Terminal access management method and wireless communication system

Abstract

The invention discloses a terminal access management method and a wireless communication system. The method comprises the following steps: receiving a joint attach request message sent by a terminal based on an IoT NTN access mode, the joint attach request message carrying service support capability information of the terminal; first information is obtained, and the first information comprises at least one of the following information: the type of a satellite accessed by the terminal, subscription information of the terminal and network capability information; determining a terminal auxiliary access strategy according to the service support capability information and / or the first information, the terminal auxiliary access strategy being used for indicating a network access mode corresponding to the service when the terminal executes the service; and sending a joint attachment response message carrying the terminal auxiliary access strategy to the terminal. The technical problem that the IoT NTN dual-mode single-standby terminal cannot flexibly select the network access mode when executing different services is solved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a terminal access management method and a wireless communication system. Background Art

[0002] With the rapid development of the Internet of Things (IoT) technology and the wide application of Non-Terrestrial Networks (NTN), especially the deployment of low Earth orbit, medium Earth orbit, and geostationary orbit satellite networks, the service scope and business model in the wireless communication field are undergoing a revolution. IoT NTN enables IoT devices to achieve data transmission and communication globally, including areas that are difficult to cover by traditional terrestrial networks, such as remote and ocean areas. However, IoT NTN technology faces challenges in supporting voice and data services.

[0003] Currently, the terrestrial-based 3GPP network has defined the specification of NB-IoT NTN (Narrow Band IoT NTN) to support IoT devices to access the network through satellites and achieve the transmission of small data and short messages. However, there is still a lack of effective solutions for supporting voice services. After a traditional NB-IoT NTN terminal accesses the 4G LTE network, it cannot initiate or receive voice services, which limits the application of the device in specific scenarios, such as emergency communication and human-machine interaction in remote areas. In addition, for a dual-mode single-standby terminal that supports 2G / 3G and NB-IoT NTN capabilities, there is a lack of a flexible mechanism in the prior art to control the selection of the terminal between different networks. When the terminal needs to use data services, it may need to return to the 4G network. However, without network guidance, the network selection behavior of the terminal is difficult to optimize, resulting in high service switching latency and poor user experience.

[0004] To address the above problems, no effective solutions have been proposed yet. Summary of the Invention

[0005] Embodiments of this application provide a terminal access management method and a wireless communication system to at least solve the technical problem that a dual-mode single-standby IoT NTN terminal cannot flexibly select a network access method when performing different services.

[0006] According to one aspect of the embodiments of the present application, a terminal access management method for a mobile management network element applied to a core network is provided, including: receiving a combined attachment request message sent by a terminal based on the Internet of Things non-terrestrial network (IoT NTN) access mode, where the combined attachment request message carries service support capability information of the terminal; obtaining first information, where the first information includes at least one of the following: the type of satellite to which the terminal is connected, the subscription information of the terminal, and network capability information; determining a terminal-assisted access policy based on the service support capability information and / or the first information, where the terminal-assisted access policy is used to indicate the network access mode corresponding to the service when the terminal performs the service; and sending a combined attachment response message carrying the terminal-assisted access policy to the terminal.

[0007] Optionally, the terminal-assisted access policy includes: the mapping relationship between the service type executed by the terminal and network access indication information, where the network access indication information is used to indicate the network access mode of the terminal when performing the corresponding type of service.

[0008] Optionally, the service types executed by the terminal include at least one of the following: voice service, data service.

[0009] Optionally, the types of network access indication information include at least one of the following: radio access technology type, radio frequency selection priority index, additional radio resource management policy index.

[0010] Optionally, the service support capability information includes: the support status and priority selection status of the terminal for different network access modes when performing different services.

[0011] Optionally, obtaining the first information includes: determining the type of satellite to which the terminal is connected according to the access mode of the terminal, where the satellite type includes at least one of the following: low Earth orbit satellite, medium Earth orbit satellite, geostationary orbit satellite; and / or, obtaining the subscription information of the terminal from a home subscription server or a home location register, where the subscription information includes at least one of the following: subscribed radio frequency selection priority index, subscribed additional radio resource management policy index, user type, user identifier; and / or, obtaining network capability information, where the network capability information includes at least one of the following: the support capability of the core network for different services, the support capability of other networks interoperating with the core network for different services.

[0012] Optionally, sending a combined attachment response message carrying the terminal-assisted access policy to the terminal includes: sending a combined attachment response message carrying both the terminal-assisted access policy and the terminal idle state residence policy to the terminal, where the terminal idle state residence policy is used to indicate the network access mode of the terminal in the idle state.

[0013] According to another aspect of the embodiments of the present application, another terminal access management method applied to a terminal is further provided, including: sending a combined attachment request message to a mobility management network element of a core network based on the IoT NTN access mode, where the combined attachment request message carries service support capability information of the terminal; receiving a combined attachment response message carrying a terminal-assisted access policy feedback by the mobility management network element, where the terminal-assisted access policy is determined by the mobility management network element based on the service support capability information and / or first information, and the first information includes at least one of the following: the satellite type accessed by the terminal, the subscription information of the terminal, and network capability information; when performing a service, selecting a network access mode corresponding to the service according to the terminal-assisted access policy to access the network.

[0014] Optionally, the terminal-assisted access policy includes: a mapping relationship between the service type executed by the terminal and network access indication information, where the network access indication information is used to indicate the network access mode of the terminal when performing a corresponding type of service.

[0015] Optionally, the service types executed by the terminal include at least one of the following: voice service, data service.

[0016] Optionally, the types of the network access indication information include at least one of the following: radio access technology type, radio frequency selection priority index, additional radio resource management policy index.

[0017] Optionally, receiving the combined attachment response message carrying the terminal-assisted access policy feedback by the mobility management network element includes: receiving a combined attachment response message carrying both the terminal-assisted access policy and the terminal idle state residence policy feedback by the mobility management network element, where the terminal idle state residence policy is used to indicate the network access mode of the terminal in the idle state.

