the embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

[0036] In this disclosure, "A or B" can mean "only A," "only B," or "both A and B." In other words, "A or B" in this disclosure can be interpreted as "A and / or B." For example, "A, B or C" in this disclosure can mean "only A," "only B," "only C," or "any combination of A, B and C."

[0037] As used herein, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0038] In the present disclosure, “at least one of A and B” may mean “only A,” “only B,” or “both A and B.” Additionally, in the present disclosure, the expressions “at least one of A or B” or “at least one of A and / or B” may be interpreted identically to “at least one of A and B.”

[0039] Additionally, in the present disclosure, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0040] Additionally, parentheses used in the present disclosure may mean "for example." Specifically, when indicated as "control information (PDCCH)", "PDCCH" may be described as an example of "control information." In other words, "control information" in the present disclosure is not limited to "PDCCH," and "PDCCH" may be described as an example of "control information." Furthermore, even when indicated as "control information (i.e., PDCCH)", "PDCCH" may be described as an example of "control information."

[0041] In the following description, 'when, if, in case of' can be replaced with 'based on'.

[0042] Technical features individually described in one drawing in this disclosure may be implemented individually or simultaneously.

[0043] In the present disclosure, a terminal or user equipment (UE) may be a portable device and may be a first node that receives a signal from a base station / second node / IAB (integrated access backhaul) node.

[0044] In the present disclosure, a base station (BS) may be a second node / IAB node / Transmission-Reception Point (TRP).

[0045] In the present disclosure, higher layer parameters may be parameters configured, pre-configured, or pre-defined for the terminal. For example, a base station or a network may transmit higher layer parameters to the terminal. For example, the higher layer parameters may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0046] In the present disclosure, "setting or defining" may be interpreted as being set to a device through predefined signaling (e.g., SIB (system information block), MAC, RRC) from a base station or network. In the present disclosure, "setting or defining" may be interpreted as being set to a device through separate signaling or being defined in advance without separate signaling.

[0047] In the present disclosure, transmitting or receiving a channel means transmitting or receiving information or a signal through the channel. For example, transmitting a control channel means transmitting control information or a signal through the control channel. Similarly, transmitting a data channel means transmitting data information or a signal through the data channel.

[0048] The technology described in the present disclosure can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented with wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0049] The technology described in the present disclosure can be implemented with 6G wireless technology and applied to various 6G systems. For example, the 6G system can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0050] Network structure

[0051] Figure 1 illustrates a flexible network topology to which some examples of the present disclosure may be applied.

[0052] To compensate for incomplete network coverage areas, a network topology that allows for more flexible and resilient split radio access networks (RANs) may be considered. For this purpose, various nodes, such as integrated access backhaul (IAB) nodes, relays, and radio frequency (RF) repeaters, as illustrated in Figure 1, may be applied, or a non-terrestrial network (NTN) may be integrated. For example, an IAB node may correspond to a node that provides wireless backhaul. For example, a relay may refer to any intermediate point, and in the case of a sidelink relay where a terminal functions as a relay, it may collectively refer to a terminal-to-network (U2N) relay and a terminal-to-terminal (U2U) relay. For example, an RF repeater may correspond to a node that simply performs the function of signal amplification and forwarding, or in the case of a network-controlled repeater, it may not only amplify and forward signals but also adjust its transmission and reception settings based on information provided by the network. For example, NTN nodes could be satellites or aircraft that provide NTN coverage that terrestrial networks struggle to provide. Beyond these examples, various intermediate points can be introduced to improve the network topology.

[0053] Referring to Figure 1, a split RAN can support the division of a base station into a centralized unit (CU) and one or more distributed units (DUs). The CU and DU can correspond to logical units. The CU can be further divided into a control plane (CP) portion and one or more user plane (UP) portions. Since a failure in the CU-CP affects not only the CU-UP but also the DUs, various intermediate points can be introduced to compensate for this.

[0054] An intermediate point may correspond to a terminal or a base station, depending on its relationship to other nodes. For example, an IAB node may include a mobile-termination (MT) portion and a unit (DU). The MT may connect the IAB node to a donor node. The unit (DU) of an IAB node may serve other terminals or connect to other IAB nodes to provide multi-hop wireless backhaul to the terminal. For example, an IAB node may correspond to a base station in its relationship to a user-side node, and to a terminal in its relationship to a network-side node.

[0055] In some examples of the present disclosure, the description of a terminal may equally apply not only to a user-side endpoint, but also to an intermediate point corresponding to a terminal in a relative relationship with a network-side endpoint. Similarly, in some examples of the present disclosure, the description of a base station may equally apply not only to a network-side endpoint, but also to an intermediate point corresponding to a base station in a relative relationship with a user-side endpoint. In most cases where there is no additional description of the operations of three or more entities, the communicating entities in the present disclosure are briefly described as terminals and / or base stations (or first nodes and / or second nodes), where the terms terminal and / or base stations (or first nodes and / or second nodes) are interpreted to include / replace any endpoint or any intermediate point in relation to other nodes.

[0056] As such, in some examples of the present disclosure, for the sake of simplicity of explanation, the subjects of the operation may be referred to as terminals and / or base stations (or first nodes and / or second nodes). In addition, the terms terminal and / or base station (or first node and / or second node) may also be interpreted / replaced as in the following examples: For example, the terminal (or first node) and the base station (or second node) may respectively correspond to the first endpoint and the second endpoint; may respectively correspond to the endpoint and the intermediate point; may respectively correspond to the intermediate point and the endpoint; or may respectively correspond to the first intermediate point and the second intermediate point.

[0057] In the present disclosure, there may be zero or more intermediate points between the base station and the terminal. If an intermediate point exists, it may correspond to an IAB node / relay / RF repeater / NTN node, or a node supporting other functions. The intermediate point may be a node with a fixed location or a node with an unfixed location.

[0058] Systems applicable to this disclosure

[0059] FIG. 2 illustrates an example of a communication system to which some examples of the present disclosure may be applied.

[0060] The communication system (100) applied to the present disclosure includes a wireless device (110), a network device (120), and a network (130). Here, the wireless device (110) refers to a device that performs communication using a wireless access technology (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G) and may be referred to as a communication / wireless / 5G / 6G device. Although not limited thereto, the wireless device (110) may include a robot (110a), a vehicle (110b-1, 110b-2), an XR (extended reality) device (110c), a hand-held device (110d), a home appliance (110e), an IoT (Internet of Things) device (110f), and an AI (artificial intelligence) device / server (110g). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle (110b-1, 110b-2) may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device (110c) includes an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The portable device (110d) may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc. The home appliance (110e) may include a TV, a refrigerator, a washing machine, etc. The IoT device (110f) may include a sensor, a smart meter, etc. The wireless device (110) may correspond to a terminal (or first node) or an intermediate point.The network device (120) may correspond to a base station (or second node) or another intermediate point. For example, the network device (120) may also be implemented as a wireless device (110), and a specific wireless device (120a) may act as a network device (120) to another wireless device (110).

[0061] Wireless devices (110a to 110f) can be connected to a network (130) via a network device (120). AI technology can be applied to the wireless devices (110a to 110f), and the wireless devices (110a to 110f) can be connected to an AI server (110g) via a network (130). The network (130) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR), or a 6G network. The wireless devices (110a to 110f) can communicate with each other via the network device (120) / network (130), but can also communicate directly (e.g., sidelink communication) without going through the network device (120) / network (130). For example, vehicles (110b-1, 110b-2) can communicate directly (e.g., V2V (vehicle to vehicle) / V2X (vehicle to everything) communication). Additionally, an IoT device (110f) (e.g., a sensor) can communicate directly with another IoT device (e.g., a sensor) or another wireless device (110a to 110f).

[0062] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (110a to 110f) / network devices (120), network devices (120) / network devices (120). Here, the wireless communication / connection can be established through various wireless access technologies such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between network devices (150c) (e.g., relay, IAB (integrated access backhaul)). Through the wireless communication / connection (150a, 150b, 150c), the wireless device and the network device / wireless device, and the network device and the network device can transmit / receive wireless signals to each other. For example, the wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various descriptions of the present disclosure, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc., may be performed.

[0063] Device applicable to the present disclosure

[0064] FIG. 3 illustrates an example of a wireless device to which some examples of the present disclosure may be applied.

[0065] Referring to FIG. 3, the wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G). The wireless device (200) includes at least one processor (202) and at least one memory (204), and may additionally include at least one transceiver (206) and / or at least one antenna (208).

[0066] 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 operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (206). In addition, the processor (202) may receive a wireless signal including second information / signal via the transceiver (206), and then store information obtained from signal processing of the second information / signal in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may store software code including instructions for performing some or all of the processes controlled by the processor (202), or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology. The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via at least one antenna (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF (radio frequency) unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0067] Hereinafter, the hardware elements of the wireless device (200) will be described in more detail. Although not limited thereto, at least one protocol layer may be implemented by at least one processor (202). For example, at least one processor (202) may implement at least one layer (e.g., a functional layer such as physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), radio resource control (RRC), and service data adaptation protocol (SDAP)). At least one processor (202) may generate at least one Protocol Data Unit (PDU) and / or at least one Service Data Unit (SDU) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. At least one processor (202) may generate a message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. At least one processor (202) can generate a signal (e.g., a baseband signal) comprising a PDU, an SDU, a message, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in this document, and provide the signal to at least one transceiver (206). At least one processor (202) can receive a signal (e.g., a baseband signal) from at least one transceiver (206) and obtain the PDU, SDU, message, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document.

[0068] At least one processor (202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The at least one processor (202) may be implemented by hardware, firmware, software, or a combination thereof. For example, at least one application specific integrated circuit (ASIC), at least one digital signal processor (DSP), at least one digital signal processing device (DSPD), at least one programmable logic device (PLD), or at least one field programmable gate array (FPGA) may be included in the at least one processor (202). The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be included in the at least one processor (202), or may be stored in at least one memory (204) and driven by the at least one processor (202). The descriptions, functions, procedures, suggestions, methods and / or flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions and / or sets of instructions.

[0069] At least one memory (204) can be connected to at least one processor (202) and can store various forms of data, signals, messages, information, programs, codes, instructions and / or commands. The at least one memory (204) can be configured as a read only memory (ROM), a random access memory (RAM), an erasable programmable read only memory (EPROM), a flash memory, a hard drive, a register, a cache memory, a computer readable storage medium and / or a combination thereof. The at least one memory (204) can be located internally and / or externally to the at least one processor (202). In addition, the at least one memory (204) can be connected to the at least one processor (202) via various technologies such as a wired or wireless connection.

[0070] At least one transceiver (206) can transmit user data, control information, wireless signals / channels, etc., mentioned in the methods and / or flowcharts of this document to at least one other device. At least one transceiver (206) can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts disclosed in this document from at least one other device. For example, at least one transceiver (206) can be connected to at least one processor (202) and can transmit and receive wireless signals. For example, at least one processor (202) can control at least one transceiver (206) to transmit user data, control information, or wireless signals to at least one other device. Furthermore, at least one processor (202) can control at least one transceiver (206) to receive user data, control information, or wireless signals from at least one other device. Additionally, at least one transceiver (206) may be connected to at least one antenna (208), and at least one transceiver (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 operational flowcharts disclosed in this document via at least one antenna (208). In this document, at least one antenna may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). At least one transceiver (206) may convert the received wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using at least one processor (202).At least one transceiver (206) may convert user data, control information, wireless signals / channels, etc. processed by at least one processor (202) from a baseband signal to an RF band signal. For this purpose, at least one transceiver (206) may include an (analog) oscillator and / or filter.

[0071] The components of the wireless device described with reference to FIG. 3 may be referred to by different terms in terms of functionality. For example, the processor (202) may be referred to as a control unit, the transceiver (206) as a communication unit, and the memory (204) as a storage unit. In some cases, the communication unit may be used to mean at least a portion of the processor (202) and the transceiver (206).

[0072] The structure of the wireless device described with reference to FIG. 3 can be understood as the structure of at least a portion of various devices. For example, the structure of the wireless device illustrated in FIG. 3 can be at least a portion of various devices described with reference to FIG. 2 (e.g., a robot (110a), a vehicle (110b-1, 110b-2), an XR device (110c), a portable device (110d), a home appliance (110e), an IoT device (110f), an AI device / server (110g)). Furthermore, according to various embodiments, in addition to the components illustrated in FIG. 3, the device may further include other components.

[0073] For example, the device may be a portable device such as a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), or a portable computer (e.g., a laptop, etc.). In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc., an interface unit that includes at least one port for connection with another device (e.g., an audio input / output port, a video input / output port), and an input / output unit for inputting and outputting image information / signals, audio information / signals, data, and / or information input from a user.

[0074] For example, the device may be a mobile device such as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, etc. In this case, the device may further include at least one of a driving unit including at least one of an engine, a motor, a power train, wheels, brakes, and a steering unit of the device, a power supply unit including a wired / wireless charging circuit, a battery, etc. that supplies power, a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, an autonomous driving unit that performs functions such as path maintenance, speed control, and destination setting, and a position measurement unit that obtains location information of the mobile device through a global positioning system (GPS) and various sensors.

[0075] For example, the device may be an XR device such as an HMD, a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc., an input / output unit that obtains control information, data, etc. from the outside and outputs the generated XR object, and a sensor unit that senses status information, environmental information, and user information of the device or the surroundings of the device.

[0076] For example, the device may be a robot that can be classified into industrial, medical, household, military, etc. types depending on the purpose or field of use. In this case, the device may further include at least one of a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, and a driving unit that performs various physical actions, such as moving the robot joints.

[0077] For example, the device may be an AI device such as a TV, a projector, a smartphone, a PC, a laptop, a digital broadcasting terminal, a tablet PC, a wearable device, a set-top box (STB), a radio, a washing machine, a refrigerator, digital signage, a robot, a vehicle, etc. In this case, the device may further include at least one of an input unit that acquires various types of data from the outside, an output unit that generates output related to sight, hearing, or touch, a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, and a training unit that trains a model composed of an artificial neural network using learning data.

[0078] The structure of the wireless device illustrated in FIG. 3 may be understood as a part of a terminal (or first node), or as a part of an intermediate point, or as a part of a base station (or second node). If the device illustrated in FIG. 3 is a base station (or second node), the device may further include a wired transceiver for front haul and / or back haul communications. If the front haul and / or back haul communications are based on wireless communications, at least one transceiver (206) illustrated in FIG. 3 may be used for front haul and / or backhaul communications, and a wired transceiver may not be included.

[0079] Communication procedures

[0080] FIG. 4 exemplarily illustrates a communication procedure between a first node and a second node to which some examples of the present disclosure may be applied.

[0081] FIG. 4 illustrates operations of a first node (110) (e.g., a terminal) and a second node (120) (e.g., a base station) transmitting and / or receiving data and operations performed prior thereto.

[0082] In step S101, the first node (110) and the second node (120) can perform synchronization. For example, the terminal (110) performs an initial cell search operation. Specifically, the terminal (110) can detect at least one synchronization signal transmitted from the base station (120) according to a predefined rule. Here, the synchronization signal can include a plurality of synchronization signals (e.g., a primary synchronization signal, a secondary synchronization signal) classified according to a structure or purpose. Through this, the terminal (110) can confirm the boundaries of the frame, subframe, slot, and / or symbol of the base station (120) and obtain information (e.g., a cell identifier) ​​about the base station (120).

