Mobility registration method and apparatus, and communication device and storage medium

Abstract

The present application relates to the technical field of 5G communications, and particularly relates to a mobility registration method and apparatus, and a communication device and a storage medium. The method comprises: when a network to which an AMF network element belongs provides a disaster roaming service, a UE sending a registration request message to the AMF network element; and on the basis of a magnitude relationship between a preset threshold and the number of received registration request messages, the AMF network element sending to the UE a registration acceptance message carrying an expanded or reduced tracking area list.

Description

Mobile registration method, device, communication equipment and storage medium

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202311142669X, filed on September 6, 2023, entitled “Mobile registration method, device, communication equipment and storage medium,” the entire text of which is hereby incorporated by reference. Technical Field

[0003] The present application relates to the field of 5G communication technology, and in particular to a mobile registration method, apparatus, communication equipment and storage medium. Background Art

[0004] In 5G (fifth-generation mobile networks) systems, core network elements and base stations may experience unexpected downtime due to natural disasters, equipment failures, or human intervention, resulting in the network being unable to provide services to users. Currently, the 3GPP (3rd Generation Partnership Project) has defined disaster roaming services, which allow users of one network to roam to another network when a network failure makes it unavailable.

[0005] When the fault covers a wide area and affects a large number of users, a large number of users will initiate registration processes in a short period of time, causing network signaling overload for roaming access, which in turn affects the service quality of users resident on the roaming access network itself.

[0006] Summary of the Invention

[0007] In a first aspect, the present application provides a mobile registration method, applied to an AMF network element, the method comprising:

[0008] When the network to which the AMF network element belongs provides disaster roaming services, receiving a registration request message sent by the user equipment UE;

[0009] According to the relationship between the preset threshold and the number of received registration request messages, a registration accept message carrying the expanded or reduced tracking area list is sent to the UE.

[0010] In one embodiment, sending a registration accept message carrying an expanded or reduced tracking area list to the UE based on a relationship between a preset threshold and the number of received registration request messages includes:

[0011] If the number of registration request messages received at the current moment or in the future is greater than a first preset threshold, sending a registration accept message carrying an expanded tracking area list to the UE;

[0012] If the number of registration request messages received at the current moment or in the future is less than the second preset threshold, a registration accept message carrying the reduced tracking area list is sent to the UE.

[0013] In one embodiment, the registration request message includes an initial registration request message and a registration update request message.

[0014] In one embodiment, if the registration request message is a registration update request message, then when the network to which the AMF network element belongs provides disaster roaming services, before receiving the registration request message sent by the user equipment UE, the method further includes:

[0015] Receive an initial registration request message sent by the UE;

[0016] Send a registration accept message carrying the initial tracking area list to the UE.

[0017] In one embodiment, if the registration request message is an initial registration request message, after sending a registration accept message carrying the expanded or reduced tracking area list to the UE, the method further includes:

[0018] Receive registration update request information sent by UE;

[0019] Again, based on the relationship between the preset threshold and the number of received registration request messages, a registration accept message carrying the expanded or reduced tracking area list is sent to the UE.

[0020] In a second aspect, the present application provides a mobile registration method, applied to a UE, the method comprising:

[0021] If the network to which the AMF network element belongs provides disaster roaming services, a registration request message is sent to the AMF network element;

[0022] The receiving AMF network element sends a registration acceptance message carrying an expanded or reduced tracking area list based on the relationship between the preset threshold and the number of received registration request messages.

[0023] In one embodiment, the registration request message includes an initial registration request message and a registration update request message.

[0024] In one embodiment, if the registration request message is a registration update request message, then when the network to which the AMF network element belongs provides disaster roaming service, before sending the registration request message to the AMF network element, the method further includes:

[0025] Send an initial registration request message to the AMF network element;

[0026] Receive the registration acceptance message sent by the AMF network element carrying the initial tracking area list.

[0027] In one embodiment, if the registration request message is a registration update request message, then when the network to which the AMF network element belongs provides disaster roaming service, sending the registration request message to the AMF network element includes:

[0028] When the network to which the AMF network element belongs provides disaster roaming services, if the device moves outside the tracking area indicated by the initial tracking area list, a registration update request message is sent to the AMF network element.

[0029] In one embodiment, after receiving a registration accept message carrying an initial tracking area list sent by an AMF network element, the method further includes:

[0030] Initialize the timer;

[0031] If the registration request message is a registration update request message, then if the network to which the AMF network element belongs provides disaster roaming service, the registration request message is sent to the AMF network element, including:

[0032] When the network to which the AMF network element belongs provides disaster roaming services, if the timer exceeds the timing duration, a registration update request message is sent to the AMF network element.

[0033] In one embodiment, if the registration request message is an initial registration request message, after receiving the registration accept message sent by the AMF network element carrying the expanded or reduced tracking area list, the method further includes:

[0034] Send a registration update request message to the AMF network element;

[0035] Receive the registration acceptance message sent by the AMF network element again based on the relationship between the preset threshold and the number of received registration request messages, carrying the expanded or reduced tracking area list. In a third aspect, the present application also provides a mobile registration device, configured in the AMF network element, the device comprising:

[0036] A first receiving module is configured to receive a registration request message sent by the UE when the network to which the AMF network element belongs provides a disaster roaming service;

[0037] The first sending module is configured to send a registration accept message carrying an expanded or reduced tracking area list to the UE according to a relationship between a preset threshold and the number of received registration request messages.

