WO2024058479A1 - Procédé de gestion de trajets multiples - Google Patents

Procédé de gestion de trajets multiples Download PDF

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Publication number
WO2024058479A1
WO2024058479A1 PCT/KR2023/013237 KR2023013237W WO2024058479A1 WO 2024058479 A1 WO2024058479 A1 WO 2024058479A1 KR 2023013237 W KR2023013237 W KR 2023013237W WO 2024058479 A1 WO2024058479 A1 WO 2024058479A1
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Prior art keywords
path
information
remote
relay
amf
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PCT/KR2023/013237
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English (en)
Korean (ko)
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김석중
김래영
윤명준
변대욱
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엘지전자 주식회사
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Publication of WO2024058479A1 publication Critical patent/WO2024058479A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • This specification relates to mobile communications.
  • 3GPP (3rd generation partnership project) LTE long-term evolution is a technology to enable high-speed packet communication. Many methods have been proposed to achieve the LTE goals of reducing costs for users and operators, improving service quality, expanding coverage, and increasing system capacity. 3GPP LTE requires lower cost per bit, improved service usability, flexible use of frequency bands, simple structure, open interface, and appropriate power consumption of the terminal as high-level requirements.
  • NR new radio
  • 3GPP identifies the technology components needed to successfully standardize NR that meets both urgent market needs and the longer-term requirements presented by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT)-2020 process in a timely manner. and must be developed. Additionally, NR should be able to use any spectrum band up to at least 100 GHz, which can be used for wireless communications even in the distant future.
  • ITU-R ITU radio communication sector
  • IMT international mobile telecommunications
  • NR targets a single technology framework that addresses all deployment scenarios, usage scenarios, and requirements, including enhanced mobile broadband (eMBB), massive machine type-communications (mMTC), and ultra-reliable and low latency communications (URLLC). do. NR must be inherently forward compatible.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type-communications
  • URLLC ultra-reliable and low latency communications
  • the problem is how the network recognizes multipath.
  • the base station can transmit serving cell information about multipath to the AMF.
  • FIG. 1 shows an example of a communication system to which implementations of the present disclosure are applied.
  • FIG. 2 shows an example of a wireless device to which implementations of the present disclosure are applied.
  • FIG 3 shows an example of a wireless device to which implementations of the present disclosure are applied.
  • Figure 4 shows an example of a UE to which the implementation of the present specification is applied.
  • FIGS 5a and 5b show the Layer-2 link establishment procedure for unicast mode of ProSe Direct communication through the PC5 reference point.
  • Figure 6 shows the layer-2 release procedure through the PC5 reference point.
  • Figure 7 shows a scenario in which Direct Path and Indirect Path are served to the UE through one and the same NG-RAN.
  • Figure 8 shows a scenario in which two different indirect paths are served to the UE through one same NG-RAN.
  • Figure 9 shows a scenario in which Direct Path and Indirect Path are served to the UE through two different NG-RANs.
  • Figure 10 shows a scenario in which two different indirect paths are served to the UE through two different NG-RANs.
  • Figure 11 is an exemplary diagram showing a procedure according to the first embodiment.
  • Figure 12 is an exemplary diagram showing a procedure according to the second embodiment.
  • Figure 13 is an exemplary diagram showing a procedure according to the third embodiment.
  • Figure 14 shows the base station's procedures for the disclosure of this specification.
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single access systems, and SC-FDMA (single access) systems.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single access
  • CDMA can be implemented through wireless technologies such as universal terrestrial radio access (UTRA) or CDMA2000.
  • TDMA can be implemented over wireless technologies such as global system for mobile communications (GSM), general packet radio service (GPRS), or enhanced data rates for GSM evolution (EDGE).
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • EDGE enhanced data rates for GSM evolution
  • OFDMA can be implemented through wireless technologies such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or evolved UTRA (E-UTRA).
  • UTRA is part of the universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long-term evolution (LTE) is part of evolved UMTS (E-UMTS) using E-UTRA.
  • 3GPP LTE uses OFDMA in the downlink (DL) and SC-FDMA in the uplink (UL).
  • the evolution of 3GPP LTE includes LTE-A (advanced), LTE-A Pro, and/or 5G NR (new radio).
  • implementations herein are primarily described in relation to a 3GPP based wireless communication system.
  • the technical features of this specification are not limited to this.
  • the following detailed description is provided based on a mobile communication system corresponding to a 3GPP-based wireless communication system, but aspects of the present specification that are not limited to a 3GPP-based wireless communication system can be applied to other mobile communication systems.
  • a or B may mean “only A,” “only B,” or “both A and B.” In other words, as used herein, “A or B” may be interpreted as “A and/or B.”
  • A, B or C refers to “only A,” “only B,” “only C,” or “any and all combinations of A, B, and C ( It can mean “any combination of A, B and C)”.
  • the slash (/) or comma used in this specification may mean “and/or.”
  • A/B can mean “A and/or B.”
  • A/B can mean “only A,” “only B,” or “both A and B.”
  • A, B, C can mean “A, B, or C.”
  • At least one of A and B may mean “only A,” “only B,” or “both A and B.”
  • the expression “at least one of A or B” or “at least one of A and/or B” means “A and It can be interpreted the same as “at least one of A and B.”
  • At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C”. It may mean “any combination of A, B and C.”
  • at least one of A, B or C” or “at least one of A, B and/or C” means It may mean “at least one of A, B and C.”
  • control information may be proposed as an example of “control information.”
  • control information in this specification is not limited to “PDCCH,” and “PDCCH” may be proposed as an example of “control information.”
  • PDCCH control information
  • FIG. 1 shows an example of a communication system to which implementations of the present disclosure are applied.
  • the 5G usage scenario shown in FIG. 1 is only an example, and the technical features of this specification can be applied to other 5G usage scenarios not shown in FIG. 1.
  • the three main requirements categories for 5G are (1) enhanced mobile broadband (eMBB) category, (2) massive machine type communication (mMTC) category, and (3) ultra-reliable low-latency communication. (URLLC; ultra-reliable and low latency communications) category.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communication
  • URLLC ultra-reliable low-latency communications
  • the communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300.
  • Figure 1 illustrates a 5G network as an example of a network of the communication system 1, but the implementation of this specification is not limited to the 5G system and can be applied to future communication systems beyond the 5G system.
  • Base station 200 and network 300 may be implemented as wireless devices, and certain wireless devices may operate as base stations/network nodes in relation to other wireless devices.
  • Wireless devices 100a to 100f represent devices that perform communication using radio access technology (RAT) (e.g., 5G NR or LTE), and may also be referred to as communication/wireless/5G devices.
  • RAT radio access technology
  • the wireless devices 100a to 100f include, but are not limited to, robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, portable devices 100d, and home appliances. It may include a product 100e, an IoT device 100f, and an artificial intelligence (AI) device/server 400.
  • vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of vehicle-to-vehicle communication.
  • Vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones).
  • UAVs unmanned aerial vehicles
  • XR devices may include AR/VR/mixed reality (MR) devices, and may include head-mounted display devices (HMDs) mounted on vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signs, vehicles, robots, etc. It can be implemented in the form of a mounted device) or HUD (head-up display).
  • Portable devices may include smartphones, smart pads, wearable devices (e.g. smart watches or smart glasses), and computers (e.g. laptops).
  • Home appliances may include TVs, refrigerators, and washing machines.
  • IoT devices can include sensors and smart meters.
  • the wireless devices 100a to 100f may be referred to as user equipment (UE).
  • UEs include, for example, mobile phones, smartphones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation systems, slate PCs, tablet PCs, ultrabooks, vehicles, and autonomous driving functions.
