WO2022035231A1 - Procédé de gestion de session - Google Patents

Procédé de gestion de session Download PDF

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Publication number
WO2022035231A1
WO2022035231A1 PCT/KR2021/010679 KR2021010679W WO2022035231A1 WO 2022035231 A1 WO2022035231 A1 WO 2022035231A1 KR 2021010679 W KR2021010679 W KR 2021010679W WO 2022035231 A1 WO2022035231 A1 WO 2022035231A1
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WIPO (PCT)
Prior art keywords
frequency band
network
information
measurement
handover
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PCT/KR2021/010679
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English (en)
Korean (ko)
Inventor
김석중
김래영
윤명준
쑤지안
변대욱
Original Assignee
엘지전자 주식회사
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Publication of WO2022035231A1 publication Critical patent/WO2022035231A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/24—Interfaces between hierarchically similar devices between backbone network devices

Definitions

  • This specification relates to mobile communication.
  • 3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communication. Many methods have been proposed to reduce costs for users and operators, which are LTE goals, to improve service quality, to expand coverage, and to increase system capacity. 3GPP LTE requires lower cost per bit, improved service availability, flexible use of frequency bands, simple structure, open interface, and proper power consumption of terminals as high-level requirements.
  • NR new radio
  • 3GPP identifies the necessary technical components to successfully standardize NR in a timely manner that meets both urgent market needs and the longer-term requirements set forth by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT)-2020 process. and should be developed Furthermore, NR must be able to use any spectral band up to at least 100 GHz which can be used for wireless communication even in the distant future.
  • ITU-R ITU radio communication sector
  • IMT international mobile telecommunications
  • NR targets a single technology framework that covers all deployment scenarios, usage scenarios and requirements, including enhanced mobile broadband (eMBB), massive machine type-communications (mMTC), ultra-reliable and low latency communications (URLLC), etc. do.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type-communications
  • URLLC ultra-reliable and low latency communications
  • NR must be forward compatible in nature.
  • a method for appropriately selecting a target cell supporting a specific frequency band in the handover process of the UE is a problem.
  • the terminal may transmit information on the frequency band to the network through the network.
  • the present specification may have various effects.
  • FIG. 1 shows an example of a communication system to which an implementation of the present specification is applied.
  • FIG. 2 shows an example of a wireless device to which the implementation of the present specification is applied.
  • FIG 3 shows an example of a wireless device to which the implementation of the present specification is applied.
  • FIG. 4 shows an example of a UE to which the implementation of the present specification is applied.
  • Radio Interface Protocol Radio Interface Protocol
  • FIG. 6 shows an example of a solution method for solving 5GC support cell selection support for accessing a network slice.
  • 10A and 10B show a fourth disclosure of the present specification.
  • FIG 11 shows the procedure of the first network for the second disclosure of the present specification.
  • multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, a system, and a single SC-FDMA (single) system. It includes a carrier frequency division multiple access) system, and a multicarrier frequency division multiple access (MC-FDMA) system.
  • CDMA may be implemented over a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
  • TDMA may be implemented through a radio technology 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 may be implemented through a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or E-UTRA (evolved UTRA).
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Wi-Fi
  • WiMAX WiMAX
  • IEEE 802.20 IEEE 802.20
  • E-UTRA evolved UTRA
  • UTRA is part of the universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long-term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA.
  • 3GPP LTE uses OFDMA in downlink (DL) and SC-FDMA in uplink (UL).
  • Evolution of 3GPP LTE includes LTE-A (advanced), LTE-A Pro, and/or 5G NR (new radio).
  • the implementation of the present specification is mainly described in relation to a 3GPP-based wireless communication system.
  • the technical characteristics of the present specification are not limited thereto.
  • the following detailed description is provided based on a mobile communication system corresponding to the 3GPP-based wireless communication system, but aspects of the present specification that are not limited to the 3GPP-based wireless communication system may be applied to other mobile communication systems.
  • a or B (A or B) may mean “only A”, “only B”, or “both A and B”.
  • a or B (A or B) may be interpreted as “A and/or B (A and/or B)”.
  • A, B or C(A, B or C) herein means “only A”, “only B”, “only C”, or “any and any combination of A, B and C ( any combination of A, B and C)”.
  • a slash (/) or a comma (comma) may mean “and/or”.
  • A/B may mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”.
  • A, B, C may 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 may be construed 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” 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 can mean “at least one of A, B and C”.
  • parentheses used herein may mean “for example”.
  • PDCCH control information
  • PDCCH control information
  • parentheses used herein may mean “for example”.
  • PDCCH control information
  • PDCCH control information
  • FIG. 1 shows an example of a communication system to which an implementation of the present specification is applied.
  • the 5G usage scenario shown in FIG. 1 is only an example, and the technical features of the present specification may 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
  • a communication system 1 includes wireless devices 100a to 100f , a base station (BS) 200 , and a network 300 .
  • BS base station
  • 1 illustrates a 5G network as an example of a network of the communication system 1, the implementation of the present specification is not limited to the 5G system, and may 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 act as base station/network nodes in relation to other wireless devices.
  • the wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (eg, 5G NR or LTE), and may also be referred to as a communication/wireless/5G device.
  • RAT radio access technology
  • the wireless devices 100a to 100f are not limited thereto, and the robot 100a, the vehicles 100b-1 and 100b-2, the extended reality (XR) device 100c, the portable device 100d, and home appliances are not limited thereto.
  • It may include a product 100e, an IoT device 100f, and an artificial intelligence (AI) device/server 400 .
  • a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle communication.
