Method and device for performing access in non-terrestrial network

Abstract

A first device may transmit, to a second device, a first message including a contention resolution identifier on the basis of a first grant, and / or the first device may receive, from the second device, a second message including the contention resolution identifier, a temporary cell-radio network temporary identifier (TC-RNTI), and a second grant.

Description

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

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

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

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

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

[0005] According to one embodiment of the present disclosure, a method may be provided. For example, the method may include at least one of: a first device transmitting a first message to a second device comprising a competition resolution identifier based on a first grant; and / or the first device receiving a second message from the second device comprising a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0006] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: transmitting a first message containing a contention resolution identifier to a second device based on a first grant; and / or receiving a second message from the second device containing a contention resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0007] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause a first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: transmitting a first message containing a contention resolution identifier to a second device based on a first grant; and / or receiving a second message from the second device containing a contention resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0008] According to one embodiment of the present disclosure, a non-temporary computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a first device to perform an operation based on execution. For example, the operation may include at least one of: transmitting a first message containing a race resolution identifier to a second device based on a first grant; and / or receiving a second message from the second device containing a race resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

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

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

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

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

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

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

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

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

[0017] FIG. 10 shows an example of a common TA (timing advance) and a terminal-specific TA according to an embodiment of the present disclosure.

[0018] FIG. 11 is K according to one embodiment of the present disclosure. offset and K mac It represents an example of one.

[0019] FIG. 12 shows an example of an orbital parameter orbital format according to one embodiment of the present disclosure.

[0020] FIG. 13 illustrates a procedure performed by a first device according to one embodiment of the present disclosure.

[0021] FIG. 14 illustrates a procedure performed by a second device according to one embodiment of the present disclosure.

[0022] FIG. 15 shows a communication system (1) according to one embodiment of the present disclosure.

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

[0024] FIG. 17 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0025] FIG. 18 shows a wireless device according to one embodiment of the present disclosure.

[0026] FIG. 19 shows a portable device according to one embodiment of the present disclosure.

[0027] In the present disclosure, "A or B" may mean "only A," "only B," or "both A and B." Alternatively, in the present disclosure, "A or B" may be interpreted as "A and / or B." For example, in the present disclosure, "A, B or C" may mean "only A," "only B," "only C," or "any combination of A, B and C."

[0028] A slash ( / ) or a comma used in the present disclosure may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B or C."

[0029] In the present disclosure, "at least one of A and B" may mean "only A," "only B," or "both A and B." Additionally, in the present disclosure, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted as synonymous with "at least one of A and B."

[0030] Additionally, in the present disclosure, "at least one of A, B and C" may mean "only A," "only B," "only C," or "any combination of A, B and C." Additionally, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B and C."

[0031] Additionally, parentheses used in the present disclosure may mean "for example." Specifically, when indicated as "control information (PDCCH)," "PDCCH" may be proposed as an example of "control information." In other words, the "control information" of the present disclosure is not limited to "PDCCH," and "PDCCH" may be proposed as an example of "control information." Furthermore, even when indicated as "control information (i.e., PDCCH)," "PDCCH" may be proposed as an example of "control information."

[0032] In the following explanation, 'when, if, in case of' can be replaced with 'based on'.

[0033] Technical features described individually within one drawing in this disclosure may be implemented individually or simultaneously.

[0034] In the present disclosure, a higher layer parameter may be a parameter that is set for the terminal, pre-set, or pre-defined. For example, a base station or a network may transmit the higher layer parameter to the terminal. For example, the higher layer parameter may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0035] In the present disclosure, "configured or defined" may be interpreted as being configured or pre-configured to a device through pre-defined signaling from a base station or network (e.g., SIB, MAC, RRC, DCI (downlink control information), etc.). In the present disclosure, "configured or defined" may be interpreted as being configured or pre-configured to a device through pre-defined signaling from another device (e.g., MAC, RRC, SCI (sidelink control information), control information signaled between devices, etc.). In the present disclosure, "configured or defined" may be interpreted as being pre-configured to a device.

[0036] In the present disclosure, user equipment (UE) may refer to a device, a portable device, a wireless device, etc. In the present disclosure, a base station (BS) may refer to a radio access network (RAN) node, a non-terrestrial network (NTN) cell / node, a transmission reception point (TRP), a network, an integrated access and backhaul (IAB) node, a device, a portable device, a wireless device, etc.

[0037] The technology proposed in this disclosure can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented with wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0038] The technology proposed in this disclosure can be implemented as 6G wireless technology and can be applied to various 6G systems. For example, 6G systems may have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0039] FIG. 1 illustrates a communication procedure between devices according to one embodiment of the present disclosure. The embodiment of FIG. 1 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0040] Referring to FIG. 1, in step S101, the first device and the second device can perform synchronization. For example, the first device may be a terminal and / or at least one of the devices proposed in the present disclosure. For example, the second device may be a base station, a network, a RAN node, an NTN node / cell, a TRP, a terminal and / or at least one of the devices proposed in the present disclosure. For example, the first device may perform an initial cell search operation. For example, the first device may detect at least one synchronization signal transmitted according to a rule predefined by the second device. Here, for example, the synchronization signal may include a plurality of synchronization signals (e.g., primary synchronization signal, secondary synchronization signal, etc.) classified according to structure or use. Through this, the first device can identify the boundaries of the frame, subframe, time unit, slot, and / or symbol of the second device, and the first device can obtain information about the second device (e.g., cell identifier).

[0041] In step S103, the first device may obtain system information transmitted by the second device. For example, the system information may include information related to the attributes, characteristics, and / or capabilities of the second device that are necessary to connect to the second device and use the service. For example, the system information may be classified according to content (e.g., whether it is essential for connection), transmission structure (e.g., the channel used, whether it is provided on-demand), etc. For example, the system information may be classified into a master information block (MIB) and a system information block (SIB). For example, if necessary, the first device may transmit a signal requesting the system information prior to receiving the system information. For example, the request and provision of the system information may be performed after a random access procedure described later.

[0042] In step S105, the first device and the second device may perform a random access procedure. For example, the first device may transmit and / or receive at least one message for the random access procedure (e.g., random access preamble, random access response message, etc.) based on information related to the random access channel of the second device obtained through system information (e.g., channel location, channel structure, structure of supported preamble, etc.). For example, the first device may transmit a preamble (e.g., Msg1) through the random access channel, and the first device may receive a random access response message (e.g., Msg2). The first device may transmit a message (e.g., Msg3) containing information related to the first device (e.g., identification information) to the second device using scheduling information included in the random access response message, and the first device may receive a message (e.g., Msg4) for contention resolution and / or connection establishment. For example, Msg1 and Msg3 can be transmitted and received as a single message (e.g., MsgA), and / or Msg2 and Msg4 can be transmitted and received as a single message (e.g., MsgB).

