CN114071540B

CN114071540B - Subscription and processing method, network data analysis function and storage medium

Info

Publication number: CN114071540B
Application number: CN202110053612.7A
Authority: CN
Inventors: 王胡成
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-08-06
Filing date: 2021-01-15
Publication date: 2023-09-08
Anticipated expiration: 2041-01-15
Also published as: CN114071540A

Abstract

The invention discloses a subscription and processing method, a network data analysis function and a storage medium, comprising the following steps: c-NWDAF sends a subscription request to a first d-NWDAF, wherein the first d-NWDAF is the d-NWDAF of the current position of the UE covered by the service area; after receiving a notification that the UE of the first d-NWDAF moves out of the service range, determining a 5GC network function currently serving the UE, and determining a second d-NWDAF associated with the 5GC network function; or determining the position of the UE, and inquiring a second d-NWDAF capable of serving the UE according to the position of the UE; the c-NWDAF sends a subscription request to the second d-NWDAF. The invention can improve the analysis capacity of d-NWDAF; when the d-NWDAF needs to be changed due to the movement of the UE, the new d-NWDAF can be triggered rapidly to collect and analyze data of the target UE, and timeliness of data analysis is improved.

Description

Subscription and processing method, network data analysis function and storage medium

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a subscription and processing method, a network data analysis function, and a storage medium.

Background

Fig. 1 is a schematic diagram of a Network architecture supporting hierarchical NWDAF, where NWDAF (Network data analysis function, network data analytic function) is an operator-managed Network analysis function, and NWDAF can provide data analysis services to a 5GC (5G Core Network) Network function, AF (application function ) and OAM (operation administration maintenance, operation Administration and Maintenance). The analysis results may be historical statistics or predictions. The NWDAF may serve one or more network slices. The NWDAF may be deployed in the 5G network separately in the operator room, as a central NWDAF (central NWDAF), or may be combined with some 5G network functions, as distributed NWDAF (distributed NWDAF), and an architecture example of the two-stage NWDAF is given in fig. 1.

In the 5G network of fig. 1 supporting multiple NWDAFs, different NWDAF instances provide different data analysis, e.g., a central NWDAF may provide non-real time data analysis and a local NWDAF may provide more real time data analysis. In order for a consumer NF (Network Function) to find an appropriate NWDAF instance to provide a particular type of analysis, the NWDAF instance needs to provide its supporting analytical ID (analysis identity) when registering with the NRF (Network database Function, network Repository Function), which represents the analysis type. Thus the consumer NF can provide an analytical ID to indicate what type of analysis is needed when querying the NRF for NWDAF instances.

Fig. 2 is a schematic diagram of a multi-NWDAF collaboration flow based on information registration, where, as shown in the fig. 2, in this multi-NWDAF collaboration architecture, sub-NWDAF (sub-NWDAF) may be service specific analysis ID or co-located with some NF, sub-NWDAF needs to register to central NWDAF, and provide supported analysis ID and deployment related factors.

When a consumer NF requests a specified type of analysis, first the central NWDAF is looked up by the NRF, and then it is known by the central NWDAF which sub-NWDAFs can provide data analysis from the registration information of the sub-NWDAF, for example, the target sub-NWDAF is determined from the service scope of the sub-NWDAF. The central NWDAF then requests the data analysis result from the specified sub-NWDAF, and the central NWDAF may also send IDs of other cooperative sub-NWDAFs to the specified sub-NWDAF. Such a designation of sub-NWDAF may cooperate with other sub-NWDAFs to produce a final analysis result.

A disadvantage of the prior art is that there is unnecessary overhead in how the existing c-NWDAF cooperates with multiple d-NWDAFs.

Disclosure of Invention

The invention provides a subscription and processing method, a network data analysis function and a storage medium, which are used for solving the problem that unnecessary system overhead exists in a mode of cooperation of c-NWDAF and a plurality of d-NWDAF.

The invention provides the following technical scheme:

a subscription method, comprising:

c-NWDAF sends a subscription request to a first d-NWDAF, wherein the first d-NWDAF is the d-NWDAF of the current position of the UE covered by the service area;

c-NWDAF determines a 5GC network function currently serving the UE after receiving a notification that the UE of a first d-NWDAF moves out of a service range thereof, and determines a second d-NWDAF associated with the 5GC network function; or determining the position of the UE, and inquiring a second d-NWDAF capable of serving the UE according to the position of the UE;

the c-NWDAF sends a subscription request to the second d-NWDAF.

In an implementation, after the c-NWDAF sends the subscription request to the second d-NWDAF, the method further includes:

a suspend or unsubscribe indication is sent to the first d-NWDAF.