[0038] In a fourth aspect, the present application further provides a mobile registration device, configured on a UE, comprising:

[0039] The second sending module is used to send a registration request message to the AMF network element when the network to which the AMF network element belongs provides disaster roaming service;

[0040] The second receiving module is used to receive a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the size relationship between a preset threshold and the number of received registration request messages.

[0041] In a fifth aspect, the present application further provides a communication device, comprising a transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program;

[0042] The receiver is used to receive a registration request message sent by the UE when the network to which the AMF network element belongs provides disaster roaming services;

[0043] The transmitter is configured to send a registration accept message carrying an expanded or reduced tracking area list to the UE according to a relationship between a preset threshold and the number of received registration request messages.

[0044] In a sixth aspect, the present application further provides a communication device, comprising a transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program;

[0045] The transmitter is used to send a registration request message to the AMF network element when the network to which the AMF network element belongs provides disaster roaming service;

[0046] The receiver is used to receive a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the size relationship between a preset threshold and the number of received registration request messages.

[0047] In a seventh aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method of the first or second aspect mentioned above when the computer program is executed by a processor.

[0048] In an eighth aspect, the present application further provides a computer program product, comprising a computer program, which implements the steps of the method of the first aspect or the second aspect when executed by a processor.

[0049] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are merely some embodiments of the present application and do not constitute a limitation on the disclosure content and protection scope of the present application.

[0051] FIG1 is an application scenario diagram of a mobile registration method according to an embodiment;

[0052] FIG2 is a schematic diagram of a flow chart of a UE-side mobile registration method according to an embodiment;

[0053] FIG3 is a schematic diagram of a flow chart of a UE-side mobile registration method in another embodiment;

[0054] FIG4 is a schematic diagram of a flow chart of a UE-side mobile registration method according to another embodiment;

[0055] FIG5 is a schematic diagram of a flow chart of a UE-side mobile registration method in yet another embodiment;

[0056] FIG6 is a schematic diagram of a flow chart of a network-side mobile registration method according to an embodiment;

[0057] FIG7 is a flow chart of a network-side mobile registration method according to another embodiment;

[0058] FIG8 is a schematic diagram of a flow chart of a network-side mobile registration method according to another embodiment;

[0059] FIG9 is a schematic diagram of a flow chart of a mobile registration method according to an embodiment;

[0060] FIG10 is a schematic flow chart of a mobile registration method in another embodiment;

[0061] FIG11 is a block diagram of a mobile registration device according to an embodiment;

[0062] FIG12 is a structural block diagram of a mobile registration device in another embodiment;

[0063] FIG13 is a structural block diagram of a mobile registration device in another embodiment;

[0064] FIG14 is a structural block diagram of a mobile registration device in yet another embodiment. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0066] The mobile registration method provided in the embodiment of the present application can be applied in the application environment shown in Figure 1. In particular, the user equipment 101 can send a registration request message to the network's AMF (Access and Mobility Management Function) network element 102 to request access to the network. Then, the AMF network element 102 sends a registration acceptance message to the user equipment 101. The registration acceptance message carries a tracking area list, namely, a TAI (Tracking Area Identity) List. The tracking area list is used to indicate the tracking areas in which the user equipment 101 can receive paging.

[0067] Specifically, the registration request message sent by the user equipment 101 to the AMF network element may include an initial registration request message and a registration update request message. In the case where the network provides disaster roaming services, the registration acceptance message sent by the AMF network element 102 to the user equipment 101 carries an expanded or reduced tracking area list.

[0068] User device 101 may be a resident user of the aforementioned network or a user newly connected to the aforementioned network through the disaster roaming service. User device 101 may include, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices may include smart speakers, smart TVs, smart air conditioners, and smart in-vehicle devices. Portable wearable devices may include smart watches, smart bracelets, and head-mounted devices.

[0069] In one embodiment, as shown in FIG2 , a mobile registration method is provided, which is applied to an AMF network element and includes the following steps:

[0070] S201, when the network to which the AMF network element belongs provides disaster roaming service, receiving a registration request message sent by the user equipment UE.

[0071] The main functions of the AMF network element include access authorization and authentication, connection management, and mobility management. Disaster roaming service, as defined by 3GPP, allows users of one network to roam to another network when a network fails. The network to which the AMF network element belongs is the other network to which users are allowed to roam.

[0072] The registration request message includes the initial registration request message and the registration update request message. When the UE (User Equipment) requests the AMF network element to access the network to which the AMF network element belongs for the first time, the UE sends the initial registration request message. When the UE requests the AMF network element to access the network to which the AMF network element belongs for the first time, the UE sends the registration update message. Among them, the UE is a resident UE of the network to which the AMF network element belongs or a UE accessing the network to which the AMF network element belongs through the disaster roaming service.

[0073] When the network to which it belongs is configured to allow disaster roaming users to access, the AMF network element receives the registration request message sent by the UE.

[0074] S202: Send a registration accept message carrying an expanded or reduced tracking area list to the UE according to a relationship between a preset threshold and the number of received registration request messages.

[0075] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0076] To determine the location of a UE, the LTE (Long Term Evolution) network coverage area is divided into tracking areas. A tracking area is the basic unit for location updates and paging, and can include one or more cells. A tracking area list records tracking area identifiers. When the network needs to page a UE, it sends a paging message to the UE within the cells within the tracking areas indicated in the tracking area list.

[0077] Obtain the number of registration request messages received by the AMF network element at the same time, and the preset threshold value of the number of registration request messages received at the same time. According to the size relationship between the two, determine whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, the AMF network element sends a registration acceptance message carrying the expanded or reduced tracking area list to the UE based on the judgment result.