  • vehicles connected cars, UAVs, AI modules, robots, AR devices, VR devices, MR devices, holographic devices, public safety devices, MTC devices, IoT devices, medical devices, fintech devices (or financial devices), security devices , weather/environment devices, 5G service-related devices, or 4th Industrial Revolution-related devices.
  • a UAV may be an aircraft that is navigated by radio control signals without a person on board.
  • a VR device may include a device for implementing objects or backgrounds of a virtual environment.
  • an AR device may include a device implemented by connecting an object or background in the virtual world to an object or background in the real world.
  • an MR device may include a device implemented by merging an object or a virtual world background with an object or a real world background.
  • the hologram device may include a device for recording and reproducing three-dimensional information to create a 360-degree stereoscopic image using the light interference phenomenon that occurs when two laser lights, called holograms, meet.
  • a public safety device may include an image relay or imaging device that can be worn on the user's body.
  • MTC devices and IoT devices may be devices that do not require direct human intervention or manipulation.
  • MTC devices and IoT devices may include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.
  • a medical device may be a device used for the purpose of diagnosing, treating, mitigating, treating, or preventing disease.
  • a medical device may be a device used to diagnose, treat, alleviate, or correct injury or damage.
  • a medical device may be a device used for the purpose of examining, replacing, or modifying structure or function.
  • a medical device may be a device used for the purpose of pregnancy modification.
  • medical devices may include therapeutic devices, driving devices, (in vitro) diagnostic devices, hearing aids, or surgical devices.
  • a security device may be a device installed to prevent possible harm and maintain safety.
  • a security device may be a camera, closed-circuit television (CCTV), recorder, or black box.
  • CCTV closed-circuit television
  • a fintech device may be a device that can provide financial services such as mobile payments.
  • a fintech device may include a payment device or POS system.
  • a weather/environment device may include a device that monitors or predicts the weather/environment.
  • Wireless devices 100a to 100f may be connected to the network 300 through the base station 200.
  • AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300.
  • the network 300 may be configured using a 3G network, a 4G (eg, LTE) network, a 5G (eg, NR) network, and a post-5G network.
  • Wireless devices 100a - 100f may communicate with each other via base station 200/network 300, but communicate directly (e.g., sidelink communication) rather than via base station 200/network 300. You may.
  • vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V)/vehicle-to-everything (V2X) communication).
  • an IoT device e.g., sensor
  • another IoT device e.g., sensor
  • another wireless device e.g., 100f
  • Wireless communication/connections 150a, 150b, 150c may be established between wireless devices 100a - 100f and/or between wireless devices 100a - 100f and base station 200 and/or between base station 200.
  • wireless communication/connection includes uplink/downlink communication (150a), sidelink communication (150b) (or device-to-device (D2D) communication), communication between base stations (150c) (e.g. relay, IAB (integrated It can be established through various RATs (e.g., 5G NR), such as access and backhaul).
  • IAB integrated It can be established through various RATs (e.g., 5G NR), such as access and backhaul).
  • wireless communication/connection 150a, 150b, and 150c may transmit/receive signals through various physical channels.
  • various configuration information setting processes for transmitting/receiving wireless signals various signal processing processes (e.g. channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), and a resource allocation process, etc. may be performed.
  • AI refers to the field of researching artificial intelligence or methodologies to create it
  • machine learning refers to the field of defining various problems dealt with in the field of artificial intelligence and researching methodologies to solve them.
  • Machine learning is also defined as an algorithm that improves the performance of a task through consistent experience.
  • a robot can refer to a machine that automatically processes or operates a given task based on its own capabilities.
  • a robot that has the ability to recognize the environment, make decisions on its own, and perform actions can be called an intelligent robot.
  • Robots can be classified into industrial, medical, household, military, etc. depending on the purpose or field of use.
  • a robot is equipped with a driving unit including an actuator or motor and can perform various physical movements such as moving robot joints.
  • a mobile robot includes wheels, brakes, and propellers in the driving part, and can travel on the ground or fly in the air through the driving part.
  • Autonomous driving refers to a technology that drives on its own, and an autonomous vehicle refers to a vehicle that drives without user intervention or with minimal user intervention.
  • autonomous driving includes technology that maintains the driving lane, technology that automatically adjusts speed such as adaptive cruise control, technology that automatically drives along a set route, and technology that automatically sets the route and drives when the destination is set. All technologies, etc. may be included.
  • Vehicles include vehicles equipped only with an internal combustion engine, hybrid vehicles equipped with both an internal combustion engine and an electric motor, and electric vehicles equipped with only an electric motor, and may include not only cars but also trains and motorcycles.
  • Self-driving vehicles can be viewed as robots with autonomous driving capabilities.
  • Extended reality refers collectively to VR, AR, and MR.
  • VR technology provides only CG images of objects or backgrounds in the real world
  • AR technology provides CG images created virtually on top of images of real objects
  • MR technology provides CG that mixes and combines virtual objects with the real world. It's technology.
  • MR technology is similar to AR technology in that it shows real objects and virtual objects together. However, in AR technology, virtual objects are used to complement real objects, whereas in MR technology, virtual objects and real objects are used equally.
  • NR supports multiple numerologies or subcarrier spacing (SCS) to support various 5G services. For example, if SCS is 15kHz, it supports a wide area in traditional cellular bands, and if SCS is 30kHz/60kHz, it supports dense-urban, lower latency, and wider areas. It supports a wider carrier bandwidth, and when SCS is 60kHz or higher, it supports a bandwidth greater than 24.25GHz to overcome phase noise.
  • SCS subcarrier spacing
  • the NR frequency band can be defined as two types of frequency ranges (FR1, FR2).
  • the values of the frequency range may vary.
  • the frequency ranges of the two types (FR1, FR2) may be as shown in Table 1 below.
  • FR1 may mean “sub 6GHz range”
  • FR2 may mean “above 6GHz range” and may be called millimeter wave (mmW). there is.
  • mmW millimeter wave
  • Frequency range definition frequency range Subcarrier spacing FR1 450MHz - 6000MHz 15, 30, 60kHz FR2 24250MHz - 52600MHz 60, 120, 240 kHz
  • FR1 may include a band of 410MHz to 7125MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.). For example, the frequency band above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included within FR1 may include an unlicensed band. Unlicensed bands can be used for a variety of purposes, for example for communications for vehicles (e.g. autonomous driving).
  • Frequency range definition frequency range Subcarrier spacing FR1 410MHz - 7125MHz 15, 30, 60kHz FR2 24250MHz - 52600MHz 60, 120, 240kHz
  • wireless communication technologies implemented in the wireless device of the present specification may include LTE, NR, and 6G, as well as narrowband IoT (NB-IoT, narrowband IoT) for low-power communication.
  • NB-IoT technology may be an example of LPWAN (low power wide area network) technology and may be implemented in standards such as LTE Cat NB1 and/or LTE Cat NB2, and is not limited to the above-mentioned names.
  • the wireless communication technology implemented in the wireless device of the present specification may perform communication based on LTE-M technology.
  • LTE-M technology may be an example of LPWAN technology and may be called various names such as enhanced MTC (eMTC).
  • eMTC enhanced MTC
  • LTE-M technologies include 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE MTC. , and/or 7) LTE M, etc. may be implemented in at least one of various standards, and are not limited to the above-mentioned names.
  • the wireless communication technology implemented in the wireless device of the present specification may include at least one of ZigBee, Bluetooth, and/or LPWAN considering low-power communication, and is limited to the above-mentioned names. That is not the case.
  • ZigBee technology can create personal area networks (PANs) related to small/low-power digital communications based on various standards such as IEEE 802.15.4, and can be called by various names.
  • PANs personal area networks
  • FIG. 2 shows an example of a wireless device to which implementations of the present disclosure are applied.