In practice, further comprising:

and c-NWDAF receives a data analysis result sent by a third d-NWDAF, wherein the data analysis result is the historical data analysis of the UE.

In implementation, the notification that the UE of the first d-NWDAF moves out of its service range, which is received by the c-NWDAF, is sent after the first d-NWDAF determines that the UE moves out of its service range according to event reporting of NF serving the UE.

In implementation, determining the position of the UE is obtaining the UE position from a first d-NWDAF; or, subscribing the location information of the UE to the AMF.

A subscription processing method, comprising:

d-NWDAF receives the subscription request of c-NWDAF and subscribes 5GC NF information of the current service UE to UDM;

d-NWDAF receives a notification of service 5GC NF of the UE sent by UDM;

the d-NWDAF decides whether to perform data analysis according to whether the 5GC NF is within the service range, and/or, after the UE moves out of its service range, the d-NWDAF notifies the c-NWDAF.

In practice, the d-NWDAF decides whether to perform data analysis according to whether the 5GC NF is within service range, including:

if the 5GC NF is not in its service range, the d-NWDAF performing the data analysis stops the data collection and analysis for the UE, and if the 5GC NF is in its service range, the NWDAF not performing the data analysis starts to perform the data collection and analysis for the UE.

In practice, the d-NWDAF determines whether the UE moves out of service according to the notification of the UDM.

In an implementation, after the d-NWDAF receives the subscription request sent by the c-NWDAF, the method further includes:

after receiving the suspension indication sent by the c-NWDAF, suspending data collection and analysis for the UE.

In an implementation, after the UE moves out of its service range, the d-NWDAF further includes:

and if the historical data analysis of the UE exists, sending a data analysis result to the c-NWDAF.

An NWDAF, when the NWDAF is a c-NWDAF, comprising:

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

a subscription request is sent to a first d-NWDAF, wherein the first d-NWDAF is the d-NWDAF of the current position of the UE covered by a service area;

after receiving a notification that the UE of a first d-NWDAF moves out of a service range of the UE, determining a 5GC network function currently serving the UE, and determining a second d-NWDAF associated with the 5GC network function; or determining the position of the UE, and inquiring a second d-NWDAF capable of serving the UE according to the position of the UE;

sending a subscription request to a second d-NWDAF;

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

In an implementation, after sending the subscription request to the second d-NWDAF, the method further includes:

a suspend or unsubscribe indication is sent to the first d-NWDAF.

In practice, further comprising:

and receiving a data analysis result sent by a third d-NWDAF, wherein the data analysis result is the historical data analysis of the UE.

In implementation, the received notification that the UE of the first d-NWDAF moves out of its service range is sent after the first d-NWDAF determines that the UE moves out of its service range according to event reporting of NF serving the UE.

An NWDAF, when the NWDAF is a d-NWDAF, comprising:

after receiving the subscription request of c-NWDAF, subscribing 5GC NF information of the current service UE to the UDM;

receiving a notification of service 5GC NF of the UE sent by the UDM;

determining whether to execute data analysis according to whether the 5GC NF is in a service range, and/or notifying the c-NWDAF after the UE moves out of the service range;

In practice, determining whether to perform data analysis according to whether the 5GC NF is within service range includes:

In practice, it is determined whether the UE is out of service based on the notification of the UDM.

In an implementation, after receiving a subscription request sent by the c-NWDAF, the method further includes:

In an implementation, after the UE moves out of its service range, the method further includes:

A subscribing device, comprising:

the c-NWDAF subscription module is used for sending a subscription request to a first d-NWDAF, wherein the first d-NWDAF is d-NWDAF of a current position of the UE covered by a service area;

a c-NWDAF determining module, configured to determine a 5GC network function currently serving the UE after receiving a notification that the UE of a first d-NWDAF moves out of its service range, and determine a second d-NWDAF associated with the 5GC network function; or determining the position of the UE, and inquiring a second d-NWDAF capable of serving the UE according to the position of the UE;

the c-NWDAF subscription module is further configured to send a subscription request to the second d-NWDAF.

A subscription processing device, comprising:

d-NWDAF subscription module, which is used to subscribe the 5GC NF information of the current service UE to the UDM after receiving the subscription request of c-NWDAF;

A d-NWDAF receiving module, configured to receive a notification of service 5GC NF of the UE sent by the UDM;

and the d-NWDAF processing module is used for deciding whether to execute data analysis according to whether the 5GC NF is in the service range or not, and/or notifying the c-NWDAF after the UE moves out of the service range.