[0018] Optionally, the above method further includes: in the idle state, selecting a network access mode corresponding to the terminal idle state residence policy to access the network.

[0019] According to another aspect of the embodiments of the present application, a wireless communication system is further provided, including: a terminal and a mobility management network element of the core network. The terminal is configured to send a combined attachment request message to the mobility management network element based on the IoT NTN access mode, where the combined attachment request message carries service support capability information of the terminal. The mobility management network element is configured to respond to the combined attachment request message, obtain first information, where the first information includes at least one of the following: the type of satellite accessed by the terminal, the subscription information of the terminal, and network capability information. Determine a terminal-assisted access policy based on the service support capability information and / or the first information, where the terminal-assisted access policy is used to indicate the network access mode corresponding to the service when the terminal performs the service. Send a combined attachment response message carrying the terminal-assisted access policy to the terminal. The terminal is further configured to receive the combined attachment response message and, when performing the service, select a network access mode corresponding to the service according to the terminal-assisted access policy to access the network.

[0020] According to another aspect of the embodiments of the present application, a computer program product is further provided. The computer program product includes: a computer program, where when the computer program is executed by a processor, the above-mentioned terminal access management method is implemented.

[0021] According to another aspect of the embodiments of the present application, a network device is further provided. The network device includes: a memory and a processor, where a computer program is stored in the memory, and the processor is configured to execute the above-mentioned terminal access management method through the computer program.

[0022] In the embodiments of the present application, a method for optimizing user service access determination based on IoT NTN is proposed. The core network element makes a comprehensive determination based on the service support capability information of the terminal, the type of satellite accessed, the subscription information of the terminal, the network capability information, etc., and formulates an assisted access policy for the terminal, so that when the dual-mode single-standby terminal performs different types of services, it can flexibly select the network access mode according to the assisted access policy issued by the core network element to meet the requirements of different service types, effectively solving the technical problem that the IoT NTN dual-mode single-standby terminal cannot flexibly select the network access mode when performing different services. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0024] Figure 1 It is a schematic structural diagram of an optional wireless communication system according to the embodiments of the present application;

[0025] Figure 2It is a schematic diagram of an optional wireless communication system interaction according to an embodiment of the present application;

[0026] Figure 3 It is a schematic flowchart of an optional terminal access management method according to an embodiment of the present application;

[0027] Figure 4 It is a schematic flowchart of another optional terminal access management method according to an embodiment of the present application;

[0028] Figure 5 It is a schematic structural diagram of an optional network device according to an embodiment of the present application. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] To better understand the embodiments of the present application, some nouns or terms that appear in the description process of the embodiments of the present application are translated and explained as follows:

[0032] Dual-mode single-standby: Dual-mode single-standby means that the terminal can support two different network modes (such as 2 / 3G and 4 / 5G) at the same time, but can only access one network for communication at any given moment. This design enables the terminal to intelligently switch between different networks to obtain the best service quality.

[0033] IoT NTN (Internet of Things Non-Terrestrial Network): It is an innovative network architecture that utilizes non-terrestrial communication systems, such as satellite networks, to provide connection services for IoT devices. Different from traditional IoT connections based on terrestrial cellular networks, IoT NTN aims to cover areas that are difficult to reach by terrestrial networks, such as the ocean, remote mountainous areas, or the air, to achieve a wider global connection. By using satellites as communication infrastructure, IoT NTN can provide services such as remote monitoring, data collection, and device management, especially suitable for application scenarios that require communication in vast geographical areas or special environments.

[0034] MSC (Mobile Services Switching Center): In 2G and 3G networks, the MSC is a key component in the core network, responsible for handling call control and handover in mobile phone services. It connects the wireless network and the fixed telephone network, enabling the exchange of telephone calls from mobile devices to fixed telephones or other mobile devices. The MSC also interacts with multiple network components, including base stations, mobile terminals, authentication centers, location registers, etc., to support the normal operation of mobile services.

[0035] VLR (Visitor Location Register): The VLR is a database in the mobile communication network that stores information about mobile users entering its coverage area, including temporary user identities, location information, and service permissions. When a mobile user enters a new area, the network temporarily stores the user's relevant information in the VLR for call establishment, location update, and mobility management. The VLR works closely with the MSC and is a key part of providing services for visiting users.

[0036] MME (Mobility Management Entity): It is a core network element in 4G networks, responsible for handling control plane functions related to mobility, including user attachment, location update, handover control, and user authentication. The MME also interacts with other core network elements such as HSS (Home Subscriber Server) and SGW (Serving Gateway) to manage and control user data and network resources.

[0037] AMF (Access and Mobility Management Function): In the 5G network architecture, it is one of the core network elements responsible for handling access and mobility management. It is mainly responsible for access control, mobility management, and session management of user equipment, ensuring that user equipment can correctly access the network and maintain the connection. When the user equipment moves, corresponding handover and update processes are carried out to maintain the continuity of communication and service quality.

[0038] Radio Access Technology (RAT): Used to describe different types of wireless technologies used in mobile communication networks. Different RATs represent different network standards, such as GSM, WCDMA, LTE, 5G NR (New Radio), etc. Each technology has its unique performance characteristics, such as coverage range, data rate, latency, and capacity. Network operators and devices can select the most suitable RAT according to service requirements, user location, and network resource status to optimize communication quality and service efficiency. In a multi-RAT environment, intelligent selection of RAT is crucial for providing a seamless user experience and efficient network resource management.

[0039] Radio Frequency Selection Priority Index (RFSPindex): It is a network management mechanism mainly used to guide user equipment to select the most suitable wireless network for connection in a multi-network environment. The RFSP index helps user equipment determine the optimal access network according to the priority order indicated by the network when it is in an idle or standby state, as well as when performing network selection or reselection by providing priority sorting for different radio access technologies and frequency bands.

