WO2019134649A1

WO2019134649A1 - Implementation method and apparatus for control-plane resource migration, and network functional entity

Info

Publication number: WO2019134649A1
Application number: PCT/CN2019/070098
Authority: WO
Inventors: 唐伟杰; 李志军
Original assignee: 中兴通讯股份有限公司
Priority date: 2018-01-03
Filing date: 2019-01-02
Publication date: 2019-07-11
Also published as: CN109995844B; CN109995844A

Abstract

An implementation method and apparatus for control-plane resource migration, and a network functional entity. The method comprises: a network function repository function (NRF) determining to migrate a user control plane resource of a first network functional entity (NF); the NRF choosing a second NF of the same type as the first NF; the NRF sending a user control plane migration migration request to the second NF, wherein the user control plane migration request carries address information of the first NF and identification information of a user to be migrated.

Description

Method, device and network functional entity for implementing control plane resource migration

The present application claims priority to Chinese Patent Application No. 201810004932.1, filed on Jan. 3, 2011, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to the field of mobile communications, for example, a method, an apparatus, and a network function entity for implementing control plane resource migration.

Background technique

Figure 1 is a schematic diagram of the overall architecture of the 5G (fifth generation communication system). As shown in Figure 1, the 5G architecture mainly includes: Access Management Function (AMF), Session Management Function (SMF). ), User Plane Function (UPF), Unified Data Management (UDM), Policy Control Function (PCF), Network Function Repo sitory Function , NRF) and so on.

The user plane is connected to the user equipment (User Equipment, UE) to the radio access network (RAN) to the UPF, the connection of the control plane is the UE to the RAN to the AMF to the SMF, and the SMF is selected by the AMF. The media side is a separate architecture, and the UPF is selected and managed by the SMF.

Figure 2 is a schematic diagram of a network function entity (NF) discovery process. The NF server registers with the NRF. When the NF finder needs to select another NF service, it carries location information, slice information, and other service parameters to the NRF. The Discovery request, the NRF selects the eligible NF return response message to the finder according to the carried parameters, the UDM subscription information, the current policy and load, and other related information, and the finder initiates the relevant business process to the selected NF. .

3 is a schematic diagram of a protocol establishment procedure of a protocol data unit (Protocol Data Unit) initiated by a UE. During a PDU session establishment process, the AMF selects an SMF, and then initiates a session establishment to the SMF in the selected PDU, and the SMF selects the UDM to the selected one. The UDM obtains the user subscription information, and the SMF selects the PCF to initiate a request to obtain the user policy control information from the selected PCF. The SMF selects the UPF, initiates a session establishment request to the UPF, and establishes a user plane channel.

Among them, AMF selects SMF, SMF selects UDM and SMF selects PCF. There are two ways to select: local configuration and NRF discovery selection. The usage scenarios of local configuration selection are relatively limited. To request for NRF application discovery request, refer to Figure 2 description.

The above NF selection is selected during the session establishment process, but the migration of the user control plane resources cannot be implemented for the NF that has established the session connection.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the present application provides a method, an apparatus, and a network function entity for implementing control plane resource migration, so as to implement dynamic migration of user control plane resources.

An embodiment of the present application provides a method for implementing control plane resource migration, including: a network function repository function entity NRF determines to migrate a user control plane resource of a first network function entity NF; and the NRF selection is the same as the first NF a second NF of the type; the NRF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The embodiment of the present application further provides a method for implementing control plane resource migration, including: determining, by the third network function entity NF, a user control plane resource that migrates the first NF, and selecting, by the network function repository function entity NRF, the first a second NF of the same type of NF; wherein the third NF is a contiguous NF of the first NF; the third NF sends a user control plane migration request to the second NF, the user control plane migration request Carrying the address information of the first NF and the identification information of the user to be migrated.

The embodiment of the present application further provides a method for implementing control plane resource migration, including: the second network function entity NF receives a user control plane migration request, and the user control plane migration request carries the address information of the first NF and the user to be migrated The second NF obtains the control plane resource information of the user to be migrated according to the identifier information of the user to be migrated; the second NF notifies the neighboring NF of the first NF, and the neighboring NF The address information of the first NF associated with the user to be migrated is updated to the address information of the second NF.

The embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to a network function repository function entity NRF, and includes: a determining module, configured to determine a user control plane resource for migrating the first network function entity NF; and selecting a module a second NF of the same type as the first NF, the sending module is configured to send a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and Identification information of the user to be migrated.

The embodiment of the present application further provides a network function storage library functional entity, including: a processor; a memory configured to store the processor executable instructions; and a transmission device configured to perform information transmission and reception communication according to the control of the processor Wherein the processor is configured to: perform a migration of a user control plane resource of the first NF; select a second NF of the same type as the first NF; and send a user control plane migration request to the second NF The user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to a third NF, and includes: a determining module, configured to determine a user control plane resource for migrating the first NF, and selecting, by using a network function storage function entity NRF a second NF of the same type as the first NF; wherein the third NF is a contiguous NF of the first NF; and a sending module configured to send a user control plane migration request to the second NF, The user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The embodiment of the present application further provides a network function entity, including: a processor; a memory, configured to store the processor executable instructions; and a transmission device configured to perform information transmission and reception communication according to the control of the processor; The processor is configured to: perform a migration of a user control plane resource of the first NF, select a second NF of the same type as the first NF through the network function repository function entity NRF; and send the second NF to the second NF The user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to the second NF, and includes: a receiving module, configured to receive a user control plane migration request, where the user control plane migration request carries the address of the first NF The information and the identification information of the user to be migrated; the obtaining module is configured to acquire the control plane resource information of the user to be migrated according to the identifier information of the user to be migrated; the notification module is configured to notify the neighboring NF of the first NF, Updating address information of the first NF associated with the user to be migrated in the neighboring NF to address information of the second NF.

The embodiment of the present application further provides a network function entity, including: a processor; a memory, configured to store the processor executable instructions; and a transmission device configured to perform information transmission and reception communication according to the control of the processor; The processor is configured to: receive a user control plane migration request, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated; and the to-be-migrated user acquires the to-be-migrated The control plane resource information of the user is migrated; the neighboring NF of the first NF is notified, and the address information of the first NF associated with the user to be migrated in the neighboring NF is updated to the address information of the second NF.

The embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being configured to perform the foregoing implementation method of control plane resource migration.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, which is used together with the embodiments of the present application to explain the technical solutions of the present application, and does not constitute a limitation of the technical solutions of the present application.

1 is a schematic diagram of the overall architecture of a fifth generation communication system (5G);

2 is a schematic diagram of an NF discovery process;

3 is a schematic diagram of a process of establishing a request PDU session initiated by a UE;

4 is a flowchart (NRF trigger) of a method for implementing control plane resource migration according to an embodiment of the present application;

FIG. 5 is a flowchart (applied to NRF) of a method for implementing control plane resource migration according to an embodiment of the present application;

6 is a flowchart (third NF trigger) of a method for implementing control plane resource migration according to an embodiment of the present application;

7 is a flowchart (applied to a third NF) of a method for implementing control plane resource migration according to an embodiment of the present application;

8 is a flowchart (applied to a second NF) of a method for implementing control plane resource migration according to an embodiment of the present application;

9 to FIG. 21 are flowcharts showing a method for implementing control plane resource migration according to an application example of the present application;

FIG. 22 is a schematic diagram of an apparatus for implementing control plane resource migration according to an embodiment of the present application (applied to NRF);

FIG. 23 is a schematic diagram of an apparatus for implementing control plane resource migration according to an embodiment of the present application (applied to a third NF);

FIG. 24 is a schematic diagram of an apparatus for implementing control plane resource migration according to an embodiment of the present application (applied to a second NF).

Detailed ways

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other without conflict.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

For the NF that has established a PDU session connection, the network or its own cause is overloaded (capacity and resource utilization is too high), or a certain NF fails (such as network failure and NF itself failure), or operation and maintenance upgrade, fault isolation, The operation of the operation and maintenance personnel is required to be performed by the operation and maintenance personnel. In other cases, when the user control plane resources are required to be migrated, the embodiment of the present application triggers the control plane resource migration by adjacency NF (NRF or other NF). To achieve dynamic migration of user control plane resources.

As shown in FIG. 4, the NRF triggers the user control plane resource migration, and the user control plane resource of the first NF is migrated to the second NF. The implementation method of the control plane resource migration in the embodiment of the present application includes steps 101 to 105.

In step 101, the NRF determines to migrate the user control plane resources of the first network function entity NF.

The first NF is a control plane related NF, and may be: SMF, AMF, UDM or PCF.

The NRF determines the user control plane resource for migrating the first NF, and may be, but not limited to, the following manner.

