Method and device for random access in non-terrestrial network

Abstract

A first device may acquire information related to a candidate random access resource set, the first device may acquire location information about the first device, and the first device may perform random access with a second device on the basis of information related to a random access resource set related to the location information among the information related to the candidate random access resource set.

Description

Method and device for random access in a non-terrestrial network

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

[0002] 5G NR is a successor technology to LTE (long term evolution) and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, ranging from low frequency bands below 1 GHz to mid-frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.

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

[0005] According to one embodiment of the present disclosure, a method may be provided. For example, the method may include at least one of: a first device acquiring information related to a set of candidate random access resources; a first device acquiring location information of the first device; and / or the first device performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[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 connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining information related to a set of candidate random access resources; obtaining location information of the first device; and / or performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[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 connected to the at least one processor and storing instructions. For example, the instructions may cause a first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining information related to a set of candidate random access resources; obtaining location information of the first device; and / or performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0008] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a first device to perform an operation based on execution. For example, the operation may include at least one of: obtaining information related to a set of candidate random access resources; obtaining location information of the first device; and / or performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0009] FIG. 1 illustrates a communication procedure between devices according to one embodiment of the present disclosure.

[0010] FIG. 2 shows a radio protocol architecture according to one embodiment of the present disclosure.

[0011] FIG. 3 shows the structure of a wireless frame according to one embodiment of the present disclosure.

[0012] FIG. 4 shows a slot structure of a frame according to one embodiment of the present disclosure.

[0013] FIG. 5 shows an example of a BWP according to one embodiment of the present disclosure.

[0014] FIG. 6 shows a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.

[0015] FIG. 7 illustrates an example of a communication scenario based on a 6G system according to an embodiment of the present disclosure.

[0016] FIGS. 8 and 9 illustrate a non-terrestrial network scenario according to one embodiment of the present disclosure.

[0017] FIG. 10 illustrates a procedure in which a first device and / or a second device perform random access according to one embodiment of the present disclosure.

[0018] FIG. 11 illustrates a procedure performed by a first device according to one embodiment of the present disclosure.

[0019] FIG. 12 illustrates a procedure performed by a second device according to one embodiment of the present disclosure.

[0020] FIG. 13 shows a communication system (1) according to one embodiment of the present disclosure.

[0021] FIG. 14 shows a wireless device according to one embodiment of the present disclosure.

[0022] FIG. 15 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0023] FIG. 16 shows a wireless device according to one embodiment of the present disclosure.

[0024] FIG. 17 shows a portable device according to one embodiment of the present disclosure.

[0025] In the present disclosure, "A or B" may mean "only A," "only B," or "both A and B." Alternatively, in the present disclosure, "A or B" may be interpreted as "A and / or B." For example, in the present disclosure, "A, B or C" may mean "only A," "only B," "only C," or "any combination of A, B and C."

[0026] A slash ( / ) or a comma used in the present disclosure 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."

[0027] 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 as synonymous with "at least one of A and B."

[0028] Additionally, in the present disclosure, "at least one of A, B and C" may 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" may mean "at least one of A, B and C."

[0029] 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, the "control information" of 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 (i.e., PDCCH)," "PDCCH" may be proposed as an example of "control information."

[0030] In the following explanation, 'when, if, in case of' can be replaced with 'based on'.

[0031] Technical features described individually within one drawing in this disclosure may be implemented individually or simultaneously.

[0032] In the present disclosure, a higher layer parameter may be a parameter that is set for the terminal, pre-set, or pre-defined. For example, a base station or a network may transmit the higher layer parameter to the terminal. For example, the higher layer parameter may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0033] In the present disclosure, "configured or defined" may be interpreted as being configured or pre-configured to a device through pre-defined signaling from a base station or network (e.g., SIB, MAC, RRC, DCI (downlink control information), etc.). In the present disclosure, "configured or defined" may be interpreted as being configured or pre-configured to a device through pre-defined signaling from another device (e.g., MAC, RRC, SCI (sidelink control information), control information signaled between devices, etc.). In the present disclosure, "configured or defined" may be interpreted as being pre-configured to a device.

[0034] In the present disclosure, 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.

[0035] The technology proposed in this 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.

[0036] The technology proposed in this disclosure can be implemented as 6G wireless technology and can be applied to various 6G systems. For example, 6G systems may have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0037] FIG. 1 illustrates a communication procedure between devices 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, suggestions, methods, and / or operations of the embodiments may be omitted.

[0038] Referring to FIG. 1, in step S101, the first device and the second device can perform synchronization. For example, the first device may be a terminal and / or at least one of the devices proposed in the present disclosure. For example, the second device may 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 may perform an initial cell search operation. For example, the first device may detect at least one synchronization signal transmitted according to a rule predefined by the second device. Here, for example, the synchronization signal may include a plurality of synchronization signals (e.g., primary synchronization signal, secondary synchronization signal, etc.) classified according to structure or use. 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., cell identifier).

[0039] In step S103, the first device may obtain system information transmitted by the second device. For example, the system information may include information related to the attributes, characteristics, and / or capabilities of the second device that are necessary 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 the system information prior to receiving the system information. For example, the request and provision of the system information may be performed after a random access procedure described later.

[0040] In step S105, the first device and the second device may perform a random access procedure. For example, the first device may transmit and / or receive at least one message for the random access procedure (e.g., random access preamble, random access response message, etc.) based on information related to the 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 may transmit a preamble (e.g., Msg1) through the random access channel, and the first device may receive a random access response message (e.g., Msg2). The first device may transmit a message (e.g., Msg3) containing 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 may receive a message (e.g., Msg4) for contention resolution and / or connection establishment. For example, Msg1 and Msg3 can be transmitted and received as a single message (e.g., MsgA), and / or Msg2 and Msg4 can be transmitted and received as a single message (e.g., MsgB).

[0041] 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 controlling the connection (e.g., a radio resource control (RRC) layer), a layer handling mapping between a logical channel and a transmission channel (e.g., a media access control (MAC) layer), and a layer handling a physical channel (e.g., a physical (PHY) layer). For example, the first device and the second device may perform at least one of signaling to establish a connection, signaling to determine settings related to communication, and / or signaling to indicate allocated resources. For example, the control information may be signaled / transmitted through 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.

[0042] 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 data based on signaling of control information and transmit and / or receive it. 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, antenna-specific waveform demodulation, signal placement considering layer mapping, constellation demapping, descrambling, and / or channel decoding.

[0043] For example, the layers of the radio interface protocol between the first device and the second device can be classified into L1 (layer 1), L2 (layer 2), L3 (layer 3), etc. For example, the physical layer belonging to layer 1 can provide an information transfer service using a physical channel, and the radio resource control (RRC) layer located at layer 3 can perform the role of controlling radio resources between the first device and the second device. To this end, for example, the RRC layer can exchange RRC messages between the first device and the second device.

[0044] FIG. 2 illustrates a radio protocol architecture according to one 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 said embodiment may be omitted. For example, FIG. 2(a) may represent a radio protocol stack in the user plane for uplink communication or downlink communication, and FIG. 2(b) may represent a radio protocol stack in the control plane for uplink communication or downlink communication. For example, FIG. 2(c) may represent a radio protocol stack in the user plane for device-to-device communication, and FIG. 2(d) may represent a radio protocol stack in the control plane for device-to-device communication.

[0045] For example, the physical layer can provide information transmission services to upper layers using a physical channel. For example, the physical layer can be connected to the upper layer, the MAC (medium access control) layer, through a transport channel. For example, data can be transmitted between the MAC layer and the physical layer through a transport channel. For example, transport channels can be classified according to how and with what characteristics data is transmitted through a wireless interface. For example, data can be transmitted through a physical channel between different physical layers, e.g., between the physical layers of a first device and a second device. For example, the physical channel can be modulated using the OFDM (orthogonal frequency division multiplexing) method, and time and frequency can be utilized as wireless resources.

[0046] For example, the MAC layer can provide services to the upper layer, the RLC (radio link control) layer, through logical channels. For example, the MAC layer can provide mapping functions from multiple logical channels to multiple transmission channels. For example, the MAC layer can provide logical channel multiplexing functions through mapping from multiple logical channels to a single transmission channel. For example, the MAC sublayer can provide data transmission services over logical channels.

