CN115334493A - Method, device and device for status subscription notification - Google Patents

Abstract

The invention provides a method, a device and equipment for state subscription notification, wherein the method comprises the following steps: a first network function NF triggers and detects service flow according to strategy information, wherein the first NF is relevant to session management; the first NF informs a second NF of the start and the end of the service flow; the second NF is associated with access management. The scheme of the invention avoids the flow of the second NF accessing the session binding support function BSF and the first NF, and reduces the signaling overhead.

Description

Method, device and equipment for status subscription notification

technical field

The present invention relates to the field of communication technology, in particular to a method, device and equipment for status subscription notification.

Background technique

At present, it is considered to introduce dynamic control of access management policies (AM Policies) to 5G networks, and dynamically issue access technology/frequency selection priority parameters to achieve capacity management and enhanced coverage. It is necessary to consider triggering AM policies based on third-party or application detection. Dynamically changing scenes.

The existing technical solution requires addressing the BSF (User Session Binding Function) responsible for session binding through the user code number, which will lead to redundant deployment of the BSF; in addition, the existing session binding BSF is deployed in the visiting place, independently or in conjunction with SMF (session management function) is set up together to serve different IP address segments, and stores user ID, DNN (content management system), UE address (IP address or MAC address, etc.), SMF for each PDU Session (protocol data unit session) Session binding information such as the address of the selected PCF (Policy Control Function) to ensure that the AF (Access Function) provides PCF address query services for the AF or NEF (Network Opening Function) when identifying the UE's service transmission policy based on the UE address , realizing that the N5/Rx interface is addressed to the PCF corresponding to the PDUsession (protocol data unit session) of the UE service.

To bind the BSF through the user code number addressing session, the BSF needs to go to the NRF (NR storage function) to register the user number segment, and the user number segment cannot be repeated. In this way, BSF is in the visiting place and co-established with SMF cannot meet the demand. There is a requirement that BSFs are deployed by user number segment and that the BSF serving the IP address segment performs session binding information synchronization with the BSF deployed by user number segment. This brings about the data consistency problem of BSF redundant deployment and real-time synchronization of a large number of session binding information between visiting site and home site, and many-to-many BSFs.

In addition, AM PCF (policy control function of access management) is based on DNN and S-NSSAI (network slice selection auxiliary information) and the number of BSFs discovered by BSF through NRF is very large (hundreds) in the case of SMF/BSF co-establishment , the profile (document) of BSF maintained by AM PCF and the subscription resource address to subscribe to BSF are huge, but only one BSF can match the subscription, and other subscriptions and BSF processing are invalid.

Contents of the invention

The technical problem to be solved by the present invention is how to provide a method for status subscription notification. The process of accessing the PCF for access management to the BSF and PCF for session management is avoided, and signaling overhead is reduced.

In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows:

A method for status subscription notifications, comprising:

The first network function NF triggers the detection of the service flow according to the policy information;

The first NF notifies the second NF of the start and end of the service flow.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF subscribes policy information to the unified data warehouse function UDR, and after receiving the policy information notified by the UDR, detects the service flow of the user's protocol data unit PDU session.

Optionally, after the user's protocol data unit PDU session is established, the first NF subscribes to the policy information from the UDR, and detects the service flow of the user's PDU session after receiving the policy information notified by the UDR. Optionally, the first PCF triggers detection of service flows according to policy information, including:

The first NF receives the subscription request sent by the second NF, and the subscription request is used for establishing a PDU session of the subscribing user;

The first NF obtains policy information according to the subscription request, and detects the service flow of the user's protocol data unit PDU session according to the policy information.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF receives a second subscription request sent by the second NF, and the second subscription request is used for subscribing to a service flow state;

In the case of receiving the second subscription request, the first NF triggers detection of the service flow;

Wherein, the second subscription request is sent after the second NF confirms that the user's PDU session is established.

Optionally, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the relevant information of the first NF, confirming the establishment of the user's PDU session;

Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF.

Optionally, the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or sent by the third NF.

Optionally, the second NF receives relevant information of the first NF and sends it for the first NF or the third NF.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF receives the first subscription request sent by the second NF, and the first subscription request is used for establishing a PDU session of the subscribing user;

Or, the first NF receives the first indication sent by the second NF, and the first indication is used for requesting or indicating: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established;

The first NF notifies the second NF when the user's PDU session is established, and the second NF sends a second subscription request to the first NF, the second subscription request is used to subscribe to the service flow status of the PDU session, The first NF detects the service flow of the user's PDU session according to the second subscription request.

Optionally, the first subscription request or the first indication carries a DNN and/or a slice identifier.

Optionally, the first subscription request carries related information of the second NF;

or

The first indication carries related information of the second NF;

Wherein, the relevant information of the second NF includes: at least one item of the second NF identifier and the second NF address.

Optionally, the method also includes:

After the user's PDU session is established, the first NF subscribes the policy information to the UDR;

After the user's PDU session is established, the first NF notifies the second NF, including:

After receiving the policy information notified by the UDR, send a notification message to the second NF, where the notification message is used to notify the second NF of the establishment of the PDU session of the user.

Optionally, after receiving the policy information notified by the UDR, before sending the notification message to the second NF, the method further includes:

Determine the second NF.

Optionally, the determining the second NF includes:

The first NF queries the binding support function BSF with the relevant information of the second NF according to the user's information or identification, and determines the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the determining the second NF includes:

The first NF obtains the relevant information of the second NF from the UDR according to the user's information or identifier, and determines the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the determining the second NF includes:

receiving the relevant information of the second NF carried when the UDR notifies the policy information, and determining the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, in the case where the notification of the establishment of the user's PDU session received by the second NF is sent by the third NF, the notification of the establishment of the user's PDU session is sent by the second NF to the third NF. Three NF subscriptions.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

According to the information/identification of the user, the first NF queries the session binding support function BSF with the information/identification/address of the second NF, and determines the second NF;

The first NF notifies the second NF of a service flow start and end.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

According to the information/identification of the user, the first NF queries the storage function NRF with the information/identification/address of the second NF, and determines the second NF;

The first NF notifies the second NF of a service flow start and end.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

The first NF determines the second NF according to the subscription request of the second NF;

The first NF notifies the second NF of a service flow start and end.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

The first NF determines a second NF according to the second subscription request;

The first NF notifies the second NF of a service flow start and end.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The first NF subscribes policy information to the UDR for all users of the preset application;

Detect the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The service flow state of the PDU session is that the second NF subscribes to the first NF in batches according to the policy information, and the first NF detects the service flow of the session of the application associated with the designated DNN and the slice identifier according to the policy information;

Wherein, the policy information is the policy information that the second NF subscribes to the UDR for all users of the preset application.

Optionally, both the first NF and the second NF are policy control functions PCF, the first NF is related to session management, and the second NF is related to access management.

Embodiments of the present invention also provide a method for status subscription notification, including:

The second NF receives the notification of the start and end of the service flow sent by the first NF; the first NF triggers the detection of the service flow according to the policy information.