[0040] Access Rights and Preferences Indicator (ARPI): ARPI is a supplement to the RFSP index. It contains more detailed radio resource management strategies, such as power control, frequency reuse, carrier selection, etc., as well as resource management rules for specific service types. ARPI can be used to control the use of radio resources by the terminal to ensure that different types of services (such as voice, data, video) can obtain optimal resource allocation according to their characteristics when sharing network resources.

[0041] Embodiment 1

[0042] According to the embodiment of the present application, first, a wireless communication system is provided. Figure 1 It is a schematic structural diagram of an optional wireless communication system, as Figure 1As shown in the figure, the system at least includes: a terminal 11 and a mobility management network element 12 of the core network, where:

[0043] The terminal 11 is used to send a combined attachment request message to the mobility management network element based on the IoT NTN access mode, where the combined attachment request message carries the service support capability information of the terminal;

[0044] The mobility management network element 12 is used to respond to the combined attachment request message, obtain first information, where the first information includes at least one of the following: the satellite type accessed by the terminal, the subscription information of the terminal, and network capability information; determine the terminal-assisted access policy according to the service support capability information and / or the first information, where the terminal-assisted access policy is used to indicate the network access mode corresponding to the service when the terminal executes the service; send a combined attachment response message carrying the terminal-assisted access policy to the terminal;

[0045] The terminal 11 is further used to receive the combined attachment response message, and when executing the service, select the network access mode corresponding to the service according to the terminal-assisted access policy to access the network.

[0046] As an optional implementation manner, the above terminal may be a dual-mode single-standby terminal based on IoT NTN, and the mobility management network element may be an MSC / VLR network element in a 2 / 3G network, or an MME network element in a 4G network, or an AMF network element in a 5G network, or may also be a relevant network element in a future 6G network.

[0047] Optionally, the network access mode indicated by the terminal-assisted access policy may specify the network mode accessed by the terminal, or may specify the specific access type of the terminal under a certain network mode. This application embodiment mainly illustrates with the network mode. The network mode may be divided into a first network mode and a second network mode, where the first network mode may be a 2G network or a 3G network, and the second network mode may be a 4G network, a 5G network, or a future 6G network.

[0048] Optionally, the service executed by the terminal may be a data service, a voice service, or other types of services. This application embodiment mainly illustrates with data services and voice services.

[0049] Figure 2 A more complete interaction schematic diagram of the wireless communication system is provided. As Figure 2 shown, in addition to the terminal and the mobility management network element of the relevant core network in the wireless communication system, it further includes a satellite and a base station. The terminal communicates with the core network through the satellite and the base station in the IoT NTN access mode. The following combines Figure 2 to make a detailed description of the process of the wireless communication system terminal accessing the network.

[0050] Step S1, the terminal initiates a combined attachment request.

[0051] As an optional implementation, the terminal sends a combined attachment request message to the mobility management entity of the core network based on the IoT NTN access mode, and the combined attachment request message carries the service support capability information of the terminal. Specifically, the terminal can first send the combined attachment request to the base station through the satellite link it supports, and the base station forwards the combined attachment request to the mobility management entity.

[0052] Among them, the service support capability information carried in the combined attachment request message usually includes: the support status and preferred selection status of the terminal for different network access modes when performing different services. For example, the service support capability information can be: whether the terminal supports and prefers to access the first network mode when performing voice services, whether it supports and prefers to access the second network mode, whether it supports and prefers to access the first network mode when performing data services, whether it supports and prefers to access the second network mode, so as to reflect the support situation and priority preference of the terminal for voice services and data services on 2 / 3G networks and 4 / 5G networks.

[0053] Step S2, the attachment process.

[0054] In this step, the mobility management entity starts to execute the attachment process of the core network, including authentication, location update (updating the location information of the terminal for subsequent services) and session establishment (establishing a connection for the terminal in the network). After successful authentication, the mobility management entity will cooperate with the serving gateway and the packet data gateway to establish an evolved packet system bearer for the terminal. The evolved packet system bearer defines the data transmission policy and service quality parameters between the terminal and the network. The mobility management entity will allocate a default bearer for the terminal to support data transmission.

[0055] Step S3, the mobility management entity generates a terminal-assisted access policy.

[0056] Specifically, after the mobility management entity completes authentication and location update, it can generate a terminal-assisted access policy to guide the terminal to select the optimal network access mode according to the service type.

[0057] As an optional implementation, when generating the terminal-assisted access policy, it can be achieved in the following way: obtain the first information, which includes at least one of the following: the satellite type accessed by the terminal, the subscription information of the terminal, and the network capability information; determine the terminal-assisted access policy based on the service support capability information and / or the first information.

[0058] Optionally, the first information can be obtained in the following ways: The satellite type to which the terminal is connected can be determined according to the access method of the terminal. Specific satellite types include, but are not limited to: low Earth orbit satellites, medium Earth orbit satellites, geostationary orbit satellites, and other satellites. The subscription information of the terminal can also be obtained from the home subscription server or the home location register. The subscription information includes, but is not limited to, one of the following: the subscribed radio frequency selection priority index, the subscribed additional radio resource management policy index, the user type, and the user identifier. The network capability information can also be obtained. The network capability information includes, but is not limited to: the support capabilities of the core network for different services, and the support capabilities of other networks interconnected with the core network for different services.

[0059] Optionally, the generated terminal assisted access policy may include: the mapping relationship between the service type executed by the terminal and the network access indication information. Among them, the network access indication information is used to indicate the network access mode of the terminal, and its types include, but are not limited to: radio access technology type, radio frequency selection priority index, and additional radio resource management policy index.

