Local service management method

Abstract

One disclosure of the present specification provides a method of performing communication by an AMF. The method comprises the steps of: wherein a hosting network hosts a local service and comprises an AMF, receiving a first registration request from a first UE; transmitting a first registration approval to the first UE; transmitting a first registration cancellation request to the first UE based on the local service has ended, the first registration cancellation request including information notifying that the local service has ended; and receiving a first registration cancellation approval from the first UE.

Description

Technical Field

[0001] This specification relates to mobile communications. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a technology for enabling high-speed packet communications. Many schemes have been proposed for the LTE goal, including those aimed at reducing user and provider costs, improving service quality, and expanding and improving coverage and system capacity. As upper layer requirements, 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of frequency bands, simple structure, open interfaces, and sufficient power consumption of terminals.

[0003] Development of requirements and specifications for New Radio (NR) systems has begun in the International Telecommunication Union (ITU) and 3GPP. 3GPP must identify and develop technical components for successful standardization of new RATs that will meet both immediate market needs and longer-term requirements set forth by the ITU Radiocommunication Sector (ITU-R) International Mobile Telecommunications (IMT)-2020 process in a timely manner. In addition, NR should be able to use any spectrum band in the range of at least up to 100 GHz that can be used for wireless communications even in the more distant future.

[0004] The goal of NR is a single technology framework that addresses all use cases, requirements and deployment scenarios, including enhanced mobile broadband (eMBB), massive machine type communications (mMTC), ultra-reliable and low latency communications (URLLC), etc. NR should be inherently forward compatible.

[0005] We need advice on the behavior of the network hosting the local service after it has been shut down. Summary of the invention

[0006] Technical Solution

[0007] After the local service is terminated, the managed network unregisters the device and notifies the device that the local service has been terminated. In addition, after the local service is terminated, the managed network deregisters multiple devices in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 An example of a communication system to which implementations of the present disclosure are applied is shown.

[0009] Figure 2 An example of a wireless device to which implementations of the present disclosure are applied is shown.

[0010] Figure 3 An example of a UE to which implementations of the present disclosure are applied is shown.

[0011] Figure 4 An example 5G system structure is illustrated to which implementations of the present specification may be applied.

[0012] Figure 5 The process according to the embodiment of the present specification is illustrated.

[0013] Figure 6 The process of AMF according to the disclosure of this specification is shown.

[0014] Figure 7 A process of a first UE according to the disclosure of this specification is shown. DETAILED DESCRIPTION

[0015] The following techniques, devices and systems can be applied to various wireless multiple access systems. Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multi-carrier frequency division multiple access (MC-FDMA) systems. CDMA can be implemented by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA). UTRA is part of 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 adopts OFDMA in DL and SC-FDMA in UL. The evolutions of 3GPP LTE include LTE-A (Advanced), LTE-A Pro and / or 5G NR (New Radio).

[0016] For the convenience of description, the implementation of the present disclosure is mainly described with respect to a 3GPP-based wireless communication system. However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP-based wireless communication system, various aspects of the present disclosure that are not limited to a 3GPP-based wireless communication system are applicable to other mobile communication systems.

[0017] For terms and techniques not specifically described among the terms and techniques used in the present disclosure, reference may be made to wireless communication standard documents published prior to the present disclosure.

[0018] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, "A or B" in the present disclosure may be interpreted as "A and / or B". For example, "A, B, or C" in the present disclosure may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0019] In the present disclosure, a slash ( / ) or a comma may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0020] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, the expression "at least one of A or B" or "at least one of A and / or B" in the present disclosure may be interpreted as being the same as "at least one of A and B".

[0021] Additionally, in the disclosure, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” Additionally, “at least one of A, B, or C” or “at least one of A, B, and / or C” may mean “at least one of A, B, and C.”

[0022] In addition, the brackets used in the present disclosure may mean "for example". In detail, when it is shown as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, the "control information" in the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". In addition, even when it is shown as "control information (ie, PDCCH)", "PDCCH" may be proposed as an example of "control information".

[0023] The technical features described separately in one drawing in the present disclosure may be implemented separately or simultaneously.

[0024] Although not limited thereto, the various descriptions, functions, processes, suggestions, methods and / or operational flowcharts of the present disclosure disclosed herein may be applied to various fields requiring wireless communication and / or connection between devices (e.g., 5G).

[0025] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings. Unless otherwise indicated, the same reference numerals in the following drawings and / or descriptions may represent the same and / or corresponding hardware blocks, software blocks and / or functional blocks.

[0026] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0027] Figure 1 The 5G usage scenarios shown are only exemplary. The technical features of the present disclosure can be applied to Figure 1 Other 5G usage scenarios not shown.

[0028] The three main requirement categories for 5G include (1) enhanced mobile broadband (eMBB) category, (2) massive machine type communications (mMTC) category, and (3) ultra-reliable and low latency communications (URLLC) category.

[0029] Reference Figure 1 , the communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300. Figure 1 A 5G network is shown as an example of a network of the communication system 1 , but implementations of the present disclosure are not limited to the 5G system and may be applied to future communication systems other than the 5G system.

[0030] BS 200 and network 300 may be implemented as wireless devices, and certain wireless devices may operate as BSs / network nodes relative to other wireless devices.

[0031] The wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or LTE), and may be referred to as communication / radio / 5G devices. The wireless devices 100a to 100f may include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. A vehicle may include an unmanned vehicle (UAV) (e.g., a drone). An XR device may include an AR / VR / mixed reality (MR) device, and may be implemented in the form of a head mounted device (HMD), a head up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smart phones, smart pads, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include televisions, refrigerators, and washing machines. IoT devices may include sensors and smart meters.

[0032] In the present disclosure, the wireless devices 100a to 100f may be referred to as user equipment (UE). For example, the UE may include a cellular phone, a smart phone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a slate personal computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle with an autonomous driving function, a connected car, a UAV, an AI module, a robot, an AR device, a VR device, an MR device, a holographic device, a public safety device, an MTC device, an IoT device, a medical device, a fintech device (or a financial device), a security device, a weather / environmental device, a device related to 5G services, or a device related to the field of the fourth industrial revolution.

[0033] For example, a UAV may be an aerial vehicle that is flown without humans aboard and is controlled by wireless signals.

[0034] For example, a VR device may include a device for realizing an object or background of a virtual world. For example, an AR device may include a device realized by connecting an object or background of a virtual world to an object or background of a real world. For example, an MR device may include a device realized by merging an object or background of a virtual world into an object or background of a real world. For example, a holographic device may include a device for realizing a 360-degree stereoscopic image by recording and reproducing stereoscopic information using a light interference phenomenon generated when two lasers meet, called holography.

[0035] For example, a public safety device may include an image relay device or an image device that may be wearable on a user's body.

[0036] For example, MTC devices and IoT devices may be devices that do not require direct human intervention or manipulation. For example, MTC devices and IoT devices may include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.

[0037] For example, a medical device may be a device for the purpose of diagnosing, curing, alleviating, treating or preventing a disease. For example, a medical device may be a device for the purpose of diagnosing, curing, alleviating or correcting an injury or trauma. For example, a medical device may be a device for the purpose of inspecting, replacing or modifying a structure or function. For example, a medical device may be a device for regulating pregnancy. For example, a medical device may include a device for treatment, a device for operation, a device for (in vitro) diagnosis, a hearing aid or a device for surgery.

