Method and apparatus for selecting independent non-public network for localized service in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system according to an embodiment of the present disclosure comprises the steps of: receiving, from a network entity, SoR information of roaming; selecting a first hosted network when an indicator indicating a connection to the hosted network is included in the SoR information; and transmitting a registration request message to the selected first hosted network, in which the first hosted network is selected based on at least one of slice information and domain name network name (DNN) information on the at least one hosted network included in the SoR information.

Description

Technical Field

[0001] The present technology relates to a method and device for selecting a standalone non-public network (SNPN) for localized services in a wireless communication system. Background Art

[0002] 5G mobile communications technology defines wide frequency bands, enabling high transmission rates and new services. 5G mobile communications technology can be implemented not only in frequency bands "below 6 GHz," such as 3.5 GHz, but also in frequency bands "above 6 GHz," known as mmWave, including 28 GHz and 39 GHz. Furthermore, to achieve transmission rates fifty times faster than 5G mobile communications technology and ultra-low latency one-tenth that of 5G mobile communications technology, 6G mobile communications technology (referred to as "beyond 5G systems") is being considered in terahertz bands (e.g., the 95 GHz to 3 THz band).

[0003] In the early stages of 5G mobile communication technology development, in order to support services associated with enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC) and meet the performance requirements associated therewith, standardization is underway on the following: beamforming and massive MIMO for mitigating radio wave path loss and increasing radio wave transmission range in mmWave, supporting parameter sets (numerology, for example, operating multiple subcarrier spacings) for efficient utilization of mmWave resources and dynamic operation of time slot formats, initial access technology supporting multi-beam transmission and broadband, definition and operation of BWP (bandwidth part), new channel coding methods such as LDPC (low-density parity check) codes for large data transmission and polar codes for highly reliable transmission of control information, L2 preprocessing, and network slicing for providing specialized networks tailored to specific services.

[0004] Currently, in view of the services to be supported by 5G mobile communication technologies, discussions are underway on improvements and performance enhancements to initial 5G mobile communication technologies, and there is already physical layer standardization on technologies such as V2X (Vehicle-to-Everything) for assisting driving determination of autonomous vehicles based on information about the location and status of vehicles transmitted by vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) for system operation in unlicensed frequency bands that complies with various regulatory requirements, NR UE power saving, Non-Terrestrial Network (NTN) as UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0005] Furthermore, in terms of air interface architecture / protocols, standardization is underway on technologies such as the Industrial Internet of Things (IIoT) to support new services through interoperability and integration with other industries, Integrated Access and Backhaul (IAB) to provide nodes for network service area expansion by integrating wireless backhaul and access links, mobility enhancements including conditional handover and Dual Active Protocol Stack (DAPS) handover, and two-step random access (NR two-step RACH) to simplify the random access procedure. In terms of system architecture / services, standardization is also underway on a 5G baseline architecture (e.g., a service-based architecture or service-based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on the UE's location.

[0006] As 5G mobile communication systems are commercialized, the exponential growth of connected devices will be connected to the communication network, and it is expected that enhanced functionality and performance of 5G mobile communication systems and the integrated operation of connected devices will become necessary. To this end, new research is being planned related to: eXtended Reality (XR) for efficient support of AR (augmented reality), VR (virtual reality), MR (mixed reality), etc.; 5G performance improvements and complexity reduction through the use of artificial intelligence (AI) and machine learning (ML); support for AI services; support for metaverse services; and drone communications.

[0007] Furthermore, such advancements in 5G mobile communication systems will serve not only as a foundation for the development of new waveforms, multi-antenna transmission technologies (such as Full Dimensional MIMO (FD-MIMO), array antennas, and massive antennas) for providing coverage in the terahertz band for 6G mobile communication technology, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum), and RIS (Reconfigurable Smart Surfaces), but will also serve as a foundation for the development of full-duplex technologies for improving the frequency efficiency and system networks of 6G mobile communication technology, AI-based communication technologies for achieving system optimization by leveraging satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for implementing services with a complexity level that exceeds the operational capabilities of UEs by utilizing ultra-high-performance communication and computing resources.

[0008] As described above, as mobile communication systems evolve to provide various services, a method of efficiently providing such services is required. Summary of the Invention

[0009] Technical issues

[0010] The present disclosure relates to a method and apparatus for transmitting information required for a user equipment (UE) to select and operate based on a standalone non-public network (SNPN) providing localized services in a wireless communication system.