[0083] In step S103, the first node (110) can obtain system information transmitted from the second node (120). For example, the system information is information related to the properties, characteristics, and / or capabilities of the base station (120) required to access the base station (120) and use the service, and can be classified according to the content (e.g., whether it is essential for access), transmission structure (e.g., the channel used, whether it is provided in an on-demand manner), etc., and can be classified into, for example, a master information block (MIB) and a system information block (SIB). If necessary, the terminal (110) can transmit a signal requesting system information before receiving the system information. Such requesting and providing of system information may be performed after a random access procedure described below.

[0084] In step S105, the first node (110) and the second node (120) can perform a random access procedure. For example, the terminal (110) can transmit and / or receive at least one message (e.g., a random access preamble, a random access response (RAR) message, etc.) for a random access procedure based on information related to a random access channel of the base station (120) obtained through system information (e.g., channel position, channel structure, structure of a supported preamble, etc.). For example, the terminal (110) may transmit a preamble (e.g., message 1 (MSG1)) over a random access channel, receive a random access response (RAR) message (e.g., message 2 (MSG2)), transmit a message (e.g., message 3 (MSG3)) including information related to the terminal (110) (e.g., identification information) using scheduling information included in the RAR message to the base station (120), and receive a message for contention resolution and / or connection establishment (e.g., message 4 (MSG4)). As another example, MSG1 and MSG3 may be transmitted and received as one message (e.g., message A (MSG A)), or MSG2 and MSG4 may be transmitted and received as one message (e.g., message B (MSG B)).

[0085] In step S107, the first node (110) and the second node (120) can perform signaling of control information. For example, the control information can be defined in various layers, such as a layer that controls a connection (e.g., a radio resource control (RRC) layer), a layer that handles mapping between logical channels and transmission channels (e.g., a media access control (MAC) layer), and a layer that handles physical channels (e.g., a physical (PHY) layer). For example, the terminal (110) and the base station (120) can perform at least one of signaling for establishing a connection, signaling for determining settings related to communication, and signaling for indicating allocated resources.

[0086] In step S109, the first node (110) and the second node (120) can transmit and / or receive data. For example, the terminal (110) and the base station (120) can process, transmit, and / or receive data based on signaling of control information. For example, when transmitting data, the terminal (110) or the base station (120) can perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and resource mapping on information bits. For example, when receiving data, the terminal (110) or the base station (120) can perform at least one of signal extraction from resources, waveform demodulation for each antenna, signal arrangement considering layer mapping, constellation demapping, descrambling, and channel decoding.

[0087] 6G system core technologies

[0088] As core implementation technologies of the 6G system, technologies such as artificial intelligence (AI), THz (terahertz) communication, optical wireless technology, free space optics (FSO) backhaul network, massive MIMO (multiple input multiple output) technology, blockchain, 3D networking, quantum communication, unmanned aerial vehicles, cell-free communication, wireless information and energy transfer (WIET), integration of sensing and communication, integration of access backhaul networks, holographic beamforming, big data analysis, and large intelligent surface (LIS) can be adopted.

[0089] artificial intelligence

[0090] Incorporating AI into communications can streamline and improve real-time data transmission. AI can use numerous analytics to determine how complex target tasks should be performed. AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handovers, network selection, and resource scheduling can be performed instantly using AI. AI can also play a crucial role in machine-to-machine (M2M), machine-to-human, and human-to-machine communications. Furthermore, AI can facilitate rapid communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0091] FIG. 5 illustrates a functional framework for AI operations to which some examples of the present disclosure may be applied.

[0092] Below, to explain AI (or AI / ML (machine learning)) in more detail, the terms can be defined as follows.

[0093] - Data collection: Data collected from network nodes, management entities, or terminals as a basis for AI model training, data analysis, and inference.

[0094] - AI model: A data-driven algorithm that applies AI technology to generate a set of outputs containing predictive information and / or decision parameters based on a set of inputs.

[0095] - AI / ML training: An online or offline process of training an AI model by learning features and patterns that best represent the data and obtain a trained AI / ML model for inference.

[0096] - AI / ML inference: The process of making predictions or inducing decisions based on collected data and the AI ​​model using a trained AI model.

[0097] Referring to FIG. 5, the data collection function (10) is a function that collects input data and provides processed input data to the model training function (20) and the model inference function (30).

[0098] Examples of input data may include measurements from terminals or other network entities, feedback from actors, and output from AI models.

[0099] The data collection function (10) performs data preparation based on input data and provides input data processed through the data preparation. Here, the data collection function (10) does not perform data preparation specific to each AI algorithm (e.g., data pre-processing and cleaning, formatting, and transformation), but can perform data preparation common to all AI algorithms.

[0100] After the data preparation process is performed, the data collection function (10) may provide training data (11) to the model training function (20) and may provide inference data (12) to the model inference function (30). Here, the training data (11) may correspond to data required as input for the AI ​​model training function (20), and the inference data (12) may correspond to data required as input for the AI ​​model inference function (30).

[0101] The data collection function (10) may be performed by a single entity (e.g., a terminal, a RAN node, a network node, etc.), but may also be performed by multiple entities. In this case, training data (11) and inference data (12) may be provided to the model training function (20) and model inference function (30), respectively, from multiple entities.

[0102] The model training function (20) may correspond to a function that performs AI model training, validation, and testing, which can generate model performance metrics as part of the AI ​​model testing procedure. If necessary, the model training function (20) may also be responsible for data preparation (e.g., data pre-processing and cleaning, formatting, and transformation, etc.) based on training data (11) provided by the data collection function (10).

[0103] Here, model deployment / update (13) can be used to initially deploy a trained, validated and tested AI model to the model inference function (30) or to provide an updated model to the model inference function (30).

[0104] The model inference function (30) may correspond to a function that provides AI model inference output (16) (e.g., prediction or decision). If applicable, the model inference function (30) may provide model performance feedback (14) to the model training function (20). In addition, the model inference function (30) may also be responsible for data preparation (e.g., data pre-processing and cleaning, formatting and transformation, etc.) based on inference data (12) provided by the data collection function (10), if necessary.

[0105] Here, output (16) refers to the inference output of the AI ​​model generated by the model inference function (30), and the details of the inference output may vary depending on the use case.

[0106] Model performance feedback (14) can be used to monitor the performance of the AI ​​model, if available, and this feedback may be omitted.

[0107] An actor function (40) is a function that receives an output (16) from a model inference function (30) and triggers or performs a corresponding task / action. The actor function (40) can trigger tasks / actions for other entities (e.g., one or more terminals, one or more RAN nodes, one or more network nodes, etc.) or for itself.

[0108] Feedback (15) can be used to derive training data (11), inference data (12), or to monitor the performance of the AI ​​model, its impact on the network, etc.

[0109] Meanwhile, the definitions of training / validation / test in data sets used in AI / ML can be distinguished as follows.

[0110] - Training data: refers to a data set for learning a model.

[0111] - Validation data: This refers to a dataset used to validate a model that has already completed training. Validation data can typically be used to prevent overfitting of the training data set. It can also be used to select the best model among the various models learned during the training process. Therefore, validation can be considered a type of learning.

[0112] - Test data: This refers to the data set for final evaluation. This data is unrelated to learning.

[0113] For example, the training and validation data can be divided into an 8:2 or 7:3 ratio within the entire data set. Alternatively, the training data:validation data:test data can be divided into a 6:2:2 ratio within the entire data set.

[0114] The level of cooperation can be defined as follows depending on whether the base station and the terminal have capabilities for AI / ML functions, and variations due to combination of multiple levels or separation of any one level are also possible.

[0115] Category 0a: This category corresponds to a no-collaboration framework. In this case, AI / ML algorithms are purely implementation-based and may not require any changes to the wireless interface.

[0116] Category 0b: Frameworks that involve a wireless interface modified to fit efficient implementation-based AI / ML algorithms, but without collaboration.

[0117] Category 1: This category applies to cases where inter-node support is required to improve the AI / ML algorithms of each node. For example, this applies when a terminal receives support from a base station (for training, adaptation, etc.), and vice versa. At this level, model exchange between network nodes is not required.

[0118] Category 2: This applies to cases where joint ML tasks can be performed between terminals and base stations. This level requires exchange of AI / ML model commands or network nodes.

[0119] The functions exemplified in FIG. 5 above may be implemented in a RAN node (e.g., a base station, a TRP, a CU of a base station, etc.), a network node, an OAM (operation administration maintenance) of a network operator, or a terminal.

[0120] Alternatively, two or more entities, such as a RAN, a network node, a network operator's OAM, or a terminal, may cooperate to implement the functions illustrated in FIG. 5. For example, one entity may perform some of the functions of FIG. 5, and another entity may perform the remaining functions. In this way, since some of the functions illustrated in FIG. 5 are performed by a single entity (e.g., a terminal, a RAN node, a network node, etc.), the transmission / provision of data / information between each function may be omitted. For example, if the model training function (20) and the model inference function (30) are performed by the same entity, the transmission / provision of model deployment / update (13) and model performance feedback (14) may be omitted.

[0121] Alternatively, any one of the functions illustrated in FIG. 5 may be performed collaboratively by two or more entities, including a RAN, a network node, a network operator's OAM, or a terminal. This may be referred to as a split AI operation.

[0122] FIG. 6 illustrates an example of operations related to AI model training and AI model inference to which some examples of the present disclosure may be applied.

[0123] For example, the AI ​​model training function may be performed by a network node (e.g., a core network node, an OAM of a network operator, etc.), and the AI ​​model inference function may be performed by a RAN node (e.g., a base station, a TRP, a CU of a base station, etc.).

[0124] Step 1: RAN node 1 and RAN node 2 can transmit input data (e.g., training data) for AI model training to the network node. Here, RAN node 1 and RAN node 2 can also transmit data collected from the terminal (e.g., terminal measurements related to RSRP (reference signal received power), RSRQ (reference signal received quality), SINR (signal to interference-plus-noise ratio) of the serving cell and neighboring cells, terminal location, speed, etc.) to the network node.

[0125] Step 2: Network nodes can train AI models using the received training data.

[0126] Step 3: The network node may distribute / update the AI ​​model to RAN node 1 and / or RAN node 2. RAN node 1 (and / or RAN node 2) may also continue model training based on the received AI model.

[0127] For convenience of explanation, we assume that the AI ​​model is deployed / updated only to RAN node 1.

[0128] Step 4: RAN node 1 can receive input data (e.g., inference data) for AI model inference from the terminal and RAN node 2.

[0129] Step 5: RAN node 1 can perform AI model inference using the received inference data to generate output data (e.g., prediction or decision).

[0130] Step 6: If applicable, RAN node 1 may send model performance feedback to the network nodes.

[0131] Step 7: RAN node 1, RAN node 2, and the terminal (or 'RAN node 1 and the terminal', or 'RAN node 1 and RAN node 2') may perform actions based on the output data. For example, in the case of a load balancing operation, the terminal may move from RAN node 1 to RAN node 2.

[0132] Step 8: RAN node 1 and RAN node 2 can transmit feedback information to the network nodes.

[0133] FIG. 7 illustrates another example of operations related to AI model training and AI model inference to which some examples of the present disclosure may be applied.

[0134] For example, both AI model training functions and AI model inference functions can be performed by RAN nodes (e.g., base stations, TRPs, CUs of base stations, etc.).

[0135] Step 1: The terminal and RAN node 2 can transmit input data (e.g., training data) for AI model training to RAN node 1.

[0136] Step 2: RAN node 1 can train an AI model using the received training data.

[0137] Step 3: RAN node 1 can receive input data (e.g., inference data) for AI model inference from the terminal and RAN node 2.

[0138] Step 4: RAN node 1 can perform AI model inference using the received inference data to generate output data (e.g., prediction or decision).

[0139] Step 5: RAN node 1, RAN node 2, and the terminal (or 'RAN node 1 and the terminal', or 'RAN node 1 and RAN node 2') may perform actions based on the output data. For example, in the case of a load balancing operation, the terminal may move from RAN node 1 to RAN node 2.

[0140] Step 6: RAN node 2 may transmit feedback information to RAN node 1.

[0141] FIG. 8 illustrates another example of operations related to AI model training and AI model inference to which some examples of the present disclosure may be applied.

[0142] For example, the AI ​​model training function may be performed by a RAN node (e.g., a base station, a TRP, a CU of a base station, etc.), and the AI ​​model inference function may be performed by a terminal.

[0143] Step 1: The terminal may transmit input data (e.g., training data) for AI model training to the RAN node. Here, the RAN node may collect data (e.g., terminal measurements related to RSRP, RSRQ, SINR of the serving cell and neighboring cells, terminal location, speed, etc.) from various terminals and / or from other RAN nodes.

[0144] Step 2: RAN nodes can train AI models using the received training data.

[0145] Step 3: The RAN node can distribute / update the AI ​​model to the terminal. The terminal can also continue model training based on the received AI model.

[0146] Step 4: Input data (e.g., inference data) for AI model inference can be received from the terminal and RAN node (and / or from another terminal).

[0147] Step 5: The terminal can perform AI model inference using the received inference data to generate output data (e.g., prediction or decision).

[0148] Step 6: If applicable, the terminal may send model performance feedback to the RAN node.

[0149] Step 7: The terminal and RAN node can perform actions based on the output data.

[0150] Step 8: The terminal may transmit feedback information to the RAN node.

[0151] THz communication (terahertz communication)

[0152] Data transmission rates can be increased by increasing bandwidth. This can be achieved by utilizing sub-THz communications with wide bandwidths and applying advanced massive MIMO technology. THz waves, also known as sub-millimeter waves, typically refer to the frequency range between 0.1 THz and 10 THz, with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz to 300 GHz band (the sub-THz band) is considered a key part of the THz spectrum for cellular communications. Adding the sub-THz band to the mmWave band will increase 6G cellular capacity. Among the defined THz bands, 300 GHz to 3 THz lies in the far infrared (IR) frequency band. While part of the optical band, the 300 GHz to 3 THz band lies at the boundary of the optical band, immediately following the RF band. Therefore, this 300 GHz to 3 THz band exhibits similarities to RF.

[0153] FIG. 9 illustrates an electromagnetic spectrum to which some examples of the present disclosure may be applied.

[0154] Key characteristics of THz communications include (i) the widely available bandwidth to support very high data rates, and (ii) the high path loss at high frequencies (which necessitates highly directional antennas). The narrow beamwidths generated by highly directional antennas reduce interference. The small wavelength of THz signals allows for a significantly larger number of antenna elements to be integrated into devices and base stations operating in this band. This enables the use of advanced adaptive array technologies to overcome range limitations.

[0155] Transmitting system information (e.g., MIB) in a cell in the THz frequency band can be inefficient because the beam width in high-frequency bands narrows, requiring more beam sweeps to cover the entire cell area. This method is particularly inefficient when there are only a few users within the cell.

[0156] FIG. 10 illustrates an example of a system information transmission / reception procedure to which some examples of the present disclosure may be applied.

[0157] The example of Fig. 10 is applicable not only to THz communication environments but also to 6G communication environments where THz communication is not applicable. Furthermore, the procedure illustrated in Fig. 10 can be combined with various embodiments of the present disclosure described below. For example, the embodiments described below can be performed based on system information acquired through the procedure illustrated in Fig. 10.