A computer-readable storage medium storing a computer program that executes the above-described subscription method and/or subscription processing method.

The invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, after the c-NWDAF receives the notification that the UE of the first d-NWDAF moves out of the service range, determining a 5GC network function serving the UE currently, and determining a second d-NWDAF associated with the 5GC network function; or after receiving the notification that the UE of the first d-NWDAF moves out of the service range, the c-NWDAF determines the position of the UE and inquires a second d-NWDAF capable of serving the UE according to the position of the UE; the c-NWDAF then sends a subscription request to the second d-NWDAF.

For d-NWDAF, since d-NWDAF decides whether to perform data analysis according to whether 5GC NF is within service range, and/or d-NWDAF notifies c-NWDAF after the UE moves out of its service range.

Therefore, d-NWDAF, which is not in its service range at present, needs to keep data collection and analysis of UE, and report analysis result to c-NWDAF, so as to improve analysis capacity of d-NWDAF;

when the d-NWDAF needs to be changed due to the movement of the UE, the new d-NWDAF can be triggered rapidly to collect and analyze data of the target UE, and timeliness of data analysis is improved.

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 do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic diagram of a network architecture supporting hierarchical NWDAF in the background art;

fig. 2 is a schematic diagram of a multi-NWDAF collaboration flow based on information registration in the background art;

FIG. 3 is a schematic diagram of a multi-layer NWDAF architecture in accordance with an embodiment of the present invention;

fig. 4 is a schematic flow chart of a subscription method implementation of a c-NWDAF side in an embodiment of the present invention;

fig. 5 is a schematic flow chart of implementation of a d-NWDAF side subscription processing method in an embodiment of the present invention;

FIG. 6 is a schematic flow chart of subscription processing implementation in embodiment 1 of the present invention;

FIG. 7 is a schematic flow chart of subscription processing implementation in embodiment 2 of the present invention;

FIG. 8 is a schematic flow chart of subscription processing implementation in embodiment 3 of the present invention;

FIG. 9 is a schematic flow chart of subscription processing implementation in embodiment 4 of the present invention;

FIG. 10 is a schematic flow chart of subscription processing implementation in embodiment 5 of the present invention;

FIG. 11 is a schematic flow chart of subscription processing implementation in embodiment 6 of the present invention;

fig. 12 is a schematic diagram of NWDAF structure in an embodiment of the invention;

fig. 13 is a schematic diagram of NWDAF structure in the second embodiment of the present invention.

Detailed Description

The inventors noted during the course of the invention that:

in eNA (network automation enabled technology, enablers for Network Automation) project, a multi-stage NWDAF architecture was introduced in 5GC, where some NFs might embed NWDAF modules, i.e. NF and NWDAF co-located. In this environment, centralized NWDAF (abbreviated as "c-NWDAF" in the application) receiving the analysis request may need to define data analysis results for multiple distributed distributed NWDAF (abbreviated as "d-NWDAF" in the application), for example, for UE mobility (User Equipment mobility) within a specified range, the d-NWDAF related analysis needs to be provided in conjunction with multiple different AMFs (access and mobility management functions, access and Mobility Management Function). While for some UE-related data, such as abnormal behavior analytics (abnormal behavior analysis), NWDAF may need to monitor the UE behavior for a long time, which results in c-NWDAF needing to keep a data analysis subscription to multiple d-NWDAFs.

However, at the same time, the UE will only be served by one distributed NWDAF, and if the c-NWDAF subscribes UE related analytics to multiple d-NWDAFs, unnecessary overhead will be incurred, for example, the d-NWDAF of the non-served UE also needs to keep reporting to UE related analytics.

That is, in the prior art scheme, the c-NWDAF always maintains the d-NWDAF subscription data analysis to the designated area, so there is at least one of the following drawbacks:

1. the d-NWDAF, which is not currently serving the UE, also receives an analysis subscription request of the c-NWDAF, so that it is necessary to maintain data analysis of the UE and report the analysis result to the c-NWDAF.

2. When the UE movement causes a change in serving d-NWDAF, the new d-NWDAF cannot trigger data collection and analysis of the target UE quickly.

Based on this, in the embodiment of the present invention, a scheme is provided in which the c-NWDAF defines the UE-related data analysis result from the d-NWDAF, so that the c-NWDAF and the d-NWDAF can avoid establishing an unnecessary data subscription relationship.

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

In the description process, the implementation of the c-NWDAF and d-NWDAF sides will be described respectively, functional entities such as 5GC NF and UDM will be also referred to in the description process, and then an example of the implementation of the foregoing will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such description does not mean that they must be carried out in cooperation or must be carried out separately, in fact, they each solve the problem on their own side when they are carried out separately, while they are used in combination with better technical results.