[0011] Solution

[0012] According to an embodiment of the present disclosure, a method for a UE in a wireless communication system includes: receiving guided roaming SoR information from a network entity; selecting a first hosted network when the SoR information includes an indication to connect to a hosted network, or receiving an input from a user indicating a determination to access a localized service; and sending a registration request message to the selected first hosted network. The first hosted network is selected based on at least one of domain name (DNN) information about at least one hosted network and slice information included in the SoR information.

[0013] According to an embodiment of the present disclosure, a user equipment (UE) in a wireless communication system includes a transceiver and at least one processor. The at least one processor is configured to: receive guided SoR information for roaming from a network entity; if the SoR information includes an indication to connect to a hosted network, select a first hosted network; and send a registration request message to the selected first hosted network. The first hosted network is selected based on at least one of domain name (DNN) information about the at least one hosted network and slice information included in the SoR information.

[0014] Beneficial effects

[0015] According to the present disclosure, when desiring to use a specific service from a hosted network, the UE can use the given information to select an appropriate SNPN to improve the quality of service. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a diagram illustrating local services provided by a hosted network according to an embodiment of the present invention;

[0017] Figure 2 is a flow chart illustrating an operation of receiving SoR information related to a hosting network providing localized services from a network according to an embodiment of the present invention;

[0018] Figure 3 is a flowchart illustrating a state in which a UE performs an operation of selecting a hosted network according to an embodiment of the present invention;

[0019] Figure 4 illustrates the operation of a UE according to an embodiment of the present disclosure; and

[0020] Figure 5 is a view showing the structure of a UE according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] Hereinafter, the operating principle of the present disclosure will be described below with reference to the accompanying drawings. When it is determined that the subject matter of the present invention is unclear, a detailed description of a known function or configuration may be skipped. The terms used herein are defined with consideration of the functions in the present disclosure and may be replaced with other terms based on the intention or practice of the user or operator. Therefore, these terms should be defined based on the overall disclosure.

[0022] As used herein, each of phrases such as “A / B,” “A or B,” “at least one of A and B,” “at least one of A or B,” “at least one of A, B, or C,” “at least one of A, B, and C,” and “at least one of A, B, or C” may include all possible combinations of the terms listed together in a corresponding one of these phrases. As used herein, terms such as “first” and “second” or “first” and “second” may be used to simply distinguish a corresponding component from another without limiting the components in other respects (e.g., importance or order).

[0023] As used herein, terms used to identify access nodes, terms representing network entities, terms representing messages, terms representing interfaces between network entities, and terms representing various identification information are provided as examples to facilitate description. Therefore, the present disclosure is not limited to these terms, and such terms can be replaced with other terms representing objects with equivalent technical concepts.

[0024] Hereinafter, a base station may be an entity that allocates resources to a terminal and may be at least one of a gNode B, eNode B, Node B, base station (BS), wireless access unit, base station controller, and a node on a network. A terminal may include a UE (User Equipment), an MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions. In this disclosure, downlink (DL) refers to the wireless transmission path for signals sent from a base station to a terminal, and uplink (UL) refers to the wireless transmission path for signals sent from a terminal to a base station. Although LTE or LTE-A systems may be described below as examples, the embodiments may be applied to other communication systems with similar technical backgrounds or channel patterns. For example, 5G mobile communication technology (5G, New Radio, NR), developed after LTE-A, may be included in systems to which the embodiments of this disclosure are applicable, and 5G below may be a concept that includes conventional LTE, LTE-A, and other similar services.

[0025] In addition, under the determination of those skilled in the art, the embodiment can be modified within such a range that does not significantly depart from the scope of the present invention, and such modification is applicable to other communication systems. It should be understood that the blocks in each flow chart and the combination of flow charts can be executed by computer program instructions.

[0026] Since computer program instructions can be incorporated into a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, the instructions executed by the processor of the computer or other programmable data processing device generate means for performing the functions described in conjunction with the blocks in each flowchart. Since computer program instructions can be stored in a computer-usable or computer-readable memory that can implement functions in a specified manner for a computer or other programmable data processing device, the instructions stored in the computer-usable or computer-readable memory can generate a product including instruction means for performing the functions described in conjunction with the blocks in each flowchart. Since computer program instructions can be incorporated into a computer or other programmable data processing device, when a series of operating steps are executed on the computer or other programmable data processing device, the instructions generate a process executed by the computer and operate the computer or other programmable data processing device, providing steps for performing the functions described in conjunction with the blocks in each flowchart.