In a first mode, the NRF receives the load information sent by the first NF, and determines to migrate all or part of the user control plane resources of the first NF according to the load information.

The NRF may receive load information sent to the at least one NF timing, determine the first NF overload according to the load information, and determine to migrate all or part of the user control plane resources of the first NF. The load information may include: capacity information and resource utilization information of the NF, and address information of the NF and identification information of the user in the NF.

Manner 2: The NRF receives the report information sent by the neighboring NF of the first NF, and determines to migrate all or part of the user control plane resources of the first NF according to the report information.

The neighboring NF of the first NF monitors the first NF, and when the first NF has a link failure or an overload condition, the report is reported to the NRF, and the reporting information may include: the status of the first NF. For example, fault, unreachable or overloaded, and slice information and location information of the first NF. The slice information is information of a network slice, and may include a network slice selection assistance information (NSSAI) and a single network slice selection assistance information (S-NSSAI). ).

The adjacency NF refers to an NF adjacent to the first NF and having a communication connection relationship. For example, if the first NF is an SMF, the AMF, NRF, PCF, UDM, and UPF are adjacent NFs.

It should be noted that although the NRF is the neighboring NF of the first NF, since the neighboring NF of the first NF is reported to the NRF, the neighboring NF of the first NF herein does not include the NRF by default. Also similar, no longer pointed out one by one.

In a third manner, the NRF monitors the connected NF, and determines to migrate all or part of the user control plane resources of the first NF according to the monitoring information.

The NRF actively monitors all NFs, and when the link is found to be faulty or overloaded, the migration object is determined.

Manner 4: The NRF receives the migration instruction of the network management, and determines to migrate all or part of the user control plane resources of the first NF.

For example, the operation and maintenance personnel determine that the user control plane migration is required, and the migration instruction is sent by the network management, and the NRF performs migration according to the received migration instruction.

In step 102, the NRF selects a second NF of the same type as the first NF.

The NRF may select a second NF of the same type as the first NF according to the load information, the location information, and the slice information of the first NF.

For example, the NRF may select a NF of the same type as the first NF as a second NF according to a policy.

The first NF may be referred to as a source NF, and the second NF may be referred to as a target NF.

In step 103, the NRF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The address information of the first NF may be represented by one of the following: a Fully Qualified Domain Name (FQDN), a Uniform Resource Locator (URL), and an Internet Protocol (IP) address. .

When the address information of the NF is identified by the FQDN or the URL, the correspondence table of the FQDN/URL and the IP address may be set. When the IP address of the NF is changed, for example, the first NF is switched to the second NF, and the corresponding IP address is also from the first The IP address of the NF is switched to the IP address of the second NF, and the FQDN/URL may not be changed, and only the IP address in the correspondence table of the FQDN/URL and the IP address may be changed.

The user to be migrated may be in the form of a user set (UE Set), and the identifier information of the user to be migrated may be identification information of a user group (UE Set), for example, a group ID (Group ID) and an international mobile subscriber identity code. (International Mobile Subscriber Identification Number, IMSI) A representation of one of the SMF IDs. If the SMF ID is used, it means that all users belonging to this SMF need to switch.

In step 104, the second NF acquires control plane resource information of the user to be migrated.

In an embodiment, the second NF may send a request for acquiring a user information to a structured data storage network (SDSF), where the request for acquiring the user information carries the identification information of the user to be migrated. The second NF receives the user information response of the SDSF, and the acquiring user information is responsive to carrying the control plane resource information of the user to be migrated.

The control plane resource information of the user to be migrated may be different for different NFs, and the control plane resource information of the user to be migrated may include, but is not limited to, user context information. For example, in an embodiment, the control plane resource information of the user to be migrated includes: user context information and PDU session information. In another embodiment, the control plane resource information of the user to be migrated includes: user context information, PDU session information, and quality of service (QoS) and flow control information.

The user context information may include: a user identifier, a user group (UE Set) identifier, user location information, and user subscription information. The PDU session information may include: a PDU session identifier, an access mode (sscMode), a UE address, a Data Network Access Identifier (DNAI), neighbor node information, a slice information, and a data network name (Data Network Name). , DNN) and so on. The Qos and Flow control information may include: Qos, QoS Flow Identifier (QFI), and charging related information.

In step 105, the second NF notifies the neighboring NF of the first NF, and updates the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF.

The second NF may be, but is not limited to, obtaining address information of the neighboring NF according to the control plane resource information (for example, user context information), thereby notifying the neighboring NF.

Wherein, as described above, if the address information adopts an IP address, the IP address of the first NF is updated to the IP address of the second NF. That is, the neighboring NF of the first NF is notified to update the IP address of the first NF associated with the user to be migrated to the IP address of the second NF.

If the address information adopts the FQDN or the URL, the FQDN/URL and the IP address corresponding to the FQDN or the URL of the first NF in the correspondence table of the IP address are updated to the IP address of the second NF. That is, the neighboring NF of the first NF is notified to update the IP address corresponding to the FQDN or the URL of the first NF associated with the user to be migrated to the IP address of the second NF. In this implementation manner, a correspondence table between the FQDN/URL and the IP address is established. If the IP address needs to be updated, only the corresponding table needs to be updated, which is more convenient in practical application.

After step 105, step 106, step 107 and step 108 may also be included.

In step 106, the second NF sends a user control plane migration response to the NRF, and the user control plane migration response carries information that the user control plane migration is completed.

The information that the user control plane migration is completed indicates that all or part of the user control plane resources of the first NF have migrated to the second NF.

In step 107, the NRF sends a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identification information of the migrated user.

The user to be migrated becomes a migrated user when the user control plane migration is completed.

In step 108, the first NF deletes information of the migrated user.

The first NF deletes the information of the locally migrated user and releases the local resource, which can improve the overload situation, realize the load of the balanced control plane entity, and optimize the control plane network deployment.

As another implementation manner, after the step 105, the second NF may send a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address of the second NF. Information and identification information of the migrated user; the first NF deletes information of the migrated user.

In the above manner, the NRF may connect a part of users that can be migrated in the overloaded first NF and related PDU sessions, migrate to the newly selected second NF, and then release the part of the overloaded first NF. User information to achieve non-destructive migration of the control surface of the accessed user. It can optimize network resources in real time, improve network resource utilization, and ensure the reliability of user services and improve user experience.

For the NRF, as shown in FIG. 5, a method for implementing control plane resource migration provided by the embodiment of the present application includes

steps

201, 202, and 203.

In step 201, the NRF determines to migrate the user control plane resources of the first network function entity NF.

The first NF is a control plane related NF, and may be: SMF, AMF, UDM or PCF.

In step 202, the NRF selects a second NF of the same type as the first NF.

In step 203, the NRF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The address information of the first NF may be represented by one of the following: an FQDN, a URL, and an IP address.

The user to be migrated may be in the form of a user group (UE Set), and the identifier information of the user to be migrated may be the identification information of the user group (UE Set), for example, a group ID (Group ID), an IMSI segment, and an SMF ID. One of the representations. If the SMF ID is used, it means that all users belonging to this SMF need to switch.

In an embodiment, after the NRF sends a user control plane migration request to the second NF, the method further includes: the NRF receiving a user control plane migration response sent by the second NF, the user control plane migration response And carrying the user control plane migration completion information, the NRF sends a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user .

In the embodiment of the present application, the non-destructive migration of the user control plane resources is triggered by the NRF. If the NF of the PDU session connection is established, if the overload occurs, the load of the control plane entity can be balanced and the resource utilization of the network can be improved. Rate, optimize network resources in real time. In addition, if the operation and maintenance upgrade, the fault isolation, the manual expansion and the like occur, the continuity and reliability of the user service can be ensured through the foregoing embodiment, and the user experience is improved.

As shown in FIG. 6 , the third NF triggers the user control plane resource migration, and the user control plane resource of the first NF is migrated to the second NF. The implementation method of the control plane resource migration in the embodiment of the present application includes steps 301 to 304 . .

In step 301, the third NF determines to migrate the user control plane resource of the first NF, and selects a second NF of the same type as the first NF by using the NRF; wherein the third NF is the adjacency of the first NF. NF.

The first NF and the third NF are control plane related NFs, which may be: SMF, AMF, UDM or PCF. The third NF is a different type of NF of the first NF. For example, when the first NF is an SMF, the third NF may be an AMF, a UDM, or a PCF; when the first NF is an AMF, the The third NF may be an SMF, a UDM or a PCF; when the first NF is a UDM, the third NF may be an AMF or an SMF; when the first NF is a PCF, the third NF may be an SMF or an AMF.

The third NF determines that the user control plane resource for migrating the first NF may include one of the following manners.

In a first mode, the third NF receives the load information sent by the first NF, and determines to migrate all or part of the user control plane resources of the first NF according to the load information.

