Method and apparatus for applying orthogonal covering code to non-terrestrial network uplink channel in wireless communication system

Abstract

The present disclosure relates to a method and an apparatus for managing uplink synchronization for a non-terrestrial base station in a wireless communication system, and an operation method of a terminal comprises: receiving downlink control information (DCI) including an uplink (UL) grant; generating uplink control information (UCI); generating a UL transport block (TB) including data; applying an orthogonal covering code (OCC) to signals included in a plurality of slots including symbols having the UCI and / or symbols having the data; and transmitting the signals in the plurality of slots, wherein the OCC includes a slot unit OCC, and, if UCI is included in a symbol at a first position of one slot from among the plurality of slots, the UCI can be included in a symbol at a first position of each of the remaining at least one slot.

Description

Method and device for applying orthogonal covering codes to non-terrestrial network uplink channels in wireless communication systems

[0001] The present disclosure relates to a non-terrestrial network (NTN) in a wireless communication system, and more particularly, to a method and apparatus for applying an orthogonal covering code (OCC) to an uplink channel.

[0002] Communication networks (e.g., 5G communication networks, 6G communication networks, etc.) are being developed to provide improved communication services compared to existing communication networks (e.g., long term evolution (LTE) and advanced LTE-A). 5G communication networks (e.g., new radio (NR) communication networks) can support frequency bands above 6 GHz as well as frequency bands below 6 GHz. That is, 5G communication networks can support FR1 bands and / or FR2 bands. 5G communication networks can support a variety of communication services and scenarios compared to LTE communication networks. For example, usage scenarios of 5G communication networks may include enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communication (URLLC), and massive Machine Type Communication (mMTC).

[0003] Compared to 5G, 6G communication networks can support a wider range of communication services and scenarios. 6G communication networks can meet requirements for ultra-high performance, ultra-high bandwidth, ultra-high space, ultra-high precision, ultra-intelligence, and / or ultra-reliability. 6G communication networks can support diverse and wide frequency bands and be applied to various usage scenarios (e.g., terrestrial communications, non-terrestrial communications, sidelink communications, etc.).

[0004] Compared to 5G, 6G communication networks can support a wider range of communication services and scenarios. 6G communication networks can meet requirements for ultra-high performance, ultra-high bandwidth, ultra-high space, ultra-high precision, ultra-intelligence, and / or ultra-reliability. 6G communication networks can support diverse and wide frequency bands and be applied to various usage scenarios (e.g., terrestrial communications, non-terrestrial communications, sidelink communications, etc.).

[0005] Communication networks (e.g., 5G communication networks, 6G communication networks, etc.) can provide communication services to terminals located on the ground. Demand for communication services for not only terrestrial but also non-terrestrial devices such as aircraft, drones, and satellites is increasing, and technologies for non-terrestrial networks (NTNs) are being discussed to address this need. NTNs can be implemented based on 5G communication technologies, 6G communication technologies, etc. For example, in NTNs, communication between satellites and ground-based communication nodes or non-terrestrial communication nodes (e.g., aircraft, drones, etc.) can be performed based on 5G communication technologies, 6G communication technologies, etc. In NTNs, satellites can function as base stations in communication networks (e.g., 5G communication networks, 6G communication networks, etc.).

[0006] Meanwhile, the technology that serves as the background for the invention is written to promote understanding of the background for the invention, and may include content that is not a prior art already known to a person with ordinary skill in the field to which the technology belongs.

[0007] The present disclosure may provide a method and device for applying an orthogonal covering code (OCC) to an uplink channel in a wireless communication system supporting a non-terrestrial network (NTN).

[0008] The present disclosure may provide a method and device for transmitting uplink control information (UCI) when applying OCC in a wireless communication system.

[0009] The present disclosure may provide a method and device for determining an item to which an OCC is applied among UCI, data, or UCI and data in a wireless communication system.

[0010] The present disclosure can provide a method and device for transmitting an item to which OCC is applied and another item to which OCC is not applied in a wireless communication system.

[0011] The present disclosure can provide a method and device for applying different OCCs to UCI-containing symbols and data symbols in a wireless communication system.

[0012] The present disclosure can provide a method and device for using a plurality of OCC sequences in a wireless communication system.

[0013] The present disclosure can provide a method and device for transmitting information related to an OCC technique in a wireless communication system.

[0014] The technical objectives to be achieved in the present disclosure are not limited to those mentioned above, and other technical tasks not mentioned can be considered by a person having ordinary skill in the technical field to which the technical configuration of the present disclosure is applied from the embodiments of the present disclosure described below.

[0015] According to one embodiment of the present disclosure, a method of operating a terminal in a wireless communication system includes receiving downlink control information (DCI) including an uplink (UL) grant, generating uplink control information (UCI), generating a UL transport block (TB) including data, applying an orthogonal covering code (OCC) to signals included in a plurality of slots including at least one of symbols including the UCI or symbols including the data, and transmitting the signals in the plurality of slots, wherein the OCC includes a slot-by-slot OCC, and when a UCI is included in a symbol at a first position of one of the plurality of slots, the UCI may be included in a symbol at a first position of each of at least one of the remaining slots.

[0016] According to one embodiment of the present disclosure, a method of operating a non-terrestrial network (NTN) base station in a wireless communication system includes transmitting downlink control information (DCI) including an uplink (UL) grant, and receiving signals transmitted in a plurality of slots, wherein the signals are included in a plurality of slots including at least one of symbols including uplink control information (UCI) or symbols including data, to which an orthogonal covering code (OCC) is applied, the OCC including a slot-by-slot OCC, and when a UCI is included in a symbol at a first position of one slot among the plurality of slots, the UCI may be included in a symbol at a first position of each of at least one of the remaining slots.

[0017] According to one embodiment of the present disclosure, in a wireless communication system, a terminal includes at least one transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the processor, control the terminal to perform operations, the operations including receiving downlink control information (DCI) including an uplink (UL) grant, generating uplink control information (UCI), generating a UL transport block (TB) including data, applying an orthogonal covering code (OCC) to signals included in a plurality of slots including at least one of symbols including the UCI or symbols including the data, and transmitting the signals in the plurality of slots, wherein the OCC includes a slot-by-slot OCC, and when a UCI is included in a symbol at a first position of one of the plurality of slots, the UCI may be included in a symbol at a first position of each of at least one of the remaining slots.

[0018] According to one embodiment of the present disclosure, in a wireless communication system, a non-terrestrial network (NTN) base station includes at least one transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the processor, control the NTN base station to perform operations, the operations including transmitting downlink control information (DCI) including an uplink (UL) grant, and receiving signals transmitted in a plurality of slots, the signals being included in a plurality of slots including at least one of symbols including uplink control information (UCI) or symbols including data, and an orthogonal covering code (OCC) being applied, the OCC including a slot-by-slot OCC, and when a UCI is included in a symbol at a first position of one of the plurality of slots, the UCI may be included in a symbol at a first position of each of at least one of the remaining slots.

[0019] The proposed technology enables preventing interference and despreading problems of uplink control information (UCI) when applying slot-based OCC to uplink in a wireless communication system supporting a non-terrestrial network (NTN).

[0020] The effects that can be obtained from the embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the technical configuration of the present disclosure is applied, from the description of the embodiments of the present disclosure below. In other words, unintended effects resulting from implementing the configuration described in the present disclosure can also be derived by those skilled in the art from the embodiments of the present disclosure.

[0021] FIG. 1a and FIG. 1b illustrate the structure of a transparent-based non-terrestrial network (NTN) according to an embodiment of the present disclosure.

[0022] FIGS. 2A to 2C illustrate the structure of a regenerative-based NTN according to an embodiment of the present disclosure.

[0023] FIG. 3 illustrates a block diagram of a communication node constituting an NTN according to an embodiment of the present disclosure.

[0024] FIG. 4 illustrates a block diagram of a communication node according to an embodiment of the present disclosure.

[0025] FIGS. 5A and 5B illustrate block diagrams of a transmission path and a reception path of a communication node according to an embodiment of the present disclosure.

[0026] FIG. 6 illustrates an example of a system frame in a wireless communication system according to an embodiment of the present disclosure.

[0027] FIG. 7 illustrates an example of a subframe in a wireless communication system according to an embodiment of the present disclosure.

[0028] FIG. 8 illustrates an example of a slot in a wireless communication system according to an embodiment of the present disclosure.

[0029] FIG. 9 illustrates the timing relationship between uplink and downlink in a wireless communication system according to an embodiment of the present disclosure.

[0030] FIG. 10A and FIG. 10B illustrate examples of protocol stacks of a user plane and a control plane in a transparent payload-based NTN in a wireless communication system according to an embodiment of the present disclosure.

[0031] FIG. 11a and FIG. 11b illustrate examples of protocol stacks of a user plane and a control plane in a regenerative payload-based NTN in a wireless communication system according to an embodiment of the present disclosure.

[0032] Figure 12 illustrates an example of an NTN providing non-terrestrial NR access to a UE by means of an NTN payload and an NTN gateway.

[0033] Figure 13 illustrates the timing relationship between objects included in NTN.

[0034] FIG. 14a illustrates an example of application of repetitive transmission and OCC in a wireless communication system according to one embodiment of the present disclosure.

[0035] FIG. 14b illustrates an example of a symbol-based OCC and a slot-based OCC in a wireless communication system according to one embodiment of the present disclosure.

[0036] FIG. 15 illustrates an example of transmitting UCI and data on a PUSCH in a wireless communication system according to one embodiment of the present disclosure.

[0037] FIG. 16 illustrates an example of a procedure for transmitting a PUSCH using OCC in a wireless communication system according to an embodiment of the present disclosure.

[0038] FIG. 17 illustrates an example of a procedure for receiving a PUSCH with OCC applied in a wireless communication system according to an embodiment of the present disclosure.

[0039] FIG. 18 illustrates an example of an OCC application procedure in a wireless communication system according to an embodiment of the present disclosure.

[0040] FIG. 19 illustrates an example of applying OCC between slots for all time positions in a wireless communication system according to an embodiment of the present disclosure.

[0041] FIG. 20 illustrates examples of applying OCC between slots for all time positions in a wireless communication system according to embodiments of the present disclosure.

[0042] FIG. 21 illustrates an example of an OCC application procedure in a wireless communication system according to an embodiment of the present disclosure.

[0043] FIG. 22 illustrates separate OCC application examples for each UCI-containing symbol and data symbol in a wireless communication system according to embodiments of the present disclosure.

[0044] FIG. 23 illustrates examples of transmitting UCI-containing symbols in different time resources for each unit in a wireless communication system according to embodiments of the present disclosure.

[0045] FIG. 24 is an example of symbols of a first resource location in a non-UCI slot in a wireless communication system according to embodiments of the present disclosure.

[0046] FIG. 25 illustrates examples of applying a slot unit OCC having a length of 2 in a wireless communication system according to an embodiment of the present disclosure.

[0047] FIGS. 26A to 26C illustrate examples of applying a slot unit OCC having a length of 4 in a wireless communication system according to an embodiment of the present disclosure.

[0048] FIG. 27 illustrates an example of an OCC application procedure in a wireless communication system according to an embodiment of the present disclosure.

[0049] FIG. 28 illustrates examples in which each terminal uses an additional OCC in a wireless communication system according to one embodiment of the present disclosure.

[0050] FIGS. 29a to 29d illustrate examples of application of multiple OCC sequences per terminal in a wireless communication system according to an embodiment of the present disclosure.

[0051] FIG. 30 illustrates an example of an application procedure of the OCC technique in a wireless communication system according to an embodiment of the present disclosure.

[0052] FIG. 31 illustrates examples of optional use of the OCC technique in a wireless communication system according to an embodiment of the present disclosure.

[0053] This disclosure may be subject to various modifications and various embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the disclosure.

[0054] While terms such as "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present disclosure, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component." The term "and / or" may refer to a combination of multiple related items described herein or to any of multiple related items described herein.

[0055] In the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.” Additionally, in the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.”

[0056] In the present disclosure, (re)transmission may mean “transmission,” “retransmission,” or “transmission and retransmission,” (re)setting may mean “setting,” “resetting,” or “setting and resetting,” (re)connection may mean “connection,” “reconnection,” or “connection and reconnection,” and (re)connection may mean “connection,” “reconnection,” or “connection and reconnection.”

[0057] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0058] The terminology used in this disclosure is only used to describe specific embodiments and is not intended to limit the present disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this disclosure, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0059] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0060] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding in describing the present disclosure, the same reference numerals will be used for identical components in the drawings, and redundant descriptions of identical components will be omitted. In addition to the embodiments explicitly described in the present disclosure, operations may be performed according to combinations of embodiments, extensions of embodiments, and / or modifications of embodiments. The performance of some operations may be omitted, and the order of operation may be changed.

[0061] In an embodiment, even if a method (e.g., transmitting or receiving a signal) performed by a first communication node among communication nodes is described, a corresponding second communication node can perform a method (e.g., receiving or transmitting a signal) corresponding to the method performed by the first communication node. That is, if an operation of a UE (user equipment) is described, a corresponding base station can perform an operation corresponding to the operation of the UE. Conversely, if an operation of a base station is described, a corresponding UE can perform an operation corresponding to the operation of the base station.

[0062] A base station may be referred to as a NodeB, an evolved NodeB, a gNodeB (next generation node B), a gNB, a device, an apparatus, a node, a communication node, a BTS (base transceiver station), a RRH (radio remote head), a TRP (transmission reception point), a RU (radio unit), an RSU (road side unit), a radio transceiver, an access point, an access node, etc. A UE may be referred to as a terminal, a device, an apparatus, a node, a communication node, an end node, an access terminal, a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, an OBU (on-broad unit), etc.

[0063] In the present disclosure, signaling may be at least one of upper layer signaling, MAC signaling, or PHY (physical) signaling. A message used for upper layer signaling may be referred to as an "upper layer message" or an "upper layer signaling message." A message used for MAC signaling may be referred to as a "MAC message" or a "MAC signaling message." A message used for PHY signaling may be referred to as a "PHY message" or a "PHY signaling message." Upper layer signaling may refer to a transmission and reception operation of system information (e.g., a master information block (MIB), a system information block (SIB)) and / or an RRC message. MAC signaling may refer to a transmission and reception operation of a MAC control element (CE). PHY signaling may refer to a transmission and reception operation of control information (e.g., downlink control information (DCI), uplink control information (UCI), sidelink control information (SCI)).