Optionally, the method also includes:

The second NF subscribes policy information to the UDR;

After receiving the policy information notified by the UDR, write the relevant information of the second NF into the UDR;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the method also includes:

A subscription request is sent to the first NF, where the subscription request is used for establishing a PDU session of the subscribing user.

Optionally, the method also includes:

After confirming that the PDU session of the user is established, the second NF sends a second subscription request to the first NF, where the second subscription request is used for subscribing to a service flow state.

Optionally, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the identification or address of the first NF or session binding information, confirm the establishment of the user's PDU session .

Optionally, the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or sent by the third NF.

Optionally, the second NF receives relevant information of the first NF and sends it for the first NF or the third NF;

Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF.

Optionally, the method also includes:

The second NF sends a first subscription request to the first NF, and the first subscription request is used to establish a PDU session of the subscribing user; or, the second NF sends a first indication to the first NF, and the first indication is used to request Or indicate: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established;

The second NF receives the notification of the establishment of the user's PDU session sent by the first NF;

The second NF sends a second subscription request to the first NF after receiving the user's PDU session establishment notification.

Optionally, the first subscription request or the first indication carries a DNN and/or a slice identifier.

Optionally, the first subscription request carries related information of the second NF;

or

The first indication carries related information of the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, when the notification of establishment of the user's PDU session received by the second NF is sent by the third NF, the method further includes:

The second NF sends a third subscription request to the third NF, and the third subscription request is used to establish a PDU session of the subscribing user;

The second NF receives the notification of establishment of the user's PDU session sent by the third NF.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The second NF subscribes policy information to the UDR for all users of the preset application;

The second NF subscribes to the first NF in batches for the service flow status of the PDU session according to the policy information.

An embodiment of the present invention also provides an apparatus for status subscription notification, which is applied to the first network function NF, including:

A processing module, configured to trigger detection of service flows according to policy information;

The transceiver module is configured to notify the second NF of the start and end of the service flow.

An embodiment of the present invention also provides a network function NF, including the above-mentioned apparatus.

An embodiment of the present invention also provides an apparatus for status subscription notification, which is applied to the second network function NF, including:

The transceiver module is configured to receive the notification of the start and end of the service flow sent by the first NF; the first NF triggers the detection of the service flow according to the policy information.

An embodiment of the present invention also provides a network function NF, including the device as described above.

An embodiment of the present invention also provides a communication device, including: a processor, and a memory storing a computer program, and when the computer program is run by the processor, the above-mentioned method is executed.

An embodiment of the present invention also provides a computer-readable storage medium storing instructions, and when the instructions are run on a computer, the computer is made to execute the above-mentioned method.

Above-mentioned scheme of the present invention comprises following beneficial effect at least:

The first NF is triggered to detect the service flow according to policy information, and the first NF is related to session management; the first NF notifies the second NF of the start and end of the service flow; the second NF is related to access management relevant. The network function NF related to session management is used to trigger the detection of the service flow according to the policy information, avoiding the process of the network function NF related to access management accessing the session binding function BSF and the related network function NF, and reducing signaling overhead.

Description of drawings

FIG. 1 is a schematic flow diagram of a method for subscribing to an application data status according to an embodiment of the present invention;

FIG. 2 is a schematic flow diagram of a method for implementing application data status subscription based on a session management SM PCF according to an embodiment of the present invention;

FIG. 3 is another schematic flowchart of a method for implementing application data status subscription based on a session management SM PCF according to an embodiment of the present invention;

Fig. 4 is the flow chart of AM PCF subscribing once in the embodiment of the present invention;

5 is another schematic flow diagram of a method for implementing application data status subscription based on a session management SM PCF according to an embodiment of the present invention;

Fig. 6 is the flow chart of the AM PCF subscription 2 times of the embodiment of the present invention;

FIG. 7 is a schematic flow diagram of the second NF item and the first NF sending the first indication according to the embodiment of the present invention;

FIG. 8 is a schematic flow diagram of an AMF sending a notification of establishment of a user's PDU session to a second NF according to an embodiment of the present invention;

Fig. 9 is the schematic diagram that the SM PCF of the embodiment of the present invention removes the UDR batch subscription;

Fig. 10 is a schematic flow diagram of AM PCF subscribing to SM PCF twice in the embodiment of the present invention, and the first time is a batch subscription;

Fig. 11 is a block diagram of a device for subscribing to application data status according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

As shown in Figure 1, an embodiment of the present invention provides a method for subscribing to an application data state, including:

Step 11, the first NF (network function) triggers the detection of the service flow according to the policy information, and the first NF is related to session management, and the first NF may be a policy control function PCF;

Step 12, the first NF notifies the second NF of the start and end of the service flow; the second NF is related to access management, and the second NF may be a policy control function PCF.

In this embodiment, the first policy control function PCF triggers the detection of the service flow according to the policy information, and the first PCF is related to session management; the first PCF notifies the second PCF of the start and end of the service flow; the second PCF The second PCF is related to access management. Here, the policy information may be the user's policy information, and the user's policy information includes: access management policy influence information or access management influence information (AM influence information); the session management PCFF is used to trigger the detection of the service flow according to the policy information, to avoid The process of accessing the session binding function BSF and the session management PCF by the access management PCF is simplified, and signaling overhead is reduced.

In an embodiment of the present invention, before the first NF notifies the second NF of the start and end of the service flow, the first NF determines the second NF, and the first NF notifies the determined second NF of the start and end of the service flow; The determination of the second NF by the first NF may be before triggering the detection of the service flow, or when the detection of the service flow is triggered, or after the detection of the service flow is triggered.

In an optional embodiment of the present invention, taking NF as an example of PCF, step 11 may include:

Step 111 , the first PCF subscribes to the unified data warehouse function UDR for policy information, and detects the service flow of the user's protocol data unit PDU session after receiving the policy information notified by the UDR.

Wherein, after the user's protocol data unit PDU session is established, the first PCF subscribes to the policy information from the UDR, and after receiving the policy information notified by the UDR, detects the service flow of the user's PDU session. It should be noted that, in this embodiment, the establishment of the user's PDU session can also be replaced by the establishment of a session management policy association (Session Management Policy Association established), that is, after the first PCF establishes the session management policy association, Detect the service flow of the user's protocol data unit PDU session.

Specifically, subscribe policy information to UDR, including:

The policy information is created by the access function AF after the UDR, and the first PCF generates subscription information for subscribing to the policy information after receiving the notification of the UDR. Here, the subscription information subscribes to the beginning/end of a service flow (Application traffic) of the user's PDU session on the user plane and/or the address of the second PCF.

In an optional embodiment of the present invention, after the first PCF establishes the protocol data unit PDU session of the user, the first PCF subscribes to the policy information from the UDR, and after receiving the policy information notified by the UDR, the service of the user's PDU session Flow is checked.

In an optional embodiment of the present invention, taking NF as an example of PCF, step 12 may include:

Step 121, the first PCF queries the session binding support function BSF with the information/identity/address of the second PCF according to the information/identification of the user, and determines the second PCF; the first PCF notifies the second PCF of the service flow start and end. It should be noted that the second PCF determined in step 121 is the second PCF for which the first PCF needs to notify the start and end states of the service flow.