[0043] In step S107, the first device and the second device may perform signaling of control information. Here, for example, the control information may be defined in various layers, such as a layer controlling the connection (e.g., a radio resource control (RRC) layer), a layer handling mapping between a logical channel and a transmission channel (e.g., a media access control (MAC) layer), and a layer handling a physical channel (e.g., a physical (PHY) layer). For example, the first device and the second device may perform at least one of signaling to establish a connection, signaling to determine settings related to communication, and / or signaling to indicate allocated resources. For example, the control information may be signaled / transmitted through a control channel. For example, the control information and / or the control channel may be used to schedule at least one of data, a data channel (e.g., a shared channel), and / or control information on the data channel.

[0044] In step S109, the first device and the second device may transmit and / or receive data. For example, the first device and the second device may process data based on signaling of control information and transmit and / or receive it. For example, when transmitting data, the first device or the second device may perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and / or resource mapping on the information bits. For example, when receiving data, the first device or the second device may perform at least one of signal extraction from resources, antenna-specific waveform demodulation, signal placement considering layer mapping, constellation demapping, descrambling, and / or channel decoding.

[0045] For example, the layers of the radio interface protocol between the first device and the second device can be classified into L1 (layer 1), L2 (layer 2), L3 (layer 3), etc. For example, the physical layer belonging to layer 1 can provide an information transfer service using a physical channel, and the radio resource control (RRC) layer located at layer 3 can perform the role of controlling radio resources between the first device and the second device. To this end, for example, the RRC layer can exchange RRC messages between the first device and the second device.

[0046] FIG. 2 illustrates a radio protocol architecture according to one embodiment of the present disclosure. The embodiment of FIG. 2 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of said embodiment may be omitted. For example, FIG. 2(a) may represent a radio protocol stack in the user plane for uplink communication or downlink communication, and FIG. 2(b) may represent a radio protocol stack in the control plane for uplink communication or downlink communication. For example, FIG. 2(c) may represent a radio protocol stack in the user plane for device-to-device communication, and FIG. 2(d) may represent a radio protocol stack in the control plane for device-to-device communication.

[0047] For example, the physical layer can provide information transmission services to upper layers using a physical channel. For example, the physical layer can be connected to the upper layer, the MAC (medium access control) layer, through a transport channel. For example, data can be transmitted between the MAC layer and the physical layer through a transport channel. For example, transport channels can be classified according to how and with what characteristics data is transmitted through a wireless interface. For example, data can be transmitted through a physical channel between different physical layers, e.g., between the physical layers of a first device and a second device. For example, the physical channel can be modulated using the OFDM (orthogonal frequency division multiplexing) method, and time and frequency can be utilized as wireless resources.

[0048] For example, the MAC layer can provide services to the upper layer, the RLC (radio link control) layer, through logical channels. For example, the MAC layer can provide mapping functions from multiple logical channels to multiple transmission channels. For example, the MAC layer can provide logical channel multiplexing functions through mapping from multiple logical channels to a single transmission channel. For example, the MAC sublayer can provide data transmission services over logical channels.

[0049] For example, the RLC layer can perform concatenation, segmentation, and reassembly of RLC service data units (SDUs). For example, to guarantee various quality of service (QoS) required by a radio bearer (RB), the RLC layer can provide three modes of operation: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). For example, AM RLC can provide error correction through automatic repeat requests (ARQ).

[0050] For example, the RRC (radio resource control) layer may be defined only in the control plane. For example, the RRC layer may be responsible for controlling logical channels, transmission channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. For example, RB may refer to a logical path provided by the first layer (e.g., physical layer) and the second layer (e.g., MAC layer, RLC layer, PDCP (packet data convergence protocol) layer, SDAP (service data adaptation protocol) layer, etc.) for data transfer between a first device and a second device.

[0051] For example, the functions of the PDCP layer in the user plane may include the delivery of user data, header compression, and ciphering. For example, the functions of the PDCP layer in the control plane may include the delivery of control plane data and encryption / integrity protection.

[0052] For example, the establishment of an RB can mean the process of defining the characteristics of the wireless protocol layer and channel to provide specific services, and setting each specific parameter and method of operation. For example, an RB can be divided into two types: an SRB (signaling radio bearer) and a DRB (data radio bearer). For example, an SRB can be used as a channel to transmit RRC messages in the control plane, and a DRB can be used as a channel to transmit user data in the user plane.

[0053] For example, a downlink transmission channel may include at least one of a broadcast channel (BCH) that transmits system information and / or a shared channel (SCH) that transmits user traffic or control messages. For example, traffic or control messages for a downlink multicast or broadcast service may be transmitted via a downlink SCH or via a separate multicast channel (MCH). Meanwhile, an uplink transmission channel may include at least one of a random access channel (RACH) that transmits initial control messages and / or a shared channel (SCH) that transmits user traffic or control messages. For example, a logical channel located above the transmission channel and mapped to the transmission channel may include at least one of a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and / or a multicast traffic channel (MTCH).

[0054] FIG. 3 shows the structure of a wireless frame according to one embodiment of the present disclosure. The embodiment of FIG. 3 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0055] Referring to FIG. 3, radio frames may be used, for example, in uplink transmission, downlink transmission, and / or device-to-device transmission. For example, a radio frame may have a length of 10 ms and may be defined as two 5 ms half-frames (HF). For example, a half-frame may contain five 1 ms subframes (SF). For example, a subframe may be divided into one or more slots, and the number of slots within a subframe may be determined by subcarrier spacing (SCS). For example, each slot may contain 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

[0056] For example, when normal CP is used, each slot may contain 14 symbols. For example, when extended CP is used, each slot may contain 12 symbols. Here, for example, the symbols may include OFDM symbols (or CP-OFDM symbols) and SC-FDMA (single carrier-FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0057] Table 2 below shows the number of symbols per slot (N) according to the SCS setting (u) when Normal CP or Extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot) exemplifies.

[0058] CP Type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slot Normal CP 15kHz (u=0) 1410 130kHz (u=1) 1420 260kHz (u=2) 1440 4120kHz (u=3) 1480 8240kHz (u=4) 14160 16 Extended CP 60kHz (u=2) 1240 4

[0059] For example, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be configured differently among multiple cells merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., subframe, slot, or TTI (transmit time interval)) composed of the same number of symbols may be configured differently among the merged cells. For example, in the present disclosure, time resources such as subframes, slots, TTI, etc. may be referred to as time units.

[0060] For example, multiple numerologies or SCSs may be supported to support various services. For example, if the SCS is 15 kHz, a wide area in traditional cellular bands may be supported, and if the SCS is 30 kHz / 60 kHz, dense-urban, lower latency, and wider carrier bandwidth may be supported. For example, if the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.

[0061] FIG. 4 shows a slot structure of a frame according to one embodiment of the present disclosure. The embodiment of FIG. 4 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0062] Referring to FIG. 4, for example, a slot may include multiple symbols in the time domain. For example, a carrier may include multiple subcarriers in the frequency domain. For example, a resource block (RB) may be defined as multiple consecutive subcarriers in the frequency domain. For example, a bandwidth part (BWP) may be defined as multiple consecutive (P)RBs ((physical) resource blocks) in the frequency domain and may correspond to a single numerology (e.g., SCS, CP length, etc.). For example, a carrier may include up to N BWPs (where N is a positive integer). For example, data communication may be performed through an active BWP. For example, each element may be referred to as a resource element (RE) in a resource grid and may be mapped to a single complex symbol.