[0047] For example, the RLC layer can perform concatenation, segmentation, and reassembly of RLC service data units (SDUs). For example, to guarantee various quality of service (QoS) required by a radio bearer (RB), the RLC layer can provide three modes of operation: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). For example, AM RLC can provide error correction through automatic repeat requests (ARQ).

[0048] For example, the RRC (radio resource control) layer may be defined only in the control plane. For example, the RRC layer may be responsible for controlling logical channels, transmission channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. For example, RB may refer to a logical path provided by the first layer (e.g., physical layer) and the second layer (e.g., MAC layer, RLC layer, PDCP (packet data convergence protocol) layer, SDAP (service data adaptation protocol) layer, etc.) for data transfer between a first device and a second device.

[0049] For example, the functions of the PDCP layer in the user plane may include the delivery of user data, header compression, and ciphering. For example, the functions of the PDCP layer in the control plane may include the delivery of control plane data and encryption / integrity protection.

[0050] For example, the establishment of an RB can mean the process of defining the characteristics of the wireless protocol layer and channel to provide specific services, and setting each specific parameter and method of operation. For example, an RB can be divided into two types: an SRB (signaling radio bearer) and a DRB (data radio bearer). For example, an SRB can be used as a channel to transmit RRC messages in the control plane, and a DRB can be used as a channel to transmit user data in the user plane.

[0051] For example, a downlink transmission channel may include at least one of a broadcast channel (BCH) that transmits system information and / or a shared channel (SCH) that transmits user traffic or control messages. For example, traffic or control messages for a downlink multicast or broadcast service may be transmitted via a downlink SCH or via a separate multicast channel (MCH). Meanwhile, an uplink transmission channel may include at least one of a random access channel (RACH) that transmits initial control messages and / or a shared channel (SCH) that transmits user traffic or control messages. For example, a logical channel located above the 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).

[0052] FIG. 3 shows the structure of a wireless frame according to one 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.

[0053] Referring to FIG. 3, radio frames may be used, for example, 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 contain 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 by subcarrier spacing (SCS). For example, each slot may contain 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

[0054] For example, when normal CP is used, each slot may contain 14 symbols. For example, when extended CP is used, each slot may contain 12 symbols. Here, for example, the symbols may include OFDM symbols (or CP-OFDM symbols) and SC-FDMA (single carrier-FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0055] Table 2 below shows the number of symbols per slot (N) according to 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) exemplifies.

[0056] CP Type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slot Normal CP 15kHz (u=0) 1410 130kHz (u=1) 1420 260kHz (u=2) 1440 4120kHz (u=3) 1480 8240kHz (u=4) 14160 16 Extended CP 60kHz (u=2) 1240 4

[0057] For example, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be configured differently among multiple cells merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., subframe, slot, or TTI (transmit time interval)) composed of the same number of symbols may be configured differently among the merged cells. For example, in the present disclosure, time resources such as subframes, slots, TTI, etc. may be referred to as time units.

[0058] For example, multiple numerologies or SCSs may be supported to support various services. For example, if the SCS is 15 kHz, a wide area in traditional cellular bands may be supported, and if the SCS is 30 kHz / 60 kHz, dense-urban, lower latency, and wider carrier bandwidth may be supported. For example, if the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.

[0059] FIG. 4 shows a slot structure of a frame according to one 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, suggestions, methods, and / or operations of the embodiments may be omitted.

[0060] 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 a single numerology (e.g., SCS, CP length, etc.). For example, a carrier may include up to N BWPs (where N is a positive integer). For example, data communication may be performed through an active BWP. For example, each element may be referred to as a resource element (RE) in a resource grid and may be mapped to a single complex symbol.

[0061] For example, a BWP can be a continuous set of PRBs in a given numerology. For example, a PRB can be selected from a continuous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0062] For example, the BWP may be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, the terminal may not monitor downlink radio link quality on DL BWPs other than the active DL BWP on the PCell (primary cell). For example, the terminal may not receive PDCCH (physical downlink control channel), PDSCH (physical downlink shared channel), or CSI-RS (channel state information-reference signal) (except for RRM (radio resource management)) outside of the active DL BWP. For example, the terminal may not trigger CSI (channel state information) reporting for inactive DL BWPs. For example, the terminal may not transmit PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel) outside of the active UL (uplink) BWP. For example, for the downlink, the initial BWP can be given as a consecutive set of resource blocks (RBs) for the remaining minimum system information (RMSI) CORESET (control resource set) (set by the physical broadcast channel (PBCH)). For example, for the uplink, 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 the upper layer. For example, the initial value of the default BWP can be the initial DL BWP.For energy saving, if the terminal fails to detect DCI (downlink control information) for a certain period, the terminal can switch the active BWP of the terminal to the default BWP.

[0063] 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.

[0064] Referring to FIG. 5, for example, a common resource block (CRB) may be a numbered carrier resource block from one end of the 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 the resource block grid.

[0065] For example, BWP is point A, offset from point A (N start BWP ) and bandwidth (N size BWP It can be set by ). For example, point A may be an external reference point of the PRB of a carrier where the subcarrier 0 of all numerologies (e.g., all numerologies supported by the network in that carrier) are aligned. For example, offset may be the PRB interval between the lowest subcarrier in a given numerology and point A. For example, bandwidth may be the number of PRBs in a given numerology.

[0066] FIG. 6 illustrates a communication structure that can be provided in a 6G system according to one 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 said embodiments may be omitted.

[0067] As core implementation technologies for 6G systems, technologies such as artificial intelligence (AI), THz (Terahertz) communication, optical wireless technology, free space optical transmission (FSO) backhaul networks, large-scale 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.

[0068] - Artificial Intelligence: Introducing AI into communications can streamline and enhance real-time data transmission. AI can determine how complex target tasks are performed using numerous analyses. For example, AI can increase efficiency and reduce processing latency. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communication. Furthermore, AI can enable rapid communication in Brain-Computer Interfaces (BCI). 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.

[0069] - THz Communication: Data transmission rates can be increased by expanding bandwidth. This can be achieved by using sub-THz communication with wide bandwidth and applying advanced large-scale MIMO technology. THz waves, also known as sub-millimeter radiation, generally refer to a frequency band between 0.1 THz and 10 THz with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz-300 GHz band range (Sub-THz band) is considered the primary portion of the THz band for cellular communication. Adding the Sub-THz band to the mmWave band increases 6G cellular communication capacity. Among the defined THz bands, the 300 GHz-3 THz band is located in the far-infrared (IR) frequency band. Although the 300 GHz-3 THz band is part of the optical band, it lies at the boundary of the optical band and immediately following the RF band. Therefore, this 300 GHz-3 THz band exhibits similarities to RF. Key characteristics of THz communication include (i) widely available bandwidth to support very high data transmission rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are indispensable). The narrow beam width generated by highly directional antennas reduces interference. The small wavelength of THz signals allows a much larger number of antenna elements to be integrated into devices and BSs operating in this band. This enables the use of advanced adaptive array technologies that can overcome range limitations.

[0070] - Large-scale MIMO technology

[0071] - Hologram beamforming (HBF)

[0072] - Optical wireless technology

[0073] - Free Space Optical Transmission Backhaul Network (FSO backhaul network)

[0074] - Quantum communication

[0075] - Cell-free communication

[0076] - Integration of wireless information and power transmission

[0077] - Integration of wireless communication and sensing

[0078] - Integrated access and backhaul network

[0079] - Big data analysis

[0080] - Reconfigurable intelligent metasurface

[0081] - Metaverse

[0082] - blockchain

[0083] - 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 may include UAM, RAM, UAS, and UAVs (uncrewed aerial vehicles).

[0084] - Autonomous driving (self-driving): V2X (vehicle to everything), a core element of building autonomous driving infrastructure, refers to technologies that enable vehicles to communicate and share with various elements on the road for autonomous driving, such as wireless communication between vehicles (vehicle to vehicle, V2V) and between vehicles and infrastructure (vehicle to infrastructure, V2I).