In an optional embodiment of the present invention, step 12 may also include:

Step 122, the first PCF queries the storage function NRF of the second PCF information/identity/address according to the user information/identification, and determines the second PCF; the first PCF notifies the second PCF of the start and end of the service flow . It should be noted that the second PCF determined in step 122 is the second PCF that the first PCF needs to notify of the start and end states of the service flow.

The specific implementation process is shown in Figure 2, including:

1. The PCF (SM PCF, the first PCF) related to session management goes to UDR to subscribe to this policy information after a user's session is established (this policy information is created/modified/deleted by AF, and this policy information is access management AM policy Affect request information).

2. Policy information After the UDR is created by the AF, the PCF of the session management will receive the notification of the UDR (a user's AM policy impact request information is created).

3. After receiving the notification, the SM PCF generates a subscription message according to the notification. Subscription information is related to the start/stop of the Application traffic (service flow) on the user plane for this PDU session subscribed to this user. The subscription information also has the address of the notifying party, that is, the address of the AM PCF that performs access management for the user.

4. The address of the notifier of subscription information can be obtained by querying BSF or NRF through SM PCF. AM PCF will register a default notification address during service registration.

5. The PCF starts the detection of the service flow, or indicates the detection to the SMF, or subscribes to the start/stop state of the service flow.

6. When an event related to the subscription information is detected (the application data start/stop status of the user's PDU session on the user plane), the SM PCF notifies the AM PCF according to the notifier address of the subscription information.

Another specific implementation process is shown in Figure 3, including:

1. The PCF (SM PCF, the first PCF) related to session management goes to UDR to subscribe to this policy information after a user's session is established (this policy information is created/modified/deleted by AF, and this policy information is access management AM policy Affect request information).

2. Policy information After the UDR is created by the AF, the PCF of the session management will receive the notification of the UDR (a user's AM policy impact request information is created).

3. After receiving the notification, the PCF starts the detection of the service flow, or indicates the detection to the SMF, or subscribes to the start/stop state of the service flow.

4. After detecting an event related to the subscription information (the application data start/stop state of the user's PDU session in the user plane), the SM PCF determines the AM PCF and then notifies the AM PCF. The SM PCF may determine the AM PCF by querying the session binding support function BSF having the information/identity/address of the second PCF or querying the NRF.

In an optional embodiment of the present invention, taking the NF as an example of PCF, the above step 11 may include:

Step 112, the first PCF receives a subscription request sent by the second PCF, and the subscription request is used for establishing a PDU session of a subscribing user (or establishing a session management policy association (SM policy association));

Step 113, the first PCF obtains policy information according to the subscription request, and detects the service flow of the user's protocol data unit PDU session according to the policy information.

The policy information here includes: DNN and slice information related to the PDU session.

Correspondingly, the above step 12 may include:

The first PCF determines the second PCF according to the subscription request of the second PCF; the first PCF notifies the second PCF of the start and end of the service flow.

The specific process is shown in Figure 4. 1. The PCF (SM PCF, i.e. the first PCF) related to session management goes to UDR to subscribe to this policy information after a user's session is established (this policy information is created/modified/deleted by AF, This policy information is Access Management AM Policy Impact Request Information).

2. Policy information After the UDR is created by the AF, the PCF of the session management will receive the notification of the UDR (a user's AM policy impact request information is created).

3. The first PCF receives the subscription request sent by the second PCF.

4. The first PCF obtains policy information according to the subscription request, and detects the service flow of the user's protocol data unit PDU session according to the policy information.

As an optional embodiment, the step 11 includes:

The first NF receives the second subscription request sent by the second NF, and the second subscription request is used for subscribing to the status of the service flow; when the first NF receives the second subscription request, it triggers the detection of the service flow; Wherein, the second subscription request is sent after the second NF confirms that the user's PDU session is established.

In this embodiment, when the second NF confirms that the user's PDU session is established, it sends a second subscription request to the first NF for subscribing to the service flow status to the first NF; the first NF receives the second subscription request , to trigger the detection of the service flow. Wherein, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the relevant information of the first NF, it confirms the establishment of the user's PDU session; the correlation of the first NF The information includes: at least one of the identifier, address and session binding information of the first NF.

It should be noted that, in this embodiment, the establishment of the user's PDU session can also be replaced by the establishment of the session management policy association, that is, the second NF sends the first NF to the first NF after confirming the establishment of the session management policy association. Two subscription requests. Wherein, when the second NF receives the notification of establishing the session management policy association, or the second NF receives relevant information of the first NF, confirming the establishment of the session management policy association.

It should be noted that the notification of establishment of the user's PDU session (or session management policy association establishment) received by the second NF may be sent by the first NF or by the third NF. The second NF receives the relevant information of the first NF, and may send it for the first NF or the third NF. The third NF may be other NFs except the first NF and the second NF. For example Access and Mobility Management Function AMF.

The specific implementation process is shown in Figure 5, taking NF as an example of PCF, including:

1. The PCF (SM PCF, the first PCF) related to session management goes to UDR to subscribe to this policy information after a user's session is established (this policy information is created/modified/deleted by AF, and this policy information is access management AM policy Affect request information).

2. When a user's PDU session is established, the AM PCF (that is, the second PCF) receives the user's PDU session notification, and the session notification can be sent by the SM PCF or by the AMF.

3. After receiving the notification that the user's PDU session is established, the AM PCF (ie, the second PCF) subscribes to the SM PCF (the first PCF) for the status of the application traffic of the user's PDU session (ie, sends the second subscription request);

4. The SM PCF (the first PCF) detects the service flow (Application traffic detection).

5. The SM PCF sends a notification to the AM PCF (notifying the status of the application traffic of the user's PDU session detected).

It should be noted that, in this embodiment, the establishment of the user's PDU session can also be replaced by the establishment of session management policy association, and the specific implementation process is similar to that in FIG. 5 , which will not be repeated here. The method for status subscription notification in the embodiment of the present invention will be described below by taking the first NF item and the second NF sending the user's PDU session establishment notification as an example.

In an optional embodiment of the present invention, taking NF as an example of PCF, the above step 11 may include:

Step 114, the first NF receives the first subscription request sent by the second NF, that is, the second PCF sends the first subscription request to the first PCF, and the first subscription request is used to establish a PDU session of the subscribing user; or, the first The NF receives the first indication sent by the second NF, where the first indication is used to request or indicate: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established;

Step 115, the first PCF notifies the second PCF when the user's PDU session is established, and the second PCF sends a second subscription request to the first PCF, and the second subscription request is used to subscribe to the service of the PDU session flow state, the first PCF detects the service flow of the user's PDU session according to the second subscription request.

In this embodiment, the second NF may send a first subscription request or a first indication to the first NF, and the first subscription request is used to subscribe to the first NF for establishing a PDU session; the first indication It is used to request or instruct the first NF to notify the second NF of the user's PDU session establishment after the PDU session is established.