[0060] Specifically, the above mapping relationship may include: the first mapping relationship between the voice service and the network access indication information corresponding to the first network mode, the second mapping relationship between the voice service and the network access indication information corresponding to the second network mode, the third mapping relationship between the data service and the network access indication information corresponding to the first network mode, and the fourth mapping relationship between the data service and the network access indication information corresponding to the second network mode. Among them, the first mapping relationship and the second mapping relationship do not exist simultaneously, and the third mapping relationship and the fourth mapping relationship do not exist simultaneously.

[0061] Step S4, return an attach request response.

[0062] After the mobility management network element generates the terminal assisted access policy, it can send a combined attach response message carrying the terminal assisted access policy to the terminal.

[0063] Optionally, the mobility management network element can also send a combined attach response message carrying both the terminal assisted access policy and the terminal idle state residence policy to the terminal. Among them, the terminal idle state residence policy is used to indicate the network access mode of the terminal in the idle state.

[0064] In actual application, according to specific circumstances, the relevant policies are encapsulated in the combined attach response message as needed and can be forwarded by the base station to the terminal through the satellite link.

[0065] After the terminal receives the combined attach response message, it can perform corresponding network access or handover according to the relevant policies in the combined attach response message. Specifically, it can be divided into the following three cases.

[0066] Step S5, Idle Residency Selection.

[0067] Specifically, after receiving the combined attachment response message containing the terminal's idle state residency policy, the terminal will adjust its resident network in the idle state according to the terminal's idle state residency policy. If the terminal is currently in a 2 / 3G network and the terminal's idle state residency policy indicates to reside in the 2 / 3G network, the terminal will not make any adjustments and continue to reside in the 2 / 3G network, corresponding to step S5a; if the terminal is currently in a 2 / 3G network, but the terminal's idle state residency policy indicates to reside in a 4 / 5G network, the terminal needs to switch to the 4 / 5G network for residency, corresponding to step S5b; if the terminal is currently in a 4 / 5G network, but the terminal's idle state residency policy indicates to reside in the 2 / 3G network, the terminal needs to switch to the 2 / 3G network for residency, also corresponding to step S5a; if the terminal is currently in a 4 / 5G network and the terminal's idle state residency policy indicates to reside in the 4 / 5G network, the terminal will not make any adjustments, also corresponding to step S5b.

[0068] Among them, adding the terminal's idle state residency policy in the combined attachment response message is to ensure that when the terminal is idle, it can be guided to reside on the best network or frequency band according to the latest network conditions and user requirements, so as to reduce unnecessary network handovers when initiating new services, reduce call establishment latency, improve connection success rate, optimize network resource usage, and enhance the overall communication efficiency and user experience. In non-terrestrial network access such as IoT NTN, considering the complementarity and differences between satellite networks and terrestrial networks, the dynamic adjustment of this policy is particularly important to ensure flexible switching between different networks to meet its service requirements.

[0069] Step S6, Voice Service Initiation and Access.

[0070] Specifically, when the terminal needs to initiate a voice service, it will select an access network according to the indication for voice services in the terminal-assisted access policy. For example, if the policy indicates to access the 2 / 3G network and the terminal is currently resident in the 2 / 3G network, the voice service will be directly initiated through the 2 / 3G network, corresponding to step S6a; if the terminal is currently resident in the 4 / 5G network, it needs to first switch to the 2 / 3G network and then initiate the voice service, also corresponding to step S6a. At the same time, the mobility management network element coordinates with the mobile switching center / visitor location register to ensure the continuity and quality of service of the voice service. Correspondingly, when the policy indicates to access the 4 / 5G network, the terminal selects to access or switch to the 4 / 5G network according to the currently resident network, corresponding to step S6b.

[0071] In the terminal called scenario, still taking the policy indication to access the 2 / 3G network as an example, if the current terminal resides in the 4 / 5G network, the mobile management network element can first send a voice paging notification to the 4 / 5G network through the SGs interface. Based on the voice paging notification, the base station will guide the terminal to execute the switch from the 4 / 5G network to the 2 / 3G network through measurement control, measurement report, switching command and other processes, so that it can receive subsequent paging messages or voice services.

[0072] Step S7: data service initiation and access.

[0073] Specifically, when the terminal needs to initiate a data service, it will select the access network according to the instructions for data services in the terminal auxiliary access policy. For example, if the policy indicates access to the 4 / 5G network and the terminal currently resides in the 4 / 5G network, the data service is directly initiated through the 4 / 5G network, corresponding to step S7b; if the terminal currently resides in the 2 / 3G network, it is necessary to switch to the 4 / 5G network before initiating the data service, which also corresponds to step S7b. Correspondingly, when the policy indicates access to the 2 / 3G network, the terminal chooses to access or switch to the 2 / 3G network according to the network currently residing, corresponding to step S7a.

[0074] In the data downlink scenario, taking the policy indication access to the 4 / 5G network as an example, if the current terminal resides in the 2 / 3G network, the mobile management network element can first send a downlink data notification to the 2 / 3G network through the S3 / Gn interface (the signaling interaction interface between the 4G and 2 / 3G networks). Based on the downlink data notification, the base station will guide the terminal to switch from the 2 / 3G network to the 4 / 5G network through measurement control, measurement reporting, switching commands and other processes, so as to respond to data services later.

[0075] In an embodiment of the present application, through the above steps, intelligent collaboration between the network and the terminal can be achieved, and the access selection of different service types (such as data services and voice services) in different network environments (such as 4 / 5G networks and 2 / 3G networks) is optimized, thereby improving the utilization efficiency of system resources and enhancing user experience. In particular, in scenarios where data service and voice service demands coexist, network resources and user device behaviors can be managed more flexibly and efficiently.

