WO2023056784A1 - Procédé de collecte de données, appareil de communication et système de communication - Google Patents

Procédé de collecte de données, appareil de communication et système de communication Download PDF

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Publication number
WO2023056784A1
WO2023056784A1 PCT/CN2022/113349 CN2022113349W WO2023056784A1 WO 2023056784 A1 WO2023056784 A1 WO 2023056784A1 CN 2022113349 W CN2022113349 W CN 2022113349W WO 2023056784 A1 WO2023056784 A1 WO 2023056784A1
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Prior art keywords
session
information
application
network
request message
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PCT/CN2022/113349
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English (en)
Chinese (zh)
Inventor
丁辉
李飞
周晓云
时书锋
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华为技术有限公司
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Publication of WO2023056784A1 publication Critical patent/WO2023056784A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • the present application relates to the technical field of wireless communication, in particular to a data collection method, a communication device and a communication system.
  • the data analysis network element can collect data from the application function network element when the terminal device accesses an application in the application function, and analyze the collected data to obtain analysis results, which can be used as an improvement References for user experience.
  • the present application provides a data collection method, a communication device, and a communication system to improve the security of data collection.
  • the embodiment of the present application provides a data collection method, which can be executed by a data analysis network element or a module (such as a chip) applied to the data analysis network element.
  • the method includes: determining the address information of the first session used by the terminal device to access the application; sending a first request message to the application function network element providing the application, the first request message including the identification information of the application and the first session the address information of the first session; the address information of the first session is used to collect the application data of the terminal device; and receive the application data from the application function network element.
  • the address information of the first session is used to collect the data of the application of the terminal device, for example, the application function network element collects the data of the application of the terminal device according to the address information of the first session. Wherein, the application function network element collects the data of the application of the terminal device. For example, the application function network element may send a request message to the terminal device to request the data of the application of the terminal device. The functional network element records the data in the process of the terminal device accessing the application through the first session.
  • the data analysis network element can determine the address information of the session used by the terminal device to access the application, so that it only needs to provide the address information of the session to the application function network element, and the terminal device may not access the session.
  • the address information of all sessions of the application is sent to the application function network element, which avoids exposing the session information of the terminal device that should not be sensed by the application function network element to the application function network element, and reduces security risks.
  • the network information corresponding to the application includes data network name and/or slice identification information
  • send a second request message to the communication device corresponding to the network information the second request message includes The identification information of the application and the application start event, the second request message also includes the network information or the identification information of the session corresponding to the network information; receiving the address information of the first session from the first communication device, the first session It is a session in which the application start event of the application is detected among the sessions corresponding to the network information, and the first communication device is one of the communication devices corresponding to the network information.
  • the communication device determines the address information of the first session used when the terminal device accesses the application by detecting the application start event in the session, and the communication device sends the address information of the first session to the data analysis network element, which can accurately determine the address information of the session used by the terminal device to access the application.
  • the second request message further includes session parameter information, and the session parameter information is used to determine one or more sessions in the session corresponding to the network information, and the one or more sessions are applications to be executed Start a session for event detection.
  • the data analysis network element provides session parameter information to the communication device, and the communication device can filter the sessions to be performed application start event detection according to the session parameter information, thus reducing the number of sessions for which the communication device performs application start event detection, and can Reduce communication equipment overhead.
  • the session parameter information of the network element, the session parameter information corresponds to the flow descriptor information and the identification information of the terminal device.
  • the routing descriptor used by the terminal device to access the application is obtained from the mobility management policy control network element, the routing descriptor includes network information and first session parameter information, and the network information includes data Network name and/or slice identification information; send a fourth request message to the communication device corresponding to the network information, the fourth request message includes the first session parameter information, and the fourth request also includes the network information or the network information corresponding The identification information of the session; receiving the address information of the first session from the first communication device, the first session is a session corresponding to the first session parameter information in the session corresponding to the network information, and the first communication device is one of the communication devices corresponding to the network information.
  • the data analysis network element slave management strategy controls the network element to obtain the routing descriptor used when the terminal device accesses the application.
  • the routing descriptor includes the first session parameter information, and the data analysis network element uses the first session parameter.
  • the information is provided to the communication device, so that the communication device can determine the first session corresponding to the first session parameter information from one or more sessions, and the first session is the session used when the terminal device accesses the application. Then the communication device sends the address information of the first session to the data analysis network element, so that the address information of the session used by the terminal device to access the application can be accurately determined.