[0038] For example, the safety device may be a device installed to prevent possible danger and maintain safety. For example, the safety device may be a camera, a closed-circuit TV (CCTV), a recorder or a black box.

[0039] For example, a fintech device may be a device that is capable of providing financial services such as mobile payments. For example, a fintech device may include a payment device or a point of sale (POS) system.

[0040] For example, weather / environmental devices may include devices for monitoring or predicting weather / environmental conditions.

[0041] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The 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 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, and a super 5G network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS 200 / network 300. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0042] Wireless communication / connection 150a, 150b, and 150c may be established between wireless devices 100a to 100f and / or between wireless devices 100a to 100f and BS200 and / or between BS200. In this document, wireless communication / connection may be established through various RATs (e.g., 5G NR), such as uplink / downlink communication 150a, sidelink communication or device-to-device (D2D) communication 150b, inter-base station communication 150c (e.g., relay, integrated access and backhaul (IAB)), etc. Wireless devices 100a to 100f and BS200 / wireless devices 100a to 100f may send / receive radio signals to each other through wireless communication / connection 150a, 150b, and 150c. For example, wireless communication / connection 150a, 150b, and 150c may send / receive signals through various physical channels. To this end, at least a portion of various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various proposals of the present disclosure.

[0043] AI refers to the field that studies artificial intelligence or the methods that can create it, while machine learning refers to the field that defines the various problems solved in the field of AI and the methods to solve them. Machine learning is also defined as algorithms that increase the performance of a task through steady experience with the task.

[0044] A robot means a machine that automatically processes or operates a given task through its own capabilities. In particular, a robot that has the ability to recognize the environment and determine the actions to be performed by itself can be called an intelligent robot. According to the purpose or field of use, robots can be classified as industrial, medical, household, military, etc. Robots can perform various physical operations, such as moving robot joints using actuators or motors. Mobile robots also include driven wheels, brakes, propellers, etc., allowing them to travel on the ground or fly in the air.

[0045] Autonomous driving means the technology of self-driving, and autonomous vehicles mean vehicles that are driven without user control or with minimal user control. For example, autonomous driving may include maintaining a lane while in motion, automatically adjusting speed (e.g., adaptive cruise control), automatically driving along a set route, and automatically setting a route when a destination is set. Vehicles cover vehicles equipped with an internal combustion engine, hybrid vehicles equipped with an internal combustion engine and an electric motor, and electric vehicles equipped with an electric motor, and may include trains, motorcycles, etc. as well as cars. Autonomous vehicles may be considered robots with autonomous driving capabilities.

[0046] Extended reality is collectively referred to as VR, AR, and MR. VR technology provides real-world objects and backgrounds only through computer graphics (CG) images. AR technology provides virtual CG images on top of real object images. MR technology is a CG technology that combines virtual objects into the real world. MR technology is similar to AR technology in that they display real objects and virtual objects together. However, the difference is that in AR technology, virtual objects are used as a supplementary form of real objects, while in MR technology, virtual objects and real objects are used as equal individuals.

[0047] NR supports multiple parameter sets (and / or multiple subcarrier spacing (SCS)) to support various 5G services. For example, if the SCS is 15kHz, wide areas can be supported in traditional cellular bands, and if the SCS is 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. If the SCS is 60kHz or higher, bandwidths greater than 24.25GHz can be supported to overcome phase noise.

[0048] The NR frequency band may be defined as two types of frequency ranges, namely, FR1 and FR2. The numerical values ​​of the frequency ranges may vary. For example, the two types of frequency ranges (FR1 and FR2) may be as shown in Table 1 below. For ease of explanation, in the frequency range used in the NR system, FR1 may mean "range below 6 GHz", FR2 may mean "range above 6 GHz" and may be referred to as millimeter wave (mmW).

[0049] [Table 1]

[0050] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz-6000MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0051] As described above, the numerical value of the frequency range of the NR system may be changed. For example, as shown in Table 2 below, FR1 may include a frequency band of 410 MHz to 7125 MHz. That is, FR1 may include a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed frequency band. The unlicensed frequency band may be used for various purposes, such as for communication of vehicles (e.g., autonomous driving).

[0052] [Table 2]

[0053] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0054] Here, the radio communication technology implemented in the wireless device in the present disclosure may include narrowband Internet of Things (NB-IoT) technology for low power communication as well as LTE, NR and 6G. For example, NB-IoT technology may be an example of low power wide area network (LPWAN) technology, which may be implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and may not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present disclosure may be based on LTE-M technology communication. For example, LTE-M technology may be an example of LPWAN technology and is referred to as various names such as enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented in at least one of various specifications such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and may not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present disclosure may include at least one of ZigBee, Bluetooth, and / or LPWAN considering low power communication, and may not be limited to the above names. For example, ZigBee technology may generate a personal area network (PAN) associated with small / low power digital communication based on various specifications such as IEEE 802.15.4, and may be referred to as various names.

[0055] Figure 2 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0056] exist Figure 2In the embodiment, the first wireless device 100 and / or the second wireless device 200 may be implemented in various forms according to the usage / service. For example, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 1 At least one of {wireless devices 100a to 100f and BS200}, {wireless devices 100a to 100f and wireless devices 100a to 100f} and / or {BS200 and BS200}. The first wireless device 100 and / or the second wireless device 200 may be configured by various elements, devices / components and / or modules.

[0057] The first wireless device 100 may include at least one transceiver (eg, transceiver 106 ), at least one processing chip (eg, processing chip 101 ), and / or one or more antennas 108 .

[0058] The processing chip 101 may include at least one processor (eg, the processor 102 ) and at least one memory (eg, the memory 104 ). Additionally and / or alternatively, the memory 104 may be located outside the processing chip 101 .

[0059] The processor 102 may control the memory 104 and / or the transceiver 106, and may be adapted to implement the descriptions, functions, processes, suggestions, methods, and / or operational flow charts described in the present disclosure. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then send a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104.

[0060] The memory 104 may be operably connected to the processor 102. The memory 104 may store various types of information and / or instructions. The memory 104 may store firmware and / or software code 105 that implements codes, commands, and / or command sets that, when executed by the processor 102, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 105 may implement instructions that, when executed by the processor 102, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 105 may control the processor 102 to execute one or more protocols. For example, the firmware and / or software code 105 may control the processor 102 to execute one or more layers of a radio interface protocol.

[0061] In this document, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through 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. In the present disclosure, the first wireless device 100 may represent a communication modem / circuit / chip.

[0062] The second wireless device 200 may include at least one transceiver (eg, transceiver 206 ), at least one processing chip (eg, processing chip 201 ), and / or one or more antennas 208 .

[0063] The processing chip 201 may include at least one processor (eg, the processor 202 ) and at least one memory (eg, the memory 204 ). Additionally and / or alternatively, the memory 204 may be located outside the processing chip 201 .

[0064] The processor 202 may control the memory 204 and / or the transceiver 206, and may be adapted to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts described in the present disclosure. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then send a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 106, and then store the information obtained by processing the fourth information / signals in the memory 204.

