Method for performing communication in wireless communication system, and apparatus

Abstract

A method by which a device performs wireless communication, and an apparatus supporting same are provided. The method may comprise steps in which a first device: acquires an uplink timing advance; and performs communication on the basis of an uplink downlink configuration related to the uplink timing advance.

Description

Method and device for performing communication in a wireless communication system

[0001] The present disclosure relates to a wireless communication system.

[0002] 5G NR, the successor to LTE (long-term evolution), is a new clean-slate mobile communications system characterized by high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low-frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.

[0003] The 6G (wireless communication) system aims to achieve (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) low energy consumption for battery-free Internet of Things (IoT) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be divided into four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can satisfy the requirements as shown in Table 1 below. For example, Table 1 can represent an example of the requirements of a 6G system.

[0004] Maximum data rate per device: 1 Tbps, E2E latency: 1 ms, Maximum spectral efficiency: 100 bps / Hz, Mobility support: Up to 1000 km / hr, Satellite integration: Fully AI, Fully autonomous driving, Fully XR, Fully haptic communication

[0005] According to one embodiment of the present disclosure, a method may be provided. For example, the method may include: a step of a first device acquiring an uplink timing advance; and a step of the first device performing communication based on an uplink / downlink configuration associated with the uplink timing advance.

[0006] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause the first device to: obtain an uplink timing advance; and perform communication based on uplink and downlink settings related to the uplink timing advance.

[0007] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause a first device to: obtain an uplink timing advance; and perform communication based on uplink and downlink settings related to the uplink timing advance.

[0008] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium storing commands may be provided. For example, the commands, when executed, may cause a first device to: acquire an uplink timing advance; and perform communication based on uplink and downlink settings associated with the uplink timing advance.

[0009] According to one embodiment of the present disclosure, a method may be provided. For example, the method may include: a step of a second device receiving information related to an uplink timing advance; and a step of the second device performing communication based on an uplink / downlink configuration related to the uplink timing advance.

[0010] According to one embodiment of the present disclosure, a second device may be provided. For example, the second device may include at least one transceiver; at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause the second device to: receive information related to an uplink timing advance; and perform communication based on an uplink / downlink configuration related to the uplink timing advance.

[0011] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause a second device to: receive information related to an uplink timing advance; and perform communication based on an uplink / downlink configuration related to the uplink timing advance.

[0012] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium storing commands may be provided. For example, the commands, when executed, may cause a second device to: receive information related to uplink timing advance; and perform communication based on uplink and downlink settings related to the uplink timing advance.

[0013] Figure 1 illustrates a device-to-device communication procedure according to one embodiment of the present disclosure.

[0014] FIG. 2 illustrates a radio protocol architecture according to one embodiment of the present disclosure.

[0015] FIG. 3 illustrates the structure of a wireless frame according to one embodiment of the present disclosure.

[0016] FIG. 4 illustrates a slot structure of a frame according to one embodiment of the present disclosure.

[0017] FIG. 5 illustrates an example of a BWP according to one embodiment of the present disclosure.

[0018] FIG. 6 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.

[0019] FIG. 7 illustrates an example of a communication scenario based on a 6G system according to one embodiment of the present disclosure.

[0020] FIGS. 8A and 8B illustrate a non-terrestrial network scenario according to one embodiment of the present disclosure.

[0021] FIG. 9 illustrates a procedure for downlink transmission and reception according to one embodiment of the present disclosure.

[0022] FIG. 10 illustrates a procedure for uplink transmission and reception according to one embodiment of the present disclosure.

[0023] FIG. 11 illustrates an example of an NTN according to one embodiment of the present disclosure.

[0024] FIG. 12 shows examples of K_offset and K_mac according to one embodiment of the present disclosure.

[0025] FIG. 13 illustrates an example of a UE-specific TA and a common TA according to one embodiment of the present disclosure.

[0026] FIG. 14 illustrates an example of an uplink-downlink timing relationship according to one embodiment of the present disclosure.

[0027] FIG. 15 illustrates an example of TA mismatch within a beam / cell according to one embodiment of the present disclosure.

[0028] FIG. 16 illustrates a procedure for performing communication based on uplink timing advance and uplink downlink settings according to one embodiment of the present disclosure.

[0029] FIG. 17 illustrates an example of a DL / UL configuration based on UL TA information and / or DL / UL collision information, according to one embodiment of the present disclosure.

[0030] FIG. 18 illustrates an example of a relative DL / UL configuration according to a UL TA value difference, according to one embodiment of the present disclosure.

[0031] FIG. 19 illustrates an example of DL / UL configuration adjustment according to an application cycle, according to one embodiment of the present disclosure.

[0032] FIG. 20 illustrates an example of a DL / UL configuration according to application of a time axis dual pattern according to one embodiment of the present disclosure.

[0033] FIG. 21 illustrates an example of a DL / UL configuration based on periodic DL / UL pattern activation / deactivation according to one embodiment of the present disclosure.

[0034] FIG. 22 illustrates an example of UL TA pre-compensation based DL / UL configuration and UL TA application according to one embodiment of the present disclosure.

[0035] FIG. 23 illustrates a method for a first device to perform wireless communication according to one embodiment of the present disclosure.

[0036] FIG. 24 illustrates a method for a second device to perform wireless communication according to one embodiment of the present disclosure.

[0037] Fig. 25 shows a communication system (1) according to one embodiment of the present disclosure.

[0038] FIG. 26 illustrates a wireless device according to one embodiment of the present disclosure.

[0039] FIG. 27 illustrates a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0040] FIG. 28 illustrates a wireless device according to one embodiment of the present disclosure.

[0041] FIG. 29 illustrates a mobile device according to one embodiment of the present disclosure.

[0042] In this disclosure, "A or B" can mean "only A," "only B," or "both A and B." In other words, "A or B" in this disclosure can be interpreted as "A and / or B." For example, "A, B or C" in this disclosure can mean "only A," "only B," "only C," or "any combination of A, B and C."

[0043] As used herein, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0044] In the present disclosure, “at least one of A and B” may mean “only A,” “only B,” or “both A and B.” Additionally, in the present disclosure, the expressions “at least one of A or B” or “at least one of A and / or B” may be interpreted identically to “at least one of A and B.”

[0045] Additionally, in the present disclosure, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0046] Additionally, parentheses used in the present disclosure may mean "for example." Specifically, when indicated as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information." In other words, "control information" in the present disclosure is not limited to "PDCCH," and "PDCCH" may be proposed as an example of "control information." Furthermore, even when indicated as "control information (e.g., PDCCH)", "PDCCH" may be proposed as an example of "control information."

[0047] In the following explanation, ‘when, if, in case of’ can be replaced with ‘based on’.

[0048] Technical features individually described in one drawing in this disclosure may be implemented individually or simultaneously.

[0049] In the present disclosure, higher layer parameters may be parameters set for the terminal, preset, or predefined. For example, a base station or network may transmit higher layer parameters to the terminal. For example, the higher layer parameters may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0050] In the present disclosure, "setting or defining" may be interpreted as being set or preset to a device through predefined signaling (e.g., SIB, MAC, RRC, DCI (downlink control information), etc.) from a base station or a network. In the present disclosure, "setting or defining" may be interpreted as being set or preset to a device through predefined signaling (e.g., MAC, RRC, SCI (sidelink control information), device-to-device signaling control information, etc.) from another device. In the present disclosure, "setting or defining" may be interpreted as being set or preset to a device.

[0051] In the present disclosure, a user equipment (UE) may refer to a device, a portable device, a wireless device, etc. In the present disclosure, a base station (BS) may refer to a radio access network (RAN) node, a non-terrestrial network (NTN) cell / node, a transmission reception point (TRP), a network, an integrated access and backhaul (IAB) node, a device, a portable device, a wireless device, etc.

[0052] The technology proposed in the present disclosure can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented with wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0053] The technology proposed in this disclosure can be implemented with 6G wireless technology and applied to various 6G systems. For example, 6G systems can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0054] FIG. 1 illustrates a device-to-device communication procedure according to one embodiment of the present disclosure. The embodiment of FIG. 1 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0055] Referring to FIG. 1, in step S101, a first device and a second device can perform synchronization. For example, the first device can be a terminal and / or at least one of the devices proposed in the present disclosure. For example, the second device can be a base station, a network, a RAN node, an NTN node / cell, a TRP, a terminal and / or at least one of the devices proposed in the present disclosure. For example, the first device can perform an initial cell search operation. For example, the first device can detect at least one synchronization signal transmitted by the second device according to a predefined rule. Here, for example, the synchronization signal can include a plurality of synchronization signals classified according to a structure or purpose (e.g., a primary synchronization signal, a secondary synchronization signal, etc.). Through this, the first device can identify the boundaries of the frame, subframe, time unit, slot, and / or symbol of the second device, and the first device can obtain information about the second device (e.g., a cell identifier).

[0056] In step S103, the first device can obtain system information transmitted by the second device. For example, the system information may include information related to the properties, characteristics, and / or capabilities of the second device required to connect to the second device and use the service. For example, the system information may be classified according to content (e.g., whether it is essential for connection), transmission structure (e.g., the channel used, whether it is provided on-demand), etc. For example, the system information may be classified into a master information block (MIB) and a system information block (SIB). For example, if necessary, the first device may transmit a signal requesting system information before receiving the system information. For example, the request and provision of system information may be performed after a random access procedure described below.

[0057] In step S105, the first device and the second device can perform a random access procedure. For example, the first device can transmit and / or receive at least one message (e.g., a random access preamble, a random access response message, etc.) for the random access procedure based on information related to a random access channel of the second device obtained through system information (e.g., channel location, channel structure, structure of supported preamble, etc.). For example, the first device can transmit a preamble (e.g., Msg1) through the random access channel, the first device can receive a random access response message (e.g., Msg2), the first device can transmit a message (e.g., Msg3) including information related to the first device (e.g., identification information) to the second device using scheduling information included in the random access response message, and the first device can receive a message (e.g., Msg4) for contention resolution and / or connection establishment. For example, Msg1 and Msg3 can be sent and received as one message (e.g., MsgA), and / or Msg2 and Msg4 can be sent and received as one message (e.g., MsgB).

[0058] In step S107, the first device and the second device may perform signaling of control information. Here, for example, the control information may be defined in various layers, such as a layer that controls a connection (e.g., a radio resource control (RRC) layer), a layer that handles mapping between logical channels and transport channels (e.g., a media access control (MAC) layer), a layer that handles physical channels (e.g., a physical (PHY) layer), etc. For example, the first device and the second device may perform at least one of signaling for establishing a connection, signaling for determining settings related to communication, and / or signaling for indicating allocated resources. For example, the control information may be signaled / transmitted via a control channel. For example, the control information and / or the control channel may be used to schedule at least one of data, a data channel (e.g., a shared channel), and / or control information on the data channel.

[0059] In step S109, the first device and the second device may transmit and / or receive data. For example, the first device and the second device may process, transmit, and / or receive data based on signaling of control information. For example, when transmitting data, the first device or the second device may perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and / or resource mapping on the information bits. For example, when receiving data, the first device or the second device may perform at least one of signal extraction from resources, waveform demodulation for each antenna, signal arrangement considering layer mapping, constellation demapping, descrambling, and / or channel decoding.

[0060] For example, the layers of a radio interface protocol between a first device and a second device can be divided into L1 (layer 1), L2 (layer 2), L3 (layer 3), etc. For example, a physical layer belonging to the first layer can provide an information transfer service using a physical channel, and an RRC (radio resource control) layer located in the third layer can play a role in controlling radio resources between the first device and the second device. For this purpose, for example, the RRC layer can exchange RRC messages between the first device and the second device.

[0061] FIG. 2 illustrates a radio protocol architecture according to an embodiment of the present disclosure. The embodiment of FIG. 2 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted. For example, (a) of FIG. 2 may illustrate a radio protocol stack of a user plane for uplink communication or downlink communication, and (b) of FIG. 2 may illustrate a radio protocol stack of a control plane for uplink communication or downlink communication. For example, (c) of FIG. 2 may illustrate a radio protocol stack of a user plane for device-to-device communication, and (d) of FIG. 2 may illustrate a radio protocol stack of a control plane for device-to-device communication.

[0062] For example, the physical layer can provide information transmission services to upper layers using physical channels. For example, the physical layer can be connected to the upper layer, the medium access control (MAC) layer, through a transport channel. For example, data can be transmitted between the MAC layer and the physical layer through the transport channel. For example, transport channels can be classified according to how and with what characteristics data is transmitted over the wireless interface. For example, data can be transmitted between different physical layers, for example, between the physical layers of a first device and a second device, through a physical channel. For example, the physical channel can be modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and time and frequency can be utilized as radio resources.

[0063] For example, the MAC layer can provide services to the upper layer, the radio link control (RLC) layer, through logical channels. For example, the MAC layer can provide a mapping function from multiple logical channels to multiple transport channels. For example, the MAC layer can provide a logical channel multiplexing function by mapping multiple logical channels to a single transport channel. For example, the MAC sublayer can provide data transmission services on logical channels.

[0064] For example, the RLC layer can perform concatenation, segmentation, and reassembly of RLC service data units (SDUs). For example, to guarantee the various quality of service (QoS) required by radio bearers (RBs), the RLC layer can provide three operating modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). For example, AM RLC can provide error correction through automatic repeat request (ARQ).

[0065] For example, the RRC (radio resource control) layer can be defined only in the control plane. For example, the RRC layer can be responsible for controlling logical channels, transport channels, and physical channels in relation to the configuration, re-configuration, and release of radio bearers. For example, an RB can mean a logical path provided by a first layer (e.g., a physical layer) and a second layer (e.g., a MAC layer, an RLC layer, a PDCP (packet data convergence protocol) layer, a SDAP (service data adaptation protocol) layer, etc.) for data transmission between a first device and a second device.

[0066] For example, the functions of the PDCP layer in the user plane may include the forwarding of user data, header compression, and ciphering. For example, the functions of the PDCP layer in the control plane may include the forwarding of control plane data and ciphering / integrity protection.

[0067] For example, establishing an RB can refer to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service, and setting specific parameters and operating methods for each. For example, RBs can be divided into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). For example, SRBs can be used as a channel to transmit RRC messages in the control plane, while DRBs can be used as a channel to transmit user data in the user plane.

[0068] For example, if an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal will be in the RRC_CONNECTED state, and if not, it may be in the RRC_IDLE state. For example, in the case of NR, the RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state can release the connection with the base station while maintaining the connection with the core network.

