Method and apparatus for searching for and accessing cell for supporting multiple coverage

Abstract

Proposed is an operation method that may be performed by a first device (100) in a wireless communication system. The method may comprise the steps of: acquiring information related to the first device (100); on the basis of the information related to the first device (100), determining a cell type to be accessed, the cell type including a first cell type and a second cell type, and a cell of the first cell type comprising a plurality of cells of the second cell type; and attempting random access to a first cell of the determined cell type to be accessed.

Description

Method and device for cell search and access for multi-coverage support

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

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

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

[0004] Peak data rate per device 1 Tbps E2E latency 1 ms Max spectral efficiency 100 bps / Hz Mobility support Up to 1000 km / hr Satellite integration Fully AI Fully Autonomous vehicles Fully XR Fully Haptic communications Fully

[0005] According to one embodiment of the present disclosure, a method may be provided. For example, the method may include: obtaining information related to a first device; determining a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempting to randomly connect to a first cell of the determined cell type to be connected.

[0006] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause the first device to: obtain information related to the first device; determine a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempt a random connection to a first cell of the determined cell type to be connected.

[0007] According to one embodiment of the present disclosure, a processing device configured to control a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, may cause the first device to: obtain information related to the first device; determine a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempt a random connection to a first cell of the determined cell type to be connected.

[0008] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium having instructions recorded thereon may be provided. For example, the instructions, when executed, may cause a first device to: obtain information related to the first device; determine a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempt a random connection to a first cell of the determined cell type to be connected.

[0009] According to one embodiment of the present disclosure, a method may be provided. For example, the method comprises: transmitting resource information for random access to a first device, wherein the resource information includes information on a first random access resource associated with a first cell type and information on a second random access resource associated with a second cell type, wherein a cell of the first cell type is composed of a plurality of cells of the second cell type, and based on the information associated with the first device, a cell type to which the first device will attempt to access among the first cell type and the second cell type is determined, and a random access may be attempted by the first device to a first cell of the determined cell type to which the first device will attempt to access.

[0010] According to one embodiment of the present disclosure, a base station may be provided. For example, the base station 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, based on being executed by the at least one processor, cause the base station to: transmit resource information for random access to a first device, wherein the resource information includes information on a first random access resource associated with a first cell type and information on a second random access resource associated with a second cell type, wherein a cell of the first cell type is comprised of a plurality of cells of the second cell type, and based on information associated with the first device, a cell type to which the first device will attempt to access is determined among the first cell type and the second cell type, and the first device may attempt random access to a first cell of the determined cell type to which the first device will attempt to access.

[0011] FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.

[0012] FIG. 2 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure.

[0013] FIG. 3 illustrates an example of a typical scenario of an NTN based on a transparent payload, according to one embodiment of the present disclosure.

[0014] FIG. 4 illustrates an example of a typical scenario of an NTN based on a regenerative payload, according to one embodiment of the present disclosure.

[0015] FIG. 5 illustrates an example of a sensing operation according to one embodiment of the present disclosure.

[0016] FIG. 6 illustrates a slot structure of a frame according to one embodiment of the present disclosure.

[0017] FIG. 7 illustrates an example of a BWP according to one embodiment of the present disclosure.

[0018] FIG. 8 illustrates a procedure for a terminal to perform V2X or SL communication according to a resource allocation mode, according to one embodiment of the present disclosure.

[0019] FIG. 9 illustrates a synchronization source or synchronization reference of V2X according to one embodiment of the present disclosure.

[0020] FIG. 10 illustrates a synchronization signal transmitted separately for each cell coverage according to an embodiment of the present disclosure.

[0021] FIG. 11 illustrates a terminal having high mobility, such as an unmanned aerial vehicle (e.g., UAV) terminal, attempting cell search and connection to a first type cell according to one embodiment of the present disclosure.

[0022] FIG. 12 illustrates a terminal with low mobility, such as a pedestrian terminal, attempting cell search and connection to a second type cell according to one embodiment of the present disclosure.

[0023] FIG. 13 illustrates second type cells activated and deactivated according to a movement path of a terminal according to one embodiment of the present disclosure.

[0024] FIGS. 14 and 15 illustrate a terminal transmitting a reference signal for a second type cell associated with a first type cell according to one embodiment of the present disclosure.

[0025] FIG. 16 illustrates a procedure that can be performed by a first device according to one embodiment of the present disclosure.

[0026] Fig. 17 illustrates a communication system (1) according to one embodiment of the present disclosure.

[0027] FIG. 18 illustrates a wireless device according to one embodiment of the present disclosure.

[0028] FIG. 19 illustrates a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0029] FIG. 20 illustrates a wireless device according to an embodiment of the present disclosure.

[0030] FIG. 21 illustrates a mobile device according to one embodiment of the present disclosure.

[0031] FIG. 22 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure.

[0032] As used herein, "A or B" can mean "only A," "only B," or "both A and B." In other words, as used herein, "A or B" can be interpreted as "A and / or B." For example, as used herein, "A, B or C" can mean "only A," "only B," "only C," or "any combination of A, B and C."

[0033] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Accordingly, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0034] In this specification, "at least one of A and B" may mean "only A", "only B" or "both A and B". Additionally, in this specification, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted identically to "at least one of A and B".

[0035] Additionally, in this specification, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0036] Additionally, parentheses used herein may mean "for example." Specifically, when indicated as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information." In other words, "control information" in this specification 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."

[0037] In the following explanation, ‘when, if, in case of’ can be replaced with ‘based on’.

[0038] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0039] In this specification, higher layer parameters may be parameters that are set for the terminal, preset, or predefined. For example, a base station or network may transmit higher layer parameters to the terminal. For example, higher layer parameters may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0040] In this specification, "configured or defined" may be interpreted as being configured or preset to a device through predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In this specification, "configured or defined" may be interpreted as being preset to a device.

[0041] The technology proposed in this specification 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.

[0042] The technology proposed in this specification can be implemented with 6G wireless technology and applied to various 6G systems. For example, 6G systems can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0043] FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of FIG. 1 can be combined with various embodiments of the present disclosure.

[0044] New network characteristics in 6G may include:

[0045] - Satellite integrated network

[0046] - Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, upgrading the wireless evolution from "connected objects" to "connected intelligence." AI can be applied at every stage of the communication process (or at every signal processing step, as described below).

[0047] - Seamless integration of wireless information and energy transfer

[0048] - Ubiquitous super 3D connectivity: Access to networks and core network functions of drones and very low Earth orbit satellites will create super 3D connectivity in 6G ubiquitous.

[0049] Some general requirements for the new network characteristics of 6G, such as the above, may be as follows:

[0050] - small cell networks

[0051] - Ultra-dense heterogeneous network

[0052] - High-capacity backhaul

[0053] - Radar technology integrated with mobile technology: High-precision localization (or location-based services) through communications is a key feature of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0054] - Softwarization and virtualization

[0055] Below, the core implementation technologies of the 6G system are described.

[0056] - Artificial Intelligence: Incorporating AI into communications can streamline and improve real-time data transmission. AI can use numerous analytics to determine how complex target tasks should be performed. This means AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handovers, network selection, and resource scheduling can be performed instantly using AI. AI can also play a crucial role in machine-to-machine (M2M), machine-to-human, and human-to-machine communications. Furthermore, AI can facilitate rapid communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0057] - THz communication (terahertz communication): Data rates can be increased by increasing the bandwidth. This can be achieved by utilizing sub-THz communication with a wide bandwidth and applying advanced massive MIMO technology. THz waves, also known as sub-millimeter waves, typically refer to the frequency range between 0.1 THz and 10 THz with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz to 300 GHz band (Sub-THz band) is considered a major portion of the THz band for cellular communications. Adding the Sub-THz band to the mmWave band will increase the capacity of 6G cellular communications. Among the defined THz bands, 300 GHz to 3 THz lies in the far infrared (IR) frequency band. While part of the optical band, the 300 GHz to 3 THz band lies at the boundary of the optical band, immediately following the RF band. Therefore, this 300 GHz to 3 THz band exhibits similarities to RF. Figure 2 illustrates the electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment of FIG. 2 can be combined with various embodiments of the present disclosure. Key characteristics of THz communications include (i) widely available bandwidth to support very high data rates, and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth generated by the highly directional antenna reduces interference. The small wavelength of THz signals allows for a much larger number of antenna elements to be integrated into devices and base stations operating in this band. This enables the use of advanced adaptive array technologies to overcome range limitations.