[0065] The memory 204 may be operably connected to the processor 202. The memory 204 may store various types of information and / or instructions. The memory 204 may store firmware and / or software code 205 that implements codes, commands, and / or command sets that, when executed by the processor 202, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 205 may implement instructions that, when executed by the processor 202, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 205 may control the processor 202 to execute one or more protocols. For example, the firmware and / or software code 205 may control the processor 202 to execute one or more layers of a radio interface protocol.

[0066] In this document, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, the second wireless device 200 may represent a communication modem / circuit / chip.

[0067] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by one or more processors 102 and 202, but are not limited thereto. For example, the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). The one or more processors 102 and 202 may generate one or more protocol data units (PDUs), one or more service data units (SDUs), messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. The one or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, function, procedure, suggestion, method, and / or operational flowchart disclosed in the present disclosure, and provide the generated signal to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from the one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, function, procedure, suggestion, method, and / or operational flowchart disclosed in the present disclosure.

[0068] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors or microcomputers. The one or more processors 102 and 202 may be implemented by hardware, firmware, software or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs) or one or more field programmable gate arrays (FPGAs) may be included in the one or more processors 102 and 202. For example, the one or more processors 102 and 202 may be configured by a collection of a communication control processor, an application processor (AP), an electronic control unit (ECU), a central processing unit (CPU), a graphics processing unit (GPU) and a memory control processor.

[0069] The one or more memories 104, 204 may be associated with the one or more processors 102, 202 and may store various forms of data, signals, messages, information, programs, codes, instructions and / or commands. The one or more memories 104, 204 may include random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), erasable programmable ROM (EPROM), flash memory, volatile memory, non-volatile memory, hard drive, register, cache memory, computer-readable storage medium and / or a combination thereof. The one or more memories 104, 204 may be located inside and / or outside the one or more processors 102, 202. In addition, the one or more memories 104, 204 may be connected to the one or more processors 102, 202 via various technologies such as wired or wireless connections.

[0070] The one or more transceivers 106, 206 may send user data, control information, wireless signals / channels, etc. mentioned in the description, features, processes, suggestions, methods, and / or operation flow charts disclosed herein to one or more other devices. The one or more transceivers 106, 206 may receive user data, control information, wireless signals / channels, etc. mentioned in the description, features, processes, suggestions, methods, and / or operation flow charts disclosed herein from one or more other devices. For example, the one or more transceivers 106, 206 may be associated with the one or more processors 102, 202 and may send and receive wireless signals. For example, the one or more processors 102, 202 may control the one or more transceivers 106, 206 to send user data, control information, wireless signals, etc. to one or more other devices. In addition, the one or more processors 102, 202 may control the one or more transceivers 106, 206 to receive user data, control information, wireless signals, etc. from one or more other devices.

[0071] The one or more transceivers 106, 206 may be associated with one or more antennas 108, 208. Additionally and / or alternatively, the one or more transceivers 106, 206 may include one or more antennas 108, 208. The one or more transceivers 106, 206 may be configured to send and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, features, processes, suggestions, methods, and / or operational flow charts disclosed herein via the one or more antennas 108, 208. As used herein, the one or more antennas 108, 208 may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0072] The one or more transceivers 106, 206 may convert received user data, control information, radio signals / channels, etc. from RF band signals to baseband signals so as to process the received user data, control information, radio signals / channels, etc. using the one or more processors 102, 202. The one or more transceivers 106, 206 may convert the processed user data, control information, radio signals / channels, etc. from baseband signals to RF band signals using the one or more processors 102, 202. To this end, the one or more transceivers 106, 206 may include (analog) oscillators and / or filters. For example, the one or more transceivers 106, 206 may up-convert an OFDM baseband signal into an OFDM signal via an (analog) oscillator and / or a filter under the control of the one or more processors 102, 202, and transmit the up-converted OFDM signal at a carrier frequency. The one or more transceivers 106 , 206 may receive an OFDM signal at a carrier frequency and, under the control of the one or more processors 102 , 202 , down-convert the OFDM signal via an (analog) oscillator and / or a filter to an OFDM baseband signal.

[0073] although Figure 2 1 , the wireless devices 100 and 200 may further include additional components. The additional components 140 may be configured differently depending on the type of the wireless devices 100 and 200. For example, the additional components 140 may include at least one of a power supply 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. The additional components 140 may be coupled to the one or more processors 102 and 202 via various technologies such as a wired or wireless connection.

[0074] In an implementation of the present disclosure, a UE may operate as a transmitting device in an uplink (UL) and as a receiving device in a downlink (DL). In an implementation of the present disclosure, a BS may operate as a receiving device in an UL and as a transmitting device in a DL. Hereinafter, for convenience of description, it is mainly assumed that the first wireless device 100 acts as a UE and the second wireless device 200 acts as a BS. For example, a processor 102 connected to, installed on, or started in the first wireless device 100 may be adapted to perform UE behavior according to an implementation of the present disclosure or control a transceiver 106 to perform UE behavior according to an implementation of the present disclosure. A processor 202 connected to, installed on, or started in the second wireless device 200 may be adapted to perform BS behavior according to an implementation of the present disclosure or control a transceiver 206 to perform BS behavior according to an implementation of the present disclosure.

[0075] In this disclosure, a BS is also referred to as a Node B (NB), an eNode B (eNB), or a gNB.

[0076] Figure 3 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0077] Figure 3 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0078] Reference Figure 3 , UE 100 may correspond to Figure 2 A first wireless device 100 is provided.

[0079] UE 100 includes a processor 102 , a memory 104 , a transceiver 106 , one or more antennas 108 , a power management module 141 , a battery 142 , a display 143 , a keypad 144 , a subscriber identity module (SIM) card 145 , a speaker 146 , and a microphone 147 .

[0080] The processor 102 may be adapted to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts disclosed in the present disclosure. The processor 102 may be adapted to control one or more other components of the UE 100 to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts disclosed in the present disclosure. The layers of the radio interface protocol may be implemented in the processor 102. The processor 102 may include an ASIC, other chipsets, logic circuits and / or data processing devices. The processor 102 may be an application processor. The processor 102 may include at least one of a DSP, a CPU, a GPU, a modem (modulator and demodulator). Examples of the processor 102 can be found at MANUFACTURED BY SNAPDRAGON TM Series processors, Manufactured by EXYNOS TM Series processors, A series of processors manufactured by Made by HELIO TM Series processors, ATOM manufactured TM series processors or corresponding to the next generation processors.

[0081] The memory 104 is operatively coupled to the processor 102 and stores various information to operate the processor 102. The memory 104 may include ROM, RAM, flash memory, memory card, storage medium, and / or other storage devices. When the embodiment is implemented in software, the techniques described herein may be implemented using modules (e.g., procedures, functions, etc.) that execute the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. The modules may be stored in the memory 104 and executed by the processor 102. The memory 104 may be implemented within the processor 102 or external to the processor 102, in which case these may be communicatively coupled to the processor 102 via various means known in the art.