[0158] In step S1010, the second node (120) (e.g., base station) can transmit system information of cell #1 via cell #2. For example, the base station provides at least two cells, cell #1 uses a THz frequency band, and cell #2 uses a frequency band other than the THz frequency band. Here, the system information may include at least one of an SFN (system frame number), a PDCCH configuration for SIB1, cell barring, cell re-selection, and subcarrier spacing generated in a higher layer, and may include at least one of an SFN, a half frame indicator, and an SSB index (synchronization signal / PBCH (physical broadcast channel) block index) generated in a physical layer. For this purpose, as an example, cell #1 and cell #2 may have a relationship of a secondary cell and a primary cell.

[0159] At step S1030, the first node (110) (e.g., terminal) can acquire synchronization for cell #1. Synchronization can be acquired by detecting a synchronization signal. Typically, synchronization is acquired before receiving system information, but since the system information for cell #1 is received from cell #2, synchronization acquisition for cell #1 can be performed after receiving the system information. For example, the terminal can acquire synchronization based on the system information. Alternatively, synchronization acquisition can be performed before step S1010.

[0160] At step S1050, the first node (110) may transmit a signal for accessing cell #1. For example, the signal may include a random access preamble. The structure of this signal and the resources (e.g., channels) for transmitting the signal may be identified through system information. Thereafter, at step S1070, the first node (110) and the second node (120) may perform an access procedure for cell #1 and communicate.

[0161] The procedure described with reference to FIG. 10 may be performed when the first node (110) initially connects to cell #1 of the second node (120). Alternatively, a similar procedure may be performed when the first node (110) hands over to cell #1 of the second node (120). However, in the case of handover, the system information of cell #1 may be received from a cell of a base station other than cell #2 of the second node (120).

[0162] Communications in the THz band are expected to experience extremely severe path loss, and to overcome this, terminals and base stations may be required to use very sharp beams. The use of sharp beams means that terminals and base stations must perform beam control in addition to beamforming, and the number of beams used increases significantly. Consequently, it takes a very long time to align the transmit and receive beams between the base station and terminals. Furthermore, if the beam alignment between the base station and terminals is misaligned due to movement or movement of the terminals, frequent re-alignment of the beams may be required, resulting in link instability.

[0163] FIG. 11 exemplarily illustrates a beam management procedure to which some examples of the present disclosure may be applied.

[0164] Although FIG. 11 illustrates an example of a procedure for searching and / or selecting beams for THz communication, this procedure is not limited to a THz environment and can also be applied to a 6G communication environment where THz communication is not applied.

[0165] Here, beam may be interpreted as other terms having equivalent technical meanings that can distinguish beams, such as 'spatial domain filter', 'spatial domain transmit filter', 'spatial domain receive filter', reference signal (RS) resource that distinguishes beams, SSB index, etc.

[0166] In step S1110, the second node (120) (e.g., base station) can set resources for beam management to the first node (110) (e.g., terminal). Here, the resources can include at least one of time-frequency resources, channels, and spatial resources (e.g., antenna ports). For example, the base station can utilize a beam search signal (BSS) that is transmitted spatially separated from an existing downlink signal / channel for beam search. Here, the BSS can be transmitted based on a dedicated port for beam search. The dedicated port can be a different port from a port for transmitting an existing downlink signal / channel (e.g., SSB, PDSCH (physical downlink shared channel), etc.). BSS is a term defined for convenience of explanation, and the technical concept according to the present embodiment is not limited to the term BSS itself. For example, a signal transmitted based on a dedicated port defined / set for beam search can be included in the technical concept according to the present embodiment.

[0167] In step S1130, the second node (120) (e.g., base station) transmits measurement signals using a plurality of transmission beams. For example, the measurement signals may include at least one of a reference signal and a synchronization signal. At this time, the measurement signals may be transmitted as many times as the number of beams that require measurement, and may also be transmitted in a multi-beam transmission method that forms a plurality of beams simultaneously to reduce sweeping time. Here, the multi-beam transmission may be performed based on at least one of a multi-panel, a sub-array, and a true time delay (TTD).

[0168] At step S1150, a first node (110) (e.g., a terminal) may transmit a feedback signal to a second node (120) (e.g., a base station). The feedback signal may indicate at least one beam selected by the terminal. The terminal may select at least one preferred beam based on the measurement signals received at step S1130.

[0169] In step S1170, the first node (110) and the second node (120) can perform communication. For example, the second node (120) can perform transmission to the first node (110) using the reception beam of the first node (110) selected in step S1150. If channel reciprocity is established, the transmission beam of the first node (110) can also be determined through steps S1130 and S1150, so that the transmission operation from the first node (110) can also be performed using a beam that has a reciprocal relationship with the beam selected in step S1150. If channel reciprocity is not established, a procedure including transmission of measurement signal(s) by the first node (110) and transmission of feedback signal(s) by the second node (120) may be performed first to determine the transmission beam of the first node (110).

[0170] non-terrestrial networks (NTN)

[0171] Figures 12 and 13 illustrate examples of NTN scenarios to which some examples of the present disclosure may be applied.

[0172] NTN can represent a network or network segment that uses radio frequency (RF) resources mounted on a satellite (or unmanned aerial system (UAS) platform).

[0173] Figure 12 shows an example of a typical scenario of NTN based on transparent payload, and Figure 13 shows an example of a typical scenario of NTN based on regenerative payload.

[0174] Referring to Figure 12, a satellite (or UAS platform) can establish a service link with a terminal. The satellite (or UAS platform) can be connected to a gateway via a feeder link. The satellite can be connected to a data network via the gateway. The beam footprint can refer to the area where the signal transmitted by the satellite can be received.

[0175] Referring to Figure 13, a satellite (or UAS platform) can establish a service link with a terminal. A satellite (or UAS platform) connected to a terminal can be connected to another satellite (or UAS platform) via an inter-satellite link (ISL). The other satellite (or UAS platform) can be connected to a gateway via a feeder link. Based on the regenerated payload, the satellite can be connected to a data network through another satellite and the gateway. If an ISL does not exist between the satellite and another satellite, a feeder link between the satellite and the gateway may be required.

[0176] Figures 12 and 13 are merely examples of NTN scenarios, and NTN can be implemented based on various scenarios. For example, a satellite (or UAS platform) can implement a transparent or regenerative (e.g., with onboard processing) payload. For example, a satellite (or UAS platform) can generate multiple beams across a designated service area depending on the field of view of the satellite (or UAS platform). For example, the field of view of the satellite (or UAS platform) can vary depending on the onboard antenna diagram and minimum elevation angle.

[0177] For example, a transparent payload may include radio frequency filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may remain unchanged.

[0178] For example, a regenerative payload may include radio frequency filtering, frequency conversion and amplification, demodulation / decoding, switching and / or routing, and coding / modulation. For example, a regenerative payload may be substantially equivalent to mounting all or part of a base station function on a satellite (or UAS platform).

[0179] Integrated Sensing and Communication (ISAC)

[0180] Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (or range) of an object, and thus obtain information about the characteristics of the environment and / or objects within the environment. Because radio frequency sensing does not require a networked device to connect to the object, it can provide a service for object positioning without a device. The ability to obtain range, velocity, and angle information from radio frequency signals can enable a wide range of new capabilities, such as various object detection, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to a variety of industries (e.g., drones, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can utilize non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of wireless sensing services, such as sensing operations, may depend on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing offers an opportunity to enhance existing communication systems from a communications network to a wireless communication and sensing network.

[0181] FIG. 14 illustrates examples of sensing operations to which some examples of the present disclosure may be applied.

[0182] Specifically, Fig. 14(a) shows an example of a monostatic sensing operation using a sensing receiver and a sensing transmitter located in the same location. Fig. 14(b) shows an example of a bistatic sensing operation using a sensing receiver and a sensing transmitter located in separate locations. A sensing signal transmitted from a sensing transmitter is reflected / scattered by a sensing object, and the sensing receiver can receive the signal, and extract / obtain sensing data based on the received signal. A sensing result can be generated / determined through appropriate processing of the sensing data. The sensing result can be provided to a trusted third-party entity / service outside the 3GPP system through an entity / service within the 3GPP system.

[0183] Actions related to multiple TRP (M-TRP)

[0184] FIG. 15 illustrates a multi-TRP transmission method in a wireless communication system to which the present disclosure can be applied.

[0185] Referring to (a) of Fig. 15, it shows a case where a layer group transmitting the same codeword (CW) / transport block (TB) corresponds to different TRPs. In this case, the layer group may refer to a predetermined layer set consisting of one or more layers. In this case, the amount of transmission resources increases due to the large number of layers, which has the advantage of enabling the use of robust channel coding with a low code rate for TB. In addition, since the channels are different from multiple TRPs, the reliability of the received signal can be expected to be improved based on the diversity gain.

[0186] Referring to (b) of Fig. 15, an example of transmitting different CWs through layer groups corresponding to different TRPs is shown. At this time, it can be assumed that the TBs corresponding to CW #1 and CW #2 in the figure are the same. That is, CW #1 and CW #2 mean that the same TB is converted into different CWs through channel coding, etc. by different TRPs, respectively. Therefore, it can be viewed as an example of repeated transmission of the same TB. In the case of Fig. 15 (b), compared to Fig. 15 (a), it may have a disadvantage in that the code rate corresponding to the TB is high. However, it has an advantage in that the code rate can be adjusted or the modulation order of each CW can be adjusted by indicating different RV (redundancy version) values ​​for encoded bits generated from the same TB depending on the channel environment.

[0187] According to the method exemplified in (a) and (b) of Fig. 15, the same TB is repeatedly transmitted through different layer groups, and since each layer group is transmitted by a different TRP / panel, the data reception probability of the terminal can be increased. This is referred to as an SDM (Spatial Division Multiplexing)-based M-TRP URLLC transmission method. Layers belonging to different layer groups are transmitted through DMRS ports belonging to different DMRS CDM groups.

[0188] In addition, although the above-described multiple TRP related content was explained based on the SDM (spatial division multiplexing) method using different layers, it can be extended and applied to the FDM (frequency division multiplexing) method based on different frequency domain resources (e.g., RB / PRB (set) etc.) and / or the TDM (time division multiplexing) method based on different time domain resources (e.g., slots, symbols, sub-symbols etc.).

[0189] Regarding the techniques for multi-TRP based URLLC scheduled by a single DCI, the following techniques are being discussed.

[0190] 1) Technique 1 (SDM): Time and frequency resource allocation overlap, and n (n<=Ns) TCI states within a single slot.

[0191] 1-a) Technique 1a

[0192] - At each transmission occasion, the same TB is transmitted in one layer or set of layers, and each layer or set of layers is associated with one TCI and one set of DMRS port(s).

[0193] - A single codeword with a single RV is used across all spatial layers or across a set of layers. From the UE perspective, different coded bits are mapped to different layers or sets of layers using the same mapping rule.

[0194] 1-b) Technique 1b

[0195] - At each transmission occasion, the same TB is transmitted in one layer or set of layers, and each layer or set of layers is associated with one TCI and one set of DMRS port(s).

[0196] - A single codeword with one RV is used for each spatial layer or set of layers. The RV(s) corresponding to each spatial layer or set of layers may be the same or different.

[0197] 1-c) Technique 1c

[0198] - At one transmission occasion, the same TB having one DMRS port associated with multiple TCI state indices is transmitted in one layer, or the same TB having multiple DMRS ports that are one-to-one associated with multiple TCI state indices is transmitted in one layer.

[0199] For techniques 1a and 1c above, the same MCS is applied to all layers or a set of all layers.

[0200] 2) Technique 2 (FDM): Frequency resource allocation does not overlap, and there are n (n<=Nf) TCI states in a single slot.

[0201] - Each non-overlapping frequency resource allocation is associated with one TCI state.

[0202] - The same single / multiple DMRS port(s) are associated with all non-overlapping frequency resource allocations.

[0203] 2-a) Technique 2a

[0204] - A single codeword with a single RV is used for all resource allocations. From the UE perspective, common RB matching (mapping of codewords to layers) is applied to all resource allocations.

[0205] 2-b) Technique 2b

[0206] - A single codeword with a single RV is used for each non-overlapping frequency resource allocation. The RVs corresponding to each non-overlapping frequency resource allocation may be the same or different.

[0207] As for technique 2a above, the same MCS is applied to all non-overlapping frequency resource allocations.

[0208] 3) Technique 3 (TDM): Time resource allocation does not overlap, and n (n<=Nt1) TCI states within a single slot.

[0209] - Each transmission occasion of a TB has one TCI and one RV with a time granularity of mini-slots.

[0210] - A common MCS is used for all transmission occasions within a slot, either single or multiple DMRS port(s).

[0211] - RV / TCI can be the same or different at different transmission occasions.

[0212] 4) Technique 4 (TDM): n (n<=Nt2) TCI states in K (n<=K) different slots

[0213] - Each transmission occasion of TB has one TCI and one RV.

[0214] - All transmission occasions across K slots use a common MCS to single or multiple DMRS port(s).

[0215] - RV / TCI can be the same or different at different transmission occasions.

[0216] Downlink multi-TRP (M-TRP) URLLC transmission operation

[0217] DL M-TRP URLLC transmission method refers to a method in which multiple TRPs transmit the same data / DCI using different space (e.g., layer / port) / time / frequency resources. For example, TRP 1 can transmit specific data / DCI in resource 1, and TRP 2 can transmit the specific data / DCI (i.e., the same data / DCI) in resource 2.

[0218] That is, when the DL M-TRP URLLC transmission method is set, the terminal can receive the same data / DCI using different space / time / frequency resources. At this time, the terminal can receive an indication from the base station regarding the QCL RS / type (i.e., DL TCI state) used in the space / time / frequency resources for receiving the corresponding data / DCI.

[0219] For example, if the corresponding data / DCI is received from resource 1 and resource 2, the terminal can be instructed by the base station about the DL TCI state used in resource 1 and the DL TCI state used in resource 2. By receiving the corresponding data / DCI through resource 1 and resource 2, high reliability can be achieved. This M-TRP URLLC transmission method can be applied to PDSCH / PDCCH.

[0220] UL M-TRP URLLC transmission method refers to a method in which multiple TRPs receive the same data / UCI from a terminal using different space / time / frequency resources. For example, TRP 1 can receive the same data / UCI from a terminal on resource 1, and TRP 2 can receive the same data / UCI from a terminal on resource 2. In addition, TRP 1 and TRP 2 can share the data / UCI received from the terminal through a backhaul link (connected between TRPs).

[0221] That is, when the UL M-TRP URLLC transmission method is set, the terminal can transmit the same data / UCI to each TRP using different space / time / frequency resources. At this time, the terminal can be instructed by the base station about the Tx beam and Tx power (i.e., UL TCI state) to be used in the space / time / frequency resources for transmitting the same data / UCI. For example, when the same data / UCI is transmitted in resource 1 and resource 2, the terminal can be instructed by the base station about the UL TCI state used in resource 1 and the UL TCI state used in resource 2. This UL M-TRP URLLC can be applied to PUSCH / PUCCH.

[0222] In addition, in describing the present disclosure, when receiving / transmitting data / DCI / UCI through specific space / time / frequency resources, using (or mapping) a specific TCI state (or TCI) may mean, in the case of DL, estimating a channel from a DMRS using a QCL type and QCL RS indicated by the specific TCI state in the specific space / time / frequency resources, and receiving / demodulating data / DCI / UCI with the estimated channel.