The third NF may receive load information sent to the at least one NF timing, determine the first NF overload according to the load information, and determine to migrate all or part of the user control plane resources of the first NF. The load information may include: capacity information and resource utilization information of the NF, and address information of the NF and identification information of the user in the NF.

In a second manner, the third NF monitors the first NF, and determines to migrate all or part of the user control plane resources of the first NF according to the monitoring information.

The third NF actively monitors the first NF, and when it is found that the link is faulty or overloaded, it is determined to migrate all or part of the user control plane resources of the first NF.

Manner 3: The third NF receives the migration instruction of the network management, and determines to migrate all or part of the user control plane resources of the first NF.

The selecting, by the NRF, the second NF of the same type as the first NF may include: the third NF initiating a request for discovering the second NF to the NRF; and the third NF receiving the response of the NRF, The response carries address information of the second NF selected by the NRF.

The address information of the second NF may be an IP address of the second NF.

In step 302, the third NF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

In step 303, the second NF acquires control plane resource information of the user to be migrated.

In an embodiment, the second NF may send a request for acquiring user information to the SDSF, where the acquiring user information request carries the identification information of the user to be migrated; and the second NF receives the acquiring user of the SDSF. In response to the information, the acquiring user information response carries the association information of the user to be migrated and the first NF.

The control plane resource information of the user to be migrated may be different for different NFs, and the control plane resource information of the user to be migrated may include, but is not limited to, user context information. For example, in an embodiment, the control plane resource information of the user to be migrated includes: user context information and PDU session information. In another embodiment, the control plane resource information of the user to be migrated includes: user context information, PDU session information, and Qos and Flow control information.

In step 304, the second NF notifies the neighboring NF of the first NF, and updates the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF.

Wherein, as described above, if the address information adopts an IP address, the IP address of the first NF is updated to the IP address of the second NF. That is, the neighboring NF of the first NF is notified to update the IP address of the first NF associated with the user to be migrated to the IP address of the second NF;

After step 304, step 305 and step 306 may also be included.

In step 305, the second NF sends a user control plane migration completion notification to the first NF, and carries the address information of the second NF and the identifier information of the migrated user.

In step 306, the first NF deletes information of the migrated user.

As another implementation manner, after the step 304, the second NF may further send a user control plane migration response to the third NF, where the user control plane migration response carries information that the user control plane migration is completed; The third NF sends the user control plane migration completion notification to the first NF; the first NF deletes information of the migrated user.

In the embodiment of the present application, the third NF triggers the non-destructive migration of the user control plane resources of the first NF. For the NF that has established the PDU session connection, if the overload occurs, the load of the control plane entity may be balanced by the foregoing manner. Improve network resource utilization and optimize network resources in real time. In addition, if the operation and maintenance upgrade, the fault isolation, the manual expansion and the like occur, the continuity and reliability of the user service can be ensured through the foregoing embodiment, and the user experience is improved.

For the third NF, as shown in FIG. 7, a method for implementing control plane resource migration provided by the embodiment of the present application includes

steps

401 and 402.

In step 401, the third NF determines to migrate the user control plane resource of the first NF, and selects a second NF of the same type as the first NF by using the NRF; wherein the third NF is the adjacency of the first NF. NF.

The first NF and the third NF are control plane related NFs, which may be: SMF, AMF, UDM or PCF, and the third NF is a different type of NF of the first NF. For example, when the first NF is an SMF, the third NF may be an AMF, a UDM, or a PCF; when the first NF is an AMF, the third NF may be an SMF, a UDM, or a PCF; when the first NF is a UDM The third NF may be an AMF or an SMF; when the first NF is a PCF, the third NF may be an SMF or an AMF.

The third NF determines that migrating all or part of the user control plane resources of the first NF may include one of the following manners.

In the third manner, the third NF receives the migration instruction of the network management, and determines to migrate all or part of the user control plane resources of the first NF.

The address information of the second NF may be an IP address of the second NF.

In step 402, the third NF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

In an embodiment, after the third NF sends a user control plane migration request to the second NF, the method further includes: the third NF receiving a user control plane migration response sent by the second NF, The user control plane migration response carries information that the user control plane migration is completed; the third NF sends a user control plane migration completion notification to the first NF, and the user control plane migration completion notification carries the second NF Address information and identification information of migrated users.

In the embodiment of the present application, the third NF triggers the user control plane resource of the first NF to perform non-destructive migration. For the first NF that has established the PDU session connection, if an overload occurs, the control plane entity may be equalized by the foregoing manner. Load, improve network resource utilization, and optimize network resources in real time. In addition, if the operation and maintenance upgrade, the fault isolation, the manual expansion and the like occur, the continuity and reliability of the user service can be ensured through the foregoing embodiment, and the user experience is improved.

Referring to FIG. 4 and FIG. 6 , for the second NF, as shown in FIG. 8 , the method for implementing control plane resource migration in the embodiment of the present application includes steps 501 to 503 .

In step 501, the second NF receives a user control plane migration request, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The second NF receives a user control plane migration request sent by the NRF or the third NF.

The first NF and the second NF are control plane related NFs, which may be: SMF, AMF, UDM or PCF.

In step 502, the second NF acquires control plane resource information of the user to be migrated according to the identification information of the user to be migrated.

In an embodiment, the second NF may send a request for acquiring user information to the SDSF, where the acquiring user information request carries the identification information of the user to be migrated; and the second NF receives the acquiring user of the SDSF. In response to the information, the acquiring user information response carries the control plane resource information of the user to be migrated.

The control plane resource information of the user to be migrated may include one of the following: user context information; user context information and PDU session information; user context information, PDU session information, and Qos Flow information.

In step 503, the second NF notifies the neighboring NF of the first NF, and updates the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF.

In an embodiment, the method may include: notifying an adjacency NF of the first NF, updating an IP address of the first NF associated with the user to be migrated in the neighboring NF to an IP address of the second NF, or And notifying the neighboring NF of the first NF, and updating an IP address corresponding to the FQDN or the URL of the first NF associated with the user to be migrated in the neighboring NF to an IP address of the second NF.

In an embodiment, after the step 503, the method further includes: the second NF sends a user control plane migration completion response, where the user control plane migration response carries information that the user control plane migration is completed.

The second NF may send the user control plane migration response to the NRF, and the NRF sends a user control plane migration completion notification to the first NF, so that the first NF deletes the locally migrated user information. The second NF may send the user control plane migration response to the third NF, and send, by the third NF, a user control plane migration completion notification to the first NF, so that the first NF is deleted locally. User information has been migrated. The second NF may also directly send the user control plane migration completion notification to the first NF, so that the first NF deletes the locally migrated user information.

In the embodiment of the present application, the user control plane resource in the first NF is migrated to the second NF by using the second NF, so that the network resource can be optimized in real time, the resource utilization of the network is improved, and the reliability of the user service is also ensured. , improved user experience.

The following is a description of some application examples.

As shown in FIG. 9 , in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. The NRF triggers the dynamic migration of the user control plane resources. The source SMF periodically notifies the NRF of the load usage, and carries the user group UE Set identifier and the node FQDN/URL identifier that can be migrated. The NRF determines that the source SMF is overloaded, according to the location, the slice, Information such as Data Network Access Identifier (DNAI) and other service parameters, and weights, loads, and coverage areas of each SMF, select a target SMF, and select at least one user according to user group information brought by the source SMF. After the migration to the target SMF is completed, the target SMF notifies the peripheral functional entity, and then the target SMF notifies the NRF that the migration is complete, the NRF notifies the source SMF to migrate the user group and the user, and the source SMF locally deletes the related user. Source SMF user control plane resource migration. This example includes steps 900 through 910.

In step 900, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 901, the source SMF reports the load information to the NRF. The load information includes the current load value, the user group UE Set identifier that can be migrated, the node FQDN/URL identifier, the slice information, and the location information.

In step a, the NRF determines whether the source SMF requires user migration, and does not perform processing based on the determination result that the source SMF does not require user migration; and based on the determination result that the source SMF requires user migration, reduces the source SMF load, and performs step 902.

In step 902, the NRF selects a target SMF according to the slice, location, and source SMF load information, and the NRF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The migration user may be a user group UE Set, and the address information of the source SMF may be the FQDN or URL identifier of the node.

In step 903, the target SMF sends a request for acquiring user information to the SDSF, and carries the identification information of the user to be migrated.

In step 904, the SDSF replies to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 905, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 906, the target SMF notifies the UDM to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 907, the target SMF notifies the UPF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 908, the target SMF notifies the AMF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC (Tunnel Endpoint Identifier Control) information of the target SMF, and the AMF is updated. The migration user group corresponds to the address information and TEIDC information of the SMF. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 909, the target SMF replies to the NRF with a user control plane migration response, indicating that the target SMF has established relevant user information and can operate normally.