[0063] For example, a BWP can be a continuous set of PRBs in a given numerology. For example, a PRB can be selected from a continuous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0064] For example, the BWP may be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, the terminal may not monitor downlink radio link quality on DL BWPs other than the active DL BWP on the PCell (primary cell). For example, the terminal may not receive PDCCH (physical downlink control channel), PDSCH (physical downlink shared channel), or CSI-RS (channel state information-reference signal) (except for RRM (radio resource management)) outside of the active DL BWP. For example, the terminal may not trigger CSI (channel state information) reporting for an inactive DL BWP. For example, the terminal may not transmit PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel) outside of the active UL (uplink) BWP. For example, for the downlink, the initial BWP can be given as a consecutive set of resource blocks (RBs) for the remaining minimum system information (RMSI) CORESET (control resource set) (set by the physical broadcast channel (PBCH)). For example, for the uplink, the initial BWP can be given by the system information block (SIB) for the random access procedure. For example, the default BWP can be set by the upper layer. For example, the initial value of the default BWP can be the initial DL BWP.For energy saving, if the terminal fails to detect DCI (downlink control information) for a certain period, the terminal can switch the active BWP of the terminal to the default BWP.

[0065] FIG. 5 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 5 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted. In the embodiment of FIG. 5, it is assumed that there are three BWPs.

[0066] Referring to FIG. 5, for example, a common resource block (CRB) may be a numbered carrier resource block from one end of the carrier band to the other, and a PRB may be a numbered resource block within each BWP. For example, point A may indicate a common reference point for the resource block grid.

[0067] For example, BWP is point A, offset from point A (N start BWP ) and bandwidth (N size BWP It can be set by ). For example, point A may be an external reference point of the PRB of a carrier where the subcarrier 0 of all numerologies (e.g., all numerologies supported by the network in that carrier) are aligned. For example, offset may be the PRB interval between the lowest subcarrier in a given numerology and point A. For example, bandwidth may be the number of PRBs in a given numerology.

[0068] FIG. 6 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of FIG. 6 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of said embodiments may be omitted.

[0069] As core implementation technologies for 6G systems, technologies such as artificial intelligence (AI), THz (Terahertz) communication, optical wireless technology, free space optical transmission (FSO) backhaul networks, large-scale MIMO (multiple input multiple output) technology, blockchain, 3D networking, quantum communication, unmanned aerial vehicles, cell-free communication, wireless information and energy transfer (WIET), integration of sensing and communication, integration of access backhaul networks, holographic beamforming, big data analysis, and large intelligent surface (LIS) can be adopted.

[0070] - Artificial Intelligence: Introducing AI into communications can streamline and enhance real-time data transmission. AI can determine how complex target tasks are performed using numerous analyses. For example, AI can increase efficiency and reduce processing latency. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communication. Furthermore, AI can enable rapid communication in Brain-Computer Interfaces (BCI). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0071] - THz Communication: Data transmission rates can be increased by expanding bandwidth. This can be achieved by using sub-THz communication with wide bandwidth and applying advanced large-scale MIMO technology. THz waves, also known as sub-millimeter radiation, generally refer to a frequency band between 0.1 THz and 10 THz with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz-300 GHz band range (Sub-THz band) is considered the primary portion of the THz band for cellular communication. Adding the Sub-THz band to the mmWave band increases 6G cellular communication capacity. Among the defined THz bands, the 300 GHz-3 THz band is located in the far-infrared (IR) frequency band. Although the 300 GHz-3 THz band is part of the optical band, it lies at the boundary of the optical band and immediately following the RF band. Therefore, this 300 GHz-3 THz band exhibits similarities to RF. Key characteristics of THz communication include (i) widely available bandwidth to support very high data transmission rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are indispensable). The narrow beam width generated by highly directional antennas reduces interference. The small wavelength of THz signals allows a much larger number of antenna elements to be integrated into devices and BSs operating in this band. This enables the use of advanced adaptive array technologies that can overcome range limitations.

[0072] - Large-scale MIMO technology

[0073] - Hologram beamforming (HBF)

[0074] - Optical wireless technology

[0075] - Free Space Optical Transmission Backhaul Network (FSO backhaul network)

[0076] - Quantum communication

[0077] - Cell-free communication

[0078] - Integration of wireless information and power transmission

[0079] - Integration of wireless communication and sensing

[0080] - Integrated access and backhaul network

[0081] - Big data analysis

[0082] - Reconfigurable intelligent metasurface

[0083] - Metaverse

[0084] - blockchain

[0085] - Advanced Air Mobility (AAM): AAM can be a broad concept encompassing Urban Air Mobility (UAM), Regional Air Mobility (RAM), and Uncrewed Aerial Systems (UAS). For example, AAM may include UAM, RAM, UAS, and UAVs (uncrewed aerial vehicles).

[0086] - Autonomous driving (self-driving): V2X (vehicle to everything), a core element of building autonomous driving infrastructure, refers to technologies that enable vehicles to communicate and share with various elements on the road to perform autonomous driving, such as wireless communication between vehicles (vehicle to vehicle, V2V) and between vehicles and infrastructure (vehicle to infrastructure, V2I).

[0087] - Non-terrestrial Network (NTN): An NTN may refer to a network or network segment that utilizes RF (radio frequency) resources mounted on a satellite (or UAS platform). The use of NTN services may be considered to secure wider coverage or to provide wireless communication services in locations where the installation of wireless communication base stations is difficult.

[0088] - 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.

[0089] - Reconfigurable Intelligent Surface (RIS): An RIS can be used to manipulate and enhance signal propagation in a wireless communication environment. For example, an RIS can be composed of many small antennas or metasurfaces arranged on a surface, each of which can actively control the phase, amplitude, polarization, etc., of the reflected signal. For instance, an RIS can improve signal reception by controlling the path, phase, and / or strength of the propagating signal. For instance, power consumption can be very low because power is consumed only for controlling the phase and amplitude of the small antennas. For instance, since an RIS can be reconfigured to suit various environments, it can meet diverse communication requirements and operate effectively in dynamic network environments.

[0090] FIG. 7 illustrates an example of a communication scenario based on a 6G system according to an embodiment of the present disclosure. The embodiment of FIG. 7 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0091] Referring to FIG. 7, NTN communication can be performed based on a satellite network, HIBS (high-altitude platform stations (HAPS) as international mobile telecommunications (IMT) base stations (BS)), and an aeronautical communication-capable terminal (e.g., AAM). For example, to improve coverage, devices such as a satellite network, HIBS, and an aeronautical communication-capable terminal (e.g., AAM) can act as relays. For example, an AAM can communicate with a base station, a satellite network, etc., and / or an AAM can communicate directly with a terminal, another AAM, etc.