[0085] - Non-terrestrial Network (NTN): An NTN may refer to a network or network segment that utilizes RF (radio frequency) resources mounted on a satellite (or UAS platform). The use of NTN services may be considered to secure wider coverage or to provide wireless communication services in locations where the installation of wireless communication base stations is difficult.

[0086] - 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.

[0087] - Reconfigurable Intelligent Surface (RIS): An RIS can be used to manipulate and enhance signal propagation in a wireless communication environment. For example, an 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 instance, an RIS can improve signal reception by controlling the path, phase, and / or strength of the propagating signal. For instance, power consumption can be very low because power is consumed only for controlling the phase and amplitude of the small antennas. For instance, since an RIS can be reconfigured to suit various environments, it can meet diverse communication requirements and operate effectively in dynamic network environments.

[0088] 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.

[0089] Referring to FIG. 7, NTN communication can be performed based on a satellite network, HIBS (high-altitude platform stations (HAPS) as international mobile telecommunications (IMT) base stations (BS)), and an aeronautical communication-capable terminal (e.g., AAM). For example, to improve coverage, devices such as a satellite network, HIBS, and an aeronautical communication-capable terminal (e.g., AAM) 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.

[0090] FIGS. 8 and 9 illustrate a non-terrestrial network scenario according to one embodiment of the present disclosure. The embodiment of FIGS. 8 and 9 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiment may be omitted.

[0091] FIG. 8 illustrates a non-terrestrial network scenario based on a transparent payload, and FIG. 9 illustrates a non-terrestrial network scenario based on a regenerative payload. For example, a non-terrestrial network may generally include the following elements.

[0092] - One or more satellite gateways connecting non-terrestrial networks to public data networks

[0093] - Feeder link or wireless link between the satellite gateway and the satellite (or UAS platform)

[0094] - Service link or wireless link between user equipment and satellite (or UAS platform)

[0095] - A satellite (or UAS platform) capable of implementing transparent or regenerated (including onboard processing) payloads. For example, the satellite (or UAS platform) can generate multiple beams across a given service area, typically defined by a line of sight. For example, the beam footprint may typically be elliptical. For example, the line of sight of the satellite (or UAS platform) may vary depending on the onboard antenna diagram and the minimum elevation angle. For example, for a transparent payload, radio frequency filtering, frequency conversion, and amplification may be performed. Thus, the repeating waveform signal in the payload may not be altered. For example, for a regenerated payload, radio frequency filtering, frequency conversion, and amplification, as well as demodulation / decoding, switching and / or routing, and coding / modulation may be performed. This can effectively be equivalent to equipping the satellite (or UAS platform) with all base station functions.

[0096] - Optionally, Inter-Satellite Link (ISL)

[0097] - User equipment can be serviced by a satellite (or UAS platform) within the target service area.

[0098] Recently, active research has been conducted in the field of mobile communications on non-terrestrial (NTN) networks that utilize satellites, drones, and the like as network nodes. For example, satellites in NTN can be broadly classified into GSO satellites, which have a geosynchronous orbit (GSO), and NGSO satellites, which do not have a geosynchronous orbit (Non-GSO). Additionally, satellites can be classified into low earth orbit (LEO), medium earth orbit (MEO), and high earth orbit (HEO) depending on their altitude. In the field of mobile communications, LEO-based NTN support methods, which offer relatively lower costs and higher data transmission rates, are primarily being researched. Here, the aforementioned satellite-based non-terrestrial networks may possess channel characteristics such as large path attenuation and / or long time delay and / or large Doppler shift due to high altitude and / or high relative velocity.

[0099] Here, the satellite may provide service to airborne terminals and / or ground terminals through multiple satellite beams (e.g., beams or beam footprints), and the service area and / or radius of the satellite beams may be very wide compared to ground base stations. Therefore, the number of airborne terminals and / or ground terminals targeted by the satellite beams may be very large. Here, the initial access process in the mobile communication system may be based on a random access method. For example, the terminal(s) of the non-ground network may randomly select and / or transmit transmission resources within a mutually defined and / or configured set of resources between the base station (or network node) and / or the terminals. Here, the transmission resources may be in the form of a sequence and / or a (physical) channel for data transmission.

[0100] Here, since the non-terrestrial network must service a very large number of terminals per satellite beam, the random access method must be able to support the connection of a large number of terminals. In this regard, the present disclosure proposes a method and apparatus for supporting large-scale random access in a non-terrestrial network.

[0101] The proposed method(s) of the present disclosure are described below as examples of non-terrestrial networks, but the proposed method(s) of the present disclosure can be extended and applied to terrestrial networks as well.

[0102] FIG. 10 illustrates a procedure in which a first device and / or a second device perform random access according to one 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 said embodiment may be omitted. For convenience of explanation, the first device may be assumed to be a terminal, and the second device may be assumed to be a base station, a network, and / or a satellite. However, the proposed methods below are not limited thereto and may be applied to various devices.

[0103] Referring to FIG. 10, in step S1010, the first device may obtain information related to a random access (candidate) resource set. In step S1020, the first device may select and / or apply information related to the random access resource set. In step S1030, the first device may perform random access with the second device. Below, proposed method(s) for the random access are described in detail.

[0104] [Proposed Method #01] In a terrestrial and / or non-terrestrial network, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, the base station (or network node) may (pre)define and / or set information related to a set of random access (candidate) resources for each of a plurality of spatial layers (or spatial filters) (identifiers) for the terminal, and the terminal may select a spatial layer (or spatial filter) (identifier) ​​in one or more of the following ways.

[0105] (1) Configuration of base station (or network node) and / or selection of instruction-based spatial layer (or spatial filter) (identifier)

[0106] (2) The terminal randomly selects a spatial layer (or spatial filter) (identifier).

[0107] (3) Selection of a spatial layer (or spatial filter) based on transmission delay and / or elevation angle (identifier)

[0108] (4) (Relative) location-based spatial hierarchy (or spatial filter) (identifier) ​​selection

[0109] (5) Select an OAM (orbital angular momentum) mode-based spatial layer (or spatial filter) (identifier) ​​to transmit random access resources

[0110] For example, the terminal may transmit random access resources by applying information related to a set of random access (candidate) resources corresponding to the selected spatial layer (or spatial filter) (identifier). Here, for example, the base station (or network node) may (pre)define and / or set for the terminal whether to utilize the set of random access (candidate) resources for each spatial layer (or spatial filter) (identifier). Here, for example, when transmitting random access resources, the terminal may transmit a reference signal resource corresponding to the selected spatial layer (or spatial filter) (identifier) ​​together. For example, reference signal resources corresponding to different spatial layers (or spatial filters) (identifiers) may be designed as mutually orthogonal resources. Here, for example, the random access resources may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the (relative) location may refer to the (relative) location between the terminal and the base station (or network node). For example, the above (relative) position may mean (relative) distance and / or angle. Here, for example, the terminal may be a terminal capable of utilizing a navigation system. Here, for example, the navigation system may include a GNSS (global navigation satellite system) and / or a GPS (global positioning system), etc. Here, for example, the spatial layer (or spatial filter) (identifier) ​​may mean a (virtual) antenna port. Here, for example, the OAM (orbital angular momentum) mode may mean a specific transmission mode in an orbital angular momentum modulation scheme. For example, different OAM modes may be orthogonal to each other.

[0111] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0112] Here, for example, a non-ground network may consider a terminal with the capability to utilize a navigation system as a primary service target to effectively compensate for time offset (TO) and / or frequency offset (FO) caused by time delay and / or Doppler effects / transitions. Here, for example, the navigation system may include a global navigation satellite system (GNSS) and / or a global positioning system (GPS), etc. For example, the terminal may first determine its own location based on the navigation system information, then determine the location information of a service satellite based on the system information, etc., and then perform TO and / or FO (pre)compensation based on the location information.

[0113] Here, for example, in a non-terrestrial network, a next-generation satellite may support multi-antenna-based transmit and receive operations. For example, the multi-antenna may be configured in the form of a phased array antenna. Here, for example, to support random access for a large number of terminals, support for spatial multiplexing utilizing the multi-antenna reception of the satellite may be considered. Here, for example, the non-terrestrial network has a line of sight (LOS) characteristic, and therefore, it can be expected that channels will also be separated between terminals whose actual physical locations are significantly separated. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal supports the transmission of random access resources in a terrestrial and / or non-terrestrial network, the base station (or network node) may (pre)define and / or set information related to a set of random access (candidate) resources for a plurality of spatial layers (or spatial filters) (identifiers) for the terminal, and the terminal may select a spatial layer (or spatial filter) (identifier) ​​in one or more of the following ways.