[0069] For example, a downlink transmission channel may include at least one of a broadcast channel (BCH) for transmitting system information, and / or a downlink shared channel (SCH) for transmitting user traffic or control messages. For example, traffic or control messages of a downlink multicast or broadcast service may be transmitted through the downlink SCH, or may be transmitted through a separate downlink multicast channel (MCH). Meanwhile, an uplink transmission channel may include at least one of a random access channel (RACH) for transmitting initial control messages, and / or an uplink shared channel (SCH) for transmitting user traffic or control messages. For example, a logical channel located above a transmission channel and mapped to the transmission channel may include at least one of a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and / or a multicast traffic channel (MTCH).

[0070] FIG. 3 illustrates the structure of a wireless frame according to an embodiment of the present disclosure. The embodiment of FIG. 3 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0071] Referring to FIG. 3, for example, a radio frame may be used in uplink transmission, downlink transmission, and / or device-to-device transmission. For example, a radio frame may have a length of 10 ms and may be defined as two 5 ms half-frames (HF). For example, a half-frame may include five 1 ms subframes (SF). For example, a subframe may be divided into one or more slots, and the number of slots within a subframe may be determined according to a subcarrier spacing (SCS). For example, each slot may include 12 or 14 OFDM (A) symbols, depending on a cyclic prefix (CP).

[0072] For example, when normal CP is used, each slot can contain 14 symbols. For example, when extended CP is used, each slot can contain 12 symbols. Here, for example, the symbols can contain OFDM symbols (or CP-OFDM symbols), SC-FDMA (single carrier-FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0073] Table 2 below shows the number of symbols per slot (N) depending on the SCS setting (u) when normal CP or extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is an example.

[0074] CP type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slotNormal CP15kHz (u=0)1410130kHz (u=1)1420260kHz (u=2)14404120kHz (u=3)14808240kHz (u=4)1416016Extended CP60kHz (u=2)12404

[0075] For example, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single terminal. Accordingly, the (absolute time) interval of time resources (e.g., subframes, slots, or transmit time intervals (TTIs)) composed of the same number of symbols may be set differently between the merged cells. For example, in the present disclosure, time resources such as subframes, slots, TTIs, etc. may be referred to as time units.

[0076] For example, multiple numerologies, or SCSs, may be supported to support various services. For example, a 15 kHz SCS may support wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS may support dense urban areas, lower latency, and wider carrier bandwidth. For example, a 60 kHz or higher SCS may support bandwidths greater than 24.25 GHz to overcome phase noise.

[0077] FIG. 4 illustrates a slot structure of a frame according to an embodiment of the present disclosure. The embodiment of FIG. 4 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0078] Referring to FIG. 4, for example, a slot may include multiple symbols in the time domain. For example, a carrier may include multiple subcarriers in the frequency domain. For example, a resource block (RB) may be defined as multiple consecutive subcarriers in the frequency domain. For example, a bandwidth part (BWP) may be defined as multiple consecutive (P)RBs ((physical) resource blocks) in the frequency domain, and may correspond to one numerology (e.g., SCS, CP length, etc.). For example, a carrier may include at most N BWPs (where N is a positive integer). For example, data communication may be performed through an activated BWP. For example, each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped to it.

[0079] For example, a BWP may be a contiguous set of PRBs in a given numerology. For example, a PRB may be selected from a contiguous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0080] For example, the BWP may be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE may not monitor the downlink radio link quality in a DL BWP other than the active DL BWP on the PCell (primary cell). For example, the UE may not receive a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), or a channel state information-reference signal (CSI-RS) (except for radio resource management (RRM)) outside of the active DL BWP. For example, the UE may not trigger channel state information (CSI) reporting for an inactive DL BWP. For example, the UE may not transmit a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) outside of the active UL BWP. For example, for downlink, the initial BWP can be given as a set of consecutive resource blocks (RBs) for the remaining minimum system information (RMSI) CORESET (control resource set) (set by the physical broadcast channel (PBCH)). For uplink, for example, the initial BWP can be given by the system information block (SIB) for the random access procedure. For example, the default BWP can be set by a higher layer. For example, the initial value of the default BWP can be the initial DL BWP.For energy saving, if a terminal does not detect DCI (downlink control information) for a certain period of time, the terminal may switch its active BWP to a default BWP.

[0081] FIG. 5 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 5 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted. In the embodiment of FIG. 5, it is assumed that there are three BWPs.

[0082] Referring to FIG. 5, for example, a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier band to the other, and a PRB may be a numbered resource block within each BWP. For example, point A may indicate a common reference point for a resource block grid.

[0083] For example, BWP is point A, offset from point A (N start BWP ) and bandwidth (N size BWP ) can be set by. For example, point A can be an outer reference point of the PRB of a carrier where subcarrier 0 of all numerologies (e.g., all numerologies supported by the network on that carrier) aligns. For example, the offset can be the PRB spacing between the lowest subcarrier in a given numerology and point A. For example, the bandwidth can be the number of PRBs in a given numerology.

[0084] FIG. 6 illustrates a communication structure that can be provided in a 6G system according to an embodiment of the present disclosure. The embodiment of FIG. 6 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0085] As core implementation technologies of the 6G system, technologies such as artificial intelligence (AI), THz (terahertz) communication, optical wireless technology, free-space optical transmission (FSO) backhaul networks, massive MIMO (multiple input multiple output) technology, blockchain, 3D networking, quantum communication, unmanned aerial vehicles, cell-free communication, wireless information and energy transfer (WIET), integration of sensing and communication, integration of access backhaul networks, holographic beamforming, big data analysis, and large intelligent surface (LIS) can be adopted.

[0086] - Artificial Intelligence: Incorporating AI into communications can streamline and improve real-time data transmission. AI can use numerous analytics to determine how complex target tasks should be performed. For example, AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handovers, network selection, and resource scheduling can be performed instantly using AI. AI can also play a key role in machine-to-machine (M2M), machine-to-human, and human-to-machine communications. AI can also facilitate rapid communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0087] - THz communication (terahertz communication): Data rates can be increased by increasing the bandwidth. This can be achieved by using sub-THz communication with wide bandwidths and applying advanced massive MIMO technology. THz waves, also known as sub-millimeter waves, typically refer to the frequency range between 0.1 THz and 10 THz, with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz to 300 GHz band (sub-THz band) is considered a key part of the THz spectrum for cellular communications. Adding the sub-THz band to the mmWave band will increase the capacity of 6G cellular communications. Among the defined THz bands, 300 GHz to 3 THz lies in the far infrared (IR) frequency band. While part of the optical band, the 300 GHz to 3 THz band lies at the boundary of the optical band, immediately following the RF band. Therefore, this 300 GHz to 3 THz band exhibits similarities to RF. Key characteristics of THz communications include (i) the widely available bandwidth to support very high data rates and (ii) the high path loss that occurs at high frequencies (requiring highly directional antennas). The narrow beamwidths generated by highly directional antennas reduce interference. The small wavelength of THz signals allows for a significantly larger number of antenna elements to be integrated into devices and base stations operating in this band. This enables the use of advanced adaptive array technologies to overcome range limitations.

[0088] - Large-scale MIMO technology

[0089] - Hologram beamforming (HBF)

[0090] - Optical wireless technology

[0091] - Free-space optical transmission backhaul network (FSO backhaul network)

[0092] - Quantum communication

[0093] - Cell-free communication

[0094] - Integration of wireless information and power transmission

[0095] - Integration of wireless communication and sensing

[0096] - Integrated access and backhaul network

[0097] - Big data analysis

[0098] - Reconfigurable intelligent surface

[0099] - metaverse

[0100] - Block chain

[0101] Advanced Air Mobility (AAM): AAM can be a broad concept encompassing urban air mobility (UAM), regional air mobility (RAM), and uncrewed aerial systems (UAS). For example, AAM can include UAM, RAM, UAS, and uncrewed aerial vehicles (UAVs).

[0102] - Autonomous driving (self-driving): V2X (vehicle to everything), a key element in building autonomous driving infrastructure, can be a technology that allows cars to communicate and share with various elements on the road for autonomous driving, such as vehicle to vehicle (V2V) wireless communication and vehicle to infrastructure (V2I) wireless communication.

[0103] Non-terrestrial network (NTN): NTN can refer to a network or network segment that utilizes radio frequency (RF) resources mounted on satellites (or UAS platforms). NTN services may be considered to secure wider coverage or provide wireless communication services in locations where the installation of wireless communication base stations is difficult.

[0104] - Integrated sensing and communication (ISAC): Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (range), etc. of an object, thereby obtaining information about the characteristics of the environment and / or objects within the environment.

[0105] - Reconfigurable intelligent surface (RIS): RIS can be used to manipulate and enhance signal propagation in wireless communication environments. For example, a RIS can be composed of many small antennas, or metasurfaces, arranged on a surface, each of which can actively control the phase, amplitude, polarization, etc. of the reflected signal. For example, a RIS can improve signal reception by controlling the path, phase, and / or intensity of the propagating signal. For example, in the case of a RIS, power consumption can be very low because power is consumed only for controlling the phase and amplitude of the small antennas. For example, because a RIS can be reconfigured to suit different environments, it can meet diverse communication requirements and operate effectively in dynamic network environments.

[0106] FIG. 7 illustrates an example of a communication scenario based on a 6G system, according to an embodiment of the present disclosure. The embodiment of FIG. 7 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0107] Referring to FIG. 7, NTN communication can be performed based on satellite networks, high-altitude platform stations (HAPS) as international mobile telecommunications (IMT) base stations (BS), and terminals capable of aerial communication (e.g., AAMs). For example, to improve coverage, etc., devices such as satellite networks, HIBS, and terminals capable of aerial communication (e.g., AAMs) can act as relays. For example, an AAM can communicate with a base station, a satellite network, etc., and / or an AAM can communicate directly with a terminal, another AAM, etc.

[0108] Figures 8a and 8b illustrate a non-terrestrial network scenario according to an embodiment of the present disclosure. The embodiments of Figures 8a and 8b may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0109] Figure 8a illustrates a non-terrestrial network scenario based on a transparent payload, and Figure 8b illustrates a non-terrestrial network scenario based on a regenerative payload. For example, a non-terrestrial network may typically include the following elements:

[0110] - One or more satellite gateways connecting non-terrestrial networks to public data networks.

[0111] - Feeder link or wireless link between the satellite gateway and the satellite (or UAS platform).

[0112] - Service link or wireless link between user equipment and satellite (or UAS platform)

[0113] - A satellite (or UAS platform) capable of implementing transparent or regenerative (including onboard processing) payloads. For example, a satellite (or UAS platform) may generate multiple beams over a given service area, typically bounded by a field of view. For example, the beam footprint may be typically elliptical in shape. For example, the field of view of the satellite (or UAS platform) may vary depending on the onboard antenna diagram and minimum elevation angle. For example, for transparent payloads, radio frequency filtering, frequency conversion, and amplification may be performed. Therefore, the repetitive waveform signal in the payload may remain unchanged. For example, for regenerative payloads, radio frequency filtering, frequency conversion, and amplification, as well as demodulation / decoding, switching and / or routing, and coding / modulation may be performed. This may effectively be equivalent to onboarding all base station functions onto the satellite (or UAS platform).

[0114] - Optionally, inter-satellite link (ISL)

[0115] - User equipment can be serviced by satellites (or UAS platforms) within the target service area.

[0116] FIG. 9 illustrates a procedure for downlink transmission and reception according to an embodiment of the present disclosure. The embodiment of FIG. 9 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0117] Referring to FIG. 9, for example, in step S910, the base station may schedule downlink transmissions such as frequency / time resources, transmission layers, downlink precoder, MCS, etc. For example, the base station may determine a beam for PDSCH transmission of the terminal through the operations described above.

[0118] For example, in step S920, the terminal can receive downlink control information (DCI) for downlink scheduling (e.g., including scheduling information of PDSCH) from the base station on the PDCCH.

[0119] For example, DCI format 1_0 or 1_1 may be used for downlink scheduling, and in particular, DCI format 1_1 may include the following information: Identifier for DCI formats, Bandwidth part indicator, Frequency domain resource assignment, Time domain resource assignment, PRB bundling size indicator, Rate matching indicator, ZP CSI-RS trigger, Antenna port(s), Transmission configuration indication (TCI), SRS request, DMRS (Demodulation Reference Signal) sequence initialization.

[0120] For example, depending on each state indicated in the Antenna port(s) field, a number of DMRS ports can be scheduled, and also single-user (SU) / multi-user (MU) transmission scheduling can be possible.

[0121] For example, the TCI field consists of 3 bits, and QCL for DMRS can be dynamically indicated by indicating up to 8 TCI states depending on the TCI field value.

[0122] For example, in step S930, the terminal can receive downlink data from the base station on the PDSCH.

[0123] For example, if a terminal detects a PDCCH including DCI format 1_0 or 1_1, it can decode the PDSCH according to instructions by the corresponding DCI.

[0124] For example, when a terminal receives a PDSCH scheduled by DCI format 1, the terminal may set a DMRS configuration type by a higher layer parameter 'dmrs-Type', and the DMRS type may be used to receive the PDSCH. For example, the terminal may set a maximum number of DMRA symbols to be front-loaded for the PDSCH by a higher layer parameter 'maxLength'.

[0125] For example, for DMRS configuration type 1, if a terminal is scheduled with a single codeword and is assigned an antenna port mapped with an index of {2, 9, 10, 11, or 30}, or if a terminal is scheduled with two codewords, the terminal can assume that all remaining orthogonal antenna ports are not associated with a PDSCH transmission to another terminal.

[0126] For example, for DMRS configuration type 2, if a terminal is scheduled with a single codeword and is assigned an antenna port mapped with an index of {2, 10, or 23}, or if a terminal is scheduled with two codewords, the terminal can assume that all remaining orthogonal antenna ports are not associated with a PDSCH transmission to another terminal.

[0127] For example, when a terminal receives a PDSCH, a precoding granularity P' can be assumed to be a consecutive resource block in the frequency domain. For example, P' can correspond to one of the values ​​{2, 4, wideband}.

[0128] For example, if P' is determined to be wideband, the terminal does not expect to be scheduled with non-contiguous PRBs, and the terminal can assume that the same precoding is applied to the allocated resources.

[0129] For example, if P' is determined to be one of {2, 4}, a precoding resource block group (PRG) can be divided into P' consecutive PRBs. For example, the actual number of consecutive PRBs within each PRG can be one or more. For example, a UE can assume that the same precoding is applied to consecutive downlink PRBs within a PRG.

[0130] For example, in order for a terminal to determine the modulation order, target code rate, and transport block size within a PDSCH, the terminal may first read a 5-bit MCD field within the DCI to determine the modulation order and target code rate. Then, the terminal may read a redundancy version field within the DCI to determine the redundancy version. Then, the terminal may determine the transport block size using the number of layers and the total number of allocated PRBs before rate matching.