[0092] FIGS. 8 and 9 illustrate a non-terrestrial network scenario according to one embodiment of the present disclosure. The embodiment of FIGS. 8 and 9 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiment may be omitted.

[0093] FIG. 8 illustrates a non-terrestrial network scenario based on a transparent payload, and FIG. 9 illustrates a non-terrestrial network scenario based on a regenerative payload. For example, a non-terrestrial network may generally include the following elements.

[0094] - One or more satellite gateways connecting non-terrestrial networks to public data networks

[0095] - Feeder link or wireless link between the satellite gateway and the satellite (or UAS platform)

[0096] - Service link or wireless link between user equipment and satellite (or UAS platform)

[0097] - A satellite (or UAS platform) capable of implementing transparent or regenerated (including onboard processing) payloads. For example, the satellite (or UAS platform) can generate multiple beams across a given service area, typically defined by a line of sight. For example, the beam footprint may typically be elliptical. For example, the line of sight of the satellite (or UAS platform) may vary depending on the onboard antenna diagram and the minimum elevation angle. For example, for a transparent payload, radio frequency filtering, frequency conversion, and amplification may be performed. Thus, the repeating waveform signal in the payload may not be altered. For example, for a regenerated payload, radio frequency filtering, frequency conversion, and amplification, as well as demodulation / decoding, switching and / or routing, and coding / modulation may be performed. This can effectively be equivalent to equipping the satellite (or UAS platform) with all base station functions.

[0098] - Optionally, Inter-satellite Link (ISL)

[0099] - User equipment can be serviced by a satellite (or UAS platform) within the target service area.

[0100] FIG. 10 illustrates an example of a common TA (timing advance) and a terminal-specific TA according to an embodiment of the present disclosure. The embodiment of FIG. 10 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0101] Referring to FIG. 10, a terminal-specific TA can be acquired to compensate for transmission delays on the service link, and a common TA can be acquired to compensate for transmission delays between the RP (reference point) and the satellite.

[0102] For example, in an NTN-based communication system, the terminal can calculate the TA based on the terminal's GNSS (global navigation satellite system) capabilities (e.g., terminal location) and orbit-related upper-layer parameters transmitted from the base station, and this is the terminal-specific TA (N UE TA,adj It can be referred to as ). For example, if orbit-related upper-layer parameters are not received from the base station, the terminal-specific TA may be set to 0. For example, a TA obtained based on common TA parameters (e.g., TACommon, TACommonDrift, and / or TACommonDriftVariation), which are upper-layer parameters transmitted from the base station, is called the common TA(N common TA,adj It can be referred to as ). For example, if common TA parameters are not transmitted from the base station, the common TA can be set to 0. Accordingly, for example, in an NTN-based communication system, the total TA value (T TA ) is "(N TA + N TA,offset + N common TA,adj + N UE TA,adj )*T c It can be obtained as. For example, N TA,offset can refer to the TA offset value provided to the terminal per serving cell, and N TA can mean a value obtained based on the timing advance command.

[0103] Meanwhile, in order to effectively operate NTNs with very long RTT (round trip time), the scheduling offset K offset and K mac This can be considered.

[0104] FIG. 11 is K according to one embodiment of the present disclosure. offset and K macAn example of the above is shown. The embodiment of FIG. 11 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0105] Referring to Fig. 11, K offset may be an offset value representing the RTT between the RP (e.g., uplink time synchronization reference point) and the terminal. For example, K offset can mean the sum of the RTT for the service link and (if indicated) the common TA. For example, K mac can be an offset value representing the RTT between the RP and the base station.

[0106] For example, the terminal may receive satellite orbit information through system information and / or RRC signaling. For example, satellite orbit information may be implemented / supported in a position and velocity state vector orbit format and / or an orbital parameter orbit format. For example, the position and velocity state vector orbit format may be composed of less than 17 bytes (e.g., 132 bits). For example, the field size for position (x, y, z)(m) may be 78 bits, and the field size for velocity (vx, vy, vz)(m / s) may be 54 bits. For example, the orbital parameter orbit format may be composed of less than 21 bytes (e.g., 164 bits).

[0107] FIG. 12 illustrates an example of an orbital parameter orbital format according to one embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiments may be omitted.

[0108] Referring to Fig. 12, information related to the orbital parameter orbit format (e.g., ephemeral information) includes the semi-major axis "α" (e.g., 33 bits) [m], the eccentricity "e" (in an elliptical satellite orbit, 0 <e<1) (예, 20 비트), 근점 편각(argument of periapsis) "ω"(예, 28 비트) [rad], 승교점 경도(longitude of ascending node) "Ω" (예, 28 비트) [rad], (궤도) 경사(inclination) "i" (예, 27 비트) [rad], 및 / 또는 평균 근점 이각(mean anomaly) "M0" = 에포크 t0 [JD]에서 M(t0) (예, 28 비트) [rad] 중 적어도 어느 하나를 포함할 수 있다.

[0109] Meanwhile, the next-generation system may be configured to be integrated between the terrestrial network (TN) and the non-terrestrial network (NTN), and in the above situation, the distinction between TN and NTN may not be explicit. Meanwhile, if the terminal is distinguished as either TN or NTN, or classified into a corresponding category, an optimized operation suitable for each can be performed.

[0110] Combinations of various embodiments of the present disclosure may be applied differently depending on the payload type of the satellite (e.g., regenerative payload or transparent payload).

[0111] Combinations of various embodiments of the present disclosure may be applied differently to the type of non-geostational network node (e.g., GEO (geostationary earth orbit), NGEO (non-geostationary earth orbit), LEO (low earth orbit), MEO (medium earth orbit), HASP (high altitude satellite platform), drone) or altitude or fixed beam footprint or cell-moving beam footprint.

[0112] Meanwhile, in the case of the NTN communication method, the terminal may transmit a signal for initial access (e.g., PRACH (physical random access channel)) to the base station after applying a timing advance (TA) or adjustment (TA) based on the location and location change information of the NTN node, such as ephemeris information, and / or the location of the terminal. For example, if the TA is compensated in advance based on ephemeris information, the requirements for RTT detection / estimation may be relaxed when designing the initial access signal, and / or the process may proceed in a direction that minimizes resource and / or preamble collisions between different terminals and / or simplifies the initial access process.

[0113] Meanwhile, in the case of NTN communication methods, the number of (maximum) terminals that can exist within a cell or beam footprint may be larger as the coverage is relatively larger compared to TN. In the above situation, signal and resource conflicts for initial connection between different terminals may occur frequently.

