WO2023191532A1 - Procédé et dispositif pour faire fonctionner un terminal dans un système de communication sans fil - Google Patents

Procédé et dispositif pour faire fonctionner un terminal dans un système de communication sans fil Download PDF

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Publication number
WO2023191532A1
WO2023191532A1 PCT/KR2023/004254 KR2023004254W WO2023191532A1 WO 2023191532 A1 WO2023191532 A1 WO 2023191532A1 KR 2023004254 W KR2023004254 W KR 2023004254W WO 2023191532 A1 WO2023191532 A1 WO 2023191532A1
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WO
WIPO (PCT)
Prior art keywords
terminal
plmn
location information
terminal location
network
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PCT/KR2023/004254
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English (en)
Korean (ko)
Inventor
김선희
Original Assignee
엘지전자 주식회사
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Publication of WO2023191532A1 publication Critical patent/WO2023191532A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/04—Access restriction performed under specific conditions based on user or terminal location or mobility data, e.g. moving direction, speed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the following description is about a wireless communication system and a terminal operation method. Specifically, it is about how the terminal operates by determining incorrect configuration information (NW wrong configuration) from the network.
  • Wireless access systems are being widely deployed to provide various types of communication services such as voice and data.
  • a wireless access system is a multiple access system that can support communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • 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, and single carrier frequency (SC-FDMA) systems. division multiple access) systems, etc.
  • enhanced mobile broadband (eMBB) communication technology is being proposed compared to the existing radio access technology (RAT).
  • RAT radio access technology
  • a communication system that takes into account reliability and latency-sensitive services/UE (user equipment) as well as mMTC (massive machine type communications), which connects multiple devices and objects to provide a variety of services anytime and anywhere, is being proposed. .
  • mMTC massive machine type communications
  • the present disclosure relates to a method and device for receiving location information of a terminal from a network along with a specific reason code for network connection failure in a wireless communication system.
  • the present disclosure relates to a method and apparatus for determining whether a terminal receives incorrect configuration information from a network in a wireless communication system.
  • the present disclosure provides a method and apparatus for determining whether the location information received by the terminal matches the location information of the terminal when the terminal receives the location information of the terminal along with a specific reason code for network connection failure in a wireless communication system. It's about.
  • the present disclosure provides that in a wireless communication system, when the location information received by the terminal does not match the location information of the terminal, the terminal transmits the corresponding PLMN (Public Land Mobile Network) information to a PLMN (PLMNs not allowed to) in the current location of the terminal.
  • PLMN Public Land Mobile Network
  • the present disclosure provides that when the location information received by the terminal matches the location information of the terminal in a wireless communication system, the terminal uses the corresponding PLMN information as a PLMN (PLMNs not allowed to operate at the present UE location).
  • PLMNs PLMNs not allowed to operate at the present UE location.
  • a method and device for storing a list can be provided.
  • the terminal performs a connection to a network, the first PLMN ( When connection to a public land mobile network (public land mobile network) is not possible, receiving a cause value indicating inability to connect to the first PLMN at the terminal location, a first PLMN ID, and first terminal location information, the first terminal location Comparing the information and the second terminal location information, and based on whether the first terminal location information and the second terminal location information match, the first PLMN ID is set to a PLMN that is not allowed to access the terminal location (PLMNs not allowed to operate at It may include a step of determining whether to include the present UE location in the list.
  • a terminal operating in a wireless communication system at least one transceiver, at least one processor, and operably connected to at least one processor, when executed, at least one processor performs a specific operation. It includes at least one memory that stores instructions to be performed, and the specific operation is: performing a connection to a network, and the terminal attempts to connect based on the UE location.
  • PLMN public land mobile network
  • at least one device is configured to receive a cause value indicating inability to connect to the first PLMN at the terminal location, a first PLMN ID, and first terminal location information.
  • Control the transceiver compare the first terminal location information and the second terminal location information, and determine whether the first PLMN ID is allowed to access the terminal location based on whether the first terminal location information and the second terminal location information match. You can decide whether to include it in the PLMN (PLMNs not allowed to operate at the present UE location) list.
  • the step of receiving a connection request message from a terminal, and the terminal based on the UE location If connection is not possible to the first PLMN (public land mobile network) that attempted to connect, a cause value indicating the inability to connect to the first PLMN at the terminal location, the first PLMN ID, and the first terminal location information are provided.
  • PLMN public land mobile network
  • At least one transceiver in an AMF operating in a wireless communication system, at least one transceiver, at least one processor, and operably connected to at least one processor, when executed, at least one processor performs a specific operation. It includes at least one memory storing instructions to be performed, and specific operations include: controlling at least one transceiver to receive a connection request message from a terminal, and based on the UE location. If the terminal cannot connect to the first PLMN (public land mobile network) to which it attempted to connect, a cause value indicating the inability to connect to the first PLMN at the terminal location, the first PLMN ID, and the first terminal location.
  • first PLMN public land mobile network
  • the transceiver is controlled to transmit information, but the terminal sets the first PLMN ID to a PLMN (PLMNs not allowed to operate at the terminal location) based on whether the first terminal location information matches the second terminal location information. present UE location) You can decide whether to include it in the list.
  • PLMNs PLMNs not allowed to operate at the terminal location
  • the at least one processor is connected to a network.
  • Control to receive a cause value, a first PLMN ID, and first terminal location information control to compare the first terminal location information and the second terminal location information, and control the first terminal location information and the second terminal. Based on whether the location information matches, it can be controlled to determine whether to include the first PLMN ID in the PLMN (PLMNs not allowed to operate at the present UE location) list that is not allowed to access at the UE location.
  • At least one executable by a processor includes a command, wherein at least one command controls the device to perform a connection to a network, and the first public land mobile network (PLMN) to which the device attempted to connect based on the device location (UE location). ), if connection is not possible, control to receive a cause value indicating inability to connect to the first PLMN at the device location, the first PLMN ID, and the first terminal location information, and the first terminal location information and the first terminal location information are controlled to be received.
  • PLMN public land mobile network
  • Controls to compare terminal location information, and sets the first PLMN ID to a PLMN that is not allowed to access at the terminal location based on whether the first terminal location information matches the second terminal location information (PLMNs not allowed to operate at the present UE location) can be controlled to determine whether to include it in the list.
  • the first terminal location information may be terminal location information that the terminal receives from the network
  • the second terminal location information may be terminal location information measured by the terminal.
  • the first terminal location information may include at least one of a terminal location information content length, a terminal location information type, and a terminal location information information element.
  • the network when the first terminal location information is the first type of location information, the network receives user location information (ULI) from a radio access network (RAN) to determine the terminal location, and the terminal 1 CGI (cell global identity) information can be received from the network as terminal location information.
  • UMI user location information
  • RAN radio access network
  • CGI cell global identity
  • the CGI information includes a first PLMN ID, a location are code (LAC), and a cell identification (CI), and the terminal determines whether the first PLMN ID matches the second PLMN ID.
  • the second PLMN may be a registered PLMN of the terminal or a selected PLMN.
  • the network receives the first terminal location information from a location management function (LMF) to determine the terminal location, and the terminal receives the first terminal location information.
  • LMF location management function
  • a first GNSS global navigation satellite system
  • GAD geographical area description
  • the terminal determines whether the first terminal location information and the second terminal location information match based on whether the first GNSS and the second GNSS match, and the second GNSS is the GNSS of the terminal. You can.
  • the terminal determines the first terminal location information and the second terminal location information based on whether the first country information corresponding to the first GNSS and the second country information corresponding to the second GNSS match. Determine whether there is a match, but the second GNSS may be the GNSS of the terminal.
  • the terminal when the first terminal location information and the second terminal location information match, the terminal sets the first PLMN ID to a PLMN that is not allowed to access at the terminal location (PLMNs not allowed to operate at the present). UE location) list, and when the terminal switches to idle mode and performs PLMN selection, the terminal may exclude the first PLMN from the candidate PLMN based on the PLMN list to which access is not permitted at the terminal location. .
  • the terminal when the first terminal location information and the second terminal location information do not match, the terminal sets the first PLMN ID to a PLMN (PLMNs not allowed to operate at the terminal location).
