CN114071626A

CN114071626A - Reselection decision method, network data analysis function and storage medium

Info

Publication number: CN114071626A
Application number: CN202010787802.7A
Authority: CN
Inventors: 秦鹏太; 李爱华; 魏彬
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-02-18
Also published as: WO2022028580A1

Abstract

The invention discloses a reselection decision method, a network data analysis function and a medium, comprising the following steps: a network data analysis function subscribes to a user position initiated by an access and mobile management function, wherein network data analysis service of the user is provided by the network data analysis function; determining whether the network data analysis service can be continuously provided according to the position notified by the access and mobility management function; and if the network data analysis function is determined not to be continuously provided, the network data analysis function is reselected. By adopting the invention, the network data analysis function reselection based on the user mobility can be realized, and the network data analysis function reselection can be efficiently realized on the basis of the existing network architecture. The crossing degree of the intelligent analysis business process and the actual user business process is reduced. The method can be used for supplementing the deficiency of related scenes in the prior art and is easy for subsequent unified popularization.

Description

Reselection decision method, network data analysis function and storage medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a reselection decision method, a network data analysis function, and a medium.

Background

Fig. 1 is a schematic diagram of a 5GC (5G Core Network ) standard definition Network architecture, and as shown in the figure, a control plane adopts a Service Based SBI (Service Based Interface) Interface:

the 5G network needs how to support intelligence from various aspects such as architecture level, key problems and the like, including a data collection mechanism, closed-loop feedback of data analysis results to the 5GC and how to control processing of the 5 GC.

According to the intelligent introduction definition of 3GPP, NWDAF (Network data analysis function) is an independent logic function in 5GC and is specially responsible for data collection, data analysis and analysis result feedback.

The NWDAF is a standardized network element introduced by the 3GPP in the 5GC, is an AI (Artificial intelligence) of the 5GC plus big data engine, and has the characteristics of standardized capacity, network data convergence, higher real-time performance, closed-loop controllability support and the like.

The NWDAF mainly has the following network functions:

collecting data;

analyzing data;

feeding back an analysis result;

facing other intelligent systems;

interactive data, models, and parameters.

As an intelligent node of a core network, an NWDAF exists in a scenario that requires NWDAF reselection due to user mobility change: for the position movement of a UE (User Equipment), there may be a case where the current NWDAF cannot continuously provide intelligent analysis for the UE after the position movement; considering the above scenario, the NWDAF node needs to have an addressing capability for reselecting the target NWDAF.

The existing solution idea is as follows:

the AMF (Access and Mobility Management Function) registers the obtained NWDAF message to a UDM (Unified Data Management entity), changes when the user moves to a certain position, and uses a related network element to perform UDM query to obtain the NWDAF corresponding to the AMF, thereby completing a NWDAF reselection related process.

The prior art is not sufficient to provide an NWDAF reselection specific scheme applicable to a general scene.

Disclosure of Invention

The invention provides a reselection decision method, a network data analysis function and a storage medium, which are used for providing an NWDAF reselection scheme based on user mobility and applicable to a common scene.

The invention provides the following technical scheme:

a reselection decision method, comprising:

the method comprises the steps that an NWDAF subscribes to a user position initiated by an access and mobility management function (AMF), and network data analysis service of the user is provided by the NWDAF;

the NWDAF determines whether the network data analysis service can be continuously provided according to the position notified by the AMF;

and initiating the NWDAF reselection if the NWDAF determines that the supply cannot be continued.

In implementation, the location notified by the AMF is a location that the AMF subscribes according to the location of the NWDAF user and sends the notification after determining that the routing area identity TAI of the user changes.

In an implementation, the method further comprises the following steps:

and the NWDAF inquires the NRF about a target NWDAF for providing network data analysis service for the user after the position is changed according to the changed position.

In an implementation, the method further comprises the following steps:

and the NWDAF sends a switching request to the target NWDAF to request the target NWDAF to accept a network data analysis task of the user.

In an implementation, the method further comprises the following steps:

the NWDAF sends network data analysis information to the target NWDAF.

In implementation, the original NWDAF and/or the target NWDAF notify the consumer NF of an NWDAF reselection event, and after the reselection is completed, the original NWDAF notifies the source NF to cancel the original subscription.

An NWDAF, comprising:

a processor for reading the program in the memory, performing the following processes:

subscribing to a subscriber location initiated by an access and mobility management function, AMF, the subscriber's network data analysis service being provided by the NWDAF;

determining whether the network data analysis service can be continuously provided according to the position notified by the AMF;

if the NWDAF reselection is determined to be unable to continue providing, initiating the NWDAF reselection;

a transceiver for receiving and transmitting data under the control of the processor.