[0058] - Large-scale MIMO technology

[0059] - Hologram beamforming (HBF)

[0060] - Optical wireless technology

[0061] - Free-space optical transmission backhaul network (FSO backhaul network)

[0062] - Quantum communication

[0063] - Cell-free communication

[0064] - Integration of wireless information and power transmission

[0065] - Integration of wireless communication and sensing

[0066] - Integrated access and backhaul network

[0067] - Big data analysis

[0068] - Reconfigurable intelligent surface

[0069] - metaverse

[0070] - Blockchain

[0071] Unmanned aerial vehicles (UAVs): UAVs, or drones, will be a key element in 6G wireless communications. In most cases, high-speed data wireless connectivity can be provided using UAV technology. Base stations (BSs) can be installed on UAVs to provide cellular connectivity. UAVs may offer specific capabilities not found in fixed BS infrastructure, such as easy deployment, robust line-of-sight links, and controlled mobility. During emergencies such as natural disasters, deploying terrestrial communications infrastructure is not economically feasible and sometimes cannot provide services in volatile environments. UAVs can easily handle these situations. UAVs will become a new paradigm in wireless communications. This technology facilitates three fundamental requirements for wireless networks: enhanced mobile broadband (eMBB), URLLC, and mMTC. UAVs can also support various purposes, such as enhancing network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is recognized as one of the most important technologies for 6G communications.

[0072] - Advanced air mobility (AAM): AAM is a higher concept than urban air mobility (UAM), which is an air transportation method available in urban areas, and can refer to a means of transportation that includes movement between regional hubs as well as urban areas.

[0073] - Autonomous driving (self-driving): V2X (vehicle to everything), a key element in building autonomous driving infrastructure, can be a technology that allows cars to communicate and share with various elements on the road for autonomous driving, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) wireless communication. Fast transmission speeds and low-latency technologies are essential to maximize autonomous driving performance and ensure high safety. Furthermore, in the future, autonomous driving will go beyond simply providing warnings or guidance messages to drivers and may require active intervention in vehicle operation and direct control of the vehicle in dangerous situations. To this end, the amount of information that needs to be transmitted and received may become enormous, so 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0074] - Non-terrestrial networks (NTN): NTN may refer to a network or network segment that uses radio frequency (RF) resources mounted on a satellite (or unmanned aerial system (UAS) platform). FIG. 3 illustrates an example of a typical NTN scenario based on a transparent payload according to an embodiment of the present disclosure. FIG. 4 illustrates an example of a typical NTN scenario based on a regenerative payload according to an embodiment of the present disclosure. The embodiments of FIG. 3 or FIG. 4 may be combined with various embodiments of the present disclosure. Referring to FIG. 3, a satellite (or UAS platform) may create a service link with a UE. The satellite (or UAS platform) may be connected to a gateway via a feeder link. The satellite may be connected to a data network via the gateway. A beam footprint may refer to an area where a signal transmitted by a satellite can be received. Referring to Figure 4, a satellite (or UAS platform) can establish a service link with a UE. A satellite (or UAS platform) connected to a UE can be connected to another satellite (or UAS platform) via an inter-satellite link (ISL). The other satellite (or UAS platform) can be connected to a gateway via a feeder link. Based on the playback payload, a satellite can be connected to a data network through another satellite and the gateway. If an ISL does not exist between a satellite and another satellite, a feeder link between the satellite and the gateway may be required. Figures 3 and 4 are merely examples of NTN scenarios, and NTN can be implemented based on various scenarios.For example, a satellite (or UAS platform) may implement a transparent or regenerative (with onboard processing) payload. For example, a satellite (or UAS platform) may generate multiple beams over a designated service area depending on the field of view of the satellite (or UAS platform). For example, the field of view of the satellite (or UAS platform) may vary depending on the onboard antenna diagram and minimum elevation angle. For example, a transparent payload may include radio frequency filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be altered. For example, a regenerative payload may include radio frequency filtering, frequency conversion and amplification, demodulation / decoding, switching and / or routing, and coding / modulation. For example, a regenerative payload may be substantially equivalent to equipping the satellite (or UAS platform) with all or part of the base station functionality.

[0075] - 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. Because radio frequency sensing does not require a device to connect to the object through a network, it can provide a service for object positioning without a device. The ability to obtain range, velocity, and angle information from radio frequency signals can enable a wide range of new capabilities, such as various object detection, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to a variety of industries (e.g., drones, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can utilize non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of a wireless sensing service, i.e., a sensing operation, may depend on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing may provide an opportunity to enhance existing communication systems from a communication network to a wireless communication and sensing network. FIG. 5 illustrates an example of a sensing operation according to an embodiment of the present disclosure. The embodiment of FIG. 5 may be combined with various embodiments of the present disclosure. Specifically, FIG. 5 (a) illustrates an example of sensing using a sensing receiver and a sensing transmitter located at the same location (e.g., monostatic sensing), and FIG. 5 (b) illustrates an example of sensing using a separated sensing receiver and a sensing transmitter (e.g., bistatic sensing).

[0076] The layers of the radio interface protocol between the terminal and the network can be divided into L1 (layer 1), L2 (layer 2), and L3 (layer 3) based on the three lower layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems. Among these, the physical layer belonging to layer 1 provides an information transfer service using a physical channel, and the RRC (Radio Resource Control) layer located in layer 3 controls radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0077] The physical layer provides information transmission services to higher layers using physical channels. The physical layer is connected to the upper layer, the Medium Access Control (MAC) layer, via a transport channel. Data travels between the MAC layer and the physical layer through the transport channel. Transport channels are classified based on how and with what characteristics data is transmitted over the wireless interface.

[0078] Data travels between different physical layers, i.e., between the physical layers of a transmitter and a receiver, via a physical channel. This physical channel can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and utilizes time and frequency as radio resources.

[0079] The MAC layer provides services to the upper layer, the radio link control (RLC) layer, through logical channels. The MAC layer provides mapping from multiple logical channels to multiple transport channels. Furthermore, the MAC layer provides logical channel multiplexing, which maps multiple logical channels to a single transport channel. The MAC sublayer provides data transmission services on logical channels.

[0080] The RLC layer performs the concatenation, segmentation, and reassembly of RLC Service Data Units (SDUs). To guarantee the various Quality of Service (QoS) required by radio bearers (RBs), the RLC layer provides three operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0081] The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transport channels, and physical channels, related to the configuration, reconfiguration, and release of radio bearers. RB refers to a logical path provided by Layer 1 (physical layer or PHY layer) and Layer 2 (MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP) layer, and Service Data Adaptation Protocol (SDAP) layer) for data transmission between the terminal and the network.

[0082] The functions of the PDCP layer in the user plane include the transmission of user data, header compression, and ciphering. The functions of the PDCP layer in the control plane include the transmission of control plane data and encryption / integrity protection.

[0083] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. It performs mapping between QoS flows and data radio bearers, marking QoS flow identifiers (IDs) within downlink and uplink packets, and more.

[0084] Establishing a Radio Bearer (RB) refers to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service, and setting specific parameters and operating methods for each. RBs can be further divided into two types: the Signaling Radio Bearer (SRB) and the Data Radio Bearer (DRB). The SRB is used as a channel to transmit RRC messages in the control plane, while the DRB is used as a channel to transmit user data in the user plane.

[0085] When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in the RRC_CONNECTED state. Otherwise, it is in the RRC_IDLE state. For NR, the RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state can maintain a connection with the core network while releasing the connection with the base station.

[0086] Downlink transmission channels that transmit data from the network to the terminal include the Broadcast Channel (BCH), which transmits system information, and the downlink Shared Channel (SCH), which transmits user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be transmitted through the downlink SCH or a separate downlink Multicast Channel (MCH). Meanwhile, uplink transmission channels that transmit data from the terminal to the network include the Random Access Channel (RACH), which transmits initial control messages, and the uplink Shared Channel (SCH), which transmits user traffic or control messages.

[0087] Logical channels that are located above the transport channel and are mapped to the transport channel include the Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Multicast Control Channel (MCCH), and Multicast Traffic Channel (MTCH).

[0088] Radio frames can be used for uplink and downlink transmission. A radio frame has a length of 10 ms and can be defined as two 5 ms half-frames (HF). A half-frame can contain five 1 ms subframes (SF). A subframe can be divided into one or more slots, and the number of slots within a subframe can be determined by the subcarrier spacing (SCS). Each slot can contain 12 or 14 OFDM (A) symbols, depending on the cyclic prefix (CP).

[0089] When normal CP is used, each slot can contain 14 symbols. When extended CP is used, each slot can contain 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA (Single Carrier - FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0090] Table 2 below shows the number of symbols per slot (N) depending on the SCS setting (u) when normal CP or extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is an example.