[0027] Furthermore, each block may represent a module, code segment, or code portion that includes one or more executable instructions for performing the specified logical function. Furthermore, it should be noted that in some alternative embodiments, the functions mentioned in the blocks may occur in a different order. For example, two blocks shown in succession may be executed substantially simultaneously or in reverse order, depending on the corresponding functions. As used herein, the term "unit" refers to a software element or a hardware element such as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC). A unit may perform a specific function. However, a "unit" is not limited to software or hardware. A "unit" may be configured in an addressable storage medium or configured to run on one or more processors. Thus, by way of example, a "unit" includes elements such as software elements, object-oriented software elements, class elements, and task elements, processes, functions, properties, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within components and "units" may be combined into a smaller number of components and "units" or further divided into additional components and "units." Furthermore, the components and "units" may be implemented as one or more CPUs in an operating device or a secure multimedia card. According to an embodiment, the "unit" may include one or more processors.

[0028] For ease of description, terms and names defined in the 3rd Generation Partnership Project 5G and New Radio (NR) standards in current communication standards are used herein. However, the present disclosure is not limited to these terms and names and may be equally applicable to wireless communication networks conforming to other standards.

[0029] The terms used in this disclosure are described below.

[0030] A "public land mobile network (PLMN)" refers to a network deployed and operated by a mobile network operator. Each mobile network operator operates one or more PLMNs. Each PLMN can be identified by a mobile country code (MCC) and a mobile network code (MNC). PLMN information about a cell is included and broadcast in system information. During PLMN selection, cell selection, and cell reselection, the UE can consider various types of PLMNs.

[0031] The "Home PLMN (HPLMN)" refers to the PLMN with an MCC and MNC that match the MCC and MNC of the UE IMSI.

[0032] "Localized services" refer to services that are provided within a specific or restricted area and / or may be time-limited. This service may be in the form of an application (e.g., electronic games, audio / video on demand, etc.) or simply a connection (better quality of service (QoS) can be provided from the UE to the data network).

[0033] "Localized Service Provider (LSP)" means a network operator or a special service provider associated with a hosted network that acts as a localized service provider (e.g., a streaming service where the hosted network provides access to a special domain name network (DNN) for a particular streaming service).

[0034] A "hosting network" is a network that provides access to local services, typically a stand-alone non-public network (SNPN). A hosting network can be used to provide home network services to UEs. Alternatively, a hosting network is a public network integrated-NPN (PNI-NPN), different from an SNPN, that can use all or some of the functionality provided by the serving network's PLMN.

[0035] "Roaming operation" refers to the process of allowing the UE to provide information about a preferred network selected by the home network or the credential holder.

[0036] "PLMN access mode" refers to a mode in which the UE attempts to search and select a PLMN to use based on a PLMN priority list stored in the UE and register it.

[0037] Steering of roaming (SoR) is a process in which an operator (home network) allows a roaming UE to connect to a managed network. In this case, the operator can inform the UE of a list of preferred PLMNs. This process requires parameters such as the UE's current location and the UE's QoS in the roaming network so that the home network can make a SoR decision.

[0038] Figure 1 is a diagram illustrating local services provided by a hosted network according to an embodiment of the present invention.

[0039] refer to Figure 1 Hosted network C 130 , which is different from network A 110 , which is the home public land mobile network (HPLMN) of UE 140 , may provide UE 140 with access to local services.

[0040] For example, if there is an event where hosted network C 130 has good quality of service in a highly congested stadium, the UE 140 (or user) may want to use a particular service from hosted network C 130 .

[0041] Alternatively, when home network A 110 signs a service contract with hosted network C 130 to provide UEs 140 with access to specific services, some UEs 140 receiving services may be directed to the specific hosted network C 130 to access customized local services or better quality services.

[0042] For the purpose of selecting a hosting network C (130 (ie, SNPN)) providing localized services, the UE needs to be provided with information about the validity conditions (eg, time and location) of the SNPN so that it can be considered when selecting the SNPN.

[0043] In addition, in addition to starting SNPN selection when the UE is switched after recovering from insufficient coverage, when the UE begins operation in SNPN access mode, or when the user is able to initiate reselection of the SNPN, the UE's SNPN selection also requires the UE to start SNPN selection based on when and where a specific SNPN that provides the localized service desired by the user is available.

[0044] Furthermore, it is necessary to specify the operations for the home network to hand over the UE, select a specific hosted network and register it.

[0045] Therefore, the present disclosure proposes an extension of configuration information regarding UE subscription data.