  • the routing descriptor used by the terminal device to access the application is obtained from the mobility management policy control network element, the routing descriptor includes network information and first session parameter information, and the network information includes data Network name and/or slice identification information; sending a fifth request message to the communication device corresponding to the network information, where the fifth request message includes the identification information of the network information or the session corresponding to the network information; receiving the communication with the network information from the communication device The address information of the session corresponding to the network information, and the session parameter information of the session corresponding to the network information; according to the session parameter information of the session corresponding to the network information and the first session parameter information, from the address of the session corresponding to the network information The address information of the first session is determined in the information, and the session parameter information of the first session is the first session parameter information.
  • the data analysis network element slave management strategy controls the network element to obtain the routing descriptor used when the terminal device accesses the application.
  • the routing descriptor includes the first session parameter information, and the data analysis network element obtains a Address information and session parameter information of one or more sessions, and determine the first session corresponding to the first session parameter information from the one or more sessions, and the first session is the session used when the terminal device accesses the application , can accurately determine the address information of the session used when the terminal device accesses the application.
  • the address information of the communication device corresponding to the network information and the identification information of the session are obtained from the data management network element, and the communication device is a session management network element; or, from the binding support network element Obtain the address information of the communication device and the identification information of the session corresponding to the network information, where the communication device is a session management policy control network element.
  • the address information of the communication device corresponding to the network information is obtained from the binding support network element, and the communication device is a session management policy control network element.
  • the embodiment of the present application provides a data collection method, which can be executed by a communication device or a module (such as a chip) applied in the communication device, and the communication device is a session management policy control network element or a session management network Yuan.
  • the method includes: receiving a second request message from a data analysis network element, the second request message includes application identification information and an application start event, and the second request message also includes network information or identification information of a session corresponding to the network information ;
  • the application start event of the application is detected on the first session of the sessions corresponding to the network information; the address information of the first session is sent to the data analysis network element, and the address information of the first session is used to collect terminal equipment of the app's data.
  • the communication device determines the address information of the first session used when the terminal device accesses the application by detecting the application start event in the session, and the communication device sends the address information of the first session to the data analysis network element, which can accurately determine the address information of the session used by the terminal device to access the application.
  • the second request message also includes session parameter information; determine one or more sessions corresponding to the session parameter information in the session corresponding to the network information; execute the application on the one or more sessions Detection of a start event, the one or more sessions including the first session.
  • the embodiment of the present application provides a data collection method, which can be executed by a communication device or a module (such as a chip) applied in the communication device, and the communication device is a session management policy control network element or a session management network Yuan.
  • the method includes: receiving a fourth request message from a data analysis network element, where the fourth request message includes first session parameter information, and the fourth request message also includes network information or identification information of a session corresponding to the network information; Address information of a session, the first session is a session corresponding to the first session parameter information among the sessions corresponding to the network information; sending the address information of the first session to the data analysis network element, the first session The address information is used to collect data for this application of the terminal device.
  • the data analysis network element provides the first session parameter information to the communication device, so that the communication device can determine the first session corresponding to the first session parameter information from one or more sessions, and the first session is The session used by the terminal device to access the application. Then the communication device sends the address information of the first session to the data analysis network element, so that the address information of the session used by the terminal device to access the application can be accurately determined.
  • the session parameter information and/or the first session parameter information in any implementation method from the first aspect to the third aspect include one or more of the following information: session and business continuity mode, Access type or session type.
  • the embodiment of the present application provides a data collection method, which can be executed by an application function network element or a module (such as a chip) applied to the application function network element.
  • the method includes: receiving a data subscription request message from a data analysis network element, the data subscription request message including identification information of a terminal device and an external application ID (External Application ID); opening a function (network exposure function, NEF) network element to the network Sending a first request message, the first request message including the identification information of the terminal device and the external application identification, the first request message is used to query the address information of the session used by the terminal device to access the application corresponding to the external application identification; receiving The terminal device from the NEF network element accesses the address information of the first session used by the application corresponding to the external application identifier; according to the address information of the first session, collects the application data of the terminal device corresponding to the external application identifier ; Send the application data to the data analysis network element.
  • NEF network exposure function
  • the embodiment of the present application provides a data collection method, which can be executed by a network element with an open network function or a module (such as a chip) applied to the network element with an open network function.
  • the method includes: receiving a first request message from an application function network element, the first request message includes identification information of the terminal device and an external application identification, and the first request message is used to query the terminal equipment to access the corresponding external application identification The address information of the session used by the application; acquiring the address information of the first session used by the terminal device to access the application corresponding to the external application identifier; sending the address information of the first session to the application function network element.