[0091] CP type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slot Normal CP15kHz (u=0)1410130kHz (u=1)1420260kHz (u=2)14404120kHz (u=3)14808240kHz (u=4)1416016Extended CP60kHz (u=2)12404

[0092] FIG. 6 illustrates a slot structure of a frame according to an embodiment of the present disclosure. The embodiment of FIG. 6 can be combined with various embodiments of the present disclosure.

[0093] Referring to FIG. 6, a slot includes multiple symbols in the time domain.

[0094] A carrier includes multiple subcarriers in the frequency domain. An RB (Resource Block) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) can be defined as multiple consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain, and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed through activated BWPs. Each element can be referred to as a Resource Element (RE) in the resource grid, and one complex symbol can be mapped to it.

[0095] A Bandwidth Part (BWP) can be a contiguous set of physical resource blocks (PRBs) for a given numerology. A PRB can be selected from a contiguous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0096] FIG. 7 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 7 can be combined with various embodiments of the present disclosure. In the embodiment of FIG. 7, it is assumed that there are three BWPs.

[0097] Referring to Figure 7, a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier band to the other. Furthermore, a PRB may be a numbered resource block within each BWP. Point A may indicate a common reference point for the resource block grid.

[0098] BWP is point A, offset from point A (N startBWP ) and bandwidth (N size BWP ) can be set by. For example, point A can be an outer reference point of the PRB of a carrier where subcarrier 0 of all numerologies (e.g., all numerologies supported by the network on that carrier) aligns. For example, the offset can be the PRB spacing between the lowest subcarrier in a given numerology and point A. For example, the bandwidth can be the number of PRBs in a given numerology.

[0099] SLSS (Sidelink Synchronization Signal) is a SL (sidelink) specific sequence and may include PSSS (Primary Sidelink Synchronization Signal) and SSSS (Secondary Sidelink Synchronization Signal). The PSSS may be referred to as S-PSS (Sidelink Primary Synchronization Signal) and the SSSS may be referred to as S-SSS (Sidelink Secondary Synchronization Signal). For example, length-127 M-sequences may be used for S-PSS and length-127 Gold sequences may be used for S-SSS. For example, a terminal may detect an initial signal (signal detection) and obtain synchronization using S-PSS. For example, the terminal can obtain detailed synchronization using S-PSS and S-SSS and detect a synchronization signal ID.

[0100] PSBCH (Physical Sidelink Broadcast Channel) may be a (broadcast) channel that transmits basic (system) information that a terminal must know first before transmitting or receiving an SL signal. For example, the basic information may be information related to SLSS, duplex mode (DM), TDD UL / DL (Time Division Duplex Uplink / Downlink) configuration, resource pool-related information, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH may be 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0101] S-PSS, S-SSS and PSBCH may be included in a block format supporting periodic transmission (e.g., SL SS (Synchronization Signal) / PSBCH block, hereinafter referred to as S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB may have the same numerology (i.e., SCS and CP length) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) in the carrier, and the transmission bandwidth may be within a (pre-)configured SL BWP (Sidelink BWP). For example, the bandwidth of the S-SSB may be 11 RBs (Resource Blocks). For example, the PSBCH may span 11 RBs. And, the frequency location of the S-SSB may be (pre-)configured. Therefore, the terminal does not need to perform hypothesis detection in the frequency to discover the S-SSB in the carrier.

[0102] In this specification, PSCCH may be replaced by a control channel, a physical control channel, a sidelink-related control channel, a sidelink-related physical control channel, etc. In this specification, PSSCH may be replaced by a shared channel, a physical shared channel, a sidelink-related shared channel, a sidelink-related physical shared channel, etc.

[0103] FIG. 8 illustrates a procedure for a terminal to perform V2X or SL communication according to a resource allocation mode, according to one embodiment of the present disclosure. The embodiment of FIG. 8 may be combined with various embodiments of the present disclosure.

[0104] Referring to (a) of FIG. 8, in resource allocation mode 1, the base station may schedule SL resources to be used by the terminal for SL transmission. For example, in step S800, the base station may transmit information related to SL resources and / or information related to UL resources to the first terminal. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0105] For example, a first terminal may receive information related to a dynamic grant (DG) resource and / or information related to a configured grant (CG) resource from a base station. For example, a CG resource may include a CG type 1 resource or a CG type 2 resource. In this specification, a DG resource may be a resource that a base station configures / allocates to the first terminal via downlink control information (DCI). In this specification, a CG resource may be a (periodic) resource that a base station configures / allocates to the first terminal via DCI and / or an RRC message. For example, in the case of a CG type 1 resource, the base station may transmit an RRC message including information related to the CG resource to the first terminal. For example, in the case of a CG type 2 resource, the base station may transmit an RRC message including information related to the CG resource to the first terminal, and the base station may transmit a DCI related to activation or release of the CG resource to the first terminal.

[0106] In step S810, the first terminal may transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal based on the resource scheduling. In step S820, the first terminal may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal. In step S830, the first terminal may receive a PSFCH related to the PSCCH / PSSCH from the second terminal. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second terminal via the PSFCH. In step S840, the first terminal may transmit / report HARQ feedback information to the base station via a PUCCH or a PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on the HARQ feedback information received from the second terminal. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on a rule set in advance. For example, the DCI may be DCI for scheduling SL.

[0107] Referring to (b) of FIG. 8, in resource allocation mode 2, the terminal can determine SL transmission resources within SL resources set by the base station / network or preset SL resources. For example, the set SL resources or preset SL resources may be a resource pool. For example, the terminal can autonomously select or schedule resources for SL transmission. For example, the terminal can perform SL communication by selecting resources by itself within the set resource pool. For example, the terminal can select resources by itself within a selection window by performing sensing and resource (re)selection procedures. For example, the sensing can be performed on a subchannel basis. For example, in step S810, the first terminal that has selected resources by itself within the resource pool transmits PSCCH (e.g., SCI (Sidelink Control Information) or 1) using the resources. st -stage SCI) can be transmitted to the second terminal. In step S820, the first terminal transmits the PSSCH (e.g., 2) related to the PSCCH. nd -stage SCI, MAC PDU, data, etc.) can be transmitted to the second terminal. In step S830, the first terminal can receive a PSFCH related to the PSCCH / PSSCH from the second terminal.

[0108] Referring to (a) or (b) of FIG. 8, for example, a first terminal may transmit an SCI to a second terminal on a PSCCH. Or, for example, the first terminal may transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second terminal on the PSCCH and / or the PSSCH. In this case, the second terminal may decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first terminal. In the present specification, an SCI transmitted on a PSCCH is 1 st SCI, 1st SCI, 1st -stage SCI or 1 st -stage SCI format, and the SCI transmitted on the PSSCH is 2 nd SCI, 2nd SCI, 2 nd -stage SCI or 2 nd -It can be called a stage SCI format.

[0109] Referring to (a) or (b) of FIG. 8, in step S830, the first terminal may receive a PSFCH. For example, the first terminal and the second terminal may determine PSFCH resources, and the second terminal may use the PSFCH resources to transmit HARQ feedback to the first terminal.

[0110] Referring to (a) of FIG. 8, in step S840, the first terminal may transmit SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0111] Below, the synchronization acquisition of the SL terminal is described.

[0112] In time division multiple access (TDMA) and frequency division multiple access (FDMA) systems, accurate time and frequency synchronization is essential. If time and frequency synchronization is not accurate, system performance may be degraded due to inter-symbol interference (ISI) and inter-carrier interference (ICI). This is also the case in V2X. In V2X, for time / frequency synchronization, the sidelink synchronization signal (SLSS) can be used in the physical layer, and the master information block-sidelink-V2X (MIB-SL-V2X) can be used in the radio link control (RLC) layer.

[0113] FIG. 9 illustrates a synchronization source or synchronization reference of V2X according to one embodiment of the present disclosure. The embodiment of FIG. 9 can be combined with various embodiments of the present disclosure.

[0114] Referring to Fig. 9, in V2X, a terminal can be directly synchronized to a global navigation satellite system (GNSS), or can be indirectly synchronized to a GNSS through a terminal (within network coverage or outside network coverage) that is directly synchronized to a GNSS. When a GNSS is set as a synchronization source, the terminal can calculate the DFN and subframe number using the Coordinated Universal Time (UTC) and a (pre-)configured DFN offset.

[0115] Alternatively, the terminal may be synchronized directly to the base station, or may be synchronized to another terminal that is time / frequency synchronized to the base station. For example, the base station may be an eNB or a gNB. For example, if the terminal is within network coverage, the terminal may receive synchronization information provided by the base station and be synchronized directly to the base station. Thereafter, the terminal may provide the synchronization information to other adjacent terminals. If the base station timing is set as the synchronization reference, the terminal may follow the cell associated with the frequency (if within cell coverage at the frequency), the primary cell, or the serving cell (if outside cell coverage at the frequency) for synchronization and downlink measurements.