[0223] And, when receiving / transmitting data / DCI / UCI through specific space / time / frequency resources, using (or mapping) a specific TCI state (or TCI) may mean, in the case of UL, transmitting / modulating DMRS and data / UCI using a Tx beam and / or Tx power indicated by a specific TCI state in a specific space / time / frequency resource.

[0224] In addition, the UL TCI state may include Tx beam or Tx power information of the terminal. In addition, the base station may set other parameters, such as spatial relation information, for the terminal instead of the TCI state.

[0225] For example, the UL TCI state can be directly indicated to the UE via the UL grant DCI. Alternatively, the UL TCI state can mean spatial relationship information of SRS resources indicated via the SRI (SRS resource indicator) field of the UL grant DCI. Alternatively, the UL TCI state can mean an open loop (OP) Tx power control parameter linked to a value indicated via the SRI field of the UL grant DCI.

[0226] Here, the OL Tx power control parameters may include, for example, j (index for OP parameter(s) Po and alpha (set of up to 32 parameter values ​​per cell), q_d (index of DL RS resources for path loss (PL) measurement (up to 4 measurements per cell), or / and I (closed-loop power control process index (up to 2 processes per cell)).

[0227] In another embodiment of the present disclosure, the M-TRP eMBB transmission method refers to a method in which M-TRP transmits different data / DCI using different space / time / frequency resources. When the M-TRP eMBB transmission method is set, the terminal can receive indications of multiple TCI states from the base station through DCI, and can assume that the data received using the QCL RS indicated by each of the multiple TCI states are different data.

[0228] In addition, since the RNTI for M-TRP URLLC and the M-TRP eMBB RNTI are used separately, the terminal can determine whether a specific transmission / reception is an M-TRP URLLC transmission / reception or an M-TRP eMBB transmission / reception. For example, if the RNTI for URLLC is used and CRC masking is performed on the DCI, the terminal can determine the corresponding transmission as a URLLC transmission. In addition, if the RNTI for eMBB is used and CRC masking is performed on the DCI, the terminal can determine the corresponding transmission as an eMBB transmission. As another example, the base station can set the M-TRP URLLC transmission / reception method or the M-TRP eMBB transmission / reception method to the terminal through new signaling.

[0229] For the convenience of explanation of the present disclosure, it is assumed that two TRPs cooperate with each other to perform transmission / reception operations, but this is not limited thereto. That is, the present disclosure can be expanded to a multi-TRP environment of three or more, and can also be expanded to an environment in which transmission / reception is performed using different panels or beams in the same TRP. A terminal can recognize different TRPs as having different TCI states. When a terminal transmits / receives data / DCI / UCI using TCI state 1, it means that it transmits / receives data / DCI / UCI / from TRP 1 (or to TRP 1).

[0230] The present disclosure can be utilized in situations where M-TRPs perform cooperative transmission of PDCCHs (repeatedly transmitting the same PDCCH or transmitting it in segments). Furthermore, the present disclosure can also be utilized in situations where M-TRPs perform cooperative transmission of PDSCHs or cooperative reception of PUSCHs / PUCCHs.

[0231] Additionally, in describing the present disclosure, the meaning that multiple base stations (i.e., M-TRPs) repeatedly transmit the same PDCCH may mean that the same DCI is transmitted through multiple PDCCH candidates, and is the same as the meaning that multiple base stations repeatedly transmit the same DCI. Here, two DCIs having the same DCI format / size / payload can be viewed as the same DCI.

[0232] Alternatively, if the scheduling results are the same even though the payloads of two DCIs are different, the two DCIs can be considered the same DCI. For example, the time domain resource allocation (TDRA) field of a DCI can relatively determine the slot / symbol positions of data and the slot / symbol positions of A(ACK) / N(NACK) based on the time of reception of the DCI.

[0233] At this time, if the DCI received at point n and the DCI received at point n+1 indicate the same scheduling result to the terminal, the TDRA fields of the two DCIs will be different, and as a result, the DCI payloads will be different. Therefore, even if the payloads of the two DCIs are different, if the scheduling results are the same, the two DCIs can be viewed as the same DCI. Here, the number of repetitions R can be directly indicated by the base station to the terminal or can be mutually agreed upon.

[0234] Alternatively, even if the payloads of two DCIs are different and the scheduling results are not identical, if the scheduling result of one DCI is a subset of the scheduling result of the other DCI, the two DCIs can be considered the same DCI.

[0235] For example, if the same data is TDM-transmitted repeatedly N times, DCI 1 received before the first data indicates (or schedules) data repetition N times, and DCI 2 received before the second data indicates data repetition (scheduling) N-1 times. At this time, the scheduling result (or data) of DCI 2 becomes a subset of the scheduling result (or data) of DCI 1, and both DCIs have scheduling results for the same data. Therefore, in this case as well, the two DCIs can be viewed as the same DCI.

[0236] And, in explaining the present disclosure, multiple base stations (i.e., M-TRPs) dividing and transmitting the same PDCCH may mean transmitting one DCI through one PDCCH candidate, with TRP 1 transmitting some resources defined for the PDCCH candidate and TRP 2 transmitting the remaining resources.

[0237] For example, if TRP 1 and TRP 2 divide and transmit PDCCH candidates corresponding to aggregation levels m1 + m2, the PDCCH candidates are divided into PDCCH candidate 1 corresponding to aggregation level m1 and PDCCH candidate 2 corresponding to aggregation level m2, and TRP 1 can transmit PDCCH candidate 1 and TRP 2 can transmit PDCCH candidate 2. At this time, TRP 1 and TRP 2 can transmit PDCCH candidate 1 and PDCCH candidate 2 using different time / frequency resources. After receiving PDCCH candidate 1 and PDCCH candidate 2, the terminal can generate a PDCCH candidate corresponding to aggregation level m1 + m2 and attempt DCI decoding.

[0238] At this time, the method of dividing the same DCI and transmitting it to multiple PDCCH candidates can be implemented in the following two ways.

[0239] The first method is a method in which a DCI payload (e.g., control information + CRC) is encoded through a single channel encoder (e.g., a polar encoder) and transmitted by dividing it into two TRPs. In other words, the first method means a method in which the coded bits obtained according to the encoding result are divided and transmitted into the two TRPs. Here, the entire DCI payload may be encoded in the coded bits transmitted by each TRP, but this is not limited, and only a portion of the DCI payload may be encoded.

[0240] The second method divides the DCI payload (e.g., control information + CRC) into two DCIs (e.g., DCI 1 and DCI 2), and then encodes each of them using a channel encoder (e.g., a polar encoder). Then, each of the two TRPs can transmit the coded bits corresponding to DCI 1 and the coded bits corresponding to DCI 2 to the terminal.

[0241] That is, the fact that multiple base stations (M-TRPs) divide / repeat the same PDCCH and transmit it over multiple MOs (monitoring occasions) can mean 1) repeatedly transmitting coded bits encoding the entire DCI content of the corresponding PDCCH through each MO for each base station (S-TRP), 2) dividing the coded bits encoding the entire DCI content of the corresponding PDCCH into multiple parts, and transmitting different parts through each MO for each base station (S-TRP), or 3) dividing the DCI content of the corresponding PDCCH into multiple parts, encoding different parts for each base station (S-TRP) (i.e., separate encoding), and transmitting them through each MO.

[0242] Repeated / divided transmission of PDCCH can be understood as transmitting PDCCH multiple times over multiple TOs (transmission occasions).

[0243] Here, TO may refer to a specific time and / or frequency resource unit in which the PDCCH is transmitted. For example, if the PDCCH is transmitted multiple times (in a specific RB) across slots 1, 2, 3, and 4, TO may refer to each slot. As another example, if the PDCCH is transmitted multiple times (in a specific slot) across RB sets 1, 2, 3, and 4, TO may refer to each RB set. As another example, if the PDCCH is transmitted multiple times across different times and frequencies, TO may refer to each time / frequency resource. In addition, the TCI state used for DMRS channel estimation may be set differently for each TO, and TOs with different TCI states may be assumed to have been transmitted by different TRPs / panels.

[0244] Repeated or divided transmission of a PDCCH by multiple base stations means that the PDCCH is transmitted across multiple TOs, and the union of the TCI states set for the TOs consists of two or more TCI states. For example, if a PDCCH is transmitted across TOs 1, 2, 3, and 4, TCI states 1, 2, 3, and 4 may be set for TOs 1, 2, 3, and 4 respectively, which means that TRP i cooperatively transmitted the PDCCH on TO i.

[0245] In describing the present disclosure, when a terminal repeatedly transmits the same PUSCH to multiple base stations (i.e., M-TRP), it may mean that the terminal transmits the same data through multiple PUSCHs, and each PUSCH may be transmitted in an optimized manner on an UL channel of a different TRP.

[0246] For example, a terminal may repeatedly transmit the same data through PUSCH 1 and PUSCH 2. At this time, PUSCH 1 is transmitted using UL TCI state 1 for TRP 1, and link adaptation such as precoder / MCS may also be scheduled with a value optimized for the channel of TRP 1, and the PUSCH may be transmitted. PUSCH 2 is transmitted using UL TCI state 2 for TRP 2, and link adaptation such as precoder / MCS may also be scheduled with a value optimized for the channel of TRP 2, and the PUSCH may be transmitted. At this time, PUSCH 1 and PUSCH 2 that are repeatedly transmitted may be transmitted at different times and may be TDM, FDM, or SDM.

[0247] In addition, in explaining the present disclosure, the fact that a terminal divides the same PUSCH into multiple base stations (i.e., M-TRPs) and transmits it may mean that one data is transmitted through one PUSCH, but resources allocated to the PUSCH are divided and transmitted in an optimized manner on UL channels of different TRPs.

[0248] For example, a terminal can transmit the same data through a 10-symbol PUSCH. At this time, the first 5 symbols of the 10 symbols can be transmitted using UL TCI state 1 for TRP 1, and the terminal can transmit the 5-symbol PUSCH (as TRP 1) by scheduling a value optimized for the channel of TRP 1, such as a precoder / MCS, for link adaptation. The remaining 5 symbols can be transmitted using UL TCI state 2 for TRP 2, and the terminal can transmit the remaining 5-symbol PUSCH (as TRP 2) by scheduling a value optimized for the channel of TRP 2, such as a precoder / MCS, for link adaptation.

[0249] In the above example, a method of dividing one PUSCH into time resources and performing TDM for transmission toward TRP 1 and transmission toward TRP 2 was described, but the present disclosure is not limited thereto, and a terminal can divide the same PUSCH and transmit it to multiple base stations by using the FDM / SDM method.

[0250] A terminal can repeatedly transmit a PUCCH to multiple base stations (similar to PUSCH transmission) or divide and transmit the same PUCCH.

[0251] And, when multiple TOs are indicated to a UE in order to repeatedly transmit or divide PDCCH / PDSCH / PUSCH / PUCCH, each TO can transmit UL toward a specific TRP or receive DL from a specific TRP. At this time, the UL TO transmitted toward TRP 1 (or TO of TRP 1) may mean a TO that uses the first value among two spatial relations, two UL TCIs, two UL power control parameters, or two PL (pathloss)-RSs indicated to the UE. And, the UL TO transmitted toward TRP 2 (or TO of TRP 2) means a TO that uses the second value among two spatial relations, two UL TCIs, two UL power control parameters, and two PL-RSs indicated to the UE.

[0252] Similarly, in DL transmission, the DL TO transmitted by TRP 1 (or TO of TRP 1) may mean a TO that uses the first value among the two DL TCI states indicated to the terminal (for example, when two TCI states are set in CORESET), and the DL TO transmitted by TRP 2 (or TO of TRP 2) may mean a TO that uses the second value among the two DL TCI states indicated to the terminal (for example, when two TCI states are set in CORESET).

[0253] The present disclosure can be extended to various channels, such as PUSCH / PUCCH / PDSCH / PDCCH. Furthermore, the present disclosure can be extended to both cases where the channels are repeatedly transmitted on different space / time / frequency resources and cases where the channels are transmitted in segmented manner.

[0254] In addition, from the perspective of DCI transmission, the M-TRP transmission method can be divided into i) M-TRP transmission method based on M-DCI (multiple DCI) in which each TRP transmits a different DCI, and ii) M-TRP transmission method based on S-DCI (single DCI) in which one TRP transmits a DCI. For example, in the case of S-DCI, all scheduling information for data transmitted by an M-TRP must be transmitted through a single DCI, so it can be used in an ideal BH (ideal BackHaul) environment in which dynamic cooperation between two TRPs is possible.

[0255] Enhanced M-TRP transmission and reception

[0256] In relation to M-TRP transmission and reception in Rel-16 NR standardization, PDSCH transmission and reception according to S-DCI-based M-TRP transmission method and M-DCI-based M-TRP transmission method are supported.

[0257] First, we will look at the S-DCI-based M-TRP PDSCH transmission method.

[0258] S-DCI-based M-TRP PDSCH transmission can use one of SDM / FDM / TDM methods. In the case of SDM, the base station transmits one TB using multiple layers, and transmits layers belonging to different DMRS CDM groups using different transmit beams (i.e., QCL RS or TCI states). This can increase the number of layers compared to the existing S-TRP transmission method, thereby improving transmission capacity. In addition, when one TB is transmitted using multiple layers, some layers are transmitted to TRP 1 and the remaining layers are transmitted to TRP 2, which can improve channel reliability due to diversity gain.

[0259] For FDM, two schemes, scheme 2a and 2b, are supported. Here, scheme 2a transmits one TB to multi-RBs, but transmits RBs belonging to different RB groups with different Tx beams (i.e., QCL RS or TCI states). Scheme 2b transmits the same TB to different RB groups, but transmits RBs belonging to different RB groups with different Tx beams (i.e., QCL RS or TCI states). For TDM, two schemes, scheme 3 and 4, are supported. Here, scheme 4 (i.e., inter-slot TDM) repeatedly transmits the same TB in multiple slots, but transmits slots belonging to different slot groups with different Tx beams (i.e., QCL RS or TCI states). On the other hand, Scheme 3 (i.e., intra-slot TDM) repeatedly transmits the same TB in multiple OFDM symbol groups, but transmits some OFDM symbol groups and the remaining OFDM symbol groups with different Tx beams (i.e., QCL RS or TCI state).

[0260] Next, we will look at the M-DCI-based M-TRP PDSCH transmission method.

[0261] M-DCI based MTRP PDSCH transmission is a method in which each TRP schedules and transmits PDSCH through DCI. That is, TRP 1 transmits PDSCH 1 through DCI 1, and TRP 2 transmits PDSCH 2 through DCI 2. When PDSCH 1 and PDSCH 2 overlap in the same frequency / time resource, two PDSCHs are received for the same RE, which increases resource efficiency and increases transmission capacity. To this end, the concept of a CORESET pool, which refers to a group of multiple CORESETs, was introduced. For example, TRP 1 transmits a PDCCH through a CORESET belonging to CORESET pool 0, and also transmits the PDSCH scheduled by the PDCCH. TRP 2 transmits a PDCCH through a CORESET belonging to CORESET pool 1, and also transmits the PDSCH scheduled by the PDCCH.