[0082] The transceiver 106 is operatively connected to the processor 102 and transmits and / or receives radio signals. The transceiver 106 includes a transmitter and a receiver. The transceiver 106 may include a baseband circuit to process radio frequency signals. The transceiver 106 controls one or more antennas 108 to transmit and / or receive radio signals.

[0083] The power management module 141 manages the power of the processor 102 and / or the transceiver 106. The battery 142 supplies power to the power management module 141.

[0084] The display 143 outputs a result processed by the processor 102. The keypad 144 receives an input to be used by the processor 102. The keypad 144 may be displayed on the display 143.

[0085] The SIM card 145 is an integrated circuit designed to securely store the International Mobile Subscriber Identity (IMSI) number and its associated keys used to identify and authenticate subscribers on mobile telephony devices such as mobile phones and computers. Contact information can also be stored on many SIM cards.

[0086] The speaker 146 outputs sound related results processed by the processor 102. The microphone 147 receives sound related input to be used by the processor 102.

[0087] Figure 4 An example 5G system structure is illustrated to which implementations of the present specification may be applied.

[0088] The 5G system (5GS; 5G system) structure consists of the following network functions (NFs).

[0089] -AUSF (Authentication Server Function)

[0090] -AMF (Access and Mobility Management Function)

[0091] - DN (Data Network), such as operator service, Internet access, or third-party service

[0092] -USDF (Unstructured Data Storage Function)

[0093] -NEF (Network Exposure Function)

[0094] -I-NEF (Intermediate NEF)

[0095] -NRF (Network Repository Function)

[0096] -NSSF (Network Slice Selection Function)

[0097] -PCF (Policy Control Function)

[0098] -SMF (Session Management Function)

[0099] -UDM (Unified Data Management)

[0100] -UDR (Unified Data Repository)

[0101] -UPF (User Plane Function)

[0102] -UCMF (UE Radio Capability Management Function)

[0103] -AF(Application Function)

[0104] -UE (User Equipment)

[0105] -(R)AN ((Radio) Access Network)

[0106] -5G-EIR (5G Equipment Identity Register)

[0107] -NWDAF (Network Data Analysis Function)

[0108] -CHF (billing function)

[0109] In addition, the following network functions can be considered.

[0110] -N3IWF (Non-3GPP Interworking Function)

[0111] -TNGF (Trusted Non-3GPP Gateway Function)

[0112] -W-AGF (wired access gateway function)

[0113] Figure 4 The 5G system architecture for a non-roaming case represented using reference points is shown, which shows how the various network functions interact with each other.

[0114] exist Figure 4 In the figure, for the clarity of the point-to-point diagram, UDSF, NEF and NRF are not described. However, all network functions shown can interact with UDSF, UDR, NEF and NRF as needed.

[0115] For clarity, Figure 4 The connections between the UDR and other NFs (e.g., PCF) are not shown in FIG. Figure 4 The connection between NWDAF and other NFs (eg, PCF) is not shown.

[0116] The 5G system architecture includes the following reference points.

[0117] -N1: Reference point between UE and AMF.

[0118] -N2: Reference point between (R)AN and AMF.

[0119] -N3: Reference point between (R)AN and UPF.

[0120] -N4: Reference point between SMF and UPF.

[0121] -N6: Reference point between UPF and data network.

[0122] -N9: Reference point between two UPFs.

[0123] The following reference points illustrate the interactions that exist between NF services in a NF.

[0124] -N5: Reference point between PCF and AF.

[0125] -N7: Reference point between SMF and PCF.

[0126] -N8: Reference point between UDM and AMF.

[0127] -N10: Reference point between UDM and SMF.

[0128] -N11: Reference point between AMF and SMF.

[0129] -N12: Reference point between AMF and AUSF.

[0130] -N13: Reference point between UDM and AUSF.

[0131] -N14: Reference point between two AMFs.

[0132] -N15: Reference point between the PCF and AMF in case of non-roaming scenario, and between the PCF and AMF of the visited network in case of roaming scenario.

[0133] - N16: Reference point between two SMFs (in case of roaming, between the SMF of the visited network and the SMF of the home network).

[0134] -N22: Reference point between AMF and NSSF.

[0135] In some cases, it may be necessary to connect two NFs to each other to serve the UE.

[0136] <Local Services>

[0137] Providing access to local services refers to the ability to provide access to a hosted network and a set of services provided by the hosted network provider and third-party service providers including other network operators and third-party application providers. Services can be localized (i.e., provided at a specific / limited area) and can be bounded in time. Users can become aware of available access to local services, as well as the process of obtaining and terminating access to the hosted network and local services. From a user experience perspective, the process should be efficient and convenient.

[0138] Providing access to local services creates new opportunities for users and service providers. For example, access can be provided in areas where coverage provided by other networks does not exist (e.g., at a playground far from other infrastructure establishments), or access and local services can be established on demand (in the short term) without the need for long-term business relationships, permanently installed equipment, etc.

[0139] The types of local services and access to localized services via the managed network can be promoted and arranged through different channels. It is primarily the service operator (e.g., brick and mortar businesses, entertainment venues, building contractors, first responder agencies, etc.) who will provide information and appropriate incentives or instructions to potential users so that they will seek access to local services via the managed network.

[0140] I. Requirements for local services

[0141] In the following requirements, it is assumed that:

[0142] - Both the home network and the hosted network can be either PLMN or NPN.

[0143] - Only subscribers of the public network can roam into the PLMN.

[0144] 1. Configuration of localized services in the hosting network

[0145] The 5G system should support appropriate mechanisms that allow localized service agreements to be automatically established for specific occasions (time and location) and to build temporary relationships between the hosting network operator and other service operators (including network operators or third-party application providers).

[0146] The 5G system should support a means for service operators to request, via standard mechanisms, a hosted network to provide access to third-party services during specific time periods and locations. The time periods should be flexible so that changes to service provision (e.g., canceling or extending local services at service delivery locations) can be decided at any time based on localized service agreements.

[0147] Based on the localized service agreement, the 5G system should provide appropriate means to allow service operators to request and provide various localized service requirements, including QoS, expected / maximum number of users, event information for discovery, network slicing, required IP connectivity, etc.

[0148] The 5G system should support means for the hosting network to create policies based on received requests and configure resources for the third-party service at the requested time and location.

[0149] The 5G system should support a means for the hosting network to inform the service operator of the accepted service parameters and routing policies.

[0150] Subject to regulatory requirements and localized service agreements, the 5G system should allow the home network operator to automatically negotiate policies with the hosted network to allow subscribers of the home network to connect at specific opportunities (e.g., time and location) for their home network services.

[0151] Subject to the automatic localization service agreement between the hosted network operator and the home network operator, for UEs with only a home network subscription and with authorization to access the hosted network, the 5G system shall support:

[0152] - accessing a hosted network and using home network services or selected localized services via the hosted network,

[0153] - Seamless service continuity of home network services or selected localized services when moving between two hosted networks or between a hosted network and a home network.

[0154] The 5G system shall support mechanisms to enable network configurations that provide access to localized services such that a service may be limited in its spatial extent (in terms of a particular topology, such as a single cell) (as specified by a third party).

[0155] The 5G system should support mechanisms to enable configuration of a network that provides access to localized services such that the service may be restricted in available resources or capacity to correspond to requirements that apply only to the location where the service is delivered (as specified by the service provider of the localized service).

