Network data collection method from application function device for network data analytic function

1. A network data collecting method performed by a network exposure function (NEF) device, comprising:

transmitting a Nnrf_NFManagement_NFUpdate_request message for update registration information into a network repository function (NRF) device;

receiving a Nnrf_NFManagement_NFUpdate_response message from the NRF device;

receiving a Nnef_EventExposure_Subscribe message from a network data analytic function (NWDAF) device;

transmitting a Naf_EventExposure_Subscribe message into an application function (AF) device;

receiving a Naf_EventExposure_Notify message from the AF device;

transmitting a Nnef_EventExposure_Notify message into the NWDAF device,

wherein the Naf_EventExposure_Subscribe message comprise:

(i) an input including a Target of Event Reporting, external UE ID, External Group Identifier, indication that any UE is targeted, an Event ID, a Notification Target Address with Notification Correlation ID), Event Reporting Information and an Expiry time,

(ii) an output including an Operation execution result indication, and a Subscription Correlation ID, when the subscription is accepted.

2. The method of claim 1 , wherein the NRF device stores NEF registration information including available data to be collected from the AF device.

3. The method of claim 1 , wherein the Nnef_EventExposure_Subscribe message comprise:

(i) an input including an Event ID, a Target of Event Reporting, a GPSI, a External Group Identifier, Event Reporting Information, or a Notification Target Address with Notification Correlation ID, and

(ii) an output including a Subscription Correlation ID, or Expiry time.

4. The method of claim 1 , further comprising:

transmitting a Naf_EventExposure_Unsubscribe message into the AF device,

wherein the Naf_EventExposure_Unsubscribe comprises:

(i) an input including a Subscription Correlation ID, and

(ii) an output including an Operation execution result indication.

5. The method of claim 1 , wherein the Naf_EventExposure_Notify message comprises:

(i) an input including Notification Correlation Information, an Event ID, corresponding UE external UE ID, an External Group Identifier, an indication of any UE or time stamp.

6. The method of claim 1 , wherein the Nnef_EventExposure_Notify message comprises:

(i) an input including an Event ID, Notification Correlation Information or time stamp, and

(ii) an output including an Operation execution result indication.

7. The method of claim 1 , wherein the AF device invokes the Naf_EventExposure_Notify message into the NEF device, when the NEF device subscribes to data in the AF device.

8. The method of claim 1 , wherein the NEF device invokes the Nnef_EventExposure_Notify message into the NWDAF device, when the NEF device receives a notification from the AF device.

9. The method of claim 1 , wherein the NWDAF device invokes the Nnrf_NFDiscovery_Request_request message, when the NWDAF needs to discovery an available data from the AF device and the appropriated NEF device to collect the available data.

10. A network data collecting method performed by a network data analytic function (NWDAF) device, comprising:

transmitting a Naf_EventExposure_Subscribe message for a subscription of an event into an application function (AF) device; and

receiving a Naf_EventExposure_Notify message from the AF device when the NWDAF subscribes the event,

wherein the Naf_EventExposure_Subscribe message comprises:

(i) an input including a Target of Event Reporting, an external UE ID, External Group Identifier, an indication that any UE is targeted, an Event ID, a Notification Target Address with Notification Correlation ID), an Event Reporting Information and Expiry time,

(ii) an output including a Operation execution result indication, and a Subscription Correlation ID, when the subscription is accepted.

11. The method of claim 10 , wherein the Naf_EventExposure_Notify message comprises:

(i) an input including Notification Correlation Information, an Event ID, corresponding UE external UE ID, an External Group Identifier, an indication of any UE or time stamp.

12. The method of claim 10 , further comprising:

transmitting a Naf_EventExposure_Unsubscribe message into the AF device,

wherein the Naf_EventExposure_Unsubscribe comprises:

(i) an input including a Subscription Correlation ID, and

(ii) an output including an Operation execution result indication.