[0064] In the present disclosure, “an operation (e.g., a transmission operation) is set” may mean that “setting information for the operation (e.g., an information element, a parameter)” and / or “information instructing the performance of the operation” is signaled. “An information element (e.g., a parameter) is set” may mean that the information element is signaled. In the present disclosure, “a signal and / or a channel” may mean a signal, a channel, or “a signal and a channel,” and a signal may be used to mean “a signal and / or a channel.”

[0065] The communication system may include at least one of a terrestrial network (TN), an NTN, a 4G communication network (e.g., a long-term evolution (LTE) communication network), a 5G communication network (e.g., a new radio (NR) communication network), or a 6G communication network. Each of the 4G communication network, the 5G communication network, and the 6G communication network may include the terrestrial network and / or the NTN. The NTN may be operated based on at least one communication technology among the LTE communication technology, the 5G communication technology, and the 6G communication technology. The NTN may provide communication services in various frequency bands.

[0066] The communication networks to which the embodiments of the present disclosure are applied are not limited to those described below, and the embodiments may be applied to various communication networks (e.g., 4G communication networks, 5G communication networks, and / or 6G communication networks). Here, the term "communication network" may be used interchangeably with the term "communication system."

[0067] FIG. 1a and FIG. 1b illustrate the structure of a transparent-based non-terrestrial network (NTN) according to an embodiment of the present disclosure.

[0068] Referring to FIG. 1A, the NTN may include a satellite (110), a communication node (120), a gateway (130), a data network (140), etc. A unit including the satellite (110) and the gateway (130) may be referred to as a remote radio unit (RRU). The satellite (110) may be a low Earth orbit (LEO) satellite, a medium Earth orbit (MEO) satellite, a geostationary Earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, or an unmanned aircraft system (UAS) platform. The UAS platform may include a high altitude platform station (HAPS). The non-GEO satellite may be a LEO satellite and / or a MEO satellite.

[0069] The communication node (120) may include a communication node located on the ground (e.g., a UE, a terminal) and a communication node located off the ground (e.g., an airplane, a drone). A service link may be established between the satellite (110) and the communication node (120), and the service link may be a radio link. The satellite (110) may be referred to as an NTN payload. The gateway (130) may support multiple NTN payloads. The satellite (110) may provide a communication service to the communication node (120) using one or more beams. The shape of the reception range (footprint) of the beam of the satellite (110) may be elliptical or circular.

[0070] In NTN, three types of service links can be supported as follows:

[0071] - Earth-fixed: The service link may be provided by beam(s) that continuously cover the same geographic area at all times (e.g. Geosynchronous Orbit (GSO) satellites).

[0072] - Quasi-earth-fixed: The service link may be provided by beam(s) that cover one geographic area for a limited period and another geographic area for another period (e.g., NGSO (non-GSO) satellites that produce steerable beams).

[0073] - Earth-moving: The service link may be provided by beam(s) moving over the Earth's surface (e.g., NGSO satellites producing fixed beams or non-steerable beams).

[0074] The communication node (120) can perform communication (e.g., downlink communication, uplink communication) with the satellite (110) using 4G communication technology, 5G communication technology, and / or 6G communication technology. Communication between the satellite (110) and the communication node (120) can be performed using an NR-Uu interface and / or a 6G-Uu interface. When DC (dual connectivity) is supported, the communication node (120) can be connected to not only the satellite (110) but also other base stations (e.g., base stations supporting 4G functions, 5G functions, and / or 6G functions), and can perform DC operations based on technologies defined in the 4G standard, the 5G standard, and / or the 6G standard.

[0075] The gateway (130) may be located on the ground, and a feeder link may be established between the satellite (110) and the gateway (130). The feeder link may be a wireless link. The gateway (130) may be referred to as an 'NTN gateway.' Communication between the satellite (110) and the gateway (130) may be performed based on a NR-Uu interface, a 6G-Uu interface, or a satellite radio interface (SRI). The gateway (130) may be connected to a data network (140). A "core network" may exist between the gateway (130) and the data network (140). In this case, the gateway (130) may be connected to the core network, and the core network may be connected to the data network (140). The core network may support 4G communication technology, 5G communication technology, and / or 6G communication technology. For example, the core network may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc. Communication between the gateway (130) and the core network may be performed based on a NG-C / U interface or a 6G-C / U interface.

[0076] As shown in Fig. 1b, in a transparent payload-based NTN, a base station and a core network may exist between a gateway (130) and a data network (140).

[0077] Referring to FIG. 1B, a gateway may be connected to a base station, the base station may be connected to a core network, and the core network may be connected to a data network. Each of the base station and the core network may support 4G communication technology, 5G communication technology, and / or 6G communication technology. Communication between the gateway and the base station may be performed based on a NR-Uu interface or a 6G-Uu interface, and communication between the base station and the core network (e.g., AMF, UPF, SMF) may be performed based on a NG-C / U interface or a 6G-C / U interface.

[0078] FIGS. 2A to 2C illustrate the structure of a regenerative-based NTN according to an embodiment of the present disclosure.

[0079] Referring to FIG. 2A, the NTN may include a first satellite (211), a second satellite (212), a communication node (220), a gateway (230), a data network (1240), etc. Each of the first satellite (211) and the second satellite (212) may perform a regeneration operation (e.g., a demodulation operation, a decoding operation, a re-encoding operation, a re-modulation operation, and / or a filtering operation) on a payload received from another entity constituting the NTN (e.g., a communication node (220), a gateway (230)) and transmit the regenerated payload.

[0080] Each of the first satellite (211) and the second satellite (212) may be a LEO satellite, an MEO satellite, a GEO satellite, an HEO satellite, or a UAS platform. The UAS platform may include a HAPS. Satellite #1 (211) may be connected to the second satellite (212), and an inter-satellite link (ISL) may be established between the first satellite (211) and the second satellite (212). The ISL may operate in a radio frequency (RF) frequency or an optical band. The ISL may be optional. The communication node (220) may include a ground-based communication node (e.g., a UE, terminal) and a non-ground-based communication node (e.g., an airplane, a drone). A service link (e.g., a wireless link) may be established between satellite #1 (211) and the communication node (220). The first satellite (211) may be referred to as an NTN payload. The first satellite (211) can provide communication services to a communication node (220) using one or more beams.

[0081] The communication node (220) can perform communication (e.g., downlink communication, uplink communication) with the first satellite (211) using 4G communication technology, 5G communication technology, and / or 6G communication technology. Communication between the first satellite (211) and the communication node (220) can be performed using an NR-Uu interface or a 6G-Uu interface. When DC is supported, the communication node (220) can be connected to other base stations (e.g., base stations supporting 4G functions, 5G functions, and / or 6G functions) as well as the first satellite (211), and can perform DC operations based on technologies defined in the 4G standard, the 5G standard, and / or the 6G standard.

[0082] The gateway (230) may be located on the ground, and a feeder link may be established between the first satellite (211) and the gateway (230), and a feeder link may be established between the second satellite (212) and the gateway (230). The feeder link may be a wireless link. If an ISL is not established between the first satellite (211) and the second satellite (212), the feeder link between the first satellite (211) and the gateway (230) may be established mandatorily. Communication between the first satellite (211) and satellite #2 (212) and the gateway (230) may be performed based on an NR-Uu interface, a 6G-Uu interface, or an SRI. The gateway (230) may be connected to a data network (240).

[0083] As in the embodiments of FIGS. 2b and 2c, a core network may exist between the gateway (230) and the data network (240).

[0084] Referring to FIGS. 2b and 2c, a gateway may be connected to a core network, and the core network may be connected to a data network. The core network may support 4G communication technology, 5G communication technology, and / or 6G communication technology. For example, the core network may include AMF, UPF, SMF, etc. Communication between the gateway and the core network may be performed based on the NG-C / U interface or the 6G-C / U interface. The function of the base station may be performed by a satellite. That is, the base station may be located on the satellite. Payloads may be processed by the base station located on the satellite. Base stations located on different satellites may be connected to the same core network. A single satellite may have one or more base stations. In the NTN of FIG. A-2b, an ISL between satellites may not be established, and in the NTN of FIG. A-2c, an ISL between satellites may be established.

[0085] Meanwhile, entities (e.g., satellites, base stations, UEs, communication nodes, gateways, etc.) constituting the NTN illustrated in FIGS. 1a, 1b, 2a, 2b, and / or 2c may be configured as follows. In the present disclosure, entities may be referred to as communication nodes.

[0086] FIG. 3 illustrates a block diagram of a device according to an embodiment of the present disclosure. The structure illustrated in FIG. 3 may be understood as the structure of at least a portion of a communication node, base station, satellite, or core network entity. The wireless device (300) illustrated in FIG. A-3 may be a mobile terminal such as a smartphone, tablet PC, or wearable device, but is not limited thereto.

[0087] FIG. 3 illustrates an example of a wireless device (300) in a wireless communication system according to one embodiment of the present disclosure. The wireless device (300) according to the embodiment of the present disclosure may be a mobile terminal such as a smartphone, tablet PC, or wearable device, but is not limited thereto.

[0088] Referring to FIG. 3, the wireless device (300) may include at least one control unit (310), at least one memory (320), at least one power unit (330), at least one transceiver unit (340), at least one input unit (350), at least one output unit (360), and / or at least one antenna (370).

[0089] The control unit (310) can control the memory (320) and / or the transceiver (340), and can be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. The memory (320) can be connected to the control unit (310) and can store various information related to the operation of the control unit (310). For example, the memory (320) can perform some or all of the controls controlled by the control unit (310), or store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. The configuration of the memory is not limited in a specific manner. For example, it can be configured as at least one of a read-only memory (ROM) and a random access memory (RAM).

[0090] At least one control unit (310) may be referred to as a processor, microcontroller, microprocessor, or microcomputer. The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software in the form of codes, instructions, and / or a set of instructions. Here, the firmware or software may execute another program stored in the memory (320), such as an OS. The control unit (310) may be implemented to support beamforming or directional routing operations in which signals from at least one antenna (370) are weighted differently to effectively steer signals outgoing in a desired direction.

[0091] Additionally, at least one control unit (310) may be coupled to a backhaul or network interface. The wireless device (300) may communicate with other wireless devices through the backhaul or network interface. The control unit (310) may include at least one processor. The processor may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present disclosure are performed.

[0092] At least one transceiver (340) may be connected to the control unit (310) and may transmit and / or receive a wireless signal via at least one antenna (370). The transceiver (340) may include a transmitter and / or a receiver. The at least one transceiver (340) may transmit user data, control information, wireless signals / channels, etc. mentioned in the methods and / or operation flowcharts of the present disclosure to at least one other device. For example, the at least one transceiver (340) may be connected to at least one control unit (310) and may transmit and receive wireless signals. In addition, the at least one control unit (310) may control the at least one transceiver (340) to transmit user data, control information, or wireless signals to at least one other device. The at least one transmitter (340) may receive a signal transmitted by another wireless device from at least one antenna (370). Additionally, at least one transceiver (24) may down-convert or up-convert the received signal to generate a baseband signal. At least one antenna (370) may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports).

[0093] The input unit (350) can obtain information such as user input, video, and audio, and may include various input means such as various mechanical / electronic input means, cameras, and microphones. The output unit (360) is for providing information to users by generating output related to sight, hearing, or touch, and may include a display, a speaker, a vibration module, and the like. The wireless device (300) supplies power through the power supply unit (330), and the power supply unit (330) may include a wired / wireless charging circuit, a battery, and the like.

[0094] A more detailed example of the structure of the control unit (310) and / or the transceiver unit (340) is shown in FIG. 4. FIG. 4 illustrates a block diagram of devices performing communication according to one embodiment of the present disclosure. FIG. 4 illustrates the structure of a first communication node (400a) and a second communication node (400b) that transmit and / or receive signals. In FIG. 4, each of the first communication node (400a) and the second communication node (400b) may be a base station or a UE.

[0095] Referring to FIG. 4, a first communication node (400a) can transmit a signal to a second communication node (400b). A transmission processor (411) included in the first communication node (400a) can receive data (e.g., a data unit) from a data source (410). The transmission processor (411) can receive control information from a controller (416). The control information can include at least one of system information, RRC configuration information (e.g., information configured by RRC signaling), MAC control information (e.g., MAC CE), or PHY control information (e.g., DCI, SCI).

[0096] The transmitting processor (411) may perform a processing operation (e.g., an encoding operation, a symbol mapping operation, etc.) on data to generate data symbol(s). The transmitting processor (411) may perform a processing operation (e.g., an encoding operation, a symbol mapping operation, etc.) on control information to generate control symbol(s). In addition, the transmitting processor (411) may generate synchronization / reference symbol(s) for a synchronization signal and / or a reference signal.

[0097] The Tx MIMO processor (412) may perform spatial processing operations (e.g., precoding operations) on data symbol(s), control symbol(s), and / or synchronization / reference symbol(s). The output (e.g., symbol stream) of the Tx MIMO processor (412) may be provided to modulators (MODs) included in the transceivers (413a to 413t). The modulators (MODs) may perform processing operations on the symbol streams to generate modulation symbols, and may perform additional processing operations (e.g., analog conversion operations, amplification operations, filtering operations, upconversion operations) on the modulation symbols to generate signals. The signals generated by the modulators (MODs) of the transceivers (413a to 413t) may be transmitted via the antennas (414a to 414t).

[0098] Signals transmitted by the first communication node (400a) may be received by antennas (464a to 464r) of the second communication node (400b). Signals received by the antennas (464a to 464r) may be provided to demodulators (DEMODs) included in transceivers (463a to 463r). The demodulator (DEMOD) may perform a processing operation (e.g., a filtering operation, an amplification operation, a downconversion operation, a digital conversion operation) on the signal to obtain samples. The demodulator (DEMOD) may perform an additional processing operation on the samples to obtain symbols. The MIMO detector (462) may perform a MIMO detection operation on the symbols. The receiving processor (461) may perform a processing operation (e.g., a deinterleaving operation, a decoding operation) on the symbols. The output of the receiving processor (461) may be provided to a data sink (460) and a controller (466). For example, data may be provided to the data sink (460) and control information may be provided to the controller (466).

[0099] Meanwhile, the second communication node (400b) can transmit a signal to the first communication node (400a). The transmitting processor (468) included in the second communication node (400b) can receive data (e.g., data units) from a data source (467) and perform a processing operation on the data to generate data symbol(s). The transmitting processor (468) can receive control information from the controller (466) and perform a processing operation on the control information to generate control symbol(s). In addition, the transmitting processor (468) can perform a processing operation on a reference signal to generate reference symbol(s).