  • Vehicles may include unmanned aerial vehicles (UAVs) (eg drones).
  • XR devices may include AR/VR/mixed reality (MR) devices, and may include head-mounted devices (HMDs) mounted on vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signs, vehicles, robots, and the like. mounted device) or HUD (head-up display).
  • Portable devices may include smartphones, smart pads, wearable devices (eg, smart watches or smart glasses), and computers (eg, laptops).
  • Home appliances may include TVs, refrigerators, and washing machines.
  • IoT devices may include sensors and smart meters.
  • the wireless devices 100a to 100f may be referred to as user equipment (UE).
  • the UE is, for example, a mobile phone, a smartphone, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a slate PC, a tablet PC, an ultrabook, a vehicle, an autonomous driving function.
  • the UAV may be an aircraft that does not have a person on board and is navigated by a radio control signal.
  • the VR device may include a device for realizing an object or a background of a virtual environment.
  • the AR device may include a device implemented by connecting an object or background in a virtual world to an object or background in the real world.
  • the MR apparatus may include a device implemented by merging the background of an object or virtual world with the background of the object or the real world.
  • the hologram device may include a device for realizing a 360-degree stereoscopic image by recording and reproducing stereoscopic information using an interference phenomenon of light generated when two laser lights called a hologram meet.
  • the public safety device may include an image relay device or an image device that can be worn on a 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, alleviating, treating, or preventing a disease.
  • a medical device may be a device used to diagnose, treat, alleviate, or correct an injury or injury.
  • a medical device may be a device used for the purpose of examining, replacing, or modifying structure or function.
  • the medical device may be a device used for pregnancy control purposes.
  • a medical device may include a device for treatment, a device for driving, an (ex vivo) diagnostic device, a hearing aid, or a device for a procedure.
  • a security device may be a device installed to prevent a risk that may occur and to maintain safety.
  • the security device may be a camera, closed circuit television (CCTV), recorder or black box.
  • the fintech device may be a device capable of providing financial services such as mobile payment.
  • a fintech device may include a payment device or a POS system.
  • the weather/environment device may include a device for monitoring or predicting the weather/environment.
  • the 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 5G or later network.
  • the wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but communicate directly without going through the base station 200/network 300 (eg, sidelink communication) You may.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle-to-vehicle (V2V)/vehicle-to-everything (V2X) communication).
  • the IoT device eg, a sensor
  • the IoT device may communicate directly with another IoT device (eg, a sensor) or other wireless devices 100a to 100f.
  • Wireless communications/connections 150a , 150b , 150c may be established between the wireless devices 100a - 100f and/or between the wireless devices 100a - 100f and the base station 200 and/or between the base station 200 .
  • the wireless communication/connection includes uplink/downlink communication 150a, sidelink communication 150b (or device-to-device (D2D) communication), inter-base station communication 150c (eg, relay, integrated access and backhaul), etc.), and may be established through various RATs (eg, 5G NR).
  • the wireless devices 100a to 100f and the base station 200 may transmit/receive wireless signals to/from each other through the wireless communication/connections 150a, 150b, and 150c.
  • the wireless communication/connection 150a , 150b , 150c may transmit/receive signals through various physical channels.
  • various configuration information setting processes for transmission/reception of radio signals various signal processing processes (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), and at least a part of a resource allocation process and the like may be performed.
  • AI refers to a field that studies artificial intelligence or methodologies that can make it
  • machine learning refers to a field that defines various problems dealt with in the field of artificial intelligence and studies methodologies to solve them.
  • Machine learning is also defined as an algorithm that improves the performance of a certain task through constant experience.
  • a robot can mean a machine that automatically handles or operates a task given by its own capabilities.
  • a robot having a function of recognizing an environment and performing an operation by self-judgment may be referred to as an intelligent robot.
  • Robots can be classified into industrial, medical, home, military, etc. depending on the purpose or field of use.
  • the robot may be provided with a driving unit including an actuator or a motor to perform various physical operations such as moving the robot joints.
  • the movable robot includes a wheel, a brake, a propeller, and the like in the driving unit, and may travel on the ground or fly in the air through the driving unit.
  • Autonomous driving refers to a technology that drives itself, and an autonomous driving vehicle refers to a vehicle that runs without or with minimal user manipulation.
  • autonomous driving includes technology that maintains a 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 a route when a destination is set. Technology, etc. may all be included.
  • the vehicle includes a vehicle having only an internal combustion engine, a hybrid vehicle having both an internal combustion engine and an electric motor, and an electric vehicle having only an electric motor, and may include not only automobiles, but also trains, motorcycles, and the like.
  • Autonomous vehicles can be viewed as robots with autonomous driving capabilities.
  • Expanded reality refers to VR, AR, and MR.
  • VR technology provides only CG images of objects or backgrounds in the real world
  • AR technology provides virtual CG images on top of images of real objects
  • MR technology provides CG by mixing and combining virtual objects with the real world.
  • technology MR technology is similar to AR technology in that it shows both real and virtual objects.
  • AR technology a virtual object is used in a form that complements a real object
  • MR technology a virtual object and a real object are used with equal characteristics.
  • NR supports multiple numerology or subcarrier spacing (SCS) to support various 5G services. For example, when SCS is 15 kHz, it supports wide area in traditional cellular band, and when SCS is 30 kHz/60 kHz, dense-urban, lower latency and wider area are supported. It supports a wider carrier bandwidth, and when the SCS is 60 kHz or higher, it supports a bandwidth greater than 24.25 GHz to overcome the phase noise.
  • SCS subcarrier spacing
  • the NR frequency band may be defined as two types of frequency ranges (FR1, FR2).