[0114] (1) Configuration of base station (or network node) and / or selection of instruction-based spatial layer (or spatial filter) (identifier)

[0115] (2) The terminal randomly selects a spatial layer (or spatial filter) (identifier)

[0116] (3) Selection of a spatial layer (or spatial filter) based on transmission delay and / or elevation angle (identifier)

[0117] (4) (Relative) location-based spatial hierarchy (or spatial filter) (identifier) ​​selection

[0118] (5) Select an OAM (Orbital Angular Momentum) mode-based spatial layer (or spatial filter) (identifier) ​​to transmit random access resources

[0119] For example, the terminal can transmit random access resources by applying information related to a set of random access (candidate) resources corresponding to the selected spatial layer (or spatial filter) (identifier).

[0120] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, a spatial multiplexing technique based on the utilization capability of a terminal's navigation system during the transmission of random access resources can be supported. Through this, random access resources can be effectively increased, and an increase in the probability of random access success and / or a reduction in connection time delay can be achieved.

[0121] The above [Proposed Plan #01] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0122] [Proposed Method #02] In terrestrial and / or non-terrestrial networks, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, when a terminal transmits a random access resource along with an associated reference signal, the terminal may select and / or transmit the reference signal resource in one or more of the following ways.

[0123] (1) Selection of reference signal resources based on the configuration and / or instructions of the base station (or network node)

[0124] (2) The terminal selects a reference signal resource arbitrarily or randomly

[0125] (3) Selection of reference signal resources based on transmission delay and / or elevation angle

[0126] (4) (Relative) position-based reference signal resource selection

[0127] (5) Selection of reference signal resources based on OAM (orbital angular momentum) mode to transmit random access resources

[0128] (6) Selection based on allocation information of some resources (e.g., sequences) among random access resources

[0129] Here, for example, the base station (or network node) may (pre)define and / or set which of the above methods to apply to the terminal. Here, for example, the terminal may select one or more resources from a plurality of orthogonal resources as reference signal resources. Here, for example, the random access resource may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the (relative) location may refer to the (relative) location between the terminal and the base station (or network node). For example, the (relative) location may refer to a (relative) distance and / or angle. Here, for example, the terminal may be a terminal capable of utilizing a navigation system. Here, for example, the navigation system may include a GNSS (global navigation satellite system) and / or a GPS (global positioning system), etc. Here, for example, the OAM (orbital angular momentum) mode may refer to a specific transmission mode in an orbital angular momentum modulation scheme. For example, different OAM modes can be orthogonal to each other.

[0130] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0131] Here, for example, a non-ground network may consider a terminal with the capability to utilize a navigation system as a primary service target to effectively compensate for time offset (TO) and / or frequency offset (FO) caused by time delay and / or Doppler effects / transitions. Here, for example, the navigation system may include a global navigation satellite system (GNSS) and / or a global positioning system (GPS), etc. For example, the terminal may first determine its own location based on the navigation system information, then determine the location information of a service satellite based on the system information, etc., and then perform TO and / or FO (pre)compensation based on the location information.

[0132] Here, for example, in a non-terrestrial network, next-generation satellites can support multi-antenna-based transmit and receive operations. For example, the multi-antennas can be configured in the form of phased array antennas. Here, for example, to support random access for a large number of terminals, support for spatial multiplexing utilizing the satellite's multi-antenna reception can be considered. Here, for example, non-terrestrial networks have line of sight (LOS) characteristics, and therefore, it can be expected that channels will also be separated between terminals whose actual physical locations are significantly distinct. Here, for example, to support the multi-user multiple input multiple output (MU-MIMO) technique for the location information-based uplink, channels between each spatial layer need to be separated. Here, for example, when transmitting a reference signal within a random access resource, the reference signal needs to be transmitted so that it is separated by spatial layer. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal in a terrestrial and / or non-terrestrial network supports the transmission of a random access resource, when the terminal transmits the random access resource along with an associated reference signal, the terminal may select and / or transmit the reference signal resource in one or more of the following ways.

[0133] (1) Selection of reference signal resources based on the configuration and / or instructions of the base station (or network node)

[0134] (2) The terminal selects a reference signal resource arbitrarily or randomly

[0135] (3) Selection of reference signal resources based on transmission delay and / or elevation angle

[0136] (4) (Relative) position-based reference signal resource selection

[0137] (5) Selection of reference signal resources based on OAM (orbital angular momentum) mode to transmit random access resources

[0138] (6) Selection based on allocation information of some resources (e.g., sequences) among random access resources

[0139] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, a spatial multiplexing technique based on the utilization capability of a terminal's navigation system during the transmission of random access resources can be supported. Through this, random access resources can be effectively increased, and an increase in the probability of random access success and / or a reduction in connection time delay can be achieved.

[0140] The above [Proposed Plan #02] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0141] [Proposed Method #03] In a terrestrial and / or non-terrestrial network, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, the random access resources may consist of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and the terminal may (repeatedly) transmit the first signal and / or the second signal, and the number of (repeated) transmissions may be determined by one or more of the following methods.

[0142] (1) Determination of the configuration and / or instructions of the base station (or network node)

[0143] (2) The terminal decides arbitrarily or randomly

[0144] (3) The terminal makes a decision based on specific conditions and / or information

[0145] A. For example, a determination based on transmission resource allocation information of a first signal or a second signal

[0146] B. For example, a decision based on congestion information (within system information).

[0147] C. For example, determination based on the number of random access attempts

[0148] D. For example, decisions based on channel measurement results

[0149] E. For example, decisions based on (relative) location information

[0150] F. For example, decisions based on sensing information

[0151] G. For example, a decision based on transmission power information

[0152] Here, for example, the base station (or network node) may (pre)define and / or set whether the (repeated) transmission is performed to the terminal. Here, for example, the random access resource may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the (relative) location may refer to the (relative) location between the terminal and the base station (or network node). For example, the (relative) location may refer to a (relative) distance and / or angle. Here, for example, the terminal may be a terminal capable of utilizing a navigation system. Here, for example, the navigation system may include a GNSS (global navigation satellite system) and / or a GPS (global positioning system), etc. Here, for example, the channel measurement result may include RSRP (reference signal received power), etc. Here, for example, when the terminal attempts random access again, it may first attempt to increase the transmit power for the random access resource and then attempt to increase the number of (repeated) transmissions for the random access resource. For example, an increase in the number of (repeated) transmissions may be attempted additionally when the increase in transmission power for a random access resource reaches an upper limit. Here, for example, the base station (or network node) may (pre)define and / or set information on the maximum and / or minimum number of (repeated) transmissions to the terminal. Here, for example, the terminal may transmit, including allocation information for the entire and / or previous and / or subsequent (repeated) transmission resources per (repeated) transmission. Here, for example, the terminal may (additionally) transmit a reference signal for detection at the base station (or network node) per (repeated) transmission.For example, the sequence information of the above reference signal may be (pre)defined and / or set with a base station (or network node) and may be a sequence commonly used for a cell and / or terminal group.

[0153] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0154] Here, for example, a non-terrestrial network may avoid collisions by (repeatedly) transmitting random access resources to different resources to support large-scale random access, and utilize the detected resource to cancel and / or remove the previous (repeated) transmission. Here, for example, the signal cancellation and / or removal technique may follow the successive interference cancellation (SIC) technique. Here, for example, the (repeated) transmission and / or SIC-based random access method has the advantage of increasing the success probability when there are many terminals to connect, whereas it may have the disadvantage of increasing connection time and / or complexity and consuming resources and power. Therefore, it may be desirable to adaptively operate the (repeated) transmission and / or SIC-based random access method in situations where it is determined that there are many connected terminals. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal in a terrestrial and / or non-terrestrial network supports the transmission of a random access resource, the random access resource may be composed of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and the terminal may (repeatedly) transmit the first signal and / or the second signal, and the number of (repeated) transmissions may be determined by one or more of the following methods.