[0131] FIG. 10 illustrates a procedure for uplink transmission and reception according to an embodiment of the present disclosure. The embodiment of FIG. 10 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0132] Referring to FIG. 10, for example, in step S1010, the base station may schedule uplink transmissions such as frequency / time resources, transmission layers, uplink precoder, MCS, etc. For example, the base station may determine a beam for PUSCH transmission of the terminal through the operations described above.

[0133] For example, in step S1020, the terminal may receive DCI for uplink scheduling (e.g., including scheduling information of PUSCH) from the base station on the PDCCH.

[0134] For example, DCI format 0_0 or 0_1 may be used for uplink scheduling, and in particular, DCI format 0_1 ​​may include the following information: DCI format identifier, UL / SUL (Supplementary uplink) indicator, UL / SUL indicator, bandwidth part indicator, frequency domain resource assignment, time domain resource assignment, frequency hopping flag, modulation and coding scheme (MCS), SRS resource indicator (SRI), precoding information and number of layers, antenna port(s), SRS request, DMRS sequence initialization, UL-SCH (Uplink Shared Channel) indicator.

[0135] For example, SRS resources configured within a set of SRS resources associated with the upper layer parameter 'usage' can be indicated by the SRS resource indicator field. For example, 'spatialRelationInfo' can be configured for each SRS resource, and its value can be one of {CRI, SSB, SRI}.

[0136] For example, in step S1030, the terminal may transmit uplink data to the base station on PUSCH.

[0137] For example, if a terminal detects a PDCCH including DCI format 0_0 or 0_1, it can transmit the corresponding PUSCH according to the instructions of the corresponding DCI.

[0138] For example, two transmission schemes (e.g., codebook-based transmission for PUSCH transmission and non-codebook-based transmission for PUSCH transmission) may be supported:

[0139] i) For example, when the upper layer parameter 'txConfig' is set to 'codebook', the terminal may be configured for codebook-based transmission. For example, when the upper layer parameter 'txConfig' is set to 'nonCodebook', the terminal may be configured for non-codebook-based transmission. For example, if the upper layer parameter 'txConfig' is not set, the terminal may not expect to be scheduled by DCI format 0_1. For example, when PUSCH is scheduled by DCI format 0_0, PUSCH transmission may be based on a single antenna port.

[0140] For example, in case of codebook-based transmission, PUSCH can be scheduled in DCI format 0_0, DCI format 0_1, or semi-statically. For example, if this PUSCH is scheduled by DCI format 0_1, the UE can determine the PUSCH transmission precoder based on the SRI, the transmit precoding matrix indicator (TPMI), and the transmission rank from the DCI, as given by the SRS resource indicator field and the precoding information and number of layers field. For example, the TPMI is used to indicate the precoder to be applied across antenna ports, and may correspond to the SRS resource selected by the SRI when multiple SRS resources are configured. For example, if a single SRS resource is configured, the TPMI is used to indicate the precoder to be applied across antenna ports, and may correspond to the single SRS resource. For example, a transmit precoder may be selected from an uplink codebook having the same number of antenna ports as the upper layer parameter 'nrofSRS-Ports'. For example, when a terminal sets an upper layer with 'codebook' as the parameter 'txConfig', the terminal may be configured with at least one SRS resource. For example, an SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, wherein the SRS resource may precede the PDCCH carrying the SRI (e.g., slot n).

[0141] ii) For example, in case of non-codebook based transmission, PUSCH can be scheduled in DCI format 0_0, DCI format 0_1, or semi-statically. For example, when multiple SRS resources are configured, the UE can determine the PUSCH precoder and transmission rank based on the wideband SRI, where the SRI can be given by the SRS resource indicator in the DCI or by the higher layer parameter 'srs-ResourceIndicator'. For example, the UE uses one or multiple SRS resources for SRS transmission, where the number of SRS resources can be configured for simultaneous transmission within the same RB based on the UE capability. For example, only one SRS port can be configured for each SRS resource. For example, only one SRS resource can be configured with the higher layer parameter 'usage' set to 'nonCodebook'. For example, the maximum number of SRS resources that can be configured for non-codebook based uplink transmission may be 4. For example, the SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, where the SRS transmission may precede the PDCCH carrying the SRI (e.g., slot n).

[0142] FIG. 11 illustrates an example of an NTN according to an embodiment of the present disclosure. The embodiment of FIG. 11 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0143] Referring to Fig. 11, examples according to NTN platform types can be shown. For example, examples according to NTN platform types can be HAPS (High-Altitude Platform Station), LEO (Low Earth orbit), MEO (Medium Earth orbit), or GEO (Geo-stationary Earth orbit).

[0144] For example, parameters related to a High-Altitude Platform Station (HAPS) may be as follows: For example, the altitude of the High-Altitude Platform Station (HAPS) may be 20 km. For example, the beam footprint size of the High-Altitude Platform Station (HAPS) may be 5-200 km.

[0145] For example, parameters related to LEO (Low Earth orbit) can be as follows. For example, the altitude of LEO (Low Earth orbit) can be 300-1500 km. For example, the beam footprint size of LEO (Low Earth orbit) can be 100-1000 km. For example, the satellite speed in LEO (Low Earth orbit) can be 7.56 km / sec (for LEO-600). For example, the maximum propagation delay in LEO (Low Earth orbit) can be 25.77 msec (for LEO-600).

[0146] For example, parameters related to MEO (Medium Earth orbit) can be as follows. For example, the altitude of MEO (Medium Earth orbit) can be 7000-25000 km. For example, the beam footprint size of MEO (Medium Earth orbit) can be 100-1500 km. For example, the maximum propagation delay of MEO (Medium Earth orbit) can be 95.19 msec (for MEO-10000).

[0147] For example, the parameters related to Geo-stationary Earth orbit (GEO) can be as follows. For example, the altitude of Geo-stationary Earth orbit (GEO) can be 35786 km. For example, the beam footprint size of Geo-stationary Earth orbit (GEO) can be 200-3500 km. For example, the satellite speed of Geo-stationary Earth orbit (GEO) can be 3.1 km / sec (negligible). For example, the maximum propagation delay of Geo-stationary Earth orbit (GEO) can be 541.46 msec.

[0148] For example, to effectively operate NTN with very long RTT, scheduling offsets K_offset and K_mac can be introduced.

[0149] FIG. 12 illustrates examples of K_offset and K_mac according to one embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0150] Referring to FIG. 12, examples of K_offset and K_mac can be shown. For example, a service link RTT can be an RTT between a terminal and a satellite. For example, a feeder link RTT can be an RTT between a satellite and a base station. For example, a common TA can be a TA between a satellite and a RP. For example, K_offset can be an offset value indicating the RTT of an uplink time synchronization reference point (RP). For example, K_offset can mean the sum of the service link RTT and the common TA (if indicated). For example, K_mac can be an offset value indicating the RTT between an RP and a gNB. For example, the feeder link RTT could mean the sum of the common TA (if indicated) and K_mac.

[0151] FIG. 13 illustrates examples of UE-specific TAs and common TAs according to one embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0152] Referring to FIG. 13, for example, in Rel-17 NTN, a UE can calculate a TA on its own based on its GNSS capability and base station indication information (e.g., ephemeris information), which can be referred to as a UE-specific TA. For example, a TA calculated based on common TA parameters indicated by a base station can be referred to as a common TA, and the final TA based on this can be based on FIG. 14 and the description related to FIG. 14.

[0153] FIG. 14 illustrates an example of an uplink-downlink timing relationship according to an embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0154] Referring to Figure 14, the uplink frame number i for transmission from the UE is the number of frames before the start of the corresponding downlink frame at the UE. You can start here

[0155] - and can be given in clause 4.2 of TS 38.213, This may be excluded for msgA transmission on PUSCH that should be used;

[0156] - If indicated, it can be derived from the upper-layer parameters TACommon, TACommonDrift, and TACommonDriftVariation, otherwise It could be;

[0157] - If indicated, the UE position and serving-satellite-orbit-related upper-layer parameters can be computed by the UE, otherwise It could be.

[0158] For example, there may be a TA misalignment.

[0159] For example, in NR NTN, TA mismatch may occur if the gNB does not receive TA reports, if the existing TA reports are outdated, or if the TA reporting granularity is not sufficiently granular. For example, if the UE does not perform TA reporting at all, the above scenario (e.g., no TA reporting) may not be considered a feasible scenario, since the gNB cannot set some key scheduling variables (e.g., K_(cell,offset), K_(UE,offset)). Therefore, assuming that the UE performs TA reporting, the magnitude of the TA mismatch due to TA report aging and / or TA report granularity may need to be addressed. For example, if the UE performs TA reporting in NR NTN, the TA mismatch may occur primarily due to outdated TA reports and / or coarse TA report granularity. For example, for HD-FDD (e)RedCap UE support, the issue of quantitative level TA misalignment between gNB and UE may need to be addressed.

[0160] Meanwhile, differences due to old TA reports may occur when the UE location changes, and may occur proportionally to RTT differences that depend on the UE location within the cell (e.g., difference between minimum TA and maximum TA).

[0161] FIG. 15 illustrates an example of TA mismatch within a beam / cell, according to an embodiment of the present disclosure. The embodiment of FIG. 15 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0162] Referring to FIG. 15, for example, assuming LEO 600 km, beam size 50 km, and target elevation angle 30 degrees, the difference between the shortest RTT (minimum TA) and the longest RTT (maximum TA) can be within about 300 us, which can correspond to about 4 to 5 OFDM symbols using 15 kHz SCS.

[0163] For example, assuming LEO 600 km, beam size 50 km, and target elevation angle 30 degrees, the difference between the shortest RTT (min TA) and the longest RTT (max TA) is within about 300 μs, which can correspond to about 4 to 5 OFDM symbols with 15 kHz SCS. For example, considering that the TA reporting granularity of NTN is 1 ms (e.g., 14 OFDM symbols using 15 kHz SCS), in the LEO example, the main cause of TA mismatch may be the TA reporting granularity, not the stale TA reports. For example, for LEO 600 km, beam size 50 km, and target elevation angle 30 degrees, the difference between the min TA and the max TA may be less than the TA reporting granularity (e.g., 1 ms). For example, for HD-FDD (e)RedCap UE support, improved TA reporting mechanisms, especially TA reporting granularity issues, may need to be addressed.

[0164] For example, there may be a DL / UL conflict under TA misalignment.

[0165] When comparing the timing advance of NTN and TN due to satellite movement, the timing advance of the service link between the satellite and the UE can be estimated by the UE itself. For example, the gNB can obtain the TA value through TA reporting. However, due to the current 1 ms granularity of TA reporting, the gNB cannot obtain the exact TA used by the UE, and it cannot determine when and which transmissions on the UE side will collide. For example, since the rule for when DL reception collides with UL transmission is to avoid collisions through gNB scheduling, the gNB in ​​the NTN may have difficulty determining whether the UE is in an uplink or downlink slot.

[0166] Recently, research on non-terrestrial networks (NTNs), which utilize satellites, drones, and other technologies as network nodes, has been actively conducted in the mobile communications field. For example, satellites in NTNs can be broadly categorized into geosynchronous orbit (GSO) satellites and non-GSO (NGSO) satellites. Furthermore, satellites can be categorized based on their altitude into low Earth orbit (LEO), medium Earth orbit (MEO), and high Earth orbit (HEO). In the mobile communications field, LEO-based NTN support methods, which offer relatively low costs and high data rates, are primarily being studied. However, LEO satellites are NGSO satellites and, due to their close proximity to the Earth's surface, require extremely high speeds to maintain their orbit. Therefore, to provide services to terrestrial terminals via LEO satellites, the Doppler shift caused by their high relative velocity and / or the significant time delays associated with their high altitude must be overcome.

[0167] Meanwhile, discussions are underway on supporting non-terrestrial networks using a time division duplex (TDD) scheme. Here, TDD has the advantage of being able to use frequencies more efficiently than frequency division duplex (FDD) in that it requires less frequency bandwidth and can adjust the ratio between DL and UL depending on traffic conditions. However, in non-terrestrial networks, there may be difficulties in supporting the TDD scheme due to large time delays caused by high altitudes. For example, in the conventional TDD scheme, a DL-to-UL guard time is included in the DL / UL configuration that takes into account the round trip time (RTT). For example, the DL-to-UL guard time may be included in the DL / UL configuration in the form of a flexible resource and / or a guard time. Here, since the time delay (e.g., RTT) and the corresponding DL-to-UL guard time may be different between beams within the same satellite depending on the service angle and / or elevation angle of the satellite beam, when the conventional TDD method is applied, cases may arise where DL / UL configurations conflict with each other due to different flexible resources and / or guard times between satellite beams within the same satellite. Here, the next-generation mobile communication system should be able to support the TDD method in which DL / UL configurations are aligned between satellite beams even if the transmission delays, etc. are different between satellite beams within the same satellite. In view of the above, the present disclosure proposes a communication method and device supporting a time division duplexing method in a non-terrestrial network.

[0168] In TDD operation of non-terrestrial networks (NTN), the RTT between satellite and terminal varies greatly from several ms to tens of ms, and continuously changes between beams and / or time intervals. The existing NR TDD standard was designed based on the assumption of fixed DL / UL patterns and static guard times. If it is applied as is to the above delay fluctuation environment, it will cause the following problems: ① cross link interference (CLI) and link collision caused by overlapping DL and / or UL time resources, ② frequent pattern re-signaling to resolve CLI, ③ reduced spectral efficiency due to excessively widened guard times and / or flexible resources for safety, and ④ increased delay. Therefore, a technology is required that can prevent DL / UL collisions and maintain resource efficiency without separate frequent reconfiguration by directly reflecting the uplink timing advance that changes in real time in the communication pattern design.

[0169] Hereinafter, the proposed method(s) of the present disclosure are described as an example of a non-terrestrial network, but the proposed method(s) of the present disclosure can be extended and applied to a terrestrial network as well.

[0170] Hereinafter, the proposed method(s) of the present disclosure are described as an example of the TDD (time division duplex) method, but the proposed method(s) of the present disclosure can also be extended and applied to the HD-FDD (half-duplex FDD) method.

[0171] For example, the present disclosure may be configured to integrate between a terrestrial network (TN) and a non-terrestrial network (NTN), and in such a situation, the distinction between TN and NTN may not be explicit. For example, according to the present disclosure, when a terminal is distinguished as being a TN or NTN or classified into categories corresponding thereto, optimized operations appropriate for each can be performed.

[0172] For example, the present disclosure may be applied differently depending on the payload type of the satellite (e.g., regenerative payload or transparent payload).

[0173] For example, the present disclosure may be applied differently depending on the type of non-terrestrial network node (e.g., geostationary earth orbit (GEO), non-geostationary earth orbit (NGEO), low earth orbit (LEO), medium earth orbit (MEO), high altitude satellite platform (HASP), drone) or altitude or fixed beam footprint or cell-moving beam footprint, etc.