[0262] Even for PUSCH, specific TRPs can schedule PUSCH transmissions to UEs via CORESETs within each COERSET pool. For example, some PUCCH resources may be scheduled by TRP 1, while the remaining PUCCH resources may be scheduled by TRP 2. UEs can transmit independent PUSCH / PUCCHs for each of TRPs 1 and 2.

[0263] In addition, the terminal may recognize the PUSCH (or PUCCH) scheduled by the DCI received based on different CORESETs (or CORESETs belonging to different CORESET groups) as a PUSCH (or PUCCH) transmitted to different TRPs or as a PUSCH (or PUCCH) of different TRPs. In addition, the method for UL transmission (e.g., PUSCH / PUCCH) transmitted to different TRPs can be equally applied to UL transmission transmitted to different panels belonging to the same TRP.

[0264] In addition, the CORESET group ID (or COERSET pool index having the same meaning) described / mentioned in the present disclosure may mean an index / identification information (e.g., ID) for distinguishing the CORESET for each TRP / panel. And the CORESET group may mean a group / union of CORESETs distinguished by an index / identification information (e.g., ID) / CORESET group ID for distinguishing the CORESET for each TRP / panel. For example, the CORESET group ID may be specific index information defined in the CORESET configuration. That is, the CORESET group may be set / indicated / defined by an index defined in the CORESET configuration for each CORESET. And / or, the CORESET group ID may mean an index / identification information / indicator for distinguishing / identifying the CORESETs set / associated with each TRP / panel.

[0265] The CORESET group ID described / mentioned in the present disclosure may be expressed by being replaced with a specific index / specific identification information / specific indicator for distinguishing / identifying the CORESETs set / associated with each TRP / panel. The information may be set / indicated through higher layer signaling (e.g., RRC signaling, MAC-CE, etc.) and / or physical layer signaling (e.g., DCI). For example, PDCCH detection may be set / indicated to be performed for each TRP / panel in units of the corresponding CORESET group, and UCI (e.g., CSI, HARQ-ACK / NACK, SR, etc.) and / or uplink physical channel resources (e.g., PUCCH / PRACH / SRS resources) may be set / indicated to be managed / controlled separately for each TRP / panel in units of the corresponding CORESET group. And / or, HARQ ACK / NACK (process / retransmission) for PDSCH / PUSCH, etc. scheduled for each TRP / panel by CORESET group unit can be managed.

[0266] For example, the upper layer parameter ControlResourceSet information element (IE) is used to configure a time / frequency control resource set (CORESET). The CORESET may be related to detection / reception of downlink control information. The ControlResourceSet IE may include a CORESET-related ID (e.g., controlResourceSetID) / a CORESET pool index for the CORESET (e.g., CORESETPoolIndex) / time / frequency resource configuration of the CORESET / TCI information related to the CORESET, etc. For example, the index of the CORESET pool (e.g., CORESETPoolIndex) may be set to 0 or 1. In the description above in the present disclosure, a CORESET group may correspond to a CORESET pool, and a CORESET group ID may correspond to a CORESET pool index (e.g., CORESETPoolIndex). The above-described ControlResourceSet (i.e., CORESET) can be set via higher layer signaling (e.g., RRC signaling).

[0267] Additionally, with respect to M-TRP transmission and reception in Rel-17 NR standardization, M-TRP PDCCH / PDSCH SFN transmission, S-DCI-based M-TRP PUSCH repeated transmission, and single PUCCH resource-based M-TRP PUCCH repeated transmission are supported. These transmission techniques repeatedly transmit the same contents (i.e., DCI / UL TB / UCI, etc.) with improved URLLC target for increased reliability. Here, M-TRP PDCCH repeated transmission is performed based on TDM or FDM, M-TRP PDCCH / PDSCH SFN transmission is performed in the same time / frequency / layer, S-DCI-based M-TRP PUSCH repeated transmission is performed based on TDM, and single PUCCH resource-based M-TRP PUCCH repeated transmission is performed based on TDM.

[0268] First, we will look at the S-DCI-based M-TRP PDCCH repetition transmission method.

[0269] In the NR Rel-17 standardization, multiple CORESETs with different TCI states (i.e., different QCL RSs) are configured for the UE for repeated M-TRP PDCCH transmission, and multiple SS (Search Space) sets are configured, each linked to the corresponding CORESETs. The base station can instruct / configure the UE that the SS set connected to one CORESET and the SS set connected to another CORESET are linked for repeated transmission. Through this, the UE can be informed that the PDCCH candidates of the corresponding SS set are being repeatedly transmitted.

[0270] For example, two CORESETs, CORESET 0 and CORESET 1, may be set for a terminal, CORESET 0 and CORESET 1 may be connected to SS set 0 and SS set 1, respectively, and SS set 0 and SS set 1 may be linked. The terminal may recognize that the same DCI has been repeatedly transmitted in the PDCCH candidate of SS set 0 and the PDCCH candidate of SS set 1, and may recognize that a specific PDCCH candidate of SS set 0 and a specific PDCCH candidate of SS set 1 are a pair set for repeatedly transmitting the same DCI based on a specific rule. The two PDCCH candidates are referred to as linked PDCCH candidates, and the terminal may successfully decode the corresponding DCI if it properly receives either of the two PDCCH candidates. However, when receiving a PDCCH candidate of SS set 0, the terminal may use the QCL RS (i.e., DL beam) of the TCI state of COERSET 0 connected to SS set 0, and when receiving a PDCCH candidate of SS set 1, the terminal may use the QCL RS (i.e., DL beam) of the TCI state of COERSET 1 connected to SS set 1. Accordingly, the terminal receives linked PDCCH candidates using different beams.

[0271] Next, we will look at the M-TRP SFN PDCCH / PDSCH transmission method.

[0272] M-TRP is a type of PDCCH repetition transmission, in which multiple TRPs can repeatedly transmit the same DCI through the same time / frequency / DMRS port. This transmission method can be referred to as SFN PDCCH transmission. However, for SFN PDCCH transmission, instead of configuring multiple CORESETs with different TCI states, the base station configures multiple TCI states in a single CORESET. When a terminal receives a PDCCH candidate through an SS set connected to a single CORESET, it can perform channel estimation of the PDCCH DMRS using all of the multiple TCI states and attempt decoding.

[0273] In addition, when the above-described M-TRP PDSCH is repeatedly transmitted, the two TRPs repeatedly transmit the corresponding channel on different resources. However, if the two TRPs use the same resource, that is, if the same channel is repeatedly transmitted through the same frequency / time / layer (i.e., DMRS port), the reliability of the corresponding channel can be improved. In this case, the repeatedly transmitted same channel is not distinguished in terms of resources, so it is received by being combined during transmission (i.e., over the air), and thus can be recognized as a single channel (e.g., a composite channel) from the perspective of the receiving end (e.g., a terminal). For SFN PDSCH transmission, two DL TCI states for PDSCH DMRS reception can be set for the terminal.

[0274] Next, we will look at the S-DCI-based M-TRP PUSCH repetitive transmission scheme.

[0275] In NR Rel-17 standardization, the base station configures two SRS sets for the UE for S-DCI-based M-TRP PUSCH transmission, and each set is used to indicate the UL Tx port and UL beam / QCL information for TRP 1 and TRP 2, respectively. In addition, the base station can indicate SRS resources for each SRS resource set through two SRI fields included in one DCI, and can indicate up to two PC parameter sets. For example, the first SRI field can indicate the SRS resources and PC parameter set defined in SRS resource set 0, and the second SRI field can indicate the SRS resources and PC parameter set defined in SRS resource set 1. The UE can be indicated the UL Tx port, PC parameter set, and UL beam / QCL information for TRP 1 through the first SRI field, and through this, the UE performs PUSCH transmission in the TO corresponding to SRS resource set 0. Similarly, the terminal can be instructed with the UL Tx port, PC parameter set, and UL beam / QCL information for TRP 2 through the second SRI field, through which the terminal performs PUSCH transmission in the TO corresponding to SRS resource set 1.

[0276] Next, we examine a single PUCCH resource-based M-TRP PUCCH repetition transmission scheme.

[0277] In NR Rel-17 standardization, for M-TRP PUCCH transmission based on a single PUCCH resource, a base station can activate / configure two spatial relation info (if FR1, activate / configure two PC parameter sets) for a single PUCCH resource to a UE. When UL UCI is transmitted through the PUCCH resource, each spatial relation info is used to indicate spatial relation info toward TRP 1 and TRP 2 to the UE. For example, through the value indicated in the first spatial relation info, the UE is instructed with Tx beam / PC parameter(s) toward TRP 1, and the UE performs PUCCH transmission at the TO corresponding to TRP 1 using the information. Similarly, through the value indicated in the second spatial relation info, the UE is instructed with Tx beam / PC parameter(s) toward TRP 2, and the UE performs PUCCH transmission at the TO corresponding to TRP 2 using the information.

[0278] In addition, for M-TRP PUCCH repeated transmission, the configuration method has been improved so that two spatial relation info can be configured for a PUCCH resource. That is, if PC (power control) parameters such as PLRS, Alpha, P0, and Closed loop index are configured for each spatial relation info, a spatial relation RS can be configured. Consequently, PC information and spatial relation RS information corresponding to two TRPs can be configured through two spatial relation info. Through this, the terminal transmits a UCI (i.e., CSI, ACK / NACK, SR, etc.) PUCCH using the first spatial relation info in the first TO, and transmits the same UCI PUCCH using the second spatial relation info in the second TO. In the present disclosure, a PUCCH resource with two spatial relation info configured is referred to as an M-TRP PUCCH resource, and a PUCCH resource with one spatial relation info configured is referred to as an S-TRP PUCCH resource.

[0279] Additionally, in NR wireless communication systems, multi-TB PUSCH / PDSCH scheduling based on S-DCI may be considered. For example, in ultra-high frequency bands (e.g., beyond 5.26 GHz, FR2 band) of NR wireless communication systems (e.g., Rel-17-based NR systems), a method in which a single DCI simultaneously schedules multiple PUSCHs / PDSCHs may be supported.

[0280] As a specific example, multiple time resources (e.g., TDRA, TO (Transmission Occasion)) can be indicated at once through the time resource allocation field (e.g., TDRA field) of the DCI that schedules the PUSCH. In this case, different TBs can be transmitted for each TO through the PUSCH. The values ​​of the frequency resource allocation field (e.g., FDRA field), the Modulation and Coding Scheme (MCS) field, the transmitted precoding matrix indicator (TPMI) field, and / or the SRS resource Indicator (SRI) field of the DCI can be commonly applied to multiple TBs to be scheduled. In addition, the new data indicator (NDI) and the redundancy version (RV) for each TB are individually indicated through the DCI, and the HARQ number is indicated by a single value, but can sequentially increase in the order of the TOs based on the initial TO.

[0281] STxMP (simultaneous transmission for multiple panels)

[0282] Additionally, in relation to the NR wireless communication system, a method in which a terminal simultaneously transmits multiple channels / RSs of the same type or multiple channels / RSs of different types may be considered.

[0283] Existing terminals have limitations in transmitting multiple channels / RSs at a single point in time. For example, a terminal can simultaneously transmit multiple SRS resources from different SRS resource sets for UL beam management, but cannot simultaneously transmit multiple PUSCHs. In contrast, future advanced terminals may consider relaxing these limitations and simultaneously transmitting multiple channels / RSs using multiple transmission panels. Such terminals may be referred to as STxMP (simultaneous transmission across multi-panel) terminals.

[0284] For example, a method may be applied in which two PUSCHs corresponding to two UL TBs (i.e., a first PUSCH and a second PUSCH) are scheduled in the same RE (resource element), a first spatial information RS and a first power control (PC) parameter set are set for the first PUSCH, and a second spatial information RS and a second PC parameter set are set for the second PUSCH. That is, a first UL TCI state may be set for the first PUSCH, and a second UL TCI state may be set for the second PUSCH. In this case, the UE may transmit the first PUSCH using a first Tx spatial filter (e.g., a first panel) corresponding to the first UL TCI state, and transmit the second PUSCH using a second Tx spatial filter (e.g., a second panel) corresponding to the second UL TCI state.

[0285] In this regard, when the base station schedules the PUSCH through DCI, the base station can instruct the terminal on which of the STxMP scheme, single panel-based scheme, or M-TRP-based PUSCH repetition transmission scheme to apply as the corresponding PUSCH transmission scheme. Here, the STxMP scheme is possible if the terminal supports STxMP capability, and the STxMP mode needs to be enabled in advance for the terminal through RRC signaling, etc. To this end, the existing SRS resource set indication field may be redefined, or a new DCI field may be introduced.

[0286] Additionally, with respect to the aforementioned STxMP transmission method, two methods can be considered: the SFN (single frequency network) method and the SDM (spatial division multiplexing) method.

[0287] Specifically, the SFN method transmits the same channel transmitted by one panel to other panels. Since the UL channels of each panel may differ, UL transmission can be performed using different precoders, different transmit powers, and different transmission beams (e.g., spatial relationship RSs indicated by the UL TCI status) for each panel.

[0288] The SDM method is a method that can be applied to transmission based on ranks greater than or equal to 2, and is a method in which some layers among multi-layers are transmitted on one panel and the remaining layers are transmitted on another panel. For example, in the case of the SDM method for 2-layer transmission, the first layer may be transmitted on the first panel, and the second layer may be transmitted on the second panel. In this case, since the UL channels of each panel may be different, UL transmission may be performed using different precoders, different transmit powers, and different transmit beams (e.g., spatial relationship RSs indicated by the UL TCI state) for each panel.

[0289] The panels described in this disclosure may be applied by replacing them with other resources / terms corresponding to the panels.

[0290] For example, different panels may be mapped to and used for different SRS resource sets or SRS resources. As a specific example, a first panel may be mapped to SRS resource set 0, and a second panel may be mapped to SRS resource set 1. In this case, the SRS resource(s) belonging to SRS resource set 0 may be associated with the (transmit) antenna port of the first panel, and the SRS resource(s) belonging to SRS resource set 1 may be associated with the (transmit) antenna port of the second panel.

[0291] In this regard, different resources / terms corresponding to panels are used. For example, different panels may be mapped to and used for different SRS resource sets or SRS resources. For example, the first panel may be mapped to SRS resource set 0, the second panel may be mapped to SRS resource set 1, and the SRS resources of SRS resource set 0 may refer to the transmit antenna ports of the first panel, and the SRS resources of SRS resource set 1 may refer to the transmit antenna ports of the second panel.

[0292] DCI scheduling methods for STxMP PUSCH can be broadly classified into two types. S-DCI-based STxMP is a method in which one DCI performs PUSCH scheduling for STxMP transmission, and can be transmitted using a technique (e.g., SFN or SDM) preset through RRC configuration. M-DCI-based STxMP is a method in which different DCIs schedule the PUSCHs transmitted by each panel. That is, assuming there are two panels, the first DCI can schedule PUSCH 1 transmitted by panel 1, and the second DCI can schedule PUSCH 2 transmitted by panel 2. In this case, the first DCI can be transmitted through a CORESET corresponding to a CORESET full index = 0, and the second DCI can be transmitted through a CORESET corresponding to a CORESET full index = 1. PUSCH 1 can be transmitted using a port of an SRS resource of SRS resource set 0, and PUSCH 2 can be transmitted using a port of an SRS resource of SRS resource set 1.