Fig. 3 is a schematic diagram of a multi-layer NWDAF structure, and the following scheme may be implemented at least in a configuration supporting multi-layer NWDAF as shown.

Fig. 4 is a schematic flow chart of a subscription method implementation on the c-NWDAF side, and as shown in the drawing, may include:

step 401, the DAF sends a subscription request to a first d-NWDAF, where the first d-NWDAF is the d-NWDAF where the service area covers the current location of the UE;

step 402, c-NWDAF determines a 5GC network function currently serving the UE after receiving a notification that the UE of the first d-NWDAF moves out of its service range, and determines a second d-NWDAF associated with the 5GC network function; or determining the position of the UE, and inquiring a second d-NWDAF capable of serving the UE according to the position of the UE;

step 403, c-NWDAF sends a subscription request to the second d-NWDAF.

The c-NWDAF may send an NF query request to the NRF, where the request message carries the UE location information, so as to query a second d-NWDAF capable of serving the current location of the UE.

a suspend or unsubscribe indication is sent to the first d-NWDAF.

In practice, the method may further comprise:

Specifically, the third d-NWDAF is that the UE cannot perform data analysis because the UE is not in its service area, but there is a historical data analysis of the UE.

Specifically, the c-NWDAF determines the position of the UE, and obtains the UE position from the first d-NWDAF; or, subscribing the location information of the UE to the AMF.

Fig. 5 is a schematic flow chart of implementation of a d-NWDAF side subscription processing method, which may include:

step 501, after d-NWDAF receives a subscription request of c-NWDAF, subscribing 5GC NF information of the current service UE to UDM;

step 502, d-NWDAF receives notification of service 5GC NF of the UE sent by UDM;

step 503, d-NWDAF decides whether to perform data analysis according to whether 5GC NF is in service range, and/or d-NWDAF notifies c-NWDAF after the UE moves out of service range.

Wherein, after the UE moves out of its service range, the d-NWDAF informs the c-NWDAF to be mainly described in scheme one, and the d-NWDAF decides whether to perform the data analysis according to whether the 5GC NF is in the service range or not is mainly described in scheme two.

Scheme 1:

1. c-NWDAF sends a subscription request to a first d-NWDAF, wherein the first d-NWDAF is the d-NWDAF of the current position of the UE covered by the service area;

c-NWDAF receives the notice of the UE moving out of the service range of the first d-NWDAF, searches the 5GC network function of the current service UE, and determines a second d-NWDAF associated with the 5GC network function; the first d-NWDAF determines that the UE moves out of its service range according to the notification of the UDM.

The c-NWDAF sends a subscription request to the second d-NWDAF.

The specific method can be as follows:

1. the c-NWDAF receives an analysis request from a consumer NF, wherein the filtering conditions carried by the analysis request include an area of interest (area). c-NWDAF inquires NRF according to Area of interest, obtains d-NWDAF list of the current service Area, inquires UDM according to UE ID, and obtains AMF or SMF of current service UE.

2. If the AMF or SMF of the service UE is found to have d-NWDAF to provide service and the d-NWDAF is in the NWDAF list, a subscription request is sent to the d-NWDAF, and a query request is sent to other d-NWDAF in the list or a data analysis suspension is indicated.

3. When the UE moves out of the service range of the current d-NWDAF, the d-NWDAF informs the c-NWDAF that the analysis of the UE is finished;

4. c-NWDAF inquires the UDM again to acquire the SMF or AMF of the UE. In the same step 2, if the AMF or SMF of the service UE is found to have d-NWDAF to provide service and the d-NWDAF is in the d-NWDAF list, a subscription request is sent to the d-NWDAF.

Example 1

In this example, the c-NWDAF sends a data analysis subscription request to the designated d-NWDAF according to the request of consumer NF.

FIG. 6 is a schematic flow chart of subscription processing implementation in embodiment 1, and as shown in the figure, may include:

1. The c-NWDAF receives an analysis request (Analytics Request) from the consumer NF, wherein the analysis request carries an analysis ID and filtering conditions, including an area of interest (UE ID), and the like. c-NWDAF inquires NRF according to Area of interest, obtains d-NWDAF list of the current service Area, inquires UDM according to UE ID, and obtains 5GC NF (AMF or SMF) of the current service UE. See in particular the related implementations of the prior art.