[0155] (1) Determination of the configuration and / or instructions of the base station (or network node)

[0156] (2) The terminal decides arbitrarily or randomly

[0157] (3) The terminal makes a decision based on specific conditions and / or information

[0158] A. For example, a determination based on transmission resource allocation information of a first signal or a second signal

[0159] B. For example, a decision based on congestion information (within system information).

[0160] C. For example, determination based on the number of random access attempts

[0161] D. For example, decisions based on channel measurement results

[0162] E. For example, decisions based on (relative) location information

[0163] F. For example, decisions based on sensing information

[0164] G. For example, a decision based on transmission power information

[0165] For example, when the terminal attempts random access for the first time, it may not apply a type in which the random access resource is repeatedly transmitted for faster access. For example, the terminal may apply a type in which the random access resource is repeatedly transmitted when attempting a random access again after a previous attempt failed. For example, the number of repeated transmissions of the random access resource may increase in proportion to the number of random access attempts. Here, for example, when the terminal attempts random access again, it may first attempt to increase the transmission power for the random access resource and then attempt to increase the number of (repeated) transmissions for the random access resource. For example, an additional attempt to increase the number of (repeated) transmissions may be made when the increase in transmission power for the random access resource reaches an upper limit. Here, for example, the terminal may (additionally) transmit a reference signal for detection at the base station (or network node) for each (repeated) transmission. For example, the sequence information of the reference signal may be (pre)defined and / or set with the base station (or network node) and may be a sequence that is typically used commonly for a cell and / or terminal group. Here, for example, the reference signal may be a device for a base station (or network node) to facilitate the detection of (repeated) transmissions of a terminal. Alternatively, for example, the base station (or network node) may set / instruct the number of (repeated) times for the random access resource for all terminals or per terminal.

[0166] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, when supporting the (repeated) transmission and / or SIC-based random access method, this can be utilized in a timely manner based on information such as the congestion level of the wireless channel. Through this, an increase in the probability of random access success and / or a reduction in connection time delay can be achieved at a low cost.

[0167] The above [Proposed Plan #03] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0168] [Proposed Method #04] In a terrestrial and / or non-terrestrial network, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, the random access resource may be composed of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and the terminal may (repeatedly) transmit the first signal and / or the second signal, and one or more of the following settings and / or information may be differentially selected and / or applied according to the number of (repeated) transmissions and / or the order / sequence of the (repeated) transmissions and / or the (sub) resource set to which the (repeated) transmission belongs.

[0169] (1) A set of candidate resources for random access resources (e.g., distinguishing between a single-transmission type and a repeat-transmission type)

[0170] (2) Method of allocating transmission resources for random access resources

[0171] (3) Signal / channel configuration method for random access resources

[0172] (4) Transmission power for random access resources

[0173] Here, for example, the base station (or network node) may (pre)define and / or set whether the differential settings and / or information are applied to the terminal. Here, for example, the random access resource may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the (sub) resource set(s) to which the (repeated) transmission may belong may refer to (sub) resource set(s) distinguished in a physical resource area, and may be (pre)defined and / or set and / or directed by the base station (or network node).

[0174] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0175] Here, for example, a non-terrestrial network may avoid collisions by (repeatedly) transmitting random access resources to different resources to support large-scale random access, and utilize the detected resource to cancel and / or remove the previous (repeated) transmission. Here, for example, the signal cancellation and / or removal technique may follow the successive interference cancellation (SIC) technique. Here, for example, while the (repeated) transmission and / or SIC-based random access method has the advantage of increasing the success probability when there are many terminals to connect, it may have the disadvantage of increasing connection time and / or complexity and consuming resources and power. Therefore, the number of (repeated) transmissions of the random access resource may be applied differently for each terminal depending on the situation. Here, for example, the coexistence of terminals with different (repeated) transmission counts of the random access resource may need to be considered. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal in a terrestrial and / or non-terrestrial network supports random access resource transmission, the random access resource may be composed of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and the terminal may (repeatedly) transmit the first signal and / or the second signal, and one or more of the following settings and / or information may be differentially selected and / or applied according to the number of (repeated) transmissions and / or the order / sequence of the (repeated) transmissions and / or the (sub) resource set to which the (repeated) transmission belongs.

[0176] (1) A set of candidate resources for random access resources (e.g., distinguishing between a single-transmission type and a repeat-transmission type)

[0177] (2) Method of allocating transmission resources for random access resources

[0178] (3) Signal / channel configuration method for random access resources

[0179] (4) Transmission power for random access resources

[0180] For example, there may exist a type that transmits (single) without (repeating) transmitting part and / or all of the random access resources (hereinafter Type 1) and a type that transmits (repeating) part and / or all of the random access resources (hereinafter Type 2). For example, the resource set for Type 1 and the resource set for Type 2 may be (pre)defined and / or set so as to be separated from each other. Or, for example, the resource set for Type 1 and the resource set for Type 2 may share part and / or all of the resources. Here, Type 1 may be vulnerable to collisions compared to Type 2, which performs (repeating) transmission. Therefore, for example, when transmitting Type 2 random access resources, the first resource allocation method may be applied within the resource set shared by Type 1 and Type 2, and the second resource allocation method may be applied within the resource set used only by Type 2. For example, the first resource allocation method may be a method of determining a (physical) channel resource for data transmission in conjunction with a sequence resource among random access resources. In this case, for example, collisions may be avoided when separating sequences. For example, the second resource allocation method may be a method in which the terminal determines a (physical) channel resource for data transmission arbitrarily or randomly. For example, when the terminal transmits a random access resource (repeatedly), the terminal may apply a single resource allocation method to the entire (repeatedly) transmission resource or apply different resource allocation methods for each resource (group) within the entire (repeatedly) transmission resource. For example, the initial or some (repeatedly) transmission resource may be determined according to the first resource allocation method, and other some (repeatedly) transmission resource may be determined according to the second resource allocation method.

[0181] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, when supporting the (repeated) transmission and / or SIC-based random access method, appropriate random access resource settings can be applied and / or supported according to the number and / or order of (repeated) transmissions. Through this, an increase in the probability of random access success and / or a reduction in connection time delay can be achieved.

[0182] The above [Proposed Plan #04] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0183] [Proposed Method #05] In a terrestrial and / or non-terrestrial network, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, the random access resources may consist of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and the terminal may (repeatedly) transmit the first signal and / or the second signal, and some resources (sets) and / or all resources (sets) and / or candidate resources (sets) for the (repeatedly) transmitted resources may be determined by one or more of the following methods.

[0184] (1) Determination of the configuration and / or instructions of the base station (or network node)

[0185] (2) The terminal decides arbitrarily or randomly

[0186] (3) Determination based on (repeated) transmission resource allocation information of another signal (first signal or second signal)

[0187] (4) Determination based on the preceding (repeated) transmission resource allocation information of the same signal (first signal or second signal)

[0188] (5) Decision based on sensing information

[0189] Here, for example, the base station (or network node) may (pre)define and / or set which of the above methods to apply to the terminal. Here, for example, the random access resource may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the candidate resource (set) may consist of (orthogonal) resources distinguished in the time and / or frequency and / or code and / or spatial domains.

[0190] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0191] Here, for example, a non-terrestrial network may avoid collisions by (repeatedly) transmitting random access resources to different resources to support large-scale random access, and utilize the detected resource to cancel and / or remove the previous (repeated) transmission. Here, for example, the signal cancellation and / or removal technique may follow the successive interference cancellation (SIC) technique. Here, for example, when the random access resource includes a (physical) channel for data transmission, a method for determining the (repeated) transmission resource for the (physical) channel for data transmission needs to be defined. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal in a terrestrial and / or non-terrestrial network supports random access resource transmission, the random access resource may be composed of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and the terminal may (repeatedly) transmit the first signal and / or the second signal, and some resources (set) and / or all resources (set) and / or candidate resources (set) for the (repeatedly) transmitted resources may be determined by one or more of the following methods.