In an implementation, the method further comprises the following steps:

and inquiring the target NWDAF of the network data analysis service for the user after the position change from the NRF according to the changed position.

In an implementation, the method further comprises the following steps:

and sending a switching request to the target NWDAF to request the target NWDAF to accept a network data analysis task of the user.

In an implementation, the method further comprises the following steps:

and sending network data analysis information to the target NWDAF.

In the implementation, initiating NWDAF reselection is to notify the consumer NF to initiate NWDAF reselection.

In implementation, the original NWDAF and/or the target NWDAF notify the consumernf of an NWDAF reselection event, and after the reselection is completed, the original NWDAF notifies the source NF to cancel the original subscription.

An NWDAF, comprising:

a subscription module, configured to subscribe to a user location initiated by an access and mobility management function AMF, where a network data analysis service of the user is provided by the NWDAF;

the service module is used for determining whether the network data analysis service can be continuously provided according to the position notified by the AMF;

and the reselection module is used for initiating NWDAF reselection if the determination result shows that the supply can not be continued.

In implementation, the service module is further configured to receive a location sent by the AMF after determining that a routing area identifier TAI of the user changes according to the NWDAF user location subscription.

In an implementation, the method further comprises the following steps:

and the target query module is used for querying the NRF for a target NWDAF of the network data analysis service after the position is changed according to the changed position.

In an implementation, the method further comprises the following steps:

and the switching request module is used for sending a switching request to the target NWDAF and requesting the target NWDAF to accept the network data analysis task of the user.

In an implementation, the method further comprises the following steps:

and the sending module is used for sending the network data analysis information to the target NWDAF.

In an implementation, the NWDAF initiates NWDAF reselection, which is to notify the consumer NF to initiate NWDAF reselection.

In implementation, the reselection module is further configured to notify the consumer NF of an NWDAF reselection event, and notify the source NF to cancel an original subscription after reselection is completed.

A computer-readable storage medium having stored thereon a computer program for executing the above-described reselection decision method.

The invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, the NWDAF is adopted to change the NRF based on the position to find the target NWDAF to complete the reselection process, so that the NWDAF reselection based on the user mobility can be realized, and the NWDAF reselection can be efficiently realized on the basis of the existing network architecture.

Furthermore, the crossing degree of the intelligent analysis service flow and the actual user service flow is reduced.

Furthermore, the method and the device supplement the deficiency of related scenes in the prior art, and are easy to popularize uniformly in the follow-up process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a diagram illustrating a 5GC standard definition network architecture in the background art;

fig. 2 is a schematic flow chart illustrating an implementation of a reselection determination method for an NWDAF side according to an embodiment of the present invention;

FIG. 3 is a schematic flow chart illustrating an implementation of the AMF reselection processing method according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a consumer NF-side reselection processing method according to an embodiment of the present disclosure;

fig. 5 is a schematic view of an NWDAF reselection process in embodiment 1 of the present invention;

fig. 6 is a schematic view of an NWDAF reselection process in embodiment 2 of the present invention;

FIG. 7 is a diagram illustrating an NWDAF structure in accordance with an embodiment of the present invention.

Detailed Description

Aiming at existing scenes, the embodiment of the invention provides an NWDAF reselection process based on user mobility, which can efficiently realize the NWDAF reselection on the basis of the existing network architecture.

The following describes embodiments of the present invention with reference to the drawings.

In the course of the description, the implementation will be described from the NWDAF, AMF and consumer NF sides, respectively, and then an example of their implementation in cooperation will also be given to better understand the implementation of the scheme given in the embodiments of the present invention. Such description does not mean that they must be implemented in combination or separately, and in fact, when they are implemented separately, they each solve the problem on one side of themselves, and when they are used in combination, they achieve better technical results.

In the scheme provided by the embodiment of the invention, an NWDAF is adopted to subscribe a position change event request of (single or one group of) UE to an AMF, the NWDAF supports to inquire an NRF after the position is changed to obtain a target NWDAF for providing service capability for a new position, and simultaneously the NWDAF supports to inform a consumer NF (consumer NF; NF: Network Function) to initiate NWDAF reselection and supports to transfer the existing analysis data information to the target NWDAF, and the target NWDAF informs the consumer NF to continue to provide analysis service after the data reception is completed. According to the user position change scene, the method is divided into an AMF (advanced metering framework) constant scene and an AMF change scene.

The following description will be made separately.