In step 910, the NRF notifies the source SMF user control plane that the migration is complete, and carries the identification information of the migrated user group and the IP address of the target SMF corresponding to the user group.

In step b, the source SMF locally deletes the user information that has been migrated to the target SMF.

As shown in FIG. 10, in the application example, the first NF and the second NF are taken as the PCF, wherein the first NF is used as the source PCF and the second NF is used as the target PCF. The NRF triggers the dynamic migration of the user control plane resources. The source PCF periodically notifies the NRF of the load usage, and carries the user group UE Set identifier and the node FQDN/URL identifier that can be migrated. The NRF determines that the source PCF is overloaded, according to the location, the slice, and The other service parameters and other information, as well as the weight, load, and coverage area of each PCF, select the target PCF, and select at least one user to migrate to the target PCF according to the user group information brought by the source PCF. The target PCF notifies the neighboring functional entity. The target PCF notifies the NRF that the migration is complete. The NRF notifies the source PCF to migrate the user group and the user. The source PCF deletes the related user locally and implements source PCF user control plane resource migration. This example includes steps 1000 through 1008.

In step 1000, the UE initiates a session establishment request, the session establishment is completed, and the source PCF accesses the user.

In step 1001, the source PCF reports the load information to the NRF, where the information includes the current load value, the user group UE Set identifier that can be migrated, the node FQDN/URL identifier, the slice information, and the location information.

In step a, the NRF determines whether the source PCF requires user migration, and does not perform processing based on the determination result that the source SMF does not require user migration; based on the determination result that the source SMF requires user migration, the source PCF load is reduced, and the step 1002 is performed.

In step 1002, the NRF selects the target PCF according to the slice, the location, and the source PCF load information. The NRF initiates a user control plane migration request to the target PCF, and carries information such as the identity information of the user to be migrated and the address information of the source PCF. The user to be migrated may be a user group UE Set, and the address information of the source PCF may be an FQDN or a URL identifier of the node.

In step 1003, the target PCF sends a request for acquiring a user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1004, the SDSF responds to the target PCF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, the Qos Flow, the PDR, the FAR, and the like, and the control plane resource information related to the user.

In step 1005, the target PCF notifies the SMF to update the PCF node information of the user to be migrated, and carries the PCF IP address corresponding to the user group to be migrated, and the SMF updates the address information of the PCF corresponding to the user group to be migrated. If the address information of the PCF is represented by an IP address, it is directly replaced with the IP address of the target PCF. If the address information of the PCF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the PCF associated with the user group to be migrated is updated to IP address of the target PCF.

In step 1006, the target PCF notifies the AMF to update the PCF node information of the user to be migrated, and carries the PCF IP address corresponding to the user group to be migrated, and the AMF updates the address information of the PCF corresponding to the user group to be migrated. If the address information of the PCF is represented by an IP address, it is directly replaced with the IP address of the target PCF. If the address information of the PCF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the PCF associated with the user group to be migrated is updated to IP address of the target PCF.

In step 1007, the target PCF replies to the NRF with a user control plane migration response, and the target PCF has established relevant user information, which can operate normally.

In step 1008, the NRF notifies the source PCF that the user control plane migration is completed, and carries the identification information of the migrated user group and the IP address of the target PCF corresponding to the user group.

In step b, the source PCF locally deletes the user information that has been migrated to the target PCF.

As shown in FIG. 11 , in the application example, the first NF and the second NF are taken as an example, wherein the first NF is used as the source UDM and the second NF is used as the target UDM. The NRF triggers the dynamic migration of the user control plane resources. The source UDM periodically notifies the NRF of the load usage, and carries the user group UE Set identifier and the node FQDN/URL identifier that can be migrated. The NRF determines that the source UDM is overloaded, according to the location, the slice, and Information such as other service parameters, and the weight, load, and coverage area of each UDM, select the target UDM, and select at least one user to migrate to the target UDM according to the user group information brought by the source UDM. The target UDM notifies the peripheral functional entity. The target UDM notifies the NRF that the migration is complete. The NRF notifies the source UDM to migrate the user group and user, deletes the related user locally, and implements source UDM user control plane resource migration. This example includes steps 1100 through 1108.

In step 1100, the UE initiates a session establishment request, the session establishment is completed, and the source UDM accesses the user.

In step 1101, the source UDM reports the load information to the NRF, where the information includes the current load value, the user group UE Set identifier that can be migrated, the node FQDN/URL identifier, the slice information, and the location information.

In step a, the NRF determines whether the source UDM requires user migration, and does not perform processing based on the determination result that the source SMF does not require user migration; and based on the determination result that the source SMF requires user migration, reduces the source UDM load, and performs step 1102.

In step 1102, the NRF selects the target UDM according to the slice, the location, and the source UDM load information. The NRF initiates a user control plane migration request to the target UDM, and carries information such as the identity information of the user to be migrated and the address information of the source UDM. The user to be migrated may be a user group UE Set, and the address information of the source UDM may be an FQDN or a URL identifier of the node.

In step 1103, the target UDM sends a request for acquiring a user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1104, the SDSF replies to the target UDM user information response, and carries the identification information of the user to be migrated, the user context information, the UD session, and the like, and the control plane resource information related to the user.

In step 1105, the target UDM notifies the SMF to update the UDM node information of the user to be migrated, and carries the UDM IP address corresponding to the user group to be migrated, and the SMF updates the address information of the UDM corresponding to the user group to be migrated. If the address information of the UDM is represented by an IP address, it is directly replaced with the IP address of the target UDM; if the address information of the UDM is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the UDM associated with the user group to be migrated is updated to The IP address of the target UDM.

In step 1106, the target UDM notifies the AMF to update the UDM node information of the user to be migrated, and carries the UDM IP address corresponding to the user group to be migrated, and the AMF updates the address information of the UDM corresponding to the user group to be migrated. If the address information of the UDM is represented by an IP address, it is directly replaced with the IP address of the target UDM; if the address information of the UDM is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the UDM associated with the user group to be migrated is updated to The IP address of the target UDM.

In step 1107, the target UDM replies to the NRF with a user control plane migration response, indicating that the target UDM has established relevant user information and can operate normally.

In step 1108, the NRF notification source UDM user control plane migration is completed, carrying the identification information of the migrated user group, and the IP address of the target UDM corresponding to the user group.

In step b, the source UDM locally deletes the user information that has been migrated to the target UDM.

As shown in FIG. 12, in the application example, the first NF and the second NF are taken as the AMF, wherein the first NF is used as the source AMF and the second NF is used as the target AMF. The NRF triggers the dynamic migration of the user control plane resources. The source AMF periodically notifies the NRF of the load usage, and carries the user group UE Set identifier and the node FQDN/URL identifier that can be migrated. The NRF determines that the source AMF is overloaded, according to the location, the slice, and Information such as other service parameters, and the weight, load, and coverage area of each AMF, select the target AMF, and select at least one user to migrate to the target AMF according to the user group information brought by the source AMF. The target AMF notifies the peripheral functional entity, and then the target AMF notifies the NRF that the migration is completed, the NRF notifies the source AMF to migrate the user group and the user, and the source AMF locally deletes the related user, thereby realizing the source AMF user control plane resource migration. This example includes steps 1200 through 1210.

In step 1200, the UE initiates a session establishment request, the session establishment is completed, and the source AMF accesses the user.

In step 1201, the source AMF reports the load information to the NRF, where the information includes the current load value, the user group UE Set identifier that can be migrated, the node FQDN/URL identifier, the slice information, and the location information.

In step a, the NRF determines whether the source AMF requires user migration, and does not perform processing based on the determination result that the source SMF does not require user migration; and based on the determination result that the source SMF requires user migration, reduces the source SMF load, and performs step 1202.

In step 1202, the NRF selects the target AMF according to the slice, location, and source AMF load information, and the NRF initiates a user control plane migration request to the target AMF, and carries information such as the identity information of the user to be migrated and the address information of the source AMF. The user to be migrated may be a user group UE Set, and the address information of the source AMF may be an FQDN or a URL identifier of the node.

In step 1203, the target AMF sends a request for acquiring a user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1204, the SDSF responds to the target AMF user information response, and carries the AMF and the user-related control plane resource information, such as the identity information of the user to be migrated, the user context information, and the like.

In step 1205, the target AMF notifies the SMF to update the AMF node information of the user to be migrated, and carries the AMF IP address corresponding to the user group to be migrated, and the SMF updates the address information of the AMF corresponding to the user group to be migrated. If the address information of the AMF is represented by an IP address, it is directly replaced with the IP address of the target AMF; if the address information of the AMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the AMF associated with the user group to be migrated is updated to The IP address of the target AMF.