[0076] Example 2

[0077] Based on the wireless communication system provided in Example 1, the embodiment of the present application also provides a terminal access management method for a mobile management network element applied to a core network. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0078] Figure 3 is a flow chart of an optional terminal access management method according to an embodiment of the present application, such as Figure 3 As shown, the method comprises the following steps:

[0079] Step S302, receiving a joint attachment request message sent by the terminal based on an IoT non-terrestrial network IoT NTN access mode, wherein the joint attachment request message carries service support capability information of the terminal;

[0080] Step S304, obtaining first information, wherein the first information includes at least one of the following: a type of satellite accessed by the terminal, subscription information of the terminal, and network capability information;

[0081] Step S306, determining a terminal assisted access policy according to the service support capability information and / or the first information, wherein the terminal assisted access policy is used to indicate a network access mode corresponding to the service when the terminal executes the service;

[0082] Step S308: Send a joint attach response message carrying a terminal assisted access policy to the terminal.

[0083] Among them, the above-mentioned mobile management network element can be the MSC / VLR network element in the 2 / 3G network, or the MME network element in the 4G network, or the AMF network element in the 5G network, and it can also be the relevant network element in the future 6G network, and the terminal can be a dual-mode single-standby terminal based on IoT NTN.

[0084] Optionally, the network access method indicated by the terminal-assisted access policy may specify the network standard accessed by the terminal, or may specify the specific access type of the terminal under a certain network standard. The embodiment of the present application is mainly described in terms of the network standard. The network standard may be divided into a first network standard and a second network standard, wherein the first network standard may be a 2G network or a 3G network, and the second network standard may be a 4G network, a 5G network, or a future 6G network.

[0085] Optionally, the service executed by the terminal may be a data service, a voice service, or other types of services. The embodiments of the present application are mainly described with reference to data services and voice services.

[0086] The following describes each step of the terminal access management method in conjunction with a specific implementation process.

[0087] As an optional implementation, the terminal sends a joint attachment request message to the mobile management network element of the core network based on the IoT NTN access mode, and the joint attachment request message carries the service support capability information of the terminal. Specifically, the terminal can first send a joint attachment request to the base station through the satellite link it supports, and the base station forwards the joint attachment request to the mobile management network element.

[0088] Among them, the service support capability information carried in the joint attachment request message usually includes: the terminal's support status and priority status for different network access methods when executing different services. For example, the service support capability information can be: whether the terminal supports and prioritizes access to the first network standard when executing voice services, whether it supports and prioritizes access to the second network standard, whether it supports and prioritizes access to the first network standard when executing data services, whether it supports and prioritizes access to the second network standard, which is used to reflect the terminal's support status and priority preference for voice services and data services on 2 / 3G networks and 4 / 5G networks.

[0089] After that, the mobility management network element starts to execute the core network attachment process, including authentication, location update (updating the terminal's location information for subsequent services) and session establishment (establishing a connection for the terminal in the network). After successful authentication, the mobility management network element will collaborate with the serving gateway) and the packet data gateway to establish an evolved packet system bearer for the terminal. The evolved packet system bearer defines the policy and service quality parameters for data transmission between the terminal and the network. The mobility management network element will allocate a default bearer to the terminal to support data transmission.

[0090] After completing the authentication and location update, the mobility management network element can generate a terminal assisted access policy, through which the terminal is guided to select the optimal network access method according to the service type.

[0091] As an optional implementation, when generating a terminal assisted access strategy, it can be achieved in the following way: obtaining first information, the first information including at least one of the following: the type of satellite accessed by the terminal, the contract information of the terminal, and the network capability information; determining the terminal assisted access strategy based on the service support capability information and / or the first information.

[0092] Among them, the mobile management network element can obtain the first information in the following ways: it can determine the type of satellite accessed by the terminal based on the access method of the terminal, and the specific satellite types include but are not limited to: low-earth orbit satellites, medium-earth orbit satellites, geostationary orbit satellites, and other satellites; it can also obtain the terminal's contract information from the home contract server or the home location register, and the contract information includes but is not limited to one of the following: the contracted wireless frequency selection priority index, the contracted additional wireless resource management policy index, the user type, and the user identifier; it can also obtain network capability information, and the network capability information includes but is not limited to: the core network's support capabilities for different services, and the support capabilities of other networks that are interconnected with the core network for different services.

[0093] Optionally, the generated terminal assisted access policy may include: a mapping relationship between the terminal execution service type and the network access indication information, wherein the network access indication information is used to indicate the network standard accessed by the terminal, and its types include but are not limited to: wireless access technology type, wireless frequency selection priority index, and additional wireless resource management policy index.

[0094] Specifically, the above mapping relationship may include: a first mapping relationship between a voice service and network access indication information corresponding to a first network standard, a second mapping relationship between a voice service and network access indication information corresponding to a second network standard, a third mapping relationship between a data service and network access indication information corresponding to the first network standard, and a fourth mapping relationship between a data service and network access indication information corresponding to the second network standard. The first mapping relationship and the second mapping relationship do not exist at the same time, and the third mapping relationship and the fourth mapping relationship do not exist at the same time.

[0095] After the mobility management network element generates the terminal-assisted access policy, it may send a joint attach response message carrying the terminal-assisted access policy to the terminal.

[0096] Optionally, the mobility management network element may also send a joint attachment response message carrying both the terminal assisted access policy and the terminal idle state residency policy to the terminal, wherein the terminal idle state residency policy is used to indicate a network access mode of the terminal in an idle state.

[0097] In actual application, according to the specific situation, the relevant policies are encapsulated in the joint attachment response message as needed, and can be forwarded to the terminal by the base station through the satellite link. After receiving the joint attachment response message, the terminal can perform corresponding network access or switching according to the relevant policies in the joint attachment response message.

[0098] In an embodiment of the present application, a method for optimizing user service access determination based on IoT NTN is proposed, in which the core network network element makes a comprehensive determination based on the service support capability information of the terminal, the type of satellite accessed, the contract information of the terminal, the network capability information, etc., and formulates an auxiliary access strategy for the terminal, so that the dual-mode single-standby terminal can flexibly select the network access method according to the auxiliary access strategy issued by the core network network element when executing different types of services to meet the needs of different service types, and effectively solves the technical problem that the IoT NTN dual-mode single-standby terminal cannot flexibly select the network access method when executing different services.