[0078] Specifically, if the number of received registration request messages exceeds the preset threshold, it means that the AMF network element receives a lot of signaling at the same time, and the network to which the AMF network element belongs may have a signaling load. Therefore, the AMF network element can send an expanded tracking area list to the UE to avoid the UE frequently sending registration request messages to the AMF network element again during the movement process, thereby achieving the purpose of controlling signaling overload. Correspondingly, if the number of received registration request messages does not exceed the preset threshold, the AMF network element can send a reduced tracking area list to the UE to reduce the paging load of the network to which the AMF network element belongs, thereby achieving the purpose of elastic control.

[0079] It can be understood that the AMF network element can also receive the registration request message sent by the UE when the network to which it belongs is not configured to allow disaster roaming users to access. However, the AMF network element will only send a registration acceptance message carrying the initial tracking area list to the UE. Only when the network to which it belongs is configured to allow disaster roaming users to access, will the AMF network element send a registration acceptance message carrying the expanded or reduced tracking area list to the UE after receiving the registration request message sent by the UE.

[0080] In the above solution, when the network to which the AMF network element belongs provides disaster roaming services, the UE sends a registration request message to the AMF network element, and then the AMF network element sends a registration accept message carrying an expanded or reduced tracking area list to the UE based on the relationship between the preset threshold and the number of received registration request messages. In this embodiment, the AMF network element returns a tracking area list with updated coverage, i.e., an expanded or reduced tracking area list, to the UE that sent the registration request message based on the number of received registration request messages, so as to reduce the UE's mobile registration update frequency, thereby avoiding signaling overload.

[0081] To determine whether to send an expanded tracking area list or a reduced tracking area list, based on the above embodiment, in one embodiment, the determination may be based on a first preset threshold and a second preset threshold, respectively. As shown in FIG3 , the mobile registration method may include:

[0082] S301, when the network to which the AMF network element belongs provides disaster roaming service, receives a registration request message sent by the user equipment UE.

[0083] When the UE requests the AMF network element to access the network to which the AMF network element belongs for the first time, the UE sends an initial registration request message. When the UE requests the AMF network element to access the network to which the AMF network element belongs for the first time, the UE sends a registration update message.

[0084] When the network to which it belongs is configured to allow disaster roaming users to access, the AMF network element receives the registration request message sent by the UE.

[0085] S302: When the number of registration request messages received at the current moment or in the future is greater than a first preset threshold, send a registration accept message carrying an expanded tracking area list to the UE.

[0086] Optionally, the number of registration request messages received at the current moment is obtained through a preset network element or device, for example, the number of registration request messages received at the current moment is obtained through a C-IWF (Converged Interworking Function) network element, and this embodiment does not limit this. The number of registration request messages received at a future moment is predicted through a neural network algorithm, for example, the number of registration request messages received at a future moment is predicted through an LSTM (Long Short Term Memory) algorithm, and this embodiment does not limit this.

[0087] Further, it is determined whether the number of registration request messages received at the current moment or in the future is greater than the first preset threshold. If the number of registration request messages received at the current moment or in the future is greater than the first preset threshold, a registration acceptance message carrying the expanded tracking area list is sent to the UE.

[0088] An expanded tracking area list is a tracking area list that is expanded from a regular tracking area list. Compared to a regular tracking area list, an expanded tracking area list contains more cells. During mobile registration, if a UE moves outside the tracking area indicated by the tracking area list, it needs to send a registration update request message to the AMF network element. The expanded tracking area list can reduce the frequency of the UE sending registration update request messages, thereby avoiding network signaling overload.

[0089] S303: When the number of registration request messages received at the current moment or in the future is less than a second preset threshold, a registration accept message carrying a reduced tracking area list is sent to the UE.

[0090] Determine whether the number of registration request messages received at the current moment or in the future is less than a first preset threshold; if the number of registration request messages received at the current moment or in the future is less than a second preset threshold, send a registration acceptance message carrying a reduced tracking area list to the UE.

[0091] A reduced tracking area list refers to a tracking area list that is reduced based on a regular tracking area list or an expanded tracking area list. Compared to a regular tracking area list, a reduced tracking area list contains fewer cells. Since the network sends a paging message to the UE within the cells included in the tracking area indicated by the tracking area list when it needs to page the UE, the reduced tracking area list can reduce the paging load of the network. Compared to an expanded tracking area list, a reduced tracking area list can be a reduced regular tracking area list. When there is no signaling load threat to the network, reducing the tracking area list to a regular size can achieve the purpose of flexible control.

[0092] It should be noted that the first preset threshold and the second preset threshold may be different thresholds or the same threshold.

[0093] In this embodiment, the size of the tracking area list carried in the returned registration acceptance message is determined based on the number of registration request messages received at the current moment, which can ensure the accuracy of the result. The size of the tracking area list carried in the returned registration acceptance message is determined based on the predicted number of registration request messages received in the future moment, which can control the signaling amount before the network signaling is overloaded, and has a better control effect. In addition, the size of the tracking area list carried in the returned registration acceptance message is determined based on the first preset threshold and the second preset threshold, which can further ensure the accuracy of the result.

[0094] Based on the above embodiment, in one embodiment, if the registration request message is a registration update request message, the initial registration request message sent by the UE may be received when the network to which the AMF network element belongs is not configured to allow disaster roaming users to access. As shown in Figure 4, the above mobile registration method may further include:

[0095] S401: Receive an initial registration request message sent by a UE.