2. The c-NWDAF determines the d-NWDAF associated with the current serving UE according to the 5GC NF (AMF/SMF), and marks the d-NWDAF as a serving d-NWDAF (Identify the d-NWDAF which is associated with the NF serving the UE). See in particular the related implementations of the prior art.

3. The c-NWDAF sends a data analysis result of the nnwdaf_analysis subscription_subscription to the service d-NWDAF, and requests the d-NWDAF to provide a data analysis result indicated by an analysis ID (analysis identifier) in a specified area (intersection of the area of interest and the service d-NWDAF). d-NWDAF uses nudm_sdm_subscience (Nudm SDM subscription; SDM: subscription data management, subscription Data Management) service to Subscribe to UDM (unified data management entity, unified Data Management) for 5GC NF information of the currently serving UE according to the UE ID.

4. The c-NWDAF sends to other d-NWDAFs in the list, respectively, a nwdaf_analyticinfo_request (NWDAF analysis information Request) requesting the d-NWDAF to provide once a history data analysis result indicated by an analytics ID in a specified area (intersection of area and the d-NWDAF service area).

5. The service d-NWDAF performs data collection and data analysis, and then transmits a data analysis result nnwdaf_analysis subscription_notification (NWDAF analysis subscription notification) to the c-NWDAF.

6. The other d-NWDAF determines that the UE is not in its service area and thus cannot perform data analysis, but if it has a history data analysis of the UE and satisfies a filtering condition in the data analysis request, the data analysis result may be provided in a Response to c-NWDAF, nnwdaf analysis info_response (NWDAF analysis information Response).

7. The c-NWDAF generates a data analysis result Analytics Response (analysis response) fed back to the consumer NF according to the data analysis result provided by the d-NWDAF, carrying an analysis ID, analysis result.

Example 2

In this example, the c-NWDAF indicates a pending data analysis request to the d-NWDAF according to the request of the consumer NF.

Fig. 7 is a schematic flow chart of subscription processing implementation in embodiment 2, which may include:

1-2, see example 1.

1. The c-NWDAF receives an analysis request from the consumer NF, wherein the analysis request carries an analysis ID and filtering conditions, including an area of interest (area), a UE ID, etc. c-NWDAF inquires NRF (network function database function, network Repository Function) according to Area of interest, obtains d-NWDAF list of the current service Area, inquires UDM according to UE ID, and obtains 5GC NF (AMF or SMF) of the current service UE. See in particular the prior art practice.

2. The c-NWDAF determines the d-NWDAF associated with the current serving UE according to the 5GC NF (AMF/SMF) and marks the d-NWDAF as the serving d-NWDAF. See in particular the prior art practice.

3. The c-NWDAF sends the data analysis result of the nnwdaf_analysis subscribers to the d-NWDAF, requesting the d-NWDAF to provide the data analysis result indicated by the analysis ID in the specified area (intersection of area and d-NWDAF).

4. The c-NWDAF sends nnwdaf_analysis subscription_subscription data analysis results to other d-NWDAFs in the list, respectively, but sends suspension indications to these d-NWDAFs so that these d-NWDAFs do not need to perform data collection and data analysis.

The other means here that when the c-NWDAF initially determines that the d-NWDAF associated with 5GC NF serving the UE transmits a subscription request, a suspension instruction is transmitted to the d-NWDAF other than the d-NWDAF.

5. The service d-NWDAF performs data gathering and data analysis, and then transmits the data analysis result to the c-NWDAF.

6. The other d-NWDAF temporarily does not perform data analysis, but if there is a historical data analysis of the UE and the filtering condition in the data analysis request is satisfied, reports the historical data analysis result of the UE to the c-NWDAF.

7. And c-NWDAF generates a data analysis result fed back to the consumer NF according to the data analysis result provided by d-NWDAF.

Example 3

In this example, the UE notifies the c-NWDAF after moving out of the current d-NWDAF service range.

FIG. 8 is a schematic flow chart of subscription processing implementation in embodiment 3, and as shown in the figure, may include:

1-2, c-NWDAF requests the data analysis result nnwdaf_analysis description_subsystem/Notify of the UE from the service d-NWDAF. The d-NWDAF1 performs Data gathering (Data collection) and Data analysis. See in particular the prior art practice.

3. When the UE moves out of service range of service d-NWDAF1, service d-NWDAF needs to report to c-NWDAF. The service d-NWDAF determines that the UE moves out of its service area (UE moves out of d-NWDAF1 serving area) according to the 5GC NF information provided in the nudm_sdm_notification sent by the UDM or the event report of the 5GC NF in the data collection report. When reporting to the c-NWDAF, the service d-NWDAF needs to provide an indication to the c-NWDAF, for example, the indication content may be: the UE moves out of service or the last analysis report nnwdaf_analysis description Notify (final report indication), etc.