[0046] For the purpose of helping the UE select and access a specific hosted network to use desired localized services, the following information may be selectively added for each SNPN / GIN of the UE subscription data stored in the UE.

[0047] 1. Time availability: Indicates the time during which a specific localized service is available, for example.

[0048] 2. Location Validity: Indicates the area where the user can connect to the SNPN that provides a specific localized service or the area where the search begins.

[0049] 3. Slice information: a list of single network slices supported by SNPN

[0050] 4.DNN information: list of DNNs supported by SNPN

[0051] Since the slice and DNN information are useful in scenarios where the UE wants to temporarily move to a hosted network over a subscribed SNPN, the UE may try to select an SNPN that provides the UE's registered NSSAI.

[0052] For the purpose of selecting a hosted network, information including the following additional list may be configured in the UE. This may be referred to as hosted network selection information.

[0053] 1. User-defined priority list of managed networks

[0054] In an embodiment, it may comprise validity conditions defined in the UE subscription data.In an embodiment, it should have higher priority than the list provided by the credential holder.

[0055] 2. Prioritized list of hosting networks provided by credential holders

[0056] In an embodiment, it may include validity conditions defined in the UE subscription data.

[0057] 3. The priority list of SNPN / GIN controlled by the current certificate holder may include additional information described in the UE subscription data.

[0058] 4. Timer information used to periodically identify validity conditions and start hosting network selection

[0059] Depending on the embodiment, a prioritized list of managed networks provided by the credential holder and a prioritized list of SNPNs / GINs controlled by the current credential holder may be alternative options.

[0060] The stored list can be used by the home network or the credential holder below in Figure 2 Update the roaming boot process described in .

[0061] In an embodiment, when the UE performs a managed network selection (i.e., when performing SNPN selection for the purpose of using localized services), the UE may take localized services into account in the mode in which the UE operates. In other words, in this mode, the UE may select an SNPN that provides localized services.

[0062] When choosing localization services, you can consider the following two scenarios.

[0063] Scenario 1: When the UE or user uses a specific localized service and selects the corresponding hosted network accordingly

[0064] Consider the case when the UE is already registered in the home network. In other words, if the UE or user expresses the intention to use localized services, the UE can periodically start to check whether the validity conditions of the SNPN or GIN in the priority list are met. In an embodiment, the timer information for periodic checks (i.e., the frequency with which the UE performs checks) can be pre-configured in the UE or can be provided to the UE by the home network (through roaming guidance).

[0065] In an embodiment, when the validity conditions are met, the UE may switch to localized service mode and initiate the selection of a hosted network to use the localized service. In an embodiment, when the UE determines to access the localized service, the user or UE may also switch to localized service mode to directly initiate the selection of a hosted network. In an embodiment, to select a specific SNPN and determine the priority between different SNPNs, the UE may consider the list for hosted network selection configured in the UE (as described above).

[0066] Scenario 2: When the home network hands over the UE to the hosted network

[0067] The home network (which can be a PLMN or SNPN) or the UE's credential holder can determine whether to handover the UE to a specific hosted network. This can occur when a subscriber to the home network wishes to use specific localized services on the hosted network. This is particularly true when the hosted network and the home network have a pre-existing contractual relationship. In one embodiment, when a user enters the range of the hosted network, the home network attempts to handover the subscribed UE to the specific network. In one embodiment, the home network can consider network congestion and load to determine whether to connect only specific UEs to the hosted network.

[0068] In an embodiment, the Guidelines of Roaming (SoR) information stored in the UDM may include the following information:

[0069] 1. A prioritized list of hosted networks (i.e., SNPNs used to provide localized services); including at least one of the following information associated with each SNPN.

[0070] a. Time validity

[0071] b. Location Validity

[0072] c. Slice information (S-NSSAI list)

[0073] d.DNN information

[0074] e. Localized service information

[0075] 2. Indication of connecting to the hosted network: This indication may trigger the UE to start identifying whether an SNPN providing localized services is available.

[0076] 3. Timer information: A timer for the UE to periodically identify validity conditions to initiate a search for a hosted network for localized services.

[0077] In addition to time and location validity criteria, the UE may also use slice and DNN information to select a specific SNPN. For example, if the UE supports the currently registered S-NSSAI or DNN, a specific SNPN may be selected to ensure that the UE can obtain the desired service from the hosted network.

[0078] Figure 2 is a flow chart illustrating an operation of receiving SoR information related to a hosted network providing a localized service from a network according to an embodiment of the present invention.