[0116] A base station (e.g., a serving cell) may provide synchronization settings for a carrier used for V2X or SL communications. In this case, the terminal may follow the synchronization settings received from the base station. If the terminal does not detect any cell on the carrier used for V2X or SL communications and does not receive synchronization settings from the serving cell, the terminal may follow the preset synchronization settings.

[0117] Alternatively, the terminal may synchronize with another terminal that has not obtained synchronization information directly or indirectly from the base station or GNSS. The synchronization source and preference may be preset for the terminal. Alternatively, the synchronization source and preference may be set via a control message provided by the base station.

[0118] An SL synchronization source can be associated with a synchronization priority. For example, the relationship between a synchronization source and a synchronization priority can be defined as shown in Table 3 or Table 4 below. Table 3 or Table 4 is merely an example, and the relationship between a synchronization source and a synchronization priority can be defined in various forms.

[0119] Priority Levels GNSS-based synchronization Base station-based synchronization (eNB / gNB-based synchronization) P0 GNSS Base station P1 All terminals directly synchronized to GNSS All terminals directly synchronized to the base station P2 All terminals indirectly synchronized to GNSS All terminals indirectly synchronized to the base station P3 All other terminals GNSS SP4 All terminals directly synchronized to N / AGNSS P5 All terminals indirectly synchronized to N / AGNSS P6 N / A All other terminals

[0120] Priority Levels GNSS-based synchronization Base station-based synchronization (eNB / gNB-based synchronization) P0 GNSS Base station P1 All terminals directly synchronized to GNSS All terminals directly synchronized to the base station P2 All terminals indirectly synchronized to GNSS All terminals indirectly synchronized to the base station P3 Base station GNSS SP4 All terminals directly synchronized to the base station All terminals directly synchronized to GNSS P5 All terminals indirectly synchronized to the base station All terminals indirectly synchronized to GNSS P6 Remaining terminal(s) with lower priority Remaining terminal(s) with lower priority

[0121] In Table 3 or Table 4, P0 may mean the highest priority, and P6 may mean the lowest priority. In Table 3 or Table 4, the base station may include at least one of a gNB or an eNB.

[0122] Whether GNSS-based or base station-based synchronization is used can be (pre-)configured. In single-carrier operation, the terminal can derive its transmission timing from the available synchronization reference with the highest priority.

[0123] Meanwhile, each SLSS may have a Sidelink Synchronization Identifier (SLSS ID).

[0124] For example, for LTE SL or LTE V2X, the value of SLSS ID can be defined based on a combination of two different S-PSS sequences and 168 different S-SSS sequences. For example, the number of SLSS IDs can be 336. For example, the value of SLSS ID can be any one of 0 to 335.

[0125] For example, for NR SL or NR V2X, the value of SLSS ID can be defined based on a combination of two different S-PSS sequences and 336 different S-SSS sequences. For example, the number of SLSS IDs can be 672. For example, the value of SLSS ID can be any one of 0 to 671. For example, among the two different S-PSS, one S-PSS can be associated with in-coverage, and the other S-PSS can be associated with out-of-coverage. For example, SLSS IDs of 0 to 335 can be used in-coverage, and SLSS IDs of 336 to 671 can be used out-of-coverage.

[0126] With the recent rapid development of technologies related to unmanned aerial vehicles (e.g., UAVs) and / or drones, active research is being conducted in the field of wireless communications to utilize unmanned aerial vehicles (e.g., UAVs) as communication nodes within wireless communication systems. For example, in the description below, drones and unmanned aerial vehicles (e.g., UAVs) may be interchangeable / substituted. Furthermore, for example, in the description below, unmanned aerial vehicles (e.g., UAVs) may be interchangeable / substituted with unmanned aerial vehicle (e.g., UAV) terminals.

[0127] For example, an unmanned aerial vehicle (e.g., UAV) may serve as a relay node that provides communication services within the wireless communication system and / or as a terminal node that receives communication services within the wireless communication system. Here, the unmanned aerial vehicle (e.g., UAV) terminal may have characteristics such as movement in three-dimensional space, flexible trajectory, and / or high speed, and may have mobility that is clearly distinct from that of conventional ground terminals (e.g., pedestrian terminals, vehicles, etc.). Therefore, base stations and / or cells in next-generation wireless communication systems may need to evolve to support both low-mobility terminals and / or high-mobility terminals. Therefore, the present disclosure proposes a method and apparatus for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage in a wireless communication system. Hereinafter, a method for supporting two coverages is mainly described in the present disclosure, but the proposals of the present disclosure can be extended to support two or more arbitrary coverages. Hereinafter, corresponding to a coverage, for example, may mean serving that coverage.

[0128] [Proposal #01]

[0129] According to one embodiment of the present disclosure, a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage in a wireless communication system may be provided. Here, for example, a base station may transmit a first synchronization signal including (full) identifier information for a first type cell and / or a second synchronization signal including (full and / or part) identifier information for a second type cell. For example, the first synchronization signal may be a primary synchronization signal (e.g., PSS). For example, the second synchronization signal may be a secondary synchronization signal (e.g., SSS).

[0130] For example, the first type cell may refer to a cell composed of a plurality of second type cell(s). For example, in the following, the plurality of second type cell(s) may be replaced / substituted with at least one second type cell. For example, in the following, the first type cell may refer to a cell of the first cell type, and the second type cell may refer to a cell of the second cell type.

[0131] Here, the (entire) identifier information for the second type cell may be indicated by the second synchronization signal alone or may be indicated by utilizing both the first synchronization signal and the second synchronization signal. For example, the second synchronization signal may indicate the second type cell identifier information within the first type cell, and by combining the information with the first type cell identifier information indicated by the first synchronization signal, the entire second type cell identifier information may be obtained.

[0132] Here, the first synchronization signal may be transmitted with resources that are distinguished by the first type cell unit. For example, the first synchronization signal may be transmitted based on different resources for each cell of the first cell type. For example, the first synchronization signal may have a format in which the same resource is transmitted in a single frequency network (e.g., SFN) manner from the second type cell(s) constituting the first type cell. For example, the first synchronization signal may be transmitted in a format in which the same resource is transmitted in a single frequency network (e.g., SFN) manner from the second type cell(s) constituting the first type cell. Here, the second synchronization signal may be transmitted with resources that are distinguished by the second type cell unit. For example, the second synchronization signal may be transmitted based on different resources for each cell of the second cell type.

[0133] Here, the first synchronization signal and the second synchronization signal can be distinguished in the time domain and / or the frequency domain and / or the code domain.

[0134] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0135] Here, for example, when a terminal searches for a cell using a synchronization signal, synchronization signals differentiated by coverage may be required to support both the first type cell and the second type cell.

[0136] For example, the base station may transmit a first synchronization signal including (full) identifier information for a first type cell and / or a second synchronization signal including (full and / or part) identifier information for a second type cell.

[0137] Here, the (entire) identifier information for the second type cell may be indicated by the second synchronization signal alone, or may be indicated by utilizing both the first synchronization signal and the second synchronization signal. For example, the second synchronization signal may indicate the second type cell identifier information within the first type cell, and the entire second type cell identifier information may be obtained by combining the information with the first type cell identifier information indicated in the first synchronization signal. According to the proposed operation of the present disclosure, the base station may provide synchronization signals differentiated by coverage, and the terminal may perform a cell search process for an appropriate cell type by utilizing a synchronization signal suitable for its mobility.

[0138] FIG. 10 illustrates a synchronization signal transmitted separately for each cell coverage area according to an embodiment of the present disclosure. The embodiment of FIG. 10 may be combined with various embodiments of the present disclosure.

[0139] Referring to FIG. 10, a base station can transmit a synchronization signal appropriate for each cell type for two cell types (e.g., a first type cell and a second type cell) that support different coverages. For example, if there are three second type cells (a second cell, a third cell, and a fourth cell) within a first type cell (a first cell), and assuming that the three second type cells are served by a first base station, a second base station, and a third base station, respectively, the first base station can transmit both a synchronization signal associated with the first cell and a synchronization signal associated with the second cell, the second base station can transmit both a synchronization signal associated with the first cell and a synchronization signal associated with the third cell, and the third base station can transmit both a synchronization signal associated with the first cell and a synchronization signal associated with the fourth cell.

[0140] The above [Proposal #01] can be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0141] [Proposal #02]

[0142] According to one embodiment of the present disclosure, in a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage in a wireless communication system, a method may be provided in which a base station distinguishes and notifies random access resources for a first type cell (hereinafter, a first random access resource) and random access resources for a second type cell (hereinafter, a second random access resource) through system information.