[0099] Example 3

[0100] Based on the wireless communication system provided in Example 1, the embodiment of the present application also provides a terminal access management method applied to a terminal. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0101] Figure 4 is a flow chart of another optional terminal access management method according to an embodiment of the present application, such as Figure 4 As shown, the method comprises the following steps:

[0102] Step S402: sending a joint attachment request message to a mobility management network element of a core network based on an IoT NTN access mode, wherein the joint attachment request message carries service support capability information of the terminal;

[0103] Step S404: receiving a joint attachment response message carrying a terminal assisted access policy fed back by the mobility management network element, wherein the terminal assisted access policy is determined by the mobility management network element according to the service support capability information and / or the first information, and the first information includes at least one of the following: a satellite type accessed by the terminal, subscription information of the terminal, and network capability information;

[0104] Step S406: When executing the service, select a network access method corresponding to the service according to the terminal-assisted access policy to access the network.

[0105] Among them, the above-mentioned terminal can be a dual-mode single-standby terminal based on IoT NTN, and the mobile management network element can be an MSC / VLR network element in a 2 / 3G network, or an MME network element in a 4G network, or an AMF network element in a 5G network, or a related network element in a future 6G network.

[0106] Optionally, the network access method indicated by the terminal-assisted access policy may specify the network standard accessed by the terminal, or may specify the specific access type of the terminal under a certain network standard. The embodiment of the present application is mainly described in terms of the network standard. The network standard may be divided into a first network standard and a second network standard, wherein the first network standard may be a 2G network or a 3G network, and the second network standard may be a 4G network, a 5G network, or a future 6G network.

[0107] Optionally, the service executed by the terminal may be a data service, a voice service, or other types of services. The embodiments of the present application are mainly described with reference to data services and voice services.

[0108] The following describes each step of the terminal access management method in conjunction with a specific implementation process.

[0109] As an optional implementation, the terminal sends a joint attachment request message to the mobile management network element of the core network based on the IoT NTN access mode, and the joint attachment request message carries the service support capability information of the terminal. Specifically, the terminal can first send a joint attachment request to the base station through the satellite link it supports, and the base station forwards the joint attachment request to the mobile management network element.

[0110] Among them, the service support capability information carried in the joint attachment request message usually includes: the terminal's support status and priority status for different network access methods when executing different services. For example, the service support capability information can be: whether the terminal supports and prioritizes access to the first network standard when executing voice services, whether it supports and prioritizes access to the second network standard, whether it supports and prioritizes access to the first network standard when executing data services, whether it supports and prioritizes access to the second network standard, which is used to reflect the terminal's support status and priority preference for voice services and data services on 2 / 3G networks and 4 / 5G networks.

[0111] After that, the mobility management network element starts to execute the core network attachment process, including authentication, location update (updating the terminal's location information for subsequent services) and session establishment (establishing a connection for the terminal in the network). After successful authentication, the mobility management network element will collaborate with the serving gateway and the packet data gateway to establish an evolved packet system bearer for the terminal.

[0112] After completing the authentication and location update, the mobility management network element can generate a terminal assisted access policy, through which the terminal is guided to select the optimal network access method according to the service type.

[0113] As an optional implementation, when generating a terminal assisted access strategy, it can be achieved in the following way: obtaining first information, the first information including at least one of the following: the type of satellite accessed by the terminal, the contract information of the terminal, and the network capability information; determining the terminal assisted access strategy based on the service support capability information and / or the first information.

[0114] Among them, specific satellite types include but are not limited to: low-Earth orbit satellites, medium-Earth orbit satellites, geostationary orbit satellites, and other satellites; the terminal's contract information includes but is not limited to one of the following: the contracted wireless frequency selection priority index, the contracted additional wireless resource management policy index, user type, user identification; network capability information includes but is not limited to: the core network's support capabilities for different services, and the support capabilities of other networks interconnected with the core network for different services.

[0115] Optionally, the generated terminal assisted access policy may include: a mapping relationship between the terminal execution service type and the network access indication information, wherein the network access indication information is used to indicate the network standard accessed by the terminal, and its types include but are not limited to: wireless access technology type, wireless frequency selection priority index, and additional wireless resource management policy index.

[0116] Specifically, the above mapping relationship may include: a first mapping relationship between a voice service and network access indication information corresponding to a first network standard, a second mapping relationship between a voice service and network access indication information corresponding to a second network standard, a third mapping relationship between a data service and network access indication information corresponding to the first network standard, and a fourth mapping relationship between a data service and network access indication information corresponding to the second network standard. The first mapping relationship and the second mapping relationship do not exist at the same time, and the third mapping relationship and the fourth mapping relationship do not exist at the same time.

[0117] After the mobility management network element generates the terminal-assisted access policy, it may send a joint attach response message carrying the terminal-assisted access policy to the terminal.

[0118] Optionally, the mobility management network element may also send a joint attachment response message carrying both the terminal assisted access policy and the terminal idle state residency policy to the terminal, wherein the terminal idle state residency policy is used to indicate a network access mode of the terminal in an idle state.

[0119] In actual application, according to the specific situation, the relevant policies are encapsulated in the joint attachment response message as needed, and can be forwarded to the terminal by the base station through the satellite link. After receiving the joint attachment response message, the terminal can perform corresponding network access or switching according to the relevant policies in the joint attachment response message, which can be divided into the following three situations:

[0120] In the idle state scenario, the terminal selects a network access method corresponding to the terminal idle state residence policy to access the network in the idle state.