[0192] (1) Determination of the configuration and / or instructions of the base station (or network node)

[0193] (2) The terminal decides arbitrarily or randomly

[0194] (3) Determination based on (repeated) transmission resource allocation information of another signal (first signal or second signal)

[0195] (4) Determination based on the preceding (repeated) transmission resource allocation information of the same signal (first signal or second signal)

[0196] (5) Decision based on sensing information

[0197] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, when supporting the (repeated) transmission and / or SIC-based random access method, randomness and / or randomness can still be supported when determining the (repeated) transmission resource, thereby reducing the probability of resource collision. Furthermore, by indicating the candidate resource area where the said randomness and / or randomness is allowed through other signals within the random access resource, the detection burden at the base station (or network node) can be reduced.

[0198] The above [Proposed Plan #05] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0199] [Proposed Method #06] In terrestrial and / or non-terrestrial networks, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, the base station (or network node) may (pre)define and / or set and / or instruct the terminal to set (total) N candidate transmission resources for the transmission of random access resources, and the terminal may select resources step-by-step as follows when performing (total) M (repetitive) transmissions.

[0200] (1) Step 1: Selecting M candidate transmission resource sets from N candidate transmission resource sets

[0201] For example, the terminal may randomly select M candidate transmission resource sets from (total) N candidate transmission resource sets. For example, the terminal may randomly select one candidate transmission resource set from (total) N candidate transmission resource sets and then select a series of M-1 candidate transmission resource sets (in order).

[0202] (2) Step 2: A step of mapping M (repeated) transmissions to a set of M candidate transmission resources.

[0203] For example, the terminal can map the m-th (e.g., m=0, 1, ..., M-1) (repeated) transmission to the m-th (e.g., m=0, 1, ..., M-1) candidate transmission resource set within the selected set of M candidate transmission resources.

[0204] (3) Step 3: Selecting a single and / or multiple transmission resources for a specific (repeated) transmission from a set of corresponding candidate transmission resources.

[0205] For example, the terminal may randomly or arbitrarily select a single and / or multiple transmission resources from among the resources in the set of candidate transmission resources corresponding to the (corresponding) repeated transmission.

[0206] Here, for example, the base station (or network node) may (pre)define and / or set whether to apply the stepwise resource selection method to the terminal. Here, for example, the random access resource may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the correspondence between the M (repeated) transmissions and the M candidate transmission resource sets may be (pre)defined and / or set and / or instructed by the base station (or network node) to the terminal. Here, for example, the order between resource sets within the selected M candidate transmission resource sets may follow a chronological order. Here, for example, the candidate transmission resource sets may be configured to have a certain time interval between each other. For example, when transmitting random access resources across multiple slots for purposes such as coverage improvement, the time interval between the candidate transmission resource sets may be made sufficiently large to prevent random access resources from spanning one or more candidate transmission resource sets. Here, for example, when there is one or more transmission resources for the specific (repeated) transmission, the same data may be repeatedly transmitted to multiple transmission resources, or multiple parts of a single data may be transmitted across multiple transmission resources.

[0207] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0208] Here, for example, a non-terrestrial network may avoid collisions by (repeatedly) transmitting random access resources to different resources to support large-scale random access, and utilize the detected resource to cancel and / or remove the previous (repeated) transmission. Here, for example, the signal cancellation and / or removal technique may follow the successive interference cancellation (SIC) technique. Here, for example, while the (repeated) transmission and / or SIC-based random access method has the advantage of increasing the success probability when there are many terminals to connect, it may have the disadvantage of increasing connection time and / or complexity and consuming resources and power. Therefore, the number of (repeated) transmissions of the random access resource may be applied differently for each terminal depending on the situation. Here, for example, the coexistence of terminals with different (repeated) transmission counts of the random access resource may need to be considered. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal in a terrestrial and / or non-terrestrial network supports random access resource transmission, the base station (or network node) may (pre)define and / or set and / or instruct the terminal to (pre)define and / or set and / or instruct a (total) set of N candidate transmission resources for random access resource transmission, and the terminal may select resources stepwise as follows when performing (total) M (repeated) transmissions.

[0209] (1) Step 1: Selecting M candidate transmission resource sets from N candidate transmission resource sets

[0210] For example, the terminal may randomly select M candidate transmission resource sets from (total) N candidate transmission resource sets. For example, the terminal may randomly select one candidate transmission resource set from (total) N candidate transmission resource sets and then select a series of M-1 candidate transmission resource sets (in order).

[0211] (2) Step 2: A step of mapping M (repeated) transmissions to a set of M candidate transmission resources.

[0212] For example, the terminal can map the m-th (e.g., m=0, 1, ..., M-1) (repeated) transmission to the m-th (e.g., m=0, 1, ..., M-1) candidate transmission resource set within the selected set of M candidate transmission resources.

[0213] (3) Step 3: Selecting a single and / or multiple transmission resources for a specific (repeated) transmission from a set of corresponding candidate transmission resources.

[0214] For example, the terminal may randomly or arbitrarily select a single and / or multiple transmission resources from among the resources in the set of candidate transmission resources corresponding to the (corresponding) repeated transmission.

[0215] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, when supporting the (repeated) transmission and / or SIC-based random access method, it is possible to overcome the limitation where performance is constrained due to transmission resources being concentrated within a specific resource area when terminals with different (repeated) transmission counts select transmission resources. Through this, an increase in the probability of random access success and / or a reduction in connection time delay can be achieved.

[0216] The above [Proposed Plan #06] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0217] [Proposed Method #07] In a terrestrial and / or non-terrestrial network, a base station (or network node) and / or a terminal may support the transmission of random access resources. In this case, for example, the random access resources may consist of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and when the terminal (repeatedly) transmits the first signal and / or the second signal, it may divide some and / or all of the (repeatedly) transmitted resources into multiple distinct OAM (orbital angular momentum) modes for transmission (e.g., OAM mode-based multiplexing transmission). Here, for example, the base station (or network node) may (pre)define and / or set whether to apply the OAM mode-based multiplexing transmission method to the terminal. Here, for example, the random access resources may be in the form of a sequence and / or a (physical) channel for data transmission. Here, for example, the above candidate resources (set) may consist of (orthogonal) resources distinguished in the time and / or frequency and / or code and / or spatial domains. Here, for example, the above OAM (orbital angular momentum) mode may refer to a specific transmission mode in an orbital angular momentum modulation scheme. For example, different OAM modes may be orthogonal to each other.

[0218] For example, in a non-terrestrial network according to one embodiment of the present disclosure, let us assume that a base station (or network) can service ground and / or air terminals based on the non-terrestrial network. For example, in the non-terrestrial network, the base station (or network) can support downlink and / or uplink transmission to ground and / or air terminals via a satellite. Here, the downlink and / or uplink channels of the non-terrestrial network may experience significant time delay and / or Doppler effects / transitions due to the high altitude and / or high mobility of the satellite. Here, due to the high altitude characteristics of the non-terrestrial network, the number of terminals to be served within each satellite beam may be very large, and the network must be able to support large-scale random access.

[0219] Here, for example, a non-terrestrial network may avoid collisions by (repeatedly) transmitting random access resources to different resources to support large-scale random access, and utilize the detected resources to cancel and / or remove previous (repeated) transmissions. Here, for example, the signal cancellation and / or removal technique may follow the successive interference cancellation (SIC) technique. Here, for example, the (repeated) transmission and / or SIC-based random access method has the advantage of increasing the success probability when there are many terminals to connect, but it may have the disadvantage of increasing connection time and / or complexity and consuming resources / power. Here, for example, if line of sight (LOS) channel characteristics are utilized, spatial multiplexing can be supported by utilizing an orbital angular momentum (OAM)-based modulation method. Accordingly, in the present disclosure, when a base station (or network node) and / or a terminal in a terrestrial and / or non-terrestrial network supports random access resource transmission, the random access resource may be composed of a sequence (hereinafter referred to as the first signal) and / or a (physical) channel for data transmission (hereinafter referred to as the second signal), and when the terminal transmits the first signal and / or the second signal (repeatedly), it may divide some and / or all of the (repeatedly) transmitted resources into multiple distinct OAM (orbital angular momentum) modes for transmission (OAM mode-based multiplexing transmission).

[0220] According to the proposed method of the present disclosure, there is an advantage in that large-scale random access can be supported in terrestrial and / or non-terrestrial networks. For example, when supporting the (repeated) transmission and / or SIC-based random access method, time delay can be reduced by transmitting (repeated) transmission resources in the spatial domain. Through this, an increase in the probability of random access success and / or a reduction in connection time delay can be achieved.