In step 1206, the target AMF notifies the UDM to update the AMF node information of the user to be migrated, and carries the AMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the AMF corresponding to the user group to be migrated. If the address information of the AMF is represented by an IP address, it is directly replaced with the IP address of the target AMF; if the address information of the AMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the AMF associated with the user group to be migrated is updated to The IP address of the target AMF.

In step 1207, the target AMF notifies the PCF to update the AMF node information of the user to be migrated, and carries the AMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the AMF corresponding to the user group to be migrated. If the address information of the AMF is represented by an IP address, it is directly replaced with the IP address of the target AMF; if the address information of the AMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the AMF associated with the user group to be migrated is updated to The IP address of the target AMF.

In step 1208, the target AMF notifies the RAN to update the AMF node information of the user to be migrated, and carries the AMF IP address corresponding to the user group to be migrated, and the RAN updates the address information of the AMF corresponding to the user group to be migrated. If the address information of the AMF is represented by an IP address, it is directly replaced with the IP address of the target AMF; if the address information of the AMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the AMF associated with the user group to be migrated is updated to The IP address of the target AMF.

In step 1209, the target AMF replies to the NRF with a user control plane migration response, indicating that the target AMF has established relevant user information and can operate normally.

In step 1210, the NRF notifies the source AMF user control plane that the migration is complete, and carries the identification information of the migrated user group and the service IP address of the target AMF corresponding to the user group.

In step b, the source AMF locally deletes the user information that has been migrated to the target AMF.

As shown in FIG. 13 , in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The NRF triggers dynamic migration of user control plane resources. The AMF periodically monitors the source SMF. When the source SMF fails or does not respond, the AMF notifies the NRF that the source SMF is unreachable. The NRF is based on location, slice, DNAI, and other service parameters. The information, and the weight, load, and coverage area of each SMF, select the target SMF, and all the users accessing the source SMF are migrated to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity to notify the NRF. After the user control plane is migrated, the NRF informs the source SMF to migrate the user group and user. The source SMF deletes the related user locally and implements source SMF user control plane resource migration. This example includes steps 1300 through 1312.

In step 1300, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 1301, the AMF performs NF detection on the source SMF.

In step a, when the source SMF does not respond or the response times out, or responds but the load is too heavy.

In step 1302, the AMF notifies the NRF that the source SMF is faulty/unreachable, or overloaded, information slice information, location information.

In step 1303, the NRF replies to the source SMF failure/unreachability of the AMF, or an overload response.

In step 1304, the NRF selects the target SMF according to the slice, location, and source SMF load information, and the NRF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1305, the target SMF sends a request for acquiring user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1306, the SDSF replies to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1307, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1308, the target SMF notifies the UDM to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1309, the target SMF notifies the UPF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1310, the target SMF notifies the AMF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF. The AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1311, the target SMF replies to the NRF with a user control plane migration response, and the target SMF has established relevant user information, which can operate normally.

In step 1312, the NRF notification source SMF user control plane migration is completed, carrying the identification information of the migrated user group, and the IP address of the target SMF corresponding to the user group.

As shown in FIG. 14 , in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The NRF triggers the dynamic migration of user control plane resources. The PCF periodically monitors the source SMF. When the source SMF fails or does not respond, the AMF notifies the NRF that the source SMF is unreachable. The NRF is based on location, slice, DNAI, and other service parameters. The information, and the weight, load, and coverage area of each SMF, select the target SMF, and all the users accessing the source SMF are migrated to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity to notify the NRF. After the user control plane is migrated, the NRF informs the source SMF to migrate the user group and user. The source SMF deletes the related user locally and implements source SMF user control plane resource migration. This example includes steps 1400 through 1412.

In step 1400, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 1401, the PCF performs NF detection on the source SMF.

In step 1402, the PCF notifies the NRF that the source SMF is faulty/unreachable, or overloaded, information slice information, location information.

In step 1403, the PCF replies to the source SMF failure/unreachability of the PCF, or an overload response.

In step 1404, the NRF selects the target SMF according to the slice, location, and source SMF load information. The NRF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1405, the target SMF sends a request for acquiring a user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1406, the SDSF responds to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1407, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1408, the target SMF notifies the UDM to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1409, the target SMF notifies the UPF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1410, the target SMF notifies the AMF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF. The AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1411, the target SMF replies to the NRF with a user control plane migration response, indicating that the target SMF has established relevant user information and can operate normally.

In step 1412, the NRF notification source SMF user control plane migration is completed, carrying the identification information of the migrated user group, and the IP address of the target SMF corresponding to the user group.

As shown in FIG. 15 , in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The NRF triggers the dynamic migration of user control plane resources. The UDM periodically monitors the source SMF. When the source SMF fails or does not respond, the UDM notifies the NRF that the source SMF is unreachable. The NRF is based on location, slice, DNAI, and other service parameters. The information, and the weight, load, and coverage area of each SMF, select the target SMF, and all the users accessing the source SMF are migrated to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity to notify the NRF. After the user control plane is migrated, the NRF informs the source SMF to migrate the user group and user. The source SMF deletes the related user locally and implements source SMF user control plane resource migration. This example includes steps 1500 through 1512.

In step 1500, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 1501, the UDM performs NF detection on the source SMF;

In step a. when the source SMF does not respond or the response times out, or responds but the load is too heavy.

In step 1502, the UDM notifies the NRF that the source SMF is faulty/unreachable, or overloaded, information slice information, location information.

In step 1503, the PCF replies to the source SMF failure/unreachability of the UDM, or an overload response.

In step 1504, the NRF selects the target SMF according to the slice, location, and source SMF load information, and the NRF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1505, the target SMF sends a request for acquiring a user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1506, the SDSF replies to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1507, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1508, the target SMF notifies the UDM to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated. The IP address of the target SMF.

In step 1509, the target SMF notifies the UPF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1510, the target SMF notifies the AMF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF. The AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1511, the target SMF replies to the NRF with a user control plane migration response, indicating that the target SMF has established relevant user information and can operate normally.

In step 1512, the NRF notification source SMF user control plane migration is completed, carrying the identification information of the migrated user group, and the IP address of the target SMF corresponding to the user group.

As shown in FIG. 16, in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The NRF triggers the dynamic migration of user control plane resources. The NRF performs state detection on the source SMF. When the NRF detects the source SMF failure, the link is unreachable, or is overloaded, the NRF is based on location, slice, DNAI, and other service parameters. The information, and the weight, load, and coverage area of each SMF, select the target SMF, and all the users accessing the source SMF are migrated to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity, and the notification The NRF user control plane is migrated. The NRF informs the source SMF to migrate the user group and user. The source SMF deletes the related user locally and implements source SMF user control plane resource migration. This example includes steps 1600 through 1611.

In step 1600, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 1601, the NRF performs SMF detection on the source SMF.

In step a, when the source SMF does not respond or the response times out, step 1103 is directly performed.

In step 1602, the source SMF responds to the NRF, and reports load information, slice information, and location information.

In step b, the NRF determines whether a user migration is required according to the load of the source SMF response, and performs step 1603 based on the determination result that the user migration is required.

In step 1603, the NRF selects a target SMF according to the slice, location, and SMF load information, and the NRF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1604, the target SMF sends a request for acquiring user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1605, the SDSF replies to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1606, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1607, the target SMF notifies the UDM to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1608, the target SMF notifies the UPF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1609, the target SMF notifies the AMF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF. The AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1610, the target SMF replies to the NRF with a user control plane migration response, indicating that the target SMF has established relevant user information and can operate normally.

In step 1611, the NRF notification source SMF user control plane migration is completed, carrying the identification information of the migrated user group, and the IP address of the target SMF corresponding to the user group.

In step c, the source SMF locally deletes the user information that has been migrated to the target SMF.

As shown in FIG. 17, in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The NRF triggers the dynamic migration of the user control plane resources. The operation and maintenance personnel need to perform the operations, such as the following operations: operation and maintenance upgrade, fault isolation, and manual expansion. The operation and maintenance personnel deliver the commands to the NRF through the command. Information such as slicing, DNAI and other service parameters, and the weight, load, and coverage area of each SMF, select the target SMF, and migrate all users accessing the source SMF to the target SMF. After the access user migration is completed, the target The SMF notifies the neighboring functional entity to notify the NRF user that the control plane migration is complete. The NRF notifies the source SMF to migrate the user group and the user, and the source SMF locally deletes the related user, thereby realizing the migration of the source SMF user control plane resources. This example includes steps 1700 through 1711.

In step 1700, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step a, when the operation and maintenance personnel need to perform operations, for example, the following operations: operation and maintenance upgrade, fault isolation, and manual expansion and expansion.

In step 1701, the network management platform sends a user control plane migration command to the NRF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be the user group UE Set, and the address information of the source SMF. Can be the FQDN or URL identifier of the node.