Optionally, in this embodiment, the first subscription request may also be used to subscribe to the establishment of the session management policy association; the first indication may also be used to request or instruct the first NF to subscribe to the establishment of the session management policy association The second NF is notified. The first indication is an indication related to a PDU session or an indication related to session management policy association.

Optionally, the first subscription request or the first indication carries a DNN and/or a slice identifier. That is, when the second NF sends the first subscription request, it carries the DNN and/or the slice identifier, and is used for establishing a PDU session to subscribe to the user's specified DNN and/or slice identifier to the first NF. Alternatively, when the second NF sends the first indication, it carries a DNN and/or a slice identifier, and is used to indicate to the first NF or request the establishment of a PDU session of the user's specified DNN and/or slice identifier.

It should be noted that the PDU session information of the user will be obtained in the first NF when the PDU session is established or the session management policy association related to the PDU session is established.

Correspondingly, the above step 12 may include:

The first PCF determines the second PCF according to the second subscription request; the first PCF notifies the second PCF of the start and end of the service flow.

The specific implementation process is shown in Figure 6, taking NF as an example of PCF, including:

1. The AM PCF (that is, the second PCF) subscribes to the SM PCF (that is, the first PCF) for the PDU session information (for a group of users or all users corresponding to a DNN and a slice). The trigger condition for AM PCF to send a subscription request is to receive a notification sent by UDR, informing AF which users have created an application data for a DNN and a slice—the AM policy affects the request information; that is, the second NF subscribes users to the first NF PDU session establishment (can also be replaced by the establishment of subscription session management policy association).

2. When a user's PDU session is established (or a session management policy association is established), the SM PCF (ie, the first PCF) notifies the AM PCF (ie, the second PCF) of the user's PDU session information.

3. After receiving the notification, the AM PCF sends to the SM PCF a request for the start/stop state of the application data of a PDU session on the user plane.

4. SM PCF detection (Application traffic detection).

5. The SM PCF (that is, the first PCF) sends a notification to the AM PCF (that is, the second PCF) (notifying that the state of the application traffic of the user's PDU session is detected).

Optionally, the first subscription request carries related information of the second NF;

Or, the first indication carries related information of the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

In this embodiment, when the second NF sends the first subscription request or the first indication to the first NF, relevant information of the second NF may be carried in the first subscription request or the first indication, and the first The NF may obtain the address, identifier, binding information, etc. of the second NF according to the first subscription request; or, the first NF may obtain the address, identifier, binding information, etc. of the second NF while obtaining the first indication .

The specific implementation process is shown in Figure 7, taking the first NF receiving the first indication sent by the second NF, and the NF being PCF as an example, including:

0. The AM PCF (that is, the second PCF) carries an indication during the establishment or modification of the AM policy association, which is used to request or instruct the PCF for the PDU session (the first PCF) to send the PCF for the UE ( The second PCF) sends a notification.

1. During the establishment of the PDU session, the AMF->SMF and SMF->PCF messages carry the indication information (that is, the first indication) requesting the user's PDU session information, which is used to request or indicate PCF for the PDU session (the first PCF) sends a notification to the PCF for the UE (the second PCF) after the PDU session is established.

2. The first PCF sends a notification about the PDU session information to the second PCF.

3. After the second PCF confirms that the PDU session is established, it subscribes to the first PCF to subscribe to the status of the application traffic of the user's PDU session

4. SM PCF detection (Application traffic detection).

5. The SM PCF (that is, the first PCF) sends a notification to the AM PCF (that is, the second PCF) (notifying that the state of the application traffic of the user's PDU session is detected).

It should be noted that, in this embodiment, the user's PDU session establishment can also be replaced by session management policy association establishment, that is, the subscription user's PDU session establishment can be replaced by subscription session management policy association establishment; Sending notification after establishment can be replaced by sending notification after session management policy association is established; confirming PDU session establishment can be replaced by confirming session management policy association establishment. The specific implementation process is similar to that in FIG. 7 , and details are not repeated here. Optionally, the method also includes:

After the user's PDU session is established (or the session management policy association is established), the first NF subscribes to the policy information to the UDR;

After the user's PDU session is established (or session management policy association is established), the first NF notifies the second NF, including:

After receiving the policy information notified by the UDR, a notification message is sent to the second NF, where the notification message is used to notify the second NF of the user's PDU session establishment (or session management policy association establishment).

In this embodiment, after the first NF monitors that the user's PDU session is established (or session management policy association is established), it can subscribe to the policy information to the UDR. Since it receives the first subscription request sent by the second NF, it can receive After receiving the policy information of the UDR, the second NF is notified of the establishment of the PDU session of the user (or the establishment of session management policy association).

In this embodiment, the first NF may be a first PCF, and the second NF may be a second PCF. Taking the NF as the PCF as an example, the first PCF subscribes the policy information to the UDR, the first PCF subscribes to the policy information to the UDR after the PDU session is established, and after receiving the policy information notified by the UDR, sends the user’s PDU session to the second PCF The establishment notification message notifies the second PCF that the PDU session is established. After receiving the notification message, the second PCF sends a first request message to the first PCF, where the first request message is used to subscribe to the service flow status; the first PCF receives the first When a request message is received, the service flow is detected according to the first request message, and the state of the service flow is fed back to the second PCF, that is, the start and end of the service flow.

It should be noted that, the first NF may also send a request message to the UDR for requesting to obtain policy information, and the UDR feeds back policy information to the first NF according to the request message (for example: the first NF An NF queries the policy information from the second NF, and then can directly obtain the query result returned by the second NF); after the first NF receives the policy information, it sends a notification message of establishing the user's PDU session to the second NF; After receiving the notification message, the second NF sends a request message to the first NF for subscribing to the status of the service flow; the first NF detects the service flow according to the request message, and sends a request message to the second NF NF notifies the start and end of a service flow. In this embodiment, after the user's PDU session is established, the first NF sends a request message for requesting to obtain policy information to the UDR.

It should be noted that in this embodiment, the user's PDU session establishment can also be replaced by session management policy association establishment, for example: the subscription user's PDU session establishment can be replaced by subscription session management policy association establishment, confirming the PDU session establishment Can be replaced by confirm session management policy association establishment. The specific implementation process will not be repeated here.

Optionally, before the first NF sends the notification message to the second NF after receiving the policy information notified by the UDR, the method further includes: determining the second NF. In this embodiment, the determining the second NF is: determining the second NF that the first NF needs to notify the user of PDU session establishment (or session management policy association establishment). After determining the second NF, the first NF sends a notification message to the second NF.

Specifically, the determining the second NF may include but not limited to the following methods:

Mode 1: The first NF queries the session binding support function BSF with the relevant information of the second NF according to the user's information or identification, and determines the second NF; wherein, the relevant information of the second NF includes: information of the second NF , at least one item of the second NF identifier and the second NF address.

In the first method, the first NF may query the BSF according to the user information or the identifier, and the BSF has relevant information about the second NF, so as to determine the second NF, and the first NF sends the determined second NF to the BSF. Two NFs send notification messages for notifying PDU establishment (or session management policy association establishment).