[0174] FIG. 16 illustrates a procedure for performing communication based on uplink timing advance and uplink / downlink configuration according to one embodiment of the present disclosure. The embodiment of FIG. 16 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0175] For example, in step S1610, the first device may obtain an uplink timing advance. For example, in step S1620, the first device may perform communication with the second device based on uplink and downlink settings associated with the uplink timing advance. For example, the first device may be a terminal. For example, the second device may be a base station, a network node, or a satellite. For example, the first device and / or the second device may be associated with a non-terrestrial network.

[0176] FIG. 17 illustrates an example of a DL / UL configuration based on UL TA information and / or DL / UL collision information, according to one embodiment of the present disclosure. The embodiment of FIG. 17 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0177] [Proposal #01] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the base station (or network node) and / or the terminal can determine and / or apply the size and / or location of a flexible resource and / or a guard time (within the DL / UL configuration) based on the information(s).

[0178] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the DL / UL collision information may mean DL resource(s) and / or UL resource(s) that collide with each other, assuming (periodic) application of the DL / UL configuration information and a specific UL TA. Here, for example, the flexible resources and / or guard time may be defined to include DL resource(s) and / or UL resource(s) that collide with each other when assuming a (specific) UL TA (timing advance).

[0179] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0180] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0181] Here, in order to align the DL / UL configuration between satellite beams having different time delays (or transmission delays), the influence of increased and / or decreased flexible resources and / or guard times corresponding to the time delays (or transmission delays) of each beam can be offset by decreasing and / or increasing the DL resources and / or UL resources. This allows the length of the time period (or time interval) to which the DL / UL configuration is applied to be applied to be equally applied between satellite beams. Here, the DL / UL configuration between the satellite beams must be set so that the DL and UL do not cause interference between each other.

[0182] Here, given the time delay and very short service times of non-terrestrial networks, adjusting the DL / UL configuration information per satellite beam through signaling from the base station (or network node) whenever the time delay (or transmission delay) changes may be inefficient. For example, LEO satellites move very quickly, at approximately 7.5 km / s. Therefore, even if the base station (or network node) updates the DL / UL configuration settings, the settings may only be valid for a very short period of time. Therefore, there is a risk that a very high signaling load and / or frequent configuration mismatches may occur, which may degrade the overall communication service quality.

[0183] Accordingly, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the base station (or network node) and / or the terminal can determine and / or apply the size and / or position of a flexible resource and / or a guard time (within the DL / UL configuration) based on the information(s). Here, for example, the flexible resource and / or the guard time can be defined to include DL resource(s) and / or UL resource(s) and / or a time margin, etc. that collide with each other when the base station (or network node) and / or the terminal assumes (a specific) UL TA (timing advance). For example, in FIG. 17, UE1 and UE2 may be UEs served by different satellite beams having different elevation angles from the same satellite, and may have different TA values ​​(e.g., TA1 and TA2). Here, for example, the satellite may transmit the same DL / UL configuration for reference to the terminal(s), and may adjust the DL / UL configuration for each terminal by determining / applying flexible resources and / or guard times to include conflicting DL / UL resource(s) according to the UL TA values ​​for each terminal.

[0184] According to the proposed method of the present disclosure, it is possible to support the application of possible aligned DL / UL configurations between different satellite beams within the same satellite, and to support the setting of flexible resources and / or guard time (within the DL / UL configuration) based on terminal-specific TA and / or DL / UL collision information, thereby preventing cross link interference (CLI) problems. Here, for example, the flexible resources and / or guard time may be defined to include DL / UL resource(s) that collide when assuming the TA.

[0185] The above [Proposal #01] can be applied in combination with other proposed methods(s) to the extent that the proposed actions do not conflict.

[0186] FIG. 18 illustrates an example of a relative DL / UL configuration based on a difference in UL TA values, according to an embodiment of the present disclosure. The embodiment of FIG. 18 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0187] [Proposal #02] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the base station (or network node) and / or the terminal can utilize a value obtained by dividing a UL TA value by a time period to which the DL / UL configuration information is applied as the UL TA information.

[0188] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the DL / UL collision information may mean DL resource(s) and / or UL resource(s) that collide with each other, assuming (periodic) application of the DL / UL configuration information and a specific UL TA. Here, for example, the flexible resources and / or guard time may be defined to include DL resource(s) and / or UL resource(s) that collide with each other when assuming a (specific) UL TA (timing advance).

[0189] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0190] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0191] Here, in order to align the DL / UL configuration between satellite beams having different time delays (or transmission delays), the influence of increased and / or decreased flexible resources and / or guard times corresponding to the time delays (or transmission delays) of each beam can be offset by decreasing and / or increasing the DL resources and / or UL resources. This allows the length of the time period (or time interval) to which the DL / UL configuration is applied to be applied to be equally applied between satellite beams. Here, the DL / UL configuration between the satellite beams must be set so that the DL and UL do not cause interference between each other.

[0192] Here, given the time delay and very short service times of non-terrestrial networks, adjusting the DL / UL configuration information per satellite beam through signaling from the base station (or network node) whenever the time delay (or transmission delay) changes may be inefficient. For example, LEO satellites move very quickly, at approximately 7.5 km / s. Therefore, even if the base station (or network node) updates the DL / UL configuration settings, the settings may only be valid for a very short period of time. Therefore, there is a risk that a very high signaling load and / or frequent configuration mismatches may occur, which may degrade the overall communication service quality.

[0193] Here, for example, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the base station (or network node) and / or the terminal can determine and / or apply the size and / or location of a flexible resource and / or a guard time (within the DL / UL configuration) based on the information(s).

[0194] Here, for example, if two different UL TA values ​​differ by a multiple of the application period of the DL / UL configuration, the relative positions of the DL / UL resource(s) that collide with each other (within the DL / UL configuration) may be the same. For example, as shown in FIG. 18, although TA1 and TA2 differ by 6 slots, which is one period of the DL / UL configuration, the relative positions of the DL / UL resources that collide with each other (within one period) may be the same due to the periodicity of the DL / UL configuration. Therefore, the present disclosure may utilize a value obtained by dividing the UL TA value by the time period to which the DL / UL configuration information is applied as the UL TA information.

[0195] According to the proposed method of the present disclosure, it is possible to support the application of possible aligned DL / UL configurations between different satellite beams within the same satellite, and to support the setting of flexible resources and / or guard time (within the DL / UL configuration) based on terminal-specific TA and / or DL / UL collision information, thereby preventing cross link interference (CLI) problems. Here, for example, the flexible resources and / or guard time may be defined to include DL / UL resource(s) that collide when assuming the TA.

[0196] The above [Proposal #02] can be applied in combination with other proposed methods(s) to the extent that the proposed actions do not conflict.

[0197] FIG. 19 illustrates an example of DL / UL configuration adjustment according to an application cycle, according to one embodiment of the present disclosure. The embodiment of FIG. 19 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0198] [Proposal #03] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the base station (or network node) and / or the terminal can adjust the DL / UL configuration in one or more of the following ways for each time period during which the DL / UL configuration is applied.

[0199] (1) Invalidate (conflicting) DL resource(s) and utilize UL resources.

[0200] (2) Invalidate (conflicting) UL resource(s) and utilize DL resources.

[0201] (3) Utilize (conflicting) DL(s) and / or UL resource(s) as flexible resources and / or guard time.

[0202] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the DL / UL collision information may mean DL resource(s) and / or UL resource(s) that collide with each other, assuming (periodic) application of the DL / UL configuration information and a specific UL TA. Here, for example, the flexible resources and / or guard times may be defined to include DL resource(s) and / or UL resource(s) that collide with each other when assuming a (specific) UL TA (timing advance). Here, for example, the explicit DL resources and / or UL resources in the DL / UL configuration may be utilized as resources for semi-static DL and / or UL transmission configuration.

[0203] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0204] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0205] Here, in order to align the DL / UL configuration between satellite beams having different time delays (or transmission delays), the influence of increased and / or decreased flexible resources and / or guard times corresponding to the time delays (or transmission delays) of each beam can be offset by decreasing and / or increasing the DL resources and / or UL resources. This allows the length of the time period (or time interval) to which the DL / UL configuration is applied to be applied to be equally applied between satellite beams. Here, the DL / UL configuration between the satellite beams must be set so that the DL and UL do not cause interference between each other.

[0206] Here, given the time delay and very short service times of non-terrestrial networks, adjusting the DL / UL configuration information per satellite beam through signaling from the base station (or network node) whenever the time delay (or transmission delay) changes may be inefficient. For example, LEO satellites move very quickly, at approximately 7.5 km / s. Therefore, even if the base station (or network node) updates the DL / UL configuration settings, the settings may only be valid for a very short period of time. Therefore, there is a risk that a very high signaling load and / or frequent configuration mismatches may occur, which may degrade the overall communication service quality.

[0207] Here, for example, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the size and / or location of flexible resources and / or guard time (within the DL / UL configuration) can be determined and / or applied based on the information(s).

[0208] Here, when the DL / UL configuration (e.g., the size and / or location of flexible resources and / or guard times within the DL / UL configuration) is adjusted based on the UL TA information and / or DL / UL collision information, there may be cases where explicit DL resources and / or UL resources do not exist within the DL / UL configuration after the adjustment. For example, in FIG. 17, when the DL / UL configuration based on the UL TA information and / or DL / UL collision information is adjusted from the perspective of UE2, all UL resources within the DL / UL configuration may conflict with DL resources and be converted to flexible resources. For example, only flexible resources may exist within the DL / UL configuration, and no explicit DL resources and / or UL resources may exist. In the above case, since there are no DL resources and / or UL resources that guarantee the directionality of the link within the DL / UL configuration, it may be difficult to set up semi-static DL and / or UL transmission within the DL / UL configuration. Therefore, in the present disclosure, when a base station (or a network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, and when the base station (or network node) and / or the terminal can adjust the DL / UL configuration based on UL TA (timing advance) information and / or DL / UL collision information, the base station (or network node) and / or the terminal can adjust the DL / UL configuration in one or more of the following ways for each time period to which the DL / UL configuration is applied.

[0209] (1) Invalidate (conflicting) DL resource(s) and utilize UL resources.

[0210] (2) Invalidate (conflicting) UL resource(s) and utilize DL resources.

[0211] (3) Utilize (conflicting) DL(s) and / or UL resource(s) as flexible resources and / or guard time.

[0212] For example, for three time periods in which the DL / UL configuration is repeatedly applied, as shown in FIG. 19, in the first period, DL resources may be prioritized among DL / UL conflicting resources, in the second period, DL / UL conflicting resources may be set as flexible resources, and in the third period, UL resources may be prioritized among DL / UL conflicting resources. Through this, explicit DL resources and / or UL resources may be secured.

[0213] According to the proposed method of the present disclosure, it is possible to support the application of possible aligned DL / UL configurations between different satellite beams within the same satellite, and to support the setting of flexible resources and / or guard time (within the DL / UL configuration) based on terminal-specific TA and / or DL / UL collision information, thereby preventing the CLI (cross link interference) problem. Here, for example, the flexible resources and / or guard time can be defined to include DL / UL resource(s) that collide when the TA is assumed. Here, for example, when the DL / UL configuration is repeated periodically, by giving priority to resources in a specific direction among the colliding DL / UL resource(s) for some cycles, explicit DL resources and / or UL resources can be secured within the DL / UL configuration. As a result, it is possible to support semi-static DL and / or UL transmission, etc., utilizing explicit DL and / or UL resources within the DL / UL configuration.

[0214] The above [Proposal #03] can be applied in combination with other proposed methods(s) to the extent that the proposed actions do not conflict.

[0215] FIG. 20 illustrates an example of a DL / UL configuration based on a time-axis dual pattern application, according to one embodiment of the present disclosure. The embodiment of FIG. 20 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0216] [Proposal #04] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the DL / UL configuration can be (pre-) set and / or defined within a first time interval, and a (time axis) pattern in which the DL / UL configuration is applied and / or activated can be set and / or defined within a second time interval.

[0217] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the second time interval may be set to a multiple of the first time interval, and the (time axis) pattern may be defined in units of the first time interval. Here, for example, the DL / UL configuration pattern may be repeatedly applied for each second time interval. Here, for example, the base station (or network node) and / or terminal may consider a period in which the DL / UL configuration is not applied and / or activated within the first time period as a flexible resource and / or guard time. Here, for example, the DL / UL configuration may be (pre-)configured and / or defined such that the UL resource(s) precede the DL resource(s) on the time axis within the first time period.

[0218] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0219] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0220] Accordingly, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the DL / UL configuration may be (pre-)configured and / or defined within a first time interval, and a (time axis) pattern in which the DL / UL configuration is applied and / or activated may be configured and / or defined within a second time interval. For example, when a DL / UL configuration is defined within a first time interval, and the DL / UL configuration can be repeated in a cycle as long as the first time interval, the DL / UL configuration may be deactivated during some of the cycle(s) so as to be utilized as a flexible resource and / or a guard time. For example, when attempting to secure a flexible resource and / or a guard time, some cycle(s) of the cycles in which the DL / UL configuration is repeated may be deactivated. Alternatively, for example, the DL / UL configuration may be defined within a first time interval, and a time axis offset and / or time axis period during which the first time interval is activated may be separately set.

[0221] According to the proposed method of the present disclosure, by providing different DL-to-UL guard times, etc. required for each satellite beam in units of time cycles to which DL / UL configurations are applied, there is an effect of preventing CLI (cross link interference) problems between DL / UL due to the boundary of DL / UL configurations between different satellite beams being distorted.

[0222] The above [Proposal #04] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0223] [Proposal #05] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) may provide the DL / UL configuration information to the terminal in association with service target area and / or target location information.

[0224] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the base station (or network node) may (pre-)define and / or set valid DL resource and / or UL resource configuration information to the terminal depending on the location.

[0225] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0226] Here, for example, let's assume a situation where different terminals in a (specific) service area receive services from different satellites. In this case, the DL / UL configurations applied to each satellite-terminal pair may be different, which may cause cross-link interference (CLI) between the terminals. For example, if the two terminals are terminal 1 and terminal 2, while the first terminal receives a DL, the second terminal may transmit a UL, which may significantly interfere with the DL reception of the first terminal. Therefore, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the DL / UL configuration information may be provided in conjunction with information on a service target area and / or target location.

[0227] According to the proposed method of the present disclosure, TDD and / or DL / UL configuration information can be provided in conjunction with service area and / or location information (on the ground), thereby enabling any terminal(s) in the corresponding area and / or location to transmit and receive according to the same DL / UL configuration. Here, since terminals in the corresponding service area and / or location can apply a consistent DL / UL configuration, the CLI problem can be resolved.