[0100] The Tx MIMO processor (469) may perform spatial processing operations (e.g., precoding operations) on data symbol(s), control symbol(s), and / or reference symbol(s). The output (e.g., symbol stream) of the Tx MIMO processor (469) may be provided to modulators (MODs) included in the transceivers (463a to 463t). The modulators (MODs) may perform processing operations on the symbol streams to generate modulation symbols, and may perform additional processing operations (e.g., analog conversion operations, amplification operations, filtering operations, upconversion operations) on the modulation symbols to generate signals. The signals generated by the modulators (MODs) of the transceivers (463a to 463t) may be transmitted via the antennas (464a to 464t).

[0101] Signals transmitted by the second communication node (400b) may be received by the antennas (414a to 414r) of the first communication node (400a). The signals received by the antennas (414a to 414r) may be provided to demodulators (DEMODs) included in the transceivers (413a to 413r). The demodulator (DEMOD) may perform a processing operation (e.g., a filtering operation, an amplification operation, a downconversion operation, a digital conversion operation) on the signal to obtain samples. The demodulator (DEMOD) may perform an additional processing operation on the samples to obtain symbols. The MIMO detector (420) may perform a MIMO detection operation on the symbols. The receiving processor (419) may perform a processing operation (e.g., a deinterleaving operation, a decoding operation) on the symbols. The output of the receiving processor (419) may be provided to a data sink (418) and a controller (416). For example, data may be provided to the data sink (418) and control information may be provided to the controller (416).

[0102] Memories (415 and 465) can store data, control information, and / or program code. Scheduler (417) can perform scheduling operations for communication. Processors (411, 412, 419, 461, 468, 469) and controllers (416, 466) illustrated in FIG. 4 may be the processor (310) illustrated in FIG. 3 and may be used to perform the methods described in the present disclosure.

[0103] FIG. 5a and FIG. 5b illustrate block diagrams of a transmission path and a reception path of a communication node according to an embodiment of the present disclosure.

[0104] Referring to FIGS. 5A and 5B, a transmission path (510) may be implemented in a communication node that transmits a signal, and a reception path (520) may be implemented in a communication node that receives a signal. The transmission path (510) may include a channel coding and modulation block (511), an S-to-P (serial-to-parallel) block (512), an N IFFT (Inverse Fast Fourier Transform) block (513), a P-to-S (parallel-to-serial) block (514), a CP (cyclic prefix) addition block (515), and an UC (up-converter) (UC) (516). The receiving path (520) may include a DC (down-converter) (521), a CP removal block (522), an S-to-P block (523), an N FFT block (524), a P-to-S block (525), and a channel decoding and demodulation block (526). Here, N may be a natural number.

[0105] In the transmission path (510), information bits may be input to a channel coding and modulation block (511). The channel coding and modulation block (511) may perform a coding operation (e.g., low-density parity check (LDPC) coding operation, polar coding operation, etc.) and a modulation operation (e.g., quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), etc.) on the information bits. The output of the channel coding and modulation block (511) may be a sequence of modulation symbols.

[0106] The S-to-P block (512) can convert modulation symbols in the frequency domain into parallel symbol streams to generate N parallel symbol streams. N can be an IFFT size or an FFT size. The N IFFT block (513) can perform an IFFT operation on the N parallel symbol streams to generate signals in the time domain. The P-to-S block (514) can convert the output (e.g., parallel signals) of the N IFFT block (513) into a serial signal to generate a serial signal.

[0107] The CP addition block (515) can insert a CP into a signal. The UC (516) can up-convert the frequency of the output of the CP addition block (515) to an RF (radio frequency) frequency. Additionally, the output of the CP addition block (515) can be filtered at the baseband before up-conversion.

[0108] A signal transmitted from a transmission path (510) may be input to a reception path (520). An operation in the reception path (520) may be the reverse operation of the operation in the transmission path (510). A DC (521) may down-convert the frequency of the received signal to a baseband frequency. A CP removal block (522) may remove a CP from a signal. The output of the CP removal block (522) may be a serial signal. An S-to-P block (523) may convert the serial signal into parallel signals. An NFFT block (524) may perform an FFT algorithm to generate N parallel signals. A P-to-S block (525) may convert the parallel signals into a sequence of modulation symbols. A channel decoding and demodulation block (526) may perform a demodulation operation on the modulation symbols and perform a decoding operation on the result of the demodulation operation to restore data.

[0109] In FIGS. 5A and 5B , Discrete Fourier Transform (DFT) and Inverse DFT (IDFT) may be used instead of FFT and IFFT. Each of the blocks (e.g., components) in FIGS. 5A and 5B may be implemented by at least one of hardware, software, or firmware. For example, in FIGS. 5A and 5B , some blocks may be implemented by software, and the remaining blocks may be implemented by hardware or a “combination of hardware and software.” In FIGS. 5A and 5B , a single block may be subdivided into multiple blocks, multiple blocks may be integrated into a single block, some blocks may be omitted, and blocks supporting other functions may be added.

[0110] FIG. 6 illustrates an example of a system frame in a wireless communication system according to an embodiment of the present disclosure.

[0111] Referring to Figure 6, time resources in a communication system can be divided into frame units. For example, system frames can be set consecutively in the time domain of the communication system. The length of a system frame can be 10 ms (milliseconds). The system frame number (SFN) can be set from #0 to #1023. In this case, 1024 system frames can be repeated in the time domain of the communication system. For example, the SFN of the system frame after system frame #1023 can be #0.

[0112] A system frame may include two half frames. A half frame may be 5 ms long. A half frame located at the beginning of the system frame may be referred to as "half frame #0," and a half frame located at the end of the system frame may be referred to as "half frame #1." A system frame may include 10 subframes. A subframe may be 1 ms long. The 10 subframes within a system frame may be referred to as "subframes #0-9."

[0113] FIG. 7 illustrates an example of a subframe in a wireless communication system according to an embodiment of the present disclosure.

[0114] Referring to Fig. 7, one subframe can include n slots, where n can be a natural number. Therefore, one subframe can be composed of one or more slots.

[0115] FIG. 8 illustrates an example of a slot in a wireless communication system according to an embodiment of the present disclosure.

[0116] Referring to Figure 8, a single slot may contain one or more symbols. A single slot, as illustrated in Figure A-8, may contain 14 symbols. The length of a slot may vary depending on the number and length of symbols contained in the slot. Alternatively, the length of a slot may vary depending on the numerology.

[0117] In a communication system, the numerology applied to physical signals and channels can be variable. The numerology can be variable to meet various technical requirements of the communication system. In a communication system applying CP (cyclic prefix)-based OFDM waveform technology, the numerology can include subcarrier spacing and CP length (or CP type). [Table 1] may be an embodiment of a method for configuring a numerology for a CP-OFDM-based communication system. At least some of the numerologies in [Table 1] may be supported depending on the frequency band in which the communication system operates. In addition, the communication system may additionally support numerologies not listed in [Table 1].

[0118] Subcarrier spacing 15kHz 30kHz 60kHz 120kHz 240kHz 480kHz OFDM symbol length [μs] 66.733.316.78.34.22.1 CP length [us] 4.762.381.190.600.300.151 Number of OFDM symbols in ms 142856112224448

[0119] When the subcarrier spacing is 15 kHz (e.g., μ=0), the slot length can be 1 ms. In this case, one system frame can contain 10 slots. When the subcarrier spacing is 30 kHz (e.g., μ=1), the slot length can be 0.5 ms. In this case, one system frame can contain 20 slots.

[0120] When the subcarrier spacing is 60 kHz (e.g., μ=2), the slot length can be 0.25 ms. In this case, one system frame can contain 40 slots. When the subcarrier spacing is 120 kHz (e.g., μ=3), the slot length can be 0.125 ms. In this case, one system frame can contain 80 slots. When the subcarrier spacing is 240 kHz (e.g., μ=4), the slot length can be 0.0625 ms. In this case, one system frame can contain 160 slots.

[0121] A symbol may be configured as a downlink (DL) symbol, a flexible (FL) symbol, or an uplink (UL) symbol. A slot consisting of only DL symbols may be referred to as a "DL slot," a slot consisting of only FL symbols may be referred to as an "FL slot," and a slot consisting of only UL symbols may be referred to as a "UL slot."

[0122] FIG. 9 illustrates the timing relationship of uplink and downlink in a wireless communication system according to an embodiment of the present disclosure.

[0123] There is one frame set in the single link, and one frame set in the downlink of each carrier. The uplink frame number i for transmission from the UE is It must be started before, and must coincide with the start of the corresponding downlink frame observed at the UE.

[0124] Here, and can be provided by adjusting the transmission timing of the synchronization procedure. However, for msgA transmission on PUSCH (physical uplink shared channel), NTA = 0.

[0125] is derived from the upper layer parameters ta-Common, ta-CommonDrift, ta-CommonDriftVariant, which if not configured am.

[0126] is computed by the UE only if the UE's position and related upper layer parameters are configured according to the transmission timing adjustment of the synchronization procedure, otherwise am.

[0127] As described above, the timing of downlink and uplink can be adjusted based on the transmission timing adjustment of the synchronization procedure. For example, the terminal can receive the value of at least one timing advance (TA) offset for the serving cell and adjust the timing based on the received at least one TA offset value. Here, the at least one TA offset value can be configured differently depending on the TCI state, the carrier, or the TRP.

[0128] The aforementioned TA (timing advance) can be determined based on the signal transmission and reception times of the random access procedure. Specifically, the terminal can identify uplink resources and determine uplink transmission power based on control information and / or configuration information received from the base station. Then, the terminal can transmit a PUSCH using the identified resources and the determined power. For example, the base station can determine the TA based on the arrival time of the preamble transmitted by the terminal.

[0129] A terminal that has performed a random access procedure can receive configuration information from the base station and transmit a PUSCH based on the configuration information. Specifically, the terminal can identify uplink resources and determine uplink transmission power based on control information and / or configuration information received from the base station. Then, the terminal can transmit a PUSCH using the identified resources and the determined power. Section 7.11 of 3GPP TS 38.213 defines the PUSCH transmission procedure for the terminal as follows.

[0130]

[0131] The aforementioned PUSCH transmission can be controlled via a physical uplink control channel (PUCCH). In NR, a terminal transmits uplink control information (UCI) to a base station via the PUCCH. The control information may include at least one of a HARQ-ACK indicating whether demodulation / decoding of a TB (transport block) received by the terminal via the PDSCH was successful, a scheduling request (SR) for requesting resource allocation from a PUSCH base station for uplink data transmission by the terminal, and channel state information (CSI), which is information for reporting the channel status of the terminal. The PUCCH can be repeatedly transmitted, and the repeated transmission procedure can be performed based on the following section 9.2.6 of 3GPP TS 38.213.

[0132]

[0133] Meanwhile, NTN reference scenarios can be defined as shown in [Table 4] below.

[0134] NTN shown in Fig. 1 NTNGEO shown in Fig. 2 Scenario A Scenario BLEO (steerable beam) Scenario C1 Scenario D1 LEO (beam moving with satellite) Scenario C2 Scenario D2

[0135] If the satellite (110) in the NTN illustrated in FIG. 1a and / or FIG. 1b is a GEO satellite (e.g., a GEO satellite supporting transparent functionality), this may be referred to as “Scenario A.” If the first satellite (211) and the second satellite (212) in the NTN illustrated in FIG. 2a, FIG. 2b, and / or FIG. 2c are each GEO satellites (e.g., a GEO supporting regeneration functionality), this may be referred to as “Scenario B.”

[0136] If the satellite (110) in the non-terrestrial network illustrated in FIG. 1a and / or FIG. 1b is a LEO satellite having steerable beams, this may be referred to as “Scenario C1.” If the satellite (110) in the non-terrestrial network illustrated in FIG. 1a and / or FIG. 1b is a LEO satellite having beams move with the satellite, this may be referred to as “Scenario C2.” If each of satellite #1 (211) and satellite #2 (212) in the non-terrestrial network illustrated in FIG. 2a, FIG. 2b, and / or FIG. 2c is a LEO satellite having steerable beams, this may be referred to as “Scenario D1.” In the non-terrestrial network illustrated in FIG. 2a, FIG. 2b, and / or FIG. 2c, if each of satellite #1 (211) and satellite #2 (212) is a LEO satellite having beams that travel with the satellite, this may be referred to as “Scenario D2.”

[0137] Parameters for the NTN reference scenarios defined in [Table 4] can be defined as shown in [Table 5] below.

[0138] Scenario A and B Scenario C and D Altitude 35,786 km 600 km 1,200 km Spectrum (service link) <6 GHz (e.g., 2 GHz) > 6 GHz (e.g., DL 20 GHz, UL 30 GHz) Maximum channel bandwidth capability (service link) 30 MHz for band < 6 GHz 1 GHz for band > 6 GHz Maximum distance between satellite and communication node (e.g., UE) at minimum elevation angle 40,581 km 1,932 km (600 km altitude) 3,131 km (1,200 km altitude) Maximum round trip delay (RTD) (propagation delay only) Scenario A: 541.46 ms (service and feeder links) Scenario B: 270.73 ms (service link only) Scenario C: (Transparent payload: service and feeder links) -25.77 ms (600 km) Altitude) -41.77ms (1200km altitude) Maximum differential delay within a cell 10.3m3.12ms (600km altitude) 3.18ms (1200km altitude) Service link NR or 6G Feeder link Radio interface defined in 3GPP or non-3GPP

[0139] Additionally, in the NTN reference scenario defined in [Table 4], the delay constraint can be defined as in [Table 6] below.

[0140] Scenario A Scenario B Scenario C1-2 Scenario D1-2 Satellite altitude 35,768 km 600 km Maximum RTD on the air interface between the base station and the UE 541.75 ms (worst case) 270.57 ms 28.41 ms 12.88 ms Minimum RTD on the air interface between the base station and the UE 477.14 ms 238.57 ms 8 ms 4 ms

[0141] FIG. 10A and FIG. 10B illustrate examples of protocol stacks of a user plane and a control plane in a transparent payload-based NTN in a wireless communication system according to an embodiment of the present disclosure.

[0142] Referring to FIGS. 10A and 10B , user data may be transmitted and / or received between a UE and a core network (e.g., UPF), and control data (e.g., control information) may be transmitted and / or received between a UE and a core network (e.g., AMF). Each of the user data and the control data may be transmitted and / or received via a satellite and / or a gateway. The protocol stack of the user plane illustrated in FIG. 10A may be applied identically or similarly to a 6G communication network. The protocol stack of the control plane illustrated in FIG. 10B may be applied identically or similarly to a 6G communication network.