  • the numerical value of the frequency range is subject to change.
  • 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”
  • mmW millimeter wave
  • FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed band.
  • the unlicensed band can be used for a variety of purposes, for example, for communication for vehicles (eg, autonomous driving).
  • the wireless communication technology implemented in the wireless device of the present specification may include narrowband IoT (NB-IoT, narrowband IoT) for low-power communication as well as LTE, NR, and 6G.
  • NB-IoT narrowband IoT
  • the NB-IoT technology may be an example of a low power wide area network (LPWAN) 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 name.
  • LPWAN low power wide area network
  • the wireless communication technology implemented in the wireless device of the present specification may perform communication based on LTE-M technology.
  • the LTE-M technology may be an example of an LPWAN technology, and may be called by various names such as enhanced MTC (eMTC).
  • eMTC enhanced MTC
  • LTE-M technology is 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) may be implemented in at least one of various standards such as LTE M, and is not limited to the above-described name.
  • the wireless communication technology implemented in the wireless device of the present specification may include at least one of ZigBee, Bluetooth, and/or LPWAN in consideration of low-power communication, and limited to the above-mentioned names it is not
  • the ZigBee technology can create PAN (personal area networks) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.
  • FIG. 2 shows an example of a wireless device to which the implementation of the present specification is applied.
  • the first wireless device 100 and the second wireless device 200 may transmit/receive radio 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 ⁇ radio devices 100a to 100f and base station 200 ⁇ in FIG. 1, ⁇ wireless device 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 a transceiver 106 , at least one processing chip, such as a processing chip 101 , and/or one or more antennas 108 .
  • Processing chip 101 may include at least one processor, such as processor 102 , and at least one memory, such as memory 104 .
  • the memory 104 is exemplarily shown to be included in the processing chip 101 . Additionally and/or alternatively, the memory 104 may be located external to the processing chip 101 .
  • the processor 102 may control the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein. For example, 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 radio 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.
  • the memory 104 may store software code 105 that, when executed by the processor 102 , implements instructions that perform the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • the software code 105 may implement instructions that, when executed by the processor 102 , perform the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • software code 105 may control processor 102 to perform one or more protocols.
  • 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 a RAT (eg, LTE or NR).
  • the transceiver 106 may be coupled to the processor 102 to transmit and/or receive wireless signals via one or more antennas 108 .
  • Each transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may 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 a transceiver 206 , at least one processing chip, such as a processing chip 201 , and/or one or more antennas 208 .
  • the processing chip 201 may include at least one processor, such as a processor 202 , and at least one memory, such as a memory 204 .
  • the memory 204 is exemplarily shown included in the processing chip 201 . Additionally and/or alternatively, the memory 204 may be located external to the processing chip 201 .
  • the processor 202 may control the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein. For example, the processor 202 may process the 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 radio 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.
  • the memory 204 may store software code 205 that, when executed by the processor 202 , implements instructions that perform the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • software code 205 may implement instructions that, when executed by processor 202 , perform the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • software code 205 may control processor 202 to perform one or more protocols.
  • software code 205 may control processor 202 to perform one or more air interface protocol layers.
  • the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a RAT (eg, LTE or NR).
  • the transceiver 206 may be coupled to the processor 202 to transmit and/or receive wireless signals via one or more antennas 208 .
  • Each transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may 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 .
  • the one or more processors 102, 202 may include one or more layers (eg, a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, A functional layer such as a radio resource control (RRC) layer and a service data adaptation protocol (SDAP) layer) may be implemented.
  • layers eg, a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, A functional layer such as a radio resource control (RRC) layer and a 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
  • the 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, proposals, 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, proposals, methods, and/or operational flow diagrams disclosed herein.
  • the one or more processors 102, 202 may configure a signal including a PDU, SDU, message, control information, data or information (eg, a baseband signal) and provide it to one or more transceivers 106 , 206 .
  • the one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , and may be described, functions, procedures, proposals, methods, and/or operational flow diagrams disclosed herein.
  • PDU, SDU, message, control information, data or information may be acquired according to
  • One or more processors 102 , 202 may be referred to as controllers, microcontrollers, microprocessors, and/or microcomputers.
  • 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
  • the descriptions, functions, procedures, proposals, methods, and/or flow diagrams disclosed herein may be implemented using firmware and/or software, and the firmware and/or software may be implemented to include modules, procedures, and functions. .
  • Firmware or software configured to perform the descriptions, functions, procedures, proposals, 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 to provide one It may be driven by the above processors 102 and 202 .
  • the descriptions, functions, procedures, proposals, methods, and/or flow diagrams disclosed herein may be implemented using firmware or software in the form of code, instructions, and/or sets of instructions.
  • One or more memories 104 , 204 may be coupled with one or more processors 102 , 202 , and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions.
  • the one or more memories 104 and 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 may be composed of a combination of One or more memories 104 , 204 may be located inside and/or external to one or more processors 102 , 202 . Additionally, one or more memories 104 , 204 may be coupled to one or more processors 102 , 202 through various technologies, such as wired or wireless connections.
  • the 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 flow charts disclosed herein to one or more other devices. .
  • the one or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed herein, from one or more other devices. there is.
  • one or more transceivers 106 , 206 may be coupled to one or more processors 102 , 202 and may transmit and receive wireless signals.
  • one or more processors 102 , 202 may control one or more transceivers 106 , 206 to transmit user data, control information, wireless signals, etc. to one or more other devices.
  • one or more processors 102 , 202 may control one or more transceivers 106 , 206 to receive user data, control information, wireless signals, etc. from one or more other devices.