[0096] When a UE first requests an AMF network element to access the network to which the AMF network element belongs, the UE sends an initial registration request message, and the AMF network element receives the initial registration request message sent by the UE. The UE is a resident UE of the network to which the AMF network element belongs or a UE accessing the network to which the AMF network element belongs through disaster roaming service.

[0097] S402: Send a registration accept message carrying an initial tracking area list to the UE.

[0098] The AMF network element may also receive a registration request message sent by the UE when the network to which it belongs is not configured to allow disaster roaming users to access. However, the AMF network element will only send a registration accept message carrying the initial tracking area list to the UE. The initial tracking area list may be a regular tracking area list.

[0099] S403, when the network to which the AMF network element belongs provides disaster roaming services, receives the registration update request message sent by the UE.

[0100] When the UE is not requesting access to the network to which the AMF network element belongs for the first time, the UE sends a registration update request message. Specifically, at this time, the network is configured to allow disaster roaming users to access, and the AMF network element receives the registration update request message sent again by the UE after the initial registration request message. The registration update request message can be actively sent by the UE when it moves outside the tracking area indicated by the initial tracking area list, or it can be sent by the UE based on a timer.

[0101] S404: Send a registration accept message carrying an expanded or reduced tracking area list to the UE according to the relationship between the preset threshold and the number of received registration request messages.

[0102] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0103] Obtain the number of registration request messages received by the AMF network element at the same time, and the preset threshold value of the number of registration request messages received at the same time. According to the size relationship between the two, determine whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, the AMF network element sends a registration acceptance message carrying the expanded or reduced tracking area list to the UE based on the judgment result.

[0104] Specifically, if the number of received registration request messages exceeds the preset threshold, it means that the AMF network element receives a lot of signaling at the same time, and the network to which the AMF network element belongs may have a signaling load. Therefore, the AMF network element can send an expanded tracking area list to the UE to avoid the UE frequently sending registration request messages to the AMF network element again during the movement process, thereby achieving the purpose of controlling signaling overload. Correspondingly, if the number of received registration request messages does not exceed the preset threshold, the AMF network element can send a reduced tracking area list to the UE to reduce the paging load of the network to which the AMF network element belongs, thereby achieving the purpose of elastic control.

[0105] This embodiment provides a method for the AMF network element to respond to subsequent registration request messages sent by the UE when the UE has accessed the network and the network is configured to allow disaster roaming users to access. The method allocates an expanded or reduced tracking area list, which can reduce the UE's mobile registration update frequency and thus avoid signaling overload.

[0106] Based on the above embodiment, in one embodiment, if the registration request message is an initial registration request message, before receiving the initial registration request message sent by the UE, the network to which the AMF network element belongs has been configured to allow disaster roaming users to access. As shown in Figure 5, the above mobile registration method may further include:

[0107] S501, when the network to which the AMF network element belongs provides disaster roaming services, receives the initial registration request message sent by the UE.

[0108] When a UE first requests access to the network to which the AMF network element belongs from an AMF network element, the UE sends an initial registration request message. Specifically, at this time, the network is configured to allow access by disaster roaming users, and the AMF network element receives the initial registration request message sent by the UE. The UE is a resident UE of the network to which the AMF network element belongs or a UE that accesses the network to which the AMF network element belongs through the disaster roaming service.

[0109] S502: Send a registration accept message carrying an expanded or reduced tracking area list to the UE according to a relationship between a preset threshold and the number of received registration request messages.

[0110] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0111] Obtain the number of registration request messages received by the AMF network element at the same time, and the preset threshold value of the number of registration request messages received at the same time. According to the size relationship between the two, determine whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, the AMF network element sends a registration acceptance message carrying the expanded or reduced tracking area list to the UE based on the judgment result.

[0112] Specifically, if the number of received registration request messages exceeds the preset threshold, it means that the AMF network element receives a lot of signaling at the same time, and the network to which the AMF network element belongs may have a signaling load. Therefore, the AMF network element can send an expanded tracking area list to the UE to avoid the UE frequently sending registration request messages to the AMF network element again during the movement process, thereby achieving the purpose of controlling signaling overload. Correspondingly, if the number of received registration request messages does not exceed the preset threshold, the AMF network element can send a reduced tracking area list to the UE to reduce the paging load of the network to which the AMF network element belongs, thereby achieving the purpose of elastic control.

[0113] It can be understood that only when the network is configured to allow disaster roaming users to access, will a registration acceptance message carrying an expanded or reduced tracking area list be sent to the UE after receiving the registration request message sent by the UE.

[0114] S503: Receive a registration update request message sent by the UE.

[0115] When the UE requests access to the network to which the AMF network element belongs to for the first time, the UE sends a registration update request message. The AMF network element receives the registration update request message sent by the UE again after the initial registration request message. The registration update request message can be actively sent by the UE when it moves outside the tracking area indicated by the initial tracking area list, or it can be sent by the UE based on a timer.

[0116] S504: Send a registration accept message carrying the expanded or reduced tracking area list to the UE according to the relationship between the preset threshold and the number of received registration request messages.

[0117] Obtain the number of registration request messages received by the AMF network element at the same time, and the preset threshold value of the number of registration request messages received at the same time. According to the size relationship between the two, determine whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, the AMF network element sends a registration acceptance message carrying the expanded or reduced tracking area list to the UE based on the judgment result.

[0118] This embodiment provides a method for the AMF network element to respond to the initial registration request message and registration update request message sent by the UE when the UE is not connected to the network and the network has been configured to allow disaster roaming users to access. The expanded or reduced tracking area list is allocated, which can reduce the UE's mobile registration update frequency and thus avoid signaling overload.