Method 2: The first NF obtains the relevant information of the second NF from the UDR according to the user's information or identifier, and determines the second NF; wherein, the relevant information of the second NF includes: information of the second NF, information of the second NF, At least one item of the second NF identifier and the second NF address.

In the second method, the first NF can obtain the relevant information of the second NF through the UDR according to the user's information or identification, so as to determine the second NF, and the first NF sends a message to the determined second NF. Notification message for notifying PDU establishment (or session management policy association establishment).

Method 3: The relevant information of the second NF carried when receiving the UDR notification policy information, and determining the second NF; wherein, the relevant information of the second NF includes: information about the second NF, the identifier of the second NF, and the second NF. At least one of the two NF addresses.

In the third method, the first NF subscribes to the UDR for policy information, and can receive the policy information notified by the UDR and the relevant information of the second NF, that is, the UDR notifies the policy information with the relevant information of the second NF. information.

As an optional embodiment, after the first NF detects the service flow, the first NF may determine the second NF according to the subscription request of the second NF, and the subscription request of the second NF is a service flow A subscription request for a state (that is, the start and end of a service flow), the second NF for determining in this embodiment is the second NF for determining that the state of the service flow needs to be sent. After determining the second NF, the first NF notifies the second NF of the start and end of the service flow.

The above is an embodiment in which the first NF sends the notification of the user's PDU session establishment (or session management policy association establishment) to the second NF. The following describes the third NF sending the user's PDU session establishment (or session management policy association establishment) to the second NF through specific embodiments. session management policy association establishment).

Optionally, when the notification of the user's PDU session establishment received by the second NF is sent by the third NF, the notification of the user's PDU session establishment (or session management policy association establishment) is the The second NF subscribes to the third NF. The third NF may be other NFs except the first NF and the second NF, such as AMF.

Specifically, the implementation process is shown in Figure 8, taking the AMF sending the notification of the establishment of the user's PDU session to the second NF as an example, including:

1. The AM PCF (that is, the second PCF) subscribes to the AMF for the PDU session information (subscribing to the user's PDU session information).

2. When a user's PDU session is established, the AMF notifies the AM PCF (that is, the second PCF) of the user's PDU session information.

3. After receiving the notification, the AM PCF sends to the SM PCF a request for the start/stop state of the application data of a PDU session on the user plane (that is, the state of the application traffic of the PDU session of the subscribed user).

4. SM PCF detection (Application traffic detection).

5. The SM PCF (that is, the first PCF) sends a notification to the AM PCF (that is, the second PCF) (notifying that the state of the application traffic of the user's PDU session is detected).

It should be noted that, in this embodiment, the establishment of the user's PDU session can also be replaced by the establishment of the session management policy association, for example: the establishment of the subscription user's PDU session can be replaced by the establishment of the subscription session management policy association, and the confirmation of the PDU session Establishment may be replaced by confirming session management policy association establishment. The specific implementation process is similar to that in FIG. 8 , and details are not repeated here. In an optional embodiment of the present invention, the first PCF subscribes policy information to the UDR, including:

All policy information for the preset application is created in batches by AF in UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The first NF subscribes policy information to the UDR for all users of the preset application;

Detect the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information.

The policy information is created in batches by the AF in the UDR, and the first PCF batch subscribes to the session information of the predetermined DNN and slice, the start/end status of the service flow of all users or the subscription of the start/end status of the service flow.

The specific implementation process is shown in Figure 9, including:

AF creates application data in batches in UDR (all users/group of users for a specific DNN and a specific slice)

1. After the AM policy (access policy) control function is enabled, the AM PCF performs batch subscription of application data of all users of a specific DNN and a specific slice to the SM PCF.

2. The AM PCF receives the notification of the UDR and receives the application data of batch users (application policy impact request).

3. The AM PCF subscribes to the SM PCF in batches for the subscription of the user's PDU session information and application data start/stop status for a specific DNN and a specific slice (two-in-one event subscription) or application data start/stop status subscription (can be a capability open service).

4. When a user establishes a PDU session for a specified DNN and slice, and the SM PCF detects the start/stop status of the application data on the user plane, the SM PCF sends a notification to the AM PCF (for each session of a specific slice and a specific PDU session) users to send notifications per PDU session).

In the above embodiments of the present invention, the session management PCF is used to subscribe user policy information to the UDR, which avoids the process of the access management PCF accessing the BSF and the session management PCF, and reduces signaling overhead.

In an optional embodiment of the present invention, all policy information for a preset application is created in batches by AF in UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

Wherein, the policy information is the policy information that the second NF subscribes to the UDR for all users of the preset application, that is, the second NF subscribes the policy information to the UDR for all users of the preset application;

The service flow state of the PDU session is that the second NF subscribes to the first NF in batches according to the policy information, that is, the second NF subscribes to the first NF in batches to the service flow state of the PDU session according to the policy information, and the first NF The NF detects the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information.

As shown in FIG. 10 , the AM PCF (that is, the second PCF) subscribes twice to the SM PCF (that is, the first PCF), and the first time is a batch subscription. include:

1. Subscribe UE application data in batches for all users of slices and DNN;

2. The second PCF receives application data of a batch of users;

3. The second PCF subscribes to the application traffic status of the user's PDU session or the application traffic and PDU session information of the PDU session in batches according to the application data information of the batch user notified by the UDR;

4. After the PDU session establishment (PDU session Establishment), the SM PCF (that is, the first PCF) performs service flow detection (Application traffic detection);

The SM PCF (that is, the first PCF) independently sends a notification to the AM PCF (that is, the second PCF) regarding the application traffic status of the PDU session of a certain user.

It should be noted that, in this embodiment, the user's PDU session establishment can also be replaced by session management policy association establishment, for example: the subscription user's PDU session establishment can be replaced by subscription session management policy association, confirming that PDU session establishment Replaced with Confirm Session Management Policy Association Establishment. The specific implementation process is similar to that in FIG. 10 , and details are not repeated here.

Embodiments of the present invention also provide a method for status subscription notification, including:

The second network function NF receives the notification of the start and end of the service flow sent by the first NF; the second NF is related to access management; wherein, the first NF triggers the detection of the service flow according to the policy information, and the The first NF is related to session management. The NF here may be a policy control function PCF.

Optionally, the method further includes: the second NF subscribes the policy information to the UDR;

After receiving the policy information notified by the UDR, write the relevant information of the second NF into the UDR; where the relevant information of the second NF includes: the second NF information, the second NF identifier, and the second NF At least one of the addresses.

In this embodiment, the second NF subscribes to the UDR for policy information, and after receiving the policy information notified by the UDR, writes its own relevant information (that is, the relevant information of the second NF) into the UDR; wherein, the relevant information includes At least one of identification, address, information. When the second NF writes the relevant information into the UDR, the relevant information (at least one of identification, address, and information) of the second NF needs to be associated with the user's information/identification. The identifier/address/information of the second NF can be written into the policy information or application data of the UDR.

Optionally, the method also includes:

A subscription request is sent to the first NF, where the subscription request is used for establishing a PDU session of the subscribing user.

Optionally, the method also includes:

After confirming that the PDU session of the user is established, the second NF sends a second subscription request to the first NF, where the second subscription request is used for subscribing to a service flow state.