[0143] FIG. 11a and FIG. 11b illustrate examples of protocol stacks of a user plane and a control plane in a regenerative payload-based NTN in a wireless communication system according to an embodiment of the present disclosure.

[0144] Referring to FIGS. 11A and 11B , user data and control data (e.g., control information) may be transmitted and / or received via an interface between a UE and a satellite (e.g., a base station). The user data may include a user protocol data unit (PDU). The protocol stack of the satellite radio interface (SRI) may be used to transmit and / or receive the user data and / or control data between the satellite and the gateway. The user data may be transmitted and / or received via a GPRS (general packet radio service) tunneling protocol (GTP)-U tunnel between the satellite and the core network.

[0145] In relation to NTN communication, an NTN may be configured to provide non-terrestrial NR access to a UE via an NTN payload and an NTN gateway. A service link may refer to a connection between an NTN payload and a UE, and a feeder link may refer to a link between an NTN gateway and an NTN payload. The configuration and procedures for the NTN, service link, and feeder link may be implemented in combination with, or partially performed or modified from, the configuration and procedures disclosed in section 16.14 of 3GPP TS 38.300.

[0146] Figure 12 illustrates an example of an NTN providing non-terrestrial NR access to a UE via an NTN payload and an NTN gateway. Figure 12 shows a service link between the NTN payload and the UE, and a feeder link between the NTN gateway and the NTN payload.

[0147] The NTN payload transparently transmits wireless protocols received from the UE via the service link to the NTN gateway via the feeder link, or vice versa. The connectivity supported by the NTN payload is as follows.

[0148] - NTN gateway can serve multiple NTN payloads.

[0149] - A single NTN payload can be served by multiple NTN gateways.

[0150] - NTN payloads can change carrier frequency before being retransmitted on the service link, or vice versa (on each feeder link).

[0151] In NTN, in addition to the network identifier, the following may apply:

[0152] - A tracking area corresponds to a fixed geographic area. Each mapping is configured in the RAN.

[0153] - Mapped cell ID as defined in Section 16.14.5.

[0154] Three types of service links are supported:

[0155] - Earth-fixed: The service link may be provided by beam(s) that continuously cover the same geographic area at all times (e.g. Geosynchronous Orbit (GSO) satellites).

[0156] - Quasi-earth-fixed: The service link may be provided by beam(s) that cover one geographic area for a limited period and another geographic area for another period (e.g., NGSO (non-GSO) satellites producing steerable beams).

[0157] - Earth-moving: The service link may be provided by beam(s) moving over the surface of the Earth (e.g., NGSO satellites producing fixed beams or non-steerable beams).

[0158] A gNB operating as an NGSO satellite can provide a quasi-Earth fixed service link or an Earth mobile service link, and a gNB operating as a GSO satellite can provide an Earth fixed service link.

[0159] Timing and synchronization are as follows:

[0160] Regarding scheduling and timing, downlink and uplink frames are aligned using an offset given by the NTA offset (see Section 4.2 of TS 38.213) from the uplink time synchronization reference point (RP). To accommodate the propagation delay of the NTN, some timing relationships are enhanced by a common timing advance (TA) and two offsets, K_offset and k_mac.

[0161] - Common TA is a timing offset configured equal to the round trip time (RTT) between the RP and NTN payloads.

[0162] - K offset is a configured scheduling offset that must be greater than or equal to the sum of the service link RTT and common TA.

[0163] - k mac is an offset that is configured to be approximately equal to the RTT between the RP and gNB.

[0164] Scheduling offset K offset is used to allow the UE sufficient processing time between downlink reception and uplink transmission (see TS 38.213). Offset k mac is used to delay the application of downlink configuration indicated by MAC CE command on PDSCH (see TS 38.213) and for estimation of UE-gNB RTT (see TS 38.321). If downlink and uplink frame timing are not aligned at the gNB, offset k mac can be provided by the network. Also, the offset k mac is used to determine the RAR window / MsgB window start time after sending Msg1 / MsgA in the random access procedure (see TS 38.213). Service link RTT, feeder link RTT, RP, common TA, k mac And TTA is as shown in Fig. 13. Fig. 13 shows the timing relationship between objects included in NTN.

[0165] The network can configure HARQ operation as follows:

[0166] - For downlink, HARQ feedback can be enabled or disabled on a per-HARQ process basis. Disabling HARQ feedback allows scheduling a HARQ process before one HARQ RTT has elapsed since the last scheduling.

[0167] - For uplink, HARQ modes (e.g., HARQ mode A or HARQ mode B) can be configured for each HARQ process. HARQ mode B allows scheduling a HARQ process before one HARQ RTT has elapsed since the last scheduling.

[0168] For HARQ processes configured to have HARQ feedback enabled / disabled, it is up to the network implementation to ensure the appropriate HARQ feedback configuration (e.g., all enabled or all disabled) for the HARQ processes used in the SPS configuration. For HARQ processes configured in HARQ mode, it is up to the network implementation to ensure the appropriate HARQ mode configuration (e.g., all HARQ mode A or all HARQ mode B) for the HARQ processes used in the configured grant (CG) configuration.

[0169] Meanwhile, in NTN, a base station can transmit system information (e.g., SIB19) containing satellite assistance information for NTN access. A UE can receive system information (e.g., SIB19) from the base station, check the satellite assistance information included in the system information, and perform communication (e.g., non-terrestrial communication) based on the satellite assistance information. SIB19 can include the information element(s) defined in [Table 7] below.

[0170] SIB19-r17 :: = SEQUENCE {ntn-Config-r17 NTN-Config-r17 OPTIONAL,t-service-r17 INTEGER(1..549755813887) OPTIONAL,referenceLocation-r17 ReferenceLocation-r17 OPTIONAL,distanceThresh-r17 INTEGER(1..65525) OPTIONAL,ntn-NeighCellConfigList-r17 NTN-NeighCellConfigList-r17 OPTIONAL,lateNonCRiticalExtension OCTET STRING...,[[ntn-NeighCellConfigListExt-v1720 NTN-NeighCellConfigList-r17 OPTIONAL,]],[[movingReferenceLocation-r18 ReferenceLocation-r17 OPTIONAL,satSwitchWithReSync-r18 SatSwitchWithReSync-r18 OPTIONAL,]]}NTN-NeighCellConfigList-r17 :: = SEQUENCE (SIZE(1..maxCellNTN-r17)) OFNTN-NeighCellConfig-r17NTN-NeighCellConfig-r17 :: = SEQUENCE {ntn-Config-r17 NTN-Config-r17 OPTIONAL,carrierFreq-r17 ARFCN-ValueNR OPTIONAL,physCellId-r17 PhysCellId OPTIONAL}SatSwitchWithReSync-r18 :: = SEQUENCE {ntn-Config-r18 NTN-Config-r17,t-ServiceStart-r18 INTEGER(1..549755813887) OPTIONAL,ssb-TimeOffset-r18 INTEGER(1..159) OPTIONAL}

[0171] NTN-Config defined in [Table 7] may include information element(s) defined in [Table 8] below.

[0172] NTN-Config-r17 ::= SEQUENCE {epochTime-r17 EpochTime-r17ntn-UISyncValidityDuration-r17 ENUMERATED {s5, s10, s15, s20, s25, s30, s35, s40, s45, s50, s55, s60, s120, s180, s240, s900}cellSpecificKoffset-r17 INTEGER(1..1023)kmac-r17 INTEGER(1..512)ta-Info-r17 TA-Info-r17ntn-PolarizationDL-r17 ENUMERATED {rhcp, lhcp, linear}ntn-PolarizationUL-r17 ENUMERATED {rhcp, lhcp, linear}ephemerisInfo-r17 EphemerisInfo-r17ta-Report-r17 ENUMERATED {enabled}...}EpochTime-r17 ::= SEQUENCE {sfn-r17 INTEGER(1..1023)subFrameNR-r17 INTEGER(1..9)}TA-Info-r17 ::= SEQUENCE {ta-Common-r17 INTEGER(1..66485757)ta-CommonDrift-r17 INTEGER(-257303..257303)ta-CommonDriftVarant-r17 INTEGER(0..28949)}

[0173] EphemerisInfo defined in [Table 8] may include information element(s) defined in [Table 9] below.

[0174] EphemerisInfo-r17 ::= CHOICE {positionVelocity-r17 PositionVelocity-r17,orbital-r17 Orbital-r17}PositionVelocity-r17 ::= SEQUENCE {positionX-r17 PositionStateVector-r17,positionY-r17 PositionStateVector-r17,positionZ-r17 PositionStateVector-r17, velocity V INTEGER (0..1048575),periapsis-r17 INTEGER (0..268435455),longitude-r17 INTEGER (0..268435455),incliating-r17 INTEGER (-67108864..67108863),meanAnomaly-r17 INTEGER (0..268435455)}PositionStateVector-r17 ::= INTEGER (-33554432..33554431)VelocityStateVector-r17 ::= INTEGER (-131072..131071)

[0175] Additionally, if there is a difference in the NTN connection setup compared to the TN connection, the NTN-parameter may include the information element(s) defined in [Table 10] below to convey the UE wireless connection capability parameters applicable to the NTN connection.

[0176] NTN-parameters-r17 ::= SEQUENCE {inactiveStateNTN-r17 ENUMERATED {supported} OPTIONAL,ra-SDT-NTN-r17 ENUMERATED {supported} OPTIONAL,srb-SDT-NTN-r17 ENUMERATED {supported} OPTIONAL,measAndMobParametersNTN-r17 MeasAndMobParameters OPTIONAL,mac-ParametersNTN-r17 Mac-Parameters OPTIONAL,phy-ParametersNTN-r17 Phy-Parameters OPTIONAL,fdd-ADD-UE-NR-CapabilitiesNTN-r17 UE-NR-CapabilityNTNAddXDD-Mode OPTIONAL,frl-ADD-UE-NR-CapabilitiesNTN-r17 UE-NR-CapabilityNTNAddFRX-Mode OPTIONAL,ue-BasedPerfMeas-ParametersNTN-r17 UE-BasedPerfMeas-Parameters-r16 OPTIONAL,son-ParametersNTN-r17 SON-Parameters-r16 OPTIONAL}

[0177] Typically, cells supported by NTN base stations have a wider radius than cells supported by TNs. Furthermore, the distance between an NTN terminal and a base station, or between a terminal and a satellite relaying signals between the base station and the terminal, is much longer than the distance between a TN terminal and a base station. Accordingly, techniques have been proposed to enhance the transmission signal power and coverage of terminals with limited transmission power in an NTN cell uplink environment for uplink signal transmission. For example, a repetition scheme has been proposed, in which a terminal transmits a specific symbol multiple times across multiple time and / or frequency resources.

[0178] Repeated transmission is a method of transmitting the same signal using more time and / or frequency resources than when repeated transmission is not applied. Therefore, repeated transmission by a specific terminal may reduce the time and / or frequency resources available to other terminals. In particular, NTN cells have a very wide cell radius, resulting in a very large number of potential serviceable terminals within the cell. However, repeated transmission to improve the transmission power of a specific terminal may result in a decrease in the total number of terminals accessible to the NTN base station. Therefore, a method that can increase uplink capacity by taking this into account is needed.

[0179] To increase capacity during uplink repetitive transmission in NTN, orthogonal cover codes (OCCs) can be applied. OCCs are a method used for transmission of some PUCCH formats in Release-18, in which signals from multiple terminals sharing the same time and / or frequency resources are distinguished by orthogonal codes such as Hadamard sequences and DFT sequences. That is, the symbols that each terminal wishes to transmit are spread using different sequences, and the spread symbols can be mapped to the same time and / or frequency resources and transmitted. The base station that receives this can detect the signals transmitted by each terminal by performing despreading on the signals in all time and / or frequency resources transmitted via OCC.

[0180] FIG. 14a illustrates an example of repeated transmission and OCC application in a wireless communication system according to one embodiment of the present disclosure. FIG. 14a illustrates an example of using a Hadamard sequence of length 4 as an OCC sequence. In FIG. 14a, solid-line blocks are obtained by multiplying the transmission symbol prior to repetition by +1, and dotted-line blocks are obtained by multiplying the transmission symbol prior to repetition by -1.

[0181] Referring to Fig. 14a, the first case (case 1) is an example of conventional repetitive transmission, and the second case (case 2) is an example of repetitive transmission using an OCC sequence. In the case of repetitive transmission using an OCC sequence, each terminal obtains spread symbols for a symbol to be transmitted by applying an OCC sequence of length 4 to the symbol to be transmitted, and transmits the spread symbols. At this time, the spread symbols refer to repetitive symbols obtained using the OCC sequence. For example, UE1 may apply the OCC sequence '+1 -1 -1 +1' to the transmitted symbol, UE2 may apply the OCC sequence '+1 -1 +1 -1' to the transmitted symbol, UE3 may apply the OCC sequence '+1 +1 -1 -1' to the transmitted symbol, and UE4 may apply the OCC sequence '+1 +1 +1 +1' to the transmitted symbol. Each UE may obtain spread symbols for the symbol to be transmitted using a different OCC sequence. At this time, the base station can obtain the symbol of UE1 by performing despreading using the OCC sequence '+1 -1 -1 +1'.

[0182] As mentioned above, PUSCH repetitive transmissions applicable to OCC are divided into symbol-based repetitive transmissions and slot-based repetitive transmissions. Symbol-based repetitive transmissions are a method in which symbols to be repetitively transmitted are transmitted identically in subsequent symbols, while slot-based repetitive transmissions are a method in which symbols to be repetitively transmitted within a slot are transmitted identically in subsequent slots. OCC can be applied to symbol-based repetitive transmissions and slot-based repetitive transmissions as described above.

[0183] Fig. 14b illustrates examples of symbol-level OCC and slot-level OCC in a wireless communication system according to an embodiment of the present disclosure. Fig. 14b is an example of using a Hadamard sequence of length 2 as an OCC sequence. In Fig. 14b, solid-line blocks are obtained by multiplying the transmission symbol before repetition by +1, and dotted-line blocks are obtained by multiplying the transmission symbol before repetition by -1. In the present disclosure, symbol-level OCC can be understood as inter-symbol OCC, and slot-level OCC can be understood as inter-slot OCC.