[0119] In one embodiment, as shown in FIG6 , a mobile registration method is provided, which is applied to a UE and includes the following steps:

[0120] S601, when the network to which the AMF network element belongs provides disaster roaming service, sends a registration request message to the AMF network element.

[0121] The main functions of the AMF network element include access authorization and authentication, connection management, and mobility management. The disaster roaming service defined by 3GPP allows users of one network to roam to another network when a network fails. The network to which the AMF network element belongs is the other network to which users are allowed to roam. The UE can be a resident UE on the network to which the AMF network element belongs, or a UE that accesses the network to which the AMF network element belongs through the disaster roaming service.

[0122] When the network to which the AMF network element belongs is configured to allow disaster roaming users to access, the UE sends a registration request message to the AMF network element.

[0123] The registration request message includes the initial registration request message and the registration update request message. When the UE requests the AMF network element to access the network to which the AMF network element belongs for the first time, the UE sends the initial registration request message. When the UE requests the AMF network element to access the network to which the AMF network element belongs for the first time, the UE sends the registration update message.

[0124] S602, receiving a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the relationship between a preset threshold and the number of received registration request messages.

[0125] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0126] To determine the location of a UE, the LTE (Long Term Evolution) network coverage area is divided into tracking areas. A tracking area is the basic unit for location updates and paging, and can include one or more cells. A tracking area list records tracking area identifiers. When the network needs to page a UE, it sends a paging message to the UE within the cells within the tracking areas indicated in the tracking area list.

[0127] The AMF obtains the number of Registration Request messages received by the AMF network element at the same time and the preset threshold of the number of Registration Request messages received at the same time. Based on the relationship between the two, it determines whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, based on the judgment result, the AMF network element sends a Registration Accept message carrying the expanded or reduced tracking area list to the UE. Correspondingly, the UE receives the Registration Accept message carrying the expanded or reduced tracking area list sent by the AMF network element.

[0128] It is understandable that if the number of received registration request messages exceeds the preset threshold, it means that the AMF network element receives a lot of signaling at the same time, and the network to which the AMF network element belongs may have a signaling load. Therefore, the AMF network element can send an expanded tracking area list to the UE to avoid the UE frequently sending registration request messages to the AMF network element again during the movement process, thereby achieving the purpose of controlling signaling overload. Correspondingly, if the number of received registration request messages does not exceed the preset threshold, the AMF network element can send a reduced tracking area list to the UE to reduce the paging load of the network to which the AMF network element belongs, thereby achieving the purpose of elastic control.

[0129] The AMF network element can also receive the registration request message sent by the UE when the network to which it belongs is not configured to allow disaster roaming users to access. However, the AMF network element will only send a registration acceptance message carrying the initial tracking area list to the UE. Only when the network to which it belongs is configured to allow disaster roaming users to access, will it send a registration acceptance message carrying the expanded or reduced tracking area list to the UE after receiving the registration request message sent by the UE.

[0130] In the above solution, when the network to which the AMF network element belongs provides disaster roaming services, the UE sends a registration request message to the AMF network element, and then the AMF network element sends a registration accept message carrying an expanded or reduced tracking area list to the UE based on the relationship between the preset threshold and the number of received registration request messages. In this embodiment, the AMF network element returns a tracking area list with updated coverage, i.e., an expanded or reduced tracking area list, to the UE that sent the registration request message based on the number of received registration request messages, so as to reduce the UE's mobile registration update frequency, thereby avoiding signaling overload.

[0131] On the basis of the above embodiment, in one embodiment, if the registration request message is a registration update request message, the initial registration request message is sent by the UE when the network to which the AMF network element belongs is not configured to allow disaster roaming users to access. As shown in FIG7 , the above mobile registration method may further include:

[0132] S701, send an initial registration request message to the AMF network element.

[0133] When a UE first requests access to the network to which the AMF network element belongs, the UE sends an initial registration request message. The UE is a resident UE of the network to which the AMF network element belongs, or a UE accessing the network to which the AMF network element belongs through disaster roaming service.

[0134] S702, receive the registration acceptance message carrying the initial tracking area list sent by the AMF network element.

[0135] If the network to which the AMF network element belongs is not configured to allow disaster roaming users to access, the UE may also send a registration request message. However, the AMF network element will only send a registration accept message carrying the initial tracking area list to the UE. The initial tracking area list may be a regular tracking area list.

[0136] S703, when the network to which the AMF network element belongs provides disaster roaming service, sends a registration update request message to the AMF network element.

[0137] In the case where the UE is not requesting access to the network to which the AMF network element belongs for the first time, the UE sends a registration update request message. Specifically, in this case, the network is configured to allow disaster roaming users to access, and the UE sends a registration update request message again after the initial registration request message.

[0138] In an optional embodiment, when the network to which the AMF network element belongs provides disaster roaming services, if the UE moves outside the tracking area indicated by the initial tracking area list, the UE sends a registration update request message to the AMF network element. For example, when the UE enters a new tracking area and finds that the identifier of the current tracking area is not in the initial tracking area list, the UE actively initiates the mobile registration process and sends a registration update request message to the AMF network element.

[0139] In an optional embodiment, when the network to which the AMF network element belongs provides disaster roaming services, if the timer exceeds the timer duration, the UE sends a registration update request message to the AMF network element. The timer can be the core network T3412 timer, that is, the mobile registration period timer. Before this, the UE needs to initialize the timer. Further, when the timer expires, the UE actively initiates the mobile registration process and sends a registration update request message to the AMF network element.