  • the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals to/from an external device through various RATs (eg, LTE and NR).
  • various RATs eg, LTE and NR.
  • ⁇ first wireless device 100 and second wireless device 200 ⁇ are ⁇ wireless devices 100a to 100f and base station 200 ⁇ of FIG. 1, ⁇ wireless devices 100a to 100f ) and wireless devices (100a to 100f) ⁇ and/or ⁇ base station 200 and base station 200 ⁇ .
  • the first wireless device 100 may include at least one transceiver, such as transceiver 106, at least one processing chip, such as processing chip 101, and/or one or more antennas 108.
  • the processing chip 101 may include at least one processor, such as the processor 102, and at least one memory, such as the memory 104.
  • processor 102 such as the processor 102
  • memory 104 such as the memory 104.
  • FIG 2 it is shown as an example that the memory 104 is included in the processing chip 101. Additionally and/or alternatively, memory 104 may be located external to processing chip 101.
  • Processor 102 may control memory 104 and/or transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein.
  • the processor 102 may process information in the memory 104 to generate first information/signal and transmit a wireless signal including the first information/signal through the transceiver 106.
  • the processor 102 may receive a wireless signal including the second information/signal through the transceiver 106 and store information obtained by processing the second information/signal in the memory 104.
  • Memory 104 may be operatively coupled to processor 102. Memory 104 may store various types of information and/or instructions. Memory 104 may store software code 105 that, when executed by processor 102, implements instructions that perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. For example, software code 105 may, when executed by processor 102, implement instructions that perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. For example, software code 105 may control processor 102 to perform one or more protocols. For example, software code 105 may control processor 102 to perform one or more air interface protocol layers.
  • the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement RAT (eg, LTE or NR).
  • Transceiver 106 may be coupled to processor 102 to transmit and/or receive wireless signals via one or more antennas 108.
  • Each transceiver 106 may include a transmitter and/or receiver.
  • the transceiver 106 can be used interchangeably with a radio frequency (RF) unit.
  • the first wireless device 100 may represent a communication modem/circuit/chip.
  • the second wireless device 200 may include at least one transceiver, such as transceiver 206, at least one processing chip, such as processing chip 201, and/or one or more antennas 208.
  • the processing chip 201 may include at least one processor, such as processor 202, and at least one memory, such as memory 204.
  • processor 202 may include at least one processor, such as processor 202, and at least one memory, such as memory 204.
  • memory 204 is included in the processing chip 201. Additionally and/or alternatively, memory 204 may be located external to processing chip 201.
  • Processor 202 may control memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein.
  • the processor 202 may process information in the memory 204 to generate third information/signal and transmit a wireless signal including the third information/signal through the transceiver 206.
  • the processor 202 may receive a wireless signal including the fourth information/signal through the transceiver 206, and store information obtained by processing the fourth information/signal in the memory 204.
  • Memory 204 may be operatively coupled to processor 202. Memory 204 may store various types of information and/or instructions. Memory 204 may store software code 205 that, when executed by processor 202, implements instructions that perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. For example, software code 205 may, when executed by processor 202, implement instructions that perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. For example, software code 205 may control processor 202 to perform one or more protocols. For example, software code 205 may control processor 202 to perform one or more air interface protocol layers.
  • the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement RAT (eg, LTE or NR).
  • Transceiver 206 may be coupled to processor 202 to transmit and/or receive wireless signals via one or more antennas 208.
  • Each transceiver 206 may include a transmitter and/or receiver.
  • the transceiver 206 can be used interchangeably with the RF unit.
  • the second wireless device 200 may represent a communication modem/circuit/chip.
  • one or more protocol layers may be implemented by one or more processors 102, 202.
  • one or more processors 102, 202 may operate on one or more layers (e.g., a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, Functional layers such as radio resource control (RRC) layer and service data adaptation protocol (SDAP) layer) can be implemented.
  • layers e.g., a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, Functional layers such as radio resource control (RRC) layer and service data adaptation protocol (SDAP) layer
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • One or more processors 102, 202 generate one or more protocol data units (PDUs) and/or one or more service data units (SDUs) according to the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. can do.
  • One or more processors 102, 202 may generate messages, control information, data or information in accordance with the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein.
  • One or more processors 102, 202 may process signals (e.g., baseband) containing PDUs, SDUs, messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • transceivers 106, 206 can be generated and provided to one or more transceivers (106, 206).
  • One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, and the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • signals e.g., baseband signals
  • One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, and/or microcomputer.
  • One or more processors 102, 202 may be implemented by hardware, firmware, software, and/or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gates
  • firmware and/or software may be implemented using firmware and/or software, and firmware and/or software may be implemented to include modules, procedures and functions.
  • Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein may be included in one or more processors (102, 202) or stored in one or more memories (104, 204). It may be driven by the above processors 102 and 202.
  • the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
  • One or more memories 104, 204 may be connected to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and/or instructions.
  • One or more memories 104, 204 may include read-only memory (ROM), random access memory (RAM), erasable programmable ROM (EPROM), flash memory, hard drives, registers, cache memory, computer readable storage media, and/or these. It may be composed of a combination of .
  • One or more memories 104, 204 may be located internal to and/or external to 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.
  • One or more transceivers 106, 206 may transmit user data, control information, wireless signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein to one or more other devices. .
  • One or more transceivers 106, 206 may receive user data, control information, wireless signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein from one or more other devices. there is.
  • one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive wireless signals.
  • one or more processors 102 and 202 may control one or more transceivers 106 and 206 to transmit user data, control information, wireless signals, etc. to one or more other devices. Additionally, one or more processors 102 and 202 may control one or more transceivers 106 and 206 to receive user data, control information, wireless signals, etc. from one or more other devices.
  • One or more transceivers (106, 206) may be connected to one or more antennas (108, 208).
  • One or more transceivers (106, 206) transmit, through one or more antennas (108, 208), user data, control information, and wireless signals/channels referred to in the descriptions, functions, procedures, proposals, methods, and/or operational flow diagrams disclosed herein. It can be set to send and receive, etc.
  • one or more antennas 108 and 208 may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • One or more transceivers (106, 206) process the received user data, control information, wireless signals/channels, etc. using one or more processors (102, 202). etc. can be converted from an RF band signal to a baseband signal.
  • One or more transceivers (106, 206) may convert user data, control information, wireless signals/channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals.
  • one or more transceivers 106, 206 may include an (analog) oscillator and/or filter.
  • one or more transceivers (106, 206) up-convert an OFDM baseband signal to an OFDM signal through an (analog) oscillator and/or filter under the control of one or more processors (102, 202). , the up-converted OFDM signal can be transmitted at the carrier frequency.
  • One or more transceivers (106, 206) receive an OFDM signal at a carrier frequency and, under the control of one or more processors (102, 202), down-convert the OFDM signal to an OFDM baseband signal via an (analog) oscillator and/or filter ( down-convert).
  • the UE may operate as a transmitting device in the uplink (UL) and as a receiving device in the downlink (DL).
  • the base station may operate as a receiving device in the UL and as a transmitting device in the DL.
  • the first wireless device 100 operates as a UE and the second wireless device 200 operates as a base station.
  • a processor 102 connected to, mounted on, or released from the first wireless device 100 may perform UE operations according to implementations herein or may use transceiver 106 to perform UE operations according to implementations herein. It can be configured to control.
  • the processor 202 connected to, mounted on, or released from the second wireless device 200 is configured to perform a base station operation according to an implementation of the present specification or to control the transceiver 206 to perform a base station operation according to the implementation of the present specification. It can be.
  • the base station may be referred to as Node B (Node B), eNode B (eNB), or gNB.
  • Node B Node B
  • eNB eNode B
  • gNB gNode B
  • FIG 3 shows an example of a wireless device to which implementations of the present disclosure are applied.