  • PLMNs PLMNs not allowed to operate at the terminal location.
  • present UE location PLMNs not allowed to operate at the terminal location
  • the UE can perform PLMN selection by including the first PLMN in the candidate PLMN.
  • the cause value, the first PLMN ID, and the first terminal location information are included in at least one of a registration rejection message and a service rejection message received from an access and management function (AMF). and can be transmitted to the terminal.
  • AMF access and management function
  • the terminal further receives a timer value and distance value information along with a reason value, a first PLMN ID, and first terminal location information, where the timer value is time information for which the reason value is valid, and the distance value may be distance information where the terminal location is valid.
  • the network may be a satellite network.
  • the present disclosure can provide a method in which a terminal receives location information of a terminal from a network along with a specific reason code for network connection failure in a wireless communication system.
  • the present disclosure may provide a method for determining whether a terminal receives incorrect configuration information from a network in a wireless communication system.
  • the present disclosure provides a method of determining whether the location information received by the terminal matches the location information of the terminal when the terminal receives the location information of the terminal along with a specific reason code for network connection failure in a wireless communication system. can do.
  • the present disclosure provides that in a wireless communication system, when the location information received by the terminal does not match the location information of the terminal, the terminal uses the corresponding PLMN information as a PLMN (PLMNs not allowed to operate at the present UE location). ) You can provide a way not to save it to the list.
  • the present disclosure provides that when the location information received by the terminal matches the location information of the terminal in a wireless communication system, the terminal uses the corresponding PLMN information as a PLMN (PLMNs not allowed to operate at the present UE location). A method of saving to a list can be provided.
  • FIG. 1 is a diagram showing an example of a communication system applicable to the present disclosure.
  • Figure 2 shows an example of a UE to which the implementation of the present specification is applied.
  • Figure 3 is a diagram showing an example of functional separation of a general NG-RAN and 5GC (5th generation core).
  • Figure 4 is a diagram showing an example of a general architecture of a 5G (5th generation) system.
  • FIG. 5 is a diagram illustrating a method in which a cell includes a plurality of tracking areas (TA) based on a mobile cell applicable to the present disclosure.
  • TA tracking areas
  • Figure 6 is a diagram showing a method of broadcasting TA based on satellite movement that can be applied to the present disclosure.
  • FIG. 7 is a flowchart showing terminal operations applicable to the present disclosure.
  • FIG. 8 is a flowchart showing terminal operations applicable to the present disclosure.
  • FIG. 9 is a flowchart showing an AMF operation applicable to the present disclosure.
  • each component or feature may be considered optional unless explicitly stated otherwise.
  • Each component or feature may be implemented in a form that is not combined with other components or features. Additionally, some components and/or features may be combined to configure an embodiment of the present disclosure. The order of operations described in embodiments of the present disclosure may be changed. Some features or features of one embodiment may be included in another embodiment or may be replaced with corresponding features or features of another embodiment.
  • the base station is meant as a terminal node of the network that directly communicates with the mobile station. Certain operations described in this document as being performed by the base station may, in some cases, be performed by an upper node of the base station.
  • 'base station' is a term such as fixed station, Node B, eNB (eNode B), gNB (gNode B), ng-eNB, advanced base station (ABS), or access point. It can be replaced by .
  • a terminal may include a user equipment (UE), a mobile station (MS), a subscriber station (SS), a mobile subscriber station (MSS), It can be replaced with terms such as mobile terminal or advanced mobile station (AMS).
  • UE user equipment
  • MS mobile station
  • SS subscriber station
  • MSS mobile subscriber station
  • AMS advanced mobile station
  • the transmitting end refers to a fixed and/or mobile node that provides a data service or a voice service
  • the receiving end refers to a fixed and/or mobile node that receives a data service or a voice service. Therefore, in the case of uplink, the mobile station can be the transmitting end and the base station can be the receiving end. Likewise, in the case of downlink, the mobile station can be the receiving end and the base station can be the transmitting end.
  • Embodiments of the present disclosure include wireless access systems such as the IEEE 802.xx system, 3GPP (3rd Generation Partnership Project) system, 3GPP LTE (Long Term Evolution) system, 3GPP 5G ( 5th generation) NR (New Radio) system, and 3GPP2 system. It may be supported by standard documents disclosed in at least one of the following, and in particular, embodiments of the present disclosure are supported by 3GPP TS (technical specification) 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.321, and 3GPP TS 38.331 documents. It can be supported.
  • 3GPP TS technical specification
  • embodiments of the present disclosure can be applied to other wireless access systems and are not limited to the above-described systems. As an example, it may be applicable to systems applied after the 3GPP 5G NR system and is not limited to a specific system.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • LTE may refer to technology after 3GPP TS 36.xxx Release 8.
  • LTE technology after 3GPP TS 36.xxx Release 10 may be referred to as LTE-A
  • LTE technology after 3GPP TS 36.xxx Release 13 may be referred to as LTE-A pro.
  • 3GPP NR may refer to technology after TS 38.xxx Release 15.
  • 3GPP 6G may refer to technologies after TS Release 17 and/or Release 18. “xxx” refers to the standard document detail number.
  • LTE/NR/6G can be collectively referred to as a 3GPP system.
  • abbreviations, and other background technology that may be used in this document, please refer to the following standard document description published prior to this document.
  • terms, abbreviations, and other background technologies related to LTE/EPS can refer to the 36.xxx series, 23.xxx series, and 24.xxx series, and terms and abbreviations related to NR (new radio)/5GS.
  • other background technologies can refer to the 38.xxx series, 23.xxx series, and 24.xxx series.
  • the three key requirements areas for 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Ultra-Reliable and Includes the area of ultra-reliable and low latency communications (URLLC).
  • eMBB Enhanced Mobile Broadband
  • mMTC Massive Machine Type Communication
  • URLLC ultra-Reliable and Includes the area of ultra-reliable and low latency communications
  • KPI Key Performance Indicator
  • FIG. 1 is a diagram illustrating an example of a communication system applied to the present disclosure.
  • the communication system 100 applied to the present disclosure includes a wireless device, a base station, and a network.
  • a wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR, LTE) and may be referred to as a communication/wireless/5G device.
  • wireless devices include robots (100a), vehicles (100b-1, 100b-2), extended reality (XR) devices (100c), hand-held devices (100d), and home appliances (100d).
  • appliance) (100e), IoT (Internet of Thing) device (100f), and AI (artificial intelligence) device/server (100g).
  • vehicles may include vehicles equipped with wireless communication functions, autonomous vehicles, vehicles capable of inter-vehicle communication, etc.
  • the vehicles 100b-1 and 100b-2 may include an unmanned aerial vehicle (UAV) (eg, a drone).
  • UAV unmanned aerial vehicle
  • the XR device 100c includes augmented reality (AR)/virtual reality (VR)/mixed reality (MR) devices, including a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, It can be implemented in the form of smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc.
  • the mobile device 100d may include a smartphone, smart pad, wearable device (eg, smart watch, smart glasses), computer (eg, laptop, etc.), etc.
  • Home appliances 100e may include a TV, refrigerator, washing machine, etc.
  • IoT device 100f may include sensors, smart meters, etc.
  • the base station 120 and the network 130 may also be implemented as wireless devices, and a specific wireless device 120a may operate as a base station/network node for other wireless devices.
  • Wireless devices 100a to 100f may be connected to the network 130 through the base station 120.
  • 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 100g through the network 130.
  • the network 130 may be configured using a 3G network, 4G (eg, LTE) network, or 5G (eg, NR) network.
  • Wireless devices 100a to 100f may communicate with each other through the base station 120/network 130, but communicate directly (e.g., sidelink communication) without going through the base station 120/network 130. You may.
  • vehicles 100b-1 and 100b-2 may communicate directly (eg, vehicle to vehicle (V2V)/vehicle to everything (V2X) communication).
  • the IoT device 100f eg, sensor
  • the IoT device 100f may communicate directly with other IoT devices (eg, sensor) or other wireless devices 100a to 100f.
  • Wireless communication/connection may be established between the wireless devices (100a to 100f)/base station (120) and the base station (120)/base station (120).