[0156] The 5G system should support means for the hosted network to provide third-party service providers with information for automatic discovery of the hosted network by the UE to allow access to specific third-party services.

[0157] The 5G system should support security mechanisms to allow the home network to coordinate with the hosted network for a subscriber to temporarily access the hosted network (e.g., based on temporary credentials) at a given time (start time and duration) and location.

[0158] 2. Users manually select localization services via a hosted network

[0159] The hosting network shall allow the UE to manually select temporary localized services provided via local breakout at the hosting network.

[0160] Providing localized services via local breakout at a hosted network may be based on an interworking scenario of hosted network owned / cooperative services.

[0161] 3.UE configuration, provisioning, authentication and authorization

[0162] Subject to localized service agreements, the 5G system should enable the home network operator to authorize the UE to use its home network services via the hosted network during specific time periods and / or locations.

[0163] The 5G system should allow a trusted third-party service provider to provide localized service policies (e.g., QoS, network slicing in the hosted or home network, service restrictions such as time and location) to the UE via a hosted network or the UE's home network.

[0164] The 5G system should enable the UE to use credentials provided by the hosted network, with or without coordination with the UE's home network, to utilize localized services via the hosted network under specific time (including start time and duration) and location validity.

[0165] The 5G system should be able to allow the home network to steer its UEs to the hosted network taking into account the location, time, coverage of the hosted network, and the services provided by the home and hosted networks.

[0166] The 5G system should provide support for enabling secure means to authenticate and authorize users of UEs accessing a hosted network, including cases where the UE does not subscribe to the hosted network and still needs to be authorized to use localized services via the hosted network.

[0167] It may be assumed that the network provider deploying the hosted network may have access to corresponding identification information about the user, for example through a separate registration procedure outside the scope of 3GPP.

[0168] The 5G system should be able to authenticate and authorize UEs of users authenticated to the hosted network to access the hosted network and its localized services upon request by the service provider.

[0169] 4.UE discovery, selection and access

[0170] Subject to the operator's policies and agreements between the third-party service provider and the operator, the 5G system should enable the UE to receive and use configurations provided by the third-party service provider to discover and access hosted networks and localized services, including taking into account previous service agreements with the third-party service provider and the lack of previous subscription to the hosted network. If the UE is able to obtain services from both networks simultaneously, it may additionally select the hosted network. If the UE cannot maintain connection to the home network while selecting a hosted network, the selection should only be done at the user's request (i.e., using manual selection).

[0171] The 5G system shall support a secure means for UEs to select and access localized services that may be provided by a third-party service provider via a hosted network, independent of prior subscription to the hosted network or the third-party service provider.

[0172] The 5G system should enable the home network to allow the UE to automatically select a hosted network for accessing localized services when specified conditions (e.g., predefined time, location) are met.

[0173] If the authorization for the localized service is no longer valid (which may be based on certain conditions such as the time or location of the user, for example), the 5G system should be able to prevent the UE from re-accessing the hosted network after the localized service has terminated.

[0174] The 5G system may support a means for a UE, either previously subscribed or not subscribed to a hosted network, to display human-readable information about how to obtain access to the hosted network and available third-party services.

[0175] The 5G system should support a mechanism that allows the user to manually select a specific local hosted network.

[0176] Additional information may be presented to the user to facilitate manual network selection.

[0177] The 5G system should be able to restrict access of specific UEs to configurable areas of the coverage area of ​​the hosting network.

[0178] The 5G system should be able to maintain the user's privacy with respect to the hosted network when the UE is not utilizing the hosted network, for example, to prevent the hosted network from tracking the UE.

[0179] The 5G system should enable the home network to instruct the UE to select a hosted network under certain conditions (e.g., predefined time, location) based on a request from the service provider.

[0180] The 5G system should enable the home network to allow the UE to select a hosted network or change to another hosted network without any additional user intervention, as long as the delivered services (both localized services and home routing services) remain unchanged.

[0181] 5. Managed network localization services and attribution operator services

[0182] The 5G system will enable the home network operator to indicate to the UE which services are preferred to be used from the home network when the UE is connected to the hosted network and the requested services are available from both the hosted network and the home network.

[0183] Based on the localized service agreement, the hosted network should be able to provide the required connectivity and QoS for UEs that are simultaneously connected to the hosted network for localized services and to its home network for home network services.

[0184] If the hosted network and the home network are supported based on a localized service agreement, the UE will be able to connect to its home network via the hosted network.

[0185] 6. Return to home network

[0186] The 5G system should provide a mechanism to alleviate the user plane and control plane overload caused by a large number of UEs returning from temporary local access of a hosted network to their home network in a very short period of time.

[0187] The 5G system should provide mechanisms for minimizing the impact on UE communications, for example, to prevent user and control plane disruption when a UE returns to its home network with a large number of other UEs within a very short period of time after terminating its temporary local access to the hosted network.

[0188] 7. Billing

[0189] The 5G system should be able to collect charging information for the use of localized services at the hosted network and provide charging records to the UE's home operator based on the localized service agreement and charging policy provided by the service provider of the localized service.

[0190] 8. Regulatory Services

[0191] A managed network using a 5G system should be able to support regulated services (e.g., PWS, LI, and emergency calls) based on regional / national regulatory requirements.

[0192] 9. Multicast / Broadcast

[0193] The operator of the hosting network should support a mechanism that allows different service providers of localized services to disseminate their services and content via broadcast / multicast transmissions. The mechanism should also provide a means to include different content in the same transmission, such as including advertisements with other content, or including multiple content in the same media delivered to the user.

[0194] The hosting network shall provide multicast and broadcast services to UEs receiving the services in an energy-efficient manner.

[0195] The managed network should support resource efficient content delivery via multicast / broadcast.

[0196] The hosting network should support mechanisms that provide low-latency signaling for efficient content delivery to many UEs.

[0197] Subject to the home operator's policies, the hosted network should be able to prioritize specific multicast and broadcast services for local access over home routed access, even if the same services are available in both networks.

[0198] II. Support return to home network

[0199] When the local service ends, a large number of UEs will try to register back to their home network. This may cause signaling peaks in the home network and cause overload of the user plane and control plane, resulting in, for example, users waiting longer to re-register to / reselect their home network.

[0200] There are various load control mechanisms that have been defined, such as:

[0201] - Access control and barring;

[0202] -Control plane load control, congestion and overload control;

[0203] -Prevent signaling overload associated with disaster conditions and disaster roaming services.

[0204] This key question aims to investigate whether the existing mechanisms for overload control in the network can support all the requirements in Part I and whether any enhancements or additional mechanisms need to be defined. The following aspects will be considered:

[0205] - How to alleviate the user plane and control plane overload caused by a large number of UEs returning from temporary local access of a hosted network to their home network within a very short period of time.

[0206] - How to minimize the impact on the UE's communications, for example to prevent user and control plane disruption when it returns to the home network with a large number of other UEs within a very short period of time after terminating its temporary local access to the hosted network.