  • Wireless devices may be implemented in various forms depending on usage examples/services (see Figure 1).
  • wireless devices 100 and 200 may correspond to the wireless devices 100 and 200 of FIG. 2 and may be configured by various components, devices/parts and/or modules.
  • each wireless device 100, 200 may include a communication device 110, a control device 120, a memory device 130, and additional components 140.
  • Communication device 110 may include communication circuitry 112 and a transceiver 114.
  • communication circuitry 112 may include one or more processors 102, 202 of FIG. 2 and/or one or more memories 104, 204 of FIG. 2.
  • transceiver 114 may include one or more transceivers 106, 206 of FIG. 2 and/or one or more antennas 108, 208 of FIG. 2.
  • the control device 120 is electrically connected to the communication device 110, the memory device 130, and the additional component 140, and controls the overall operation of each wireless device 100 and 200. For example, the control device 120 may control the electrical/mechanical operation of each wireless device 100 and 200 based on the program/code/command/information stored in the memory device 130.
  • the control device 120 transmits the information stored in the memory device 130 to the outside (e.g., other communication devices) via the communication device 110 through a wireless/wired interface, or to a communication device ( Information received from the outside (e.g., other communication devices) via 110) may be stored in the memory device 130.
  • Additional components 140 may be configured in various ways depending on the type of wireless device 100 or 200.
  • additional components 140 may include at least one of a power unit/battery, an input/output (I/O) device (e.g., an audio I/O port, a video I/O port), a drive device, and a computing device.
  • I/O input/output
  • the wireless devices 100 and 200 are not limited thereto, but may include robots (100a in FIG. 1), vehicles (100b-1 and 100b-2 in FIG. 1), XR devices (100c in FIG. 1), and portable devices (100c in FIG. 1). 100d), home appliances (100e in FIG. 1), IoT devices (100f in FIG.
  • the wireless devices 100 and 200 can be used in mobile or fixed locations depending on the usage/service.
  • all of the various components, devices/parts, and/or modules of the wireless devices 100 and 200 may be connected to each other through a wired interface, or at least a portion may be connected wirelessly through the communication device 110 .
  • the control device 120 and the communication device 110 are connected by wire, and the control device 120 and the first device (e.g., 130 and 140) are communication devices. It can be connected wirelessly through (110).
  • Each component, device/part and/or module within the wireless devices 100, 200 may further include one or more elements.
  • the control device 120 may be configured by a set of one or more processors.
  • control device 120 may be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphics processing unit, and a memory control processor.
  • AP application processor
  • ECU electronice control unit
  • the memory device 130 may be comprised of RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and/or a combination thereof.
  • Figure 4 shows the implementation of the present specification applied of U.E. Shows an example.
  • UE 100 may correspond to the first wireless device 100 of FIG. 2 and/or the wireless device 100 or 200 of FIG. 3.
  • UE 100 includes a processor 102, memory 104, transceiver 106, one or more antennas 108, power management module 110, battery 112, display 114, keypad 116, and SIM.
  • SIM subscriber identification module
  • Processor 102 may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. Processor 102 may be configured to control one or more other components of UE 100 to implement the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. A layer of air interface protocols may be implemented in processor 102. Processor 102 may include an ASIC, other chipset, logic circuitry, and/or data processing devices. Processor 102 may be an application processor. The processor 102 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modem (modulator and demodulator).
  • DSP digital signal processor
  • CPU central processing unit
  • GPU graphics processing unit
  • modem modulator and demodulator
  • processor 102 examples include SNAPDRAGONTM series processors made by Qualcomm®, EXYNOSTM series processors made by Samsung®, A series processors made by Apple®, HELIOTM series processors made by MediaTek®, ATOMTM series processors made by Intel®, or corresponding next generation processors. It can be found in the processor.
  • the memory 104 is operatively coupled to the processor 102 and stores various information for operating the processor 102.
  • Memory 104 may include ROM, RAM, flash memory, memory cards, storage media, and/or other storage devices.
  • modules e.g., procedures, functions, etc.
  • Modules may be stored in memory 104 and executed by processor 102.
  • Memory 104 may be implemented within processor 102 or external to processor 102, in which case it may be communicatively coupled to processor 102 through various methods known in the art.
  • Transceiver 106 is operatively coupled to processor 102 and transmits and/or receives wireless signals.
  • Transceiver 106 includes a transmitter and a receiver.
  • Transceiver 106 may include baseband circuitry for processing radio frequency signals.
  • the transceiver 106 controls one or more antennas 108 to transmit and/or receive wireless signals.
  • Power management module 110 manages power of processor 102 and/or transceiver 106. Battery 112 supplies power to power management module 110.
  • Display 114 outputs results processed by processor 102.
  • Keypad 116 receives input for use by processor 102. Keypad 116 may be displayed on display 114 .
  • SIM card 118 is an integrated circuit for securely storing an international mobile subscriber identity (IMSI) and associated keys, and is used to identify and authenticate subscribers in cellular devices such as cell phones or computers. You can also store contact information on many SIM cards.
  • IMSI international mobile subscriber identity
  • the speaker 120 outputs sound-related results processed by the processor 102.
  • Microphone 122 receives sound-related input for use by processor 102.
  • FIGS 5a and 5b are through the PC5 reference point.
  • ProSe Direct communication Unicast in mode It represents the Layer-2 link establishment procedure.
  • UE(s) determines the destination Layer-2 ID for signal reception for PC5 unicast link setup.
  • the ProSe application layer of UE-1 provides application information for PC5 unicast communication.
  • Application information includes ProSe service information and the UE's Application Layer ID.
  • the Application Layer ID of the target UE may be included in the application information.
  • the ProSe application layer of UE-1 can provide ProSe application requirements for this unicast communication.
  • UE-1 determines PC5 QoS parameters and PFI.
  • the UE If UE-1 decides to reuse the existing PC5 unicast link, the UE triggers a Layer-2 link modification procedure.
  • UE-1 begins the unicast Layer-2 link establishment procedure by sending a Direct Communication Request message.
  • the Direct Communication Request message includes:
  • Application Layer ID of the initiating UE i.e., Application Layer ID of UE-1
  • Target user information Application Layer ID of target UE (e.g. Application Layer ID of UE-2).
  • ProSe service information Information about the ProSe identifier requesting Layer-2 link establishment.
  • the target Layer-2 ID may be a broadcast or unicast Layer-2 ID. If unicast Layer-2 ID is used, target user information must be included in the Direct Communication Request message.
  • UE-1 sends a communication request message directly via PC5 broadcast or unicast using the source Layer-2 ID and destination Layer-2 ID.
  • the default PC5 DRX configuration can be used to send and receive this message.
  • target user information is included in the Direct Communication Request message
  • the target UE that is, UE-2, responds by establishing security with UE-1.
  • target user information is not included in the Direct Communication Request message
  • the UE that wishes to use the ProSe service announced through the PC5 unicast link with UE-1 responds by establishing security with UE-1.
  • UE-1 When security protection is activated, UE-1 sends the following information to the target UE:
  • IP address configuration For IP communication, this link requires an IP address configuration, which represents one of the following values:
  • DHCPv4 server if the initiating UE supports only the IPv4 address allocation mechanism (i.e. acts as a DHCPv4 server), or
  • IPv6 router If the initiating UE supports only the IPv6 address allocation mechanism, i.e. acts as an IPv6 router.
  • IPv4 or IPv6 address allocation mechanism is not supported by the initiating UE.
  • PC5 QoS information Information about PC5 QoS flow.
  • PC5 QoS parameters e.g. PQI and conditional other parameters (e.g. MFBR/GFBR, etc.)