  • wireless communication/connection includes various methods such as uplink/downlink communication (150a), sidelink communication (150b) (or D2D communication), and inter-base station communication (150c) (e.g., relay, integrated access backhaul (IAB)).
  • IAB integrated access backhaul
  • This can be achieved through wireless access technology (e.g. 5G NR).
  • wireless communication/connection 150a, 150b, 150c
  • a wireless device and a base station/wireless device, and a base station and a base station can transmit/receive wireless signals to each other.
  • 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.) , at least some of the resource allocation process, etc. may be performed.
  • Figure 2 may show an example of a UE to which the implementation of the present specification is applied.
  • the UE 200 includes a processor 202, a memory 204, a transceiver 206, one or more antennas 208, a power management module 241, a battery 242, a display 243, It may include a keypad 244, a Subscriber Identification Module (SIM) card 245, a speaker 246, and a microphone 247.
  • SIM Subscriber Identification Module
  • Processor 202 may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein. Processor 202 may be configured to control one or more other components of UE 200 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 202. Processor 202 may include an ASIC, other chipset, logic circuitry, and/or data processing devices. Processor 202 may be an application processor. The processor 202 may include at least one of a DSP, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), and a modem (modulator and demodulator).
  • CPU Central Processing Unit
  • GPU Graphics Processing Unit
  • modem modulator and demodulator
  • the memory 204 is operatively coupled to the processor 202 and can store various information for operating the processor 202.
  • Memory 204 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 204 and executed by processor 202.
  • Memory 204 may be implemented within processor 202 or external to processor 202, in which case it may be communicatively coupled to processor 202 through various methods known in the art.
  • Transceiver 206 is operatively coupled to processor 202 and can transmit and/or receive wireless signals.
  • Transceiver 206 may include a transmitter and a receiver.
  • Transceiver 206 may include baseband circuitry for processing radio frequency signals.
  • the transceiver 206 may control one or more antennas 208 to transmit and/or receive wireless signals.
  • the power management module 241 may manage power of the processor 202 and/or the transceiver 206.
  • the battery 242 may supply power to the power management module 241.
  • the display 243 may output results processed by the processor 202.
  • Keypad 244 may receive input for use by processor 202. Keypad 244 may be displayed on display 243.
  • SIM card 245 is an integrated circuit for securely storing an International Mobile Subscriber Identity (IMSI) and associated keys, and can be used to identify and authenticate subscribers in mobile phone devices such as cell phones or computers. You can also store contact information on many SIM cards.
  • IMSI International Mobile Subscriber Identity
  • the speaker 246 may output sound-related results processed by the processor 202.
  • Microphone 247 may receive sound-related input for use by processor 202.
  • the UE may operate as a transmitting device in the uplink and as a receiving device in the downlink.
  • the base station may operate as a receiving device in the UL and as a transmitting device in the DL.
  • the base station may be referred to as Node B (Node B), eNode B (eNB), or gNB, and may not be limited to a specific form.
  • each UE may include a communication device, a control device, a memory device, and additional components.
  • a communication device may include communication circuitry and a transceiver.
  • communications circuitry may include one or more processors and/or one or more memory.
  • a transceiver may include one or more transceivers and/or one or more antennas.
  • the control unit is electrically connected to the communication unit, memory unit and additional components and can control the overall operation of each UE.
  • control device may control the electrical/mechanical operation of each UE based on programs/codes/commands/information stored in the memory device.
  • the control device transmits information stored in the memory device to the outside (e.g., other communication devices) via a communication device through a wireless/wired interface, or to the outside (e.g., other communication devices) via a communication device through a wireless/wired interface.
  • Information received from can be stored in a memory device.
  • the additional component 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 UE is not limited to this, but includes robots (100a in FIG. 1), vehicles (100b-1 and 100b-2 in FIG. 1), XR devices (100c in FIG. 1), portable devices (100d in FIG. 1), and home appliances.
  • Products (100e in Figure 1), IoT devices (100f in Figure 1), digital broadcasting terminals, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, and climate/environment devices.
  • It can be implemented in the form of an AI server/device (100g in FIG. 1), a base station (120 in FIG. 1), and a network node.
  • the UE can be used in a mobile or fixed location depending on the usage/service.
  • a control device may be comprised of a set of one or more processors.
  • the control device may be composed of 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.
  • the memory device may be comprised of RAM, Dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and/or a combination thereof.
  • the 5G system is an advanced technology from the 4th generation LTE mobile communication technology. It is an evolution of the existing mobile communication network structure or a new radio access technology (RAT) and LTE (Long-State) through a clean-state structure. As an extended technology of Term Evolution, it supports eLTE (extended LTE), non-3GPP (e.g., WLAN) access, etc.
  • RAT new radio access technology
  • LTE Long-State
  • eLTE extended LTE
  • non-3GPP e.g., WLAN
  • the 5G system is defined as service-based, and the interaction between network functions (NF) within the architecture for the 5G system can be expressed in two ways as follows.
  • NF network functions
  • NF - Reference point representation Interaction between NF services within NFs described by a point-to-point reference point (e.g., N11) between two NFs (e.g., AMF and SMF) indicates.
  • a point-to-point reference point e.g., N11
  • two NFs e.g., AMF and SMF
  • Network functions eg, AMF
  • CP control plane
  • This expression also includes point-to-point reference points if necessary.
  • 5GC may include various components, some of which include access and mobility management function (AMF), session management function (SMF), and policy control function. (policy control function, PCF), user plane function (UPF), application function (AF), unified data management (UDM), and non-3GPP interworking function (N3IWF).
  • AMF access and mobility management function
  • SMF session management function
  • policy control function policy control function
  • PCF user plane function
  • UPF user plane function
  • AF application function
  • UDM unified data management
  • N3IWF non-3GPP interworking function
  • the UE is connected to the data network via UPF through NG-RAN (next generation radio access network) including gNB.
  • NG-RAN next generation radio access network
  • the UE may be provided with data services through an untrusted non-3GPP access, for example, a wireless local area network (WLAN).
  • WLAN wireless local area network
  • N3IWF may be deployed.
  • N3IWF performs the function of managing non-3GPP access and interworking between 5G systems. If the UE is connected to a non-3GPP access (e.g. WiFi aka IEEE 802.11), the UE can connect to the 5G system via N3IWF. N3IWF performs control signaling with AMF and is connected to UPF through the N3 interface for data transmission.
  • a non-3GPP access e.g. WiFi aka IEEE 802.11
  • N3IWF performs control signaling with AMF and is connected to UPF through the N3 interface for data transmission.
  • AMF can manage access and mobility in 5G systems.
  • AMF can perform the function of managing NAS (non-access stratum) security.
  • AMF may perform the function of handling mobility in an idle state.
  • UPF performs the function of a gateway to transmit and receive user data.
  • the UPF node can perform all or part of the user plane functions of S-GW (serving gateway) and P-GW (packet data network gateway) of 4th generation mobile communication.
  • UPF operates as a boundary point between the next generation radio access network (next generation RAN, NG-RAN) and the core network, and is an element that maintains the data path between gNB and SMF. Additionally, when the UE moves across the area served by the gNB, the UPF serves as a mobility anchor point. UPF can perform the function of handling PDUs. For mobility within NG-RAN (e.g. NG-RAN defined in 3GPP Release-15 and later), UPF can route packets. Additionally, UPF can be used in other 3GPP networks (e.g., RAN defined before 3GPP Release-15), e.g., universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN), evolved-UTRAN (E-UTRAN), or GERAN. It may also function as an anchor point for mobility with (global system for mobile communication (GSM)/enhanced data rates for global evolution (EDGE) radio access network). UPF may correspond to the termination point of the data interface toward the data network.
  • GSM global
  • PCF is a node that controls the operator's policy.
  • AF is a server that provides various services to the UE.
  • UDM is a server that manages subscriber information, like HSS (home subscriber server) in 4th generation mobile communication.
  • UDM 460 stores and manages subscriber information in a unified data repository (UDR).
  • UDR unified data repository
  • the SMF may perform the function of allocating the IP (Internet protocol) address of the UE. And, SMF can control protocol data unit (PDU) sessions.