[0293] For STxMP PUCCH, if two UL TCI states or two Joint TCI states are configured to apply to a single PUCCH resource, the corresponding PUCCH resource can be transmitted via SFN STxMP. Otherwise, if one UL TCI state or one Joint TCI state is configured to apply, the corresponding PUCCH resource can be transmitted via a single panel.

[0294] In this regard, a UL panel may be represented in a 1:1 correspondence to a specific SRS resource set, UL TCI state, joint TCI state, spatial relation RS, TAG, or panel ID. For example, when SRS resource sets 0 and 1 are configured, PUSCH transmission using SRS resource set 0 may be transmitted through panel 0, and PUSCH transmission using SRS resource set 1 may be transmitted through panel 1. Similarly, when two UL TCI states are configured, PUSCH transmission to which the first UL TCI state is applied may be transmitted through panel 0, and PUSCH transmission to which the second UL TCI state is applied may be transmitted through panel 1. In a similar manner, when two joint TCI states, spatial relation RS, TAG, or panel ID are configured, they may be mapped to and used for panels 0 and 1, respectively.

[0295] Instructions for M-TRP / STxMP transmission technique via a single DCI scheduling multiple channels

[0296] Wireless communication systems support the simultaneous scheduling of multiple channels through a single DCI. In this case, scheduling information indicated by some fields in the DCI is applied commonly to multiple channels, while information indicated by other fields may be applied differently for each channel.

[0297] For example, 3GPP Rel-16 allows for multi-PUSCH scheduling based on a single DCI, whereby PUSCHs can be transmitted sequentially across consecutive slots / symbol groups. The same frequency, MCS, TPMI, SRI, and DMRS can be applied to these PUSCHs.

[0298] For another example, for 3GPP Rel-17, multiple PUSCH / PDSCH scheduling based on a single DCI is possible, where different TDRA, NDI, RV, HARQ number (e.g., HARQ process ID) can be indicated for each PUSCH or each PDSCH. However, the same frequency, MCS, TPMI, SRI, DMRS, and TCI states can be applied to the channels.

[0299] As another example, for 3GPP Rel-18, single DCI-based multi-PUSCH / PDSCH scheduling is possible, where different CC (component carrier) / cell, TCI state, TDRA, FDRA, NDI, RV, HARQ number (e.g., HARQ process ID), MCS, TPC command, TPMI, SRI, DMRS, PTRS can be applied for each PUSCH or each PDSCH.

[0300] Unlike these existing methods, the present disclosure proposes a method that utilizes a single DCI for multi-PUSCH / PDSCH scheduling to indicate various M-TRP / STxMP transmission techniques.

[0301] The proposed method of the present disclosure enables dynamic switching between various M-TRP / STxMP transmission techniques, and enables M-TRP / STxMP PDSCH / PUSCH scheduling using existing DCI formats (e.g., DCI formats 0_3 / 1_3 for multiple PDSCHs / PUSCHs). Here, M-TRP / STxMP PDSCH / PUSCH scheduling may mean scheduling for PDSCHs / PUSCHs to which M-TRP transmission techniques / STxMP transmission techniques are applied.

[0302] In other words, in the proposed method of the present disclosure, the DCI format for a single DCI for multiple PDSCHs / PUSCHs and the DCI format for M-TRP / STxMP PDSCH / PUSCH scheduling are not distinguished, and a single, identical DCI format can be used. This can reduce the blind decoding (BD) overhead associated with DCI reception compared to a method that uses different DCI formats.

[0303] Hereinafter, a method for setting / instructing an M-TRP transmission technique on the DL side and a method for setting / instructing an STxMP transmission technique on the UL side based on scheduling information by a single DCI are described through embodiments.

[0304] The embodiments described below are distinguished only for the convenience / clarity of explanation, and the method of one embodiment may be replaced with the method of another embodiment or applied in combination / combination with the method of another embodiment.

[0305] Example 1

[0306] This embodiment relates to a method for setting / instructing an M-TRP transmission technique on the DL side based on scheduling information by a single DCI.

[0307] In the following methods, if some or all of the conditions / combinations / configurations of scheduling information described below are satisfied for multiple PDSCHs scheduled by one DCI, the terminal may assume / recognize that the corresponding M-TRP transmission technique is applied to multiple PDSCHs.

[0308] (Example 1-1. M-TRP SFN transmission technique or M-TRP CJT transmission technique)

[0309] The M-TRP SFN transmission technique or the M-TRP CJT transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0310] - Indicate different TCI states (or QCL RS, or transmit beam), and / or

[0311] - Same frequency / time resource indication, and / or

[0312] - Indicates the same HARQ information (e.g., same HARQ number / NDI / RV), and / or

[0313] - Same CC(component carrier) / cell indication, and / or

[0314] - directing the same DMRS port(s), and / or

[0315] - Same MCS instructions, and / or

[0316] - Same PUCCH resources, PUCCH power control command indication

[0317] In the case of Example 1-1, the UE can determine / recognize that the PDSCHs transmit the same TB because they share the same HARQ information for the same CC / cell. In addition, since the PDSCHs are mapped to different TCI states and transmitted through the same time / frequency / layer (e.g., space) resources, the UE can determine / recognize that the M-TRPs (corresponding to the TCI states) transmit the PDSCHs through the SFN transmission technique or the CJT transmission technique. In this case, information about whether the transmission technique is the SFN transmission technique or the CJT transmission technique can be indicated to the UE by the base station through separate signaling.

[0318] Therefore, the terminal can decode the PDSCH by assuming that the corresponding PDSCHs are one and the same PDSCH and assuming that the QCL RS(s) of the indicated TCI state(s) (e.g., QCL RS(s) of the same QCL type) and the indicated DMRS are QCLed. Based on the decoding result, the terminal can report ACK / NACK information for the PDSCH through the indicated PUCCH resource with the indicated PUCCH power.

[0319] In addition, since the HARQ number and NDI value are the same, the corresponding PXSCH (e.g., PDSCH / PUSCH) transmits the same TB (transport block), and NDI = 0 can indicate initial transmission, and NDI = 1 can indicate retransmission. In other methods of the present disclosure, when the HARQ number and NDI value are indicated to be the same, the same may be applied.

[0320] For example, one DCI schedules a first PDSCH, a second PDSCH, and a third PDSCH, and a first TCI state (e.g., TCI state 0), a second TCI state (e.g., TCI state 1), and a third TCI state (e.g., TCI state 2) are indicated for the first PDSCH, the second PDSCH, and the third PDSCH, respectively, and the same scheduling information (for some or all of the aforementioned scheduling conditions) may be indicated (e.g., a first DMRS port (e.g., DMRS port 0), a second DMRS port (e.g., DMRS port 1), and a third DMRS port (e.g., DMRS port 2)). In this case, the UE may assume the first PDSCH, the second PDSCH, and the third PDSCH as one rank 3 PDSCH, and may receive it through the first DMRS port, the second DMRS port, and the third DMRS port. Additionally, the terminal may determine / recognize the QCL type / RS by mapping the first TCI state, the second TCI state, and the third TCI state to each of the first DMRS port, the second DMRS port, and the third DMRS port, respectively. That is, the first TCI state, the second TCI state, and the third TCI state may be mapped to the first DMRS port, the first TCI state, the second TCI state, and the third TCI state may be mapped to the second DMRS port, and the first TCI state, the second TCI state, and the third TCI state may be mapped to the third DMRS port.

[0321] (Example 1-2. S-DCI-based NCJT M-TRP transmission technique)

[0322] The S-DCI based NCJT M-TRP transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0323] - Indicate different TCI states (or QCL RS, or transmit beam), and / or

[0324] - Same frequency / time resource indication, and / or

[0325] - Indicates the same HARQ information (e.g., the same HARQ number), and / or

[0326] - Same CC(component carrier) / cell indication, and / or

[0327] - directing different DMRS port(s), and / or

[0328] - Same PUCCH resources, PUCCH power control command indication

[0329] In the case of Example 1-2, the UE recognizes that the PDSCHs share the same HARQ information for the same CC / cell. However, unlike in the case of Example 1-1, different DMRS port(s) may be indicated for the PDSCHs, and different MCS / NDI / RV may be configured. Accordingly, the PDSCHs may be different TBs / codewords. In addition, although the PDSCHs are transmitted through the same time / frequency resources, they are mapped to different TCI states and transmitted through different layers and different MCSs, so the UE can determine / recognize that the M-TRPs (corresponding to the TCI states) transmit the PDSCHs through the NCJT transmission technique.

[0330] Therefore, the terminal can assume the PDSCHs are a single, identical PDSCH and receive the same PDSCH using all DMRS ports designated for the PDSCHs. Furthermore, the terminal can apply different TCI states to each DMRS port. Based on the decoding results, the terminal can report ACK / NACK information for the PDSCH using the designated PUCCH resources and with the designated PUCCH power.

[0331] For example, one DCI may schedule a first PDSCH, a second PDSCH, and a third PDSCH, and a first TCI state (e.g., TCI state 0), a second TCI state (e.g., TCI state 1), and a third TCI state (e.g., TCI state 2) may be indicated for the first PDSCH, the second PDSCH, and the third PDSCH, respectively, and a first DMRS port (e.g., DMRS port 0), a second DMRS port (e.g., DMRS port 1), and a third DMRS port (e.g., DMRS port 2), and a first MCS (e.g., MCS 0), a second MCS (e.g., MCS 1), and a third MCS (e.g., MCS 2) may be indicated. In this case, the terminal may assume the first PDSCH, the second PDSCH, and the third PDSCH as one rank 3 PDSCH and receive them through the first DMRS port, the second DMRS port, and the third DMRS port. In addition, the terminal may apply the first MCS, the second MCS, and the third MCS to the first DMRS port, the second DMRS port, and the third DMRS port, respectively, and may determine / recognize the QCL type / RS by mapping the first TCI state, the second TCI state, and the third TCI state. That is, the first MCS and the first TCI state may be mapped to the first DMRS port, the second MCS and the second TCI state may be mapped to the second DMRS port, and the third MCS and the third TCI state may be mapped to the third DMRS port.

[0332] In the case of NCJT transmission, since the layer transmitted by each TRP is distinguished, MCS can be set according to the DL channel situation of each TRP. In order to set the MCS differently for each TRP, the layer(s) transmitted by each TRP must be mapped to different codewords. For example, in the example described above, the first DMRS port, the second DMRS port, and the third DMRS port must be mapped to different codewords (e.g., the first codeword (e.g., codeword 0), the second codeword (e.g., codeword 1), and the third codeword (e.g., codeword 2), respectively), and the TB / MCS / RV / NDI values ​​can also be set differently.

[0333] In Example 1-2, it was assumed that different TB / MCS / RV / NDI / codewords can be indicated for PDSCHs, but considering simple implementation, a restriction can be added to limit the indication to the same TB / MCS / RV / NDI / codeword.

[0334] (Example 1-3. M-TRP TD (time domain) repetitive transmission technique)

[0335] The M-TRP TD repeat transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0336] - Indicate different TCI states (or QCL RS, or transmit beam), and / or

[0337] - same frequency resource indication, and / or

[0338] - different time resource instructions, and / or

[0339] - Indicates the same HARQ information (e.g., same HARQ number / NDI), and / or

[0340] - Same CC(component carrier) / cell indication, and / or

[0341] - Same PUCCH resources, PUCCH power control command indication

[0342] In the case of Example 1-3, the terminal can determine / recognize that the PDSCHs are transmitting the same TB because they share the same HARQ information for the same CC / cell. However, unlike the case of Example 1-1, different time resources may be indicated for the PDSCHs, and different DMRS ports and different MCSs may be set.

[0343] Therefore, the terminal can assume that the corresponding PDSCHs are one identical PDSCH, and can assume that the M-TRPs (corresponding to TCI states) transmit one identical PDSCH through the M-TRP TD repetition transmission technique.

[0344] For example, one DCI schedules a first PDSCH, a second PDSCH, and a third PDSCH, and a first TCI state (e.g., TCI state 0), a second TCI state (e.g., TCI state 1), and a third TCI state (e.g., TCI state 2) are indicated for the first PDSCH, the second PDSCH, and the third PDSCH, respectively, a first DMRS port (e.g., DMRS port 0), a second DMRS port (e.g., DMRS port 1), and a third DMRS port (e.g., DMRS port 2) are indicated, a first MCS (e.g., MCS 0), a second MCS (e.g., MCS 1), and a third MCS (e.g., MCS 2) are indicated, a first RV (e.g., RV 0), a second RV (e.g., RV 1), and a third RV (e.g., RV 2) are indicated, and a first A TDRA slot (e.g., TDRA slot 0), a second TDRA slot (e.g., TDRA slot 1), and a third TDRA slot (e.g., TDRA slot 2) may be indicated.

[0345] In this case, the terminal may receive the same PDSCH with the first MCS and the first RV through the first DMRS port using the information of the first TCI state in the first TDRA slot, the same PDSCH with the second MCS and the second RV through the second DMRS port using the information of the second TCI state in the second TDRA slot, and the same PDSCH with the third MCS and the third RV through the third DMRS port using the information of the third TCI state in the third TDRA slot. That is, the terminal may repeatedly receive the same PDSCH a total of three times. At this time, the TB size may be determined based on a specific one of the first PDSCH, the second PDSCH, and the third PDSCH (e.g., the first PDSCH or the last PDSCH). Based on the decoding result, the terminal may report ACK / NACK information for the PDSCH with the indicated PUCCH power through the indicated PUCCH resource.

[0346] In Example 1-3, it was assumed that different DMRS ports / MCS / RVs can be indicated for PDSCHs, but for simple implementation, a restriction can be added to limit the indication to the same DMRS port / MCS / RV.

[0347] (Example 1-4. M-TRP FD (frequency domain) repetitive transmission technique)

[0348] The M-TRP FD repeat transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0349] - Indicate different TCI states (or QCL RS, or transmit beam), and / or

[0350] - Same time resource instructions, and / or

[0351] - different frequency resource indications, and / or

[0352] - Indicates the same HARQ information (e.g., same HARQ number / NDI), and / or

[0353] - Same CC(component carrier) / cell indication, and / or

[0354] - Same PUCCH resources, PUCCH power control command indication

[0355] In the case of Example 1-4, the terminal can determine / recognize that the PDSCHs are transmitting the same TB because they share the same HARQ information for the same CC / cell. However, unlike the case of Example 1-1, different frequency resources may be indicated for the PDSCHs, and different DMRS ports and different MCSs may be set.

[0356] Therefore, the terminal can assume that the corresponding PDSCHs are one identical PDSCH, and can assume that the M-TRPs (corresponding to the TCI states) transmit one identical PDSCH through the M-TRP FD repetition transmission technique.

[0357] For example, one DCI schedules a first PDSCH, a second PDSCH, and a third PDSCH, and a first TCI state (e.g., TCI state 0), a second TCI state (e.g., TCI state 1), and a third TCI state (e.g., TCI state 2) are indicated for the first PDSCH, the second PDSCH, and the third PDSCH, respectively, a first DMRS port (e.g., DMRS port 0), a second DMRS port (e.g., DMRS port 1), and a third DMRS port (e.g., DMRS port 2) are indicated, a first MCS (e.g., MCS 0), a second MCS (e.g., MCS 1), and a third MCS (e.g., MCS 2) are indicated, a first RV (e.g., RV 0), a second RV (e.g., RV 1), and a third RV (e.g., RV 2) are indicated, and a first An FDRA RB (e.g., FDRA RB 0), a second FDRA RB (e.g., FDRA RB 1), and a third FDRA RB (e.g., FDRA RB 2) may be designated.