[0079] Figure 2 The operations are shown between access and mobility management function 210, unified data management 220 and SoR application function (AF) 230. SoR-AF 230 may be replaced by a third-party AF that can negotiate with the UDM and the home network.

[0080] refer to Figure 2 In step 240, the SoR-AF 230 may send a Nudm_ParameterProvisionUpdate request to the UDN 220. In other words, the SoR-AF 230 may update the UE subscription data stored in the UDM 220 with the new SoR information required to select the hosted network.

[0081] In step 245, the home network may determine to handover the UE to the hosted network.

[0082] In step 250, the UDM 220 may send a Nudm_SDM_Notification request to the AMF 210. The Nudm_SDM_Notification may include SoR information for triggering selection of a managed network. Step 255: The AMF 210 may send a NAS downlink message to the UE 220. The NAS downlink message may include the SoR information received from the UDM.

[0083] In step 260, UE 220 may determine the selection of a managed network based on the received SoR information. In other words, when the SoR information received by the UE includes a trigger for selecting a managed network, the UE may determine whether the validity condition of the SPN or GIN in the list configured for managed network selection is met. If the validity condition is met, the UE may begin searching for available networks and select the managed network with the highest priority.

[0084] In an embodiment, when the UE has received SoR information and selected a hosted network in the localized service mode, the UE may determine to select (or reselect) the hosted network again to select a higher priority network that provides localized service.

[0085] Table 1 below shows the managed network selection information in tabular form. This information is configured in the UE and can be included in the SoR information and provided through the SoR procedure. The UDM can also store this information in the UE's UDM subscription data. The information included in Table 1 is optional and can be added or omitted depending on the UE capabilities or deployment scenario.

[0086] Table 1

[0087]

[0088] The UE may use the following priority order between different SNPNs to select a network providing localized services. Alternatively, when there is no SNPN providing localized services, the UE may use a universal SNPN.

[0089] 1. SNPNs in a user-defined list of hosted networks: The UE may only consider SNPNs that meet the validity conditions.

[0090] 2. SNPNs in the priority list controlled by the certificate holder of the hosting network: The UE may only consider SNPNs that meet the validity conditions.

[0091] 3. The SNPN of the broadcast GIN present in the priority list of CH control of GIN for localized services; the UE may only consider GINs that meet the validity conditions.

[0092] 4. Subscribed SNPN

[0093] 5. Other SNPNs configured in the UE that do not provide localized services.

[0094] In an embodiment, when the UE wants to connect to a hosted network, the UE can know whether to perform a search for available networks by using the stored validity information. In other words, when the UE is in an area where none of the configured hosted networks meets the validity condition by first identifying the validity information stored in the configuration information, the UE can prevent battery consumption for searching for available networks to select a hosted network that provides localized services.

[0095] Figure 3 is a flowchart illustrating a state in which a UE performs an operation of selecting a hosted network according to an embodiment of the present invention.

[0096] Figure 3The method and timing for changing the access mode and the overall process of the method in which the UE is triggered to search for a network in a corresponding area to select a specific hosting network are shown.

[0097] In step 300, the UE may be in a PLMN access mode. Then, when the UE receives updated SoR information including an indication that the UE is connected to a hosted network, or when a user determines to access a localized service (i.e., when the UE receives an input indicating determination to access a localized service from the user), in step 310, the UE may transition to a PLMN access mode capable of performing a localized service.

[0098] Thereafter, when a timer for periodically identifying a validity condition configured in the hosted network selection information included in the SoR information expires, in step 320 , the UE may identify whether the validity condition of the hosted network configured in the UE has been satisfied.

[0099] Thereafter, if the validity condition of any SNPN or GIN present in the hosted network selection information is met, the UE may scan for available networks in step 370. When the UE selects the SNPN with the highest priority, the UE may move to the SNPN and enter the localized service mode.

[0100] In an embodiment, if the validity information is not satisfied in step 320, the UE may return to step 310 and maintain the PLMN access mode capable of localized services.

[0101] In step 330, the UE may be in the SNPN access mode. Thereafter, in step 340, when the UE receives updated SoR information including an indication indicating that the UE is connected to a hosted network, or when the user determines to access a localized service, the UE may transition to the SNPN access mode capable of the localized service.

[0102] Thereafter, when a timer for periodically identifying a validity condition configured in the hosted network selection information included in the SoR information expires, in step 350 , the UE may identify whether the validity condition of the hosted network configured in the UE has been satisfied.