4. After the c-NWDAF receives the indication of the d-NWDAF, it inquires about 5GC NF (AMF/SMF) of the UE currently served by the UDM again, and further determines d-NWDAF2 (Query new 5GC NF serving the UE,and identify d-NWDAF2 serving the 5GC NF) serving the 5GC NF according to the 5GC NF information.

5. c-NWDAF sends data analysis to new service d-NWDAF2 subscription request nnwdaf_analytics subscription_subscription/Notify. Thereby triggering the d-NWDAF2 to perform data collection and data analysis for the UE.

6. The c-NWDAF may send a UnSubscribe request nnwdaf_analytics description_un subscribe to the source service d-NWDAF 1.

Example 4

Fig. 9 is a schematic flow chart of subscription processing implementation in embodiment 4, which may include:

3. When the UE moves out of service range of service d-NWDAF1, service d-NWDAF needs to report to c-NWDAF. The serving d-NWDAF determines that the UE moves out of its service area (UE moves out of d-NWDAF1 serving area) from the event report of 5GC NF in the data gathering report. When reporting to the c-NWDAF, the service d-NWDAF needs to provide an indication to the c-NWDAF, where the indication content may be: the UE moves out of service or the last analysis report nnwdaf_analysis description Notify (final report indication), etc.

4. After the c-NWDAF receives the indication of the d-NWDAF, the 5GC NF (AMF/SMF) of the UE currently served by the UDM is queried again. And further determines d-NWDAF2 (Query new 5GC NF serving the UE,and identify d-NWDAF2 serving the 5GC NF) serving the 5GC NF based on the 5GC NF information.

Scheme 2:

d-NWDAF receives notification of service 5GC NF of the UE of the UDM;

if the 5GC NF is not in its service range, the NWDAF performing the data analysis stops the data gathering and analysis for that UE. If the 5GC NF is in its service range, the NWDAF that did not perform the data analysis starts to perform the data gathering and analysis for that UE.

The method can be concretely as follows:

1. the c-NWDAF receives an analysis request from a consumer NF, wherein the filtering conditions carried by the analysis request include an area of interest (area). c-NWDAF queries NRF according to Area of interest, obtaining a list of d-NWDAFs currently serving the region.

2. The c-NWDAF sends a data analysis subscription request to the d-NWDAF. The d-NWDAF subscribes to the UDM for 5GC NF (AMF/SMF) information of the serving UE according to the request.

3. If the 5GC NF received by the d-NWDAF from the UDM is not in its service range, the d-NWDAF does not initiate data analysis for the UE, and if there is a historical data analysis available for the UE, only reports its historical analysis to the c-NWDAF. Otherwise, data analysis is performed and a report is sent to the c-NWDAF.

4. After the UE moves out of the service range of the current 5GC NF, the UDM sends a notification to d-NWDAFs subscribed to the 5GC NF of the UE, and each d-NWDAF executes 3 again.

Example 5

In this example, the d-NWDAF queries the 5GC NF of the serving UE from the UDM and determines whether to perform data analysis.

FIG. 10 is a schematic flow chart of subscription processing implementation in embodiment 5, and as shown in the figure, may include:

1-2, c-NWDAF receives an analysis request Analytics Request (analysis ID, analytics filters) from a consumer NF, wherein the analysis request carries an analysis ID and filtering conditions, including an area of interest (UE ID), etc. c-NWDAF queries NRF according to Area of interest, obtaining a list of d-NWDAFs currently serving the region. See in particular the prior art practice.

3. The c-NWDAF subscribes to the data analysis result nnwdaf_analytics description_ Subscribe (Analytics ID) for the UE to each d-NWDAF in the searched d-NWDAF list. See in particular the prior art practice.

4. d-NWDAF receiving the data analysis subscription request sends a request to UDM according to UE ID, subscribes to information Nudm_SDM_subscriber/Notification of 5GC NF of the current service UE. The d-NWDAF determines what 5GC NF information is requested from the UDM according to the analysis ID, for example, the analysis ID indicates UE mobility analytics, and then determines the type of the target 5GC NF is AMF; the analysis ID indicates abnormal behaviour analytics, then the target 5GC NF type is determined to be AMF and SMF.

The UDM feeds back 5GC NF information of the serving UE to the 5GC NF according to the subscription request, and then, once the AMF of the serving UE changes, the d-NWDAFs will be notified again.