In step 1702, the NRF selects a target SMF according to the slice, the location, and the source SMF load information, and the NRF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1703, the target SMF sends a request for acquiring a user information to the SDSF, and carries the identification information of the user to be migrated.

In step 1704, the SDSF replies to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1705, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1706, the target SMF notifies the UDM to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1707, the target SMF notifies the UPF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1708, the target SMF notifies the AMF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF. The AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1709, the target SMF replies to the NRF with a user control plane migration response, indicating that the target SMF has established relevant user information and can operate normally.

In step 1710, the NRF replies to the user control plane migration response to the network management platform, and the user control plane migration is completed.

In step 1711, the NRF notification source SMF user control plane migration is completed, carrying the identification information of the migrated user group, and the IP address of the target SMF corresponding to the user group.

As shown in FIG. 18, in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The third NF is an AMF. The AMF periodically monitors the source SMF. When the source SMF fails or does not respond, the AMF requests the target SMF to migrate the user to the NRF. The NRF uses information such as location, slice, DNAI, and other service parameters, and each. SMF weight, load, coverage location area, select target SMF, AMF informs the target SMF to migrate the user accessing the source SMF to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity to notify the source SMF. The migrated user group is deleted locally to implement source SMF user control plane resource migration. This example includes steps 1800 through 1811.

In step 1800, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 1801, the AMF performs NF detection on the source SMF.

In step a. When the source SMF does not respond or the response times out.

In step 1802, the AMF sends a request discovery target SMF to the NRF, carrying information slice information and location information.

In step 1803, the NRF selects the target SMF based on the slice, location, and source SMF load information, and carries the target SMF IP address in the AMF request response message.

In step 1804, the AMF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1805, the target SMF sends a request for acquiring a user group information to the SDSF, and carries the identification information of the user to be migrated.

In step 1806, the SDSF responds to the target SMF user information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1807, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1808, the target SMF notifies the UDM to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1809, the target SMF notifies the UPF to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1810, the target SMF notifies the AMF to update the SMF node information of the user group to be migrated, carries the SMF IP address corresponding to the user group to be migrated, and the TEIDC information of the target SMF, and the AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. . If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1811, the target SMF notifies the source SMF that the user control plane migration is completed, and carries the identification information of the migrated user group.

In step b, the source SMF locally deletes the user group information that has been migrated to the target SMF.

As shown in FIG. 19, in this application example, the PCF periodically monitors the source SMF. When the source SMF fails or does not respond, the PCF requests the target SMF to migrate the user to the NRF. The NRF is based on information such as location, slice, DNAI, and other service parameters. And the weight, load, and coverage area of each SMF, and the target SMF is selected. The AMF notifies the target SMF to migrate the user accessing the source SMF to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity. The notification source SMF locally deletes the migrated user group and implements resource migration of the source SMF user control plane. This example includes steps 1900 through 1911.

In step 1900, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 1901, the PCF performs NF detection on the source SMF.

In step a, the source SMF does not respond or the response times out.

In step 1902, the PCF sends a request discovery target SMF to the NRF, carrying information slice information and location information.

In step 1903, the NRF selects the target SMF based on the slice, location, and SMF load information, and carries the target SMF IP address in the AMF request response message.

In step 1904, the PCF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 1905, the target SMF sends a request for acquiring a user group information to the SDSF, and carries the identification information of the user to be migrated.

In step 1906, the SDSF replies with the target SMF user group information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 1907, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1908, the target SMF notifies the UDM to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1909, the target SMF notifies the UPF to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1910, the target SMF notifies the AMF to update the SMF node information of the user group to be migrated, carries the SMF IP address corresponding to the user group to be migrated, and the TEIDC information of the target SMF, and the AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. . If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 1911, the target SMF notifies the source SMF that the user control plane migration is completed, and carries the identification information of the migrated user group.

As shown in FIG. 20, in the application example, the UDM periodically monitors the source SMF. When the source SMF fails or is unresponsive, the UDM requests the target SMF to migrate the user to the NRF. The NRF is based on information such as location, slice, DNAI, and other service parameters. And the weight, load, and coverage area of each SMF, and the target SMF is selected. The AMF notifies the target SMF to migrate the user accessing the source SMF to the target SMF. After the access user migration is completed, the target SMF notifies the peripheral functional entity. The notification source SMF locally deletes the migrated user group and implements resource migration of the source SMF user control plane. This example includes steps 2000 through 2011.

In step 2000, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 2001, the UDM performs NF detection on the source SMF.

In step a, the source SMF does not respond or the response times out.

In step 2002, the UDM sends a request discovery target SMF to the NRF, carrying information slice information and location information.

In step 2003, the NRF selects the target SMF according to the slice, location, and source SMF load information, and carries the target SMF IP address in the AMF request response message.

In step 2004, the UDM initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be Is the FQDN or URL identifier of the node.

In step 2005, the target SMF sends a request for acquiring a user group information to the SDSF, and carries the identification information of the user to be migrated.

In step 2006, the SDSF responds to the target SMF user group information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 2007, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2008, the target SMF notifies the UDM to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2009, the target SMF notifies the UPF to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2010, the target SMF notifies the AMF to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF, and the AMF updates the address information and TEIDC information of the SMF corresponding to the user group to be migrated. . If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2011, the target SMF notifies the source SMF user control plane that the migration is complete, and carries the identification information of the migrated user group.

As shown in FIG. 21, in the application example, the first NF and the second NF are taken as an SMF, wherein the first NF is used as the source SMF and the second NF is used as the target SMF. Similarly, the first NF and the second N may also be NFs such as AMF, UDM, or PCF. The third NF is an AMF. When the UE moves or sends a location update, the AMF is triggered to detect the target location of the UE. The AMF finds that the SMF cannot serve the target TA (Tracking Area), and the AMF requests the target SMF to migrate the user to the NRF. The NRF selects the target SMF based on information such as location, slice, DNAI and other service parameters, and the weight, load, and coverage location area of each SMF. The AMF notifies the target SMF to migrate the user accessing the source SMF to the target SMF. After the user migration is completed, the target SMF notifies the neighboring functional entity, and the source SMF is notified to delete the migrated user group locally, and the source SMF user control plane resource migration is implemented. This example includes steps 2100 through 2113.

In step 2100, the UE initiates a session establishment request, the session establishment is completed, and the source SMF accesses the user.

In step 2101a, a change in position occurs when the UE moves.

In step 2101b, when the AMF receives the location update message or the RAN handover message on the RAN side, the AMF detects the UE target location, and the AMF discovery source SMF cannot serve the target TA region.

In step 2102, the AMF sends a request discovery target SMF to the NRF, carrying information slice information and location information.

In step 2103, the NRF selects the target SMF according to the slice, location, and SMF load information, and carries the target SMF IP address in the AMF request response message.

In step 2104, the AMF initiates a user control plane migration request to the target SMF, and carries information such as the identity information of the user to be migrated and the address information of the source SMF. The user to be migrated may be a user group UE Set, and the address information of the source SMF may be an FQDN or a URL identifier of the node.

In step 2105, the target SMF sends a request for acquiring a user group information to the SDSF, and carries the identification information of the user to be migrated.

In step 2106, the SDSF replies to the target SMF user group information response, and carries the information about the user to be migrated, the user context information, the PDU session, and the SMF and other control plane resource information related to the user.

In step 2107, the target SMF notifies the PCF to update the SMF node information of the user to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the PCF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2108, the PCF sends an update response message to the target SMF, and sends new policy information.

In step 2109, the target SMF notifies the UDM to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UDM updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2110, the target SMF notifies the UPF to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated, and the UPF updates the address information of the SMF corresponding to the user group to be migrated. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2111, the target SMF notifies the AMF to update the SMF node information of the user group to be migrated, and carries the SMF IP address corresponding to the user group to be migrated and the TEIDC information of the target SMF, and the AMF updates the address information and TEIDC of the SMF corresponding to the user group to be migrated. And target strategy information. If the address information of the SMF is represented by an IP address, it is directly replaced with the IP address of the target SMF; if the address information of the SMF is represented by an FQDN or a URL, the IP address corresponding to the FQDN/URL of the SMF associated with the user group to be migrated is updated to The IP address of the target SMF.

In step 2112, the AMF replies with a RAN update response carrying policy information.

In step 2113, the target SMF notifies the source SMF that the user control plane migration is completed, and carries the identification information of the migrated user group.

The embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to the NRF, and the apparatus is configured to implement the foregoing embodiments and implementation manners, and the description has been omitted. As used hereinafter, the term "module" may implement a combination of at least one of software and hardware for a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

As shown in FIG. 22, the embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to an NRF, and includes a determining module 2201, a selecting module 2202, and a sending module 2203.

The determining module 2201 is configured to determine a user control plane resource for migrating the first network function entity NF.