  • One or more transceivers 106 , 206 may be coupled to one or more antennas 108 , 208 .
  • One or more transceivers 106, 206 may be connected via one or more antennas 108, 208 to user data, control information, radio signals/channels referred to in the descriptions, functions, procedures, proposals, methods, and/or operational flow diagrams disclosed herein. It may be set to transmit and receive, etc.
  • the 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 are configured to process received user data, control information, radio signals/channels, etc., using one or more processors (102, 202), such as received user data, control information, radio signals/channels, and the like. 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, radio 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 (analog) oscillators and/or filters.
  • one or more transceivers 106, 206 up-convert OFDM baseband signals to OFDM signals via (analog) oscillators and/or filters under the control of one or more processors 102, 202; , an up-converted OFDM signal may be transmitted at a carrier frequency.
  • One or more transceivers 106, 206 receive the OFDM signal at the carrier frequency and down-convert the OFDM signal to an OFDM baseband signal through an (analog) oscillator and/or filter under the control of one or more processors 102, 202. can be down-converted.
  • the UE may operate as a transmitting device in an uplink (UL) and a receiving device in a downlink (DL).
  • the base station may operate as a receiving device in the UL and a transmitting device in the DL.
  • a processor 102 coupled to, mounted on, or shipped with the first wireless device 100 may perform UE operations in accordance with implementations of the present disclosure or may configure the transceiver 106 to perform UE operations in accordance with implementations of the present disclosure.
  • a processor 202 coupled to, mounted on, or shipped to 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 an implementation of the present specification. can be
  • a base station may be referred to as a Node B (Node B), an eNode B (eNB), or a gNB.
  • Node B Node B
  • eNB eNode B
  • gNB gNode B
  • FIG 3 shows an example of a wireless device to which the implementation of the present specification is applied.
  • the wireless device may be implemented in various forms according to usage examples/services (refer to FIG. 1 ).
  • the 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 an additional component 140 .
  • the 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.
  • 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 , 200 .
  • the control device 120 may control the electrical/mechanical operation of each of the wireless devices 100 and 200 based on the program/code/command/information stored in the memory device 130 .
  • the control device 120 transmits information stored in the memory device 130 to the outside (eg, other communication devices) via the communication device 110 through a wireless/wired interface, or a communication device ( 110), information received from an external (eg, other communication device) may be stored in the memory device 130 .
  • the additional component 140 may be variously configured according to the type of the wireless device 100 or 200 .
  • the additional components 140 may include at least one of a power unit/battery, input/output (I/O) devices (eg, audio I/O ports, video I/O ports), drive units, and computing devices.
  • I/O input/output
  • Wireless devices 100 and 200 include, but are not limited to, robots (100a in FIG. 1 ), vehicles ( 100b-1 and 100b-2 in FIG. 1 ), XR devices ( 100c in FIG. 1 ), and portable devices ( FIG. 1 ). 100d), home appliances (100e in FIG. 1), IoT devices (100f in FIG.
  • the wireless devices 100 and 200 may be used in a moving or fixed location according to usage examples/services.
  • all of the various components, devices/parts and/or modules of the wireless devices 100 and 200 may be connected to each other via a wired interface, or at least some of them may be wirelessly connected via 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 (eg, 130 and 140 ) are communication devices. It may be connected wirelessly through 110 .
  • Each component, device/portion, and/or module within the wireless device 100, 200 may further include one or more elements.
  • the control device 120 may be configured by one or more processor sets.
  • control device 120 may be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphic processing device, and a memory control processor.
  • AP application processor
  • ECU electronice control unit
  • the memory device 130 may be configured by RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and/or a combination thereof.
  • FIG. 4 shows an example of a UE to which the implementation of the present specification is applied.
  • the 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 processor 102 , memory 104 , transceiver 106 , one or more antennas 108 , power management module 110 , battery 112 , display 114 , keypad 116 , SIM a (subscriber identification module) card 118 , a speaker 120 , and a microphone 122 .
  • the processor 102 may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • the processor 102 may be configured to control one or more other components of the UE 100 to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flow diagrams disclosed herein.
  • a layer of air interface protocol may be implemented in the processor 102 .
  • the processor 102 may include an ASIC, other chipset, logic circuitry, and/or data processing device.
  • the 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
  • Examples of the processor 102 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 a corresponding next-generation processor. 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 eg, procedures, functions, etc.
  • Modules may be stored in memory 104 and executed by processor 102 .
  • the memory 104 may be implemented within the processor 102 or external to the processor 102 , in which case it may be communicatively coupled with the processor 102 through various methods known in the art.
  • the transceiver 106 is operatively coupled with the processor 102 and transmits and/or receives wireless signals.
  • the transceiver 106 includes a transmitter and a receiver.
  • the 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.
  • the power management module 110 manages power of the processor 102 and/or the transceiver 106 .
  • the battery 112 supplies power to the power management module 110 .
  • the display 114 outputs the result processed by the processor 102 .
  • Keypad 116 receives input for use by processor 102 .
  • the keypad 116 may be displayed on the 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 a subscriber in a mobile phone device such as a mobile phone or computer. 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 .
  • Next-generation mobile communication introduces the concept of network slicing in order to provide various services through one network.
  • the slicing of the network is a combination of network nodes having functions necessary to provide a specific service.
  • a network node constituting a slice instance may be a hardware independent node or a logically independent node.
  • Each slice instance may be composed of a combination of all nodes necessary to configure the entire network. In this case, one slice instance may independently provide a service to the UE.