[0221] The above [Proposed Plan #07] may be applied in combination with other proposed plans within the scope where the proposed operations do not conflict.

[0222] FIG. 11 illustrates a procedure performed by a first device according to one 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, suggestions, methods, and / or operations of said embodiments may be omitted.

[0223] Referring to FIG. 11, in step S1110, the first device can obtain information related to a set of candidate random access resources. In step S1120, the first device can obtain location information of the first device. In step S1130, the first device can perform random access with the second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0224] For example, the above position information may include at least one of relative position information between the first device and the second device, distance information between the first device and the second device, or angle information between the first device and the second device.

[0225] For example, the random access may be performed based on information related to the random access resource set associated with at least one of the transmission delay or elevation angle among the information related to the candidate random access resource set.

[0226] For example, the random access may be performed based on information related to the random access resource set associated with the orbital angular momentum mode used for the random access among the information related to the candidate random access resource set.

[0227] For example, a resource for a reference signal associated with the above random access can be randomly selected by the first device.

[0228] For example, a resource for a reference signal related to the random access may be selected by the first device based on allocation information of some of the resources for the random access.

[0229] For example, a resource for a reference signal associated with the random access may be selected by the first device based on at least one of the position information, elevation angle, transmission delay, or orbital angular momentum mode used for the random access.

[0230] For example, the random access may be performed based on a transmission including at least one of a sequence or a data channel.

[0231] For example, information related to the set of candidate random access resources may include information related to a first type of candidate random access resource set and information related to a second type of candidate random access resource set. For example, information related to the set of candidate random access resources of the first type may be information related to a set of candidate random access resources for single transmission-based random access, and information related to the set of candidate random access resources of the second type may be information related to a set of candidate random access resources for iterative transmission-based random access. For example, the method of determining resources within the set of candidate random access resources of the first type may differ from the method of determining resources within the set of candidate random access resources of the second type. For example, resources within the set of candidate random access resources of the first type may be determined by the first device based on a random access-related sequence, and resources within the set of candidate random access resources of the second type may be determined randomly by the first device.

[0232] For example, the first device may be a terminal, and the second device may be a base station, a network node, or a satellite.

[0233] The proposed method above may be applied to a device according to various embodiments of the present disclosure. For example, a processor (102) of a first device (100) may obtain information related to a set of candidate random access resources, and / or the processor (102) of the first device (100) may obtain location information of the first device, and / or the processor (102) of the first device (100) may perform random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0234] 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 connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining information related to a set of candidate random access resources; obtaining location information of the first device; and / or performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0235] 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 connected to the at least one processor and storing instructions. For example, the instructions may cause a first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining information related to a set of candidate random access resources; obtaining location information of the first device; and / or performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0236] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a first device to perform an operation based on execution. For example, the operation may include at least one of: obtaining information related to a set of candidate random access resources; obtaining location information of the first device; and / or performing random access with a second device based on information related to a set of random access resources related to the location information among the information related to the set of candidate random access resources.

[0237] FIG. 12 illustrates a procedure performed by a second device 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, suggestions, methods, and / or operations of said embodiments may be omitted.

[0238] Referring to FIG. 12, in step S1210, the second device may transmit information related to a set of candidate random access resources to the first device. In step S1220, the second device may perform random access with the first device based on information related to a set of random access resources related to the location information of the first device among the information related to the set of candidate random access resources.

[0239] For example, the above position information may include at least one of relative position information between the first device and the second device, distance information between the first device and the second device, or angle information between the first device and the second device.

[0240] For example, the random access may be performed based on information related to the random access resource set associated with at least one of the transmission delay or elevation angle among the information related to the candidate random access resource set.

[0241] For example, the random access may be performed based on information related to the random access resource set associated with the orbital angular momentum mode used for the random access among the information related to the candidate random access resource set.

[0242] For example, a resource for a reference signal associated with the above random access can be randomly selected by the first device.

[0243] For example, a resource for a reference signal related to the random access may be selected by the first device based on allocation information of some of the resources for the random access.

[0244] For example, a resource for a reference signal associated with the random access may be selected by the first device based on at least one of the position information, elevation angle, transmission delay, or orbital angular momentum mode used for the random access.

[0245] For example, the random access may be performed based on a transmission including at least one of a sequence or a data channel.

[0246] For example, information related to the set of candidate random access resources may include information related to a first type of candidate random access resource set and information related to a second type of candidate random access resource set. For example, information related to the set of candidate random access resources of the first type may be information related to a set of candidate random access resources for single transmission-based random access, and information related to the set of candidate random access resources of the second type may be information related to a set of candidate random access resources for iterative transmission-based random access. For example, the method of determining resources within the set of candidate random access resources of the first type may differ from the method of determining resources within the set of candidate random access resources of the second type. For example, resources within the set of candidate random access resources of the first type may be determined by the first device based on a random access-related sequence, and resources within the set of candidate random access resources of the second type may be determined randomly by the first device.

[0247] For example, the first device may be a terminal, and the second device may be a base station, a network node, or a satellite.

[0248] The proposed method above may be applied to a device according to various embodiments of the present disclosure. For example, a processor (202) of a second device (200) may control a transceiver (206) to transmit information related to a set of candidate random access resources to a first device, and / or the processor (202) of the second device (200) may perform random access with the first device based on information related to a set of random access resources related to location information of the first device among the information related to the set of candidate random access resources.

[0249] 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 connected to the at least one processor and storing instructions. For example, the instructions may cause the second device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: transmitting information related to a set of candidate random access resources to the first device; and / or performing random access with the first device based on information related to a set of random access resources related to the location information of the first device among the information related to the set of candidate random access resources.

[0250] 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 connected to the at least one processor and storing instructions. For example, the instructions may cause a second device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: transmitting information related to a set of candidate random access resources to a first device; and / or performing random access with the first device based on information related to a set of random access resources related to location information of the first device among the information related to the set of candidate random access resources.

[0251] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a second device to perform an operation based on execution. For example, the operation may include at least one of: transmitting information related to a set of candidate random access resources to a first device; and / or performing random access with the first device based on information related to a set of random access resources related to location information of the first device among the information related to the set of candidate random access resources.

[0252] Various embodiments of the present disclosure may be combined with one another, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0253] The following describes an apparatus to which various embodiments of the present disclosure may be applied.

[0254] Although not limited to this, the various descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0255] Examples are provided in more detail below with reference to the drawings. In the following drawings and descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or function blocks unless otherwise described.

[0256] FIG. 13 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment of FIG. 13 can be combined with various embodiments of the present disclosure.

[0257] Referring to FIG. 13, 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 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 Thing) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with wireless communication functions, an autonomous vehicle, a vehicle capable of performing inter-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., Advanced Air Mobility). The XR device includes an Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) device and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a computer (e.g., a laptop, 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 be implemented as a wireless device, and a specific wireless device (200a) may operate as a base station / network node to other wireless devices.

[0258] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. For example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in 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 names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0259] Wireless devices (100a to 100f) can be connected to a network (300) through a base station (200). Artificial Intelligence (AI) technology may be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) through the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices (100a to 100f) may communicate with each other through the base station (200) / network (300), but they may 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). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0260] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base station (200) and base station (200) / base station (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 inter-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 / from each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various proposals of the present disclosure, at least some of the following may be performed: various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc.

[0261] FIG. 14 shows a wireless device according to one embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

[0262] Referring to FIG. 14, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} may correspond to {wireless device (100x), base station (200)} and / or {wireless device (100x), wireless device (100x)} of FIG. 13.

[0263] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or flowcharts of operation disclosed in this document. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0264] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). Memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeable with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0265] Hereinafter, 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 Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation 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 flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document.

[0266] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or 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 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. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be contained in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0267] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0268] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may 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 connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document through 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 the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0269] FIG. 15 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure. The embodiment of FIG. 15 can be combined with various embodiments of the present disclosure.