The selection module 2202 is configured to select a second NF of the same type as the first NF.

The sending module 2203 is configured to send a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.

In an embodiment, the method further includes: a receiving module, configured to receive a user control plane migration response sent by the second NF, where the user control plane migration response carries information that the user control plane migration is completed.

The sending module 2203 is further configured to send a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.

In an embodiment, the determining module 2201 is configured to: receive load information sent by the first NF, determine, according to the load information, all or part of user control plane resources that migrate the first NF; or receive the first The reporting information sent by the neighboring NF of the NF determines to migrate all or part of the user control plane resources of the first NF according to the reporting information; or monitors the connected NF, and determines to migrate all or part of the user control plane of the first NF according to the monitoring information. The resource is received; or the migration command of the network management is received, and all or part of the user control plane resources of the first NF are migrated.

The embodiment of the present application further provides a network function storage library functional entity, including: a processor; a memory configured to store the processor executable instructions; and a transmission device configured to perform information transmission and reception communication according to the control of the processor; The processor is configured to: perform a migration of a user control plane resource of the first NF; select a second NF of the same type as the first NF; and send a user control plane migration request to the second NF, The user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

In an embodiment, the processor is further configured to: receive a user control plane migration response sent by the second NF, where the user control plane migration response carries information that the user control plane migration is completed; The first NF sends a user control plane migration completion notification, where the user control plane migration completion notification carries the address information of the second NF and the identification information of the migrated user.

As shown in FIG. 23, the embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to the third NF, and the apparatus is configured to implement the foregoing embodiments and implementation manners, and details have been omitted for description. As used hereinafter, the term "module" may implement a combination of at least one of software and hardware for a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

An embodiment of the present application provides an apparatus for implementing control plane resource migration, which is applied to a third NF, including a determining module 2301 and a sending module 2302.

a determining module 2301, configured to determine a user control plane resource for migrating the first NF, and selecting, by the network function repository function entity NRF, a second NF of the same type as the first NF; wherein the third NF is the Adjacent NF of an NF.

The sending module 2302 is configured to send a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.

The sending module 2302 is further configured to send a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.

In an embodiment, the determining module 2301 is configured to: receive load information sent by the first NF, determine, according to the load information, all or part of user control plane resources that migrate the first NF; or monitor the first An NF determines to migrate all or part of the user control plane resources of the first NF according to the monitoring information.

In an embodiment, the determining module 2301 is configured to: send a request for discovering the second NF to the NRF; and receive a response of the NRF, where the response carries the address information of the second NF selected by the NRF.

The embodiment of the present application further provides a network function entity, including: a processor; a memory configured to store the processor executable instructions; and a transmission device configured to perform information transmission and reception communication according to the control of the processor; The processor is configured to: perform a migration of the user control plane resource of the first NF, select a second NF of the same type as the first NF by the network function repository function entity NRF; and send the user to the second NF The control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.

The embodiment of the present application further provides an apparatus for implementing control plane resource migration, which is applied to the second NF, and the apparatus is configured to implement the foregoing embodiments and implementation manners, and details have been omitted for description. As used hereinafter, the term "module" may implement a combination of at least one of software and hardware for a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

As shown in FIG. 24, the embodiment of the present application provides an apparatus for implementing control plane resource migration, which is applied to a second NF, and includes a receiving module 2401, an obtaining module 2402, and a notification module 2403.

The receiving module 2401 is configured to receive a user control plane migration request, where the user control plane migration request carries address information of the first NF and identifier information of the user to be migrated.

The obtaining module 2402 is configured to acquire control plane resource information of the user to be migrated according to the identifier information of the user to be migrated.

The notification module 2403 is configured to notify the neighboring NF of the first NF, and update the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF.

In an embodiment, the method further includes: a sending module, configured to send a user control plane migration completion notification, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.

In an embodiment, the obtaining module 2402 is configured to: send a request for acquiring a user information to the SDSF, where the request for acquiring the user information carries the identification information of the user to be migrated; and receive the response of the user information sent by the SDSF, The acquiring user information response carries the control plane resource information of the user to be migrated.

In an embodiment, the notification module 2403 is configured to: notify the neighboring NF of the first NF, and update the IP address of the first NF associated with the user to be migrated in the neighboring NF to the second Update the IP address of the NF, or notify the neighboring NF of the first NF, and update the IP address corresponding to the FQDN or the URL of the first NF associated with the user to be migrated in the neighboring NF to the IP of the second NF. address.

The embodiment of the present application further provides a network function entity, including: a processor; a memory, configured to store the processor executable instructions; and a transmission device configured to perform information transmission and reception communication according to the control of the processor.

The processor is configured to: receive a user control plane migration request, where the user control plane migration request carries address information of the first NF and identifier information of the user to be migrated; and according to the identifier information of the user to be migrated Obtaining the control plane resource information of the user to be migrated; notifying the neighboring NF of the first NF, and updating the address information of the first NF associated with the user to be migrated in the neighboring NF to the address of the second NF information.

In an embodiment, the processor is further configured to: notify a neighboring NF of the first NF, and update address information of the first NF associated with the user to be migrated in the neighboring NF to the After the address information of the second NF, a user control plane migration response is sent, and the user control plane migration response carries information that the user control plane migration is completed.

The embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being configured to perform a method for implementing control plane resource migration as shown in FIG. 5.

The embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being configured to perform a method for implementing control plane resource migration as shown in FIG. 7 .

The embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being configured to perform a method for implementing control plane resource migration as shown in FIG. 8.

In this embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk. A variety of media that can store program code.

Those skilled in the art should appreciate that the above-described modules or steps of the embodiments of the present application may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices. For example, they may be implemented in program code executable by a computing device such that they may be stored in a storage device for execution by a computing device and, in some instances, may be performed in a different order than that illustrated herein. Or the steps described, either separately as an integrated circuit module, or as a plurality of modules or steps in a single integrated circuit module. Thus, embodiments of the present application are not limited to any particular combination of hardware and software.

Claims

A method for implementing control plane resource migration includes:

The network function repository function entity NRF determines a user control plane resource for migrating the first network function entity NF;

The NRF selects a second NF of the same type as the first NF;

The NRF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated.
The method of claim 1, after the NRF sends a user control plane migration request to the second NF, the method further includes:

Receiving, by the NRF, a user control plane migration response sent by the second NF, where the user control plane migration response carries information that the user control plane migration is completed;

The NRF sends a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identification information of the migrated user.
The method of claim 1, wherein the NRF determines to migrate user control plane resources of the first NF, including one of the following:

The NRF receives the load information sent by the first NF, and determines, according to the load information, all user control plane resources or part of user control plane resources that migrate the first NF;

The NRF receives the report information sent by the neighboring NF of the first NF, and determines to migrate all user control plane resources or part of the user control plane resources of the first NF according to the report information;

The NRF monitors the connected NF, and determines to migrate all user control plane resources or part of the user control plane resources of the first NF according to the monitoring information;

The NRF receives the migration instruction of the network management, and determines to migrate all user control plane resources or partial user control plane resources of the first NF.
The method of claim 1 wherein said NRF selecting a second NF of the same type as said first NF comprises:

The NRF selects a second NF of the same type as the first NF according to at least one of load information, location information, and slice information of the first NF.
The method according to any one of claims 1 to 4, wherein

The address information of the first NF is represented by one of the following: a full name domain name FQDN, a uniform resource locator URL, and an internetworking protocol IP address;

The identification information of the user to be migrated is the identification information of the user group, and the identification information of the user group is represented by one of the following: a group identifier, an international mobile subscriber identity IMSI segment, and a session management function entity SMF identifier.
The method according to any one of claims 1 to 4, wherein the first NF and the second NF are one of: an SMF, an access management function entity AMF, a unified data management entity UDM, and a policy control function entity. PCF.
A method for implementing control plane resource migration includes:

The third network function entity NF determines to migrate the user control plane resource of the first NF, and selects a second NF of the same type as the first NF by using the network function repository function entity NRF; wherein the third NF is the Adjacent NF of an NF;

The third NF sends a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.
The method of claim 7, after the third NF sends a user control plane migration request to the second NF, the method further includes:

The third NF receives a user control plane migration response sent by the second NF, where the user control plane migration response carries information that the user control plane migration is completed;

The third NF sends a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.
The method of claim 7, wherein the third NF determines to migrate user control plane resources of the first NF, including at least one of the following:

The third NF receives the load information sent by the first NF, and determines, according to the load information, all user control plane resources or part of user control plane resources that migrate the first NF;

The third NF monitors the first NF, and determines, according to the monitoring information, all user control plane resources or part of user control plane resources that migrate the first NF;