[0143] Here, the first type cell may mean a cell composed of a plurality of second type cell(s).

[0144] Here, if the base station does not support the first type cell (or the second type cell), the first random access resource (or the second random access resource) may not be set.

[0145] Here, for example, the first random access resource and the second random access resource can be distinguished in the time domain and / or the frequency domain and / or the code domain.

[0146] Here, the random access resource may have a (partial) correspondence with a synchronization signal resource. That is, for example, the first random access resource may have a (partial) correspondence with a synchronization signal resource used in a first type cell, and / or the second random access resource may have a (partial) correspondence with a synchronization signal resource used in a second type cell.

[0147] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0148] Here, for example, when a terminal accesses a cell via a (random) access resource, (random) access resources distinguished by coverage may be required to support both the first type cell and the second type cell. For example, the base station may (separately) inform the terminal of the random access resource for the first type cell (hereinafter referred to as the first random access resource) and the random access resource for the second type cell (hereinafter referred to as the second random access resource) through system information.

[0149] Here, if the base station does not support the first type cell (or the second type cell), the first random access resource (or the second random access resource) may not be set. Here, the first random access resource and the second random access resource may be distinguished in the time domain and / or the frequency domain and / or the code domain.

[0150] For example, random access channel (e.g., RACH) preamble resources used by unmanned aerial vehicle (e.g., UAV) terminal(s) and pedestrian terminal(s) may have the same time and frequency resources, but may be distinguished by different sequences. That is, for example, the time and frequency resources of a random access channel (e.g., RACH) preamble resource used in a first type cell and a random access channel (e.g., RACH) preamble resource used in a second type cell may be the same, but the two resources may be distinguished based on different sequences.

[0151] According to the proposed operation of the present disclosure, a base station can provide random access resources classified by coverage, and a terminal can utilize random access resources appropriate to its mobility to attempt cell access to an appropriate cell type. Furthermore, the base station can obtain coverage information to be provided to connected terminals through the classified random access resources, and can separately manage a list of terminals for each coverage.

[0152] The above [Proposal #02] can be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0153] [Proposal #03]

[0154] According to one embodiment of the present disclosure, in a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage, a method may be provided in which a terminal selectively performs one of the following cell search and / or random access processes depending on terminal capability and / or terminal mobility.

[0155] (1) Cell search and / or random access process based on Type 1 cell identifier

[0156] (2) Cell search and / or random access process based on the second type cell identifier.

[0157] Here, the first type cell may mean a cell composed of a plurality of second type cell(s).

[0158] Here, the terminal can obtain first type cell identifier information and / or second type cell identifier information through synchronization signal detection.

[0159] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0160] Here, when synchronization signals and / or (random) access resources are provided that are differentiated by coverage and / or cell type according to other proposed method(s) of the present disclosure, the terminal can select an appropriate coverage and / or cell type according to its own capabilities and / or mobility, and perform cell search and / or random access processes by utilizing the synchronization signals and / or (random) access resources accordingly. According to the proposed method(s) of the present disclosure, the terminal can perform cell search and / or cell access processes that support its own mobility.

[0161] FIG. 11 illustrates a highly mobile terminal, such as an unmanned aerial vehicle (e.g., UAV) terminal, attempting cell search and connection to a first type cell according to one embodiment of the present disclosure. The embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.

[0162] FIG. 12 illustrates a low-mobility terminal, such as a pedestrian terminal, attempting to search for and access a second type cell according to one embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.

[0163] Referring to Figures 11 and 12, examples of cell type search and connection based on terminal mobility are presented. For example, a terminal with high mobility, such as an unmanned aerial vehicle (e.g., UAV) terminal, may attempt cell search and connection for a first type cell, while a terminal with low mobility, such as a pedestrian terminal, may attempt cell search and connection for a second type cell.

[0164] The above [Proposal #03] can be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0165] [Proposal #04]

[0166] According to one embodiment of the present disclosure, in a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage, a method may be provided in which a base station provides a first type cell-based transmission configuration and / or a second type cell-based transmission configuration (associated with the first type cell) to a terminal (connected to the first type cell).

[0167] Here, the first type cell may mean a cell composed of a plurality of second type cell(s).

[0168] Here, for example, the resource area according to the first type cell-based transmission configuration and the resource area according to the second type cell-based transmission configuration may be set to be the same or different. For example, the resource area according to the first type cell-based transmission configuration and the resource area according to the second type cell-based transmission configuration may be set to be the same, partially overlap, or completely different. For example, the resource area according to the first type cell-based transmission configuration and the resource area according to the second type cell-based transmission configuration may be set to have different partial bandwidths (e.g., BWP; bandwidth part). For example, the resource area according to the first type cell-based transmission configuration and the resource area according to the second type cell-based transmission configuration may be set to be included in different partial bandwidths (e.g., BWP; bandwidth part).

[0169] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0170] Here, for example, an unmanned aerial vehicle (e.g., UAV) terminal can access the first type cell, and connectivity can be guaranteed within a wide coverage area. Here, if the base station only supports the first type cell-based transmission for the unmanned aerial vehicle (e.g., UAV) terminal, the reusability of radio resources may be reduced, resulting in inefficient resource utilization. Therefore, the present disclosure provides a method for a base station to provide a first type cell-based transmission configuration and / or a second type cell-based transmission configuration (associated with the first type cell) to a terminal (connected to the first type cell).

[0171] For example, a base station can transmit type 1 cell-based transmission configuration information to an unmanned aerial vehicle (e.g., UAV) terminal. For example, in addition to the type 1 cell-based transmission configuration information, the base station can provide type 2 cell(s)-based transmission configuration information constituting the type 1 cell to the unmanned aerial vehicle (e.g., UAV) terminal. The type 2 cell-based transmission configuration can be utilized for performing type 2 cell-based transmission in the future. According to the proposal of the present disclosure, a terminal can have connectivity with both type 1 cells and type 2 cells, and both type 1 cell-based stable mobility and type 2 cell-based efficient data transmission and reception can be supported.

[0172] The above [Proposal #04] can be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0173] [Proposal #05]

[0174] According to one embodiment of the present disclosure, in a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage, a method may be provided in which a base station configures / instructs a terminal (connected to the first type cell) to activate and / or deactivate a specific second type cell (within the first type cell) (associated with the first type cell) for a specific physical channel, and to perform transmission and / or reception for the specific physical channel within the activated second type cell (or not to perform transmission and / or reception for the specific physical channel within the deactivated second type cell). For example, the specific physical channel (or physical channel) may include a terminal-to-terminal physical channel (e.g., PSCCH, PSSCH, PSFCH, etc.).

[0175] Here, the first type cell may mean a cell composed of a plurality of second type cell(s).

[0176] Here, for example, whether a particular second type cell (associated with a first type cell) is activated and / or deactivated may be applied differently (or independently) per physical channel.

[0177] Here, for example, if there is no second type cell (associated with a first type cell) activated for a specific physical channel, the terminal may perform transmission and / or reception operations for the physical channel according to the first type cell-based transmission settings.

[0178] Here, for example, the base station may provide information about the second type of cell(s) that are activated according to the location and / or path of the terminal. Here, the terminal may pre-report information about the location and / or path of the terminal to the base station.

[0179] Here, for example, the activation / deactivation message for the second type cell may be transmitted according to the first type cell-based transmission settings.

[0180] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0181] Here, for example, the base station may provide both a first type cell-based service and / or a second type cell-based service (associated with a first type cell) to the unmanned aerial vehicle (e.g., UAV) terminal for the purpose of obtaining flight stability and efficiency of radio resources.

[0182] Here, the base station can set / instruct the terminal (connected to the first type cell) to activate and / or deactivate a specific second type cell (associated with the first type cell) for a specific physical channel, and to perform transmission and / or reception for the specific physical channel within the activated second type cell (or not to perform transmission and / or reception within the deactivated second type cell).

[0183] Here, for example, if the terminal has reported its movement path to the base station in advance and / or if the base station can predict the movement path of the terminal, the base station can provide (to the terminal) information about the second type cell(s) that are activated according to the location and / or path of the terminal. Here, the terminal can perform the corresponding physical channel transmission according to the transmission settings corresponding to the second type cell that is activated.

[0184] FIG. 13 illustrates second type cells activated and deactivated according to a terminal's movement path, according to one embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.

[0185] Referring to FIG. 13, when a first type cell is composed of a plurality of second type cell(s), a specific second type cell within the first type cell is activated according to the movement path of an unmanned aerial vehicle (e.g., UAV) terminal, and the unmanned aerial vehicle (e.g., UAV) terminal can receive service through the activated cell.