[0358] In this case, the terminal can receive the same PDSCH with the first MCS and the first RV through the first DMRS port using the information of the first TCI state in the first FDRA RB, the same PDSCH with the second MCS and the second RV through the second DMRS port using the information of the second TCI state in the second FDRA RB, and the same PDSCH with the third MCS and the third RV through the third DMRS port using the information of the third TCI state in the third FDRA RB. That is, the terminal can repeatedly receive the same PDSCH a total of three times. At this time, the TB size can be determined based on a specific one of the first PDSCH, the second PDSCH, and the third PDSCH (e.g., the first PDSCH or the last PDSCH). Based on the decoding result, the terminal can report ACK / NACK information for the PDSCH with the indicated PUCCH power through the indicated PUCCH resource.

[0359] In Example 1-4, it was assumed that different DMRS ports / MCS / RVs can be indicated for PDSCHs, but for simple implementation, a restriction can be added to limit the indication to the same DMRS port / MCS / RV.

[0360] (Example 1-5. M-DCI-based NCJT M-TRP transmission technique)

[0361] The M-DCI based NCJT M-TRP transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0362] - Indicate different TCI states (or QCL RS, or transmit beam), and / or

[0363] - Resource indications that overlap with the same frequency / time resource or at least one RE, and / or

[0364] - Indicate different HARQ information (e.g., different HARQ numbers), and / or

[0365] - Same CC(component carrier) / cell indication, and / or

[0366] - directing different DMRS port(s), and / or

[0367] In the case of Example 1-5, the UE can determine / recognize that different TBs are being transmitted because the corresponding PDSCHs are configured with the same HARQ information for the same CC / cell. In addition, since at least one RE of the corresponding PDSCHs overlaps or the entire allocated RE overlaps, and the corresponding PDSCHs are transmitted to different DMRS ports, the UE can assume that the corresponding PDSCHs are transmitted via the NCJT transmission technique for the overlapping REs.

[0368] This may be similar to the existing M-DCI-based NCJT M-TRP transmission technique, where two DCIs each transmit different PDSCHs to different DMRS ports in overlapping REs. From the DCI reception perspective, it is different in that it is received as a single DCI rather than two DCIs, but from the PDSCH reception perspective, it may be identical to the existing M-DCI-based NCJT M-TRP transmission technique. That is, although one DCI is used, the receiver may interpret it as if there are two DCIs.

[0369] Since each PDSCH is a channel transmitting a different TB, it is decoded independently, and based on the decoding result, the terminal can report ACK / NACK information for each PDSCH.

[0370] Example 2

[0371] This embodiment relates to a method for setting / instructing an STxMP transmission technique on the UL side based on scheduling information by a single DCI.

[0372] In the following methods, if some or all of the conditions / combinations / configurations of scheduling information described below are satisfied for multiple PUSCHs scheduled by one DCI, the terminal may assume / recognize that the corresponding STxMP transmission technique is applied to multiple PUSCHs.

[0373] (Example 2-1. STxMP SFN transmission technique or STxMP CJT transmission technique)

[0374] The STxMP SFN SFN transmission technique or the STxMP CJT transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0375] - Indicate different (UL / joint) TCI states (or spatial relationship RS, or transmit beam, or transmit beam, or SRS resource set), and / or

[0376] - Same frequency / time resource indication, and / or

[0377] - Indicates the same HARQ information (e.g., same HARQ number / NDI / RV), and / or

[0378] - Same CC(component carrier) / cell indication, and / or

[0379] - directing the same DMRS port(s), and / or

[0380] - Same MCS instructions, and / or

[0381] In the case of Example 2-1, the UE can determine / recognize that the same TB is transmitted because the corresponding PUSCHs share the same HARQ information for the same CC / cell. In addition, since the corresponding PDSCHs are mapped to different TCI states and transmitted through the same time / frequency / layer (e.g., space) resources, the UE can transmit a single PUSCH through the SFN transmission technique or the CJT transmission technique using multiple panels (corresponding to the TCI states). Here, information about whether the transmission technique is the SFN transmission technique or the CJT transmission technique can be indicated to the UE by the base station through separate signaling. At this time, the UE can perform STxMP PUSCH transmission through each panel by applying the indicated SRI, TPMI, TPC, and TCI states for each of the corresponding PUSCHs.

[0382] For example, one DCI schedules a first PUSCH, a second PUSCH, and a third PUSCH, and a first TCI state (e.g., TCI state 0), a second TCI state (e.g., TCI state 1), and a third TCI state (e.g., TCI state 2) are indicated for the first PUSCH, the second PUSCH, and the third PUSCH, respectively, a first SRI (SRS resource indicator) (e.g., SRI 0), a second SRI (e.g., SRI 1), and a third SRI (e.g., SRI 2) are indicated, a first TPMI (e.g., TPMI 0), a second TPMI (e.g., TPMI 1), and a third TPMI (e.g., TPMI 2) are indicated, and a first TPC value (e.g., TPC value 0), a second TPC value (e.g., TPC value 1), and a third TPC value (e.g., TPC Value 2) is indicated, and the same scheduling information (for some or all of the aforementioned scheduling conditions) may be indicated for all of the first PUSCH, the second PUSCH, and the third PUSCH (e.g., the first DMRS port (e.g., DMRS port 0), the second DMRS port (e.g., DMRS port 1), and the third DMRS port (e.g., DMRS port 2)).

[0383] In this case, the terminal may transmit one and the same rank 3 PUSCH (e.g., based on the first DMRS port, the second DMRS port, and the third DMRS port), which may be transmitted using the SRS port(s) of the first SRI, the first TPMI, and the first TPC value through a panel corresponding to the first TCI state, the SRS port(s) of the second SRI, the second TPMI, and the second TPC value through a panel corresponding to the second TCI state, and the SRS port(s) of the third SRI, the third TPMI, and the third TPC value through a panel corresponding to the third TCI state.

[0384] (Example 2-2. STxMP SDM transmission technique)

[0385] The STxMP SDM transmission technique may be indicated when some or all of the following scheduling conditions are satisfied.

[0386] - Indicate different (UL / joint) TCI states (or spatial relationship RS, or transmit beam, or transmit beam, or SRS resource set), and / or

[0387] - Same frequency / time resource indication, and / or

[0388] - Indicates the same HARQ information (e.g., the same HARQ number), and / or

[0389] - Same CC(component carrier) / cell indication, and / or

[0390] - directing different DMRS port(s), and / or

[0391] In the case of Example 2-2, the corresponding PUSCHs share the same HARQ information for the same CC / cell, and the corresponding PUSCHs are mapped to different TCI states and transmitted through the same time / frequency resources and different layers (or DMRS port(s)), so that the UE can transmit the PUSCHs through the SDM transmission technique using multiple panels (corresponding to the TCI states). At this time, the UE can perform STxMP PUSCH transmission through each panel by applying the indicated SRI, TPMI, TPC, and TCI states to each of the corresponding PUSCHs.

[0392] For example, one DCI schedules a first PUSCH, a second PUSCH, and a third PUSCH, and a first TCI state (e.g., TCI state 0), a second TCI state (e.g., TCI state 1), and a third TCI state (e.g., TCI state 2) are indicated for the first PUSCH, the second PUSCH, and the third PUSCH, respectively, a first SRI (SRS resource indicator) (e.g., SRI 0), a second SRI (e.g., SRI 1), and a third SRI (e.g., SRI 2) are indicated, a first TPMI (e.g., TPMI 0), a second TPMI (e.g., TPMI 1), and a third TPMI (e.g., TPMI 2) are indicated, and a first TPC value (e.g., TPC value 0), a second TPC value (e.g., TPC value 1), and a third TPC value (e.g., TPC The value 2) is indicated, the first MCS (e.g., MCS 0), the second MCS (e.g., MCS 1), and the third MCS (e.g., MCS 2) are indicated, the first DMRS port (e.g., DMRS port 0), the second DMRS port (e.g., DMRS port 1), and the third DMRS port (e.g., DMRS port 2) are indicated, and the same scheduling information (for some or all of the aforementioned scheduling conditions) may be indicated for all of the first PUSCH, the second PUSCH, and the third PUSCH.

[0393] In this case, the terminal may transmit one and the same rank 3 PUSCH, and the PUSCH may be transmitted using the SRS port(s) of the first SRI, the first TPMI, the first TPC value, the first MCS, and the first DMSR port through a panel corresponding to the first TCI state, the SRS port(s) of the second SRI, the second TPMI, the second TPC value, the second MCS, and the second DMSR port through a panel corresponding to the second TCI state, and the SRS port(s) of the third SRI, the third TPMI, the third TPC value, the third MCS, and the third DMSR port through a panel corresponding to the third TCI state.

[0394] In the case of SDM transmission, since the layers transmitted by each panel are distinct, MCS can be set according to the UL channel conditions of each panel. In order to set the MCS differently for each panel, the layer(s) transmitted by each panel must be mapped to different codewords. For example, in the example described above, the first DMRS port, the second DMRS port, and the third DMRS port must be mapped to different codewords (e.g., the first codeword (e.g., codeword 0), the second codeword (e.g., codeword 1), and the third codeword (e.g., codeword 2), respectively), and the TB / MCS / RV / NDI values ​​can also be set differently.

[0395] In Example 2-2, it was assumed that different TB / MCS / RV / NDI / codewords can be indicated for PUSCHs, but considering simple implementation, a restriction can be added to limit the indication to the same TB / MCS / RV / NDI / codeword.

[0396] (Example 2-3. M-DCI based STxMP SDM transmission technique)

[0397] The M-DCI based STxMP SDM transmission technique can be indicated when some or all of the following scheduling conditions are satisfied.

[0398] - Indicate different (UL / joint) TCI states (or spatial relationship RS, or transmit beam, or transmit beam, or SRS resource set), and / or

[0399] - Indicates the same time resource or at least one identical OFDM symbol resource, and / or

[0400] - Same CC(component carrier) / cell indication, and / or

[0401] - directing different DMRS port(s), and / or

[0402] In the case of Example 2-3, the UE can determine / recognize that different TBs are transmitted because the corresponding PUSCHs are configured with different HARQ information for the same CC / cell. In addition, since at least one OFDM symbol of the corresponding PUSCHs overlaps or the entire allocated OFDM symbols overlap, and the corresponding PUSCHs are transmitted on different DMRS ports, the UE can assume that the corresponding PUSCHs are transmitted via the STxMP SDM transmission technique for the overlapped symbols.

[0403] This may be similar to the existing M-DCI-based STxMP SDM transmission technique, where two DCIs transmit different PUSCHs in overlapping OFDM symbols to different DMRS ports. From the DCI reception perspective, it is different in that it is received as one DCI instead of two, but from the PUSCH reception perspective, it may be identical to the existing M-DCI-based STxMP SDM / transmission technique. That is, although one DCI is used, the receiver may interpret it as if there are two DCIs.

[0404] Since each PUSCH is a channel transmitting a different TB, it is encoded independently and can be transmitted through different panels.

[0405] In the various methods proposed in the embodiments of the present disclosure, being limited to the same value may mean that the indication value of the scheduling information / field for each PXSCH (e.g., PDSCH / PUSCH) is the same.

[0406] Additionally, this may indicate that the field of a specific PXSCH is used as a representative for indicating scheduling information, and that the field values ​​of the remaining PXSCHs are applied identically by indicating that the values ​​of the fields of the corresponding PXSCHs are null / reserved. For example, the specific PXSCH may correspond to the first PXSCH among PXSCHs applying the same scheduling information in which the field configuration of the DCI is made first (e.g., located closest to the most significant bit (MSB) of the DCI payload) or the PXSCH that is transmitted and received first in time order.

[0407] For example, if a first PDSCH and a second PDSCH are scheduled, and the TDRA field of the first PDSCH indicates a resource and the TDRA field of the second PDSCH indicates null, the UE can assume that the same time resource is indicated for the first PDSCH and the second PDSCH. Through this, the base station can distinguish whether the field values ​​of the two PXSCHs are set to be the same without the intention of transmitting and receiving M-TRP / STxMP (e.g., when each field value is indicated), or whether the field values ​​are intentionally set to be the same in order to apply / indicate the aforementioned M-TRP / STxMP transmission technique (e.g., when a representative field value is indicated and the remaining fields are indicated to be reserved).

[0408] In the case of DCI format 0_3 / 1_3 used in existing wireless communication systems, the cells of each PXSCH are restricted to be different from each other. Therefore, to apply the proposed method of the present disclosure, this restriction needs to be removed.

[0409] For example, with respect to the method of indicating a cell index, a set of schedulable cells may be established through the corresponding DCI, and a list of all or part of the cells included in the cell set may be defined in each code point of a field indicating a cell in the DCI. In this case, in order to apply the proposed method of the present disclosure, the same cell among the cells included in the cell set must be defined repeatedly in each code point. Alternatively, if different cells (e.g., cell 1 and cell 2) are defined in one code point and the corresponding code point is indicated and a specific condition is satisfied, the terminal may assume that these are the same cells (e.g., cell 1 and cell 1). At this time, if cell 1 and cell 2 are indicated by a method utilizing a specific condition, but multiple TCI states for cell 1 are indicated for M-TRP purposes, the terminal may recognize this as the M-TRP PXSCH of cell 1, not the PXSCHs of each of cell 1 and cell 2.

[0410] Additionally or alternatively, when considering flexibility as well as DCI overhead, an explicit indicator could be defined within the DCI to indicate which transmission technique is applied, and the number / type / size, etc. of the remaining fields could be flexibly reconfigured based on the value of the indicator (e.g., the indicated transmission technique).

[0411] For example, if a specific transmission technique A is indicated through the indicator, a structure may be considered in which only one RA field (with a subdivided RGB unit size), only one MCS field (based on a full table), only one HARQ parameter field (with a full size), only one DMRS port field, or only one PUCCH resource field / PUCCH power command (PC) field is configured in the DCI. In contrast, if a different transmission technique B is indicated through the indicator, a structure may be considered in which multiple RA fields (with non-subdivided RGB unit sizes), multiple MCS fields (based on a partial table or delta MCS), multiple HARQ parameter fields (with a reduced size), multiple DMRS port fields, or multiple PUCCH resource fields / PUCCH power command (PC) fields are configured in the DCI.

[0412] In the case of Embodiments 1-1, 1-2, 2-1, and 2-2 described above in the present disclosure, multiple TRPs / panels can cooperatively transmit a single PXSCH. Therefore, in the case of Embodiments 1-1, 1-2, 2-1, and 2-2, the terminal can transmit and receive a single PXSCH instead of individually transmitting and receiving multiple PXSCHs. For example, if two PDSCHs satisfy the scheduling conditions in Embodiments 1-1 and 1-2, the terminal can perform decoding once for one PDSCH instead of separately decoding each PDSCH. As another example, if two PUSCHs satisfy the scheduling conditions in Embodiments 2-1 and 2-2, the terminal can perform encoding once for one PUSCH instead of separately encoding each PUSCH.

[0413] Although the proposed methods of the present disclosure have been described as indicating the same CC / cell for multiple channels, the proposed methods of the present disclosure can be applied even when indicating different CC / cells based on an M-TRP transmission technique between multiple carriers (e.g., an inter-CC M-TRP transmission technique) or an M-TRP transmission technique between multiple cells (e.g., an inter-cell M-TRP transmission technique).