  • the slice instance may be composed of a combination of some nodes among nodes constituting the network.
  • the slice instance may not provide a service to the UE alone, but may provide a service to the UE in association with other existing network nodes.
  • a plurality of slice instances may provide a service to the UE in association with each other.
  • a slice instance is different from a dedicated core network in that the entire network node including the core network (CN) node and the RAN can be separated. Also, slice instances differ from dedicated core networks in that simply network nodes can be logically separated.
  • CN core network
  • Radio Interface Protocol Radio Interface Protocol
  • the radio interface protocol is based on the 3GPP radio access network standard.
  • the wireless interface protocol consists of a physical layer, a data link layer, and a network layer horizontally, and a user plane for data information transmission and control signals vertically. (Signaling) It is divided into a control plane for transmission.
  • the protocol layers are L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) based on the lower three layers of the Open System Interconnection (OSI) reference model widely known in communication systems. can be divided into
  • the first layer provides an information transfer service using a physical channel.
  • the physical layer is connected to an upper medium access control layer through a transport channel, and data between the medium access control layer and the physical layer is transmitted through the transport channel. And, data is transferred between different physical layers, that is, between the physical layers of the transmitting side and the receiving side through a physical channel.
  • the Medium Access Control (MAC) layer serves to map various logical channels to various transport channels, and is also a logical channel multiplexing layer that maps multiple logical channels to one transport channel. play a role
  • the MAC layer is connected to the RLC layer, which is the upper layer, by a logical channel, and the logical channel is largely divided into a control channel that transmits information in the control plane and a control channel according to the type of transmitted information. It is divided into a traffic channel that transmits user plane information.
  • the radio link control (RLC) layer of the second layer divides and concatenates the data received from the upper layer to adjust the data size so that the lower layer is suitable for data transmission in the radio section perform the role
  • RLC radio link control
  • TM Transparent mode, transparent mode
  • UM Un-acknowledged mode, no response mode
  • AM Acknowledged mode, It provides three operation modes of response mode.
  • the AM RLC performs a retransmission function through an automatic repeat and request (ARQ) function for reliable data transmission.
  • ARQ automatic repeat and request
  • the packet data convergence protocol (PDCP) layer of the second layer is a relatively large IP containing unnecessary control information in order to efficiently transmit IP packets such as IPv4 or IPv6 in a wireless section with a small bandwidth. It performs a header compression function that reduces the packet header size. This serves to increase the transmission efficiency of the radio section by transmitting only necessary information in the header part of the data.
  • the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent data interception by a third party and integrity protection (Integrity protection) to prevent data manipulation by a third party.
  • the Radio Resource Control (RRC) layer located at the uppermost part of the third layer is defined only in the control plane, and sets (setup), reconfiguration (Re) of radio bearers (Radio Bearer; abbreviated as RB). -Responsible for controlling logical channels, transport channels and physical channels in relation to setting) and release.
  • the RB means a service provided by the second layer for data transfer between the UE and the E-UTRAN.
  • the terminal When there is an RRC connection between the RRC of the terminal and the RRC layer of the radio network, the terminal is in the RRC connected state (Connected mode), otherwise it is in the RRC idle state (Idle mode).
  • the RRC state refers to whether or not the RRC of the UE is logically connected to the RRC of the E-UTRAN. If it is connected, it is called an RRC_CONNECTED state, and if it is not connected, it is called an RRC_IDLE state. Since the UE in the RRC_CONNECTED state has an RRC connection, the E-UTRAN can determine the existence of the UE on a cell-by-cell basis, and thus can effectively control the UE.
  • the E-UTRAN cannot detect the UE's existence, and the core network manages it in a tracking area (TA) unit larger than the cell. That is, the UE in the RRC_IDLE state only detects whether the UE exists in a larger regional unit than the cell, and in order to receive a normal mobile communication service such as voice or data, the UE must transition to the RRC_CONNECTED state.
  • TA tracking area
  • Each TA is identified through a tracking area identity (TAI).
  • the UE may configure the TAI through a tracking area code (TAC), which is information broadcast in a cell.
  • TAC tracking area code
  • the terminal searches for an appropriate cell, establishes an RRC connection in the cell, and registers the terminal information in the core network. After this, the UE stays in the RRC_IDLE state. The terminal staying in the RRC_IDLE state selects (re-)selects a cell as needed, and examines system information or paging information. This is called camping on the cell.
  • the UE that stayed in the RRC_IDLE state needs to establish an RRC connection, it establishes an RRC connection with the RRC of the E-UTRAN through an RRC connection procedure and transitions to the RRC_CONNECTED state.
  • RRC_CONNECTED state There are several cases in which the UE in the RRC_IDLE state needs to establish an RRC connection. For example, when uplink data transmission is required for reasons such as a user's call attempt, or when a paging signal is received from the E-UTRAN. and sending a response message to it.
  • the NAS (Non-Access Stratum) layer performs functions such as session management and mobility management.
  • the NAS layer is divided into a NAS entity for MM (Mobility Management) and a NAS entity for SM (Session Management).
  • the NAS entity for MM provides the following general functions.
  • NAS procedures related to AMF including the following.
  • AMF supports the following functions.
  • the NAS entity for SM performs session management between the UE and the SMF.
  • SM signaling messages are processed, ie, generated and processed in the NAS-SM layer of the UE and SMF.
  • the content of the SM signaling message is not interpreted by the AMF.
  • the NAS entity for MM creates a NAS-MM message that derives how and where to forward the SM signaling message with a security header indicating the NAS transmission of the SM signaling, additional information about the receiving NAS-MM.