[0103] Thereafter, if the validity condition of any SNPN or GIN present in the hosted network selection information is met, the UE may scan for available networks in step 370. When the UE selects the SNPN with the highest priority, the UE may move to the SNPN and enter the localized service mode.

[0104] In an embodiment, if the validity information is not satisfied in step 350, the UE may return to step 340 and maintain the PLMN access mode capable of localized services.

[0105] In an embodiment, the UE may be in a localized service mode in step 360. If the UE receives updated SoR information including an indication that the UE is connected to a hosted network (and when a higher-priority hosted network is selected), or if the UE periodically performs a check based on timer information configured in the UE and the result shows that the validity condition of a hosted network with a higher priority than the currently selected hosted network is satisfied, the UE may scan for available hosted networks in step 370. When the UE selects the SNPN with the highest priority, the UE may move to the SNPN and enter the localized service mode.

[0106] Figure 4 The operation of the UE according to an embodiment of the present disclosure is shown.

[0107] In step 410, the UE may receive guided SoR information of roaming from a network entity.

[0108] In step 420, when the SoR information includes an indication indicating connection to a hosted network, or when an input indicating determination to access a localized service is received from a user, the UE may select the first hosted network.

[0109] In step 430, the UE may send a registration request message to the selected first hosted network. In an embodiment, the first hosted network may be selected based on at least one of domain network name (DNN) information and slice information about at least one hosted network included in the SoR information.

[0110] In an embodiment, to select a first hosted network, the UE may determine whether a validity condition configured for at least one hosted network in the UE is satisfied, and when the validity condition is satisfied, scan available networks and select the first hosted network from the at least one hosted network. In an embodiment, to select the first hosted network, the UE may determine whether a validity condition configured for the hosted network in the UE is satisfied, and when a timer for identifying the validity condition expires, determine whether the validity condition configured for the hosted network in the UE is satisfied. In an embodiment, information related to the timer may be included in the SoR information or preset in the UE.

[0111] In an embodiment, the first hosted network may be selected based on a credential holder controlled priority list of standalone non-public networks (SNPNs) / group identities for network selection (GINs) included in the SoR information.

[0112] In an embodiment, the first hosted network may be selected based on at least one list with preset priority. The at least one list may include at least one of a user-defined list of independent non-public networks (SNPNs) in a user-defined list of the hosted network, a priority list controlled by a certificate holder of the hosted network, a priority list controlled by a certificate holder of a network selection group identity (GIN) for localized services, a list of subscribed SNPNs, and a list of other SNPNs configured in the UE that do not provide localized services.

[0113] In an embodiment, the UE may be in one of a public land mobile network (PLMN) mode, a standalone non-public network (SNPN) mode, and a localized service mode. In an embodiment, the UE may be in the public land mobile network (PLMN) mode, and the network entity is one of a steering of a roaming-application function (SoR-AF), a third-party application function (AF), and a unified data management (UDM) included in a home network. In an embodiment, when the UE is in the localized service mode, the first hosted network may have a higher priority than the hosted network to which the UE is currently connected.

[0114] Figure 5 is a view showing the structure of a UE according to an embodiment of the present disclosure.

[0115] exist Figure 5 In the embodiment, the UE may include a transceiver 500, a memory 510 and a processor 520. Figure 5 The processor 520, transceiver 500 and memory 510 of the UE can be combined according to Figures 1 to 4 The above method is used to operate. However, the components of the UE are not limited thereto. For example, the UE may include more or fewer components than the above components. The processor 520, the transceiver 500, and the memory 510 may be implemented in the form of at least one chip.

[0116] The transceiver 500 collectively refers to a receiver and a transmitter, and can transmit and receive signals to and from a UE or another network entity. The transmitted / received signals may include at least one of control information and data. To this end, the transceiver 500 may include an RF transmitter for up-converting and amplifying transmitted signals, and an RF receiver for low-noise amplifying and down-converting received signals. This is merely an embodiment of the transceiver 500, and the components of the transceiver 500 are not limited to an RF transmitter and an RF receiver. Furthermore, the transceiver 500 can receive signals using a communication scheme defined in the 3GPP standard, output the signals to the processor 520, and transmit the signals output from the processor 520. Furthermore, the transceiver 500 can receive signals and output them to the processor 520, and transmit the signals output from the processor 520 to another network entity via a network.

[0117] The memory 510 can store Figures 1 to 4 The memory 510 may store control information and / or data included in signals obtained by the UE. The memory 510 may include a storage medium such as ROM, RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media.