Optionally, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the identification or address of the first NF or session binding information, confirm the establishment of the user's PDU session .

Optionally, the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or sent by the third NF.

Optionally, the second NF receives relevant information of the first NF and sends it for the first NF or the third NF;

Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF.

Optionally, the method also includes:

The second NF sends a first subscription request to the first NF, and the first subscription request is used to establish a PDU session of the subscribing user; or, the second NF sends a first indication to the first NF, and the first indication is used to request Or indicate: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established;

The second NF receives the notification of the establishment of the user's PDU session sent by the first NF;

The second NF sends a second subscription request to the first NF after receiving the user's PDU session establishment notification.

Optionally, the first subscription request or the first indication carries a DNN and/or a slice identifier.

Optionally, the first subscription request carries related information of the second NF;

or

The first indication carries related information of the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, when the notification of establishment of the user's PDU session received by the second NF is sent by the third NF, the method further includes:

The second NF sends a third subscription request to the third NF, and the third subscription request is used to subscribe to the user's PDU session;

The second NF receives the notification of establishment of the user's PDU session sent by the third NF.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The second NF subscribes policy information to the UDR for all users of the preset application;

The second NF subscribes to the first NF in batches for the service flow status of the PDU session according to the policy information.

It should be noted that, in the embodiment of the present invention, the user's PDU session establishment can also be replaced by session management policy association establishment, for example: the subscription user's PDU session establishment can be replaced by subscription session management policy association, confirming the PDU session Establishment may be replaced by confirming session management policy association establishment. The specific implementation process will not be repeated here.

It should be noted that all the methods in the above-mentioned Fig. 1 to Fig. 10 are applicable to the embodiment of the method, and the same technical effect can also be achieved.

As shown in FIG. 11 , an embodiment of the present invention also provides an apparatus 110 for status subscription notification, which is applied to the first network function NF, including:

A processing module 111, configured to trigger detection of service flows according to policy information;

The transceiver module 112 is configured to notify the second NF of the start and end of the service flow; the second NF is related to access management.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF subscribes policy information to the unified data warehouse function UDR, and after receiving the policy information notified by the UDR, detects the service flow of the user's protocol data unit PDU session.

Optionally, after the user's protocol data unit PDU session is established, the first NF subscribes to the policy information from the UDR, and detects the service flow of the user's PDU session after receiving the policy information notified by the UDR.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF receives the subscription request sent by the second NF, and the subscription request is used for establishing a PDU session of the subscribing user;

The first NF obtains policy information according to the subscription request, and detects the service flow of the user's protocol data unit PDU session according to the policy information.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF receives a second subscription request sent by the second NF, and the second subscription request is used for subscribing to a service flow state;

In the case of receiving the second subscription request, the first NF triggers detection of the service flow;

Wherein, the second subscription request is sent after the second NF confirms that the user's PDU session is established.

Optionally, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the relevant information of the first NF, confirming the establishment of the user's PDU session;

Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF.

Optionally, the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or sent by the third NF.

Optionally, the second NF receives relevant information of the first NF and sends it for the first NF or the third NF.

Optionally, the first NF triggers detection of service flows according to policy information, including:

The first NF receives the first subscription request sent by the second NF, and the first subscription request is used for establishing a PDU session of the subscribing user;

Or, the first NF receives the first indication sent by the second NF, and the first indication is used for requesting or indicating: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established;

The first NF notifies the second NF when the user's PDU session is established, and the second NF sends a second subscription request to the first NF, the second subscription request is used to subscribe to the service flow status of the PDU session, The first NF detects the service flow of the user's PDU session according to the second subscription request.

Optionally, the first subscription request or the first indication carries a DNN and/or a slice identifier.

Optionally, the first subscription request carries related information of the second NF;

or

The first indication carries related information of the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the method also includes:

After the user's PDU session is established, the first NF subscribes the policy information to the UDR;

After the user's PDU session is established, the first NF notifies the second NF, including:

After receiving the policy information notified by the UDR, send a notification message to the second NF, where the notification message is used to notify the second NF of the establishment of the PDU session of the user.

Optionally, after receiving the policy information notified by the UDR, before sending the notification message to the second NF, the method further includes:

Determine the second NF.

Optionally, the determining the second NF includes:

The first NF queries the binding support function BSF with the relevant information of the second NF according to the user's information or identification, and determines the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the determining the second NF includes:

The first NF obtains the relevant information of the second NF from the UDR according to the user's information or identifier, and determines the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the determining the second NF includes:

receiving the relevant information of the second NF carried when the UDR notifies the policy information, and determining the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, in the case where the notification of the establishment of the user's PDU session received by the second NF is sent by the third NF, the notification of the establishment of the user's PDU session is sent by the second NF to the third NF. Three NF subscriptions.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

According to the information/identification of the user, the first NF queries the session binding support function BSF that stores the information/identification/address of the second NF, and determines the second NF;

The first NF notifies the second NF of a service flow start and end.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

According to the information/identification of the user, the first NF queries the storage function NRF storing the information/identification/address of the second NF, and determines the second NF;

The first NF notifies the second NF of a service flow start and end.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

The first NF determines the second NF according to the subscription request of the second NF;

The first NF notifies the second NF of a service flow start and end.

Optionally, the first NF notifies the second NF of the start and end of the service flow, including:

The first NF determines a second NF according to the second subscription request;

The first NF notifies the second NF of a service flow start and end.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The first NF subscribes policy information to the UDR for all users of the preset application;

Detect the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The service flow state of the PDU session is that the second NF subscribes to the first NF in batches according to the policy information, and the first NF detects the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information;

Wherein, the policy information is the policy information that the second NF subscribes to the UDR for all users of the preset application.

Optionally, both the first NF and the second NF are policy control functions PCF, the first NF is related to session management, and the second NF is related to access management.

It should be noted that the device is a device corresponding to the above-mentioned method, and all implementation modes of the above-mentioned method are applicable to the embodiments of the device, and can also achieve the same technical effect.

An embodiment of the present invention also provides a network function NF, including the above-mentioned apparatus.

An embodiment of the present invention also provides an apparatus for status subscription notification, which is applied to the second network function NF, including:

The transceiver module is configured to receive the notification of the start and end of the service flow sent by the first NF; the second NF is related to access management; wherein, the first NF triggers the detection of the service flow according to the policy information, and the The first NF is related to session management.

Optionally, the device also includes:

The subscription module is used for the second NF to subscribe policy information to the UDR;

An information writing module, configured to write the relevant information of the second NF into the UDR after receiving the policy information notified by the UDR;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, the device also includes:

The first sending module is configured to send a subscription request to the first NF, where the subscription request is used for establishing a PDU session of a subscribing user.

Optionally, the device also includes:

The second sending module is configured to send a second subscription request to the first NF after confirming that the user's PDU session is established, and the second subscription request is used for subscribing to a service flow state.

Optionally, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the identification or address of the first NF or session binding information, confirm the establishment of the user's PDU session .

Optionally, the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or sent by the third NF.