  • IP Internet protocol
  • PDU protocol data unit
  • reference numerals for AMF, SMF, PCF, UPF, AF, UDM, N3IWF, gNB, or UE may be omitted, and the operation is performed by referring to matters described in standard documents published before this document. can do.
  • FIG. 3 is a diagram illustrating an example of the structure of a wireless communication system applied to the present disclosure expressed from a node perspective.
  • the UE is connected to a data network (DN) through the next generation RAN.
  • the control plane function (CPF) node is all or part of the functions of the mobility management entity (MME) of 4th generation mobile communication, and all of the control plane functions of the serving gateway (S-GW) and PDN gateway (P-GW). Or do some of it.
  • CPF nodes include AMF and SMF.
  • the UPF node functions as a gateway through which user data is transmitted and received.
  • the authentication server function (AUSF) authenticates and manages the UE.
  • the Network Slice Selection Function (NSSF) is a node for network slicing as will be described later.
  • the network exposure function provides a mechanism to securely expose the services and functions of the 5G core.
  • N1 represents a reference point between UE and AMF.
  • N2 represents a reference point between (R)AN and AMF.
  • N3 represents a reference point between (R)AN and UPF.
  • N4 represents the reference point between SMF and UPF.
  • N5 represents the reference point between PCF and AF.
  • N6 represents the reference point between UPF and DN.
  • N7 represents the reference point between SMF and PCF.
  • N8 represents a reference point between UDM and AMF.
  • N9 represents a reference point between UPFs.
  • N10 represents a reference point between UDM and SMF.
  • N11 represents a reference point between AMF and SMF.
  • N12 represents the reference point between AMF and AUSF.
  • N13 represents the reference point between UDM and AUSF.
  • N14 represents a reference point between AMFs.
  • N15 represents the reference point between the PCF and the AMF in a non-roaming scenario, and the reference point between the AMF and the PCF of the visited network in the roaming scenario.
  • N16 represents a reference point between SMFs.
  • N22 represents a reference point between AMF and NSSF.
  • N30 represents the reference point between PCF and NEF.
  • N33 may represent a reference point between AF and NEF, and the above-described entities and interfaces may be configured with reference to matters described in standard documents published prior to this document.
  • N58 represents a reference point between AMF and NSSAAF.
  • N59 represents a reference point between UDM and NSSAAF.
  • N80 represents a reference point between AMF and NSACF.
  • N81 represents a reference point between SMF and NSACF.
  • the air interface protocol is based on the 3GPP wireless access network standard.
  • the air interface protocol consists of a physical layer, a data link layer, and a network layer horizontally, and a user plane and control signal for data information transmission vertically. It is divided into a control plane for signaling transmission.
  • 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) standard model, which is widely known in communication systems. It can be divided into:
  • Figure 4 is a diagram showing an example of the structure of a radio interface protocol between a UE and a gNB.
  • the access stratum (AS) layer includes a physical (PHY) layer, a medium access control layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer.
  • PHY physical
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • the terminal when a terminal performs a connection in a terrestrial network, the terminal may perform the connection through a fixed base station.
  • a connection coverage cell in a terrestrial network may always be a cell with a fixed size. That is, in a fixed base station, the size of the cell does not need to change flexibly and can always have a fixed size. Therefore, when managing the connection of a terminal in a network, the tracking area (TA) unit can be fixed at the cell level.
  • TA tracking area
  • the tracking area (TA) unit can be fixed at the cell level.
  • an existing wireless system e.g. LTE
  • multiple adjacent base stations could be grouped into one group and assigned one TA. That is, a TA including each base station can be configured in advance, and based on this, the TA unit can be fixed at the cell level.
  • the terminal may obtain service area list information indicating a service grant area based on a registration procedure or a terminal configuration update procedure.
  • the service area list may include information about a grant area list in which service is granted or a non-grant list.
  • the terminal may allow the service from all TAs within the registered PLMN or equivalent PLMN within the registration area. It is determined that it is granted, and the stored granted area list or non-granted area list can be deleted.
  • the terminal when the terminal receives a service area list containing service grant area information, and the list stored in the terminal is a TAI list for the grant area, the terminal deletes the stored grant area TAI list, The granted area TAI list can be stored based on the newly received service area list information.
  • the terminal receives a service area list containing service grant area information, and the list stored in the terminal is a TAI list for the non-grant area, the terminal deletes the non-grant area TAI list and The granted area TAI list can be stored based on the service area list information.
  • the terminal when the terminal receives a service area list containing service non-licensed area information, and the list stored in the terminal is a TAI list for the non-licensed area, the terminal receives the stored non-licensed area The TAI list can be deleted, and the non-licensed area TAI list can be stored based on the newly received service area list information.
  • the terminal if the terminal receives a service area list containing service non-granted area information, and the list stored in the terminal is a TAI list for the granted area, the terminal deletes the granted area TAI list and the received service area A non-granted area TAI list can be stored based on the list information.
  • the satellite when the terminal performs connection based on a satellite network, the satellite may be different from the fixed base station because it orbits the Earth. Additionally, because satellites are located at high altitudes, the size of cells covered by satellites may be larger compared to terrestrial networks. For example, the size of a cell covered by a satellite may be large enough to cover a plurality of countries, but may not be limited to a specific embodiment.
  • a satellite cell may include a plurality of TAs. That is, one satellite cell can broadcast a plurality of TAs included in coverage to the terminal.
  • the AS (assess stratum) layer of the terminal may inform the terminal's non-access stratum (NAS) of a plurality of TAs received through broadcasting.
  • the AS layer of the terminal may inform the NAS layer of the terminal of one TA selected from among a plurality of TAs, and may not be limited to a specific embodiment.
  • the terminal may obtain a TAI list by receiving an initial registration grant message or a mobility registration grant message from the network. Specifically, when the terminal performs initial connection to the network, the terminal may transmit an initial registration request message to the network. Afterwards, if the network allows registration of the terminal, the network may transmit a registration grant message to the terminal.
  • the registration grant message may include a new TAI list for the terminal. When the terminal receives the registration grant message and confirms the new TAI list, it can delete the existing TAI list and update it with the new TAI list.
  • the terminal may transmit a mobility registration request message to the network.
  • the terminal may transmit a mobility registration request message to the network based on the terminal's movement or a preset period.
  • the network may check the mobility registration request message of the terminal and transmit a registration grant message to the terminal.
  • the registration grant message may include a new TAI list for the terminal.
  • the terminal can store the TAI list.
  • the terminal detects a new TA that is not included in the TAI list, that is, based on terminal mobility, the terminal moves to a cell with a new TAC and acquires the TAC, and the TAI list stored in the NAS layer in the AS layer of the terminal
  • the terminal may perform a mobility and periodic registration update procedure. Through this, the terminal can obtain an updated TAI list from the network.
  • the TAI list of the terminal may be deleted when the terminal receives a rejection message from the network due to authentication failure.
  • the terminal receives an authentication failure message based on a service unavailable area, the TAI list of the terminal may be deleted. That is, the TAI list stored in the terminal can be newly updated or deleted, and is not limited to a specific form.
  • a mobility and periodic registration update procedure may be performed when a terminal connected to the core network performs a registration procedure.
  • the terminal may transmit a registration request message to the access and mobility management function (AMF) and receive a registration grant message.
  • AMF access and mobility management function
  • the terminal may transmit a registration request message.
  • the terminal may transmit a registration request message when the terminal detects that a specific TA has been deleted from the TAI list stored by the terminal.
  • the terminal may transmit a registration request message.
  • the terminal may transmit a registration request message when the periodic registration update timer expires in the idle state.
  • the terminal may perform mobility and periodic registration updates by transmitting a registration request message, and is not limited to a specific form.
  • the terminal can access the network through satellite RAN.
  • the satellite RAN may be different from the fixed network that exists on Earth. Satellites can be configured to orbit the Earth and can transmit and receive data to cells (or satellite cells) configured by a satellite RAN.
  • a cell in a terrestrial network may be a fixed cell.
  • cells provided by a satellite network may be moving cells, but are not limited thereto.