[0118] The processor 520 can control a series of processes so that the UE can Figures 1 to 4 The processor 520 may include at least one processor.

[0119] The at least one processor may receive roaming guided SoR information from a network entity.

[0120] When the SoR information includes an indication to connect to a hosted network, or when an input indicating a determination to access the localized service is received from a user, the at least one processor may select the first hosted network.

[0121] The at least one processor may send a registration request message to the selected first hosted network. In an embodiment, the first hosted network may be selected based on at least one of domain network name (DNN) information and slice information about the at least one hosted network included in the SoR information.

[0122] In an embodiment, at least one processor may determine whether a validity condition configured for at least one hosted network in the UE is satisfied, and when the validity condition is satisfied, scan available networks and select a first hosted network from the at least one hosted network. In an embodiment, at least one processor may determine whether a validity condition for the hosted network is configured for the hosted network in the UE, and when a timer for identifying the validity condition expires, determine whether the validity condition configured for the hosted network in the UE is satisfied. In an embodiment, information related to the timer may be included in the SoR information or preset in the UE.

[0123] In an embodiment, the first hosted network may be selected based on a credential holder controlled priority list of Standalone Non-Public Network (SNPN) / Network Selection Group Identity (GIN) included in the SoR information.

[0124] In an embodiment, the first hosted network may be selected based on at least one list according to a preset priority. The at least one list may include at least one of a user-defined list of independent non-public networks (SNPNs) in a user-defined list of the hosted network, a priority list controlled by a certificate holder of the hosted network, a priority list controlled by a certificate holder of a network selection group identity (GIN) for localized services, a list of subscribed SNPNs, and a list of other SNPNs configured in the UE that do not provide localized services.

[0125] In an embodiment, the UE may be in one of a public land mobile network (PLMN) mode, a standalone non-public network (SNPN) mode, and a localized service mode. In an embodiment, the UE may be in the public land mobile network (PLMN) mode, and the network entity is one of a Steering Application Function for Roaming (SoR-AF), a Third Party Application Function (AF), and a Unified Data Management (UDM) included in a home network. In an embodiment, when the UE is in the localized service mode, the first hosted network may have a higher priority than the hosted network to which the UE is currently connected.

[0126] It should be noted that the above-mentioned configuration views, example views of the control / data signal transmission method, example views of the operation process, and configuration views are not intended to limit the scope of the present disclosure. In other words, all components, entities, or operation steps described in conjunction with the embodiments should not be interpreted as necessary components for practicing the present invention, and the present invention can be implemented with only some of these components without departing from the main purpose of the present invention. If necessary, these embodiments can be practiced in combination. For example, some methods proposed herein can be combined to operate network entities and UEs.

[0127] The above operations of the base station or UE can be implemented by equipping any component of the base station or UE with a memory device that stores the corresponding code. In other words, the controller in the eNB or terminal can perform the above operations by having a processor or central processing unit (CPU) read and execute the program code stored in the memory device.

[0128] As described herein, various components or modules in an entity, base station, or UE may be operated using hardware circuits, such as complementary metal oxide semiconductor (CMOS) based logic circuits, firmware, software, and / or hardware circuits using a combination of hardware, firmware, and / or software, such as embedded in a machine-readable medium. For example, electronic circuits such as transistors, logic gates, or ASICs may be used to implement various electronic structures and methods.

[0129] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs include instructions that enable the electronic device to execute the methods according to the embodiments described in the specification or claims of this disclosure.

[0130] A program (software module or software) may be stored in random access memory, nonvolatile memory including flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disk storage, optical disk ROM, digital versatile disc (DVD) or other types of optical storage devices, or cassette tapes. Alternatively, the program may be stored in a memory comprising a combination of all or part of the program. Each memory component may include multiple memories.

[0131] The program may be stored in an attachable storage device that can be accessed via a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), or a storage area network (SAN), or a combination thereof. The storage device may be connected to the device executing the embodiments of the present disclosure via an external port. A separate storage device on the communication network may be connected to the device executing the embodiments of the present disclosure.