Optionally, the second NF receives relevant information of the first NF and sends it for the first NF or the third NF;

Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF.

Optionally, the device also includes:

The third sending module is configured to send a first subscription request to the first NF, and the first subscription request is used to establish a PDU session of the subscribing user; or, the second NF sends a first indication to the first NF, and the first The indication is used to request or indicate: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established;

The first receiving module is configured to receive the notification of establishment of the user's PDU session sent by the first NF;

The fourth sending module is configured to send a second subscription request to the first NF after receiving the user's PDU session establishment notification.

Optionally, the first subscription request or the first indication carries a DNN and/or a slice identifier.

Optionally, the first subscription request carries related information of the second NF;

or

The first indication carries related information of the second NF;

Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address.

Optionally, when the notification of establishment of the user's PDU session received by the second NF is sent by the third NF, the device further includes:

A fifth sending module, configured to send a third subscription request to the third NF, where the third subscription request is used to subscribe to the user's PDU session;

The second receiving module is configured to receive the notification of establishment of the user's PDU session sent by the third NF.

Optionally, all the policy information for the preset application is created in batches by the AF in the UDR as application data, and the preset application is associated with a specified DNN and a slice identifier;

The second NF subscribes policy information to the UDR for all users of the preset application;

The second NF subscribes to the first NF in batches for the service flow status of the PDU session according to the policy information.

It should be noted that the device is a device corresponding to the above-mentioned method, and all implementation modes of the above-mentioned method are applicable to the embodiments of the device, and can also achieve the same technical effect.

It should be noted that, in the embodiment of the present invention, when the PDU session of the subscribing user is established, the release and modification of the PDU session can also be subscribed to. While instructing the user to send a notification after the PDU session is established, it may also instruct the user to send a notification after the PDU session is released and modified.

When the SM policy association of the subscribing user is established, the release and modification of the SM policy association can also be subscribed. When instructing the SM policy to send a notification after the association is established, it can also instruct the SM policy to send a notification after the association is released and modified.

In the above embodiments of the present invention, both the user's AM PCF (network function NF related to access management) and SM PCF (network function NF related to session management) can access the UDR. The information subscribed by AM PCF to SM PCF comes from the AM policy influence request information subscribed by AMPCF to UDR (belonging to the application data stored in UDR, created/modified by AF to UDR). SM PCF can also go to UDR to subscribe to AM policy influence request information. After receiving the UDR notification, an implicit subscription of AM PCF->SM PCF is generated. The SM PCF sends a PDU session establishment notification to the AM PCF, and then the AM PCF subscribes to the SM PCF for service flow status. After detecting the state of the application data flow, the SM PCF sends a notification to the AM PCF. The notification address of the AM PCF can be a default notification address, which is registered by the AM PCF to the NRF, and the SM PCF obtains it by going to the NRF to find out; or the SM PCF can go to the UDR to subscribe (subscribe to AM PCF subscription events.). In addition, the user's AM PCF (network function NF related to access management) and SM PCF (network function NF related to session management) can directly exchange PCF binding information or subscribe to PDU session establishment or instruct SM PCF in PDU Send a notification when a session is established.

Implicit subscription is generated after the SM PCF removes the UDR subscription policy data, or the interaction between the AM PCF and the SM PCF avoids the process of the access management PCF accessing the BSF and the session management PCF, reducing signaling overhead.

An embodiment of the present invention also provides a communication device, including: a processor, and a memory storing a computer program, and when the computer program is run by the processor, the above-mentioned method is executed. All the implementation manners in the foregoing method embodiments are applicable to this embodiment, and can also achieve the same technical effect.

An embodiment of the present invention also provides a computer-readable storage medium, including instructions, which, when run on a computer, cause the computer to execute the method described above. All the implementation manners in the foregoing method embodiments are applicable to this embodiment, and can also achieve the same technical effect.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

In addition, it should be pointed out that in the device and method of the present invention, obviously, each component or each step can be decomposed and/or reassembled. These decompositions and/or recombinations should be considered equivalents of the present invention. Also, the steps for executing the above series of processes can naturally be executed in chronological order according to the illustrated order, but they are not necessarily executed in chronological order, and some steps can be executed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the method and device of the present invention can be implemented in any computing device (including a processor, storage medium, etc.) or a network of computing devices in the form of hardware or firmware , software or a combination thereof, which can be realized by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

Therefore, the object of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device may be a known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product including program codes for realizing the method or device. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium may be any known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, obviously, each component or each step can be decomposed and/or reassembled. These decompositions and/or recombinations should be considered equivalents of the present invention. Also, the steps for performing the above series of processes may naturally be performed in chronological order in the order described, but need not necessarily be performed in chronological order. Certain steps may be performed in parallel or independently of each other.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (42)