And 5-6, if the d-NWDAF is associated with the current service UE according to the searched 5GC NF of the UE, determining whether the UE is in the service range. Thereby performing data gathering and data analysis for the UE (executing data analytics). After the analysis is completed, the analysis result nnwdaf_analysis description_notify is reported to the c-NWDAF.

7. If the d-NWDAF is out of its service range according to the found 5GC NF of the currently serving UE, it is determined that data gathering and data analysis for the UE are not performed. If the d-NWDAF has valid historical data analysis for the UE, only reporting its historical analysis result nnwdaf_analysis description_ Notify (historical analytics) to the c-NWDAF.

8. The c-NWDAF generates a data analysis result Analytics Response (analysis ID, analysis result) fed back to the consumer NF from the data analysis result provided by the d-NWDAF.

Example 6

In this example, a 5GC NF change resulted in a d-NWDAF change to perform the data analysis.

FIG. 11 is a schematic flow chart of subscription processing implementation in embodiment 6, which may include:

0. d-NWDAF1 is performing data analysis on the UE (executing data analytics).

1. The UE moves out of service range of the current 5GC NF, resulting in a 5GC NF change, e.g., AMF or SMF change (AMF/SMF serving UE changes), of the serving UE. The 5GC NF of the new serving UE will register with the UDM. See in particular the prior art practice.

2. When the UDM receives registration of a new 5GC NF of the serving UE, it will send Notification nudm_sdm_notification (new AMF/SMF ID) of 5GC NF change of the serving UE to the relevant d-NWDAF according to subscription of each d-NWDAF.

3. After receiving the new 5GC NF information of the service UE, the current service d-NWDAF1 determines whether the 5GC NF is related to the new 5GC NF, if so, continues to collect data from the new 5GC NF and performs data analysis. If not, data collection and data analysis is stopped (stoping data analytics).

4. After receiving the new 5GC NF information of the serving UE, the other d-NWDAF starts to collect data from the new 5GC NF and perform data analysis if it is determined that the 5GC NF is associated with the new 5GC NF, otherwise does not perform any action (starting data collection and executing data analytics).

5. The new service d-NWDAF2 provides the data analysis result nnwdaf_analysis description_notify to the c-NWDAF.

Based on the same inventive concept, the embodiments of the present invention further provide an NWDAF, a subscription apparatus, a subscription processing apparatus, and a computer readable storage medium, and since the principle of solving the problem of these devices is similar to that of the subscription method and the subscription processing method, the implementation of these devices may refer to the implementation of the method, and the repetition is omitted.

In implementing the technical scheme provided by the embodiment of the invention, the method can be implemented as follows.

Fig. 12 is a schematic diagram of NWDAF structure one, and as shown in the drawing, when the NWDAF is used as the c-NWDAF, the NWDAF includes:

processor 1200 for reading the program in memory 1220, performs the following process:

Sending a subscription request to a second d-NWDAF;

a transceiver 1210 for receiving and transmitting data under the control of the processor 1200.

a suspend or unsubscribe indication is sent to the first d-NWDAF.

In practice, further comprising:

Wherein in fig. 12, a bus architecture may comprise any number of interconnected buses and bridges, and in particular, one or more processors represented by processor 1200 and various circuits of memory represented by memory 1220, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1210 may be a number of elements, i.e. include a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

A subscribing device, comprising:

The implementation of the subscription method on the c-NWDAF side can be seen in particular.

For convenience of description, the parts of the above apparatus are described as being functionally divided into various modules or units, respectively. Of course, the functions of each module or unit may be implemented in the same piece or pieces of software or hardware when implementing the present invention.

Fig. 13 is a second schematic NWDAF structure, as shown, including:

processor 1300, for reading the program in memory 1320, performs the following procedure:

Receiving a notification of service 5GC NF of the UE sent by the UDM;

a transceiver 1310 for receiving and transmitting data under the control of the processor 1300.

Where in FIG. 13, a bus architecture may comprise any number of interconnected buses and bridges, with various circuits of the one or more processors, specifically represented by processor 1300, and the memory, represented by memory 1320, being linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements, i.e., include a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.

A subscription processing device, comprising:

The implementation of the subscription processing method of the d-NWDAF side can be referred to specifically.

The implementation of the subscription method on the c-NWDAF side and/or the subscription processing method on the d-NWDAF side can be referred to specifically.