[0207] <Disclosure of this specification>

[0208] This paper proposes the following approach to solve this problem. The approaches given below can be used in combination or complementary. The following suggestions assume that the redirection is performed during the registration process, but can work similarly during the service request process.

[0209] This section describes the case where the UE uses temporary credentials to access a hosted network. In this case, the AMF may not know the UE's home network. This can be easily resolved if the UE is able to indicate the UE's home network ID.

[0210] Option 1: The UE may provide the home network information to the AMF by indicating the home network ID during registration with the hosted network.

[0211] Alternatively, the UE may send the home network information together with the previous serving network information (if it is roaming).

[0212] Alternatively, the UE may provide the home network information implicitly. For example, according to the current registration process, the UE may be required to provide the network with the latest valid 5G-GUTI (using NID in the case of SNPN allocation). Since the 5G-GUTI includes the PLMN ID, the AMF can know the UE's home network.

[0213] As shown in Table 3, there may be four scenarios.

[0214] [Table 3]

[0215] Home Network Hosted Network applicability Scenario A PLMN PNI-NPN O Scenario B PLMN SNP X Scenario C SNP PNI-NPN X Scenario D SNP SNP O

[0216] The UE may include a 5G-GUTI as follows. When the UE is performing an initial registration or a disaster roaming registration, the UE may indicate its UE identity in the Registration Request message as follows, listed in descending order of priority in the case of registration with a PLMN:

[0217] i) If the UE has a valid EPS GUTI, the 5G-GUTI mapped from the EPS GUTI.

[0218] ii) the native 5G-GUTI assigned by the PLMN the UE is attempting to register to (if available);

[0219] iii) the native 5G-GUTI assigned by the equivalent PLMN to the PLMN the UE is attempting to register to (if available);

[0220] iv) Native 5G-GUTI assigned by any other PLMN (if available).

[0221] This could also be a 5G-GUTI assigned via another access type.

[0222] v) Otherwise, the UE may need to include its SUCI in the Registration Request.

[0223] If the UE is registering with the SNPN, the UE may need to indicate its UE Identity in the Registration Request message when the UE is performing an initial registration, as follows, listed in descending order of priority:

[0224] i) the native 5G-GUTI assigned by the same SNPN to which the UE is attempting to register (if available);

[0225] ii) the native 5G-GUTI assigned by any other SNPN and the NID of the SNPN that assigned that 5G-GUTI (if available);

[0226] iii) Otherwise, the UE includes its SUCI in the Registration Request as defined in TS 33.501

[15] .

[0227] For scenarios A and D, the UE will provide its latest 5G-GUTI, so there may be no problem. However, for scenarios B and C, the UE may not provide a 5G-GUTI because the types of the home network and the hosted network are different. According to the current behavior, when the UE is registered to a PLMN, the UE can only include a 5G-GUTI assigned by any PLMN. Similarly, when the UE is registered to a SNPN, the UE can only include a 5G-GUTI assigned by any SNPN. If the UE provides a 5G-GUTI regardless of whether the 5G-GUTI is received from a PLMN or a SNPN, the hosted network can learn the UE's home network.

[0228] Option 2: The UE may provide the latest valid 5G-GUTI to the AMF during registration to the hosted network.

[0229] For option 1, there may be an impact on NAS registration messages. However, for option 2, there may be no impact on NAS messages. Therefore, we recommend using option 2.

[0230] The device may send valid 5G-GUTI information in the 5GS Mobile Identity IE or in an additional GUTI IE.

[0231] Option 3: If the device sends SUCI by sending a registration request, the AMF may verify that the device's SUCI contains the home network information. For example, if the device is authenticated using the Credential Holder (CH) architecture, the SUCI sent by the device may contain the device's home network information. However, if the device uses temporary credentials to access a hosted network, the device may generate a SUCI based on the temporary credentials and provide it to the hosted network. This may not contain the device's home network information. In this case, the AMF may send a regular identification request to the device to request the device's SUCI information. The device may then send the AMF the SUCI information of its home network. Based on this, the AMF may determine the device's home network information. Alternatively, if the device sends temporary credentials, the device may include the SUCI information of the home network in an additional GUTI IE and send it to the AMF. The AMF may use the home network identification information in the SUCI to determine the device's home network.

[0232] The hosting network AMF can determine the UE's home network.

[0233] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of the present disclosure are not limited to the specific names used in the figures.

[0234] Figure 5 The process according to the embodiment of the present specification is illustrated.

[0235] Multiple UEs may be deregistered sequentially by the hosting network.

[0236] The method may be about supporting return to the home network. If a large number of UEs return to the home network once the localized service is terminated, congestion in the home network may be inevitable. The method proposes to control the number of returning UEs based on a service level agreement between the home network and the hosted network.

[0237] This approach assumes the following:

[0238] - There is a service level agreement between the home network and the hosted network.

[0239] - The hosting network configures the AMF with the maximum number of UEs returned in a given time unit for each home network, for example, 10 UEs per second for PLMN A. That is, the AMF can deregister UEs in a distributed manner.

[0240] The home network operator can determine the maximum number of UEs that can be returned. Taking into account the network processing capacity, the hosted network can be informed through a service level agreement.

[0241] That is, the AMF may be configured with the maximum number of UEs returned for all networks (PLMN and / or NPN) that have a service agreement with the hosted network. If the terminal is roaming, it is assumed that there is a service agreement between the serving network and the hosted network.

[0242] -The AMF of the hosting network can be informed of the end time of the localized service.

[0243] When a localized service is terminated, the AMF of the hosting network may trigger a deregistration process.

[0244] The AMF may check the maximum number of UEs returned for each network. When the AMF deregisters the UE, the UE may return to the home network. There may be multiple home networks for UEs receiving local services. The home network may have a maximum number of UEs returned per unit time. That is, if the maximum number of UEs returned to the home network per unit time is exceeded, an overload may occur. The maximum number of UEs returned for each home network may be configured in the AMF (for example, 10 per second). Therefore, the AMF may deregister the UE receiving local services by considering the maximum number of UEs returned for multiple home networks.

[0245] The AMF may sequentially trigger deregistration for the selected UEs. The AMF may ensure that the number of UEs returning to each home network during a given time unit does not exceed a configured maximum number.

[0246] If multiple UEs trigger deregistration without waiting for network initiated deregistration, the AMF may not be able to control the number of returning UEs. In order for the AMF to trigger deregistrations in a time sequence, the service termination time provided to the UE may be later than the actual service termination time. The time interval may be determined by considering the expected number of returning UEs and the maximum number of returning UEs within a given time unit for the home network.

[0247] The method by which the AMF enforces the maximum number of returned UEs may vary depending on the implementation.

[0248] 1. Information about the maximum number of returning UEs during a given time unit for each home network may be configured in the AMF.

[0249] 2. The UE may register with the hosting network for localized services. The AMF may store information about the UE's home network.

[0250] The UE may enable a mode for hosted network selection (eg, SNPN access mode, localized service access mode, etc.) for hosted network selection. This allows the UE to search and register in a hosted network other than the home network.

[0251] When the UE registers in a hosted network, the UE may include a valid 5G-GUTI (and optionally, if assigned to a SNPN, the NID) in the registration request, regardless of whether the 5G-GUTI is received from a PLMN or SNPN. Based on the received 5G-GUTI (and optionally the NID), the AMF may learn the UE's home network.