1. A method for status subscription notification, comprising: The first network function NF triggers the detection of the service flow according to the policy information; The first NF notifies the second NF of the start and end of the service flow. 2. The method for status subscription notification according to claim 1, wherein the first NF triggers detection of service flow according to policy information, including: The first NF subscribes policy information to the unified data warehouse function UDR, and after receiving the policy information notified by the UDR, detects the service flow of the user's protocol data unit PDU session. 3. The method for status subscription notification according to claim 2, characterized in that, After the user's protocol data unit PDU session is established, the first NF subscribes to the UDR for policy information, and after receiving the policy information notified by the UDR, detects the service flow of the user's PDU session. 4. The method for status subscription notification according to claim 1, wherein the first NF triggers the detection of service flows according to policy information, including: The first NF receives the subscription request sent by the second NF, and the subscription request is used for establishing a PDU session of the subscribing user; The first NF obtains policy information according to the subscription request, and detects the service flow of the user's protocol data unit PDU session according to the policy information. 5. The method for status subscription notification according to claim 1, wherein the first NF triggers the detection of service flows according to policy information, comprising: The first NF receives a second subscription request sent by the second NF, and the second subscription request is used for subscribing to a service flow state; In the case of receiving the second subscription request, the first NF triggers detection of the service flow; Wherein, the second subscription request is sent after the second NF confirms that the user's PDU session is established. 6. The method for status subscription notification according to claim 5, characterized in that, when the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the relevant information of the first NF In the case, confirm that the user's PDU session is established; Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF. 7. The method for status subscription notification according to claim 6, characterized in that, the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or by a third NF. 8. The method for status subscription notification according to claim 6, wherein the second NF receives the relevant information of the first NF and sends it for the first NF or the third NF. 9. The method for status subscription notification according to claim 1 or 7, wherein the first NF triggers detection of service flows according to policy information, including: The first NF receives the first subscription request sent by the second NF, and the first subscription request is used for establishing a PDU session of the subscribing user; Or, the first NF receives the first indication sent by the second NF, and the first indication is used for requesting or indicating: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established; After the user's PDU session is established, the first NF notifies the second NF, and the second NF sends a second subscription request to the first NF, and the second subscription request is used to subscribe to the service flow status of the PDU session, The first NF detects the service flow of the user's PDU session according to the second subscription request. 10. The method for status subscription notification according to claim 9, wherein the first subscription request or the first indication carries a DNN and/or a slice identifier. 11. The method for status subscription notification according to claim 9, characterized in that, The first subscription request carries relevant information of the second NF; or The first indication carries related information of the second NF; Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address. 12. The method for status subscription notification according to claim 9, wherein the method further comprises: After the user's PDU session is established, the first NF subscribes the policy information to the UDR; After the user's PDU session is established, the first NF notifies the second NF, including: After receiving the policy information notified by the UDR, send a notification message to the second NF, where the notification message is used to notify the second NF of the establishment of the PDU session of the user. 13. The method for status subscription notification according to claim 12, characterized in that, after receiving the policy information of the UDR notification, before sending a notification message to the second NF, the method further comprises: Determine the second NF. 14. The method for status subscription notification according to claim 13, wherein said determining the second NF comprises: The first NF queries the binding support function BSF with the relevant information of the second NF according to the user's information or identification, and determines the second NF; Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address. 15. The method for status subscription notification according to claim 13, wherein said determining the second NF comprises: The first NF obtains the relevant information of the second NF from the UDR according to the user's information or identifier, and determines the second NF; Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address. 16. The method for status subscription notification according to claim 13, wherein said determining the second NF comprises: receiving the relevant information of the second NF carried when the UDR notifies the policy information, and determining the second NF; Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address. 17. The method for state subscription notification according to claim 7, characterized in that, when the notification of the user's PDU session establishment received by the second NF is sent by the third NF, the user's The notification of PDU session establishment is that the second NF subscribes to the third NF. 18. The method for status subscription notification according to claim 2, wherein the first NF notifies the second NF of the start and end of the service flow, comprising: According to the information/identification of the user, the first NF queries the session binding support function BSF with the information/identification/address of the second NF, and determines the second NF; The first NF notifies the second NF of a service flow start and end. 19. The method for status subscription notification according to claim 2, wherein the first NF notifies the second NF of the start and end of the service flow, comprising: According to the information/identification of the user, the first NF queries the storage function NRF with the information/identification/address of the second NF, and determines the second NF; The first NF notifies the second NF of a service flow start and end. 20. The method for status subscription notification according to claim 4, wherein the first NF notifies the second NF of the start and end of the service flow, comprising: The first NF determines the second NF according to the subscription request of the second NF; The first NF notifies the second NF of a service flow start and end. 21. The method for status subscription notification according to claim 9, wherein the first NF notifies the second NF of the start and end of the service flow, comprising: The first NF determines a second NF according to the second subscription request; The first NF notifies the second NF of a service flow start and end. 22. The method for status subscription notification according to claim 1, characterized in that, All policy information for the preset application is created in batches by AF in UDR as application data, and the preset application is associated with a specified DNN and a slice identifier; The first NF subscribes policy information to the UDR for all users of the preset application; Detect the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information. 23. The method for status subscription notification according to claim 1, wherein: All policy information for the preset application is created in batches by AF in UDR as application data, and the preset application is associated with a specified DNN and a slice identifier; The service flow state of the PDU session is that the second NF subscribes to the first NF in batches according to the policy information, and the first NF detects the service flow of the session of the application associated with the specified DNN and the slice identifier according to the policy information; Wherein, the policy information is the policy information that the second NF subscribes to the UDR for all users of the preset application. 24. The method for status subscription notification according to any one of claims 1 to 23, wherein the first NF and the second NF are policy control functions (PCFs), and the first NF is related to session management, The second NF is related to access management. 25. A method for status subscription notification, comprising: The second NF receives the notification of the start and end of the service flow sent by the first NF; Wherein, the first NF triggers the detection of the service flow according to the policy information. 26. The method for status subscription notification according to claim 25, wherein the method further comprises: The second NF subscribes policy information to the UDR; After receiving the policy information notified by the UDR, write the relevant information of the second NF into the UDR; Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address. 27. The method for status subscription notification according to claim 25, further comprising: A subscription request is sent to the first NF, where the subscription request is used for establishing a PDU session of the subscribing user. 28. The method for status subscription notification according to claim 25, further comprising: After confirming that the PDU session of the user is established, the second NF sends a second subscription request to the first NF, where the second subscription request is used for subscribing to a service flow state. 29. The method for status subscription notification according to claim 28, characterized in that, When the second NF receives the notification of the establishment of the user's PDU session, or the second NF receives the identifier or address of the first NF or the session binding information, confirm the establishment of the user's PDU session. 30. The method for status subscription notification according to claim 29, wherein the notification of establishment of the user's PDU session received by the second NF is sent by the first NF or by a third NF. 31. The method for status subscription notification according to claim 29, wherein the second NF receives the relevant information of the first NF and sends it for the first NF or the third NF; Wherein, the relevant information of the first NF includes: at least one item of the identifier, address and session binding information of the first NF. 32. The method for status subscription notification according to claim 25 or 30, wherein the method further comprises: The second NF sends a first subscription request to the first NF, and the first subscription request is used to establish a PDU session of the subscribing user; or, the second NF sends a first indication to the first NF, and the first indication is used to request Or indicate: the first NF notifies the second NF of the user's PDU session establishment after the PDU session is established; The second NF receives the notification of the establishment of the user's PDU session sent by the first NF; The second NF sends a second subscription request to the first NF after receiving the user's PDU session establishment notification. 33. The method for status subscription notification according to claim 32, wherein the first subscription request or the first indication carries a DNN and/or a slice identifier. 34. The method for status subscription notification according to claim 32, wherein the first subscription request carries relevant information of the second NF; or The first indication carries related information of the second NF; Wherein, the relevant information of the second NF includes: at least one item of second NF information, second NF identifier, and second NF address. 35. The method for status subscription notification according to claim 30, characterized in that, when the notification of the user's PDU session establishment received by the second NF is sent by the third NF, the method further includes include: The second NF sends a third subscription request to the third NF, and the third subscription request is used to establish a PDU session of the subscribing user; The second NF receives the notification of establishment of the user's PDU session sent by the third NF. 36. The method for status subscription notification according to claim 25, wherein: All policy information for the preset application is created in batches by AF in UDR as application data, and the preset application is associated with a specified DNN and a slice identifier; The second NF subscribes policy information to the UDR for all users of the preset application; The second NF subscribes to the first NF in batches for the service flow status of the PDU session according to the policy information. 37. A device for status subscription notification, characterized in that it is applied to the first network function NF, comprising: A processing module, configured to trigger detection of service flows according to policy information; The transceiver module is configured to notify the second NF of the start and end of the service flow. 38. A network function NF, comprising the device according to claim 37. 39. A device for status subscription notification, characterized in that it is applied to the second network function NF, comprising: A transceiver module, configured to receive the notification of the start and end of the service flow sent by the first NF; Wherein, the first NF triggers the detection of the service flow according to the policy information. 40. A network function NF, comprising the device according to claim 39. 41. A communication device, characterized by comprising: a processor and a memory storing a computer program, and when the computer program is run by the processor, the method according to any one of claims 1 to 36 is executed. 42. A computer-readable storage medium, characterized by storing instructions, and when the instructions are run on a computer, the computer is made to execute the method according to any one of claims 1 to 36.

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