[0121] Specifically, after the terminal receives the joint attachment response message containing the terminal idle state residency policy, it will adjust its residency network in the idle state according to the terminal idle state residency policy. If the terminal is currently in a 2 / 3G network, and the terminal idle state residency policy points to reside in the 2 / 3G network, the terminal does not make any adjustments and continues to reside in the 2 / 3G network; if the terminal is currently in a 2 / 3G network, but the terminal idle state residency policy points to reside in a 4 / 5G network, the terminal needs to switch to the 4 / 5G network for residency; if the terminal is currently in a 4 / 5G network, but the terminal idle state residency policy points to reside in a 2 / 3G network, the terminal needs to switch to the 2 / 3G network for residency; if the terminal is currently in a 4 / 5G network, and the terminal idle state residency policy points to reside in a 4 / 5G network, the terminal does not make any adjustments.

[0122] In the voice service scenario, when the terminal needs to initiate a voice service, it will select the access network according to the instructions for voice services in the terminal auxiliary access policy. For example, if the policy indicates access to the 2 / 3G network and the terminal currently resides in the 2 / 3G network, the voice service is directly initiated through the 2 / 3G network; if the terminal currently resides in the 4 / 5G network, it is necessary to switch to the 2 / 3G network before initiating the voice service. At the same time, the mobile management network element coordinates with the mobile switching center / visitor location register to ensure the continuity and service quality of the voice service. Correspondingly, when the policy indicates access to the 4 / 5G network, the terminal chooses to access or switch to the 4 / 5G network according to the network it currently resides in.

[0123] Optionally, in the terminal called scenario, still taking the policy indication to access the 2 / 3G network as an example, if the current terminal resides in the 4 / 5G network, the mobile management network element can first send a voice paging notification to the 4 / 5G network through the SGs interface. Based on the voice paging notification, the base station will guide the terminal to execute the switch from the 4 / 5G network to the 2 / 3G network through measurement control, measurement report, switching command and other processes, so that it can subsequently receive subsequent paging messages or voice services.

[0124] In the data service scenario, when the terminal needs to initiate a data service, it will select the access network according to the instructions for data services in the terminal auxiliary access policy. For example, if the policy indicates access to the 4 / 5G network and the terminal currently resides in the 4 / 5G network, the data service is directly initiated through the 4 / 5G network; if the terminal currently resides in the 2 / 3G network, it needs to switch to the 4 / 5G network before initiating the data service. Correspondingly, when the policy indicates access to the 2 / 3G network, the terminal chooses to access or switch to the 2 / 3G network according to the network it currently resides in.

[0125] Optionally, in the data downlink scenario, still taking the policy indication access to the 4 / 5G network as an example, if the current terminal resides in the 2 / 3G network, the mobile management network element can first send a downlink data notification to the 2 / 3G network through the S3 / Gn interface (the signaling interaction interface between the 4G and 2 / 3G networks). Based on the downlink data notification, the base station will guide the terminal to execute the switch from the 2 / 3G network to the 4 / 5G network through measurement control, measurement reporting, switching commands and other processes, so as to respond to data services later.

[0126] In an embodiment of the present application, a method for optimizing user service access determination based on IoT NTN is proposed, in which the core network network element makes a comprehensive determination based on the service support capability information of the terminal, the type of satellite accessed, the contract information of the terminal, the network capability information, etc., and formulates an auxiliary access strategy for the terminal, so that the dual-mode single-standby terminal can flexibly select the network access method according to the auxiliary access strategy issued by the core network network element when executing different types of services to meet the needs of different service types, and effectively solves the technical problem that the IoT NTN dual-mode single-standby terminal cannot flexibly select the network access method when executing different services.

[0127] Example 4

[0128] According to an embodiment of the present application, a computer program product is also provided, which includes a computer program, wherein when the computer program is executed by a processor, the terminal access management method in Example 2 or Example 3 is implemented.

[0129] According to an embodiment of the present application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein the device where the non-volatile storage medium is located executes the terminal access management method in Example 2 or Example 3 by running the computer program.

[0130] According to an embodiment of the present application, a processor is further provided, which is used to run a computer program, wherein the terminal access management method in Example 2 or Example 3 is executed when the computer program is running.

[0131] According to an embodiment of the present application, a network device is also provided, which includes: a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the terminal access management method in Example 2 or Example 3 through the computer program.

[0132] Optionally, when the computer program is running, the following steps can be executed: receiving a joint attachment request message sent by a terminal based on an Internet of Things non-terrestrial network IoT NTN access method, wherein the joint attachment request message carries service support capability information of the terminal; obtaining first information, wherein the first information includes at least one of the following: the type of satellite accessed by the terminal, the contract information of the terminal, and the network capability information; determining a terminal-assisted access policy based on the service support capability information and / or the first information, wherein the terminal-assisted access policy is used to indicate the network access method corresponding to the service when the terminal executes the service; and sending a joint attachment response message carrying the terminal-assisted access policy to the terminal.

[0133] Optionally, when the computer program is running, the following steps can also be executed: sending a joint attachment request message to the mobile management network element of the core network based on the IoT NTN access method, wherein the joint attachment request message carries the service support capability information of the terminal; receiving a joint attachment response message carrying the terminal assisted access policy fed back by the mobile management network element, wherein the terminal assisted access policy is determined by the mobile management network element based on the service support capability information and / or the first information, and the first information includes at least one of the following: the satellite type accessed by the terminal, the contract information of the terminal, and the network capability information; when executing the service, selecting the network access method corresponding to the service according to the terminal assisted access policy to access the network.

[0134] As an optional implementation, the above network device may exist in the form of a mobile terminal, a computer terminal or a similar computing device. Figure 5 FIG. 1 shows a hardware structure block diagram of a network device for implementing a terminal access management method. Figure 5 As shown, the network device 50 may include one or more (502a, 502b, ..., 502n are used to illustrate) processors 502 (the processor 502 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 504 for storing data, and a transmission device 506 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 5 The structure shown is only for illustration and does not limit the structure of the above network device. Figure 5 More or fewer components as shown, or with Figure 5 Different configurations are shown.