[0414] FIG. 16 and FIG. 17 illustrate the operation of a first device (e.g., a terminal) and a second device (e.g., a base station) performing channel transmission and reception based on the M-TRP / STxMP transmission technique in the embodiments of the present disclosure described above.

[0415] FIG. 16 is a drawing for explaining the operation of the first device according to an embodiment of the present disclosure.

[0416] Referring to FIG. 16, the first device can receive a single DCI scheduling multiple channels from the second device (S1610).

[0417] Here, the single DCI may include multiple fields for scheduling multiple channels. For example, the multiple fields may include one or more of the following fields: at least one field for TCI status; at least one field for frequency resources; at least one field for time resources; at least one field for frequency resources; at least one field for HARQ-related information (e.g., HARQ number, NDI, RV); at least one field for CC (component carrier) or cell; at least one field for DMRS port; at least one field for MCS; at least one field for PUCCH resources; or at least one field for PUCCH power control command.

[0418] Using the single DCI, the first device can perform reception / transmission for the multiple channels based on a transmission technique using multiple TCI states (S1620).

[0419] For example, if multiple channels correspond to multiple downlink data channels, the corresponding transmission technique may be indicated as one of the M-TRP transmission techniques. Additionally, if multiple channels correspond to multiple uplink data channels, the corresponding transmission technique may be indicated as one of the STxMP transmission techniques.

[0420] In this regard, the transmission technique may be indicated based on the configuration of scheduling information indicated by a plurality of fields within a single DCI. For example, the configuration of the scheduling information may be based on a combination of scheduling information that is identically indicated for the plurality of channels by at least one field and scheduling information that is differently indicated for the plurality of channels by at least one other field.

[0421] According to the present disclosure, when a transmission technique utilizing multiple TCI states is applied, the value of at least one field for a TCI state among multiple fields in a single DCI may be set to indicate different TCI states for multiple channels.

[0422] In addition, according to the present disclosure, when the same scheduling information is indicated for a plurality of channels by at least one field among a plurality of fields in a single DCI, in the at least one field, a portion for the remaining channels except for a specific channel among the plurality of channels may be indicated as a null value or reserved.

[0423] Additionally, according to the present disclosure, a single DCI may further include an indicator (e.g., an explicit indicator) for the corresponding transmission technique. In this case, multiple fields within the aforementioned single DCI may be configured based on the values ​​of the indicator.

[0424] Additionally, according to the present disclosure, various M-TRP / STxMP transmission techniques can be directed based on the configuration of specific scheduling information such as the following examples.

[0425] For example, if multiple channels correspond to multiple downlink data channels, and for the multiple downlink data channels, different TCI states, the same frequency resources, the same time resources, the same HARQ-related information (e.g., the same HARQ number / NDI / RV), the same CC or cell, the same DMRS port, the same MCS, the same PUCCH resources, and the same PUCCH power control commands are indicated by multiple fields, the transmission technique may be indicated as the SFN transmission technique or the CJT transmission technique (e.g., see Embodiment 1-1).

[0426] For example, if multiple channels correspond to multiple downlink data channels, and for the multiple downlink data channels, different TCI states, same frequency resources, same time resources, same HARQ-related information (e.g., same HARQ number), same CC or cell, different DMRS ports, same PUCCH resources, and same PUCCH power control commands are indicated by multiple fields, the transmission technique may be indicated as an NCJT transmission technique (e.g., see Example 1-2).

[0427] For example, if multiple channels correspond to multiple downlink data channels, and for the multiple downlink data channels, different TCI states, same frequency resources, different time resources, same HARQ-related information (e.g., same HARQ number / NDI), same CC or cell, same PUCCH resources, and same PUCCH power control commands are indicated by multiple fields, the transmission technique may be indicated as a TD repetition transmission technique (e.g., see Embodiment 1-3).

[0428] For example, if multiple channels correspond to multiple downlink data channels, and for the multiple downlink data channels, different TCI states, different frequency resources, the same time resources, the same HARQ-related information (e.g., the same HARQ number / NDI), the same CC or cell, the same PUCCH resources, and the same PUCCH power control commands are indicated by multiple fields, the transmission technique may be indicated as an FD repetition transmission technique (e.g., see Embodiment 1-4).

[0429] For example, if multiple channels correspond to multiple downlink data channels, and for the multiple downlink data channels, different TCI states, the same time and frequency resources or resources overlapping at least one RE (resource element), different HARQ-related information (e.g., different HARQ numbers), the same CC or cell, and different DMRS ports are indicated by multiple fields, the transmission technique may be indicated as the NCJT transmission technique (e.g., see Example 1-5).

[0430] For example, if multiple channels correspond to multiple uplink data channels, and for the multiple uplink data channels, different TCI states, the same frequency resources, the same time resources, the same HARQ-related information (e.g., the same HARQ number / NDI / RV), the same CC or cell, the same DMRS port, and the same MCS are indicated by multiple fields, the transmission technique may be indicated as the SFN transmission technique or the CJT transmission technique (e.g., see Example 2-1).

[0431] For example, if multiple channels correspond to multiple uplink data channels, and for the multiple uplink data channels, different TCI states, same frequency resources, same time resources, same HARQ-related information (e.g., same HARQ number), same CC or cell, and different DMRS ports are indicated by multiple fields, the transmission technique may be indicated as an SDM transmission technique (e.g., see Example 2-2).

[0432] For example, if multiple channels correspond to multiple uplink data channels, and for the multiple uplink data channels, different TCI states, the same time resource or at least one same OFDM symbol resource, the same CC or cell, and different DMRS ports are indicated by multiple fields, the transmission technique may be indicated as the SDM transmission technique (e.g., embodiment 2-3).

[0433] The method described in the example of FIG. 16 can be performed by the wireless device (100) of FIG. 3. That is, the first device of FIG. 16 can be implemented as the wireless device (100). For example, one or more processors (102) of the wireless device (100) of FIG. 3 can be configured to receive a single DCI scheduling multiple channels and perform reception / transmission for the multiple channels based on a transmission technique utilizing multiple TCI states.

[0434] Furthermore, one or more memories (104) of the wireless device (100) may store instructions for performing the method described in the example of FIG. 16 or the examples described above when executed by one or more processors (102).

[0435] FIG. 17 is a drawing for explaining the operation of a second device according to an embodiment of the present disclosure.

[0436] Referring to FIG. 17, the second device can transmit a single DCI scheduling multiple channels to the first device (S1710).

[0437] Here, the single DCI may include multiple fields for scheduling multiple channels. For example, the multiple fields may include one or more of the following fields: at least one field for TCI status; at least one field for frequency resources; at least one field for time resources; at least one field for frequency resources; at least one field for HARQ-related information (e.g., HARQ number, NDI, RV); at least one field for CC (component carrier) or cell; at least one field for DMRS port; at least one field for MCS; at least one field for PUCCH resources; or at least one field for PUCCH power control command.

[0438] Using the single DCI, the second device can perform transmission / reception for the multiple channels based on a transmission technique using multiple TCI states (S1720).

[0439] For example, if multiple channels correspond to multiple downlink data channels, the corresponding transmission technique may be indicated as one of the M-TRP transmission techniques. Additionally, if multiple channels correspond to multiple uplink data channels, the corresponding transmission technique may be indicated as one of the STxMP transmission techniques.

[0440] In this regard, the transmission technique may be indicated based on the configuration of scheduling information indicated by a plurality of fields within a single DCI. For example, the configuration of the scheduling information may be based on a combination of scheduling information that is identically indicated for the plurality of channels by at least one field and scheduling information that is differently indicated for the plurality of channels by at least one other field.

[0441] In Fig. 17, the specific features of the configuration of the corresponding multiple fields within a single DCI, the setting of values ​​related to the indication of scheduling information, the indication of the transmission technique, the configuration of scheduling information for indicating various M-TRP / STxMP transmission techniques, etc. are the same as the description referring to Fig. 16, so the redundant description is omitted.

[0442] The method described in the example of FIG. 17 can be performed by the wireless device (200) of FIG. 3. That is, the second device of FIG. 17 can be implemented as the wireless device (200). For example, one or more processors (202) of the wireless device (200) of FIG. 3 can be configured to transmit a single DCI scheduling multiple channels and perform transmission / reception for the multiple channels based on a transmission technique utilizing multiple TCI states.

[0443] Furthermore, one or more memories (204) of the wireless device (200) may store instructions for performing the method described in the example of FIG. 17 or the examples described above when executed by one or more processors (202).

[0444] The above-described embodiments of the present disclosure may be applied independently. Additionally or alternatively, all or part of the operations of the above-described embodiments of the present disclosure may be performed in combination.

[0445] The method proposed in this disclosure is explained with a focus on examples applied to 3GPP LTE / LTE-A, 5G, and 6G systems, but can be applied to various wireless communication systems in addition to 3GPP LTE / LTE-A, 5G, and 6G systems.

Claims

1. A step of receiving, by a first device, a single DCI (downlink control information) scheduling multiple channels from a second device; and A step of performing reception or transmission for a plurality of channels based on a transmission technique using a plurality of transmission configuration indicator (TCI) states by a first device, The above single DCI includes a number of fields for scheduling the above multiple channels, A method in which the above transmission technique is directed based on the configuration of scheduling information indicated by the above plurality of fields.

2. In paragraph 1, Based on the above multiple channels corresponding to multiple downlink data channels, the transmission technique is indicated as one of the M-TRP transmission techniques, A method wherein the transmission technique is indicated as one of the STxMP transmission techniques, based on the above-mentioned multiple channels corresponding to multiple uplink data channels.

3. In paragraph 1, A method wherein the configuration of the scheduling information is based on a combination of scheduling information that is identically indicated for the plurality of channels by at least one field and scheduling information that is differently indicated for the plurality of channels by at least one other field.

4. In paragraph 1, A method wherein the value of at least one field for TCI status among the plurality of fields is set to indicate different TCI states for the plurality of channels.

5. In paragraph 1, Based on the fact that the same scheduling information is indicated for the plurality of channels by at least one field among the plurality of fields, A method wherein, in at least one field, a portion for a channel other than a specific channel among the plurality of channels is indicated as a null value or reserved.

6. In paragraph 1, The above single DCI further includes an indicator for the above transmission technique, A method in which the above multiple fields are configured based on the values ​​of the above indicators.

7. In paragraph 1, The above multiple fields are the fields described below: At least one field for TCI status; At least one field for frequency resources; At least one field for time resources; At least one field for frequency resources; At least one field for HARQ related information; At least one field for a CC (component carrier) or cell; At least one field for the DMRS port; At least one field for MCS; At least one field for PUCCH resources; or At least one field for the PUCCH power control command; A method comprising one or more of:

8. In paragraph 1, The above multiple channels correspond to multiple downlink data channels, For the above multiple downlink data channels, based on the different TCI states, the same frequency resources, the same time resources, the same hybrid automatic repeat request (HARQ) related information, the same CC (component carrier) or cell, the same DMRS (demodulation reference signal) port, the same MCS (modulation and coding scheme), the same PUCCH resources, and the same PUCCH power control command indicated by the above multiple fields, The above transmission technique is a method indicated as an SFN transmission technique or a CJT transmission technique.

9. In paragraph 1, The above multiple channels correspond to multiple downlink data channels, For the above multiple downlink data channels, based on the different TCI states, the same frequency resources, the same time resources, the same HARQ-related information, the same CC or cell, different DMRS ports, the same PUCCH resources, and the same PUCCH power control commands being indicated by the above multiple fields, The above transmission technique is a method indicated by the NCJT transmission technique.

10. In paragraph 1, The above multiple channels correspond to multiple downlink data channels, For the above multiple downlink data channels, based on the different TCI states, the same frequency resources, different time resources, the same HARQ-related information, the same CC or cell, the same PUCCH resources, and the same PUCCH power control commands being indicated by the above multiple fields, The above transmission technique is a method indicated by a TD repetition transmission technique.

11. In paragraph 1, The above multiple channels correspond to multiple downlink data channels, For the above multiple downlink data channels, based on the different TCI states, different frequency resources, the same time resources, the same HARQ-related information, the same CC or cell, the same PUCCH resources, and the same PUCCH power control commands being indicated by the above multiple fields, The above transmission technique is a method indicated by the FD repeat transmission technique.

12. In paragraph 1, The above multiple channels correspond to multiple downlink data channels, For the above multiple downlink data channels, based on the different TCI states, the same time and frequency resources or resources overlapping at least one RE (resource element), different HARQ-related information, the same CC or cell, and different DMRS ports indicated by the above multiple fields, The above transmission technique is a method indicated by the NCJT transmission technique.

13. In paragraph 1, The above multiple channels correspond to multiple uplink data channels, For the above multiple uplink data channels, based on the different TCI states, the same frequency resources, the same time resources, the same HARQ-related information, the same CC or cell, the same DMRS port, and the same MCS being indicated by the above multiple fields, The above transmission technique is a method indicated as an SFN transmission technique or a CJT transmission technique.

14. In paragraph 1, The above multiple channels correspond to multiple uplink data channels, For the above multiple uplink data channels, based on the different TCI states, the same frequency resources, the same time resources, the same HARQ-related information, the same CC or cell, and different DMRS ports being indicated by the above multiple fields, The above transmission technique is a method indicated by the SDM transmission technique.

15. In paragraph 1, The above multiple channels correspond to multiple uplink data channels, For the plurality of uplink data channels, based on the plurality of fields indicating different TCI states, the same time resource or at least one same OFDM symbol resource, the same CC or cell, and different DMRS ports, The above transmission technique is a method indicated by the SDM transmission technique.

16. One or more transceivers; and comprising one or more processors connected to said one or more transceivers, One or more of the above processors: By the first device, a single DCI (downlink control information) scheduling multiple channels is received from the second device; By means of a first device, based on a transmission technique using a plurality of transmission configuration indicator (TCI) states, reception or transmission for said plurality of channels is set to be performed, The above single DCI includes a number of fields for scheduling the above multiple channels, The above transmission technique is a device that is indicated based on the configuration of scheduling information indicated by the above multiple fields.

17. A step of transmitting a single DCI (downlink control information) scheduling multiple channels to the first device by the second device; and A step of performing transmission or reception for a plurality of channels based on a transmission technique using a plurality of transmission configuration indicator (TCI) states by a second device, The above single DCI includes a number of fields for scheduling the above multiple channels, A method in which the above transmission technique is directed based on the configuration of scheduling information indicated by the above plurality of fields.

18. One or more transceivers; and comprising one or more processors connected to said one or more transceivers, One or more of the above processors: By the second device, a single DCI (downlink control information) scheduling multiple channels is transmitted to the first device; By a second device, transmission or reception for a plurality of channels is set to be performed based on a transmission technique using a plurality of transmission configuration indicator (TCI) states, The above single DCI includes a number of fields for scheduling the above multiple channels, The above transmission technique is a device that is indicated based on the configuration of scheduling information indicated by the above multiple fields.

19. One or more processors; and A processing device comprising one or more computer memories operatively connected to said one or more processors and storing instructions for performing a method according to any one of claims 1 to 15 based on execution by said one or more processors.

20. One or more non-transitory computer-readable media storing one or more instructions that are executed by one or more processors to control the performance of a method according to any one of claims 1 to 15.

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