[0184] Referring to Fig. 14b, the first case (case 1) is an example of a symbol-based OCC when the repetition count is 2, and the second case (case 2) is an example of a slot-based OCC when the repetition count is 2. According to the symbol-based OCC, spread symbols for a transmission symbol are mapped to consecutive time resources within a slot and transmitted. According to the slot-based OCC, spread symbols for transmission symbols are mapped to the same time resources of multiple slots and transmitted.

[0185] Uplink control information (UCI) and data can be transmitted together in PUSCH where slot-based repetitive transmission is applied.

[0186] FIG. 15 illustrates an example of transmitting UCI and data on a PUSCH in a wireless communication system according to one embodiment of the present disclosure. FIG. 15 illustrates only time resources in which an OCC sequence has a length of 4 and a UCI multiplexed symbol in which UCI and data are multiplexed exists in the first slot.

[0187] Referring to FIG. 15, a UCI multiplexed symbol in which UCI and data are multiplexed is transmitted in at least one specific symbol position of the first slot to which slot-by-slot repetitive transmission is applied, but only a data symbol can be transmitted in at least one identical symbol position of other slots. That is, only data symbols that are not multiplexed with UCI are transmitted in the identical symbol positions of the second slot, the second slot, and the third slot, excluding the first slot. In this case, when OCC is applied, the signal for the symbol position where the UCI multiplexed symbol exists in a given slot does not maintain orthogonality with respect to signals from other terminals, unlike the signals for other symbol positions within the slot. Therefore, it becomes difficult for the base station to receive signals from other terminals in the UCI multiplexed symbol positions.

[0188] As mentioned above, when transmitting UCI and data via PUSCH based on repeated transmission in slot units, it is not easy to apply OCC to UCI multiplexing symbols, so a solution is needed to solve this.

[0189]

[0190] Accordingly, the present disclosure proposes a technique for transmitting UCI when applying OCC for slot-based repetitive transmission. Here, applying OCC for slot-based repetitive transmission refers to applying slot-based OCC (OCC across slots). The present disclosure proposes various embodiments for transmitting UCI when applying OCC for slot-based repetitive transmission. If necessary, at least one of the various embodiments may be selectively applied.

[0191] In the following disclosure, d k,n is the nth data symbol of the kth terminal transmitted through one repetitive transmission, and u k,nis the nth UCI symbol of the kth terminal transmitted through one repeat transmission, and m k,n can be understood as the nth UCI multiplexing symbol of the kth terminal transmitted through one repetitive transmission.

[0192]

[0193] Figure 16 illustrates an example of a procedure for transmitting a PUSCH using OCC in a wireless communication system according to an embodiment of the present disclosure. Figure 16 illustrates a method performed by a terminal. The terminal may be understood as a UE.

[0194] Referring to FIG. 16, in step S1601, a terminal receives DCI including an UL grant (uplink grant). The UL grant may include information about uplink resources for PUSCH transmission by the terminal. In other words, the terminal may receive DCI including information about uplink resources for PUSCH transmission from the base station. According to one embodiment, the DCI may further include information about an OCC. The information about the OCC may include information necessary for the terminal to apply the OCC to the PUSCH. For example, the information about the OCC may include at least one of the number of terminals to which the OCC is applied, the length of the OCC to be applied, the number of symbols per slot to which the OCC is applied, or information about transmission of items to which the OCC is not applied. The listed information about the OCC is merely an example to aid understanding, and embodiments of the present disclosure are not limited thereto. For example, the information about the OCC may further include information necessary for the terminal to apply the OCC in the proposed OCC techniques #1 to #4 described below.

[0195] In step S1603, the terminal generates an uplink transport block (UL TB) including uplink control information (UCI) and data. The terminal generates the UCI and UL TB to be transmitted via the PUSCH. To this end, although not illustrated in FIG. 16, the terminal may perform an operation for generating UCI. For example, when generating UCI including ACK / NACK information, the terminal may perform downlink data decoding, and error checking. As another example, when generating UCI including channel quality information (CQI) feedback, the terminal may receive configuration information for at least one reference signal, perform measurement, and generate information included in the CQI (e.g., precoding matrix indicator (PMI), rank indicator (RI), etc.). As another example, when generating UCI including a scheduling request (SR), the terminal may generate SR information. Additionally, the terminal can generate complex symbols for UCI according to the PUCCH format.

[0196] In step S1605, the terminal applies the OCC. The terminal applies the OCC to signals included in a plurality of slots including at least one of symbols including UCI or symbols including UL TB. Here, the OCC may include a slot-level OCC. If a symbol at a first position of one of the plurality of slots includes a UCI, the terminal may apply the OCC so that a symbol at a first position of each of at least one of the remaining slots includes the UCI. The case where the symbol at the first position includes the UCI may include at least one of a case where the symbol at the first position is a UCI symbol including only UCI or a case where the symbol at the first position is a UCI multiplexing symbol including UCI and data. For example, if a symbol at the first position of one of the plurality of slots is a UCI symbol including only UCI, the terminal may apply the OCC so that a symbol at the first position of each of the at least one of the remaining slots is also composed of a UCI symbol. As another example, if the symbol at the first position of one of the plurality of slots is a UCI multiplexing symbol including UCI and data, the terminal may apply OCC so that the symbol at the first position of each of the at least one remaining slots is also configured as a UCI multiplexing symbol. If the symbol at the first position of one of the plurality of slots does not include UCI, the terminal may apply OCC so that the symbol at the first position of each of the at least one remaining slots also does not include UCI. For example, if the symbol at the first position of one of the plurality of slots is a data symbol including only data, the terminal may apply OCC so that the symbol at the first position of each of the at least one remaining slots is also configured as a data symbol. According to one embodiment, the symbol at the second position of each of the plurality of slots may be configured by the terminal to include one of a symbol including only UCI, a symbol including only data, or a symbol including both UCI and the data.The plurality of slots may include slots as long as the length of the OCC sequence for slot-based OCC. According to one embodiment, the terminal may apply OCC using the same OCC sequence to the symbols at the first position and the symbols at the second position within the plurality of slots. According to one embodiment, the terminal may apply slot-based OCC using a first OCC sequence to symbols including UCI of the plurality of slots, and apply slot-based OCC using a second OCC sequence to symbols including only data of the plurality of slots. Here, at least some of the symbols including only data of the plurality of slots and the symbols including UCI of the plurality of slots may be transmitted in an overlapping manner in the same time and frequency resources.

[0197] At step S1609, the terminal transmits a signal. The terminal transmits the signal with OCC applied to the base station.

[0198] In the embodiment described with reference to FIG. 16, UCI or data to which OCC is not applied may be transmitted after a plurality of slots are transmitted. According to one embodiment, the terminal may obtain information (e.g., transmission method, resource information) regarding transmission of UCI or data to which OCC is not applied, and transmit at least one symbol including UCI or data to which OCC is not applied based on the obtained information. According to one embodiment, the terminal may receive information indicating application of OCC on a slot-by-slot basis from the base station, and apply OCC on a slot-by-slot basis based on the received indication information. According to one embodiment, the terminal may receive at least one of information on the number of a plurality of OCC sequences including a first OCC sequence and a second OCC sequence, and identification information of the plurality of sequences from the base station.

[0199]

[0200] Figure 17 illustrates an example of a procedure for receiving a PUSCH with OCC applied in a wireless communication system according to an embodiment of the present disclosure. Figure 17 illustrates a method performed by a base station. The base station may be understood as an NTN base station.

[0201] Referring to FIG. 17, in step S1701, the base station transmits DCI including an UL grant (uplink grant). The UL grant may include information on uplink resources for PUSCH transmission of the terminal. In other words, the base station may transmit DCI including information on uplink resources for PUSCH transmission of the terminal to the terminal. According to one embodiment, the DCI may further include information on an OCC. The information on the OCC may include information necessary for the terminal to apply the OCC to the PUSCH. For example, the information on the OCC may include at least one of the number of terminals to which the OCC is applied, the length of the OCC to be applied, the number of symbols per slot to which the OCC is applied, or information on transmission of items to which the OCC is not applied. The listed information on the OCC is merely an example to aid understanding, and embodiments of the present disclosure are not limited thereto. For example, the information on the OCC may further include information necessary for the terminal to apply the OCC in the proposed OCC techniques #1 to #4 described below.

[0202] In step S1703, the base station receives a signal. The base station may receive signals transmitted in a plurality of slots. The signals may be included in a plurality of slots, including at least one of symbols including uplink control information (UCI) or symbols including data, and may be signals to which an orthogonal covering code (OCC) is applied. Here, the OCC includes a slot-level OCC, and when a symbol at a first position of one of the plurality of slots includes a UCI, a symbol at a first position of each of at least one of the remaining slots may also include a UCI. For example, when a symbol at a first position of one of the plurality of slots is a UCI symbol including only UCI, a symbol at a first position of each of at least one of the remaining slots may also be configured as a UCI symbol. As another example, when a symbol at a first position of one of the plurality of slots is a UCI multiplexing symbol including UCI and data, a symbol at a first position of each of at least one of the remaining slots may also be configured as a UCI multiplexing symbol. If the symbol at the first position of one of the plurality of slots does not include a UCI, the symbol at the first position of each of at least one of the remaining slots may also not include a UCI. The base station can obtain the transmission symbol of the terminal by performing despreading on the plurality of slots based on the OCC sequence.

[0203] According to one embodiment, the base station may transmit information about the transmission of UCI or data to which OCC is not applied to the terminal, and receive from the terminal at least one symbol including the UCI or data to which OCC is not applied. Here, the information about the transmission of UCI or data to which OCC is not applied may include at least one of transmission method or resource information.

[0204]

[0205] Proposed OCC Scheme #1: OCC across slots for every time location (OFDM symbol)

[0206] According to the proposed OCC technique #1 of the present disclosure, a slot-wise OCC is applied to all symbol positions within each slot. That is, the same slot-wise OCC is applied to UCI multiplexing symbol(s), data symbol(s), or UCI symbol(s) within a slot. Here, data symbol(s) means symbol(s) composed of only data, and UCI symbol(s) means symbol(s) composed of only UCI. UCI multiplexing symbol(s) means symbol(s) in which UCI and data are multiplexed. A symbol position means a position of a time resource.

[0207]

[0208] Figure 18 illustrates an example of an OCC application procedure in a wireless communication system according to an embodiment of the present disclosure. Figure 18 illustrates a method performed by a terminal. The terminal may be understood as a UE.

[0209] Referring to FIG. 18, in step S1801, the terminal determines an OCC application item. The terminal determines an item to which the OCC will be applied, either UCI or data. For example, the terminal may determine the item to which the OCC will be applied, either a UCI item, a data item, or one of a UCI and data item. According to one embodiment, the item to which the OCC will be applied may be determined based on at least one of information received from the base station or whether a specified condition is satisfied.

[0210] In step S1803, the terminal generates a symbol including the determined item and applies a slot-based OCC to the generated symbol. For example, if the determined item is a UCI and data item, the terminal generates at least one UCI multiplexing symbol in which the UCI and data are multiplexed. The terminal may generate repetition symbols for the generated at least one UCI multiplexing symbol and apply a slot-based OCC to the generated repetition symbols. As another example, if at least one determined item is a UCI item, the terminal generates at least one UCI symbol. The terminal may generate repetition symbols for the generated at least one UCI symbol and apply a slot-based OCC to the generated repetition symbols. As another example, if at least one determined item is a data item, the terminal generates at least one data symbol. The terminal may generate repetition symbols for the generated at least one data symbol and apply a slot-based OCC to the generated repetition symbols. The terminal may obtain repetition symbols to which the OCC is applied by applying an OCC sequence to the repetition symbols. At this time, the repeated symbols to which OCC is applied can be mapped to specific symbol positions(s) of each of a plurality of slots corresponding to the OCC sequence length. The plurality of slots corresponding to the OCC sequence length can be understood as slots included in the OCC application range. The OCC sequence length can be understood as the OCC length, and the OCC application range can indicate slots to which one OCC sequence is applied.

[0211] As described above, the same slot-based OCC may be applied to all symbols within a slot, regardless of whether they are UCI-containing symbols. A UCI-containing symbol may include at least one of a UCI symbol consisting solely of UCI, or a UCI multiplexed symbol in which UCI and data are multiplexed.

[0212]

[0213] FIG. 19 illustrates an example of applying OCC between slots for all time positions in a wireless communication system according to an embodiment of the present disclosure. FIG. 19 illustrates an example in which an OCC sequence has a length of 4 and four UEs transmit signals, and only the symbols of one time resource position within each slot, i.e., one symbol position per slot, are illustrated. For example, one symbol position per slot may correspond to one time resource position in which a UCI multiplexing symbol exists in the first slot.

[0214] Referring to FIG. 19, when applying the existing slot-based OCC, the UE transmits a UCI multiplexing symbol (1901) in the first slot and only transmits data symbols (1902, 1903, 1904) in the other three slots.

[0215] However, when applying the proposed OCC technique #1, the UE transmits the same type of symbols at specific symbol locations of all slots by applying the same slot-wise OCC to all types of symbols. For example, each UE can transmit the UCI multiplexing symbol at a specific time resource location of all slots corresponding to the OCC sequence length by applying the slot-wise OCC to the UCI multiplexing symbol at a specific time resource location within each slot. In another example, each UE transmits the UCI symbol at a specific time resource location of all slots corresponding to the OCC sequence length by applying the slot-wise OCC to the UCI symbol at a specific time resource location within each slot. In another example, each UE transmits the data symbol at a specific time resource location of all slots corresponding to the OCC length by applying the slot-wise OCC to the data symbol at a specific time resource location within each slot.

[0216] According to the proposed OCC technique #1, in all slots corresponding to the OCC length as described above, only symbol(s) containing the same item in the specific time resource(s) to which the OCC is applied within the slot are transmitted, so orthogonality between terminals is maintained.

[0217] In one embodiment, when data symbol transmission is selected at a specific symbol position, only data symbols are transmitted at the specific symbol position of each of all slots corresponding to the OCC sequence length. In this case, UCI to be transmitted together with data from each terminal may be transmitted via separate time and / or frequency resources. For example, UCI may be transmitted separately using PUCCH with common / dedicated resources (PUCCH) using common and / or dedicated resources, or PUCCH with dedicated resources (PUCCH) using dedicated resources.

[0218] In one embodiment, when UCI symbol transmission is selected at a specific symbol position, only UCI symbols are transmitted at the specific symbol position in all slots corresponding to the OCC sequence length. In this case, data to be transmitted along with UCI from each terminal may be transmitted via separate time and / or frequency resources. For example, the data may be transmitted separately via the next iteration.