[0252] The UE may provide information about its previous serving network to the hosted network AMF during the registration process to inform it of its previous serving network. The UE may provide explicit information about its previous serving network to the hosted network AMF. Alternatively, the hosted network AMF may infer the previous serving network based on the GUTI information of the previous serving network provided by the UE. The hosted network AMF may store the information of the previous serving network of the terminal in the context of the terminal, and the information may be transmitted to the UE context during the AMF change process.

[0253] The above context transfer can be used to support roaming. Since the HPLMN is different from the network to which the terminal will return when the terminal roams, if the AMF has no information about the serving network, the AMF can determine that the terminal is returning to the HPLMN. If the terminal is a terminal subscribed to an SNPN, the HPLMN can be interpreted as the home SNPN.

[0254] In another way, the information about the maximum number of UEs returned per given unit time may not be preconfigured in the AMF, and the corresponding value may be stored in the subscriber information of the UDM, and the AMF may obtain the information (the maximum number of UEs returned per given unit time) by retrieving the subscriber information in the terminal registration process. If the preconfiguration method and the method based on UDM user information are used together, the AMF may give priority to the information in the UDM, and if there is no information in the UDM, the preconfigured value is used.

[0255] If the terminal moves to a managed network while roaming, the terminal can provide the AMF with a value received from the serving network instead of the home network as a valid 5G-GUTI. In this case, the AMF can deregister based on the configuration information of the serving network. The terminal can also send the information of the home network while sending the 5G-GUTI to the AMF. In addition, even if the terminal does not provide the home network information, the AMF can distinguish the home network of the terminal based on the subscriber information. And the deregistration can be performed based on the smaller value by comparing the maximum number of returning UEs of the home network and the maximum number of returning UEs of the terminal's previous serving network.

[0256] In addition, when temporary credentials are used when accessing a hosted network, the terminal may send to the AMF (via the 5GS Mobile Identity IE) a SUCI generated based on the temporary credentials. In addition, the terminal may generate valid 5G-GUTI information or SUCI based on the home network of the terminal in the additional GUTI IE and send it to the AMF. Based on the information in the additional GUTI IE sent by the terminal, the AMF may learn the home network of the terminal (the previous service network in the case of roaming).

[0257] 3. After the localized service is terminated, the AMF may trigger deregistration in an order such that the number of returning UEs does not exceed the configured maximum number of returning UEs.

[0258] When multiple UEs receive localized services from a hosted network, after the localized services are terminated, the hosted network AMF may check whether the number of multiple UEs exceeds the maximum number of returned UEs. If the number of multiple UEs exceeds the maximum number of returned UEs, the AMF may trigger deregistration in sequence so that the number of returned UEs does not exceed the set maximum number of returned UEs.

[0259] That is, when AMF triggers the deregistration of UE after the localized service is terminated, AMF can use an adaptive distributed method to send deregistration requests to a certain proportion of terminals. This method can limit the signaling burden of both the hosting network (source network) and the target network (home network).

[0260] The above-mentioned distributed method may refer to a method in which the AMF divides multiple UEs into groups according to a certain ratio and sends a deregistration request to each group at different times. For example, the method is as follows.

[0261] i) AMF may select a number of UEs not exceeding the maximum number of returning UEs from among multiple UEs. AMF may send a deregistration request to the selected UEs.

[0262] ii) After a certain period of time, the AMF may select the number of UEs (which does not exceed the maximum number of returned UEs) among the non-selected UEs.

[0263] The above operations i) and ii) are performed in two parts, and the number of distributed groups is 2. However, depending on the number of UEs receiving the localized service, the number of distributed groups may be 3, 4 or more.

[0264] The AMF may include information that the localized service has been terminated in the deregistration request message. The UE may return to the home network. The UE may not re-register with the hosted network based on the instruction received from the AMF.

[0265] When the terminal receives information from the AMF that the localized service has been terminated, the terminal may not re-register with the hosted network. To this end, the terminal may turn off the mode for hosting network selection (e.g., SNPN access mode, localized service access mode, etc.) based on the information that the localized service has been terminated, and perform network selection again. The terminal can return to the home network through this.

[0266] When the AMF enforces the maximum number of returned UEs, the AMF may also consider deregistered UEs initiated by the UE. For example, when the UE sends a deregistration request to the AMF, the AMF may consider the UE requesting deregistration when selecting the UE to be deregistered considering the maximum number of returned UEs.

[0267] When the AMF notifies the terminal through a deregistration request message that the localized service has been terminated, the terminal can complete the deregistration process and return to the home network.

[0268] The maximum number of returning UEs during a given time unit for each home network may be set in the AMF. The AMF may trigger deregistration in a sequential manner such that the number of returning UEs does not exceed the configured maximum number.

[0269] The AMF may indicate in the deregistration request message sent to the terminal that the localization service has been terminated.

[0270] Figure 6 The process of AMF according to the disclosure of this specification is shown.

[0271] The hosting network that hosts the localization service may include the AMF.

[0272] 1. The AMF may receive a first registration request from a first UE (user equipment).

[0273] 2. The AMF may send a first registration acceptance to the first UE.

[0274] 3. The AMF may send a first deregistration request to the first UE based on the termination of the localized service.

[0275] The first deregistration request may include information that the localization service is terminated.

[0276] 4. The AMF may receive a first deregistration acceptance from the first UE.

[0277] The AMF may receive, from the first UE, an ID (identification) of a home network of the first UE.

[0278] The home network may be the network that served the first UE before the hosted network.

[0279] The AMF may receive a second registration request from the second UE.

[0280] The AMF may send a second Registration Accept to the second UE.

[0281] The home network of the first UE may be the home network of the second UE.

[0282] The AMF may send a second deregistration request to the second UE based on that the localized service is terminated.

[0283] The second deregistration request may include information that the localization service is terminated.

[0284] The second logout request may be sent at a different time than the first logout request.

[0285] The AMF may receive a second deregistration accept from the second UE.

[0286] The different time from the first deregistration request may be a time to prevent overloading of the home network.

[0287] Figure 7 A process of a first UE according to the disclosure of this specification is shown.

[0288] 1. The first UE may send a first registration request to the AMF (Access and Mobility Management Function).

[0289] The hosting network that hosts the localization service may include the AMF.

[0290] 2. The first UE may receive a first registration acceptance from the AMF.

[0291] 3. The first UE may receive a first deregistration request from the AMF based on the localized service being terminated.

[0292] The first deregistration request may include information that the localization service is terminated.

[0293] 4. The first UE may send a first deregistration acceptance to the AMF.

[0294] The first UE may send the ID (identification) of the home network of the first UE to the AMF.

[0295] The home network may be the network that served the first UE before the hosted network.

[0296] The home network of the first UE may be the home network of the second UE.

[0297] Based on the AMF sending a second deregistration request to the second UE, the second deregistration request can be sent at a different time than the first deregistration request.

[0298] The different time from the first deregistration request may be a time to prevent overloading of the home network.

[0299] Hereinafter, an apparatus for performing communication according to some embodiments of the present specification will be described.

[0300] For example, the device may include a processor, a transceiver, and a memory.