  • ProSe identifier(s) optionally the associated ProSe identifier(s).
  • the target Layer-2 ID is set to the source Layer-2 ID of the received direct communication request message.
  • UE-1 upon receiving the security setup procedure message, acquires the Layer-2 ID of the peer UE for future communication for signaling and data traffic for this unicast link.
  • the target UE that has successfully established security with UE-1 sends a Direct Communication Accept message to UE-1:
  • UE-2 If target user information is included in the Direct Communication Request message and the Application Layer ID of the target UE, that is, UE-2, matches, UE-2 responds with a Direct Communication Accept message.
  • the Direct Communication Accept message includes:
  • Source user information Application layer ID of the UE transmitting the Direct Communication Accept message.
  • PC5 QoS information Information about PC5 QoS flows. For each PC5 QoS Flow, the PFI requested by UE-1, the corresponding PC5 QoS parameters (i.e., parameters conditional on the PQI (e.g., MFBR/GFBR, etc.)), and optionally the relevant ProSe identifier(s) are included.
  • PC5 QoS parameters i.e., parameters conditional on the PQI (e.g., MFBR/GFBR, etc.)
  • ProSe identifier(s) optionally the relevant ProSe identifier(s)
  • IP address configuration For IP communication, this link requires an IP address configuration, which represents one of the following values:
  • DHCPv4 server if the target UE only supports IPv4 address allocation mechanism, i.e. acts as a DHCPv4 server;
  • IPv6 router if the target UE only supports the IPv6 address allocation mechanism, i.e. acts as an IPv6 router, or
  • the target UE does not support the IPv6 IP address allocation mechanism, that is, the IP address configuration indicates “Address allocation not supported” and UE-1 enters the link-local IPv6 address in the Direct Communication Request message. If included, it is a locally formed link-local IPv6 address. The target UE must contain a non-conflicting link-local IPv6 address.
  • both UEs i.e., initiating UE and destination UE
  • link-local IPv6 addresses they must disable duplicate address detection.
  • the corresponding address configuration procedure is performed after the layer 2 link is established, and link-local IPv6 addresses are ignored.
  • the ProSe layer of the UE that has set up the PC5 unicast link transmits the PC5 link identifier assigned to the unicast link and PC5 unicast link-related information to the AS layer.
  • PC5 unicast link-related information includes layer-2 ID information (e.g., source layer-2 ID and destination layer-2 ID). This allows the AS layer to maintain the PC5 link identifier along with PC5 unicast link-related information.
  • Two UEs can negotiate PC5 DRX configuration at the AS layer, and PC5 DRX parameter values can be configured for each source and destination Layer-2 ID pair at the AS layer.
  • ProSe data is transmitted over a unicast link established as follows:
  • the PC5 link identifier and PFI are provided to the AS layer along with ProSe data.
  • layer-2 ID information (e.g. source Layer-2 ID and target Layer-2 ID) is additionally provided to the AS layer.
  • UE-1 has a source Layer-2 ID (i.e., UE-1's Layer-2 ID for this unicast link) and a destination Layer-2 ID (i.e., peer UE's Layer-2 ID for this unicast link). Transmit ProSe data using .
  • a source Layer-2 ID i.e., UE-1's Layer-2 ID for this unicast link
  • a destination Layer-2 ID i.e., peer UE's Layer-2 ID for this unicast link.
  • UE-1's peer UE can transmit ProSe data to UE-1 through the unicast link with UE-1.
  • Figure 6 shows the layer-2 release procedure through the PC5 reference point.
  • a unicast link is established between UE-1 and UE-2.
  • UE-1 sends a Disconnect Request message to UE-2 to release the Layer-2 link and deletes all context data related to the Layer-2 link.
  • the Disconnect Request message includes security information.
  • UE-2 upon receiving the Disconnect Request message, responds with a Disconnect Response message and deletes all context data associated with the Layer-2 link.
  • the Disconnect Response message includes security information.
  • the ProSe layer of each UE notifies the AS layer that the unicast link has been released.
  • the ProSe layer uses the PC5 link identifier to indicate a released unicast link. This allows the AS layer to delete the context associated with the released unicast link.
  • the 5G ProSe remote UE After connecting to the 5G ProSe UE-to-Network Relay, the 5G ProSe remote UE continues to measure the signal strength of the 5G ProSe UE-to-Network Relay and PC5 unicast link for relay reselection.
  • the UE-to-Network Relay may be a Layer-2 UE-to-Network Relay or a Layer-3 UE-to-Network Relay.
  • TS 23.304 V17.3.0 please refer to TS 23.304 V17.3.0.
  • the UE can receive connection services from the network in the following manner.
  • UE receives services directly from the network without going through the UE-to-Network Relay.
  • UE receives services from the network indirectly through UE-to-Network Relay.
  • the UE receives network connection services through one or more Layer-2 UE-to-Network Relays and simultaneously receives network connection services through a direct path.
  • the UE receives network connection services through two or more Layer-2 UE-to-Network Relays.
  • the UE Even when the UE receives network connection service through Layer-2 UE-to-Network Relay, it can perform RRC operation and NAS operation with NG-RAN and core network (via Layer-2 UE-to-Network Relay). .
  • the UE uses 3GPP access (i.e., the Uu interface between the UE and NG-RAN in the case of direct path, and the Uu interface between Layer-2 UE-to-Network Relay and NG-RAN in the case of indirect path) It has multiple RRC connections and NAS connections, and conventionally this was not allowed.
  • FIGS 7 to 10 show a scenario in which a UE receives a service from a network through two paths (Direct Path or Indirect Path).
  • Figure 7 shows that the Direct Path and Indirect Path are one and the same. NG -via RAN To U.E. Indicates the serviced scenario.
  • Figure 8 shows that two different Indirect Paths are connected to one same NG -via RAN To U.E. Indicates the serviced scenario.
  • Figure 9 shows that Direct Path and Indirect Path are two different NG -via RAN To U.E. Indicates the serviced scenario.
  • Figure 10 shows that two different Indirect Paths are connected to two different Indirect Paths.
  • connection/communication between the UE and the network on the path is 3GPP access (i.e., Uu interface). That is, in the case of the direct path, the connection/communication between the UE and the network is done through 3GPP access, and in the case of the indirect path, the connection/communication between the UE-to-Network Relay and the network is done through 3GPP access. It comes true.
  • Direct Path direct network communication path
  • Indirect Path indirect network communication path
  • Multi-path support can improve communication stability and throughput. Multiple paths can be utilized simultaneously. Switching between multiple paths may also be possible.
  • a UE can be connected to the same gNB using one Direct Path and one Indirect Path (Indirect Path through a Layer-2 UE-to-Network relay or another UE).
  • Direct Path Through a Layer-2 UE-to-Network relay or another UE.
  • Indirect Path through a Layer-2 UE-to-Network relay or another UE.
  • the solution for Layer-2 UE-to-Network relay can be reused for another UE.
  • the Indirect Path is basically assumed to pass through Layer-2 UE-to-Network Relay.
  • both paths must be able to connect to the same base station.
  • the serving cell of the Remote UE related to the direct path and the serving cell of the Relay UE related to the indirect path may be different.
  • AMF may require location information for each path for remote UEs that configure multi-path. . Therefore, in the process of remote UE configuring multipath with NG-RAN, a method is needed to inform AMF of location information for each path.
  • a method of informing the AMF of information about the serving cell each time the remote UE creates each path in the process of configuring a multipath may be proposed.
  • the method proposed herein may consist of a combination of one or more of the following operations/configurations/steps.
  • indirect network communication assumes receiving a network connection service through Layer-2 UE-to-Network Relay.
  • the method proposed in this specification can be extended and applied even when receiving a network connection service through Layer-3 UE-to-Network Relay in the case of indirect network communication.