[0228] The above [Proposal #05] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0229] [Proposal #06] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, when the terminal performs UL transmission based on the DL / UL configuration information, the terminal may transmit including one or more of the following information (e.g., CLI (cross link interference) information).

[0230] (1) Satellite identification information (UL transmission target)

[0231] (2) (UL transmission target) Satellite ephemeris information

[0232] (3) (UL transmission target) GW (gateway) identification information

[0233] (4) (UL transmission target) (terrestrial) base station (or network node) identification information

[0234] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL, or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the terminal may transmit the information in a detectable form via a reference signal or in a form receivable by any terminal. Here, for example, the terminal may perform detection on the CLI information upon DL reception, and report to its service base station (or network node) if the interference intensity is above a certain level. Here, for example, whether or not the CLI information is included can be (pre-) set and / or defined by the base station (or network node) to the terminal.

[0235] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0236] Here, for example, let's assume a situation where different terminals in a (specific) service area receive services from different satellites. In this case, the DL / UL configurations applied to each satellite-terminal pair may be different, which may cause cross link interference (CLI) between the terminals. For example, if the two terminals are terminal 1 and terminal 2, respectively, while the first terminal receives DL, the second terminal may transmit UL, which may have a significant interference effect on the DL reception of the first terminal. Therefore, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the terminal may transmit one or more of the following information (e.g., CLI (cross link interference) information) when performing UL transmission based on the DL / UL configuration information.

[0237] (1) Satellite identification information (UL transmission target)

[0238] (2) (UL transmission target) Satellite ephemeris information

[0239] (3) (UL transmission target) GW (gateway) identification information

[0240] (4) (UL transmission target) (terrestrial) base station (or network node) identification information

[0241] According to the proposed method of the present disclosure, a terminal experiencing UL-to-DL interference from an adjacent terminal communicating with a non-terrestrial network can detect CLI information and / or satellite identification information within the UL transmission and report this to the serving satellite and / or network to request interference control. This has the advantage of making it easier to detect the cause of interference when CLI (cross link interference) occurs.

[0242] The above [Proposal #06] can be applied in combination with other proposed methods(s) to the extent that the proposed actions do not conflict.

[0243] [Proposal #07] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, a first DL / UL configuration that is set semi-statically and a second DL / UL configuration that is dynamically activated by a dynamic trigger may be supported.

[0244] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the dynamic trigger may include transmission resource activation and / or transmission resource scheduling and / or dynamic control information transmission (within the second DL / UL configuration). Here, for example, the dynamic trigger may be transmitted to the terminal through the first DL / UL configuration. Here, for example, the second DL / UL configuration may be activated within flexible resources and / or guard time within the first DL / UL configuration.

[0245] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0246] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0247] Here, as one way to match the DL / UL configuration between the satellite beams, a DL / UL configuration in which flexible resources and / or guard times are set based on the (maximum) transmission delay of the satellite beams can be commonly utilized. Here, the flexible resources and / or guard time interval within the DL / UL configuration may include a DL-to-UL guard time according to the (maximum) transmission delay, and thus may occupy a relatively long time interval. Here, the DL and / or UL transmission pattern within the flexible resources and / or guard time interval within the DL / UL configuration may depend on the transmission settings and / or scheduling of the base station (or network node), but as the time interval becomes longer, the implementation complexity of the base station (or network node) may increase, which may cause a problem.

[0248] Accordingly, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, a first DL / UL configuration that is set semi-statically and a second DL / UL configuration that is dynamically activated by a dynamic trigger or the like can be supported. Here, for example, the second DL / UL configuration can be activated within a flexible resource and / or guard time within the first DL / UL configuration. Here, for example, the dynamic trigger signal can be provided to the terminal via the first DL / UL configuration, and the dynamic trigger signal can include transmission resource activation and / or transmission resource scheduling and / or dynamic control information transfer (within the second DL / UL configuration). For example, when a DL / UL configuration in which flexible resources and / or guard times are set based on a (maximum) transmission delay of a satellite beam is referred to as a first DL / UL configuration, a second DL / UL configuration that is active during an unset resource and / or flexible resource and / or guard time period in the first DL / UL configuration can be set / defined. Here, for example, the second DL / UL configuration can be a DL / UL configuration for the purpose of supporting low-latency transmission and / or random access (e.g., Random Access Channel, etc.). For example, the second DL / UL configuration can be activated when there is at least one DL and / or UL transmission according to the second DL / UL configuration.

[0249] According to the proposed method of the present disclosure, by commonly applying a DL / UL configuration that assumes a (maximum) time delay (or transmission delay) of a satellite beam, it is possible to support the application of possible aligned DL / UL configurations between different satellite beams (within the same satellite). In addition, by providing a separate DL / UL configuration that can be activated in a flexible resource and / or guard time period that is inefficiently set within the DL / UL configuration according to the (maximum) time delay assumption, it is also possible to achieve efficiency in resource utilization for each satellite beam.

[0250] The above [Proposal #07] can be applied in combination with other proposed methods(s) as long as the proposed actions do not conflict.

[0251] [Proposal #08] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the DL / UL configuration information may include a first DL / UL pattern and a second DL / UL pattern applicable to a midpoint within the first DL / UL pattern and / or specific resource(s).

[0252] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the first DL / UL pattern may have a (relatively) long (time axis) interval between DL resources and UL resources, and the second DL / UL pattern may have a (relatively) short (time axis) interval between DL resources and UL resources. Here, for example, the second DL / UL pattern may be applied to resources that are not configured as DL resources and / or UL resources and / or flexible resources (e.g., unconfigured resources) within the first DL / UL pattern. Here, for example, the second DL / UL pattern may be applied periodically within the first DL / UL pattern.

[0253] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0254] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0255] Here, as one way to match the DL / UL configuration between the satellite beams, a DL / UL configuration in which flexible resources and / or guard times are set based on the (maximum) transmission delay of the satellite beams can be commonly utilized. Here, the flexible resources and / or guard time interval within the DL / UL configuration may include a DL-to-UL guard time according to the (maximum) transmission delay, and thus may occupy a relatively long time interval. Here, the DL and / or UL transmission pattern within the flexible resources and / or guard time interval within the DL / UL configuration may depend on the transmission settings and / or scheduling of the base station (or network node), but as the time interval becomes longer, the implementation complexity of the base station (or network node) may increase, which may cause a problem.

[0256] Accordingly, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the DL / UL configuration information may include a first DL / UL pattern and a second DL / UL pattern applicable to a midpoint and / or specific resource(s) within the first DL / UL pattern. Here, for example, the first DL / UL pattern may have a (relatively) long (time axis) interval between DL resources and UL resources, and the second DL / UL pattern may have a (relatively) short (time axis) interval between DL resources and UL resources. Here, for example, the second DL / UL pattern may be applied to resources (e.g., unconfigured resources) that are not configured as DL resources and / or UL resources and / or flexible resources within the first DL / UL pattern. For example, when a DL / UL pattern in which flexible resources and / or guard times are set based on the (maximum) transmission delay of a satellite beam is referred to as a first DL / UL pattern, a second DL / UL pattern can be set for unset resources and / or flexible resources and / or guard times in the first DL / UL pattern. Here, for example, the second DL / UL pattern can be a DL / UL pattern for the purpose of supporting low-latency transmission and / or random access (e.g., Random Access Channel, etc.).

[0257] According to the proposed method of the present disclosure, by commonly applying a DL / UL pattern assuming a (maximum) time delay (or transmission delay) of a satellite beam, it is possible to support the application of possible aligned DL / UL patterns between different satellite beams (within the same satellite). In addition, by allowing (overlapping) DL / UL patterns that can be (periodically) applied in an inefficiently configured flexible resource and / or guard time and / or non-configured resource section within the DL / UL pattern according to the (maximum) time delay assumption, it is possible to support transmissions requiring low-delay characteristics.

[0258] The above [Proposal #08] can be applied in combination with other proposed methods(s) to the extent that the proposed actions do not conflict.

[0259] [Proposal #09] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) provides (cell and / or beam common) DL / UL configuration (hereinafter, a first DL / UL configuration) information to the terminal, and the terminal can derive and / or utilize a DL / UL configuration (hereinafter, a second DL / UL configuration) in which some DL resource(s) and / or some UL resource(s) in the first DL / UL configuration are converted to flexible resources and / or guard time according to UL TA (timing advance) information.

[0260] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL, or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the base station (or network node) may transmit to the terminal one or more configuration information related to the flexible resource and / or guard time (by UL TA value and / or range), and the terminal may apply the flexible resource and / or guard time configuration according to the UL TA value and / or range.

[0261] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0262] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0263] Here, in order to align the DL / UL configuration between satellite beams having different time delays (or transmission delays), the influence of increased and / or decreased flexible resources and / or guard times corresponding to the time delays (or transmission delays) of each beam can be offset by decreasing and / or increasing the DL resources and / or UL resources. This allows the length of the time period (or time interval) to which the DL / UL configuration is applied to be applied to be equally applied between satellite beams. Here, the DL / UL configuration between the satellite beams must be set so that the DL and UL do not cause interference between each other.

[0264] Here, given the time delay and very short service times of non-terrestrial networks, adjusting the DL / UL configuration information per satellite beam through signaling from the base station (or network node) whenever the time delay (or transmission delay) changes may be inefficient. For example, LEO satellites move very quickly, at approximately 7.5 km / s. Therefore, even if the base station (or network node) updates the DL / UL configuration settings, the settings may only be valid for a very short period of time. Therefore, there is a risk that a very high signaling load and / or frequent configuration mismatches may occur, which may degrade the overall communication service quality.

[0265] Accordingly, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) provides (cell common and / or beam common) DL / UL configuration (hereinafter, a first DL / UL configuration) information to the terminal, and the terminal can derive and / or utilize a DL / UL configuration (hereinafter, a second DL / UL configuration) in which some DL resource(s) and / or some UL resource(s) in the first DL / UL configuration are converted to flexible resources and / or guard times according to UL TA (timing advance) information. Here, for example, the base station (or network node) transmits one or more configuration information related to flexible resources and / or guard time (by UL TA value and / or range) to the terminal, and the terminal can apply the flexible resource and / or guard time configuration according to the UL TA value and / or range.

[0266] According to the proposed method of the present disclosure, it is possible to support the application of possible aligned DL / UL configurations between different satellite beams within the same satellite, and it has the effect of preventing cross link interference (CLI) problems by supporting the setting of flexible resources and / or guard time (within the DL / UL configuration) based on terminal-specific TA and / or DL / UL collision information. Here, for example, the flexible resources and / or guard time can be defined to include DL / UL resource(s) that collide when assuming the TA.

[0267] The above [Proposal #09] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0268] [Proposal #10] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) provides (cell and / or beam common) DL / UL configuration (hereinafter, first DL / UL configuration) information to the terminal, and the terminal can derive and / or utilize a DL / UL configuration (hereinafter, second DL / UL configuration) that adjusts the size of flexible resources and / or guard time within the first DL / UL configuration according to UL TA (timing advance) information.

[0269] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL, or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the base station (or network node) may transmit to the terminal one or more configuration information related to the flexible resource and / or guard time (by UL TA value and / or range), and the terminal may apply the flexible resource and / or guard time configuration according to the UL TA value and / or range. Here, for example, the number of DL resources and / or the number of UL resources between the first DL / UL configuration and the second DL / UL configuration may be the same. Here, for example, the size of the flexible resources and / or guard time in the second DL / UL configuration may be increased and / or decreased compared to the first DL / UL configuration.

[0270] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0271] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the DL / UL configuration in the form of a flexible resource and / or a guard time. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may be different depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, different flexible resources and / or guard times may need to be supported between satellite beams within the same satellite when applying the conventional TDD method.

[0272] Therefore, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) provides (cell and / or beam common) DL / UL configuration (hereinafter, first DL / UL configuration) information to the terminal, and the terminal can derive and / or utilize a DL / UL configuration (hereinafter, second DL / UL configuration) in which the size of a flexible resource and / or a guard time in the first DL / UL configuration is adjusted according to UL TA (timing advance) information. Here, for example, the DL resources and / or UL resources in the second DL / UL configuration may be the same as those in the first DL / UL configuration, and only the size of the flexible resource and / or the guard time may be increased and / or decreased.

[0273] According to the proposed method of the present disclosure, it is possible to support application of DL / UL configurations suitable and / or optimized for transmission delays for different satellite beams within the same satellite, and to reduce unnecessary signaling load by linking flexible resources and / or guard time information within DL / UL to UL TA.

[0274] The above [Proposal #10] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0275] FIG. 21 illustrates an example of a DL / UL configuration based on periodic DL / UL pattern activation / deactivation, according to one embodiment of the present disclosure. The embodiment of FIG. 21 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0276] [Proposal #11] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) may provide multiple DL / UL configuration information including one or more of the following methods to the terminal.

[0277] (1) Method 1

[0278] A. DL resources are activated in the (N) modulo Mth period of the (periodic) DL / UL pattern.

[0279] B. UL resources are activated in the (N) modulo Mth period of the (periodic) DL / UL pattern.

[0280] (2) Method 2

[0281] A. DL resources are activated in the (N) modulo Mth period of the (periodic) DL / UL pattern.

[0282] B. UL resources are activated in the (N+1) modulo Mth period of the (periodic) DL / UL pattern.

[0283] (3) Method 3

[0284] A. Set the number of (time axis) resources of flexible resources and / or guard time (within the DL / UL configuration) to a multiple of the number of (time axis) resources of DL resources and UL resources combined.

[0285] B. (Within the DL / UL configuration) Configure the DL resource - flexible resource and / or guard time - UL resource order.

[0286] (4) Method 4

[0287] A. Set the number of (time axis) resources of flexible resources and / or guard time (within the DL / UL configuration) to a multiple of the number of (time axis) resources of DL resources and UL resources combined.

[0288] B. (Within the DL / UL configuration) Configure the UL resource - flexible resource and / or guard time - DL resource order.

[0289] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the N and / or M may be values ​​that the base station (or network node) sets to the terminal or are agreed upon in advance. For example, M may be 2. Here, for example, the plurality of DL / UL configurations may be utilized for a specific type of signal transmission and reception. For example, it may be utilized for signal transmission and reception based on a fallback operation. Here, for example, the terminal may determine and / or utilize one DL / UL configuration (hereinafter referred to as a second DL / UL configuration) information among the plurality of DL / UL configuration (hereinafter referred to as a first DL / UL configuration) information based on UL TA (timing advance) information and / or location information.