  • the NAS entity for SM Upon reception of SM signaling, the NAS entity for SM performs an integrity check of the NAS-MM message, and interprets additional information to derive a method and a place to derive the SM signaling message.
  • the RRC layer, the RLC layer, the MAC layer, and the PHY layer located below the NAS layer are collectively referred to as an access layer (Access Stratum: AS).
  • 6 is a diagram for accessing a network slice
  • 5GS coordinates the UE with 5G-AN that can support the network slices that the UE can use.
  • the UE is allocated Allowed NSSAI, which can include S-NSSAI supported in other frequency bands, but all S-NSSAI are supported in all Tracking Areas or Registration Areas.
  • the UE is in idle mode and will be registered via RAN-1 for S-NSSAI-1 operating only in frequency band 1 (FB-1) and S-NSSAI-2 operating only in frequency band 2 (FB-1). can
  • the application of the UE must configure the service for the S-NSSAI-2 of the FB-2.
  • the UE may establish an RRC connection with RAN-1.
  • the UE may trigger a PDU session establishment request for S-NSSAI-2 through RAN-1.
  • AMF knows that RAN-1 to which the UE is connected does not support S-NSSAI-2, and AMF knows that S-NSSAI-2 is supported by other RAN Nodes.
  • AMF may request RAN-1 to steer the UE to a RAN node supporting S-NSSAI-2.
  • RAN-1 supports S-NSSAI-2 and can trigger inter-frequency cell change to RAN-2 at the UE's location.
  • Defining cell change between frequencies in connected mode is for the RAN workgroup. There is a cell change such as handover, cell change command, direction change or RRC release with RRC connection reconfiguration.
  • AMF may continue the PDU session establishment procedure for S-NSSAI-2 through RAN-2.
  • the UE may fall back (eg, reselect) to the cell of FB-1. This step is optional. If this step is not implemented, the UE may stay in FB-2 until it is re-coordinated to FB-1 due to a new service request to FB-2.
  • the UE may (optionally) cell fall back to the cell in the initial frequency band.
  • the AMF may make a handover decision and may request a handover to a cell in a different frequency band.
  • step 7 above it is a problem that RAN-1 supports S-NSSAI-2 and correctly selects RAN-2 at the location of the UE. If RAN-2 (target cell) selected by RAN-1 does not support S-NSSAI and its frequency band, there is an inconvenience of selecting a target cell again and performing a handover procedure, A solution is needed for this.
  • the S-NSSAI allocated to each PDN connection in the EPS to 5GS handover situation using the N26 interface supports a frequency band that can be used within 5GS NR target cell ( A method for selecting a target NR cell) may be provided.
  • a new service operation may be defined and used.
  • a new N2 message may be defined and used.
  • a new RRC message may be defined and used in some of the RRC messages between the NG-RAN and the UE described below.
  • network slice and S-NSSAI may be used interchangeably.
  • a 5G cell supporting a frequency band represents a method of excluding a target cell for inter-system handover.
  • the terminal is already registered in the EPC network and has one or more PDN connections.
  • the S-NSSAI value for each PDN connection is also received.
  • the E-UTRAN may transmit configuration information for measurement to the UE by using RRC Connection Reconfiguration or another RRC message (1a). After updating the settings according to MeasConfig, the UE may respond to the E-UTRAN through RRC Connection Reconfiguration Complete or another RRC message (1b).
  • the UE may perform measurement according to the configuration for measurement received from the E-UTRAN in step 1. In this case, measurement for inter-system handover may also be performed.
  • the inter-system handover refers to handover from EPS to 5GS or handover from 5GS to EPS.
  • the UE may transmit the measurement result in step 2 to the E-UTRAN through a measurement report message.
  • the measurement report message may include information about a frequency band that the S-NSSAI allocated to each PDN connection can use within 5GS and preference for a 5G cell supporting it. That is, the measurement report message is a frequency band that the S-NSSAI assigned to each PDN connection among the results measured for inter-system handover cannot be used within 5GS and 5G cells supporting it are not preferred. It may include an indication that it does not.
  • the UE may not transmit an indication of preference for specific 5G frequency band(s) (“Indication on preference for specific 5G frequency band(s)”). Instead, the S-NSSAI assigned to each PDN connection does not report i) measurement results for frequency bands that cannot be used within 5GS and 5G cells that support it, or ii) the UE arbitrarily sets a very low value. or iii) that cells belonging to the corresponding frequency band are barring may be transmitted to the E-UTRAN.
  • the E-UTRAN may determine a target cell from among cells supporting the frequency band indicated by the UE preferred.
  • a 5G cell supporting a frequency band that the S-NSSAI assigned to each PDN connection of E-UTRAN cannot use within 5GS may be excluded from the target cell target for inter-system handover and the target cell may be selected. .
  • EPS to 5GS handover using N26 interface may be performed according to section 4.11.1.2.2 of TS 23.502 (3GPP TS 23.502 V16.5.1 (2020-08)).
  • FIG 8 illustrates a method in which the UE notifies the E-UTRAN of a preference for a specific 5G frequency band in advance to receive only a measurement configuration for a specific 5G frequency band.
  • the terminal is already registered in the EPC network and has one or more PDN connections.
  • the S-NSSAI value for each PDN connection is also received.
  • the UE may transmit an RRC message including information indicating preference for a specific 5G frequency band to the E-UTRAN.
  • the information that a specific 5G frequency band is preferred may include information on a frequency band usable within 5GS for S-NSSAI allocated to each PDN connection.
  • the E-UTRAN may transmit configuration information for measurement to the UE using RRC Connection Reconfiguration or another RRC message.