  • the path is through NG-RAN (this may correspond to only the gNB, or both gNB and ng-eNB).
  • NG-RAN this may correspond to only the gNB, or both gNB and ng-eNB.
  • the method proposed in this specification can also be extended to paths through non-3GPP access.
  • a path may mean a communication path, routing path, connection path, etc.
  • UE User Equipment
  • terminal terminal
  • UE-to-Network Relay ProSe UE-to-Network Relay
  • Relay Relay
  • Relay UE UE-NW Relay
  • 5G ProSe UE-to-Network Relay 5G ProSe UE-to-NW Relay
  • 5G ProSe UE-to-Network Relay 5G ProSe UE-to-NW Relay
  • 5G ProSe UE-to-Network Relay UE etc.
  • Remote UE 5G Remote UE, etc. are used interchangeably.
  • each path has a different section between the UE and NG-RAN, and that there is no difference between the paths in the subsequent section, that is, the section between NG-RAN and 5G CN.
  • the path between NG-RAN and 5G CN (which is a control plane-related path and/or a data plane-related path) is different.
  • the proposed operation can be interpreted as being performed or supported when the remote UE uses the relay UE for multipath purposes/purposes.
  • One or more of the following assumptions/premises may be required for the proposed operation.
  • the Remote UE and Relay UE specify that the Relay UE supports an indirect path for the Remote UE for multipath use/purpose through Relay Discovery operation and/or PC5 unicast link formation/modification operation and/or message exchange with the network. They may recognize each other in explicit or implicit ways.
  • the base station can explicitly or implicitly recognize that the remote UE uses an indirect path for multipath purposes/purposes.
  • the names of the new IE (Information Element) and parameters proposed in this specification are examples, and other names may be used for the same purpose (e.g., Additional Path Information or Multiple Path Information instead of Secondary Path Information, etc.).
  • Figure 11 shows the first In the example indicating the procedure followed This is an example too .
  • the remote UE can first create a direct path and then create an indirect path through the U2N (UE to Network) Relay UE. That is, multiple paths may be created.
  • the base station NG-RAN
  • the base station can inform the AMF of the remote UE's Uu serving cell and the U2N relay's serving cell information.
  • the base station can inform the AMF of information about the serving cell for the first path created by the remote UE and information about the serving cell for the second path created by the remote UE.
  • the first created path may be a direct path
  • the second created path may be an indirect path.
  • the remote UE's Uu serving cell may be a serving cell related to the remote UE's direct path.
  • Step 1 Remote UE can create an RRC connection with NG-RAN.
  • RRC connection may be through a direct path between Remote UE and NG-RAN.
  • Remote UE can create a first path with NG-RAN.
  • the first path may be a direct path.
  • Remote UE can first access NG-RAN through a direct path. In this process, the Remote UE can send a Registration Request message to the NG-RAN to register in the network.
  • Step 2 NG-RAN can deliver the registration request message received from the remote UE in Step 1 to the AMF through the Initial UE Message message.
  • user location information including Uu serving cell information (e.g., NR CGI (Cell Global Identifier) and TAI (Tracking Area Identity)) where the remote UE is currently located can be transmitted to the AMF.
  • Uu serving cell information e.g., NR CGI (Cell Global Identifier) and TAI (Tracking Area Identity)
  • NG-RAN can transmit information about the first path to AMF.
  • Information about the first path may be Uu serving cell information of the remote UE.
  • Step 3 The remaining steps during the registration process can be performed in accordance with Clause 4.2.2.2 in TS 23.502 V17.5.0.
  • Step 4 Remote UE can discover and select U2N relay UE to use the indirect path. In particular, you can select a U2N relay UE that can reach the NG-RAN serving the direct path created in Step 1.
  • Step 5 The Remote UE may perform a new PC5 connection establishment procedure with the U2N relay UE selected in Step 4.
  • Remote UE can create a second path with NG-RAN.
  • the second path may be an indirect path.
  • the contents of FIGS. 5A and 5B may be applied.
  • Step 6 Remote UE can attempt RRC connection creation or path addition procedure toward NG-RAN through an indirect path using the U2N Relay UE selected in Step 4.
  • Path addition can be performed by adding an indirect path to the RRC connection created in Step 1.
  • Step 7 NG-RAN extends the conventional NGAP (NG Application Protocol) message (e.g., Location Report) or uses a newly defined NGAP message to provide AMF with a secondary path to the Remote UE (i.e. It can be notified that an indirect path) has been created.
  • NG-RAN performs one of the following procedures or several procedures to deliver to AMF the serving cell information (e.g., NR CGI and TAI) of the U2N relay UE currently used in the second path to the remote UE. Two procedures can be performed together.
  • NGAP NG Application Protocol
  • NG-RAN performs one of the following procedures or several procedures to deliver to AMF the serving cell information (e.g., NR CGI and TAI) of the U2N relay UE currently used in the second path to the remote UE. Two procedures can be performed together.
  • - NG-RAN can define a new IE containing the serving cell information of the U2N relay UE and notify it to the AMF.
  • the conventional User Location Information IE defined in TS 38.413 V16.10.0 is used as a direct path.
  • indirect path can be assigned respectively.
  • “UE location information for multi-path” IE can be defined as shown in Table 3 and the Path Type IE can be different for each and notified to AMF.
  • NG-RAN can transmit information about the second path to AMF.
  • Information about the second path may be serving cell information of the U2N relay UE.
  • Table 3 shows UE Location Information for Multi-path.
  • NG-RAN can transmit User Location Information with Path Type 'direct' to AMF.
  • NG-RAN can transmit User Location Information with Path Type 'indirect' to AMF.
  • NG-RAN can transmit User Location Information without information about Path Type to AMF.
  • NG-RAN can transmit User Location Information with Path Type 'indirect' to AMF. Then, the AMF can recognize that a multi-path has been established for the remote UE and know that the User Location Information in step 2 is for the direct path.
  • the conventional User Location Information IE can be used in Step 2 and Step 7.
  • the Semantics description specifies whether the corresponding UE location information information is for a direct path or an indirect path. can be announced.
  • the Path Type related information may not be specified/included in the case of a direct path, but may be specified/included only in the case of an indirect path.
  • the conventional User Location Information IE defined in TS 38.413 V16.10.0, it is also possible for NG-RAN to inform the AMF of the serving cell information of the U2N relay UE. If the conventional User Location Information IE is expanded, the serving cell information of the U2N relay UE used in the secondary path to the remote UE may be included in the PSCell Information IE and delivered to the AMF, or the user Within the Location Information IE, a new IE (e.g., Secondary Path Information) can be defined and delivered as shown in Table 4.
  • a new IE e.g., Secondary Path Information
  • NG-RAN includes information about the Path Type to inform whether the Secondary Path Information information is for a direct path or an indirect path (instead of including information about the Path Type within the Secondary Path Information) ) Secondary Path Information
  • This can also be specified in the Semantics description of IE.
  • the above path type related information may not be specified/included in the case of a direct path, but may be specified/included only in the case of an indirect path.
  • Table 4 shows User Location Information. This IE can be used to provide location information of the UE.
  • YES ignore >N3IWF user location information >>IP Address M Transport Layer Address 9.3.2.4 UE's local IP address used to reach the N3IWF - >>Port Number O OCTET STRING(SIZE(2)) UDP or TCP source port number if NAT is detected. - >TNGF user location information YES ignore >>TNAP ID M OCTET STRING TNAP Identifier used to identify the TNAP. Details in TS 29.571 [35].
  • Table 5 shows Secondary Path Information.
  • Secondary Path Information may include NR CGI, TAI, and Path Type.
  • Path Type-related information may not be specified/included in the case of a direct path, but may be specified/included only in the case of an indirect path.