[0140] S704, receiving the registration acceptance message carrying the expanded or reduced tracking area list sent by the AMF network element based on the size relationship between the preset threshold and the number of received registration request messages.

[0141] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0142] The AMF obtains the number of Registration Request messages received by the AMF network element at the same time and the preset threshold of the number of Registration Request messages received at the same time. Based on the relationship between the two, it determines whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, based on the judgment result, the AMF network element sends a Registration Accept message carrying the expanded or reduced tracking area list to the UE. Correspondingly, the UE receives the Registration Accept message carrying the expanded or reduced tracking area list sent by the AMF network element.

[0143] It is understandable that if the number of received registration request messages exceeds the preset threshold, it means that the AMF network element receives a lot of signaling at the same time, and the network to which the AMF network element belongs may have a signaling load. Therefore, the AMF network element can send an expanded tracking area list to the UE to avoid the UE frequently sending registration request messages to the AMF network element again during the movement process, thereby achieving the purpose of controlling signaling overload. Correspondingly, if the number of received registration request messages does not exceed the preset threshold, the AMF network element can send a reduced tracking area list to the UE to reduce the paging load of the network to which the AMF network element belongs, thereby achieving the purpose of elastic control.

[0144] This embodiment provides a method for the AMF network element to respond to subsequent registration request messages sent by the UE when the UE has accessed the network and the network is configured to allow disaster roaming users to access. The method allocates an expanded or reduced tracking area list, which can reduce the UE's mobile registration update frequency and thus avoid signaling overload.

[0145] Based on the above embodiment, in one embodiment, if the registration request message is an initial registration request message, before receiving the initial registration request message sent by the UE, the network to which the AMF network element belongs has been configured to allow disaster roaming users to access. As shown in Figure 8, the above mobile registration method may further include:

[0146] S801, when the network to which the AMF network element belongs provides disaster roaming service, sends an initial registration request message to the AMF network element.

[0147] When a UE first requests access to the network to which the AMF network element belongs, the UE sends an initial registration request message. Specifically, at this time, the network is configured to allow disaster roaming users to access, and the UE is a resident UE of the network to which the AMF network element belongs or a UE accessing the network to which the AMF network element belongs through the disaster roaming service.

[0148] When the network to which it belongs is configured to allow disaster roaming users to access, the AMF network element receives the registration request message sent by the UE.

[0149] S802, receiving a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the relationship between a preset threshold and the number of received registration request messages.

[0150] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0151] The AMF obtains the number of Registration Request messages received by the AMF network element at the same time and the preset threshold of the number of Registration Request messages received at the same time. Based on the relationship between the two, it determines whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, based on the judgment result, the AMF network element sends a Registration Accept message carrying the expanded or reduced tracking area list to the UE. Correspondingly, the UE receives the Registration Accept message carrying the expanded or reduced tracking area list sent by the AMF network element.

[0152] Specifically, if the number of received registration request messages exceeds the preset threshold, it means that the AMF network element receives a lot of signaling at the same time, and the network to which the AMF network element belongs may have a signaling load. Therefore, the AMF network element can send an expanded tracking area list to the UE to avoid the UE frequently sending registration request messages to the AMF network element again during the movement process, thereby achieving the purpose of controlling signaling overload. Correspondingly, if the number of received registration request messages does not exceed the preset threshold, the AMF network element can send a reduced tracking area list to the UE to reduce the paging load of the network to which the AMF network element belongs, thereby achieving the purpose of elastic control.

[0153] It can be understood that only when the network is configured to allow disaster roaming users to access, will a registration acceptance message carrying an expanded or reduced tracking area list be sent to the UE after receiving the registration request message sent by the UE.

[0154] S803, send a registration update request message to the AMF network element.

[0155] When it is not the first time that the UE requests the AMF network element to access the network to which the AMF network element belongs, the UE sends a registration update message.

[0156] In an optional embodiment, when the network to which the AMF network element belongs provides disaster roaming services, if the UE moves outside the tracking area indicated by the initial tracking area list, the UE sends a registration update request message to the AMF network element. For example, when the UE enters a new tracking area and finds that the identifier of the current tracking area is not in the initial tracking area list, the UE actively initiates the mobile registration process and sends a registration update request message to the AMF network element.

[0157] In an optional embodiment, when the network to which the AMF network element belongs provides disaster roaming services, if the timer exceeds the timer duration, the UE sends a registration update request message to the AMF network element. The timer can be the core network T3412 timer, that is, the mobile registration period timer. Before this, the UE needs to initialize the timer. Further, when the timer expires, the UE actively initiates the mobile registration process and sends a registration update request message to the AMF network element.

[0158] S804, receiving a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the relationship between a preset threshold and the number of received registration request messages.

[0159] The preset threshold is the threshold of the number of registration request messages received by the AMF network element at the same time. The threshold can be set manually, and this embodiment does not limit this.

[0160] The AMF obtains the number of Registration Request messages received by the AMF network element at the same time and the preset threshold of the number of Registration Request messages received at the same time. Based on the relationship between the two, it determines whether an expanded tracking area list or a reduced tracking area list needs to be sent. Then, based on the judgment result, the AMF network element sends a Registration Accept message carrying the expanded or reduced tracking area list to the UE. Correspondingly, the UE receives the Registration Accept message carrying the expanded or reduced tracking area list sent by the AMF network element.