[0132] In the specific embodiments described above, components included in the present disclosure are presented in either singular or plural form, depending on the specific embodiment being proposed. However, the singular or plural form is selected for ease of description to be appropriate to the context being presented, and the present disclosure is not limited to singular or plural components. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0133] Although specific embodiments of the present invention have been described above, various changes may be made thereto without departing from the scope of the invention. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be defined by the appended claims and their equivalents. In other words, it will be apparent to those skilled in the art that various changes may be made thereto without departing from the scope of the invention. In addition, these embodiments may be practiced in combination. For example, some of the methods proposed herein may be combined to operate a base station and a UE. Although embodiments are proposed in conjunction with 5G and NR systems, various modifications thereof may be applied to various other systems such as LTE, LTE-A, and LTE-A-Pro systems.

[0134] Although specific embodiments of the present invention have been described above, various changes can be made thereto without departing from the scope of the present invention. Therefore, the scope of the present disclosure should not be limited to the above embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method for a user equipment (UE) in a wireless communication system, the method comprising: receiving roaming guided SoR information from a network entity; In a case where the SoR information includes an indication to connect to a hosted network, or in a case where an input indicating determination to access a localized service is received from a user, selecting a first hosted network; as well as Sending a registration request message to the selected first hosted network, The first hosted network is selected based on at least one of domain name network name (DNN) information and slice information about at least one hosted network included in the SoR information.

2. The method according to claim 1, wherein Selecting your first managed network includes: determining whether a validity condition configured for at least one hosted network in the UE is satisfied; and scanning available networks and selecting the first hosted network from the at least one hosted network if the validity condition is met, and The validity condition is related to at least one of time validity and location validity of the hosting network.

3. The method according to claim 2, wherein: Determining whether the validity condition configured for the hosted network in the UE is met includes: determining whether the validity condition configured in the UE for the hosted network is satisfied in case a timer for identifying the validity condition expires, and The information related to the timer is included in the SoR information or preset in the UE.

4. The method according to claim 1, wherein The first hosted network is selected based on at least one list according to a preset priority, wherein the at least one list includes at least one of the following: a user-defined list of independent non-public networks (SNPNs) in a user-defined list of managed networks; A prioritized list controlled by the credential holders of the hosting network; A credential holder controlled priority list of the network selection group identity GIN for localized services; A list of subscribed SNPNs; and A list of other SNPNs configured in the UE that do not provide the localized service.

5. The method according to claim 1, wherein The UE is in one of a public land mobile network (PLMN) mode, a standalone non-public network (SNPN) mode, and a localized service mode.

6. The method according to claim 1, wherein In the case that the UE is in a public land mobile network (PLMN) mode, the network entity is one of a guided application function for roaming (SoR-AF), a third party application function (AF), and a unified data management (UDM) included in a home network.

7. The method according to claim 1, wherein In a case where the UE is in a localized service mode, the first hosted network has a higher priority than a hosted network to which the UE is currently connected.

8. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; and at least one processor, wherein the at least one processor is configured to: receiving roaming guided SoR information from a network entity; In a case where the SoR information includes an indication to connect to a hosted network, selecting a first hosted network; and sending a registration request message to the selected first hosted network, and The first hosted network is selected based on at least one of domain name network name (DNN) information and slice information about at least one hosted network included in the SoR information.

9. The UE according to claim 8, wherein: The at least one processor is configured to: determining whether a validity condition configured for at least one hosted network in the UE is satisfied; as well as In case the validity condition is satisfied, selecting a first hosted network from the at least one hosted network, and The validity condition is related to at least one of time validity and location validity of the hosting network.

10. The UE according to claim 9, wherein: The at least one processor is configured to, upon expiration of a timer for identifying the validity condition, determine whether the validity condition configured in the UE for the hosted network is satisfied, and The information related to the timer is included in the SoR information.

11. The UE according to claim 8, wherein: The first hosted network is selected based on at least one list according to a preset priority, wherein the at least one list includes at least one of the following: a user-defined list of independent non-public networks (SNPNs) in a user-defined list of managed networks; a prioritized list controlled by credential holders of said hosted network; A credential holder controlled priority list of the network selection group identity GIN for localized services; A list of subscribed SNPNs; and A list of other SNPNs configured in the UE that do not provide the localized service.

12. The UE according to claim 8, wherein: The UE is in one of a public land mobile network (PLMN) mode, a standalone non-public network (SNPN) mode, and a localized service mode.

13. The UE according to claim 8, wherein: In the case that the UE is in a public land mobile network (PLMN) mode, the network entity is one of a guided application function for roaming (SoR-AF), a third party application function (AF), and a unified data management (UDM) included in a home network.

14. The UE according to claim 8, wherein: In a case where the UE is in a localized service mode, the first hosted network has a higher priority than a hosted network to which the UE is currently connected.

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