  • NG-RAN may trigger Step 7 immediately after Step 6 to inform AMF of location information for the second path, but NG-RAN may trigger NGAP signaling to AMF for other purposes while having the location information obtained in Step 6.
  • sending for example, PDU Session Resource Modify Response, UE Context Modification Response, Uplink NAS Transport, etc.
  • AMF can see that multipath is currently supported for remote UE based on the UE Location Information received from NG-RAN in Step 2 and Step 7.
  • AMF can know the location information of the Remote UE according to each path, and can deliver the information to NFs that need it (e.g., SMF, PCF, etc.). For example, through location information about multipath received from NG-RAN, the network can separately charge the corresponding terminal according to multipath use.
  • Figure 12 shows the second In the example indicating the procedure followed This is an example too .
  • Remote UE can first create an indirect path through the U2N Relay UE and then create a direct path. That is, multiple paths may be created.
  • the base station NG-RAN
  • the base station can inform the AMF of the remote UE's Uu serving cell and the U2N relay's serving cell information.
  • the base station can inform the AMF of information about the serving cell for the first path created by the remote UE and information about the serving cell for the second path created by the remote UE.
  • the first created path may be an indirect path
  • the second created path may be a direct path.
  • Step 1 Remote UE can discover and select U2N relay UE to use the indirect path.
  • Remote UE can first access NG-RAN through an indirect path.
  • Remote UE can create a first path with NG-RAN.
  • the first path may be an indirect path.
  • Step 2 The Remote UE may perform a new PC5 connection establishment procedure with the U2N relay UE selected in Step 1.
  • the contents of FIGS. 5A and 5B may be applied.
  • Step 3 Remote UE can create an RRC connection with NG-RAN through an indirect path using the U2N Relay UE selected in Step 1. In this process, the Remote UE can transmit a Registration Request message to the NG-RAN in order to register in the network.
  • Remote UE can create an RRC connection with NG-RAN.
  • RRC connection may be through an indirect path by a relay UE between the Remote UE and NG-RAN.
  • Step 4 NG-RAN can deliver the registration request message received from the remote UE in Step 3 to the AMF through the Initial UE Message message.
  • the current location information of the remote UE that is, user location information including information about the serving cell of the U2N relay UE (for example, NR CGI and TAI)
  • the information can be delivered to the AMF using the NR CGI IE and TAI IE included in the NR user location information IE in the conventional User Location Information IE.
  • Information about the first path may be information about the serving cell of the U2N relay UE.
  • Step 5 The remaining steps in the registration process can be performed according to Clause 4.2.2.2 in TS 23.502 V17.5.0.
  • Step 6 If the remote UE can reach the NG-RAN serving the indirect path created in Step 3 through the Uu serving cell where it is currently staying, the remote UE creates an RRC connection or path toward the NG-RAN through the direct path. You can try the Path Addition procedure. Path addition can be performed by adding a direct path to the RRC connection created in Step 3.
  • Step 7 NG-RAN extends the conventional NGAP (NG Application Protocol) message (e.g., Location Report) or uses a newly defined NGAP message to provide AMF with a secondary path to the Remote UE (i.e. It can be notified that a direct path) has been created. Additionally, in order to transmit Uu serving cell information (e.g., NR CGI and TAI) for the current Remote UE to the AMF, NG-RAN may perform one of the following procedures or multiple procedures together.
  • NGAP NG Application Protocol
  • Uu serving cell information e.g., NR CGI and TAI
  • - NG-RAN can define a new IE containing Uu serving cell information for the remote UE and notify the AMF.
  • the conventional User Location Information IE defined in TS 38.413 V16.10.0 is used as a direct path.
  • indirect path can be assigned respectively.
  • “UE location information for multi-path” IE can be defined as shown in Table 3 and the Path Type IE can be different for each and notified to AMF.
  • NG-RAN can transmit information about the second path to AMF.
  • Information about the second path may be Uu serving cell information of the remote UE.
  • NG-RAN can transmit User Location Information with Path Type 'indirect' to AMF.
  • NG-RAN can transmit User Location Information with Path Type 'direct' to AMF.
  • NG-RAN can transmit User Location Information without information about Path Type to AMF.
  • NG-RAN can transmit User Location Information with Path Type 'direct' to AMF. Then, the AMF can recognize that a multi-path has been established for the remote UE, and can know that the User Location Information in step 4 is for the indirect path.
  • the conventional User Location Information IE can be used in Step 4 and Step 7.
  • the Semantics description specifies whether the corresponding UE location information information is for a direct path or an indirect path. can be announced.
  • the Path Type related information may not be specified/included in the case of a direct path, but may be specified/included only in the case of an indirect path.
  • the conventional User Location Information IE defined in TS 38.413 V16.10.0, it is also possible for NG-RAN to inform AMF of Uu serving cell information for the direct path. If the conventional User Location Information IE is expanded, the Uu serving cell information used in the secondary path to the remote UE may be included in the PSCell Information IE and delivered to the AMF, or the User Location Information IE A new IE (e.g., Secondary Path Information) may be defined and transmitted as shown in Table 4.
  • NG-RAN includes information about the Path Type to inform whether the Secondary Path Information information is for a direct path or an indirect path (instead of including information about the Path Type within the Secondary Path Information) ) Secondary Path Information
  • This can also be specified in the Semantics description of IE.
  • the above path type related information may not be specified/included in the case of a direct path, but may be specified/included only in the case of an indirect path.
  • Secondary Path Information may include NR CGI, TAI, and Path Type.
  • Path Type-related information may not be specified/included in the case of a direct path, but may be specified/included only in the case of an indirect path.
  • NG-RAN transmits the serving cell information for the indirect path by including it in the NG CGI IE and TAI IE within the NR user location information IE within the conventional User Location Information IE, while in Step 7, it is transmitted in the indirect path. It is also possible to transmit the serving cell information by including it in the newly defined Relay cell information IE, and the serving cell information about the direct path by including it in the NG CGI IE and TAI IE within the existing NR user location information IE.
  • NG-RAN transmits information about the Uu serving cell related to the direct path by including it in the NG CGI IE and TAI IE within the existing NR user location information IE, and transmits it in the indirect path.
  • Serving cell information can be transmitted by including it in the newly defined Relay cell information IE.
  • serving cell information about the indirect path can be transmitted by including it in the NG CGI IE and TAI IE within the existing NR user location information IE.
  • Table 6 shows User Location Information to which the aforementioned relay cell information has been added.
  • Table 7 shows relay cell information.
  • NG-RAN may trigger Step 7 immediately after Step 6 to inform AMF of location information for the second path, but NG-RAN may trigger NGAP signaling to AMF for other purposes while having the location information obtained in Step 6.
  • sending for example, PDU Session Resource Modify Response, UE Context Modification Response, Uplink NAS Transport, etc.
  • AMF can see that multipath is currently supported for remote UE based on the UE Location Information received from NG-RAN in Step 4 and Step 7.
  • AMF can know the location information of the Remote UE according to each path, and can deliver the information to NFs that need it (e.g., SMF, PCF, etc.). For example, through location information about multipath received from NG-RAN, the network can proceed with separate charging for the corresponding terminal according to the use of the weighted path.
  • Figure 13 shows the third In the example indicating the procedure followed This is an example too .
  • the remote UE can switch to single-path transmission by releasing the direct path or indirect path.
  • the NG-RAN can inform the AMF of the Remote UE's location information (i.e., Uu serving cell or U2N relay serving cell information) for the remaining path that is not currently released.
  • the third embodiment can be performed.
  • Step 1 Remote UE can exchange data with the network by configuring multipath according to the procedure in FIG. 11 or FIG. 12.