[0219] At this time, the location of the time resource within the slot containing the UCI symbol or UCI multiplexing symbol may be the same for all terminals, or may differ for each terminal. For example, the location of the time resource within the slot in which the UCI multiplexing symbol is transmitted in UE1 and the location of the time resource within the slot in which the UCI multiplexing symbol is transmitted in UE2 may be the same or different. This is as illustrated in FIG. 20.

[0220] For the proposed OCC technique #1 to work, the following conditions must be satisfied:

[0221] Condition 1: When applying slot-based OCC to each terminal, time and frequency resource allocation must be possible for the slots from the first slot to the last slot included in the OCC application range.

[0222] Condition 2-a: When applying slot-based OCC to UCI symbols or UCI multiplexing symbols, timing issues for UCI of each terminal should not occur. For example, even if a base station receives a downlink hybrid automatic repeat request (HARQ)-ACK (acknowledgement) after the last slot of the OCC coverage, there should be no problems in the operation of the HARQ process, such as downlink HARQ retransmission timing adjustment (e.g., merging or waiting). As another example, even if a base station receives CQI information after the last slot of the OCC coverage, there should be no problems in utilizing the CQI.

[0223] Condition 2-b: When applying slot-based OCC to data symbols, separate time and / or frequency resources that can transmit UCI or UCI multiplexed symbols must exist, and both the base station and the terminal must be aware of this information.

[0224] The base station can determine whether the proposed OCC technique #1 is applicable in any given situation based on the conditions described above, and can instruct the terminal whether the proposed OCC technique #1 is applicable.

[0225]

[0226] According to the proposed OCC technique #1 described above, in one OCC repetition transmission interval, each terminal must use one type of symbol among UCI multiplexing symbols, UCI symbols, or data symbols.

[0227] If the symbol type used for OCC-based repetitive transmission is not a UCI multiplexing symbol type but a UCI symbol type or a data symbol type, the terminal may require transmission method and / or resource information for items other than those included in the determined symbol type. For example, if the symbol type used for OCC-based repetitive transmission is a UCI symbol, the terminal may require transmission method and / or resource information for data items. As another example, if the symbol type used for OCC-based repetitive transmission is a data type, the terminal may require transmission method and / or resource information for UCI items.

[0228] In one embodiment, the transmission method and / or resource information for the corresponding item may be obtained from the base station. For example, the transmission method and / or resource information for the corresponding item may be obtained through UE-specific signaling, such as downlink control information (DCI), MAC CE, and / or RRC messages, or through cell-specific signaling, such as SIB, or group signaling. Such signaling may be received before or together with signaling containing information about the OCC.

[0229] In one embodiment, the terminal may apply predefined values ​​to the transmission method and / or resource information for a given item depending on the situation. Specifically, the terminal may utilize the predefined transmission method and / or resource information for the corresponding item based on at least one of the following: the type of UCI to be transmitted, the number of OCCs, or the availability of common PUCCH resources. This may be predefined in the standard.

[0230] According to one embodiment, when the symbol type used for OCC-based repetitive transmission is a UCI multiplexing symbol type, the terminal does not require transmission method and / or resource information for UCI items and data items.

[0231] According to one embodiment, when the symbol type used for OCC-based repetitive transmission is a UCI symbol type, data items that are not included items may be determined to be transmitted through the next transmission.

[0232] In one embodiment, when OCC-related information is transmitted via terminal-specific signaling, the symbol types determined for OCC-based repeated transmission may be different for each terminal.

[0233]

[0234] FIG. 20 illustrates examples of OCC application between slots for all time positions in a wireless communication system according to embodiments of the present disclosure. In FIG. 20, symbols of the same pattern represent symbols within slots included in a single OCC application range.

[0235] Referring to Fig. 20, in the first example (Ex1), each of the two terminals (UE1, UE2) transmits a UCI symbol at t1. At this time, the number of PUSCH symbols used for repetition in one slot is three, and the OCC length is 2. This means that three symbols are used for one OCC-based repeated transmission per slot, and the number of slots included in the OCC application range is two.

[0236] In the second example (Ex2), each of the six terminals (UE1 to UE6) transmits a UCI multiplexing symbol at t1. At this time, two PUSCH symbols are used for repetition in one slot, and the OCC length is 8. This means that two symbols are used for one OCC-based repeated transmission per slot, and the number of slots included in the OCC application range is 8.

[0237] In the third example (Ex3), the first terminal (UE1) transmits a UCI multiplexing symbol at t3, the second terminal (UE2) transmits a UCI symbol at t2, and the third terminal (UE3) transmits data symbols at all symbol positions. At this time, the number of PUSCH symbols used for repetition in one slot is 6, and the OCC length is 4. This means that 6 symbols are used for one OCC-based repeated transmission per slot, and the number of slots included in the OCC application range is 4.

[0238] In the first, second, and third examples, t within a specific slot i Symbols located at (1≤i≤n) are the same symbol locations in other slots, t i The symbols located in the OCC range are spread out. The receiver receives t in each slot. i By performing despreading on the symbols located at (1≤i≤n), the transmission symbols of each terminal can be obtained. Here, n is the number of PUSCH symbols used for repetition in one slot.

[0239]

[0240] Proposed OCC Scheme #2: OCC across slots for UCI symbols or UCI multiplexed symbols

[0241] According to the proposed OCC technique #2 of the present disclosure, a symbol-wise OCC is applied to UCI symbols or UCI multiplexing symbols within a given slot of each terminal, and a separate OCC is applied to data of the same time resource in the remaining slots and / or other time resources within the same slot.

[0242]

[0243] Figure 21 illustrates an example of an OCC application procedure in a wireless communication system according to an embodiment of the present disclosure. Figure 21 illustrates a method performed by a terminal. The terminal may be understood as a UE.

[0244] Referring to FIG. 21, in step S2101, the terminal applies a symbol-by-symbol OCC to a UCI-containing symbol of a first time resource. The terminal can obtain spread UCI-containing symbols by applying a symbol-by-symbol OCC to a UCI-containing symbol to be transmitted through the first time resource. The spread UCI-containing symbols can be mapped to consecutive time resources within a UCI slot. The UCI-containing symbol can include at least one of a UCI symbol composed only of UCI, or a UCI multiplexed symbol in which UCI and data are multiplexed. The time resources within the UCI slot can include time resources corresponding to the symbol-by-symbol OCC length. For example, the time resources within the UCI slot can include a first time resource within the first slot and at least one other time resource adjacent to the first time resource within the first slot.

[0245] In step S2103, the terminal applies slot-wise OCC to data symbols of the second time resource. The terminal can obtain spread data symbols by applying slot-wise OCC to data symbols to be transmitted through the second time resource. The spread data symbols can be mapped to the second time resource within the UCI slot and to the second time resource at the same location within at least one other slot.

[0246]

[0247] According to one embodiment, the terminal can apply a slot-wise OCC to data symbols of a first time resource in other slots. The other slots refer to slots other than the first slot, which is a UCI slot, among a plurality of slots used for a single repeated transmission. Therefore, the first time resource in other slots refers to a time resource at the same position as the position of the time resource to which the UCI-containing symbol in the first slot is mapped among the time resources in other slots. The terminal can obtain spread data symbols by applying a slot-wise OCC to data symbols to be transmitted through the first time resource in other slots. The spread data symbols can be mapped to the first time resource in other slots. The length of the slot-wise OCC applied to the data symbols of the first time resource in other slots can be shorter than the length of the slot-wise OCC applied to the second time resource.

[0248]

[0249] As described above, when a total of R slots are to be used for a single repeated transmission, each terminal applies a slot-based OCC of length R to symbols at positions(s) that do not correspond to UCI symbols or UCI multiplexing symbols among symbol positions in all slots. In the first slot or a given slot among all slots to which the slot-based OCC is applied, the symbol-based OCC is separately applied to the UCI symbols or UCI multiplexing symbols of each terminal so that they can be distinguished from data symbols. Here, the first slot or a given slot including UCI may be referred to as a UCI slot. In the remaining slots that do not include a UCI symbol or a UCI multiplexing symbol, i.e., non-UCI slots, the slot-based OCC or the symbol-based OCC is applied or no signal is transmitted at positions identical to positions of UCI symbols or UCI multiplexing symbols.

[0250] This approach resolves potential UCI issues that may arise when applying OCC without using additional time and / or frequency resources. Furthermore, when the slot containing the UCI symbol is the first slot, it ensures that all UCI symbols or UCI multiplexed symbols from each terminal are received in the first slot, similar to the existing method of repeating transmission without OCC.

[0251] Figure 22 illustrates separate OCC application examples for each UCI-containing symbol and data symbol in a wireless communication system according to embodiments of the present disclosure. Figure 22 assumes that the length of the slot-based OCC, i.e., the number of repetitions, is 4, and the number of symbols used for repeated transmission per slot is 3.

[0252] Referring to FIG. 22, each of the two terminals (UE1, UE2) applies a symbol-unit OCC of length 2 to the UCI multiplexing symbol in the first slot, and a slot-unit OCC of length 4 to the last symbol in each slot.

[0253]

[0254] The proposed OCC technique #2, as described above, is divided into cases where UCI symbols are transmitted in a UCI slot and cases where UCI multiplexing symbols are transmitted. When transmitting UCI symbols, the base station can quickly acquire UCI without performing demultiplexing using signals from the remaining slots when a UCI slot is received. When transmitting UCI multiplexing symbols, UCI can be acquired according to the same multiplexing rules as when following the existing PUSCH UCI multiplexing.

[0255] According to an embodiment of the present disclosure, when applying a symbol-based OCC in a UCI slot, an OCC such as (

[0010] ,

[0001] ) can be applied. That is, the proposed OCC technique #2 allows each terminal to transmit a UCI-containing symbol in a UCI slot, without each terminal spreading the UCI-containing symbol, and to transmit the UCI symbol or UCI multiplexing symbol in different time resources.

[0256] Figure 23 illustrates examples of transmitting UCI-containing symbols on different time resources for each transmission in a wireless communication system according to embodiments of the present disclosure. Figure 23 assumes that the length of the slot-based OCC, i.e., the number of repetitions, is 4, and the number of symbols used for repeated transmission per slot is 3.

[0257] Referring to FIG. 23, UE1 can transmit UCI multiplexing symbols only in the first symbol of the first slot by applying the symbol-wise OCC sequence [1, 0] to the UCI-containing symbols. UE2 can transmit UCI multiplexing symbols only in the second symbol of the first slot by applying the symbol-wise OCC sequence [0, 1] to the UCI-containing symbols. UE1 and UE2 can transmit UCI multiplexing symbols in different time resources within a UCI slot.

[0258]

[0259] According to an embodiment of the present disclosure, a slot-based OCC of a first length may be applied to data symbol(s) of a first resource position among symbols in a non-UCI slot. In this case, the first length may be shorter than a second length of a slot-based OCC applied to symbol(s) of a second resource position of the UCI slot and non-UCI slots. The first resource position refers to the same position(s) as the position of a UCI-containing symbol in the UCI slot.

[0260] According to an embodiment of the present disclosure, a symbol-based OCC of a third length may be applied to data symbol(s) in a first resource location among symbols in a non-UCI slot. The third length may be identical to the length of a symbol-based OCC applied to a UCI-containing symbol in a UCI slot.

[0261] According to an embodiment of the present disclosure, a signal may not be transmitted at a first resource location among symbols in a non-UCI slot.

[0262] FIG. 24 is an example of symbols in a first resource location within a non-UCI slot in a wireless communication system according to embodiments of the present disclosure. FIG. 24 is an example where the first slot is a UCI slot including a UCI-containing symbol.

[0263] Referring to Fig. 24, the first case (case 1) is an example in which slot-based OCC is applied to the first and second symbol positions of the second slot, the third slot, and the fourth slot. Data d of the first and second symbol positions of the second slot, the third slot, and the fourth slot k,0 and d k,1 The data symbols to be transmitted are spread across multiple slots by applying an OCC of length 3 to the slot units.

[0264] Case 2 is an example in which symbol-based OCC is applied to the first and second symbol positions of the second, third, and fourth slots. Data d of the first and second symbol positions of the second, third, and fourth slots k,0 and d k,1 The data symbols to be transmitted are spread within each slot by applying an OCC of symbol unit length 2.

[0265] Case 3 is an example in which the first and second symbol positions of the second slot, the third slot, and the fourth slot are not used.

[0266]

[0267] For the operation of the proposed OCC technique #1 as described above, the following conditions must be satisfied.

[0268] Condition 1: The number of symbols per slot for applying OCC to each terminal must not be less than the number of terminals to which the proposed OCC technique #2 is applied in the same OCC application range or the length of the symbol unit OCC for the UCI-containing symbol in the proposed OCC technique #2. For example, as shown in FIG. 24, when the number of symbols per slot for applying OCC is 3, OCCs of symbol units of up to length 3 or up to 3 terminals can be supported for the UCI-containing slot in the first slot. The base station can determine whether the proposed OCC technique #2 can be applied based on the conditions described above in a given situation.

[0269] Considering the explanations above, the following information may be required for the application of the proposed OCC technique #2.

[0270] - Location of UCI slots,

[0271] - A set of OCCs to be used for symbol unit OCC for symbols including UCI in the UCI slot and a sequence identifier for each terminal;

[0272] - The length of the symbol unit OCC for symbols including UCI in the UCI slot,

[0273] - Symbol positions to which symbol unit OCC is applied for symbols including UCI within the UCI slot;

[0274] - Whether to apply slot-based OCC or symbol-based OCC to the same position symbols in the remaining non-UCI slots,

[0275] - OCC set and sequence ID for each terminal to be used when applying slot-based OCC or symbol-based OCC to the same position symbols in the remaining non-UCI slots;

[0276] - The type of symbol to be transmitted in the same position symbols within the remaining non-UCI slots (e.g., UCI symbol, UCI multiplexing symbol, data symbol, or not used);

[0277] - When applying slot-based OCC to symbols in the same position within the remaining non-UCI slots, whether each terminal transmits symbols at the corresponding position, etc.

[0278] Information such as those described above may be obtained via UE-specific signaling, such as DCI, MAC CE, and / or RRC messages from a base station, cell-specific signaling, such as SIB, or group signaling. Such signaling may be received prior to signaling containing information about the OCC, or may be received together with signaling containing information about the OCC.