  • FIG. 5 is a diagram illustrating a method in which a cell includes a plurality of tracking areas (TA) based on a mobile cell applicable to the present disclosure.
  • the cell may move according to the movement of the satellite.
  • the cell may be located in TA1 (510) as a geographic location, and the cell may indicate TA1 (510) as the cell's TA based on a broadcast method.
  • the cell may be located at TA2 (520) based on the movement of the satellite, and the cell may indicate TA2 (520) as the cell's TA based on a broadcast method.
  • the TA of a cell may be different based on the movement of the satellite, and a mobile cell may include a plurality of TAs.
  • TAI tracking area identity
  • TAI selection tracking area identity selection
  • registration area concept registration area concept
  • forbidden area concept forbidden area concept
  • service area concept service area concept
  • mobility Registration trigger conditions may be set differently.
  • Figure 6 is a diagram showing a method of broadcasting TA based on satellite movement applicable to the present disclosure.
  • the TA indicated by the cell may be different based on the movement of the satellite 610, as described above.
  • the satellite 610 may move over time.
  • the satellite 610 may exist at a location forming a satellite cell including a partial area between TA1 and TA2 at time T1.
  • the satellite 610 may move from TA1 to TA2.
  • the satellite 610 may move to a position forming a satellite cell including a partial area of TA1 and a partial area of TA2 at time T2, and may move to a position forming a satellite cell in the TA2 area at time T3.
  • the satellite cell can broadcast TA1 and TA2 to indicate the satellite cell's TA.
  • the satellite cell can broadcast TA1 and TA2 at T2 time, and only TA2 can be broadcast at T3 time.
  • the terminal when the terminal is located at TA1 at time T1, the terminal can obtain information about TA1 and TA2 through broadcast information, and there is a need to decide which TA to select. Additionally, when the UE is located at TA2 at time T2, the UE receives TA1 and TA2 from the RAN, so it is necessary to decide which TAI to select. On the other hand, if the UE is located at TA2 at time T3, the UE can select TA2 because the RAN broadcasts only TA2. That is, the mobile cell can broadcast a plurality of TAs based on the movement of the satellite 510, and can broadcast different TAs according to the movement of the satellite 510. Therefore, the terminal may need a method to select a TA based on the movement of the satellite.
  • a tracking area can be identified by a tracking area identity (TAI).
  • TAI may be composed of a public land mobile network (PLMN) ID and a tracking area code (TAC).
  • TAI may be composed of mobile country code (MCC), mobile network code (MNC), and TAC.
  • MCC may be a code that identifies the country where the PLMN is located
  • MNC may be a code that identifies the PLMN in that country.
  • TAC is a code with a fixed length and may be a code for identifying a tracking area within the PLMN. Accordingly, the tracking area can be identified within the PLMN based on the TAI consisting of the PLMN ID and TAC.
  • the information element of TAI may be as shown in Table 1 below, but may not be limited thereto.
  • the TAI list may be composed of a PLMN ID and at least one TAC.
  • the TAI list may include at least one "partial tracking area identity list" as shown in Table 2 below, and the "partial tracking area identity list” may be as shown in Tables 3 to 5 below, but is not limited thereto. Maybe not.
  • the TAI list may be composed of a combination of a PLMN ID and at least one TAC, and may be composed of different forms based on the “partial tracking area identity list” type, and may be configured in a specific form. It may not be limited to.
  • Mobility restriction may mean restricting mobility processing or service access of a user equipment (UE).
  • the mobility restriction function may be provided in the terminal, radio access network, and core network, and specific details may be as shown in Table 6 below.
  • the terminal and network may not be applied when accessing the network for emergency services, but the application is not limited to this.
  • service area restrictions and prohibited area handling for the CM-idle state and CM-connected state in the RRC inactive state may be performed by the terminal based on information received from the core network.
  • mobility restrictions for the CM-connected state in the RRC connected state may be performed by the radio access network and the core network.
  • the core network may provide mobility restrictions within the mobility restriction list to the wireless access network.
  • mobility restrictions may consist of RAT restrictions, prohibited areas, service area restrictions, core network type restrictions, and closed access group information, each of which may be as follows.
  • the radio access network may consider per-PLMN RAT restrictions when determining the target RAT and target PLMN during the handover procedure. Additionally, RAT restrictions are performed in the network and may not be provided to the terminal.
  • the exclusion zone may apply to 3GPP access or non-3GPP access. Additionally, support for exclusion zones with NR satellite access can be established and is not limited to any particular type.
  • the terminal can define an area in which it may or may not initiate communication with the network as follows.
  • the terminal can initiate communication with the network as permitted by subscription.
  • the unauthorized area may be a service area restricted depending on the terminal's subscription. Terminals and networks cannot initiate service requests or connection requests for user plane data, control plane data, exception data reporting, or SM signals (except PS data off state change reporting) that obtain terminal services not related to mobility.
  • the terminal may not use unauthorized area entry as a trigger for cell reselection, PLMN selection, or domain selection for a terminal-originated session or call.
  • the RRC procedure of a terminal in the CM-connected state with RC disabled may not change compared to when the terminal is in the allowed area. Additionally, the RM procedure remains unchanged compared to when the terminal is in the permitted zone. Additionally, a terminal located in an unallowed area may respond to a network paging or NAS notification message obtained from the non-3GPP access core based on service request and RAN paging.
  • a terminal located in an unallowed area may initiate MA PDU session establishment or activation through non-3GPP access other than wired access, but user plane resources of 3GPP access to the MA-PDU may not be established or activated. Additionally, specific details related to mobility restrictions may be as follows.
  • Each service area limit may include one or more tracking areas (e.g. up to 16). Additionally, as an example, the service area limitation may be set to be unlimited. (i.e. includes all tracking areas in PLMN). As an example, a terminal's subscription data in Unified Data Management (UDM) may include allowable or disallowed areas designated using explicit tracking area IDs and/or other geographic information (e.g. longitude/latitude, zip code, etc.). Service area restrictions may be included. Here, the geographic information used to specify allowed or disallowed areas is managed only by the network, and the network can map the service area restriction information to the TA list before delivering it to the PCF, NG-RAN, and UE.
  • UDM Unified Data Management
  • the AMF may provide the terminal with a service area restriction consisting of a permitted area or a non-allowed area.
  • a service area restriction consisting of a permitted area or a non-allowed area.
  • the permitted area included in the service area limitation may be pre-configured and/or dynamically allocated by AMF.
  • the allowable area may be configured to be unlimited, but is not limited thereto, and specific details may be as shown in Table 7 below.
  • a mobile cell based satellite network may indicate one or more tracking area codes (TAC) for each PLMN.
  • TAI may be composed of a combination of TAC and PLMN. Therefore, the terminal can configure TAI through the indicated TAC and PLMN.
  • a terminal registered in a PLMN may not perform a mobility registration update procedure within at least one TAC supported in the PLMN registered as the terminal's registration area.
  • the terminal may perform a mobility registration update procedure when accessing a cell in an area not included in the TAC supported by the PLMN registered as the terminal's registration area. That is, the terminal can perform a mobility registration update procedure when it searches for a cell in the TAC that is not included in the TAC in the registration area.
  • TA may be a value based on a fixed location, and since the cell moves according to the movement of the satellite, the TAC value broadcast as system information of the cell in the RAN may change.
  • the RAN may broadcast one or more TACs for the PLMN, and may add or remove TAC values as the cell moves. Additionally, as an example, based on the broadcast TAC, the RAN may provide one TAI corresponding to one TAC or all TAIs corresponding to all broadcast TACs to the AMF based on user location information (ULI). .
  • ULI user location information
  • ULI may be transmitted from RAN to AMF through NGAP message, but is not limited to a specific embodiment.
  • the TAI information may be transmitted to the AMF.
  • AMF can select the TAI by considering the registration area of the terminal.
  • AMF can receive one TAI or all TAIs from the RAN.
  • the AMF may transmit a registration rejection message if all TAIs received from the RAN are prohibited based on subscription data. Accordingly, terminal communication may be prohibited.
  • the AMF can transmit a registration grant message if any of the TAIs are not prohibited. In other words, the terminal can determine that communication is not prohibited if one of the TAIs is not prohibited.