  • it may be configured to measure only the 5G frequency band preferred by the UE based on the information received from the UE in step 1 ( 2a).
  • the UE may update the measurement configuration based on the measurement configuration information (MeasConfig) received from the E-UTRAN. Thereafter, it may respond to the E-UTRAN through RRC Connection Reconfiguration Complete or another RRC message (2b).
  • MeasConfig measurement configuration information
  • the UE may perform measurement according to the updated measurement configuration in step 2. In this case, the UE may also perform measurement for inter-system handover.
  • the UE may report the measurement result in step 3 to the E-UTRAN through a measurement report message.
  • the measurement report message may include a measurement result for inter-system handover. That is, the measurement report message may include information about a frequency band that can be used within 5GS for S-NSSAI allocated to each PDN connection and a result for a 5G cell supporting it.
  • E-UTRAN receiving the measurement result from the UE is a target for inter-system handover among 5G cells supporting a frequency band that can be used within 5GS for S-NSSAI allocated to each PDN connection A target cell may be determined.
  • EPS to 5GS handover using N26 interface can be performed according to section 4.11.1.2.2 of TS 23.502.
  • FIG. 9 shows a method for the target NG-RAN to notify the source E-UTRAN of a list of candidate target cell ID(s) in the EPS to 5GS handover process, and to select a new target cell based on this.
  • the terminal is already registered in the EPC network and has one or more PDN connections.
  • the S-NSSAI value for each PDN connection is also received.
  • the target NG-RAN performs a handover ) can be determined to fail.
  • the target NG-RAN may transmit a handover failure message to the source E-UTRAN.
  • the target NG-RAN may transmit a handover failure message to the target NG-RAN AMF.
  • the target NG-RAN may transmit a cause value indicating the reason of handover failure and a target to source failure transparent container together.
  • Target NG-RAN determines a list of candidate target cell ID(s) that can support the frequency band used within 5GS by the S-NSSAI(s) of the terminal among the surrounding 5G cells, and includes it in the Target to source failure transparent container can do it
  • Target AMF may include information such as cause value and target to source failure transparent container received in step 2 in the Forward Relocation Response message and transmit it to the MME.
  • the MME may transmit the information received in step 3 to the source E-UTRAN by including it in the Handover Preparation Failure message.
  • the Source E-UTRAN may determine a new target cell by referring to the list of candidate target cell ID(s) received in step 4 and the measurement result previously received from the UE.
  • EPS to 5GS handover using N26 interface may be performed toward the new target cell determined in step 5.
  • 10A and 10B show a fourth disclosure of the present specification.
  • 10A and 10B show a method in which the target NG-RAN unconditionally accepts the inter-system handover of the UE, then successively executes the handover in the 5G system to transfer the handover to a new target cell.
  • the terminal is already registered in the EPC network and has one or more PDN connections.
  • the S-NSSAI value for each PDN connection is also received.
  • the NG-RAN of the target cell is It may decide to proceed with the handover. And NG-RAN may transmit a Handover Request Acknowledge message to the target AMF.
  • the NG-RAN may include a “Retrigger of HO in 5GC” indication and Early measurement configuration information in the HandoverCommand message to be delivered to the UE through the target AMF.
  • the NG-RAN cannot properly provide the network slice service because the frequency band is different in the current target cell to the UE, so the NG-RAN hand once again to another cell around the target cell. You can signal that it will be over. Therefore, the terminal receiving the "Retrigger of HO in 5GC” indication does not immediately transmit uplink data even if it moves to the target cell, but may wait for a handover to follow.
  • the NG-RAN may transfer early measurement related configuration information to the UE in advance. Through the early measurement configuration information, the NG-RAN may determine a new target cell to perform inter NG-RAN handover once again as soon as the UE moves over to the target NG-RAN.
  • the "Retrigger of HO in 5GC" indication may be explicitly provided or may be provided implicitly.
  • the Target NG-RAN provides context information for the PDU session to the HandoverCommand (this is the PDU session-related DRB information) Even in this case, in step 12 to be described later, handover is performed including the context for this PDU session.
  • the Target AMF may transmit the HandoverCommand message received in step 2 to the MME by including it in the Forward Relocation Response message.
  • the HandoverCommand message may include information such as “Retrigger of HO in 5GC” indication and Early measurement configuration.
  • Step 15 of Figure 4.11.1.2.2.2-1 of Section 4.11.1.2.2.2 of TS 23.502 can be executed for EPS to 5GS handover using N26 interface.
  • the MME may transmit the information received in step 4 to the E-UTRAN by including it in the NGAP Handover Command message.
  • the E-UTRAN may deliver the HandoverCommand message sent by the target NG-RAN in step 2 to the UE.
  • the UE Through the “Retrigger of HO in 5GC” indication, the UE knows that it will be handed over to another cell around the target cell, and therefore, even if it moves to the target cell, it does not immediately transmit uplink data, but the hand to follow Can wait for over.
  • the UE updates the measurement-related configuration settings according to the instruction of the target NG-RAN so that the UE can perform inter NG-RAN handover once again as soon as it moves to the target NG-RAN, and then performs measurement. (measurement) can be carried out in advance.
  • the terminal may access the target NG-RAN.
  • the UE may transmit the measurement result to the NG-RAN according to the Early measurement configuration received in step 7.
  • the UE may transmit the measurement result to the NG-RAN through the RRC message of step 8.
  • the NG-RAN may determine a new target NR cell. And the NG-RAN prepares to perform continuous handover.
  • Xn-based or NG-based handover may be performed toward the new target cell determined in step 11.