[0114] Meanwhile, in the random access procedure, different terminals may select the same initial access signal (hereinafter referred to as the PRACH (physical random access channel) resource) for an NTN node or a base station node. In this case, due to a conflict in the PRACH resource, different terminals may receive the same RAR (random access response) message, and different terminals may transmit Msg3 (response to RAR) again from the same resource, and the transmission of Msg3 at the base station node may conflict with each other. The base station node may resolve contention by including the contention resolution ID included in the Msg3 transmitted by the different terminal in Msg4 and transmitting it to a specific terminal. At this time, a terminal that has not received a Msg4 with a matching contention resolution ID may perform PRACH retransmission again. Meanwhile, in the case of the NTN communication method, the time required for initial access may become very large because the RTT is relatively large compared to TN. For example, if a terminal that has not received a message with a contention resolution ID that matches the random access procedure performs the random access procedure again starting from the PRACH transmission, the time required for initial access in NTN communication with a large RTT may increase significantly. Considering that the time interval supported for communication in NTN communication is shorter than in TN communication due to satellite movement, the delay occurring in the aforementioned random access procedure can significantly degrade the performance of NTN communication. Furthermore, in NTN communication, due to the considerably large RTT, there needs to be a sufficiently large time interval between the time of receiving the synchronization signal block (SSB) and the PRACH occasion associated with the SSB. In this disclosure, a method for initial access in NTN communication and an apparatus supporting the same are proposed.

[0115] For example, when the base station transmits Msg4 and / or MsgB to the terminal, it may include information regarding a contention resolution ID and / or TA command and / or TC-RNTI (temporary cell-radio network temporary identifier) ​​and / or UL grant for Msg3.

[0116] For example, the base station may set and / or instruct the terminal whether the Msg4 and / or MsgB include TA commands and / or TC-RNTI and / or UL grants for Msg3. For example, the base station may set and / or instruct the terminal through the master information block (MIB) and / or system information block (SIB) and / or remaining system information (RMSI) whether the Msg4 and / or MsgB include TA commands and / or TC-RNTI and / or UL grants for Msg3.

[0117] For example, if the competition resolution ID does not match, the terminal may obtain and / or use the UL grant for the TA command and / or TC-RNTI and / or Msg3, and / or if the competition resolution ID included in Msg4 and / or MsgB matches the competition resolution ID transmitted by the terminal to Msg3 and / or MsgA (PUSCH), the terminal may ignore the information.

[0118] For example, if a terminal receives Msg4 and / or MsgB, and / or the contention resolution IDs contained in Msg4 and / or MsgB do not match, and / or the Msg4 and / or MsgB contain a UL grant for a TA command and / or Msg3, the terminal may (re)start and / or continue a timer for contention resolution (e.g., ra-ContentionResolutionTimer).

[0119] For example, if a terminal receives Msg4 and / or MsgB, and / or the contention resolution ID contained in Msg4 and / or MsgB matches, and / or the UL grant for a TA command and / or Msg3 is contained in said Msg4 and / or MsgB, the terminal may stop a timer for contention resolution (e.g., ra-ContentionResolutionTimer).

[0120] For example, multiple terminals may receive Msg4 and / or MsgB, and in this case, the information used by each terminal among the included information may differ depending on whether the contention resolution IDs match.

[0121] For example, a base station node may transmit Msg4 and / or MsgB to each terminal that has collided with the transmission of PRACH and / or MsgA and / or Msg3 during the time interval in which the contention resolution timer (e.g., ra-ContentionResolutionTimer) is operating and / or within the contention resolution window (the time interval in which the terminal expects to receive Msg4 and / or MsgB), and / or even if the terminal has received Msg4 and / or MsgB during the time interval in which the contention resolution timer (e.g., ra-ContentionResolutionTimer) is operating and / or within the contention resolution window, if the contention resolution ID included in the message does not match the contention resolution ID transmitted by the terminal, the terminal may not stop the contention resolution timer (e.g., ra-ContentionResolutionTimer), and / or the terminal may (re)start or continue the contention resolution timer (e.g., ra-ContentionResolutionTimer), and / or the terminal again another Msg4 and / or may expect and / or attempt to detect MsgB reception.

[0122] In an embodiment of the present disclosure, Msg3 may be a UL channel / signal transmitted by a UE after it has transmitted an initial connection signal and received a response signal for the initial connection signal from a base station, and / or Msg4 may be a DL channel / signal transmitted by a base station in response to Msg3 after receiving Msg3 from a terminal.

[0123] In an embodiment of the present disclosure, MsgA may be a UL signal or channel (PUSCH) including an initial connection signal and / or a contention resolution ID transmitted by a UE upon initial connection, and MsgB is a message transmitted by a base station node to a terminal in response to receiving MsgA from the UE, and may include a contention resolution ID and / or (initial) TA command and / or TPC (transmit power control) and / or PUCCH resource indicator and / or a UL grant for Msg3.

[0124] In the case of PRACH in a conventional system, a cell supporting high mobility can support a restricted set for cyclic shifts. This can be accomplished by removing candidate values ​​for cyclic shifts for the mirror, as a mirror is generated according to the base sequence (u) of PRACH in a high Doppler environment.

[0125] On the other hand, if the base station (pre-)compensates for a suitable time- and / or-frequency offset from the outset, cyclic shifting can be fully supported without a limited set. In the above case, the amount of PRACH sequences obtainable through cyclic shifting can be increased.

[0126] For example, a base station may perform different time and / or frequency offset pre-compensation for UL resources (e.g., PRACH resources) separated by a time axis and / or a frequency axis.

[0127] For example, the terminal may expect or assume that the base station performs different time and / or frequency offset pre-compensation for UL resources (e.g., PRACH resources) separated by the time axis and / or frequency axis.

[0128] For example, depending on the speed and / or velocity of the terminal and / or the (predicted or determined) time and / or frequency offset value and / or the relative speed and / or velocity between the terminal and the base station and / or the relative speed between the terminal and the NTN node, the UL resources or PRACH resources used by the terminal during UL transmission or PRACH transmission may differ.

[0129] For example, depending on the speed and / or velocity of the terminal and / or the (predicted or determined) time and / or frequency offset value and / or the relative speed and / or velocity between the terminal and the base station and / or the relative speed between the terminal and the NTN node, the terminal may perform UL channel / signal and / or PRACH transmission using the corresponding UL resource or PRACH resource.

[0130] For example, the time and / or frequency offset value (predicted or determined) at the terminal may be estimated based on the ARFCN (absolute radio frequency channel number) value for the DL channel / signal and / or DL ​​carrier / cell / BWP / channel and / or the ARFCN value for the UL carrier / cell / BWP / channel received by the terminal from the base station. For example, the terminal may estimate the time and / or frequency offset value (relative to the absolute frequency position for the UL ARFCN) during UL transmission based on the Doppler shift value and / or Doppler variation value (relative to the absolute frequency position for the DL ARFCN) estimated based on the synchronization signal and / or PBCH and / or PBCH DMRS (demodulation reference signal).

[0131] For example, the terminal may receive ARFCN information (for PCell and / or DL ​​carrier) from the base station. For example, the terminal may estimate and / or obtain frequency position information and / or frequency axis offset information for the final PCell and / or DL ​​carrier based on ARFCN information for the PCell and / or DL ​​carrier received through a synchronization signal and / or PBCH detection and / or through PBCH and / or SIB.

[0132] For example, the terminal may pre-compensate for a time and / or frequency offset when transmitting a UL channel / signal and / or PRACH, and / or the pre-compensated value may be estimated based on a DL channel / signal received by the terminal from a base station.