[0186] The above [Proposal #05] can be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0187] [Proposal #06]

[0188] According to one embodiment of the present disclosure, in a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage, a method may be provided in which a base station separately sets / instructs a terminal (connected to a first type cell) to distinguish between a first service to be communicated with a first type cell and a second service to be communicated with a second type cell.

[0189] Here, the first type cell may mean a cell composed of a plurality of second type cell(s).

[0190] Here, the first service may include flight control information of an unmanned aerial vehicle (e.g., UAV) terminal.

[0191] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0192] Here, for example, the base station can provide both the first type cell-based service and / or the second type cell-based service (associated with the first type cell) to the unmanned aerial vehicle (e.g., UAV) terminal for the purpose of obtaining flight stability and efficiency of radio resources. Specifically, for example, the base station can support a service for flight control information of the unmanned aerial vehicle (e.g., UAV) terminal (e.g., C2 mode in 3GPP) based on the first type cell, and support an unmanned aerial vehicle (e.g., UAV) terminal-based application service (e.g., photo and / or video streaming, etc.) based on the second type cell. For example, a service for flight control information of the unmanned aerial vehicle (e.g., UAV) terminal (e.g., C2 mode in 3GPP) can be serviced in the first type cell, and an unmanned aerial vehicle (e.g., UAV) terminal-based application service (e.g., photo and / or video streaming, etc.) can be serviced in the second type cell.

[0193] The above [Proposal #06] may be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0194] [Proposal #07]

[0195] According to one embodiment of the present disclosure, in a method for supporting a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage, a method may be provided in which a base station transmits a trigger signal according to a first type cell-based transmission setting to a terminal (connected to a first type cell), and the terminal performs one or more of the following operations upon receiving the trigger signal.

[0196] (1) Type 1 cell target terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel transmission

[0197] For example, the terminal may perform transmission of a terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel targeted to a first type cell. Here, the base station may measure and / or receive a report of the reception strength of each second type cell through the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel, and determine the second type cell(s) (associated with the first type cell) to be activated and / or deactivated targeted to the terminal. Here, the transmission of the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel may follow a first type cell-based transmission configuration.

[0198] (2) Transmission of reference signals and / or control channels for terminal-to-base station communication (e.g., UL communication) of a Type 2 cell (associated with a Type 1 cell)

[0199] For example, a terminal may perform transmission of a terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel targeted to a specific second type cell among second type cell(s) (associated with a first type cell). Here, the specific second type cell may be a second type cell that the terminal desires to activate and / or deactivate. Here, a base station may detect the specific second type cell through the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel, and determine the second type cell(s) (associated with a first type cell) to be activated and / or deactivated for the terminal. Here, transmission of the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel may follow a second type cell-based transmission configuration.

[0200] Here, the terminal-to-base station communication (e.g., UL communication) reference signal may be transmitted in a form in which the (same) signal is repeatedly transmitted in the time domain and / or frequency domain.

[0201] Here, the control channel may be a channel that reports measurement results for the second type cell(s) (associated with the first type cell).

[0202] In a next-generation communication system according to an embodiment of the present disclosure, assuming that a first type cell corresponding to a first coverage and / or a second type cell corresponding to a second coverage are supported, the first type cell may be a cell composed of a plurality of second type cell(s). For example, the first type cell may mean a cell with a wide coverage for servicing relatively highly mobile unmanned aerial vehicle (e.g., UAV) terminal(s), and the second type cell may mean a cell with a narrow coverage for servicing relatively low-mobility pedestrian terminal(s).

[0203] Here, for example, the base station may provide both a first type cell-based service and / or a second type cell-based service (associated with a first type cell) to the unmanned aerial vehicle (e.g., UAV) terminal for the purpose of securing flight stability and efficiency of radio resources. For example, the base station may activate a second type cell(s) that guarantees a certain level of link quality or higher to the terminal, and provide a service based on the cell(s).

[0204] Here, in order for the base station to determine which type 2 cell(s) (associated with the type 1 cell) to activate and / or deactivate for the terminal, it must be able to obtain information about the link quality between the terminal and the type 2 cell(s). Therefore, the present disclosure proposes a method in which the base station transmits a trigger signal according to a type 1 cell-based transmission setting to the terminal (connected to the type 1 cell), and the terminal transmits a terminal-to-base station communication (e.g., UL communication) reference signal and / or a control channel upon receiving the trigger signal.

[0205] Here, for example, the terminal can transmit the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel to a first type cell. For example, the terminal can perform transmission of the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel to a first type cell. Here, the base station can measure and / or receive a report of the reception strength for each second type cell through the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel, and determine the second type cell(s) (associated with the first type cell) to be activated and / or deactivated for the terminal based on the information. Here, transmission of the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel can follow the first type cell-based transmission configuration.

[0206] In another way, for example, the terminal may transmit the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel to a second type cell. For example, the terminal may perform terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel transmission to a specific second type cell among the second type cell(s) (associated with the first type cell). Here, the specific second type cell may be a second type cell that the terminal desires to activate and / or deactivate. Here, the base station may detect the specific second type cell through the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel, and determine the second type cell(s) (associated with the first type cell) to be activated and / or deactivated to the terminal based on the information. Here, the terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel may follow a second type cell-based transmission setup.

[0207] FIGS. 14 and 15 illustrate a terminal transmitting a reference signal for a second type cell associated with a first type cell according to an embodiment of the present disclosure. The embodiments of FIGS. 14 and 15 may be combined with various embodiments of the present disclosure.

[0208] FIG. 14 and FIG. 15 illustrate an operation according to the proposal of the present disclosure, wherein, when a first type cell is composed of a plurality of second type cells, and a terminal accesses a first type cell, the terminal may transmit a terminal-to-base station communication (e.g., UL communication) reference signal and / or a control channel for the purpose of supporting the base station's activation / deactivation decision for a second type cell (within the first type cell). Here, for example, the terminal may assist the base station's (its own) second type cell selection operation by transmitting a terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel to a first type cell, or may directly select a second type cell and then transmit a terminal-to-base station communication (e.g., UL communication) reference signal and / or control channel to the second type cell.

[0209] Referring to FIG. 14, a terminal receiving service from a first type cell may transmit a reference signal to a plurality of second type cells within the first type cell. Here, the reception power value for the reference signal measured by the first cell among the plurality of second type cells may be the highest.

[0210] Referring to FIG. 15, the base station of the first cell can detect the terminal based on the fact that the received power value measured by the first cell is equal to or greater than a threshold value, and the first cell can be activated for the terminal.

[0211] The above [Proposal #07] may be applied in combination with other proposal(s) to the extent that the actions of the disclosure do not conflict.

[0212] According to one embodiment of the present disclosure, the method proposed above can be applied to the device described below. First, the processor (202) of the receiving terminal can set at least one partial bandwidth (e.g., BWP). Then, the processor (202) of the receiving terminal can control the transceiver (206) of the receiving terminal to receive a physical channel (e.g., PSCCH and / or PSSCH) related to terminal-to-terminal communication (e.g., SL communication) and / or a reference signal related to terminal-to-terminal communication (e.g., SL communication) from the transmitting terminal on at least one partial bandwidth (e.g., BWP).

[0213] In the present disclosure, an unmanned aerial vehicle (e.g., UAV) may function as a terminal, and communication technology may need to be applied for operations such as positioning and navigation. In particular, since an unmanned aerial vehicle (e.g., UAV) may operate in the air, and thus may secure line of sight (LOS) with many base stations, a method for determining from which base station the unmanned aerial vehicle (e.g., UAV) will receive service may need to be defined.

[0214] According to one embodiment of the present disclosure, a new type of cell (type 1 cell) composed of a plurality of existing cells (type 2 cells) can be defined, and a device (e.g., an unmanned aerial vehicle) can determine the type of cell to which it will connect by considering its own capabilities, mobility, etc., and attempt a random connection procedure to a cell of the determined type.

[0215] According to various embodiments of the present disclosure, in a situation where there are many base stations securing LOS with a device (e.g., an unmanned aerial vehicle), the complexity of terminal implementation and power saving effects can be achieved by reducing the frequency of handover of the device (e.g., an unmanned aerial vehicle).

[0216] FIG. 16 illustrates a procedure that may be performed by a first device according to an embodiment of the present disclosure. The embodiment of FIG. 16 may be combined with various embodiments of the present disclosure.

[0217] Referring to FIG. 16, in step S1610, the first device can obtain information related to the first device. In step S1620, the first device can determine a cell type to be connected based on the information related to the first device. For example, the cell type may include a first cell type and a second cell type, and a cell of the first cell type may be composed of a plurality of cells of the second cell type. In step S1630, the first device may attempt to randomly connect to a first cell of the determined cell type to be connected.

[0218] For example, the information associated with the first device may include information about the capabilities of the first device or information about the mobility of the first device.