[0290] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0291] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0292] Here, support for DL / UL configuration that does not cause DL / UL collision from the terminal perspective should also be considered. Whether or not a DL / UL collision occurs from the terminal perspective during DL / UL configuration may be difficult to determine without UL TA information (from the terminal perspective). For example, if the gap between DL and UL is not sufficiently large compared to the UL TA for the DL / UL configuration set by the base station (or network node), a collision may occur between DL reception and UL transmission. As one solution to the above problem, the base station (or network node) can set the DL / UL configuration based on the UL TA information. However, the UL TA information (at the terminal end) may not always be available to the base station (or network node). For example, the UL TA information may be reported before the terminal reports it, or the UL TA report may no longer be valid due to the passage of time. Therefore, the base station (or network) must be able to support DL / UL configuration setting in cases where the UL TA information of the terminal is uncertain.

[0293] Therefore, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) may provide a plurality of DL / UL configuration information including one or more of the following methods to the terminal.

[0294] (1) Method 1

[0295] A. DL resources are activated in the (N) modulo Mth period of the (periodic) DL / UL pattern.

[0296] B. UL resources are activated in the (N) modulo Mth period of the (periodic) DL / UL pattern.

[0297] (2) Method 2

[0298] A. DL resources are activated in the (N) modulo Mth period of the (periodic) DL / UL pattern.

[0299] B. UL resources are activated in the (N+1) modulo Mth period of the (periodic) DL / UL pattern.

[0300] (3) Method 3

[0301] A. Set the number of (time axis) resources of flexible resources and / or guard time (within the DL / UL configuration) to a multiple of the number of (time axis) resources of DL resources and UL resources combined.

[0302] B. (Within the DL / UL configuration) Configure the DL resource - flexible resource and / or guard time - UL resource order.

[0303] (4) Method 4

[0304] A. Set the number of (time axis) resources of flexible resources and / or guard time (within the DL / UL configuration) to a multiple of the number of (time axis) resources of DL resources and UL resources combined.

[0305] B. (Within the DL / UL configuration) Configure the UL resource - flexible resource and / or guard time - DL resource order.

[0306] For example, a base station (or network node) can set two DL / UL configurations according to scheme 1 and scheme 2 for a terminal. Here, it can be guaranteed that no DL / UL collision occurs in at least one of schemes 1 and 2 for any UL TA applied to the terminal. For example, FIG. 21 illustrates DL / UL configurations according to schemes 1 and 2 when N = 0 and M = 2. Here, for example, in FIG. 21, for UE1, the DL of the even-numbered DL / UL pattern is activated, and the UL of the odd-numbered DL / UL pattern is activated. Here, for example, in FIG. 21, for UE2, the DL of the odd-numbered DL / UL pattern is activated, and the UL of the odd-numbered DL / UL pattern is activated.

[0307] Here, for example, the base station (or network node) can support a fallback operation when the UL TA of the terminal is uncertain by utilizing the plurality of DL / UL configurations. For example, the base station (or network) can transmit a downlink signal for fallback purposes to the terminal, and the terminal can perform a response to the downlink signal with a transmission timing according to method 1 or method 2 according to the UL TA. Here, for example, the base station (or network node) can determine which DL / UL configuration method the terminal has applied based on the detection result for the transmission timing and response signal of the terminal, and can continue data transmission and reception based on the determined DL / UL configuration method.

[0308] According to the proposed method of the present disclosure, a base station (or network node) sets multiple DL / UL configurations to a terminal, and when transmitting a specific downlink signal, the terminal selects and responds to a DL / UL configuration that is suitable for its UL TA, thereby supporting a fallback operation and / or a recovery operation in the case where uncertainty exists about terminal-only UL TA information. Here, the base station (or network node) can determine which DL / UL configuration is finally selected by the terminal based on the detection and / or transmission timing of the response signal of the terminal, and can continue communication based on the corresponding DL / UL configuration.

[0309] The above [Proposal #11] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0310] [Proposal #11-1] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) may provide multiple DL / UL configuration information including one or more of the following methods to the terminal.

[0311] (1) Method 1

[0312] A. DL resources are activated in the Nth period satisfying N modulo M = L among (periodic) DL / UL patterns.

[0313] B. UL resources are activated in the Nth period satisfying N modulo M = L of the (periodic) DL / UL pattern.

[0314] (2) Method 2

[0315] A. DL resources are activated in the Nth period satisfying N modulo M = L1 among (periodic) DL / UL patterns.

[0316] B. UL resources are activated in the Nth period satisfying N modulo M = L2 of the (periodic) DL / UL pattern.

[0317] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the N and / or M and / or L and / or L1 and / or L2 may be values ​​that the base station (or network node) sets to the terminal or that are agreed upon in advance. For example, in method 1, M = 2, L = 0. For example, in method 2, M = 2, L1 = 0, L2 = 1. Here, for example, the plurality of DL / UL configurations may be utilized for a specific type of signal transmission and reception. For example, the plurality of DL / UL configurations may be utilized for signal transmission and reception based on a fallback operation. Here, for example, the terminal may determine and / or utilize one DL / UL configuration (hereinafter referred to as a second DL / UL configuration) information among the plurality of DL / UL configurations (hereinafter referred to as a first DL / UL configuration) information based on UL TA (timing advance) information and / or location information.

[0318] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0319] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0320] Here, support for DL / UL configuration that does not cause DL / UL collision from the terminal perspective should also be considered. Whether or not a DL / UL collision occurs from the terminal perspective during DL / UL configuration may be difficult to determine without UL TA information (from the terminal perspective). For example, if the gap between DL and UL is not sufficiently large compared to the UL TA for the DL / UL configuration set by the base station (or network node), a collision may occur between DL reception and UL transmission. As one solution to the above problem, the base station (or network node) can set the DL / UL configuration based on the UL TA information. However, the UL TA information (at the terminal end) may not always be available to the base station (or network node). For example, the UL TA information may be reported before the terminal reports it, or the UL TA report may no longer be valid due to the passage of time. Therefore, the base station (or network) must be able to support DL / UL configuration setting in cases where the UL TA information of the terminal is uncertain.

[0321] Therefore, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) may provide a plurality of DL / UL configuration information including one or more of the following methods to the terminal.

[0322] (1) Method 1

[0323] A. DL resources are activated in the Nth period satisfying N modulo M = L among (periodic) DL / UL patterns.

[0324] B. UL resources are activated in the Nth period satisfying N modulo M = L of the (periodic) DL / UL pattern.

[0325] (2) Method 2

[0326] A. DL resources are activated in the Nth period satisfying N modulo M = L1 among (periodic) DL / UL patterns.

[0327] B. UL resources are activated in the Nth period satisfying N modulo M = L2 of the (periodic) DL / UL pattern (provided that L1 ≠ L2).

[0328] For example, a base station (or network node) can set two DL / UL configurations according to scheme 1 and scheme 2 for a terminal. Here, it can be guaranteed that no DL / UL collision occurs in at least one of schemes 1 and 2 for any UL TA applied to the terminal. For example, FIG. 21 illustrates DL / UL configurations according to schemes 1 and 2 when M = 2 and L = 0 for scheme 1 and M = 2, L1 = 0 and L2 = 1 for scheme 2. Here, for example, in FIG. 21, for UE1, the DL of the even-numbered DL / UL pattern is activated and the DL of the odd-numbered DL / UL pattern is activated. Here, for example, in FIG. 21, for UE2, the DL of the odd-numbered DL / UL pattern is activated and the UL of the odd-numbered DL / UL pattern is activated.

[0329] Here, for example, the base station (or network node) can support a fallback operation when the UL TA of the terminal is uncertain by utilizing the plurality of DL / UL configurations. For example, the base station (or network) can transmit a downlink signal for fallback purposes to the terminal, and the terminal can perform a response to the downlink signal with a transmission timing according to method 1 or method 2 according to the UL TA. Here, for example, the base station (or network node) can determine which DL / UL configuration method the terminal has applied based on the detection result for the transmission timing and response signal of the terminal, and can continue data transmission and reception based on the determined DL / UL configuration method.

[0330] According to the proposed method of the present disclosure, a base station (or network node) sets multiple DL / UL configurations to a terminal, and when transmitting a specific downlink signal, the terminal selects and responds to a DL / UL configuration that is suitable for its UL TA, thereby supporting a fallback operation and / or a recovery operation in the case where uncertainty exists about terminal-level UL TA information. Here, for example, the base station (or network node) can determine which DL / UL configuration is finally selected by the terminal based on the detection and / or transmission timing of the response signal of the terminal, and can continue communication based on the corresponding DL / UL configuration.

[0331] The above [Proposal #11-1] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0332] [Proposal #12] When a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) provides a plurality of DL / UL configuration information to one terminal, and the terminal can determine and / or utilize one DL / UL configuration (hereinafter referred to as a second DL / UL configuration) information among the plurality of DL / UL configuration (hereinafter referred to as a first DL / UL configuration) information based on UL TA (timing advance) information and / or location information.

[0333] Here, for example, the DL / UL pattern may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resource(s) (e.g., slots) and / or guard time configuration information within a (certain) time period and / or time interval. Here, for example, the flexible resource may mean a resource that can be utilized for DL ​​or UL or a resource that can be utilized as DL when UL is not transmitted. Here, for example, the second DL / UL configuration may be utilized for a specific type of signal transmission and reception. For example, it may be utilized for signal transmission and reception based on a fallback operation. Here, for example, when transmitting an uplink response signal for a DL transmission transmitted by the base station (or network node), the terminal may determine a transmission timing and / or transmission resource based on the second DL / UL configuration.

[0334] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0335] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0336] Here, support for DL / UL configuration that does not cause DL / UL collision from the terminal perspective should also be considered. Whether or not a DL / UL collision occurs from the terminal perspective during DL / UL configuration may be difficult to determine without UL TA information (from the terminal perspective). For example, if the gap between DL and UL is not sufficiently large compared to the UL TA for the DL / UL configuration set by the base station (or network node), a collision may occur between DL reception and UL transmission. As one solution to the above problem, the base station (or network node) can set the DL / UL configuration based on the UL TA information. However, the UL TA information (at the terminal end) may not always be available to the base station (or network node). For example, the UL TA information may be reported before the terminal reports it, or the UL TA report may no longer be valid due to the passage of time. Therefore, the base station (or network) must be able to support DL / UL configuration setting in cases where the UL TA information of the terminal is uncertain.

[0337] Therefore, in the present disclosure, when a base station (or network node) in a non-terrestrial network provides DL / UL configuration information including one or more DL / UL patterns to a terminal, the base station (or network node) provides a plurality of DL / UL configuration information to the terminal, and the terminal can determine and / or utilize one DL / UL configuration (hereinafter referred to as a second DL / UL configuration) information among the plurality of DL / UL configuration (hereinafter referred to as a first DL / UL configuration) information based on UL TA (timing advance) information and / or location information. Here, even when the UL TA and / or location information of the terminal has any value, at least one DL / UL configuration that does not cause DL / UL collision must be included in the plurality of DL / UL configurations. Here, for example, the terminal can select and / or apply an applied DL / UL configuration among the plurality of DL / UL configuration(s) based on the UL TA and / or location information at least for a specific type of data transmission and reception.

[0338] According to the proposed method of the present disclosure, a base station (or network node) sets multiple DL / UL configurations to a terminal, and when transmitting a specific downlink signal, the terminal selects and responds to the DL / UL configuration according to the UL TA and / or location information, thereby supporting a fallback operation and / or a recovery operation in the case where there is uncertainty about the UL TA and / or location information of the terminal. Here, for example, the base station (or network node) can determine which DL / UL configuration is finally selected by the terminal based on the detection and / or transmission timing of the response signal of the terminal, and can continue communication based on the corresponding DL / UL configuration.

[0339] The above [Proposal #12] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0340] FIG. 22 illustrates an example of a UL TA pre-compensation-based DL / UL configuration and UL TA application according to an embodiment of the present disclosure. The embodiment of FIG. 22 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0341] [Proposal #13] In a non-terrestrial network, a base station (or network node) can set and / or provide UL TA pre-compensation information to a terminal, which includes one or more of the following information:

[0342] (1) Pre-compensated UL TA value

[0343] (2) Reference point and / or reference location for calculating pre-compensated UL TA values.

[0344] The terminal may reflect the above UL TA pre-compensation information and perform application and / or reporting on the remaining residual UL TA values.

[0345] Here, for example, the base station (or network node) can support the UL TA pre-compensation in the form of shifting the UL frame boundary compared to the DL. Here, for example, the terminal can calculate the pre-compensated UL TA value by utilizing information such as a reference point and / or a reference position and / or a satellite ephemeris and / or a transmission delay between a satellite and a feeder link and / or a common TA. Here, for example, the common TA means a TA value applied between a satellite and a (specific) RP (reference point), and the base station (or network node) can set and / or provide it to the terminal.

[0346] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0347] Here, in non-terrestrial networks, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in the conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the DL / UL configuration in the form of a flexible resource and / or a guard time. Here, in non-terrestrial networks, the time delay (or transmission delay) and the corresponding DL-to-UL guard time may be relatively large compared to terrestrial networks depending on the service angle and / or elevation angle of the satellite beam. Therefore, there may be a relatively large number of resources that must be set as flexible resources and / or guard times when configuring the DL / UL. Here, the flexible resources and / or guard time may be resources that are difficult to fully utilize depending on the implementation method of the base station (or network node), and it may be desirable to keep them to the minimum possible.

[0348] Therefore, in the present disclosure, a base station (or network node) in a non-terrestrial network sets and / or provides UL TA pre-compensation information including one or more of the following information to a terminal,

[0349] (1) Pre-compensated UL TA value

[0350] (2) Reference point and / or reference location for calculating pre-compensated UL TA values.

[0351] The terminal can reflect the above UL TA pre-compensation information and perform application and / or reporting on the remaining residual UL TA value. Here, since the DL-to-UL guard time required at the terminal end is proportional to the size of the UL TA value, if the UL TA value is limited to the remaining UL TA excluding the above pre-compensation value, the required DL-to-UL guard time can be reduced.

[0352] For example, Fig. 22 shows a DL / UL configuration and a residual TA in a terminal when UL TA is pre-compensated. Here, for example, a base station (or network node) can pre-compensate a portion of the UL TA value by delaying the UL frame boundary relative to the DL. Here, for example, the base station (or network node) can set and / or provide information on the pre-compensated UL TA value to the terminal, and the terminal can reflect the pre-compensated UL TA value when applying and / or reporting the UL TA. For example, the terminal can subtract the pre-compensated UL TA value from the UL TA, and apply and / or report only the remaining residual UL TA value.

[0353] According to the proposed method of the present disclosure, the size of flexible resources and / or guard time within the DL / UL configuration can be set relatively small, and there is an advantage of reducing scheduling constraints and / or overhead.

[0354] The above [Proposal #13] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0355] [Proposal #14] In a non-terrestrial network, a base station (or network node) may set and / or instruct a terminal to set specific reference points and / or reference location information, and the terminal may report one or more of the following information to the base station (or network node).