  • FIG 11 shows the procedure of the first network for the second disclosure of the present specification.
  • the first network may receive information about a frequency band that the UE wants to use from the UE.
  • the frequency band information may be for 5G.
  • the first network may send measurement configuration information to the UE.
  • the measurement setting information may include only measurement setting information for a frequency band indicated by the frequency band information.
  • the measurement configuration information may be included in the RRC message and transmitted to the UE.
  • the first network may receive the measurement result from the UE.
  • the measurement result may include only the measurement result for the frequency band indicated by the frequency band information.
  • the first network may determine a second network for handover of the UE based on the measurement configuration information.
  • the first network may perform handover of the UE to the second network.
  • the handover may be a handover from EPS to 5GS.
  • the UE may transmit information about the frequency band it wants to use to the first network.
  • the frequency band information may be for a frequency band in which the UE provides a network slice corresponding to a PDN connection being provided with a service in an Evolved Packet Core (EPC) in the 5G system.
  • EPC Evolved Packet Core
  • the UE may receive measurement configuration information from the first network.
  • the measurement configuration information may include only measurement configuration information for a frequency band indicated by the frequency band information.
  • the measurement configuration information may be included in the RRC message and received from the first network.
  • the UE may perform measurement only for the frequency band indicated by the frequency band information.
  • the UE may transmit the measurement result to the first network.
  • the UE may perform handover to the second network determined by the first network.
  • the handover may be a handover from EPS to 5GS.
  • the terminal may include a processor, a transceiver, and a memory.
  • a processor may be configured to be operatively coupled with a memory and processor.
  • the terminal transmits information on a frequency band desired by the UE to the first network through the transceiver.
  • the terminal receives measurement configuration information from the first network through the transceiver.
  • the measurement setting information includes only measurement setting information for a frequency band indicated by the frequency band information.
  • the terminal measures only the frequency band indicated by the frequency band information through the processor.
  • the terminal transmits the measurement result to the first network through the transceiver.
  • the terminal performs handover to the second network determined by the first network through the processor.
  • the processor transmitting, by the processor, information on a frequency band desired by the UE to a first network; receiving measurement configuration information from the first network, wherein the measurement configuration information includes only measurement configuration information for a frequency band indicated by the frequency band information; performing measurement only for a frequency band indicated by the frequency band information; transmitting a result of the measurement to the first network;
  • the step of performing handover to the second network determined by the first network may be performed.
  • the technical features of the present disclosure may be directly implemented as 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, a hard disk, a removable disk, a CD-ROM, or other storage medium.
  • a storage medium are coupled to the processor such that the processor can read information from the storage medium.
  • the storage medium may be integrated into the processor.
  • the processor and storage medium may reside in the ASIC.
  • a processor and a 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), or 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 other media 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 computer readable communication media that carry or carry code in the form of instructions or data structures and which can be accessed, read, and/or executed by a computer.
  • a non-transitory computer-readable medium has one or more instructions stored thereon.
  • the stored one or more instructions may be executed by a processor of the base station.
  • the stored one or more instructions may include: causing the processors to transmit information about a frequency band desired by the UE to a first network; receiving measurement configuration information from the first network, wherein the measurement configuration information includes only measurement configuration information for a frequency band indicated by the frequency band information; performing measurement only for a frequency band indicated by the frequency band information; transmitting a result of the measurement to the first network; The step of performing handover to the second network determined by the first network may be performed.
  • the present specification may have various effects.

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  • Mobile Radio Communication Systems (AREA)

Abstract

Une divulgation de la présente invention concerne un procédé grâce auquel un premier réseau effectue une communication. Le procédé comprend les étapes consistant à : recevoir d'un équipement utilisateur (UE) des informations sur une bande de fréquences destinées à être utilisées par l'UE ; transmettre des informations de configuration de mesure à l'UE, les informations de configuration de mesure contenant des informations de configuration de mesure ne portant que sur une bande de fréquences indiquée par les informations sur la bande de fréquences ; recevoir un résultat de mesure provenant de l'UE, le résultat de mesure contenant un résultat de mesure ne portant que sur une bande de fréquences indiquée par les informations sur la bande de fréquences ; déterminer un second réseau en vue d'un transfert intercellulaire de l'UE sur la base des informations de configuration de mesure ; et effectuer un transfert intercellulaire de l'UE dans le second réseau.
PCT/KR2021/010679 2020-08-13 2021-08-11 Procédé de gestion de session WO2022035231A1 (fr)

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KR10-2020-0101706 2020-08-13
KR20200101706 2020-08-13

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Citations (3)

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KR20140006064A (ko) * 2011-04-13 2014-01-15 노키아 지멘스 네트웍스 오와이 Ｍｂｍｓ 기능에 따른 셀 선택
KR20180080989A (ko) * 2017-01-05 2018-07-13 아서스테크 컴퓨터 인코포레이션 무선 통신 시스템에서 뉴머롤로지를 결정하는 방법 및 장치
WO2020030676A1 (fr) * 2018-08-09 2020-02-13 Telefonaktiebolaget Lm Ericsson (Publ) Transfert inter-système des systèmes à connectivité simple/double vers des systèmes à connectivité double

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KR20140006064A (ko) * 2011-04-13 2014-01-15 노키아 지멘스 네트웍스 오와이 Ｍｂｍｓ 기능에 따른 셀 선택
KR20180080989A (ko) * 2017-01-05 2018-07-13 아서스테크 컴퓨터 인코포레이션 무선 통신 시스템에서 뉴머롤로지를 결정하는 방법 및 장치
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