[0161] This embodiment provides a method for the AMF network element to respond to the initial registration request message and registration update request message sent by the UE when the UE is not connected to the network and the network has been configured to allow disaster roaming users to access. The expanded or reduced tracking area list is allocated, which can reduce the UE's mobile registration update frequency and thus avoid signaling overload.

[0162] In one embodiment, an optional example of a mobile registration method is provided, as shown in FIG9 . The specific process is as follows:

[0163] S901, the UE sends an initial registration request message to the AMF network element.

[0164] S902: The AMF network element sends a registration accept message carrying the initial tracking area list to the UE.

[0165] S903, the network to which the AMF network element belongs is configured as a disaster recovery network.

[0166] S904, the AMF network element predicts or detects that the received registration request message (initial registration request message and registration update request message) is higher than the threshold.

[0167] S905, the UE sends a registration update request message to the AMF network element.

[0168] S906: The AMF network element sends a registration accept message carrying the expanded tracking area list to the UE.

[0169] S907, the AMF network element predicts or detects that the received registration request message (initial registration request message and registration update request message) is lower than the threshold.

[0170] S908, the UE sends a registration update request message to the AMF network element.

[0171] S909: The AMF network element sends a registration accept message carrying the reduced tracking area list to the UE.

[0172] In one embodiment, an optional example of a mobile registration method is provided, as shown in FIG10 . The specific process is as follows:

[0173] S1001, the network to which the AMF network element belongs is configured as a disaster recovery network.

[0174] S1002, the AMF network element predicts or detects that the received registration request message (initial registration request message and registration update request message) is higher than the threshold.

[0175] S1003, the UE sends an initial registration request message to the AMF network element.

[0176] S1004: The AMF network element sends a registration acceptance message carrying the expanded tracking area list to the UE.

[0177] S1005, the AMF network element predicts or detects that the received registration request message (initial registration request message and registration update request message) is lower than the threshold.

[0178] S1006, the UE sends a registration update request message to the AMF network element.

[0179] S1007, the AMF network element sends a registration accept message carrying the reduced tracking area list to the UE.

[0180] The specific process of the above steps can be found in the description of the above method embodiment. The implementation principles and technical effects are similar and will not be repeated here.

[0181] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0182] Based on the same inventive concept, the embodiments of the present application further provide a mobile registration device for implementing the mobile registration method involved above. The implementation solution provided by the device is similar to the implementation solution described in the above method. Therefore, the specific limitations of one or more mobile registration device embodiments provided below can be referred to the limitations of the mobile registration method above and will not be repeated here.

[0183] In one embodiment, as shown in FIG11 , a mobile registration device 1 is provided, comprising: a first receiving module 10 and a first sending module 20 , wherein:

[0184] The first receiving module 10 is used to receive a registration request message sent by the UE when the network to which the AMF network element belongs provides disaster roaming services.

[0185] The first sending module 20 is configured to send a registration accept message carrying an expanded or reduced tracking area list to the UE according to a relationship between a preset threshold and the number of received registration request messages.

[0186] In one embodiment, the above-mentioned first sending module 20 is specifically used to send a registration acceptance message carrying an expanded tracking area list to the UE if the number of registration request messages received at the current moment or in the future is greater than a first preset threshold; if the number of registration request messages received at the current moment or in the future is less than a second preset threshold, send a registration acceptance message carrying a reduced tracking area list to the UE.

[0187] In one embodiment, the registration request message includes an initial registration request message and a registration update request message.

[0188] In one embodiment, based on FIG11 , as shown in FIG12 , the mobile registration device 1 may further include:

[0189] The third receiving module 30 is configured to receive an initial registration request message sent by the UE.

[0190] The third sending module 40 is configured to send a registration acceptance message carrying an initial tracking area list to the UE. In one embodiment, as shown in FIG13 , a mobile registration device 2 is provided, comprising: a second sending module 50 and a second receiving module 60, wherein:

[0191] The second sending module 50 is used to send a registration request message to the AMF network element when the network to which the AMF network element belongs provides disaster roaming services.

[0192] The second receiving module 60 is used to receive a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the size relationship between a preset threshold and the number of received registration request messages.

[0193] In one embodiment, the registration request message includes an initial registration request message and a registration update request message.

[0194] In one embodiment, based on FIG. 13 , as shown in FIG. 14 , the mobile registration device 2 may further include:

[0195] The fourth sending module 70 is used to send an initial registration request message to the AMF network element.

[0196] The fourth receiving module 80 is used to receive a registration acceptance message carrying an initial tracking area list sent by the AMF network element.

[0197] In one embodiment, if the registration request message is a registration update request message, the above-mentioned second sending module 50 is specifically used to send a registration update request message to the AMF network element if the network to which the AMF network element belongs provides disaster roaming services and the device moves outside the tracking area indicated by the initial tracking area list.

[0198] In one embodiment, the mobile registration device 2 may further include:

[0199] The initialization module is used to initialize the timer.

[0200] If the registration request message is a registration update request message, the above-mentioned second sending module 50 is specifically used to send a registration update request message to the AMF network element if the timer timing exceeds the timing duration when the network to which the AMF network element belongs provides disaster roaming services.

[0201] Each module in the mobile registration device can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0202] In one embodiment, a communication device is provided, comprising a transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program. The processor of the communication device is configured to provide computing and control capabilities, and when the processor executes the computer program, the steps of each of the above-described method embodiments are implemented. The memory of the communication device comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the communication device is configured to communicate with an external terminal via a network connection.