[0356] (1) Time delay (or transmission delay) information between the terminal and the reference point and / or reference location;

[0357] (2) Distance information from the terminal and / or reference point and / or reference location

[0358] (3) (Terminal) Angle information with the above reference point and / or reference position

[0359] Here, for example, the base station (or network node) can predict the interference impact that the terminal may have on the specific reference point and / or reference location based on the report of the terminal. Here, for example, the base station (or network node) can set and / or indicate the reference point and / or reference location information for each cell and / or each satellite beam and / or each altitude. Here, for example, the base station (or network node) can set and / or indicate a target value of the transmission power and / or reception power and / or an upper limit value of the transmission power and / or reception power at the corresponding reference point and / or reference location information for each reference point and / or reference location information.

[0360] For example, in a next-generation mobile communication system according to an embodiment of the present disclosure, let us assume that a base station (or network node) serves (terrestrial) terminals and / or (air) terminals in a TDD manner based on a non-terrestrial network. For example, the base station (or network node) may support downlink and / or uplink transmission to the terrestrial terminals and / or air terminals in a TDD manner via a satellite. Here, the TDD configuration may mean DL / UL configuration information including one or more DL / UL patterns, and the DL / UL patterns may mean DL time resource(s) (e.g., slots) and / or UL time resource(s) (e.g., slots) and / or flexible resources and / or guard time configuration information within a (certain) time period and / or time interval.

[0361] Here, in a non-terrestrial network, there may be difficulties in supporting the TDD method due to a large time delay (or transmission delay) due to high altitude. For example, in a conventional TDD method, a DL-to-UL guard time considering the round trip time (RTT) is included in the DL / UL configuration. For example, the DL-to-UL guard time may be included in the form of a flexible resource and / or a guard time in the DL / UL configuration. Here, since the time delay (or transmission delay) and the corresponding DL-to-UL guard time may differ depending on the service angle and / or elevation angle of the satellite beam in a non-terrestrial network, when a conventional TDD method is applied, there may be cases where the DL / UL configurations collide with each other due to different flexible resources and / or guard times between satellite beams within the same satellite.

[0362] Here, when two different UEs are served by different satellite beams and DL / UL configurations, cross-layer interference (CLI) between the UEs may occur. For example, when UE 1 receives a downlink signal through satellite beam 1, UE 2 may transmit an uplink signal through satellite beam 2. Here, the uplink signal transmission time of UE 2 may overlap with the DL resources in the DL / UL configuration applied to UE 1 and satellite beam 1 in the time axis, and UE 2 may cause strong CLI to UE 1.

[0363] Therefore, in the present disclosure, a base station (or network node) in a non-terrestrial network sets and / or instructs a terminal to set and / or instruct a specific reference point and / or reference location information, and the terminal can report one or more of the following information to the base station (or network node).

[0364] (1) Time delay (or transmission delay) information between the terminal and the reference point and / or reference location;

[0365] (2) Distance information from the terminal and / or reference point and / or reference location

[0366] (3) (Terminal) Angle information with the above reference point and / or reference position

[0367] Here, for example, the base station (or network node) can predict the interference impact that the terminal may have on the specific reference point and / or reference location based on the report of the terminal. Here, for example, the base station (or network node) can set and / or indicate the reference point and / or reference location information for each cell and / or each satellite beam and / or each altitude. Here, for example, the base station (or network node) can set and / or indicate a target value of the transmission power and / or reception power and / or an upper limit value of the transmission power and / or reception power at the corresponding reference point and / or reference location information for each reference point and / or reference location information.

[0368] According to the proposed method of the present disclosure, the base station (or network node) transmits information on a specific reference point and / or reference position of an adjacent beam to the terminal, and the terminal can report information such as distance / angle / transmission delay to the reference point and / or reference position. The base station (or network node) can control the CLI influence of the adjacent beam and / or terminal based on the terminal report. For example, the base station (or network node) can restrict the terminal power so that the transmission and / or reception power to the specific reference point and / or reference position is below a certain level.

[0369] The above [Proposal #14] can be applied in combination with other proposed methods as long as the proposed actions do not conflict.

[0370] For example, in the embodiments of the present disclosure, TDD setup and utilization are not limited to TDD bands, and can be extended to FDD bands and / or specific DL bands and / or UL band combinations.

[0371] For example, in embodiments of the present disclosure, the base station or network node may be a satellite. For example, the base station or network node may be a transparent satellite. For example, the base station or network node may be a regenerative satellite.

[0372] The combination of embodiments of the present disclosure may operate in conjunction with each other.

[0373] Various embodiments of the present disclosure may be applied differently depending on the link type (DL, UL, SL), and / or the data type (SIB, groupcast, unicast), and / or the search space type in which the scheduling PDCCH is detected (common search space (CSS), UE-specific search space (USS)), and / or the base station node type, and / or the altitude, and / or the presence or absence of power constraints. For example, a combination of various embodiments of the present disclosure may be applied only when related to SIB transmission.

[0374] FIG. 23 illustrates a method for a first device to perform wireless communication, according to an embodiment of the present disclosure. The embodiment of FIG. 23 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0375] Referring to FIG. 23, in step S2310, the first device can obtain an uplink timing advance. In step S2320, the first device can perform communication based on uplink and downlink settings related to the uplink timing advance.

[0376] For example, the communication may be performed based on at least one of a flexible resource or a guard time associated with the uplink / downlink configuration. For example, at least one of the flexible resource or the guard time may be based on the uplink timing advance.

[0377] For example, the communication may be performed based on the uplink downlink configuration associated with a remainder value obtained by dividing the uplink timing advance by a period associated with the uplink downlink configuration.

[0378] For example, the communication may be performed based on the deactivation of at least one of the uplink resources or downlink resources associated with the uplink / downlink configuration. For example, the deactivation of at least one of the uplink resources or downlink resources may be based on the uplink timing advance.

[0379] For example, the uplink / downlink configuration may include configurations related to a first time interval and configurations related to a second time interval. For example, resources related to at least one of the downlink or the uplink may be repeated in units of the first time interval. For example, the second time interval may be set to a multiple of the first time interval. For example, the configuration related to the second time interval may include a pattern for activating or deactivating the resources related to at least one of the downlink or the uplink in units of the first time interval.

[0380] For example, the above uplink / downlink settings may be related to at least one of the service target area or target location information.

[0381] For example, the communication may be performed with a second device. For example, the uplink transmission included in the communication may include identification information. For example, the identification information may include at least one of satellite identification information associated with the second device, satellite ephemeris information associated with the second device, gateway identification information associated with the second device, base station identification information associated with the second device, or network node identification information associated with the second device.

[0382] For example, the uplink / downlink configuration may include a statically configured uplink / downlink configuration including a third time interval and a dynamically configured uplink / downlink configuration including a fourth time interval. For example, the fourth time interval may be dynamically activated in the third time interval.

[0383] For example, the uplink / downlink configuration may include a first pattern and a second pattern. For example, the second pattern may be applied to at least one of the resources included in the first pattern.

[0384] For example, the above uplink downlink settings may be selected based on the uplink timing advance among the uplink downlink settings.

[0385] For example, the communication may be performed with a second device. For example, the uplink timing advance may be based on at least one of a pre-compensated uplink timing advance received from the second device or a reference for the pre-compensated uplink timing advance. For example, the reference may include at least one of a reference point or a reference position.

[0386] For example, the communication may be performed with a second device. For example, the first device may receive a reference from the second device. For example, the first device may report time delay information related to the reference, distance information from the reference, or angle information from the reference to the second device. For example, the reference may include at least one of a reference point or a reference position.

[0387] For example, communication may be performed based on the uplink / downlink configuration related to the uplink timing advance and the uplink / downlink configuration related to the uplink / downlink collision information related to the uplink timing advance. For example, the communication may be performed with a second device. For example, the first device may be a terminal. For example, the second device may be a base station or a network node.

[0388] The above proposed method can be applied to devices according to various embodiments of the present disclosure. First, the processor (102) of the first device (100) can obtain an uplink timing advance (for example, the processor (102) of the first device (100) can control the transceiver (106) to obtain the uplink timing advance). Then, the processor (102) of the first device (100) can perform communication based on an uplink / downlink setting related to the uplink timing advance (for example, the processor (102) of the first device (100) can control the transceiver (106) to perform communication based on an uplink / downlink setting related to the uplink timing advance).

[0389] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause the first device to: obtain an uplink timing advance; and perform communication based on uplink and downlink settings related to the uplink timing advance.

[0390] For example, the communication may be performed based on at least one of a flexible resource or a guard time associated with the uplink / downlink configuration. For example, at least one of the flexible resource or the guard time may be based on the uplink timing advance.

[0391] For example, the communication may be performed based on the uplink downlink configuration associated with a remainder value obtained by dividing the uplink timing advance by a period associated with the uplink downlink configuration.

[0392] For example, the communication may be performed based on the deactivation of at least one of the uplink resources or downlink resources associated with the uplink / downlink configuration. For example, the deactivation of at least one of the uplink resources or downlink resources may be based on the uplink timing advance.

[0393] For example, the uplink / downlink configuration may include configurations related to a first time interval and configurations related to a second time interval. For example, resources related to at least one of the downlink or the uplink may be repeated in units of the first time interval. For example, the second time interval may be set to a multiple of the first time interval. For example, the configuration related to the second time interval may include a pattern for activating or deactivating the resources related to at least one of the downlink or the uplink in units of the first time interval.

[0394] For example, the above uplink / downlink settings may be related to at least one of the service target area or target location information.

[0395] For example, the communication may be performed with a second device. For example, the uplink transmission included in the communication may include identification information. For example, the identification information may include at least one of satellite identification information associated with the second device, satellite ephemeris information associated with the second device, gateway identification information associated with the second device, base station identification information associated with the second device, or network node identification information associated with the second device.

[0396] For example, the uplink / downlink configuration may include a statically configured uplink / downlink configuration including a third time interval and a dynamically configured uplink / downlink configuration including a fourth time interval. For example, the fourth time interval may be dynamically activated in the third time interval.

[0397] For example, the uplink / downlink configuration may include a first pattern and a second pattern. For example, the second pattern may be applied to at least one of the resources included in the first pattern.

[0398] For example, the above uplink downlink settings may be selected based on the uplink timing advance among the uplink downlink settings.

[0399] For example, the communication may be performed with a second device. For example, the uplink timing advance may be based on at least one of a pre-compensated uplink timing advance received from the second device or a reference for the pre-compensated uplink timing advance. For example, the reference may include at least one of a reference point or a reference position.

[0400] For example, the communication may be performed with a second device. For example, the first device may receive a reference from the second device. For example, the first device may report time delay information related to the reference, distance information from the reference, or angle information from the reference to the second device. For example, the reference may include at least one of a reference point or a reference position.

[0401] For example, communication may be performed based on the uplink / downlink configuration related to the uplink timing advance and the uplink / downlink configuration related to the uplink / downlink collision information related to the uplink timing advance. For example, the communication may be performed with a second device. For example, the first device may be a terminal. For example, the second device may be a base station or a network node.

[0402] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause a first device to: obtain an uplink timing advance; and perform communication based on uplink and downlink settings related to the uplink timing advance.

[0403] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium storing commands may be provided. For example, the commands, when executed, may cause a first device to: acquire an uplink timing advance; and perform communication based on uplink and downlink settings associated with the uplink timing advance.

[0404] FIG. 24 illustrates a method for a second device to perform wireless communication according to an embodiment of the present disclosure. The embodiment of FIG. 24 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0405] Referring to FIG. 24, in step S2410, the second device may receive information related to uplink timing advance. In step S2420, the second device may perform communication based on uplink and downlink settings related to the uplink timing advance.

[0406] For example, the communication may be performed based on at least one of a flexible resource or a guard time associated with the uplink / downlink configuration. For example, at least one of the flexible resource or the guard time may be based on the uplink timing advance.

[0407] For example, the communication may be performed based on the uplink downlink configuration associated with a remainder value obtained by dividing the uplink timing advance by a period associated with the uplink downlink configuration.

[0408] For example, the communication may be performed based on the deactivation of at least one of the uplink resources or downlink resources associated with the uplink / downlink configuration. For example, the deactivation of at least one of the uplink resources or downlink resources may be based on the uplink timing advance.

[0409] For example, the uplink / downlink configuration may include configurations related to a first time interval and configurations related to a second time interval. For example, resources related to at least one of the downlink or the uplink may be repeated in units of the first time interval. For example, the second time interval may be set to a multiple of the first time interval. For example, the configuration related to the second time interval may include a pattern for activating or deactivating the resources related to at least one of the downlink or the uplink in units of the first time interval.

[0410] For example, the above uplink / downlink settings may be related to at least one of the service target area or target location information.

[0411] For example, the communication may be performed with a first device. For example, an uplink transmission included in the communication may include identification information. For example, the identification information may include at least one of satellite identification information associated with the second device, satellite ephemeris information associated with the second device, gateway identification information associated with the second device, base station identification information associated with the second device, or network node identification information associated with the second device.

[0412] For example, the uplink / downlink configuration may include a statically configured uplink / downlink configuration including a third time interval and a dynamically configured uplink / downlink configuration including a fourth time interval. For example, the fourth time interval may be dynamically activated in the third time interval.

[0413] For example, the uplink / downlink configuration may include a first pattern and a second pattern. For example, the second pattern may be applied to at least one of the resources included in the first pattern.

[0414] For example, the above uplink downlink settings may be selected based on the uplink timing advance among the uplink downlink settings.

[0415] For example, the communication may be performed with the first device. For example, the uplink timing advance may be based on at least one of a transmitted pre-compensated uplink timing advance or a reference for the pre-compensated uplink timing advance. For example, the reference may include at least one of a reference point or a reference position.

[0416] For example, the communication may be performed with a first device. For example, the second device may transmit a reference to the first device. For example, the second device may receive time delay information related to the reference, distance information from the reference, or angle information from the reference from the first device. For example, the reference may include at least one of a reference point or a reference position.

[0417] For example, communication may be performed based on the uplink / downlink configuration related to the uplink timing advance and the uplink / downlink configuration related to the uplink / downlink collision information related to the uplink timing advance. For example, the communication may be performed with a first device. For example, the first device may be a terminal. For example, the second device may be a base station or a network node.

[0418] The above proposed method can be applied to devices according to various embodiments of the present disclosure. First, the processor (202) of the second device (200) can receive information related to uplink timing advance (for example, the processor (202) of the second device (200) can control the transceiver (206) to receive information related to uplink timing advance). Then, the processor (202) of the second device (200) can perform communication based on uplink / downlink settings related to the uplink timing advance (for example, the processor (202) of the second device (200) can control the transceiver (206) to perform communication based on uplink / downlink settings related to the uplink timing advance).