[0270] Referring to FIG. 15, 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 operation / function of FIG. 15 may be performed in the processor (102, 202) and / or transceiver (106, 206) of FIG. 14. The hardware elements of FIG. 15 may be implemented in the processor (102, 202) and / or transceiver (106, 206) of FIG. 14. For example, blocks 1010 through 1060 may be implemented in the processor (102, 202) of FIG. 14. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 14, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 14.

[0271] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 15. Here, the codeword is an encoded bit sequence of an information block. The information block may include a transmission block (e.g., UL-SCH transmission block, DL-SCH transmission block). The wireless signal can be transmitted through various physical channels (e.g., PUSCH, PDSCH).

[0272] Specifically, a codeword can be converted into a scrambled bit sequence by a scrambler (1010). The scrambled sequence used for scrambling is generated based on an initialization value, which may include ID information of a 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 an N*M precoding matrix W. 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 the complex modulation symbols. Additionally, the precoder (1040) can perform precoding without performing transform precoding.

[0273] A resource mapper (1050) can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. A signal generator (1060) generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to another device through each antenna. To this end, the signal generator (1060) may include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0274] The signal processing process for a received signal in a wireless device can be configured as the inverse of the signal processing process (1010–1060) of FIG. 15. For example, a wireless device (e.g., 100, 200 in FIG. 14) can receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal can be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Subsequently, the baseband signal can be restored into a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scrambling process. The codeword can be restored into the original information block 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.

[0275] FIG. 16 illustrates a wireless device according to one embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use-example / service (see FIG. 13). The embodiment of FIG. 16 may be combined with various embodiments of the present disclosure.

[0276] Referring to FIG. 16, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 14 and may be composed of various elements, components, units / parts, 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 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. 14. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 14. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and additional elements (140) and controls the general operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on a program / code / command / information stored in the memory unit (130). Additionally, the control unit (120) may transmit information stored in the memory unit (130) to an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110) in the memory unit (130).

[0277] The additional element (140) can be configured in various ways depending on the type of 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. 13, 100a), a vehicle (Fig. 13, 100b-1, 100b-2), an XR device (Fig. 13, 100c), a portable device (Fig. 13, 100d), a home appliance (Fig. 13, 100e), an IoT device (Fig. 13, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (Fig. 13, 400), a base station (Fig. 13, 200), a network node, etc. Wireless devices can be used in a movable or fixed location depending on the use—e.g., service.

[0278] In FIG. 16, 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 partially 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 connected via a wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly via the communication unit (110). Additionally, each element, component, unit / part, and / or module within the wireless device (100, 200) may include one or more additional elements. For example, the control unit (120) may be composed of one or more sets of processors. 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 RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory and / or a combination thereof.

[0279] Hereinafter, an implementation example of FIG. 16 will be described in more detail with reference to the drawings.

[0280] FIG. 17 illustrates a portable device according to one embodiment of the present disclosure. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a portable computer (e.g., a laptop, etc.). The portable device may be referred to as an MS (Mobile Station), UT (User Terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless Terminal). The embodiment of FIG. 17 may be combined with various embodiments of the present disclosure.

[0281] Referring to FIG. 17, 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 part of the communication unit (110). Blocks 110 to 130 / 140a to 140c each correspond to blocks 110 to 130 / 140 of FIG. 16.

[0282] 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 the components of the portable device (100) to perform various operations. The control unit (120) may include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / code / commands required for the operation of the portable device (100). Additionally, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the portable device (100) and may include wired / wireless charging circuits, batteries, etc. The interface unit (140b) can support the connection between the portable device (100) and other external devices. The interface unit (140b) may include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can receive or output video information / signals, audio information / signals, data, and / or information input by 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, etc.

[0283] For example, in the case of data communication, the input / output unit (140c) acquires information / signals (e.g., touch, text, voice, image, video) input from the user, and the acquired 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 another wireless device or to a base station. Additionally, the communication unit (110) can receive wireless signals from another wireless device or base station and then restore the received wireless signals to their 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).

[0284] The claims described in this specification may be combined in various ways. For example, the technical features of the method claims in this specification may be combined to be implemented as a device, and the technical features of the device claims in this specification may be combined to be implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a device, and the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a method.

Claims

1. Regarding the method, The first device acquires information related to a set of candidate random access resources; The first device comprises the step of acquiring location information of the first device; and A method comprising the step of the first device performing random access with a second device based on information related to a random access resource set related to location information among information related to a candidate random access resource set.

2. In Paragraph 1, A method comprising at least one of the above position information, which includes relative position information between the first device and the second device, distance information between the first device and the second device, or angle information between the first device and the second device.

3. In Paragraph 1, A method in which the above random access is performed based on information related to the set of random access resources related to at least one of transmission delay or elevation angle among the information related to the set of candidate random access resources.

4. In Paragraph 1, A method in which the above random access is performed based on information related to the set of random access resources associated with the orbital angular momentum mode used for the above random access among information related to the set of candidate random access resources.

5. In Paragraph 1, A method in which a resource for a reference signal related to the above random access is randomly selected by the first device.

6. In Paragraph 1, A method in which a resource for a reference signal related to the above random access is selected by the first device based on allocation information of some of the resources for the above random access.

7. In Paragraph 1, A method in which a resource for a reference signal associated with the above random access is selected by the first device based on at least one of the position information, elevation angle, transmission delay, or orbital angular momentum mode used for the above random access.

8. In Paragraph 1, A method in which the above random access is performed based on a transmission comprising at least one of a sequence or a data channel.

9. In Paragraph 1, A method comprising information related to the above-mentioned set of candidate random access resources, including information related to a first type of set of candidate random access resources and information related to a second type of set of candidate random access resources.

10. In Paragraph 9, A method in which the information related to the set of candidate random access resources of the first type is information related to the set of candidate random access resources for single transmission-based random access, and the information related to the set of candidate random access resources of the second type is information related to the set of candidate random access resources for iterative transmission-based random access.

11. In Paragraph 9, A method for determining a resource within the set of candidate random access resources of the first type above, which is different from the method for determining a resource within the set of candidate random access resources of the second type above.

12. In Paragraph 9, A method in which a resource within the set of candidate random access resources of the first type is determined by the first device based on a random access-related sequence, and a resource within the set of candidate random access resources of the second type is randomly determined by the first device.

13. In Paragraph 1, A method in which the first device is a terminal, and the second device is a base station, a network node, or a satellite.

14. In the first device, At least one transmitter / receiver; At least one processor; and The first device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Obtaining information related to a set of candidate random access resources; Acquiring location information of the first device; and A first device comprising: performing random access with a second device based on information related to a random access resource set related to the location information among information related to the above candidate random access resource set.

15. In a processing device, At least one processor; and The first device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Obtaining information related to a set of candidate random access resources; Acquiring location information of the first device; and A processing device comprising: performing random access with a second device based on information related to a random access resource set related to the location information among information related to the above candidate random access resource set.

16. A non-transient computer-readable storage medium that records instructions, The above commands cause the first device to perform an operation based on execution, wherein the operation is: Obtaining information related to a set of candidate random access resources; Acquiring location information of the first device; and A non-transient computer-readable storage medium comprising: performing random access with a second device based on information related to a random access resource set related to the location information among information related to the above-mentioned candidate random access resource set.

17. Regarding the method, The second device transmits information related to a set of candidate random access resources to the first device; and A method comprising the step of the second device performing random access with the first device based on information related to a random access resource set related to the location information of the first device among information related to the candidate random access resource set.

18. In the second device, At least one transmitter / receiver; At least one processor; and The second device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Transmitting information related to a set of candidate random access resources to a first device; and A second device comprising: performing random access with the first device based on information related to a random access resource set related to the location information of the first device among information related to the candidate random access resource set.

19. In a processing device, At least one processor; and The second device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Transmitting information related to a set of candidate random access resources to a first device; and A processing device comprising: performing random access with the first device based on information related to a random access resource set related to the location information of the first device among information related to the above candidate random access resource set.

20. A non-transient computer-readable storage medium that records instructions, The above commands cause the second device to perform an operation based on execution, wherein the operation is: Transmitting information related to a set of candidate random access resources to a first device; and A non-transient computer-readable storage medium comprising: performing random access with the first device based on information related to a random access resource set related to the location information of the first device among information related to the candidate random access resource set.

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