Fig. 2 is a schematic flow chart of an implementation of a reselection determination method on an NWDAF side, which may include:

step 201, an NWDAF subscribes to a user location initiated by an access and mobility management function (AMF), and a network data analysis service of the user is provided by the NWDAF;

step 202, the NWDAF determines whether the network data analysis service can be continuously provided according to the position notified by the AMF;

step 203, if the NWDAF determines that the NWDAF can not continue to provide, initiating NWDAF reselection.

Specifically, in step 202, the NWDAF may locally configure and store the location information for providing intelligent analysis, and after accepting the change of the location information of the user, determine whether the network data analysis service can be continuously provided by determining whether the new location information is within the range capable of providing the service.

That is, the NWDAF subscribes to the AMF for the user location change, so that the AMF notifies when the user location changes.

In an implementation, the method further comprises the following steps:

That is, the source NWDAF has the capability of querying the target NWDAF based on the new location information to the NRF (Network storage Function).

In an implementation, the method further comprises the following steps:

the NWDAF sends network data analysis information to the target NWDAF.

Specifically, according to the result returned by the NRF, the original NWDAF sends a switching request to the target NWDAF, requesting the target NWDAF to accept the user analysis task; after the target NWDAF acknowledges the reply, relevant information (including the model) transfer begins. The target NWDAF notifies the original NWDAF that the acceptance has been completed after the information transfer is completed.

Specifically, the source NWDAF notifies the consumer to perform NWDAF reselection, and the NWDAF may send an NWDAF _ analysis subscription _ Notify message to the consumer NF to Notify the consumer NF to start NWDAF reselection.

In implementation, the NWDAF and/or the target NWDAF notify the consumernf of an NWDAF reselection event, and after the reselection is completed, the original NWDAF notifies the source NF to cancel the original subscription.

Fig. 3 is a schematic flow chart of an implementation of the AMF reselection processing method, which may include:

step 301, receiving, by the AMF, an NWDAF subscription request notification, where the notification request notifies the NWDAF when a user location changes;

step 302, when the AMF changes the user position, the AMF sends a user position change notification to the NWDAF.

In an implementation, the method further comprises the following steps:

and when the AMF for providing services for the user changes, the AMF notifies the changed AMF of the subscription requirement of the NWDAF.

In a specific implementation, the AMF notifies the changed AMF of the subscription requirement of the NWDAF through a Namf _ Communication _ createcontext Request message.

That is, the source AMF transmits NWDAF-related location subscription information to the target AMF through a Namf _ Communication _ createeuecontext Request (Namf Communication create user equipment context Request).

Fig. 4 is a schematic flow chart of an implementation process of a conditioner NF-side reselection processing method, which may include:

step 401, the consumer NF receives a notification that NWDAF initiates NWDAF reselection;

step 402, the consumer NF initiates NWDAF reselection according to the notification.

The following is an example.

Example 1

In this example, the AMF serving the UE is unchanged.

Fig. 5 is a schematic view of an NWDAF reselection process in embodiment 1, as shown in the figure, the main steps may be as follows:

1. the user is normally online and NF consumer finds NWDAF through NRF.

2. The NWDAF discovers the source NF node of the serving UE and subscribes to the acquisition request.

Specifically, for example, the NWDAF provides for discovering the source NF node of the serving UE and subscribing to the acquisition request according to protocol 23.288.

3. The NWDAF subscribes to UE location change to the AMF.

4. The user moves, the position is changed, and if the AMF is not changed, the AMF informs the NWDAF of the position change of the user; carrying key information such as user location, for example: TAI (Tracking Area Identity) + CELL ID (CELL Identity).

5. And the NWDAF judges whether the analysis service can be continuously provided or not based on the new position information, and if the reselection process cannot be started, the NWDAF judges whether the analysis service can be continuously provided or not. The NWDAF notifies the consumernf to initiate NWDAF reselection.

6. The NWDAF carries UE-related information (e.g., slice ID, location information, analysis ID) to NRF discover a target NWDAF that can provide a service.

7. And according to the result returned by the NRF, the original NWDAF sends a switching request to the target NWDAF to request the target NWDAF to receive a user analysis task.

8. After the target NWDAF acknowledges the reply, relevant information (including the analysis ID, model) transfer begins. The target NWDAF notifies the original NWDAF that the acceptance has been completed after the information transfer is completed. The original NWDAF notifies the source NF to unsubscribe from the acquisition request.

9. The target/original NWDAF notifies the consumer NF to complete NWDAF reselection.

10. The target NWDAF discovers the source NF of the serving UE after handover based on the definition of 23.288 and opens a subscription acquisition request.

Specifically, for example, the target NWDAF is based on discovering the node of the serving UE after handover according to the definition of 23.288 and starts collecting data.

Example 2

In this example, the AMF serving the UE changes after the UE location changes.