[0279] In one embodiment, the terminal can apply predefined values ​​depending on the situation. Specifically, the terminal can apply predefined values ​​based on the type of UCI to be transmitted, the number of OCCs, the resource requirements for each terminal, and / or the status of the existing scheduling request (SR) / buffer status report (BSR). For example, information for the proposed OCC technique #2 can be predefined as follows.

[0280] - The location of the UCI slot where the UCI-containing symbol is transmitted can be predefined as the first slot of the OCC transmission unit or the slot where the first actual repetition is performed.

[0281] - The OCC set and sequence ID to be used for symbol unit OCC of symbols including UCI in the UCI slot can be predefined to use a sequence of the same sequence ID in the same OCC set as the sequence used for the existing slot unit OCC or in another OCC set (e.g. Hadamard -> DFT).

[0282] - The length of the symbol unit OCC of UCI-containing symbols within a UCI slot can be predefined to use the same length as the existing slot unit OCC for data symbols transmitted in the UCI slot.

[0283] - The symbol positions to which the symbol unit OCC of symbols including UCI in the UCI slot is applied can be predefined so that the position of the UCI multiplexing symbol in the existing repetitive transmission without applying OCC is the start position, the middle position, or the last position.

[0284] - Whether slot-wise OCC or symbol-wise OCC is applied to the same position symbols in the remaining non-UCI slots can be predefined through the specification as always applying slot-wise OCC, applying symbol-wise OCC, or not transmitting.

[0285] - The OCC set and sequence ID to be used when applying slot-based OCC or symbol-based OCC to the same position symbols in the remaining non-UCI slots may be predefined to use a sequence of the same sequence ID in the same OCC set or a different OCC set (e.g., Hadamard -> DFT) as the sequence used in the existing slot-based OCC, or may be predefined to use a sequence of a changed sequence ID through a predefined rule when the length of the OCC applied compared to the existing slot-based OCC is changed.

[0286] - The type of symbol to be transmitted in the same position symbols in the remaining non-UCI slots can be defined to always transmit UCI symbols, UCI multiplexing symbols, or data symbols, or to have a default value of always not transmitting any symbols, or to be determined according to the OCC sequence ID used by each terminal.

[0287] - When applying slot-based OCC to symbols in the same position in the remaining non-UCI slots, whether or not to transmit a symbol in the corresponding position of each terminal can be determined based on a rule that can determine whether or not to transmit through a sequence ID. This is because, as shown in the second example of Fig. 26, when applying slot-based OCC to symbols in the same position in the remaining non-UCI slots, the number of supported terminals may decrease due to a reduction in the OCC length caused by non-application of the UCI slot.

[0288]

[0289] FIG. 25 illustrates examples of applying a slot unit OCC having a length of 2 in a wireless communication system according to an embodiment of the present disclosure.

[0290] Referring to Figure 25, the first example (Ex1) is an example in which the number of terminals is 2 and the number of PUSCH symbols used for repetition within one slot is 4. In this case, m k,1 and d k,1 An OCC of symbol unit of length 2 is applied to the symbol positions, and an OCC of slot unit of length 2 can be applied to other symbol positions.

[0291] The second example (Ex2) is an example in which the number of terminals is 2 and the number of PUSCH symbols used for repetition in one slot is 6. In this case, m k,1 and d k,3 An OCC of symbol unit of length 2 is applied to the symbol positions, and an OCC of slot unit of length 2 can be applied to other symbol positions.

[0292] The third example (Ex2) is an example in which the number of terminals is 2 and the number of PUSCH symbols used for repetition in one slot is 12. In this case, m k,1 , m k,2 , d k,1 , d k,2An OCC of symbol unit of length 2 is applied to the symbol positions, and an OCC of slot unit of length 2 can be applied to other symbol positions.

[0293]

[0294] FIGS. 26A to 26C illustrate examples of applying a slot unit OCC having a length of 4 in a wireless communication system according to an embodiment of the present disclosure.

[0295] Figure 26a is an example in which the number of terminals is 4 and the number of PUSCH symbols used for repetition within one slot is 6. In this case, m k,1 , d k,2 , d k,3, d k,4 An OCC of symbol unit of length 4 is applied to the symbol positions, and an OCC of slot unit of length 4 can be applied to other symbol positions.

[0296] Figure 26b is an example in which the number of terminals is 4 and the number of PUSCH symbols used for repetition within one slot is 6. In this case, m k,1 OCC of symbol unit of length 4 is applied to d k,1 , d k,6 For the slot unit OCC of length 4 is applied, and for other d k,2 , d k,3 , d k,4 , d k,5 A slot-wise OCC of length 3 may be applied. In addition, UE4 does not transmit symbols at positions t2 to t5 within the second to fourth slots. This means that d k,2 , d k,3 , d k,4 , d k,5 Since the OCC length applied is 3, the number of UEs that can transmit symbols in the corresponding time resource is limited to a maximum of 3.

[0297] Figure 26c is an example in which the number of terminals is 4 and the number of PUSCH symbols used for repetition within one slot is 6. In this case, m 1,1 , m 2,1 , m 3,1 , m 4,1 OCC of symbol unit of length 2 is applied for m 1,1 and m 2,1 Time resource location and m 3,1 and m 4,1 The time resource location may be different. Also, d k,2 OCC of symbol unit of length 4 is applied to d k,1 , d k,6 For the slot unit OCC of length 4 is applied, d k,3 , d k,4 , d k,5 , d k,7 A slot-wise OCC of length 2 may be applied. UE3 and UE4 do not transmit symbols at positions t2 to t5 in the third and fourth slots. This means that d k,3 , d k,4 , d k,5 , d k,7 Since the OCC length applied is 2, the number of UEs that can transmit symbols in the corresponding time resource is limited to a maximum of 2.

[0298]

[0299] Proposed OCC Scheme #3: Additional OCC Sequence for UCI Symbols or UCI Multiplexed Symbols

[0300] According to the proposed OCC technique #3 of the present disclosure, a separate OCC sequence is applied to a UCI-containing symbol. When a slot-based OCC is applied, the UCI-containing symbol of each terminal is treated as a separate terminal, and a separate OCC sequence different from the OCC sequence applied to the data symbol at the same position is allocated and / or applied to the UCI-containing symbol, thereby distinguishing the UCI-containing symbol and the data symbols of each terminal. This allows each terminal to operate multiple OCC resources. When the OCC is applied to a number of terminals smaller than the maximum number R of terminals supported by a slot-based OCC with a length of R, a separate OCC sequence is used for the UCI-containing slot, so that the UCI-containing symbol can be received by the base station without interference.

[0301] In situations where OCC is applied, a smaller number of terminals may be allocated relative to the OCC length to improve transmission rates per terminal. In this case, each terminal may transmit UCI-containing slots using a separate OCC sequence and data symbols using a different OCC sequence. The positions of the UCI-containing symbols of each terminal (e.g., time resource positions within a slot) do not need to be identical. This is because the UCI-containing symbols of each terminal can be transmitted together with the data symbols of other terminals. Alternatively, to improve the performance of the UCI-containing symbols, the UCI-containing symbols may be additionally repeatedly transmitted on different time and / or frequency resources.

[0302]

[0303] Figure 27 illustrates an example of an OCC application procedure in a wireless communication system according to an embodiment of the present disclosure. Figure 27 illustrates a method performed by a terminal. The terminal may be understood as a UE.

[0304] Referring to FIG. 27, in step S2701, the terminal determines a plurality of OCC sequences. The terminal may receive at least one of information regarding the number of OCC sequences to be used in the terminal or identification information of the plurality of sequences, and determine the plurality of OCC sequences based on the received information.

[0305] In step S2703, the terminal applies different OCC sequences to the UCI-containing symbols and data symbols. For example, the terminal may apply a first OCC sequence to the UCI-containing symbols and a second OCC sequence to the data symbols to be transmitted overlappingly with the UCI-containing symbols on the same time and frequency resources. That is, by using multiple OCC sequences, the terminal can transmit at least some of the data symbols and the UCI symbols overlappingly on the same time and frequency resources.

[0306]

[0307]

[0308] Figure 28 illustrates examples of each terminal utilizing an additional OCC in a wireless communication system according to one embodiment of the present disclosure. Figure 28 illustrates an example where two terminals apply a slot-based OCC of length 4. With an OCC of length 4, a total of four signals are distinguished within the same time and / or frequency resources. Accordingly, each terminal utilizes two OCC sequences.

[0309] Referring to FIG. 28, in the first case (case 1), each terminal performs slot-wise OCC for UCI multiplexing symbols using one sequence, and performs slot-wise OCC for data symbols using another sequence. At this time, since different sequences are used for the UCI multiplexing symbols and data symbols, data symbols can be transmitted in the time and / or frequency resources in which the UCI multiplexing symbols are transmitted.

[0310] In the second case, each terminal performs slot-wise OCC for UCI multiplexing symbols and data symbols using one sequence, and performs slot-wise OCC for data symbols using another sequence.

[0311] By using different sequences for the UCI multiplexing symbols and data symbols, the UCI multiplexing symbols and / or data symbols for each OCC sequence of each terminal can be distinguished through despreading at the base station.

[0312]

[0313] For the proposed OCC technique #3 to work, the following conditions must be satisfied:

[0314] Condition 1: When applying slot-based OCC to each terminal, time and frequency resource allocation up to the last slot of the OCC application range must be possible.

[0315] Condition 2: There should be no timing issues with the UCI of each terminal. For example, even if the base station receives a downlink HARQ-ACK after the last slot of the OCC coverage, there should be no issues with the operation of the HARQ process, such as downlink HARQ retransmission timing adjustment (e.g., merging or waiting). Another example is that even if the base station receives CQI information after the last slot of the OCC coverage, there should be no issues with CQI utilization.

[0316] Condition 3: The number of terminals transmitting data within a single OCC coverage area within the same time and / or frequency resources must be less than the length of the OCC. For example, the difference between the OCC length and the number of terminals may indicate the total number of UCI-containing symbols that can be transmitted using a separate OCC sequence.

[0317] The base station can determine whether to apply the proposed OCC technique #3 based on the conditions described above and instruct the terminal whether to apply the proposed OCC technique #3.

[0318]

[0319] Considering the above explanations, the application of the proposed OCC technique #3 may require additional signaling of at least one piece of information as follows:

[0320] - Terminals to which the proposed OCC technique #3 will be applied,

[0321] - UCI-containing symbols to which the proposed OCC technique #3 is applied in terminals that must transmit multiple UCI-containing symbols,

[0322] - Whether to perform additional data transmission,

[0323] - OCC sequence ID required for dissemination of UCI and additional data, or

[0324] - Number of OCC sequences and sequence ID to be used per terminal

[0325]

[0326] According to one embodiment, the aforementioned information may be obtained via UE-specific signaling, such as DCI, MAC CE, and / or RRC messages from a base station, or via cell-specific signaling or group signaling, such as SIB. Such signaling may be received prior to signaling containing information about the OCC, or may be received together with signaling containing information about the OCC.

[0327] According to one embodiment, the terminal may apply a predefined value depending on the situation. Specifically, the terminal may apply a predefined value depending on at least one of the type of UCI to be transmitted, the number of OCCs, or the availability of common PUCCH resources. The predefined value depending on the situation may be predefined in the specification. Specifically, the terminal to which the proposed OCC technique #3 is to be applied may be selected by the base station. In this case, the base station may select the number of terminals to which repeated transmission and slot-by-slot OCC application are to be instructed so that the number of terminals has a value smaller than the OCC sequence length. According to one embodiment, the proposed OCC technique #3 may be configured to be applied to all UCI-containing symbols. According to one embodiment, it may be configured to transmit all data that can be transmitted using beam resources by default. According to one embodiment, the ID of the additional OCC sequence required for spreading the UCI and additional data may be separately calculated based on the sequence length and the sequence ID of each terminal. The number of OCC sequences and sequence IDs to be used for each terminal can be calculated separately based on at least one of the data request amount to be transmitted, the sequence length, or the sequence IDs used by default when the proposed OCC technique #3 is not applied.

[0328]

[0329] FIGS. 29a to 29d illustrate examples of application of multiple OCC sequences per terminal in a wireless communication system according to an embodiment of the present disclosure.

[0330] FIG. 29a illustrates a case where the number of terminals is 2, the OCC length is 4, and the number of PUSCH symbols used for repetition within one slot is 4. Here, blocks with the same pattern mean symbols included in the same OCC application range. Referring to FIG. 29a, UE1 applies slot-wise OCC to UCI multiplexing symbols using the first OCC sequence (OCC sequence 1), and applies slot-wise OCC to data symbols using the second OCC sequence (OCC sequence 2). UE2 applies slot-wise OCC to UCI multiplexing symbols using the third OCC sequence (OCC sequence 3), and applies slot-wise OCC to data symbols using the fourth OCC sequence (OCC sequence 4). At this time, data symbols are not transmitted using the OCC sequence for the UCI multiplexing symbol.

[0331] Figure 29b illustrates a case where the number of terminals is 2, the OCC length is 4, and the number of PUSCH symbols used for repetition within one slot is 4. Here, blocks with the same pattern mean symbols included in the same OCC application range. Referring to Figure 29b, UE1 applies slot-wise OCC to UCI multiplexing symbols using the first OCC sequence, and applies slot-wise OCC to data symbols using the second OCC sequence. UE2 applies slot-wise OCC to UCI multiplexing symbols using the third OCC sequence, and applies slot-wise OCC to data symbols using the fourth OCC sequence. At this time, in order to improve SNR and / or diversity, UCI multiplexing symbols are transmitted for every time resource within each slot.

[0332] FIG. 29c illustrates a case where the number of terminals is 3, the OCC length is 6, and the number of PUSCH symbols used for repetition within one slot is 3. Here, blocks with the same pattern mean symbols included in the same OCC application range. Referring to FIG. 29c, UE1 applies slot-wise OCC to UCI multiplexing symbols and data symbols using the first OCC sequence, and applies slot-wise OCC to data symbols using the second OCC sequence. UE2 applies slot-wise OCC to UCI multiplexing symbols and data symbols using the third OCC sequence, and applies slot-wise OCC to data symbols using the fourth OCC sequence. UE3 applies slot-wise OCC to UCI multiplexing symbols and data symbols using the fifth OCC sequence, and applies slot-wise OCC to data symbols using the sixth OCC sequence. Here, some data symbols may be transmitted using the OCC sequence for the UCI multiplexing symbols, and the positions of the UCI multiplexing symbols may be different for each UE.