[0419] According to one embodiment of the present disclosure, a second device may be provided. For example, the second device may include at least one transceiver; at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause the second device to: receive information related to an uplink timing advance; and cause the second device to perform communication based on uplink and downlink configurations related to the uplink timing advance.

[0420] For example, the communication may be performed based on at least one of a flexible resource or a guard time associated with the uplink / downlink configuration. For example, at least one of the flexible resource or the guard time may be based on the uplink timing advance.

[0421] For example, the communication may be performed based on the uplink downlink configuration associated with a remainder value obtained by dividing the uplink timing advance by a period associated with the uplink downlink configuration.

[0422] For example, the communication may be performed based on the deactivation of at least one of the uplink resources or downlink resources associated with the uplink / downlink configuration. For example, the deactivation of at least one of the uplink resources or downlink resources may be based on the uplink timing advance.

[0423] For example, the uplink / downlink configuration may include configurations related to a first time interval and configurations related to a second time interval. For example, resources related to at least one of the downlink or the uplink may be repeated in units of the first time interval. For example, the second time interval may be set to a multiple of the first time interval. For example, the configuration related to the second time interval may include a pattern for activating or deactivating the resources related to at least one of the downlink or the uplink in units of the first time interval.

[0424] For example, the above uplink / downlink settings may be related to at least one of the service target area or target location information.

[0425] For example, the communication may be performed with a first device. For example, an uplink transmission included in the communication may include identification information. For example, the identification information may include at least one of satellite identification information associated with the second device, satellite ephemeris information associated with the second device, gateway identification information associated with the second device, base station identification information associated with the second device, or network node identification information associated with the second device.

[0426] For example, the uplink / downlink configuration may include a statically configured uplink / downlink configuration including a third time interval and a dynamically configured uplink / downlink configuration including a fourth time interval. For example, the fourth time interval may be dynamically activated in the third time interval.

[0427] For example, the uplink / downlink configuration may include a first pattern and a second pattern. For example, the second pattern may be applied to at least one of the resources included in the first pattern.

[0428] For example, the above uplink downlink settings may be selected based on the uplink timing advance among the uplink downlink settings.

[0429] For example, the communication may be performed with the first device. For example, the uplink timing advance may be based on at least one of a transmitted pre-compensated uplink timing advance or a reference for the pre-compensated uplink timing advance. For example, the reference may include at least one of a reference point or a reference position.

[0430] For example, the communication may be performed with a first device. For example, the second device may transmit a reference to the first device. For example, the second device may receive time delay information related to the reference, distance information from the reference, or angle information from the reference from the first device. For example, the reference may include at least one of a reference point or a reference position.

[0431] For example, communication may be performed based on the uplink / downlink configuration related to the uplink timing advance and the uplink / downlink configuration related to the uplink / downlink collision information related to the uplink timing advance. For example, the communication may be performed with a first device. For example, the first device may be a terminal. For example, the second device may be a base station or a network node.

[0432] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause a second device to: receive information related to an uplink timing advance; and cause the second device to perform communication based on an uplink / downlink configuration related to the uplink timing advance.

[0433] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium having instructions recorded thereon may be provided. For example, the instructions, when executed, may cause a second device to: receive information related to uplink timing advance; and cause the second device to perform communication based on uplink and downlink settings related to the uplink timing advance.

[0434] According to the present disclosure, the first device and / or the second device autonomously apply (TDD) uplink / downlink configurations associated with the UL TA values ​​(e.g., positions of DL time resources and / or UL time resources, lengths of guard times and / or flexible resources, and selection of collision-free patterns among multiple patterns) to perform communication. As a result, DL / UL collisions and CLIs are prevented from the source, so that inter-beam and / or inter-terminal interference is significantly reduced, and control overhead and system complexity are reduced because base stations and / or network nodes and / or satellites do not need to repeatedly re-signal patterns, and only the guard times and / or flexible resources that are actually required are maintained, so that spectrum utilization efficiency and delay performance are simultaneously improved. Additionally, even if TA values ​​drift or reporting is delayed, the device can automatically switch to a conservative pattern to ensure service continuity, and the same principle applies to multi-beam and / or multi-satellite and / or terrestrial network coexistence scenarios, providing the effect of improving system-wide operational flexibility and resource efficiency.

[0435] The various embodiments of the present disclosure may be combined with each other, and some descriptions, functions, procedures, proposals, methods and / or operations of the various embodiments may be omitted.

[0436] The above proposed method can be applied to the device described below. First, the processor (202) of the receiving terminal can set at least one partial bandwidth (e.g., BWP; bandwidth part). Then, the processor (202) of the receiving terminal can control the transceiver (206) of the receiving terminal to receive a physical channel related to terminal-to-terminal communication (e.g., SL communication) and / or a reference signal related to terminal-to-terminal communication (e.g., SL communication) from the transmitting terminal on at least one partial bandwidth (e.g., BWP).

[0437] Below, a description is given of devices to which various embodiments of the present disclosure can be applied.

[0438] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document may be applied to various fields requiring wireless communication / connectivity (e.g., 5G) between devices.

[0439] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0440] FIG. 25 illustrates a communication system (1) according to one embodiment of the present disclosure. The embodiment of FIG. 25 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0441] Referring to FIG. 25, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and / or an Aerial Vehicle (AV) (e.g., an Advanced Air Mobility (AAM)). The XR device may include an Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) device, and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. The portable device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc. The home appliance may include a TV, a refrigerator, a washing machine, etc. The IoT device may include a sensor, a smart meter, etc. For example, a base station and a network may also be implemented as a wireless device, and a specific wireless device (200a) may operate as a base station / network node to other wireless devices.

[0442] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented with standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may perform communication based on LTE-M technology. At this time, for example, LTE-M technology may be an example of LPWAN technology, and may be called by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology can be implemented by at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification can include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-described names. For example, ZigBee technology can create personal area networks (PAN) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

[0443] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0444] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and base station-to-base station communication (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present disclosure.

[0445] FIG. 26 illustrates a wireless device according to an embodiment of the present disclosure. The embodiment of FIG. 26 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0446] Referring to FIG. 26, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 25.

[0447] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). Furthermore, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0448] A second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). In addition, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0449] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0450] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0451] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0452] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0453] FIG. 27 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure. The embodiment of FIG. 27 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0454] Referring to FIG. 27, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Although not limited thereto, the operations / functions of FIG. 27 may be performed in the processor (102, 202) and / or the transceiver (106, 206) of FIG. 26. The hardware elements of FIG. 27 may be implemented in the processor (102, 202) and / or the transceiver (106, 206) of FIG. 26. For example, blocks 1010 to 1060 may be implemented in the processor (102, 202) of FIG. 26. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 26, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 26.

[0455] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 27. Here, the codeword is an encoded bit sequence of an information block. The information block can include a transport block (e.g., an UL-SCH transport block, a DL-SCH transport block). The wireless signal can be transmitted through various physical channels (e.g., a PUSCH or a PDSCH).

[0456] Specifically, the codeword can be converted into a bit sequence scrambled by a scrambler (1010). The scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of the wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020). The modulation method may include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding). The output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by a precoding matrix W of N*M. Here, N is the number of antenna ports, and M is the number of transmission layers. Here, the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on complex modulation symbols. In addition, the precoder (1040) can perform precoding without performing transform precoding.

[0457] The resource mapper (1050) can map modulation symbols of each antenna port to time-frequency resources. The time-frequency resources can include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. The signal generator (1060) generates a wireless signal from the mapped modulation symbols, and the generated wireless signal can be transmitted to another device through each antenna. To this end, the signal generator (1060) can include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0458] The signal processing process for receiving signals in a wireless device can be configured in reverse order of the signal processing process (1010 to 1060) of FIG. 27. For example, a wireless device (e.g., 100, 200 of FIG. 26) can receive wireless signals from the outside through an antenna port / transceiver. The received wireless signals can be converted into baseband signals through a signal restorer. For this purpose, the signal restorer can include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Thereafter, the baseband signal can be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descrambling process. The codewords can be restored to the original information blocks through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0459] Figure 28 illustrates a wireless device according to an embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use case / service (see Figure 25). The embodiment of Figure 28 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0460] Referring to FIG. 28, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 26 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 26. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 26. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0461] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 25, 100a), a vehicle (Fig. 25, 100b-1, 100b-2), an XR device (Fig. 25, 100c), a portable device (Fig. 25, 100d), a home appliance (Fig. 25, 100e), an IoT device (Fig. 25, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 25, 400), a base station (Fig. 25, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0462] In FIG. 28, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and the first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be configured as one or more processor sets. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0463] Below, the implementation example of Fig. 28 is described in more detail with reference to the drawings.

[0464] FIG. 29 illustrates a mobile device according to an embodiment of the present disclosure. The mobile device may include a smartphone, a smart pad, a wearable device (e.g., a smartwatch, smartglasses), or a portable computer (e.g., a laptop, etc.). The mobile device may be referred to as a Mobile Station (MS), a User Terminal (UT), a Mobile Subscriber Station (MSS), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or a Wireless Terminal (WT). The embodiment of FIG. 29 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0465] Referring to FIG. 29, the portable device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b), and an input / output unit (140c). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130 / 140 of FIG. 28, respectively.

[0466] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (120) can control components of the mobile device (100) to perform various operations. The control unit (120) can include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / codes / commands required for operating the mobile device (100). In addition, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the mobile device (100) and can include a wired / wireless charging circuit, a battery, etc. The interface unit (140b) can support connection between the mobile device (100) and other external devices. The interface unit (140b) can include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can input or output video information / signals, audio information / signals, data, and / or information input from a user. The input / output unit (140c) may include a camera, a microphone, a user input unit, a display unit (140d), a speaker, and / or a haptic module.

[0467] For example, in the case of data communication, the input / output unit (140c) obtains information / signals (e.g., touch, text, voice, image, video) input by the user, and the obtained information / signals can be stored in the memory unit (130). The communication unit (110) converts the information / signals stored in the memory into wireless signals, and can directly transmit the converted wireless signals to other wireless devices or to a base station. In addition, the communication unit (110) can receive wireless signals from other wireless devices or base stations, and then restore the received wireless signals to the original information / signals. The restored information / signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (140c).

Claims

1. In the method, A step for a first device to obtain an uplink timing advance; and A method comprising: a step of the first device performing communication based on uplink and downlink settings related to the uplink timing advance; 2. In paragraph 1, The above communication is performed based on at least one of a flexible resource or guard time related to the above uplink / downlink configuration, and A method wherein at least one of the flexible resources or the guard time is based on the uplink timing advance.

3. In paragraph 1, A method wherein the above communication is performed based on the uplink downlink configuration associated with the remainder value obtained by dividing the uplink timing advance by a period associated with the uplink downlink configuration.

4. In paragraph 1, The above communication is performed based on the deactivation of at least one of the uplink resources or downlink resources related to the above uplink downlink configuration, and A method wherein the deactivation of at least one of the uplink resources or the downlink resources is based on the uplink timing advance.

5. In paragraph 1, The above uplink / downlink settings include settings related to a first time interval and settings related to a second time interval, Resources related to at least one of downlink and uplink are repeated in units of the first time interval, The second time interval is set to a multiple of the first time interval, and A method wherein the setting related to the second time interval includes a pattern for activating or deactivating the resource related to at least one of the downlink or the uplink in units of the first time interval.

6. In paragraph 1, A method wherein the above uplink and downlink settings are related to at least one of the service target area or target location information.

7. In paragraph 1, The above communication is performed with a second device, The uplink transmission included in the above communication includes identification information, and A method according to claim 1, wherein the identification information comprises at least one of satellite identification information associated with the second device, satellite ephemeris information associated with the second device, gateway identification information associated with the second device, base station identification information associated with the second device, or network node identification information associated with the second device.

8. In paragraph 1, The above uplink downlink setting includes a statically set uplink downlink setting including a third time interval and a dynamically set uplink downlink setting including a fourth time interval, A method wherein the fourth time interval is dynamically activated in the third time interval.

9. In paragraph 1, The above uplink and downlink settings include a first pattern and a second pattern, A method wherein the second pattern is applied to at least one of the resources included in the first pattern.

10. In paragraph 1, A method in which the above uplink and downlink settings are selected based on the above uplink timing advance among the uplink and downlink settings.

11. In paragraph 1, The above communication is performed with a second device, The uplink timing advance is based on at least one of a pre-compensated uplink timing advance received from the second device or a reference for the pre-compensated uplink timing advance, and A method wherein the above criteria includes at least one of a reference point or a reference position.

12. In paragraph 1, The above communication is performed with a second device, A step in which the first device receives a reference from the second device; The first device further includes a step of reporting time delay information related to the reference, distance information with respect to the reference, or angle information with respect to the reference to the second device; A method wherein the above criteria includes at least one of a reference point or a reference position.

13. In paragraph 1, Communication is performed based on the uplink downlink setting related to the uplink timing advance and the uplink downlink setting related to the uplink downlink collision information related to the uplink timing advance, The above communication is performed with a second device, The above first device is a terminal, and A method wherein the second device is a base station or a network node.

14. In the first device, At least one transmitter / receiver; at least one processor; and At least one memory connected to said at least one processor and storing instructions, said instructions being executed by said at least one processor, wherein said first device causes: To obtain uplink timing advance; and A first device that performs communication based on uplink and downlink settings related to the above uplink timing advance.

15. In the processing device, at least one processor; and At least one memory connected to said at least one processor and storing instructions, said instructions being executed by said at least one processor, wherein said first device causes: To obtain uplink timing advance; and A processing device that performs communication based on uplink and downlink settings related to the above uplink timing advance.

16. A non-transitory computer-readable storage medium that records commands, The above commands, when executed, cause the first device to: To obtain uplink timing advance; and A non-transitory computer-readable storage medium for performing communication based on uplink and downlink settings related to the above uplink timing advance.

17. In the method, A step for a second device to receive information related to uplink timing advance; and A method comprising: a step of the second device performing communication based on uplink and downlink settings related to the uplink timing advance.

18. In the second device, At least one transmitter / receiver; at least one processor; and At least one memory connected to said at least one processor and storing instructions, said instructions being executed by said at least one processor, wherein said second device causes: To receive information related to uplink timing advance; and A second device that performs communication based on uplink and downlink settings related to the above uplink timing advance.

19. In the processing device, at least one processor; and At least one memory connected to said at least one processor and storing instructions, said instructions being executed by said at least one processor, wherein said second device causes: To receive information related to uplink timing advance; and A processing device that performs communication based on uplink and downlink settings related to the above uplink timing advance.

20. A non-transitory computer-readable storage medium that records commands, The above commands, when executed, cause the second device to: To receive information related to uplink timing advance; and A non-transitory computer-readable storage medium for performing communication based on uplink and downlink settings related to the above uplink timing advance.

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