[0133] For example, cyclic shift setting values ​​(e.g., whether to use a limited set of cyclic shifts and / or the number of cyclic shifts and / or the cyclic shift interval value, etc.) may be different or / or set independently for each PRACH time- and / or-frequency resource.

[0134] The advantage of the above method may be the use of PRACH sequences with good orthogonality properties by allowing the use of an unrestricted set instead of a restricted set of cyclic shifts due to high-speed support.

[0135] For example, the terminal can receive absolute reference time information and / or synchronization signals and / or PBCH and / or MIB (master information block) and / or RMSI (remaining system information) and / or OSI (other system information) from base station nodes and / or NTN nodes.

[0136] For example, the terminal can estimate / acquire distance information and / or propagation delay information between the terminal and a base station node or NTN node based on an absolute reference time and the time of receiving a synchronization signal and / or PBCH.

[0137] For example, when transmitting an initial connection signal and / or a UL channel / signal, the terminal may perform transmission by applying a TA (timing advance) value determined based on the estimated / acquired propagation delay. For example, the TA value may be determined / calculated in the form of a multiple of the estimated / acquired propagation delay.

[0138] Meanwhile, in TN, the RTT can be relatively short. Therefore, during the process of linking SSB-PRACH opportunities, configurations such as a structure where the PRACH opportunity is located in the frame following the SSB, or a structure where the PRACH opportunity is allocated starting from the same frame as the SSB when the PRACH opportunity period is short, may be permitted. On the other hand, in NTN, the RTT can be relatively long. Therefore, a PRACH transmitted after receiving an SSB for a specific SSB index may be transmitted through a PRACH linked to an SSB of the same SSB index in the next SSB period. In addition, in NTN, since the terminal must receive ephemeral information to transmit a PRACH, one may consider setting or changing PRACH opportunities and / or PRACH resources (e.g., time offset between the SSB and PRACH opportunities) through NTN configuration and / or ephemeral information. Alternatively, relevant information, such as PBCH content, may be provided in the SSB. In addition, it may be advantageous to change the time offset between SSB-to-PRACH opportunities based on the RTT change according to the location of the NTN node.

[0139] For example, a terminal may receive a first synchronization signal and / or PBCH resource information (e.g., synchronization signal and / or PBCH period) and / or a second synchronization signal and / or PBCH resource information (e.g., synchronization signal and / or PBCH period) from a base station node. For example, the first synchronization signal and / or PBCH resource information (e.g., synchronization signal and / or PBCH period) may be referred to as an actual SSB periodicity, and the base station may actually transmit an SSB (periodically) based on the set value. For example, the second synchronization signal and / or PBCH resource information (e.g., synchronization signal and / or PBCH period) may be referred to as a virtual SSB periodicity, and the set value may be used to reserve a synchronization signal and / or PBCH resource that may not actually be transmitted and / or PRACH opportunities and / or PRACH resources associated with the synchronization signal and / or PBCH resource.

[0140] For example, a terminal may receive a synchronization signal and / or a PBCH from a first synchronization signal and / or a PBCH resource information resource, and the terminal may transmit an initial connection signal through PRACH opportunities and / or a PRACH resource corresponding to the received synchronization signal and / or PBCH resource (index). For example, the PRACH opportunities corresponding to the synchronization signal and / or PBCH resource may be coupled to a virtual SSB periodicity and / or a second synchronization signal and / or PBCH resource.

[0141] For example, when setting up PRACH opportunities and / or resources, the corresponding SSB (index) (group) may be set. For example, when setting up PRACH resources, subframe and / or slot and / or symbol offset values ​​within the frame may be set (separately).

[0142] For example, when setting up PRACH opportunities and / or resources, the first SSB may be linked from the first PRACH opportunity at a specific reference point (e.g., a point in time to which a (set) time offset value is applied from the first subframe or slot within the PRACH resource cycle). For example, the time offset may be set based on a first reference RTT. For example, multiple time offsets may exist, each corresponding to a different reference RTT. This allows PRACH opportunities linked to a specific SSB to be associated with different reference RTTs.

[0143] In an embodiment of the present disclosure, the location of the terminal may be a location determined based on information measured (directly) by the terminal, and / or a location determined based on reference location information provided by the terminal from a third node.

[0144] A combination of embodiments of the present disclosure can operate in conjunction with each other.

[0145] Various embodiments of the present disclosure may be applied differently depending on the link type (DL, UL, SL) and / or the data type (SIB, group cast, unicast) and / or the search space type (CSS (common search space), USS (UE-specific search space)) where the scheduling PDCCH is detected and / or the base station node type and / or altitude and / or whether there is a power constraint. For example, a combination of various embodiments of the present disclosure may be applied only when involved in SIB transmission.

[0146] FIG. 13 illustrates a procedure performed by a first device according to one embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiments may be omitted.

[0147] Referring to FIG. 13, in step S1310, the first device may transmit a first message to the second device, which includes a competition resolution identifier based on a first grant. In step S1320, the first device may receive a second message from the second device, which includes a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0148] For example, the second message above may further include a TA (timing advance) command.

[0149] For example, information regarding whether the second grant is included in the second message can be received from the second device.

[0150] For example, information regarding whether the second grant is included in the second message may be included in at least one of the system information block or the master information block.

[0151] For example, based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message do not match, the TC-RNTI included in the second message and the second grant may be used by the first device for initial access.

[0152] For example, based on the fact that the race resolution identifier included in the first message and the race resolution identifier included in the second message do not match, the first device may transmit to the second device a third message (e.g., a message for the same purpose as the first message) containing the race resolution identifier based on the TC-RNTI and the second grant included in the second message. In this case, for example, the transmission and / or reception of a random access preamble (e.g., Msg1) and a random access response (e.g., Msg2) may be omitted.

[0153] For example, based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message match, the TC-RNTI and the second grant included in the second message may be ignored.

[0154] For example, (i) the second message including the competition resolution identifier, the TC-RNTI, and the second grant is received, and (ii) based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message do not match, the timer for competition resolution may be started, restarted, or continued.

[0155] For example, (i) the second message including the competition resolution identifier, the TC-RNTI, and the second grant is received, and (ii) the competition resolution identifier included in the first message matches the competition resolution identifier included in the second message, and the timer for competition resolution may be stopped.

[0156] Additionally, for example, the first device may transmit a signal for initial connection to the second device. Additionally, for example, the first device may receive a response signal including the first grant from the second device based on the signal for initial connection. For example, the first message may be a message transmitted after the response signal.

[0157] For example, the first message above may further include a signal for initial connection.

[0158] For example, the second message above may be a message received based on the first message.

[0159] For example, a time offset between a resource for initial access and a resource for synchronization can be set for the first device.

[0160] For example, the first device may be a terminal, and the second device may be a base station, a non-ground network node, or a satellite.