  • Step 2 Remote UE or NG-RAN may decide to release the connection through the direct path or indirect path and switch to single path transmission. If the direct path is released and only the indirect path is left, Step 2a can be executed. Alternatively, step 2b can be executed if the indirect path is released and only the direct path is left. Alternatively, regardless of the path type (i.e., direct path or indirect path) to be released, the remote UE may transmit an RRC Connection Release message or Path Deletion message to a specific path.
  • the path type i.e., direct path or indirect path
  • Step 3 NG-RAN provides location information on the remaining path that is not currently released (e.g., if the direct path is released, serving cell information of the U2N relay UE, if the indirect path is released, Uu serving cell information) It can be delivered to AMF by including it in the conventional User Location Information IE.
  • the AMF that receives this can know that single-path transmission, not multi-path transmission, has begun for the remote UE, and can notify the surrounding NFs (e.g. SMF, PCF, etc.) of this.
  • the AMF may transmit the ULI information to another network node (e.g., PCF, SMF, etc.).
  • another network node e.g., PCF, SMF, etc.
  • AMF can always transmit ULI information to other network nodes.
  • the AMF will only respond if the ULI information changes from its existing value (e.g., if the secondary path changes without changing the primary path, If both the first and second paths change, etc.), it can be transmitted to another network node.
  • the reason why the AMF transmits ULI information to another NF may be because the NF has subscribed to a service that receives ULI information through the AMF.
  • NG-RAN can accurately and quickly inform AMF of serving cell information for each path in the process of configuring multipath transmission for remote UE.
  • AMF can determine whether the remote UE is transmitting on a single path or on a multipath, and also transmits location information for each path to the relevant NF to perform additional operations (e.g., charging) according to the multipath.
  • Figure 14 shows the base station's procedures for the disclosure of this specification.
  • the base station can establish a Radio Resource Control (RRC) connection with a remote UE (User Equipment) through the primary path.
  • RRC Radio Resource Control
  • the base station may transmit information about the first path to the Access and Mobility management Function (AMF).
  • AMF Access and Mobility management Function
  • the base station can perform path addition to add a secondary path between the base station and the remote UE to the RRC connection.
  • the base station can transmit information about the second path to the AMF.
  • the first path may be one of a direct path and an indirect path through a relay UE.
  • the second path may be another of the direct path and the indirect path through the relay UE.
  • the first path may be a direct path.
  • the second path may be an indirect path.
  • the information about the first path may include Uu serving cell information of the remote UE.
  • Information about the second path may include serving cell information of the relay UE.
  • the Uu serving cell information of the remote UE may include CGI (Cell Global Identifier) and TAI (Tracking Area Identity) information.
  • CGI Cell Global Identifier
  • TAI Track Area Identity
  • the serving cell information of the relay UE may include CGI and TAI information.
  • the first path may be an indirect path.
  • the second path may be a direct path.
  • the information about the first path may include serving cell information of the relay UE.
  • Information about the second path may include Uu serving cell information of the remote UE.
  • the Uu serving cell information of the remote UE may include CGI (Cell Global Identifier) and TAI (Tracking Area Identity) information.
  • CGI Cell Global Identifier
  • TAI Track Area Identity
  • the serving cell information of the relay UE may include CGI and TAI information.
  • the information about the second path may include information indicating that the route addition is about the second path.
  • the information about the first path may include information indicating that the RRC connection is through the first path.
  • the base station may release the first path.
  • the base station may transmit information about the second path to the AMF.
  • the base station may release the second path.
  • the base station may transmit information about the first path to the AMF.
  • a base station may include a processor, transceiver, and memory.
  • a processor may be configured to be operably coupled with a memory and a transceiver.
  • the operations performed by the processor include: establishing a remote UE (User Equipment) and RRC (Radio Resource Control) connection through a primary path; Based on the establishment of the RRC connection, transmitting information about the first path to an Access and Mobility management Function (AMF); Performing path addition to add a secondary path between the base station and the remote UE to the RRC connection; Based on the path addition, transmitting information about the second path to the AMF, wherein the first path is one of a direct path and an indirect path through a relay UE. path, and the second path may be another path among a direct path and an indirect path through a relay UE.
  • AMF Access and Mobility management Function
  • the operations performed by the processor include: establishing a remote UE (User Equipment) and RRC (Radio Resource Control) connection through a primary path; Based on the establishment of the RRC connection, transmitting information about the first path to an Access and Mobility management Function (AMF); Performing path addition to add a secondary path between the base station and the remote UE to the RRC connection; Based on the path addition, transmitting information about the second path to the AMF, wherein the first path is one of a direct path and an indirect path through a relay UE. path, and the second path may be another path among a direct path and an indirect path through a relay UE.
  • AMF Access and Mobility management Function
  • the technical features of the present disclosure may be directly implemented in hardware, software executed by a processor, or a combination of the two.
  • a method performed by a wireless device may be implemented in hardware, software, firmware, or any combination thereof.
  • the software may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or other storage media.
  • storage media are coupled to the processor so that the processor can read information from the storage media.
  • the storage medium may be integrated into the processor.
  • the processor and storage media may reside in an ASIC.
  • the processor and storage medium may reside as separate components.
  • Computer-readable media can include tangible and non-volatile computer-readable storage media.
  • non-volatile computer-readable media may include random access memory (RAM), such as Synchronization Dynamic Random Access Memory (SDRAM), Read-Only Memory (ROM), and Non-Volatile Random Access Memory (NVRAM).
  • RAM random access memory
  • SDRAM Synchronization Dynamic Random Access Memory
  • ROM Read-Only Memory
  • NVRAM Non-Volatile Random Access Memory
  • EEPROM Read-only memory
  • flash memory magnetic or optical data storage media, or any other medium that can be used to store instructions or data structures.
  • Non-volatile computer-readable media may also include combinations of the above.
  • the methods described herein may be realized, at least in part, by a computer-readable communication medium that carries or conveys code in the form of instructions or data structures and that can be accessed, read, and/or executed by a computer.
  • a non-transitory computer-readable medium has one or more instructions stored thereon.
  • One or more stored instructions may be executed by the base station's processor.
  • the one or more stored commands include establishing a Radio Resource Control (RRC) connection with a remote UE (User Equipment) through a primary path; Based on the establishment of the RRC connection, transmitting information about the first path to an Access and Mobility management Function (AMF); Performing path addition to add a secondary path between the base station and the remote UE to the RRC connection; Based on the path addition, the AMF can be instructed to transmit information about the second path, and the first path is a direct path and an indirect path through a relay UE.
  • One of the paths, and the second path may be the other path among the direct path and the indirect path through the relay UE.
  • serving cell information for each path is transmitted to the AMF, so that the network can recognize multipath transmission.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un mode de réalisation de la présente divulgation concerne un procédé permettant d'effectuer une communication par un UE distant. Le procédé comprend les étapes consistant à : établir une connexion de commande de ressources radio (RRC) avec un équipement d'utilisateur (UE) distant par l'intermédiaire d'un trajet primaire ; transmettre des informations concernant le trajet primaire à une fonction de gestion d'accès et de mobilité (AMF) sur la base de l'établissement de la connexion de RRC ; effectuer un ajout de trajet impliquant l'ajout d'un trajet secondaire entre une station de base et l'UE distant à la connexion de RRC ; et transmettre les informations concernant le trajet secondaire à l'AMF sur la base de l'ajout de trajet, le trajet primaire étant un trajet parmi un trajet direct et un trajet indirect par l'intermédiaire d'un UE relais, et le trajet secondaire étant l'autre trajet parmi le trajet direct et le trajet indirect par l'intermédiaire de l'UE relais.
PCT/KR2023/013237 2022-09-14 2023-09-05 Procédé de gestion de trajets multiples WO2024058479A1 (fr)

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