  • the AMF may transmit a registration rejection message if the corresponding TA is prohibited based on subscription data. Accordingly, terminal communication may be prohibited.
  • the AMF can instruct the terminal about the service registration area based on the granted area and the unlicensed area.
  • the terminal and the AMF may determine that they are located in an unlicensed area if all TAIs are not granted.
  • the terminal and the AMF may determine that they are located in an unlicensed area if all TAIs are not granted.
  • one TAI among all TAIs is permitted, it can be determined to be located in the permitted area.
  • the terminal may not trigger a mobility registration update when at least one TAI is included in the terminal's registration area. That is, the terminal may not perform mobility registration update if any of the TAIs corresponding to the broadcasted TAC are included in the registration area.
  • a satellite network may be referred to as a non-terrestrial network (NTN) or other names, and is not limited to a specific name. However, in the following, it is referred to as a satellite network for convenience of explanation, but it may not be limited thereto.
  • NTN non-terrestrial network
  • the terminal may attempt to connect to a satellite network (e.g. satellite NG RAN).
  • a satellite network e.g. satellite NG RAN
  • the UE receives reason code # 78 (cause code #78, hereinafter specific reason code) based on connection to the satellite NG RAN
  • the UE receives the PLMN ID, geographic location, and UE implementation-specific timer value (UE).
  • the “PLMNs not allowed to operate at the present UE location” list can be managed based on at least one of the following: implementation specific timer value).
  • the specific reason code may be a reason code indicating that access to the PLMN that delivered the specific reason code is not permitted at the current location of the terminal.
  • the “PLMNs not allowed to operate at the present UE location” list may be a list of PLMNs that are not allowed to operate at the current location of the UE.
  • the terminal can obtain a specific reason code for the PLMN to which access is not permitted based on the current location of the terminal, and manage a list of PLMNs to which operation is not permitted in the terminal's current location based on the specific reason code.
  • the names of the above-mentioned list may be different and are not limited to a specific form.
  • PLMN list to which access is not permitted at the current location of the terminal it is referred to as "PLMN list to which access is not permitted at the current location of the terminal", but this name may not be limited.
  • the PLMN list to which access is not permitted at the terminal's current location may include three or more lists.
  • each of the three or more lists may include a PLMN ID, geographic location, and terminal implementation-specific timer value.
  • the terminal can store the PLMN ID that transmitted a message including a specific reason code (e.g. cause value #78) through satellite NG-RAN.
  • a specific reason code e.g. cause value #78
  • the network may indicate the location of the terminal to the terminal along with a specific reason code.
  • the geographical location may be composed of Cell ID and PLMN ID based on the terminal location received from the RAN.
  • the geographical location may be the location of the terminal received from a location service (LCS), and may be configured in the form of a Global Navigation Satellite System (GNSS) based on a Geographical Area Description (GAD).
  • LCS location service
  • GNSS Global Navigation Satellite System
  • GID Geographical Area Description
  • the terminal can check whether the location information and location information measured by the terminal match. In other words, the terminal checks whether the received location information matches the measured location information and determines whether to include the corresponding PLMN in the PLMN list (PLMNs not allowed to operate at the present UE location). You can decide whether or not.
  • the exact mobility of the terminal can be clearly recognized by the terminal and may not be accurately predicted by the network. Additionally, if the terminal is at a country boundary, even a small change in location may result in differences in whether or not it is included in the border, so accurate location information of the terminal may be required. In the above-described case, a malfunction may occur in which the terminal is prohibited from accessing an accessible PLMN. Taking the above-described point into consideration, the terminal may compare the measured location information and the received location information. This will be described later.
  • the terminal may store a terminal implementation-specific timer value.
  • the terminal may directly obtain a terminal implementation-specific timer value.
  • the terminal may obtain a terminal implementation-specific timer value from the network.
  • the terminal may set a terminal implementation-specific timer value that is not set to a value smaller than the value indicated by the network, but is not limited to this.
  • the network may selectively indicate the above-described terminal implementation-specific timer value and geographic location value to the terminal. That is, the network may or may not indicate terminal implementation-specific timer values and geographic location values based on certain conditions.
  • the terminal can select a PLMN by checking whether a PLMN connection is available based on three values in the PLMN list for which connection is not permitted at the current location of the terminal. Specifically, if a timer is running in relation to the entry of a specific PLMN, the terminal determines that the PLMN is included in the list of PLMNs to which access is not permitted at the current location of the terminal, and will not perform access to the PLMN. You can.
  • the terminal may determine that the PLMN is in an area where the PLMN is not permitted if the distance between the geographic location and the current location of the terminal in relation to the entry of the corresponding PLMN is less than a preset value.
  • the preset value may be a UE implementation specific value, but may not be limited thereto. If the distance between the geographic location and the current location of the terminal is less than a preset value, the terminal may determine that the corresponding PLMN is included in the PLMN list to which connection is not permitted at the current location of the terminal and may not perform the connection.
  • the PLMN list to which access is not permitted at the current location of the terminal may be deleted when the Universal Subscriber Identity Module (USIM) of the terminal is removed and reset.
  • USB Universal Subscriber Identity Module
  • a list of PLMNs to which access is not permitted at the current location of the terminal can be maintained to record the status when switched on again.
  • the terminal may receive a registration reject message including a specific reason code (e.g. cause value #78) in a mobility registration procedure or initial registration procedure.
  • the terminal may receive a message containing a specific reason code (e.g. cause value #78) during a de-registration procedure.
  • the terminal may receive a service reject message including a specific reason code (e.g. cause value #78). That is, the terminal can obtain a reason value for the PLMN list to which access is not permitted at the terminal's current location.
  • the terminal can configure a PLMN list to which access is not permitted based on location information, and receive location information of the terminal along with a specific reason code.
  • a problem may occur in which a PLMN list that is not permitted to access the terminal's current location is formed based on the incorrect terminal location.
  • a PLMN that does not need to be blocked may be blocked during the PLMN selection process, and the UE may not be able to select the corresponding PLMN. Accordingly, deadlock may occur in the terminal.
  • the terminal cannot connect to an accessible PLMN until the USIM is disconnected and restarted or the timer expires. That is, if the actual location of the terminal and the location of the terminal configured in the network are different, a problem may occur in which the terminal cannot connect to a PLMN that is accessible from the terminal location. Based on the above, the following describes a method of promoting network stability by performing error handling through terminal instructions in an invalid NW configuration.
  • the AMF can check whether the PLMN is accessible based on the terminal location. If the terminal can connect to the corresponding PLMN at the terminal location, the AMF transmits a connection grant message from the network to the terminal, and the terminal can connect to the corresponding PLMN. On the other hand, if the terminal cannot access the corresponding PLMN at the terminal's location, the AMF may transmit a connection unavailable message from the network to the terminal.
  • the connection inaccessibility message may include a specific reason value (cause value #78) as the reason for the connection inability.
  • the connection impossible message may indicate to the terminal the terminal location determined by the network as the location of the terminal. As an example, a specific reason value may indicate that connection to the corresponding PLMN is not possible from the terminal location, as described above.
  • the terminal can check whether the location information transmitted from the network is accurate. For example, if the terminal location information transmitted from the network matches the terminal location information measured by the terminal, the terminal may determine that it has received normal connection information from the network.
  • the terminal compares the current location of the terminal with the location information indicated by the network, and if they are the same, the network provides accurate information. You can confirm that access to the relevant PLMN is prohibited. Afterwards, the terminal may store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN) list. Afterwards, the terminal can transition to idle mode and perform PLMN selection. At this time, the PLMN in question may be excluded from the candidate PLMN because it exists in the PLMN not allowed to operate in UE location (PLMN) list, and the terminal can search for and select another PLMN.
  • PLMN UE location
  • the terminal can confirm that the network has provided abnormal connection information.
  • the terminal when the network prohibits access to the corresponding PLMN with a specific reason value #78 (cause value #78), the terminal compares the current location of the terminal with the location information indicated by the network, and if there is a difference, the network provides incorrect information. You can use this to confirm that PLMN access is prohibited. Therefore, the UE may not store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN) list. Afterwards, the terminal can transition to idle mode and perform PLMN selection. At this time, since the corresponding PLMN does not exist in the PLMN not allowed to operate in UE location (PLMN) list, it can be included in the candidate PLMN, and the terminal can search for and select the corresponding PLMN.