[0161] The proposed method above may be applied to a device according to various embodiments of the present disclosure. For example, a processor (102) of a first device (100) may control a transceiver (106) to transmit a first message including a competition resolution identifier to a second device based on a first grant, and / or the processor (102) of the first device (100) may control a transceiver (106) to receive a second message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant from the second device.

[0162] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: transmitting a first message containing a contention resolution identifier to a second device based on a first grant; and / or receiving a second message from the second device containing a contention resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0163] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause a first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: transmitting a first message containing a contention resolution identifier to a second device based on a first grant; and / or receiving a second message from the second device containing a contention resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0164] According to one embodiment of the present disclosure, a non-temporary computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a first device to perform an operation based on execution. For example, the operation may include at least one of: transmitting a first message containing a race resolution identifier to a second device based on a first grant; and / or receiving a second message from the second device containing a race resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0165] FIG. 14 illustrates a procedure performed by a second device according to one embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiments may be omitted.

[0166] Referring to FIG. 14, at step S1410, the second device may receive a first message from the first device that includes a competition resolution identifier based on a first grant. At step S1420, the second device may transmit a second message that includes a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0167] For example, the second message above may further include a TA (timing advance) command.

[0168] For example, information regarding whether the second grant is included in the second message may be transmitted to the first device.

[0169] For example, information regarding whether the second grant is included in the second message may be included in at least one of the system information block or the master information block.

[0170] For example, based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message do not match, the TC-RNTI included in the second message and the second grant may be used by the first device for initial access.

[0171] For example, based on the fact that the race resolution identifier included in the first message and the race resolution identifier included in the second message do not match, the second device may receive from the first device a third message (e.g., a message for the same purpose as the first message) containing the race resolution identifier based on the TC-RNTI and the second grant included in the second message. In this case, for example, the transmission and / or reception of a random access preamble (e.g., Msg1) and a random access response (e.g., Msg2) may be omitted.

[0172] For example, based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message match, the TC-RNTI and the second grant included in the second message may be ignored.

[0173] For example, (i) the second message including the competition resolution identifier, the TC-RNTI, and the second grant is transmitted, and (ii) based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message do not match, the timer for competition resolution may be started, restarted, or continued.

[0174] For example, (i) the second message including the competition resolution identifier, the TC-RNTI, and the second grant is transmitted, and (ii) the competition resolution identifier included in the first message matches the competition resolution identifier included in the second message, and the timer for competition resolution may be stopped.

[0175] Additionally, for example, the second device may receive a signal for initial connection from the first device. Additionally, for example, the second device may transmit a response signal including the first grant to the first device based on the signal for initial connection. For example, the first message may be a message received after the response signal.

[0176] For example, the first message above may further include a signal for initial connection.

[0177] For example, the second message above may be a message transmitted based on the first message.

[0178] For example, a time offset between a resource for initial access and a resource for synchronization can be set for the first device.

[0179] For example, the first device may be a terminal, and the second device may be a base station, a non-ground network node, or a satellite.

[0180] The proposed method above may be applied to a device according to various embodiments of the present disclosure. For example, a processor (202) of a second device (200) may control a transceiver (206) to receive a first message including a competition resolution identifier from the first device based on a first grant, and / or the processor (202) of the second device (200) may control the transceiver (206) to transmit a second message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0181] According to one embodiment of the present disclosure, a second device may be provided. For example, the second device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the second device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: receiving a first message from the first device including a contention resolution identifier based on a first grant; and / or transmitting a second message including a contention resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0182] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause a second device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: receiving a first message from the first device including a contention resolution identifier based on a first grant; and / or transmitting a second message including a contention resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0183] According to one embodiment of the present disclosure, a non-temporary computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a second device to perform an operation based on execution. For example, the operation may include at least one of: receiving a first message from the first device including a race resolution identifier based on a first grant; and / or transmitting a second message including a race resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

[0184] According to various embodiments of the present disclosure, delay time in random access procedures and / or contention resolution procedures can be efficiently reduced. For example, since there is no need to start again from the random access preamble transmission even if a device fails to resolve contention, the time for initial access in NTN communication with a long RTT can be shortened. Furthermore, by setting or defining a time offset between a resource for synchronization (e.g., SSB resource) and a resource for initial access (e.g., PRACH resource), the resource for initial access can be efficiently allocated or placed.

[0185] Various embodiments of the present disclosure may be combined with one another, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0186] The following describes an apparatus to which various embodiments of the present disclosure may be applied.

[0187] Although not limited to this, the various descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0188] Examples are provided in more detail below with reference to the drawings. In the following drawings and descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or function blocks unless otherwise described.

[0189] FIG. 15 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment of FIG. 15 can be combined with various embodiments of the present disclosure.

[0190] Referring to FIG. 15, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Thing) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with wireless communication functions, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and / or an Aerial Vehicle (AV) (e.g., Advanced Air Mobility). The XR device includes an Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) device and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a computer (e.g., a laptop, etc.). The home appliance may include a TV, a refrigerator, a washing machine, etc. The IoT device may include a sensor, a smart meter, etc. For example, a base station and a network may be implemented as a wireless device, and a specific wireless device (200a) may operate as a base station / network node to other wireless devices.

[0191] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. For example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0192] Wireless devices (100a to 100f) can be connected to a network (300) through a base station (200). Artificial Intelligence (AI) technology may be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) through the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices (100a to 100f) may communicate with each other through the base station (200) / network (300), but they may also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0193] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base station (200) and base station (200) / base station (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR), such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and inter-base station communication (150c) (e.g., relay, IAB (Integrated Access Backhaul)). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various proposals of the present disclosure, at least some of the following may be performed: various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc.

[0194] FIG. 16 shows a wireless device according to one embodiment of the present disclosure. The embodiment of FIG. 16 may be combined with various embodiments of the present disclosure.

[0195] Referring to FIG. 16, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} may correspond to {wireless device (100x), base station (200)} and / or {wireless device (100x), wireless device (100x)} of FIG. 15.

[0196] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0197] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). Memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeable with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0198] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document.

[0199] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be contained in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0200] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0201] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document through one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0202] FIG. 17 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure. The embodiment of FIG. 17 can be combined with various embodiments of the present disclosure.

[0203] Referring to FIG. 17, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Although not limited thereto, the operation / function of FIG. 17 may be performed in the processor (102, 202) and / or transceiver (106, 206) of FIG. 16. The hardware elements of FIG. 17 may be implemented in the processor (102, 202) and / or transceiver (106, 206) of FIG. 16. For example, blocks 1010 through 1060 may be implemented in the processor (102, 202) of FIG. 16. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 16, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 16.

[0204] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 17. Here, the codeword is an encoded bit sequence of an information block. The information block may include a transmission block (e.g., UL-SCH transmission block, DL-SCH transmission block). The wireless signal can be transmitted through various physical channels (e.g., PUSCH, PDSCH).

[0205] Specifically, a codeword can be converted into a scrambled bit sequence by a scrambler (1010). The scrambled sequence used for scrambling is generated based on an initialization value, which may include ID information of a wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020). The modulation method may include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding). The output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by an N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. Here, the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on the complex modulation symbols. Additionally, the precoder (1040) can perform precoding without performing transform precoding.