[0219] For example, additionally, the first device may receive, from the base station, information about a first service related to communication to be performed based on a cell of the first cell type and information about a second service related to communication to be performed based on a cell of the second cell type.

[0220] For example, a synchronization signal is used for the random access, and the type of the synchronization signal may differ depending on the determined cell type to be accessed.

[0221] For example, based on the determined cell type to be connected being the first cell type, the synchronization signal may be a primary synchronization signal, and based on the determined cell type to be connected being the second cell type, the synchronization signal may be a secondary synchronization signal.

[0222] For example, additionally, the first device may receive resource information for random access from the base station. For example, the resource information may include information about a first random access resource associated with the first cell type and information about a second random access resource associated with the second cell type.

[0223] For example, the random access may be attempted based on the resource information.

[0224] For example, the first random access resource may have a corresponding relationship with a synchronization signal resource.

[0225] For example, additionally, the first device may receive a synchronization signal; and based on the synchronization signal, obtain first identifier information related to the first cell type and second identifier information related to the second cell type.

[0226] For example, the partial bandwidth associated with the first cell type may be different from the partial bandwidth associated with the second cell type.

[0227] For example, additionally, the first device may receive, from a base station associated with the first cell, a first transmission setting associated with the first cell type and a second transmission setting associated with the second cell type.

[0228] For example, additionally, the first device may receive a trigger signal from the base station based on the first transmission setting; perform reference signal transmission or control channel transmission destined to a cell of the first cell type based on reception of the trigger signal and the first transmission setting; and perform reference signal transmission or control channel transmission destined to a cell of the second cell type based on reception of the trigger signal and the second transmission setting.

[0229] For example, a method related to the above procedure can be performed by the first device.

[0230] The above-described embodiment can be combined with various embodiments of the present disclosure. First, the processor (102) of the first device (100) can obtain information related to the first device (100). Then, the processor (102) of the first device (100) can determine a cell type to be connected based on the information related to the first device (100). For example, the cell type may include a first cell type and a second cell type, and a cell of the first cell type may be composed of a plurality of cells of the second cell type. Then, the processor (102) of the first device (100) can randomly attempt to connect to a first cell of the determined cell type to be connected.

[0231] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on execution by the at least one processor, may cause the first device to: obtain information related to the first device; determine a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempt a random connection to a first cell of the determined cell type to be connected.

[0232] For example, the information associated with the first device may include information about the capabilities of the first device or information about the mobility of the first device.

[0233] For example, additionally, the commands may cause the first device to: receive, from a base station, information about a first service related to communication to be performed based on a cell of the first cell type and information about a second service related to communication to be performed based on a cell of the second cell type.

[0234] For example, a synchronization signal is used for the random access, and the type of the synchronization signal may differ depending on the determined cell type to be accessed.

[0235] For example, based on the determined cell type to be connected being the first cell type, the synchronization signal may be a primary synchronization signal, and based on the determined cell type to be connected being the second cell type, the synchronization signal may be a secondary synchronization signal.

[0236] For example, additionally, the commands may cause the first device to: receive resource information for random access from the base station. For example, the resource information may include information about a first random access resource associated with the first cell type and information about a second random access resource associated with the second cell type.

[0237] For example, the random access may be attempted based on the resource information.

[0238] For example, the first random access resource may have a corresponding relationship with a synchronization signal resource.

[0239] For example, additionally, the commands may cause the first device to: receive a synchronization signal; and obtain first identifier information associated with the first cell type and second identifier information associated with the second cell type based on the synchronization signal.

[0240] For example, the partial bandwidth associated with the first cell type may be different from the partial bandwidth associated with the second cell type.

[0241] For example, additionally, the commands may cause the first device to: receive, from a base station associated with the first cell, a first transmission configuration associated with the first cell type and a second transmission configuration associated with the second cell type.

[0242] For example, additionally, the commands may cause the first device to: receive a trigger signal from the base station based on the first transmission configuration; perform reference signal transmission or control channel transmission destined to a cell of the first cell type based on reception of the trigger signal and the first transmission configuration; and perform reference signal transmission or control channel transmission destined to a cell of the second cell type based on reception of the trigger signal and the second transmission configuration.

[0243] According to one embodiment of the present disclosure, a processing device configured to control a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory coupled to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, may cause the first device to: obtain information related to the first device; determine a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempt a random connection to a first cell of the determined cell type to be connected.

[0244] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium having instructions recorded thereon may be provided. For example, the instructions, when executed, may cause a first device to: obtain information related to the first device; determine a cell type to be connected based on the information related to the first device, wherein the cell type includes a first cell type and a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type; and attempt a random connection to a first cell of the determined cell type to be connected.

[0245] According to one embodiment of the present disclosure, a base station can perform the operations described below.

[0246] For example, a base station may transmit resource information for random access to a first device. For example, the resource information may include information about a first random access resource associated with a first cell type and information about a second random access resource associated with a second cell type, and a cell of the first cell type may be composed of a plurality of cells of the second cell type, and based on the information associated with the first device, a cell type to which the first device will attempt to access among the first cell type and the second cell type may be determined, and random access may be attempted by the first device to a first cell of the determined cell type to which the first device will attempt to access.

[0247] For example, the random access is attempted based on the resource information, and the first random access resource may have a corresponding relationship with a synchronization signal resource.

[0248] The above-described embodiment can be applied to various devices described below. First, the processor (302) of the base station (300) can control the transceiver (306) to transmit resource information for random access to the first device (100). For example, the resource information includes information on a first random access resource related to a first cell type and information on a second random access resource related to a second cell type, and a cell of the first cell type is composed of a plurality of cells of the second cell type, and based on the information related to the first device, a cell type to which the first device will attempt to access among the first cell type and the second cell type is determined, and random access can be attempted by the first device to a first cell of the determined cell type to which the first device will attempt to access.

[0249] According to one embodiment of the present disclosure, a base station may be provided. For example, the base station 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, based on being executed by the at least one processor, cause the base station to: transmit resource information for random access to a first device, wherein the resource information includes information on a first random access resource associated with a first cell type and information on a second random access resource associated with a second cell type, wherein a cell of the first cell type is comprised of a plurality of cells of the second cell type, and based on information associated with the first device, a cell type to which the first device will attempt to access is determined among the first cell type and the second cell type, and the first device may attempt random access to a first cell of the determined cell type to which the first device will attempt to access.

[0250] For example, the random access is attempted based on the resource information, and the first random access resource may have a corresponding relationship with a synchronization signal resource.

[0251] The various embodiments of the present disclosure may be combined with each other.

[0252] Below, a description is given of devices to which various embodiments of the present disclosure can be applied.

[0253] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document may be applied to various fields requiring wireless communication / connectivity (e.g., 5G) between devices.

[0254] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0255] Fig. 17 illustrates a communication system (1) according to one embodiment of the present disclosure. The embodiment of Fig. 17 can be combined with various embodiments of the present disclosure.

[0256] Referring to FIG. 17, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and / or an Aerial Vehicle (AV) (e.g., an Advanced Air Mobility (AAM)). The XR device may include an Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) device, and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. The portable device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc. The home appliance may include a TV, a refrigerator, a washing machine, etc. The IoT device may include a sensor, a smart meter, etc. For example, a base station and a network may also be implemented as a wireless device, and a specific wireless device (200a) may operate as a base station / network node to other wireless devices.

[0257] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented with standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may perform communication based on LTE-M technology. At this time, for example, LTE-M technology may be an example of LPWAN technology, and may be called by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology can be implemented by at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification can include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-described names. For example, ZigBee technology can create personal area networks (PAN) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

[0258] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0259] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or, D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present disclosure.

[0260] FIG. 18 illustrates a wireless device according to an embodiment of the present disclosure. The embodiment of FIG. 18 may be combined with various embodiments of the present disclosure.

[0261] Referring to FIG. 18, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 17.

[0262] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). Furthermore, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0263] A second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). In addition, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0264] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0265] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0266] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0267] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0268] FIG. 19 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure. The embodiment of FIG. 19 may be combined with various embodiments of the present disclosure.

[0269] Referring to FIG. 19, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Although not limited thereto, the operations / functions of FIG. 19 may be performed in the processor (102, 202) and / or the transceiver (106, 206) of FIG. 18. The hardware elements of FIG. 19 may be implemented in the processor (102, 202) and / or the transceiver (106, 206) of FIG. 18. For example, blocks 1010 to 1060 may be implemented in the processor (102, 202) of FIG. 18. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 18, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 18.

[0270] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 19. Here, the codeword is an encoded bit sequence of an information block. The information block can include a transport block (e.g., an UL-SCH transport block, a DL-SCH transport block). The wireless signal can be transmitted through various physical channels (e.g., a PUSCH or a PDSCH).