In summary, in the technical solution provided in the embodiments of the present invention,

c-NWDAF sends a subscription request to a first d-NWDAF, wherein the first d-NWDAF is the d-NWDAF of the current position of the UE covered by the service area; c-NWDAF receives the notice of the UE moving out of the service range of the first d-NWDAF, searches the 5GC network function of the current service UE, and determines a second d-NWDAF associated with the 5GC network function; or after the c-NWDAF receives a notification that the UE moves out of its service range from the first d-NWDAF, determining the location of the UE, and querying a second d-NWDAF capable of serving the UE according to the location of the UE; the first d-NWDAF determines that the UE moves out of the service range according to the notification of the UDM; the c-NWDAF sends a subscription request to the second d-NWDAF.

d-NWDAF receives the subscription request of c-NWDAF and subscribes 5GC NF information of the current service UE to UDM; d-NWDAF receives notification of service 5GC NF of the UE of the UDM; if the 5GC NF is not in its service range, the NWDAF performing the data analysis stops the data gathering and analysis for that UE. If the 5GC NF is in its service range, the NWDAF that did not perform the data analysis starts to perform the data gathering and analysis for that UE.

Therefore, the scheme can avoid that the d-NWAF of the current UE which is not in the service range also needs to keep data collection and analysis of the UE and report the analysis result to the c-NWAF, thereby improving the analysis capacity of the d-NWAF;

It will be appreciated by those skilled in the art that 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, magnetic 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A subscription method, comprising:

the central network data analysis function c-NWDAF sends a subscription request to a first distributed network data analysis function d-NWDAF, wherein the first d-NWDAF is d-NWDAF of a service area coverage User Equipment (UE) at the current position;

after receiving a notification that the UE of a first d-NWDAF moves out of the service range, the c-NWDAF determines a 5G core network (5 GC) network function currently serving the UE, and determines a second d-NWDAF associated with the 5GC network function; or determining the position of the UE, and inquiring a second d-NWDAF capable of serving the UE according to the position of the UE;

The c-NWDAF sends a subscription request to the second d-NWDAF.

2. The method of claim 1, wherein after the c-NWDAF sends the subscription request to the second d-NWDAF, further comprising:

a suspend or unsubscribe indication is sent to the first d-NWDAF.

3. The method as recited in claim 1, further comprising:

4. The method of claim 1, wherein the notification received by the c-NWDAF that the UE of the first d-NWDAF moved out of its service range is sent after the first d-NWDAF determines that the UE moved out of its service range based on an event report of NF serving the UE.

5. The method of claim 1, wherein determining the location of the UE is obtaining a UE location from a first d-NWDAF; or, subscribing the location information of the UE to the AMF.

6. A subscription processing method, comprising:

d-NWDAF receives the subscription request of c-NWDAF, and subscribes 5GC network function entity NF information of the current service UE to a unified data management entity UDM;

d-NWDAF receives a notification of service 5GC NF of the UE sent by UDM;

7. The method of claim 6, wherein the d-NWDAF decides whether to perform the data analysis based on whether the 5GC NF is within service range, comprising:

8. The method of claim 6, wherein the d-NWDAF determines whether the UE is out of service based on the notification of the UDM.

9. The method of claim 6, wherein after the d-NWDAF receives the subscription request sent by the c-NWDAF, further comprising:

10. The method of claim 6, wherein d-NWDAF further comprises, after the UE moves out of its service range:

11. An NWDAF, wherein when the NWDAF is used as a c-NWDAF, comprising:

sending a subscription request to a second d-NWDAF;

12. The NWDAF of claim 11, wherein after sending the subscription request to the second d-NWDAF, further comprising:

a suspend or unsubscribe indication is sent to the first d-NWDAF.

13. The NWDAF of claim 11, further comprising:

14. The NWDAF of claim 11, wherein the received notification of the UE of the first d-NWDAF moving out of its service range is sent after the first d-NWDAF determines from an event report of NF serving the UE that the UE moved out of its service range.

15. The NWDAF of claim 11, wherein determining the location of the UE is to obtain a UE location from a first d-NWDAF; or, subscribing the location information of the UE to the AMF.

16. An NWDAF, wherein when the NWDAF is a d-NWDAF, comprising:

receiving a notification of service 5GC NF of the UE sent by the UDM;

17. The NWDAF of claim 16, wherein determining whether to perform the data analysis based on whether the 5GC NF is within service range comprises:

18. The NWDAF of claim 16, wherein the determination of whether the UE is out of service is based on a notification of the UDM.

19. The NWDAF of claim 16, wherein upon receiving the subscription request sent by the c-NWDAF, further comprising:

20. The NWDAF of claim 16, wherein after the UE moves out of its service range, further comprising:

21. A subscribing device, comprising:

22. A subscription processing device, comprising:

23. 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 10.