[0206] A resource mapper (1050) can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. A signal generator (1060) generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to another device through each antenna. To this end, the signal generator (1060) may include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0207] The signal processing process for a received signal in a wireless device can be configured as the inverse of the signal processing process (1010–1060) of FIG. 17. For example, a wireless device (e.g., 100, 200 in FIG. 16) can receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal can be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Subsequently, the baseband signal can be restored into a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scrambling process. The codeword can be restored into the original information block through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0208] FIG. 18 illustrates a wireless device according to one embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use-example / service (see FIG. 15). The embodiment of FIG. 18 may be combined with various embodiments of the present disclosure.

[0209] Referring to FIG. 18, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 16 and may be composed of various elements, components, units / parts, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 16. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 16. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and additional elements (140) and controls the general operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on a program / code / command / information stored in the memory unit (130). Additionally, the control unit (120) may transmit information stored in the memory unit (130) to an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110) in the memory unit (130).

[0210] The additional element (140) can be configured in various ways depending on the type of wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 15, 100a), a vehicle (Fig. 15, 100b-1, 100b-2), an XR device (Fig. 15, 100c), a portable device (Fig. 15, 100d), a home appliance (Fig. 15, 100e), an IoT device (Fig. 15, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (Fig. 15, 400), a base station (Fig. 15, 200), a network node, etc. Wireless devices can be used in a movable or fixed location depending on the use—e.g., service.

[0211] In FIG. 18, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least partially connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be connected via a wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly via the communication unit (110). Additionally, each element, component, unit / part, and / or module within the wireless device (100, 200) may include one or more additional elements. For example, the control unit (120) may be composed of one or more sets of processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an Electronic Control Unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory and / or a combination thereof.

[0212] Hereinafter, an implementation example of FIG. 18 will be described in more detail with reference to the drawings.

[0213] FIG. 19 illustrates a portable device according to one embodiment of the present disclosure. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a portable computer (e.g., a laptop, etc.). The portable device may be referred to as an MS (Mobile Station), UT (User Terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless Terminal). The embodiment of FIG. 19 may be combined with various embodiments of the present disclosure.

[0214] Referring to FIG. 19, the portable device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b), and an input / output unit (140c). The antenna unit (108) may be configured as part of the communication unit (110). Blocks 110 to 130 / 140a to 140c each correspond to blocks 110 to 130 / 140 of FIG. 18.

[0215] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (120) can control the components of the portable device (100) to perform various operations. The control unit (120) may include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / code / commands required for the operation of the portable device (100). Additionally, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the portable device (100) and may include wired / wireless charging circuits, batteries, etc. The interface unit (140b) can support the connection between the portable device (100) and other external devices. The interface unit (140b) may include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can receive or output video information / signals, audio information / signals, data, and / or information input 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, etc.

[0216] For example, in the case of data communication, the input / output unit (140c) acquires information / signals (e.g., touch, text, voice, image, video) input from the user, and the acquired information / signals can be stored in the memory unit (130). The communication unit (110) converts the information / signals stored in the memory into wireless signals and can directly transmit the converted wireless signals to another wireless device or to a base station. Additionally, the communication unit (110) can receive wireless signals from another wireless device or base station and then restore the received wireless signals to their original information / signals. The restored information / signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (140c).

[0217] The claims described in this specification may be combined in various ways. For example, the technical features of the method claims in this specification may be combined to be implemented as a device, and the technical features of the device claims in this specification may be combined to be implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a device, and the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a method.

Claims

1. Regarding the method, The first device transmits a first message including a competition resolution identifier to the second device based on a first grant; and A method comprising the step of the first device receiving a second message from the second device, the message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

2. In Paragraph 1, The above second message further includes a TA (timing advance) command, a method.

3. In Paragraph 1, A method in which information regarding whether the second grant is included in the second message is received from the second device.

4. In Paragraph 1, A method in which information regarding whether the second grant is included in the second message is included in at least one of a system information block or a master information block.

5. In Paragraph 1, A method in which, based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message do not match, the TC-RNTI included in the second message and the second grant are used by the first device for initial access.

6. In Paragraph 1, A method in which the TC-RNTI and the second grant included in the second message are ignored based on the fact that the competition resolution identifier included in the first message matches the competition resolution identifier included in the second message.

7. In Paragraph 1, (i) the second message including the competition resolution identifier, the TC-RNTI, and the second grant is received, and (ii) based on the fact that the competition resolution identifier included in the first message and the competition resolution identifier included in the second message do not match, the timer for competition resolution is started, restarted, or continued, method.

8. In Paragraph 1, (i) receiving the second message including the competition resolution identifier, the TC-RNTI, and the second grant, and (ii) stopping the timer for competition resolution based on the fact that the competition resolution identifier included in the first message matches the competition resolution identifier included in the second message.

9. In Paragraph 1, The first device transmits a signal for initial connection to the second device; and The first device further comprises the step of receiving a response signal including the first grant from the second device based on the signal for the initial connection; wherein A method in which the first message above is a message transmitted after the response signal.

10. In Paragraph 1, A method in which the first message above further includes a signal for initial connection.

11. In Paragraph 1, A method in which the second message above is a message received based on the first message above.

12. In Paragraph 1, A method in which a time offset between a resource for initial access and a resource for synchronization is set to the first device.

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

14. In the first device, At least one transmitter / receiver; At least one processor; and The first device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Based on the first grant, transmitting a first message including a competition resolution identifier to a second device; and A first device comprising: receiving a second message from the second device, the message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

15. In a processing device, At least one processor; and The first device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Based on the first grant, transmitting a first message including a competition resolution identifier to a second device; and A processing device comprising: receiving a second message from the second device, the message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

16. A non-transient computer-readable storage medium that records instructions, The above commands cause the first device to perform an operation based on execution, wherein the operation is: Based on the first grant, transmitting a first message including a competition resolution identifier to a second device; and A non-temporary computer-readable storage medium comprising: receiving a second message from the second device, the message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

17. Regarding the method, A second device receiving a first message from the first device, comprising a competition resolution identifier based on a first grant; and A method comprising the step of the second device transmitting a second message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

18. In the second device, At least one transmitter / receiver; At least one processor; and The second device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Based on a first grant, receiving a first message from a first device that includes a competition resolution identifier; and A second device comprising: transmitting a second message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

19. In a processing device, At least one processor; and The second device is configured to perform an operation based on the fact that the instructions are executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Based on a first grant, receiving a first message from a first device that includes a competition resolution identifier; and A processing device comprising: transmitting a second message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

20. A non-transient computer-readable storage medium that records instructions, The above commands cause the second device to perform an operation based on execution, wherein the operation is: Based on a first grant, receiving a first message from a first device that includes a competition resolution identifier; and A non-temporary computer-readable storage medium comprising: transmitting a second message including a competition resolution identifier, a TC-RNTI (temporary cell-radio network temporary identifier), and a second grant.

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