[0271] Specifically, the codeword can be converted into a bit sequence scrambled by a scrambler (1010). The scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of the wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020). The modulation method may include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding). The output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by a precoding matrix W of N*M. Here, N is the number of antenna ports, and M is the number of transmission layers. Here, the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on complex modulation symbols. In addition, the precoder (1040) can perform precoding without performing transform precoding.

[0272] The resource mapper (1050) can map modulation symbols of each antenna port to time-frequency resources. The time-frequency resources can include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. The signal generator (1060) generates a wireless signal from the mapped modulation symbols, and the generated wireless signal can be transmitted to another device through each antenna. To this end, the signal generator (1060) can include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0273] The signal processing process for receiving signals in a wireless device can be configured in reverse order of the signal processing process (1010 to 1060) of FIG. 19. For example, a wireless device (e.g., 100, 200 of FIG. 18) can receive wireless signals from the outside through an antenna port / transceiver. The received wireless signals can be converted into baseband signals through a signal restorer. For this purpose, the signal restorer can include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Thereafter, the baseband signal can be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descrambling process. The codewords can be restored to the original information blocks through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0274] FIG. 20 illustrates a wireless device according to an embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use case / service (see FIG. 17). The embodiment of FIG. 20 may be combined with various embodiments of the present disclosure.

[0275] Referring to FIG. 20, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 18 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and an additional element (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 18. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 18. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0276] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 17, 100a), a vehicle (Fig. 17, 100b-1, 100b-2), an XR device (Fig. 17, 100c), a portable device (Fig. 17, 100d), a home appliance (Fig. 17, 100e), an IoT device (Fig. 17, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 17, 400), a base station (Fig. 17, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0277] In FIG. 20, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and the first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of one or more processor sets. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0278] Below, the implementation example of Fig. 20 is described in more detail with reference to the drawings.

[0279] FIG. 21 illustrates a mobile device according to an embodiment of the present disclosure. The mobile device may include a smartphone, a smart pad, a wearable device (e.g., a smartwatch, smartglasses), or a portable computer (e.g., a laptop, etc.). The mobile device may be referred to as a Mobile Station (MS), a User Terminal (UT), a Mobile Subscriber Station (MSS), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or a Wireless Terminal (WT). The embodiment of FIG. 21 may be combined with various embodiments of the present disclosure.

[0280] Referring to FIG. 21, the portable device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b), and an input / output unit (140c). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130 / 140 of FIG. 20, respectively.

[0281] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (120) can control components of the mobile device (100) to perform various operations. The control unit (120) can include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / codes / commands required for operating the mobile device (100). In addition, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the mobile device (100) and can include a wired / wireless charging circuit, a battery, etc. The interface unit (140b) can support connection between the mobile device (100) and other external devices. The interface unit (140b) can include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can input or output video information / signals, audio information / signals, data, and / or information input from a user. The input / output unit (140c) may include a camera, a microphone, a user input unit, a display unit (140d), a speaker, and / or a haptic module.

[0282] For example, in the case of data communication, the input / output unit (140c) obtains information / signals (e.g., touch, text, voice, image, video) input by the user, and the obtained information / signals can be stored in the memory unit (130). The communication unit (110) converts the information / signals stored in the memory into wireless signals, and can directly transmit the converted wireless signals to other wireless devices or to a base station. In addition, the communication unit (110) can receive wireless signals from other wireless devices or base stations, and then restore the received wireless signals to the original information / signals. The restored information / signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (140c).

[0283] Figure 22 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like. The embodiment of Figure 22 may be combined with various embodiments of the present disclosure.

[0284] Referring to FIG. 22, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 20, respectively.

[0285] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a battery, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0286] For example, the communication unit (110) can receive map data, traffic information data, etc. from an external server. The autonomous driving unit (140d) can generate an autonomous driving route and driving plan based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0287] The claims set forth in this specification may be combined in various ways. For example, the technical features of the method claims of this specification may be combined and implemented as a device, and the technical features of the device claims of this specification may be combined and implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a device, and the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a method.

Claims

1. In the method, A step of obtaining information related to a first device; Based on the information related to the first device, determine the cell type to connect to, The above cell types include a first cell type and a second cell type, and A step in which the cell of the first cell type is composed of a plurality of cells of the second cell type; and A method comprising the step of attempting a random connection to a first cell of the cell type to be connected, determined above.

2. In paragraph 1, A method wherein the information related to the first device is information about the capabilities of the first device.

3. In paragraph 1, A method wherein the information related to the first device is information about the mobility of the first device.

4. In paragraph 1, A method wherein the coverage of the cell of the first cell type is wider than the coverage of the cell of the second cell type.

5. In paragraph 1, A synchronization signal is used for the above random access, and The type of the above synchronization signal is different depending on the type of cell to be connected, which is determined above.

6. In paragraph 5, Based on the above-determined cell type to be connected being the first cell type, the synchronization signal is a primary synchronization signal, and A method wherein the synchronization signal is a sub-synchronization signal based on the determined cell type to be connected being the second cell type.

7. In paragraph 1, Further comprising a step of receiving resource information for random access from a base station, A method wherein the resource information includes information about a first random access resource associated with the first cell type and information about a second random access resource associated with the second cell type.

8. In paragraph 7, A method in which the above random access is attempted based on the above resource information.

9. In paragraph 7, A method wherein the first random access resource has a corresponding relationship with a synchronization signal resource.

10. In paragraph 1, a step of receiving a synchronization signal; and A method further comprising the step of obtaining first identifier information related to the first cell type and second identifier information related to the second cell type based on the synchronization signal.

11. In paragraph 1, A method wherein the partial bandwidth associated with the first cell type is different from the partial bandwidth associated with the second cell type.

12. In paragraph 1, A method further comprising the step of receiving, from a base station associated with the first cell, a first transmission setting associated with the first cell type and a second transmission setting associated with the second cell type.

13. In paragraph 1, A method, wherein the method is performed by the first device.

14. In the first device, At least one transmitter / receiver; at least one processor; and At least one memory connected to the at least one processor and storing instructions, The above instructions, based on being executed by the at least one processor, cause the first device to: Obtain information related to the first device; Based on the information related to the first device, determine the cell type to be connected, The above cell types include a first cell type and a second cell type, and The cell of the first cell type is composed of a plurality of cells of the second cell type; and A first device that attempts to randomly connect to a first cell of the cell type to be connected, as determined above.

15. In a processing device set to control the first device, at least one processor; and At least one memory connected to the at least one processor and storing instructions, The above instructions, based on being executed by the at least one processor, cause the first device to: Obtain information related to the first device; Based on the information related to the first device, determine the cell type to be connected, The above cell types include a first cell type and a second cell type, and The cell of the first cell type is composed of a plurality of cells of the second cell type; and A processing device that attempts to randomly connect to a first cell of the cell type to be connected, as determined above.

16. A non-transitory computer-readable storage medium that records commands, The above commands, when executed, cause the first device to: Obtain information related to the first device; Based on the information related to the first device, determine the cell type to be connected, The above cell types include a first cell type and a second cell type, and The cell of the first cell type is composed of a plurality of cells of the second cell type; and A non-transitory computer-readable storage medium that causes a random connection to be attempted to a first cell of the cell type to be connected, as determined above.

17. In the method, Including a step of transmitting resource information for random access to the first device, The above resource information includes information about a first random access resource associated with a first cell type and information about a second random access resource associated with a second cell type, The cell of the first cell type is composed of a plurality of cells of the second cell type, Based on the information related to the first device, a cell type to which the first device will attempt to connect among the first cell type and the second cell type is determined, and A method in which a random connection is attempted by the first device to a first cell of the cell type to which the first device is to attempt connection, as determined above.

18. In paragraph 17, The above random access is attempted based on the above resource information, and A method wherein the first random access resource has a corresponding relationship with a synchronization signal resource.

19. At the base station, At least one transmitter / receiver; at least one processor; and At least one memory connected to the at least one processor and storing instructions, The above commands are based on being executed by the at least one processor, causing the base station to: To transmit resource information for random access to the first device, The above resource information includes information about a first random access resource associated with a first cell type and information about a second random access resource associated with a second cell type, The cell of the first cell type is composed of a plurality of cells of the second cell type, Based on the information related to the first device, a cell type to which the first device will attempt to connect among the first cell type and the second cell type is determined, and A base station, wherein a random connection is attempted by the first device to a first cell of the cell type to which the first device is to attempt connection, as determined above.

20. In paragraph 19, The above random access is attempted based on the above resource information, and A base station, wherein the first random access resource has a corresponding relationship with a synchronization signal resource.

Images