[0135] It should be noted that the one or more processors 502 and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the network device 50. As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0136] The memory 504 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the terminal access management method in the embodiment of the present application. The processor 502 executes various functional applications and data processing by running the software programs and modules stored in the memory 504, that is, realizing the vulnerability detection method of the above-mentioned application. The memory 504 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 504 may further include a memory remotely arranged relative to the processor 502, and these remote memories may be connected to the network device 50 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0137] The transmission device 506 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the network device 50. In one example, the transmission device 506 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 506 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0138] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the network device 50 .

[0139] The serial numbers of the above embodiments are only for description and do not represent the advantages or disadvantages of the embodiments.

[0140] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0142] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0143] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0144] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0145] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A terminal access management method, applied to a mobility management network element of a core network, characterized in that: include: A receiving terminal sends a joint attachment request message based on an IoT non-terrestrial network IoT NTN access mode, wherein the joint attachment request message carries service support capability information of the terminal; Acquire first information, wherein the first information includes at least one of the following: a type of satellite accessed by the terminal, subscription information of the terminal, and network capability information; Determine a terminal assisted access policy according to the service support capability information and / or the first information, wherein the terminal assisted access policy is used to indicate a network access mode corresponding to the service when the terminal executes the service; A joint attach response message carrying the terminal assisted access policy is sent to the terminal.

2. The method according to claim 1, characterized in that The terminal assisted access strategy includes: a mapping relationship between the service type executed by the terminal and the network access indication information, wherein the network access indication information is used to indicate the network access mode of the terminal when executing the corresponding type of service.

3. The method according to claim 2, characterized in that The service type executed by the terminal includes at least one of the following: voice service and data service.

4. The method according to claim 2, characterized in that: The type of the network access indication information includes at least one of the following: a wireless access technology type, a wireless frequency selection priority index, and an additional wireless resource management policy index.

5. The method according to claim 1, characterized in that The service support capability information includes: the support status and priority selection status of the terminal for different network access modes when executing different services.

6. The method according to claim 1, characterized in that Obtain the first information, including: Determining a satellite type accessed by the terminal according to an access mode of the terminal, wherein the satellite type includes at least one of the following: a low earth orbit satellite, a medium earth orbit satellite, and a geostationary orbit satellite; and / or, Acquiring the subscription information of the terminal from a home subscription server or a home location register, wherein the subscription information includes at least one of the following: a subscription wireless frequency selection priority index, a subscription additional wireless resource management policy index, a user type, and a user identifier; and / or, Acquire network capability information, wherein the network capability information includes at least one of the following: the core network's support capability for different services, and the support capability of other networks interoperable with the core network for different services.

7. The method according to claim 1, characterized in that Sending a joint attach response message carrying the terminal assisted access policy to the terminal includes: A joint attachment response message carrying both the terminal assisted access policy and the terminal idle state residency policy is sent to the terminal, wherein the terminal idle state residency policy is used to indicate a network access mode of the terminal in an idle state.

8. A terminal access management method, applied to a terminal, characterized in that: include: Sending a joint attachment request message to a mobility management network element of a core network based on an IoT NTN access mode, wherein the joint attachment request message carries service support capability information of the terminal; receiving a joint attachment response message carrying a terminal assisted access policy fed back by the mobility management network element, wherein the terminal assisted access policy is determined by the mobility management network element according to the service support capability information and / or first information, and the first information includes at least one of the following: a satellite type accessed by the terminal, subscription information of the terminal, and network capability information; When executing a service, a network access method corresponding to the service is selected according to the terminal-assisted access policy to access the network.

9. The method according to claim 8, characterized in that The terminal assisted access strategy includes: a mapping relationship between the service type executed by the terminal and the network access indication information, wherein the network access indication information is used to indicate the network access mode of the terminal when executing the corresponding type of service.

10. The method according to claim 9, characterized in that The service type executed by the terminal includes at least one of the following: voice service and data service.

11. The method according to claim 9, characterized in that The type of the network access indication information includes at least one of the following: a wireless access technology type, a wireless frequency selection priority index, and an additional wireless resource management policy index.

12. The method according to claim 8, characterized in that Receiving a joint attachment response message carrying a terminal assisted access policy fed back by the mobility management network element, including: A joint attachment response message carrying the terminal assisted access policy and the terminal idle state residency policy is received as feedback from the mobility management network element, wherein the terminal idle state residency policy is used to indicate a network access mode of the terminal in an idle state.

13. The method according to claim 12, characterized in that The method further comprises: In the idle state, a network access method corresponding to the idle state residence policy of the terminal is selected to access the network.

14. A wireless communication system, characterized in that: include: The mobility management network elements of the terminal and the core network, where: The terminal is used to send a joint attachment request message to the mobility management network element based on the IoT NTN access mode, wherein the joint attachment request message carries the service support capability information of the terminal; The mobility management network element is used to respond to the joint attachment request message to obtain first information, wherein the first information includes at least one of the following: a satellite type accessed by the terminal, subscription information of the terminal, and network capability information; determine a terminal assisted access policy according to the service support capability information and / or the first information, wherein the terminal assisted access policy is used to indicate a network access mode corresponding to the service when the terminal executes the service; and send a joint attachment response message carrying the terminal assisted access policy to the terminal; The terminal is further configured to receive the joint attachment response message and, when executing a service, select a network access method corresponding to the service according to the terminal-assisted access policy to access the network.

15. A computer program product, characterized in that include: A computer program, wherein when the computer program is executed by a processor, the terminal access management method according to any one of claims 1 to 13 is implemented.

16. A network device, characterized in that: include: A memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the terminal access management method according to any one of claims 1 to 13 through the computer program.

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