The third NF receives the migration instruction of the network management, and determines to migrate all user control plane resources or part of the user control plane resources of the first NF.
The method of claim 7, wherein the selecting, by the NRF, the second NF of the same type as the first NF comprises:

Sending, by the third NF, a request for discovering a second NF to the NRF;

The third NF receives the response of the NRF, and the response carries address information of the second NF selected by the NRF.
The method according to any one of claims 7 to 10, wherein

The address information of the first NF is represented by one of the following: a full name domain name FQDN, a uniform resource locator URL, and an internetworking protocol IP address;

The identification information of the user to be migrated is the identification information of the user group, and the identification information of the user group is represented by one of the following: a group identifier, an international mobile subscriber identity IMSI segment, and a session management function entity SMF identifier.
The method according to any one of claims 7 to 10, wherein the first NF, the second NF, and the third NF are one of: the SMF, an access management function entity AMF, and a unified data management entity. UDM and policy control function entity PCF.
A method for implementing control plane resource migration includes:

The second network function entity NF receives the user control plane migration request, where the user control plane migration request carries the address information of the first NF and the identity information of the user to be migrated;

The second NF acquires control plane resource information of the user to be migrated according to the identifier information of the user to be migrated;

The second NF notifies the neighboring NF of the first NF, and updates the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF.
The method of claim 13, the second NF notifying the neighboring NF of the first NF, and updating the address information of the first NF associated with the user to be migrated in the neighboring NF to the second NF After the address information, it also includes:

The second NF sends a user control plane migration response, and the user control plane migration response carries information that the user control plane migration is completed.
The method of claim 13, wherein the second NF acquires control plane resource information of the user to be migrated according to the identification information of the user to be migrated, including:

The second NF sends a request for acquiring a user information to the structured data storage entity SDSF, where the acquiring user information request carries the identification information of the user to be migrated;

The second NF receives the user information response sent by the SDSF, and the acquiring user information response carries the control plane resource information of the user to be migrated.
The method according to claim 13 or 15, wherein the control plane resource information of the user to be migrated comprises one of the following:

User context information;

The user context information and protocol data unit PDU session information;

The user context information, the PDU session information, and quality of service and flow control information.
The method of claim 13, wherein the second NF notifies the neighboring NF of the first NF, and updates the address information of the first NF associated with the user to be migrated in the neighboring NF to the first Two NF address information, including:

The second NF notifies the neighboring NF of the first NF, and updates the Internet Protocol IP address of the first NF associated with the user to be migrated in the neighboring NF to the IP address of the second NF, or

The second NF notifies the neighboring NF of the first NF, and updates the IP address corresponding to the full-name domain name FQDN or the uniform resource locator URL of the first NF associated with the user to be migrated in the neighboring NF to the first NF The IP address of the second NF.
The method according to any one of claims 13 to 15, wherein the first NF and the second NF are one of: a session management function entity SMF, an access management function entity AMF, a unified data management entity UDM, and The policy control function entity PCF.
An apparatus for implementing control plane resource migration is applied to a network function storage library functional entity NRF, including:

a determining module, configured to determine a user control plane resource for migrating the first network function entity NF;

Selecting a module, configured to select a second NF of the same type as the first NF;

The sending module is configured to send a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.
The apparatus of claim 19, further comprising:

a receiving module, configured to receive a user control plane migration response sent by the second NF, where the user control plane migration response carries information that the user control plane migration is completed;

The sending module is further configured to send a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.
The apparatus of claim 19, wherein the determining module is configured to perform one of:

Receiving load information sent by the first NF, and determining, according to the load information, all user control plane resources or part of user control plane resources that migrate the first NF;

Receiving the report information sent by the neighboring NF of the first NF, and determining, according to the report information, all the user control plane resources of the first NF or the user control plane resource part;

Monitoring the connected NF, and determining to migrate all user control plane resources or partial user control plane resources of the first NF according to the monitoring information;

The migration command of the network management system is received, and all or part of the user control plane resources of the first NF are migrated.
A network function repository functional entity, comprising:

processor;

a memory configured to store the processor executable instructions;

a transmission device configured to perform information transceiving communication according to control of the processor;

Wherein the processor is configured to perform the following operations:

Determining a user control plane resource for migrating the first network function entity NF;

Selecting a second NF of the same type as the first NF;

Sending a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.
The network function repository functional entity of claim 22 wherein said processor is further configured to perform the following operations:

Receiving, by the second NF, a user control plane migration response, where the user control plane migration response carries information that the user control plane migration is completed;

Sending a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identification information of the migrated user.
An apparatus for implementing control plane resource migration is applied to a third NF, including:

a determining module, configured to determine a user control plane resource for migrating the first NF, and selecting, by the network function repository function entity NRF, a second NF of the same type as the first NF; wherein the third NF is the first Adjacent NF of NF;

The sending module is configured to send a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.
The apparatus of claim 24, further comprising:

a receiving module, configured to receive a user control plane migration response sent by the second NF, where the user control plane migration response carries information that the user control plane migration is completed;

The sending module is further configured to send a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.
The apparatus of claim 24, wherein the determining module is configured to perform one of:

Receiving load information sent by the first NF, and determining, according to the load information, all user control plane resources or part of user control plane resources that migrate the first NF;

Monitoring the first NF, and determining, according to the monitoring information, all user control plane resources or part of user control plane resources that migrate the first NF;

The migration command of the network management system is received, and all user control plane resources or partial user control plane resources of the first NF are migrated.
The apparatus according to claim 24, wherein said determining module is configured to:

Sending a request to discover the second NF to the NRF;

Receiving a response of the NRF, where the response carries address information of a second NF selected by the NRF.
A network functional entity, including:

processor;

a memory configured to store the processor executable instructions;

a transmission device configured to perform information transceiving communication according to control of the processor;

Wherein the processor is configured to perform the following operations:

Determining a user control plane resource of the first network function entity NF, and selecting a second NF of the same type as the first NF by using the network function repository function entity NRF;

Sending a user control plane migration request to the second NF, where the user control plane migration request carries the address information of the first NF and the identifier information of the user to be migrated.
The network functional entity of claim 28, said processor further arranged to:

Receiving, by the second NF, a user control plane migration response, where the user control plane migration response carries information that the user control plane migration is completed;

Sending a user control plane migration completion notification to the first NF, where the user control plane migration completion notification carries the address information of the second NF and the identification information of the migrated user.
An apparatus for implementing control plane resource migration is applied to a second NF, including:

a receiving module, configured to receive a user control plane migration request, where the user control plane migration request carries address information of the first NF and identifier information of the user to be migrated;

Obtaining a module, configured to acquire control plane resource information of the user to be migrated according to the identifier information of the user to be migrated;

The notification module is configured to notify the neighboring NF of the first NF, and update the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF.
The apparatus of claim 30, further comprising:

The sending module is configured to send a user control plane migration completion notification, where the user control plane migration completion notification carries the address information of the second NF and the identifier information of the migrated user.
The apparatus of claim 30, wherein the obtaining module is configured to:

Sending a user information request to the structured data storage entity SDSF, where the acquiring user information request carries the identification information of the user to be migrated;

And receiving the user information response sent by the SDSF, where the acquiring user information is in response to carrying the control plane resource information of the user to be migrated.
The apparatus of claim 30, wherein the notification module is configured to:

Notifying the neighboring NF of the first NF, updating the Internet Protocol IP address of the first NF associated with the user to be migrated in the neighboring NF to an IP address of the second NF, or

And notifying the neighboring NF of the first NF, and updating the IP address corresponding to the full-name domain name FQDN or the uniform resource locator URL of the first NF associated with the user to be migrated in the neighboring NF to the IP address of the second NF .
A network functional entity, including:

processor;

a memory configured to store the processor executable instructions;

a transmission device configured to perform information transceiving communication according to control of the processor;

Wherein the processor is configured to perform the following operations:

Receiving a user control plane migration request, where the user control plane migration request carries the address information of the first NF and the identification information of the user to be migrated;

Obtaining control plane resource information of the user to be migrated according to the identifier information of the user to be migrated;

And notifying the neighboring NF of the first NF, and updating address information of the first NF associated with the user to be migrated in the neighboring NF to address information of the second NF.
The network function entity of claim 34, said processor further arranged to perform the following operations:

Notifying the neighboring NF of the first NF, and after updating the address information of the first NF associated with the user to be migrated in the neighboring NF to the address information of the second NF, sending a user control plane migration response, The user control plane migration response carries information about the completion of the user control plane migration.
A computer readable storage medium storing computer executable instructions arranged to perform the method of implementing control plane resource migration of any of claims 1-6.
A computer readable storage medium storing computer executable instructions arranged to perform the method of implementing control plane resource migration of any of claims 7-13.
A computer readable storage medium storing computer executable instructions arranged to perform the method of implementing control plane resource migration of any of claims 13-18.