[0333] FIG. 29d illustrates a case where the number of terminals is 2, the OCC length is 8, and the number of PUSCH symbols used for repetition within one slot is 6. Here, blocks with the same pattern mean symbols included in the same OCC application range. Referring to FIG. 29d, UE1 uses 6 OCC sequences, and UE2 uses 2 sequences. Specifically, UE1 applies slot-wise OCC for UCI multiplexing symbols and data symbols using the 5th OCC sequence, and applies slot-wise OCC for data symbols using the 1st OCC sequence, the 2nd OCC sequence, the 3rd OCC sequence, the 4th OCC sequence, and the 6th sequence. UE2 applies slot-wise OCC for UCI multiplexing symbols and data symbols using the 7th sequence, and applies slot-wise OCC for data symbols using the 8th sequence. Here, some data symbols may be transmitted using the OCC sequence for the UCI multiplexing symbol. Additionally, UE1 can utilize six sequences for higher throughput.

[0334]

[0335] Proposed OCC Technique #4: Selective Use of Proposed Embodiments

[0336] According to the proposed OCC technique #4 of the present disclosure, one of the proposed OCC techniques #1 to #3 can be selectively utilized. At least two of the proposed OCC techniques #1 to #3 can be applied through the standard, and one technique can be selectively applied depending on the conditions. For example, one of the proposed OCC techniques #1 to #3 can be selected and applied based on whether the application conditions described in the proposed OCC techniques #1 to #3 are satisfied. The basic conditions for applying each technique are summarized as in [Table 11].

[0337] Proposed OCC technique #11) When applying slot-based OCC to each terminal, it must be possible to allocate time and frequency resources up to the last slot of the OCC coverage. 2-a) When applying slot-based OCC of the proposed OCC technique #1 to symbols including UCI, there must be no timing problems with the UCI of each terminal. 2-b) Alternatively, when applying slot-based OCC of the proposed OCC technique #1 to data symbols, there must be separate time and / or frequency resources for transmitting symbols including UCI, and both the base station and the terminal must know the information about these. Proposed OCC technique #2 The number of symbols per slot for applying OCC to each terminal must not be less than the number of terminals to which the proposed OCC technique #2 is applied within the same OCC coverage or the length of symbol-based OCC for symbols including UCI in the proposed OCC technique #2. Proposed OCC technique #31) When applying slot-based OCC to each terminal, it must be possible to allocate time and frequency resources up to the last slot of the OCC coverage. 2) There must not be any timing problems with the UCI of each terminal. 3) The number of terminals included in one OCC application range in the same time and / or frequency resources must be less than the length of the OCC.

[0338] In addition to the basic conditions in [Table 11], the following additional conditions may be considered for optional use.

[0339] A) Conditions related to the expected delay performance (e.g., latency, timing relationship) when applying each technique.

[0340] B) Conditions related to the expected transmission performance (e.g., throughput) when applying each technique.

[0341] C) Conditions related to the expected error performance (e.g., block error rates) when applying each technique.

[0342] D) Conditions related to signaling overhead required when applying each technique according to the definition in the standard.

[0343] Additional condition A) is related to the timing issue of the basic condition of the proposed OCC technique #1 and proposed OCC technique #3. Through the basic condition, it is examined whether a fatal error request occurs due to a timing issue (e.g., whether it is applicable), and through the additional condition A), the delay performance according to timing (e.g., the degree of delay time when applied) can be identified.

[0344] Additionally, in additional condition B), the yield of each terminal or the total yield of terminals included in the OCC application unit may be considered, and in additional condition C), the error performance of data or UCI of each terminal or all terminals included in the OCC application range may be considered.

[0345] When multiple OCC techniques exist as described above, the base station determines applicable OCC techniques by examining the basic conditions of each OCC technique. At this time, if the basic conditions of multiple techniques are satisfied and there are multiple applicable OCC techniques, the base station can additionally select and apply one technique using additional conditions. The base station can transmit an indication to each terminal indicating that the selected technique has been applied. For example, the base station can transmit information about the selected technique to the terminal through UE-specific signaling such as DCI, MAC CE, RRC message, cell-specific signaling such as SIB, or group signaling.

[0346]

[0347] FIG. 30 illustrates an example of an application procedure of the OCC technique in a wireless communication system according to an embodiment of the present disclosure. FIG. 30 illustrates signal exchange between a terminal (3010) and a base station (3020).

[0348] Referring to FIG. 30, in step S3001, the base station (3020) determines an OCC technique to be applied. The base station determines at least one applicable candidate OCC technique based on whether a basic condition set for each of a plurality of OCC techniques is satisfied. If only one candidate OCC technique is determined to be applicable, the base station determines that one candidate OCC technique is the applicable OCC technique. If two or more candidate OCC techniques are determined to be applicable, the base station may select one of the two or more candidate OCC techniques based on additional conditions and determine the selected candidate OCC technique as the applicable OCC technique.

[0349] In step S3003, the base station (3020) instructs the terminal (3010) on the determined OCC technique. The base station (3020) may transmit a signal including information on the determined OCC technique to the terminal (3010). The signal including information on the determined OCC technique may be transmitted via UE-specific signaling such as DCI, MAC CE, RRC message, cell-specific signaling such as SIB, or group signaling. At this time, the base station (3020) may transmit information on the determined OCC technique to the terminal (3010). The information on the determined OCC technique may include at least one of the number of terminals to which the OCC is applied, the length of the OCC, the number of symbols per slot to which the OCC is applied, or information related to transmission of items to which the OCC is not applied. According to one embodiment, the information on the determined OCC technique may further include the necessary information described in the aforementioned proposed OCC mechanisms #1 to 3.

[0350] In step S3005, the terminal (3010) applies the indicated OCC technique. The terminal (3010) can apply the OCC technique indicated by the base station (3020) to the UCI and / or data symbols to be transmitted.

[0351] In step S3007, the terminal (3010) transmits a signal to which the OCC technique is applied to the base station (3020). The terminal (3010) may transmit a signal including UCI and / or data symbols to which the OCC technique is applied to the base station (3020). At this time, the base station (3020) may receive the PUSCH based on information about the determined OCC technique.

[0352]

[0353] FIG. 31 illustrates examples of selective use of OCC techniques in a wireless communication system according to an embodiment of the present disclosure. In FIG. 31 , PR1 may be understood as proposed OCC technique #1, PR2 may be understood as proposed OCC technique #2, and PR3 may be understood as proposed OCC technique #3.

[0354] Referring to Figure 31, Case 1 illustrates a case where support for PR1 and PR2 is possible and SIB is used for indication. The base station can check whether the conditions for PR1 and PR2 are satisfied. If the conditions for PR2 are satisfied, the base station can instruct the terminal to use PR2 via SIB.

[0355] Case 2 is an example where support for both PR1 and PR3 is possible and SIB is used for indication. The base station can check whether the conditions for PR1 and PR3 are met. If both conditions for PR1 and PR3 are met, the base station can determine that PR1 has better performance based on the additional conditions. In this case, the base station can instruct the terminal to use PR1 via SIB.

[0356] Case 3 is an example where support for PR2 and PR3 is possible, and DCI via PDCCH is used for indication. The base station can check whether the conditions for PR2 and PR3 are met. If the conditions for PR3 are met, the base station can instruct the terminal to use PR3 via PDCCH.

[0357] Case 4 is an example where PR1, PR2, and PR3 are supported, and PDCCH (e.g., DCI) is used for indication. The base station can check whether the conditions for PR1, PR2, and PR3 are satisfied. If both the conditions for PR1 and PR2 are satisfied, the base station can decide to use PR2 based on the expected UCI reception times for PR1 and PR2. For example, the base station may decide to use PR2 because it is expected to receive UCI within a shorter time between PR1 and PR2. The base station can instruct the terminal to use PR2 via the PDCCH.

[0358] Case 5 illustrates a case where PR1, PR2, and PR3 are supported, and PDSCH (e.g., MAC CE or RRC) is used for indication. The base station can check whether the conditions for PR1, PR2, and PR3 are met. If the conditions for PR1 are met, the base station can decide to use PR1. The base station can instruct the terminal to use PR1 via the PDSCH.

[0359] Case 6 is an example where PR1, PR2, and PR3 are supported, and SIB is used for indication. The base station can check whether the conditions for PR1, PR2, and PR3 are met. If the conditions for PR1 and PR3 are met, the base station can decide to use PR3 based on the throughput of PR1 and PR3. The base station can instruct the terminal to use PR3 via SIB.

[0360]

[0361] The methods according to the present disclosure may be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., either singly or in combination. The program instructions recorded on the computer-readable medium may be those specifically designed and configured for the present disclosure or may be known and available to those skilled in the computer software art.

[0362] Examples of computer-readable media include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

[0363] While some aspects of the present disclosure have been described in the context of a device, they may also represent a description of a corresponding method, wherein a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be described as a corresponding block or item or a feature of a corresponding device. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, at least one or more of the most significant method steps may be performed by such a device.

[0364] A programmable logic device (e.g., a field-programmable gate array) may be used to perform some or all of the functions of the methods described in this disclosure. The field-programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described in this disclosure. In general, the methods are preferably performed by some hardware device.

[0365] Although the present disclosure has been described with reference to the above embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present disclosure without departing from the spirit and scope of the present disclosure as set forth in the claims below.

Claims

1. In a method of operating a terminal in a wireless communication system, Receiving DCI (downlink control information) including UL (uplink) grant; Generating uplink control information (UCI); Creating a UL TB (transport block) containing data; Applying an orthogonal covering code (OCC) to signals included in a plurality of slots including at least one of symbols including the UCI or symbols including the data; and Including transmitting the signals in the plurality of slots, The above OCC includes a slot unit OCC, A method wherein, if a UCI is included in a symbol at a first position of one of the plurality of slots, a UCI is included in a symbol at a first position of each of at least one of the remaining slots.

2. In claim 1, A method wherein the symbol at the second position of each of the plurality of slots includes one of a symbol including only the UCI, a symbol including only the data, or a symbol including both the UCI and the data.

3. In claim 2, Obtaining information about the transmission of UCI or data to which the above OCC does not apply; and Further comprising transmitting at least one symbol including UCI or data to which the OCC is not applied based on the acquired information, A method in which the information about the transmission includes at least one of transmission method or resource information.

4. In claim 2, A method in which symbols including UCI or data to which the above OCC is not applied are transmitted after transmitting the plurality of slots.

5. In claim 1, A method wherein the plurality of slots include slots having a length equal to the length of the OCC sequence for the OCC of the slot unit.

6. In claim 1, Applying the above OCC, A method comprising applying the OCC using the same OCC sequence to the symbols of the first position and the symbols of the second position within the plurality of slots.

7. In claim 1, A method further comprising receiving information from a base station indicating application of the OCC of the slot unit.

8. In claim 1, Applying the above OCC, Applying slot-based OCC using a first OCC sequence to symbols including UCI of the plurality of slots; and A method comprising applying a slot-by-slot OCC using a second OCC sequence to symbols containing only data of the plurality of slots.

9. In claim 8, A method in which at least some of the symbols containing only the above data and the symbols containing the UCI are transmitted in an overlapping manner in the same time and frequency resources.

10. In claim 8, A method further comprising receiving, from a base station, at least one of information about the number of a plurality of OCC sequences including the first OCC sequence and the second OCC sequence and identification information of the plurality of sequences.

11. In a method of operating a NTN (non-terrestrial network) base station in a wireless communication system, Transmitting DCI (downlink control information) including UL (uplink) grant; and comprising receiving signals transmitted from multiple slots, The above signals are included in a plurality of slots including at least one of symbols including uplink control information (UCI) or symbols including data, and an orthogonal covering code (OCC) is applied. The above OCC includes a slot unit OCC, A method wherein, if a UCI is included in a symbol at a first position of one of the plurality of slots, a UCI is included in a symbol at a first position of each of at least one of the remaining slots.

12. In claim 11, Transmitting information about the transmission of UCI or data to which the OCC does not apply to the terminal; and Further comprising receiving at least one symbol including UCI or data to which the OCC is not applied from the terminal, A method in which the information about the transmission includes at least one of transmission method or resource information.

13. In a wireless communication system, at a terminal, At least one transmitter / receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed by said processor, control said terminal to perform operations; The above actions are, Receiving DCI (downlink control information) including UL (uplink) grant; Generating uplink control information (UCI); Creating a UL TB (transport block) containing data; Applying an orthogonal covering code (OCC) to signals included in a plurality of slots including at least one of symbols including the UCI or symbols including the data; and Including transmitting the signals in the plurality of slots, The above OCC includes a slot unit OCC, A terminal, wherein if a UCI is included in a symbol at a first position of one of the plurality of slots, a UCI is included in a symbol at a first position of each of at least one of the remaining slots.

14. In claim 13, A terminal, wherein the symbol of the second position of each of the plurality of slots includes one of a symbol including only the UCI, a symbol including only the data, or a symbol including both the UCI and the data.

15. In claim 14, The above actions are, Obtaining information about the transmission of UCI or data to which the above OCC does not apply; and Further comprising transmitting at least one symbol including UCI or data to which the OCC is not applied based on the acquired information, The information about the above transmission includes at least one of transmission method and resource information.

16. In claim 14, A method in which symbols including UCI or data to which the above OCC is not applied are transmitted after transmitting the plurality of slots.

17. In claim 13, Applying the above OCC, A terminal comprising applying the OCC using the same OCC sequence to the symbols of the first position and the symbols of the second position within the plurality of slots.

18. In claim 13, Applying the above OCC, Applying slot-based OCC using a first OCC sequence to symbols including UCI of the plurality of slots; and A terminal including applying a slot-based OCC using a second OCC sequence to symbols containing only data of the plurality of slots.

19. In claim 13, A terminal in which at least some of the symbols including only the above data and the symbols including the UCI are transmitted in an overlapping manner in the same time and frequency resources.

20. In a non-terrestrial network (NTN) base station in a wireless communication system, At least one transmitter / receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed by said processor, control said NTN base station to perform operations; The above actions are, Transmitting DCI (downlink control information) including UL (uplink) grant; and comprising receiving signals transmitted from multiple slots, The above signals are included in a plurality of slots including at least one of symbols including uplink control information (UCI) or symbols including data, and an orthogonal covering code (OCC) is applied. The above OCC includes a slot unit OCC, An NTN base station, wherein if a UCI is included in a symbol at a first position of one of the plurality of slots, a UCI is included in a symbol at a first position of each of at least one of the remaining slots.

Images