Fig. 6 is a schematic view of an NWDAF reselection process in embodiment 2, as shown in the figure, the main steps may be as follows:

1. the user is normally online and NF consumer finds NWDAF through NRF.

2. The NWDAF discovers the source NF of the serving UE and subscribes to the acquisition request.

Specifically, for example, NWDAF specifies, according to protocol 23.288, a source NF of a serving UE that discovers the serving UE and subscribes to the acquisition request.

3. The NWDAF subscribes to UE location change to the AMF.

4. The user moves, the location changes, if the AMF changes, the old AMF transmits the location subscription information to the new AMF through the Namf _ Communication _ createeecontext Request, and carries the key information such as the user location, for example: TAI + CELL ID.

5. And after the AMF switching process is completed, the new AMF informs the NWDAF of the user position change.

6. And the NWDAF judges whether the analysis service can be continuously provided or not based on the new position information, and if the analysis service cannot be continuously provided, a reselection process is started.

7. The NWDAF notifies the consumernf to initiate NWDAF reselection.

8. The NWDAF carries UE related information (slice ID, location information, analysis ID) to NRF discover a target NWDAF that can provide service.

9. And according to the result returned by the NRF, the original NWDAF sends a switching request to the target NWDAF to request the target NWDAF to receive a user analysis task.

10. After the target NWDAF acknowledges the reply, relevant information (including the model) transfer begins. The target NWDAF notifies the original NWDAF that the acceptance has been completed after the information transfer is completed.

11. The target NWDAF/original NWDAF informs the consumer NF of finishing the NWDAF reselection; the original NWDAF notifies the source NF to unsubscribe from the acquisition request.

12. The target NWDAF discovers the source NF of the serving UE after handover based on the definition 23.288 and subscribes to the acquisition request.

Based on the same inventive concept, embodiments of the present invention further provide an NWDAF and a computer-readable storage medium, and since the principle of solving the problem of these devices is similar to the reselection decision method, the implementation of these devices may refer to the implementation of the method, and repeated details are not repeated.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

FIG. 7 is a schematic diagram of an NWDAF structure, as shown, including:

the processor 700, which is used to read the program in the memory 720, executes the following processes:

a transceiver 710 for receiving and transmitting data under the control of the processor 700.

In an implementation, the method further comprises the following steps:

and sending network data analysis information to the target NWDAF.

Where in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

An embodiment of the present invention further provides an NWDAF, including:

In an implementation, the method further comprises the following steps:

The embodiment of the invention also provides a computer readable storage medium, and the computer readable storage medium stores a computer program for executing the reselection decision method.

The specific implementation can be seen in the implementation of the reselection decision method on the NWDAF side.

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

In summary, in the technical solution provided in the embodiment of the present invention, the NWDAF subscribes to the AMF for the user position change; the source NWDAF has the capability of removing NRF to inquire the target NWDAF according to the new position information;

the source AMF transmits the position subscription information related to the NWDAF to the target AMF through a Namf _ Communication _ CreateUEContext Request;

the source NWDAF informs the consumer to perform NWDAF reselection;

the target NWDAF notifies the consumer of the completion of NWDAF reselection.

Therefore, the NWDAF is adopted to remove the NRF based on position change to find the target NWDAF to complete the reselection process, and the crossing degree of the intelligent analysis service process and the actual user service process is reduced.

The scheme covers two scenarios of user position change.

The method can be used for supplementing the deficiency of related scenes in the prior art and is easy for subsequent unified popularization.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A reselection decision method, comprising:

a network data analysis function (NWDAF) subscribes to a user position initiated by an access and mobility management function (AMF), wherein network data analysis services of the user are provided by the NWDAF;

2. The method of claim 1, wherein the location of the AMF notification is a location sent by the AMF upon determining that a routing area identity (TAI) of the subscriber has changed according to an NWDAF subscriber location subscription.

3. The method of claim 1, further comprising:

and the NWDAF inquires a target NWDAF of network data analysis service for the user after the position change from the network storage function NRF according to the changed position.

4. The method of claim 3, further comprising:

5. The method of claim 4, further comprising:

the NWDAF sends network data analysis information to the target NWDAF.

6. The method of claim 1, wherein the NWDAF initiating NWDAF reselection is notifying a consumer network functional entity consumer NF to initiate NWDAF reselection.

7. The method of claim 6, wherein the original NWDAF and/or the target NWDAF notify the consummer NF of an NWDAF reselection event, and the source NF is notified of the cancellation of the original subscription by the original NWDAF after reselection is completed.

8. An NWDAF, comprising:

9. An NWDAF, comprising:

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 7.