[0203] In one embodiment, a communication device is provided, including a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program; the receiver is used to receive a registration request message sent by a UE when a network to which an AMF network element belongs provides disaster roaming service; the transmitter is used to send a registration acceptance message carrying an expanded or reduced tracking area list to the UE based on the size relationship between a preset threshold and the number of received registration request messages.

[0204] In one embodiment, a communication device is provided, including a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program; the transmitter is used to send a registration request message to an AMF network element when the network to which the AMF network element belongs provides disaster roaming services; the receiver is used to receive a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the size relationship between a preset threshold and the number of received registration request messages.

[0205] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps of the mobile registration method when executing the computer program.

[0206] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the mobile registration method described above are implemented.

[0207] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above mobile registration method when executed by a processor.

[0208] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0209] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0210] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A mobile registration method, applied to an access and mobility management function AMF network element, the method comprising: In the case where the network to which the AMF network element belongs provides disaster roaming services, receiving a registration request message sent by the user equipment UE; According to the relationship between the preset threshold and the number of received registration request messages, a registration accept message carrying an expanded or reduced tracking area list is sent to the UE.

2. The method according to claim 1, wherein the sending a registration accept message carrying an expanded or reduced tracking area list to the UE according to the relationship between the preset threshold and the number of received registration request messages comprises: If the number of registration request messages received at the current time or in the future is greater than the first preset threshold, sending a registration accept message carrying the expanded tracking area list to the UE; If the number of registration request messages received at the current moment or in the future is less than the second preset threshold, a registration accept message carrying a reduced tracking area list is sent to the UE.

3. The method according to claim 2, wherein the registration request message comprises an initial registration request message and a registration update request message.

4. The method according to claim 3, wherein if the registration request message is a registration update request message, then when the network to which the AMF network element belongs provides disaster roaming services, before receiving the registration request message sent by the user equipment UE, the method further comprises: Receiving an initial registration request message sent by the UE; A registration accept message carrying an initial tracking area list is sent to the UE.

5. The method according to claim 3, wherein if the registration request message is an initial registration request message, after sending a registration accept message carrying an expanded or reduced tracking area list to the UE, the method further comprises: Receiving registration update request information sent by UE; Again, according to the relationship between the preset threshold and the number of received registration request messages, a registration accept message carrying the expanded or reduced tracking area list is sent to the UE.

6. A mobile registration method, applied to a UE, the method comprising: In the case where the network to which the AMF network element belongs provides disaster roaming services, sending a registration request message to the AMF network element; Receive the registration acceptance message carrying the expanded or reduced tracking area list sent by the AMF network element based on the size relationship between the preset threshold and the number of received registration request messages.

7. The method according to claim 6, wherein the registration request message comprises an initial registration request message and a registration update request message.

8. The method according to claim 7, wherein if the registration request message is a registration update request message, then when the network to which the AMF network element belongs provides disaster roaming services, before sending the registration request message to the AMF network element, the method further comprises: Send an initial registration request message to the AMF network element; Receive a registration acceptance message carrying an initial tracking area list sent by the AMF network element.

9. The method according to claim 8, wherein if the registration request message is a registration update request message, then when the network to which the AMF network element belongs provides a disaster roaming service, sending the registration request message to the AMF network element comprises: In the case that the network to which the AMF network element belongs provides disaster roaming services, if the network moves outside the tracking area indicated by the initial tracking area list, a registration update request message is sent to the AMF network element.

10. The method according to claim 8, wherein after receiving the registration acceptance message carrying the initial tracking area list sent by the AMF network element, the method further comprises: Initialize the timer; If the registration request message is a registration update request message, then in the case where the network to which the AMF network element belongs provides a disaster roaming service, sending a registration request message to the AMF network element includes: In the case that the network to which the AMF network element belongs provides disaster roaming services, if the timer exceeds the timing duration, a registration update request message is sent to the AMF network element.

11. According to the method of claim 7, if the registration request message is an initial registration request message, after receiving the registration acceptance message sent by the AMF network element carrying the expanded or reduced tracking area list, the method further comprises: Sending a registration update request message to the AMF network element; The AMF network element receives a registration acceptance message carrying an expanded or reduced tracking area list, which is sent again based on the relationship between the preset threshold and the number of received registration request messages.

12. A mobile registration device, configured in an AMF network element, comprising: A first receiving module is used to receive a registration request message sent by the UE when the network to which the AMF network element belongs provides a disaster roaming service; The first sending module is used to send a registration acceptance message carrying an expanded or reduced tracking area list to the UE according to the relationship between a preset threshold and the number of received registration request messages.

13. A mobile registration device, configured in a UE, comprising: A second sending module is used to send a registration request message to the AMF network element when the network to which the AMF network element belongs provides disaster roaming services; The second receiving module is used to receive a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on the relationship between a preset threshold and the number of received registration request messages.

14. A communication device comprising: a transmitter, a receiver, a processor and a memory, the memory storing a computer program; The receiver is used to receive a registration request message sent by the UE when the network to which the AMF network element belongs provides a disaster roaming service; The transmitter is used to send a registration acceptance message carrying an expanded or reduced tracking area list to the UE according to a size relationship between a preset threshold and the number of received registration request messages.

15. A communication device comprising: a transmitter, a receiver, a processor and a memory, the memory storing a computer program; The transmitter is used to send a registration request message to the AMF network element when the network to which the AMF network element belongs provides a disaster roaming service; The receiver is used to receive a registration acceptance message carrying an expanded or reduced tracking area list sent by the AMF network element based on a size relationship between a preset threshold and the number of received registration request messages.

16. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented.

17. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented.

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