  • the terminal may confirm the currently selected PLMN or registered PLMN as the PLMN where the terminal is currently located.
  • the network provides CGI (Cell Global Identity) information as the terminal location
  • the PLMN ID in the CGI can be compared with the PLMN selected or registered by the terminal.
  • CGI may include PLMN, location are code (LAC), and cell identification (CI).
  • LAC location are code
  • CI cell identification
  • the terminal can receive GNSS from the network based on the GAD information and compare the terminal's GNSS (Global Navigation Satellite System). .
  • GAD Global Area Description
  • GNSS Global Navigation Satellite System
  • the terminal can confirm that it has accurately determined its location in the network.
  • the terminal can confirm that the network has determined its location abnormally.
  • the network may use GAD information as the terminal location and provide GNSS information to the terminal.
  • the terminal can use GNSS information provided from the network to check which country the location belongs to. Additionally, the terminal can use the terminal's GNSS information to check which country the location is included in.
  • the terminal can confirm that the network has accurately determined its location.
  • the terminal can confirm that the network has determined the terminal's location abnormally.
  • the network when the terminal performs an initial registration request through a satellite NG-RAN cell, if the terminal is in an inaccessible location, the network sends the terminal geographical information with a specific reason value (cause value #78).
  • Location (UE geographic location) information can also be indicated to the terminal.
  • the terminal geographic location information may be CGI information included in user location information (ULI), but may not be limited thereto.
  • the terminal may not store the PLMN in the PLMN not allowed to operate in UE location (PLMN not allowed to operate in UE location) list. , which is the same as described above.
  • the network determines whether the terminal exists in an inaccessible location. You can. As an example, the network can use the ULI provided from the RAN to determine whether the terminal is in an inaccessible location. Here, if the terminal exists in an unreachable location, the network may transmit a registration reject message to the terminal. At this time, the network may deliver a registration rejection message containing UE geographic location information along with a specific reason value (cause value #78) to the terminal. As an example, the terminal geographic location information may be CGI information included in user location information (ULI), but may not be limited thereto.
  • ULI user location information
  • the network can use terminal information provided from a location management function (LMF) to determine whether the terminal exists in an inaccessible location.
  • LMF location management function
  • the network may transmit a registration reject message to the terminal.
  • the network may instruct the terminal by including UE geographic location information along with a specific reason value (cause value #78) in the registration rejection message.
  • the terminal geographic location information may be GAD information, but may not be limited thereto.
  • the registration reject message may include terminal geographic location information as shown in Table 10 below, but this is the same as described above.
  • the terminal may store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN not allowed to operate in UE location) list, as described above. same.
  • the terminal may not store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN) list, which is Same as described above.
  • the terminal sets the 5GS update status to "5U3 ROAMING NOT ALLOWED" and deletes the 5G-GUTI, the last visited and registered tracking area identity (TAI), the TAI list, and the ngKSI. You can. Additionally, the terminal may delete the list of equivalent PLMNs if possible and reset the registration attempt counter. Here, the terminal can store the PLMN ID. Additionally, if the terminal is aware of its current geographic location based on an entry in a PLMN list that is not permitted to connect at the terminal's current location, the terminal may operate a corresponding timer.
  • the terminal may switch to the "5GMMDEREGISTERED.PLMN-SEARCH” state and perform PLMN selection, but may not be limited thereto. That is, the terminal can store the PLMN ID that delivered a specific reason code (cause code #78) and start a timer related to the PLMN ID based on the current geographic location of the terminal.
  • a specific reason code cause code #78
  • the deregistration request message may include terminal geographic location information as shown in Table 12 below, but this is the same as described above.
  • the terminal may store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN not allowed to operate in UE location) list, as described above. same.
  • the terminal may not store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN) list, which is Same as described above.
  • the network can determine whether the terminal exists in a location where access is not possible. As an example, the network can use the ULI provided from the RAN to determine whether the terminal is in an inaccessible location. Here, if the terminal is in an inaccessible location, the network may transmit a service reject message to the terminal. At this time, the network may indicate UE geographic location information to the terminal along with a service rejection message and a specific reason value (cause value #78). As an example, the terminal geographic location information may be CGI information included in user location information (ULI), but may not be limited thereto.
  • ULI user location information
  • the network can use terminal information provided from a location management function (LMF) to determine whether the terminal exists in an inaccessible location.
  • LMF location management function
  • the network may transmit a service reject message to the terminal.
  • the network may deliver a service rejection message containing UE geographic location information along with a specific reason value (cause value #78) to the terminal.
  • the terminal geographic location information may be GAD information, but may not be limited thereto.
  • a service reject message may include terminal geographic location information as shown in Table 14 below, but this is the same as described above.
  • the terminal may store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN not allowed to operate in UE location) list, as described above. same.
  • the terminal may not store the corresponding PLMN in the PLMN not allowed to operate in UE location (PLMN) list, which is Same as described above.
  • the network can provide terminal location information to the terminal along with a specific reason code (cause value #78).
  • information elements for terminal location information may be as shown in Table 15 below.
  • the terminal location information may include at least one of a terminal location information content length, a terminal location information type, and a terminal location information information element.
  • the terminal location information type may be as shown in Table 16 below.
  • the terminal location information type is a ULI type and may be CGI information.
  • the terminal location information type is an LMF type and may be GAD information, as described above.
  • the terminal location information when the terminal location information is a ULI type, the terminal location information may include CGI information consisting of 8 octets.
  • CGI may include PLMN ID (MCC+MNC), location are code (LAC), and cell identification (CI).
  • MCC+MNC PLMN ID
  • LAC location are code
  • CI cell identification
  • the terminal can compare the PLMN ID in the CGI as ULI type location information received from the network with the PLMN ID with which the terminal is registered to determine whether the location information matches, as described above.
  • the network can confirm the terminal location information by receiving terminal location information from the LMF.
  • the location information provided from the LMF may be GAD information.
  • the terminal can compare GAD information as LMF type location information received from the network with the terminal's GNSS information to determine whether the location information matches, as described above.
  • FIG. 7 is a flowchart showing terminal operations applicable to the present disclosure.
  • the terminal can connect to a network (S710).
  • the network may be a satellite network, as described above.
  • the terminal when connection is not possible to the first PLMN (public land mobile network) to which the terminal attempted to connect based on the UE location (720), the terminal indicates that connection to the first PLMN is not possible at the terminal location.
  • a cause value, a first PLMN ID, and first terminal location information may be received.
  • the terminal compares the first terminal location information and the second terminal location information, and compares the first terminal location information with the second terminal location information.
  • the terminal location information Based on whether the terminal location information matches, it can be decided whether to include the first PLMN ID in the PLMN (PLMNs not allowed to operate at the present UE location) list that is not allowed to access at the terminal location (S740). , If connection is possible in the first PLMN where the terminal attempted connection based on the terminal location, the terminal may receive a connection grant message from the network (S750) and perform connection to the network (S760).
  • Figure 8 is a flowchart showing terminal operations applicable to the present disclosure.
  • the terminal can determine whether to include the first PLMN ID in the PLMN list to which access is not permitted at the terminal location based on whether the first terminal location information matches the second terminal information.
  • the second terminal location information may be terminal location information measured by the terminal, and the first terminal location information may be terminal location information received from the network.
  • the first terminal location information may include at least one of a terminal location information content length, a terminal location information type, and a terminal location information information element.
  • the network determines the terminal location by receiving user location information (ULI) from a radio access network (RAN), and the terminal uses CGI (CGI) as the first terminal location information.
  • CGI CGI
  • cell global identity information can be received from the network.
  • the CGI information includes a first PLMN ID, a location are code (LAC), and a cell identification (CI), and the terminal uses the first terminal location information and the second terminal based on whether the first PLMN ID matches the second PLMN ID.
  • the second PLMN may be the terminal's registered PLMN or a selected PLMN.
  • the network determines the terminal location by receiving the first terminal location information from a location management function (LMF), and the terminal receives the first terminal location information as the first terminal location information.