[0301] For example, the processor may be configured to be operably coupled to a memory and a processor.

[0302] The processor can execute: wherein the hosted network hosting the localized service includes an AMF, receiving a first registration request from a first UE (user equipment); sending a first registration acceptance to the first UE; based on the localized service being terminated, sending a first deregistration request to the first UE, wherein the first deregistration request includes information that the localized service is terminated; and receiving a first deregistration acceptance from the first UE.

[0303] Hereinafter, a processor for providing communication according to some embodiments of the present specification will be described.

[0304] The processor is configured to: send a first registration request to AMF (Access and Mobility Management Function); wherein the hosted network hosting the localized service includes AMF; receive a first registration acceptance from the AMF; based on the localized service being terminated, receive a first deregistration request from the AMF; wherein the first deregistration request includes information that the localized service is terminated; and send a first deregistration acceptance to the AMF.

[0305] Hereinafter, a non-transitory computer-readable medium storing one or more instructions for providing a multicast service in wireless communication according to some embodiments of the present specification will be described.

[0306] According to some embodiments of the present disclosure, the technical features of the present disclosure may be directly implemented as hardware, software executed by a processor, or a combination of the two. For example, in wireless communications, the method performed by the wireless device may be implemented in hardware, software, firmware, or any combination thereof. For example, the software may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or other storage medium.

[0307] Some examples of storage media are coupled to a processor so that the processor can read information from the storage media. Alternatively, the storage medium can be integrated into the processor. The processor and the storage medium can reside in an ASIC. For another example, the processor and the storage medium can reside as separate components.

[0308] Computer readable media may include tangible and non-volatile computer readable storage media.

[0309] For example, the non-volatile computer readable medium may include a random access memory (RAM), such as a synchronous dynamic random access memory (SDRAM), a read-only memory (ROM), or a non-volatile random access memory (NVRAM). Read-only memory (EEPROM), flash memory, magnetic or optical data storage media, or other media that can be used to store instructions or data structures, or the non-volatile computer readable medium may also include a combination of the above.

[0310] Furthermore, the methods described herein may be implemented at least in part by a computer-readable communication medium that carries or carries code in the form of instructions or data structures and that can be accessed, read, and / or executed by a computer.

[0311] According to some embodiments of the present disclosure, a non-transitory computer-readable medium has one or more instructions stored thereon. The one or more stored instructions may be executed by a processor of a base station.

[0312] The stored one or more instructions cause the processor to: send a first registration request to an AMF (Access and Mobility Management Function); wherein the hosted network hosting the localized service includes the AMF; receive a first registration acceptance from the AMF; based on the localized service being terminated, receive a first deregistration request from the AMF, wherein the first deregistration request includes information that the localized service is terminated; and send a first deregistration acceptance to the AMF.

[0313] This description can have various effects.

[0314] For example, after the local service is terminated, the terminal may be deregistered and the terminal may be notified that the local service has been terminated, thereby preventing the terminal from attempting to re-register with the network hosting the local service.

[0315] For example, after local services are terminated, congestion caused by a large number of terminals in the home network can be prevented by preventing the terminals from returning from the hosted network to the home network all at once.

[0316] The effects that can be obtained through the specific examples of this specification are not limited to the effects listed above. For example, there may be various technical effects that can be understood or derived from this specification by ordinary technicians in the relevant field. Therefore, the specific effects of this specification are not limited to those effects explicitly described herein, and may include various effects that can be understood or derived from the technical characteristics of this specification.

[0317] The claims described herein may be combined in various ways. For example, the technical features of the method claims of this specification may be combined and implemented as a device, and the technical features of the device claims of this specification may be combined and implemented as a method. In addition, the technical features of the method claims of this specification and the technical features of the device claims may be combined and implemented as a device, and the technical features of the method claims of this specification and the technical features of the device claims may be combined and implemented as a method. Other embodiments are within the scope of the appended claims.

Claims

1. A method for performing communication, the method being performed by an access and mobility management function AMF, the method The following steps are involved: The hosting network for hosting localized services includes the AMF, receiving a first registration request from a first user equipment UE; Sending a first registration acceptance to the first UE; Based on the localized service being terminated, sending a first deregistration request to the first UE; The first deregistration request includes information that the localization service is terminated. A first deregistration accept is received from the first UE.

2. The method according to claim 1, further comprising the steps of: receiving, from the first UE, an identification ID of a home network of the first UE, The home network is a network that serves the first UE before the hosted network.

3. The method according to claim 1 or 2, further comprising the following steps: receiving a second registration request from a second UE; sending a second registration accept to the second UE; The home network of the first UE is the home network of the second UE, Based on the localized service being terminated, sending a second deregistration request to the second UE; The second deregistration request includes information that the localization service is terminated. wherein the second deregistration request is sent at a different time than the first deregistration request; A second deregistration accept is received from the second UE.

4. The method according to claim 3, wherein: The time different from the first deregistration request is a time to prevent overloading of the home network.

5. An access and mobility management function AMF for performing communications, the AMF comprising: Transceiver; as well as processor, The processor performs operations including the method according to any one of claims 1 to 4.

6. The AMF according to claim 5, wherein: The operations include: receiving, from the first UE, an identification ID of a home network of the first UE, The home network is a network that serves the first UE before the hosted network.

7. The AMF according to claim 5 or 6, wherein the operation further comprises: receiving a second registration request from a second UE; sending a second registration accept to the second UE; The home network of the first UE is the home network of the second UE, Based on the localized service being terminated, sending a second deregistration request to the second UE; The second deregistration request includes information that the localization service is terminated. wherein the second deregistration request is sent at a different time than the first deregistration request; A second deregistration accept is received from the second UE.

8. The AMF according to claim 7, wherein: The time different from the first deregistration request is a time to prevent overloading of the home network.

9. A method for performing communication, the method being performed by a first user equipment UE, the method comprising the following steps: Sending a first registration request to the access and mobility management function AMF; The hosting network for hosting localized services includes the AMF, receiving a first registration acceptance from the AMF; Based on the localized service being terminated, receiving a first deregistration request from the AMF; The first deregistration request includes information that the localization service is terminated. Send a first deregistration acceptance to the AMF.

10. The method according to claim 9, further comprising the steps of: sending an identification ID of the home network of the first UE to the AMF, The home network is a network that serves the first UE before the hosted network.

11. The method according to claim 9 or 10, in, The home network of the first UE is the home network of the second UE, Among them, based on the AMF sending a second deregistration request to the second UE, the second deregistration request is sent at a time different from that of the first deregistration request.

12. The method according to claim 11, wherein: The time different from the first deregistration request is a time to prevent overloading of the home network.

13. A first user equipment UE performing communication, the first UE comprising: Transceiver; as well as processor, The processor performs operations including the method according to any one of claims 9 to 12.

14. A first device in mobile communication, the first device comprising: at least one processor; as well as At least one memory storing instructions and being operably connected to the at least one processor to perform operations including the method according to any one of claims 9 to 12.

15. A non-volatile computer-readable storage medium having recorded instructions, in, The instructions are executed by one or more processors so that the one or more processors perform operations including the method according to any one of claims 9 to 12.

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