  • LMF location management function
  • a first GNSS global navigation satellite system
  • GAD geographical area description
  • the terminal determines whether the first terminal location information and the second terminal location information match based on whether the first GNSS and the second GNSS match, and the second GNSS may be the terminal's GNSS.
  • the terminal determines whether the first terminal location information and the second terminal location information match based on whether the first country information corresponding to the first GNSS matches the second country information corresponding to the second GNSS.
  • the second GNSS may be the GNSS of the terminal.
  • the terminal sets the first PLMN ID to a PLMN (PLMNs not allowed to operate at the present UE) that is not allowed to access the terminal location. location) list.
  • PLMNs PLMNs not allowed to operate at the present UE
  • location location list.
  • the terminal excludes the first PLMN from the candidate PLMN based on the PLMN list to which access is not permitted at the terminal location. You can.(S840)
  • the terminal sets the first PLMN ID to a PLMN that is not allowed to access at the terminal location (PLMNs not allowed to operate at the present UE location). It may be decided not to include it in the list.
  • PLMNs not allowed to operate at the present UE location
  • the terminal may perform PLMN selection by including the first PLMN in the candidate PLMN.
  • the cause value, the first PLMN ID, and the first terminal location information may be included in at least one of a registration rejection message and a service rejection message received from an access and management function (AMF) and transmitted to the terminal. there is.
  • AMF access and management function
  • the terminal may further receive timer value and distance value information along with the reason value, first PLMN ID, and first terminal location information.
  • the timer value may be time information for which the reason value is valid
  • the distance value may be distance information for which the terminal location is valid.
  • Figure 9 is a diagram showing an AMF operation applicable to the present disclosure.
  • the AMF may receive a connection request message from the terminal (S910).
  • a connection request message from the terminal (S910).
  • PLMN public land mobile network
  • S920 a cause value indicating inability to connect to the first PLMN at the terminal location, a first PLMN ID, and first terminal location information may be transmitted.
  • S930 On the other hand, based on the terminal location (UE location) Therefore, if connection is possible to the first PLMN (public land mobile network) to which the terminal attempted to connect (S920), the AMF may transmit a connection grant message to the terminal (S940).
  • the terminal compares the first terminal location information and the second terminal location information and, based on whether the first terminal location information and the second terminal location information match, sets the first PLMN ID to a PLMN (PLMNs) to which access is not permitted at the terminal location. You can decide whether to include it in the (not allowed to operate at the present UE location) list. On the other hand, if connection is possible in the first PLMN where the terminal attempted connection based on the terminal location, the terminal may receive a connection grant message from the network and perform connection to the network.
  • the second terminal location information may be terminal location information measured by the terminal
  • the first terminal location information may be terminal location information received from the network.
  • the first terminal location information may include at least one of a terminal location information content length, a terminal location information type, and a terminal location information information element.
  • the network determines the terminal location by receiving user location information (ULI) from a radio access network (RAN), and the terminal uses CGI (CGI) as the first terminal location information.
  • CGI CGI
  • cell global identity information can be received from the network.
  • the CGI information includes a first PLMN ID, a location are code (LAC), and a cell identification (CI), and the terminal uses the first terminal location information and the second terminal based on whether the first PLMN ID matches the second PLMN ID.
  • the second PLMN may be the terminal's registered PLMN or a selected PLMN.
  • the network determines the terminal location by receiving the first terminal location information from a location management function (LMF), and the terminal receives the first terminal location information as the first terminal location information.
  • LMF location management function
  • a first GNSS global navigation satellite system
  • GAD geographical area description
  • the terminal determines whether the first terminal location information and the second terminal location information match based on whether the first GNSS and the second GNSS match, and the second GNSS may be the terminal's GNSS.
  • the terminal determines whether the first terminal location information and the second terminal location information match based on whether the first country information corresponding to the first GNSS matches the second country information corresponding to the second GNSS.
  • the second GNSS may be the GNSS of the terminal.
  • the terminal sets the first PLMN ID to a PLMN (PLMNs not allowed to operate at the present UE) that is not allowed to access the terminal location. You can decide to include it in the location) list.
  • the terminal may exclude the first PLMN from the candidate PLMN based on the list of PLMNs that are not permitted to access at the terminal location.
  • the terminal sets the first PLMN ID to a PLMN that is not allowed to access at the terminal location (PLMNs not allowed to operate at the present UE location). You can decide not to include it in the list.
  • the terminal may perform PLMN selection by including the first PLMN in the candidate PLMN.
  • the terminal may further receive timer value and distance value information along with the reason value, first PLMN ID, and first terminal location information.
  • the timer value may be time information for which the reason value is valid
  • the distance value may be distance information for which the terminal location is valid.
  • examples of the proposed methods described above can also be included as one of the implementation methods of the present disclosure, and thus can be regarded as a type of proposed methods. Additionally, the proposed methods described above may be implemented independently, but may also be implemented in the form of a combination (or merge) of some of the proposed methods.
  • a rule may be defined so that the base station informs the terminal of the application of the proposed methods (or information about the rules of the proposed methods) through a predefined signal (e.g., a physical layer signal or a higher layer signal). .
  • Embodiments of the present disclosure can be applied to various wireless access systems.
  • Examples of various wireless access systems include the 3rd Generation Partnership Project (3GPP) or 3GPP2 system.
  • Embodiments of the present disclosure can be applied not only to the various wireless access systems, but also to all technical fields that apply the various wireless access systems. Furthermore, the proposed method can also be applied to mmWave and THz communication systems using ultra-high frequency bands.
  • embodiments of the present disclosure can be applied to various applications such as autonomous vehicles and drones.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
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  • Astronomy & Astrophysics (AREA)
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Abstract

Selon l'invention, un procédé permettant de faire fonctionner un terminal dans un système de communication sans fil comprend les étapes dans lesquelles : le terminal tente d'accéder à un réseau ; lorsqu'un premier PLMN auquel le terminal a tenté d'accéder d'après l'emplacement de terminal n'est pas accessible, une valeur de motif indiquant que le premier PLMN n'est pas accessible à partir de l'emplacement du terminal, un premier ID de PLMN et des premières informations d'emplacement du terminal sont reçus ; les secondes informations du terminal et les premières informations d'emplacement du terminal sont comparées ; et lorsqu'il est déterminé s'il faut inclure ou non le premier ID de PLMN dans une liste de réseaux auxquels l'accès n'est pas autorisé à partir de l'emplacement du terminal, selon que les premières informations d'emplacement du terminal correspondent ou non aux secondes informations d'emplacement du terminal.
PCT/KR2023/004254 2022-03-30 2023-03-30 Procédé et dispositif pour faire fonctionner un terminal dans un système de communication sans fil WO2023191532A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210025502A (ko) * 2019-08-26 2021-03-09 에이서 인코포레이티드 셀 선택 처리 방법, 관련 네트워크 장치 및 모바일 장치
WO2022031524A1 (fr) * 2020-08-04 2022-02-10 Qualcomm Incorporated Détermination d'emplacement d'ue et vérification de pays pour un accès par satellite 5g

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210025502A (ko) * 2019-08-26 2021-03-09 에이서 인코포레이티드 셀 선택 처리 방법, 관련 네트워크 장치 및 모바일 장치
WO2022031524A1 (fr) * 2020-08-04 2022-02-10 Qualcomm Incorporated Détermination d'emplacement d'ue et vérification de pays pour un accès par satellite 5g

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Title
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on architecture aspects for using satellite access in 5G (Release 17)", 3GPP TR 23.737, no. V17.2.0, 31 March 2021 (2021-03-31), pages 1 - 95, XP052000260 *
APPLE, ERICSSON, OPPO, CHINA MOBILE: "Validity of cause code #78", 3GPP TSG-CT WG1 MEETING #133BIS-E, C1-221824, 24 February 2022 (2022-02-24), XP052115924 *
QUALCOMM INCORPORATED: "Correction to the validity conditions for cause value #78", 3GPP TSG-CT WG1 MEETING #134-E, C1-221942, 24 February 2022 (2022-02-24), XP052116001 *

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