  • acquiring the address information of the first session used by the terminal device to access the application corresponding to the external application identifier specifically includes: acquiring network information corresponding to the application, the network information including data network name and/or slice identification information; send a second request message to the communication device corresponding to the network information, the second request message includes the external application identifier and the application start event, and the second request message also includes the network information or the session corresponding to the network information identification information; receive address information of the first session from the first communication device, where the first session is a session in which the application start event of the application is detected in the session corresponding to the network information, and the first communication device is One of the communication devices corresponding to the network information.
  • the communication device determines the address information of the first session used when the terminal device accesses the application by detecting the application start event in the session, and receives the address information of the first session from the communication device, which can realize accurate determination Address information of the session used when the terminal device accesses the application.
  • the second request message further includes session parameter information, and the session parameter information is used to determine one or more sessions in the session corresponding to the network information, and the one or more sessions are applications to be executed Start a session for event detection.
  • the session parameter information is provided to the communication device, and the communication device can filter the sessions for which application start event detection is to be performed according to the session parameter information, thereby reducing the number of sessions for which the communication device performs application start event detection, and can reduce the communication device's overhead.
  • the session parameter information of the network element, the session parameter information corresponds to the flow descriptor information and the identification information of the terminal device.
  • the routing descriptor used by the terminal device to access the application is obtained from the mobility management policy control network element, the routing descriptor includes network information and first session parameter information, and the network information includes data Network name and/or slice identification information; send a fourth request message to the communication device corresponding to the network information, the fourth request message includes the first session parameter information, and the fourth request also includes the network information or the network information corresponding The identification information of the session; receiving the address information of the first session from the first communication device, the first session is a session corresponding to the first session parameter information in the session corresponding to the network information, and the first communication device is one of the communication devices corresponding to the network information.
  • the slave management strategy controls the network element to obtain the routing descriptor used when the terminal device accesses the application, the routing descriptor includes the first session parameter information, and provides the first session parameter information to the communication device, so that the communication
  • the device may determine the first session corresponding to the first session parameter information from one or more sessions, and the first session is the session used when the terminal device accesses the application. Then, receiving the address information of the first session from the communication device can accurately determine the address information of the session used when the terminal device accesses the application.
  • the routing descriptor used by the terminal device to access the application is obtained from the mobility management policy control network element, the routing descriptor includes network information and first session parameter information, and the network information includes data Network name and/or slice identification information; sending a fifth request message to the communication device corresponding to the network information, where the fifth request message includes the identification information of the network information or the session corresponding to the network information; receiving the communication with the network information from the communication device The address information of the session corresponding to the network information, and the session parameter information of the session corresponding to the network information; according to the session parameter information of the session corresponding to the network information and the first session parameter information, from the address of the session corresponding to the network information The address information of the first session is determined in the information, and the session parameter information of the first session is the first session parameter information.
  • the slave management policy controls the network element to obtain the routing descriptor used when the terminal device accesses the application, the routing descriptor includes the first session parameter information, and obtains the address information and address information of one or more sessions from the communication device. Session parameter information, and determine the first session corresponding to the first session parameter information from the one or more sessions, the first session is the session used when the terminal device accesses the application, and can accurately determine the terminal device Address information for the session used to access the app.
  • the address information of the communication device corresponding to the network information and the identification information of the session are obtained from the data management network element, and the communication device is a session management network element; or, from the binding support network element Obtain the address information of the communication device and the identification information of the session corresponding to the network information, where the communication device is a session management policy control network element.
  • the address information of the communication device corresponding to the network information is obtained from the binding support network element, and the communication device is a session management policy control network element.
  • the embodiment of the present application provides a communication device, and the device may be a data analysis network element, or may be a module (such as a chip) for the data analysis network element.
  • the device has the function of realizing any realization method of the first aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device, which may be a communication device, or a module (such as a chip) used for the communication device, and the communication device is a session management policy control network element or a session management network element .
  • the device has the function of realizing any realization method of the second aspect or the third aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device.
  • the device may be an application function network element, or may be a module (such as a chip) for the application function network element.
  • the device has the function of realizing any realization method of the fourth aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device.
  • the device may be a network element with a network opening function, or may be a module (such as a chip) for the network element with a network opening function.
  • the device has the function of implementing any implementation method of the fifth aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory so that the device executes Any implementation method in the first aspect to the fifth aspect above.
  • the embodiment of the present application provides a communication device, including a unit or means (means) for performing each step of any implementation method in the first aspect to the fifth aspect.
  • the embodiment of the present application provides a communication device, including a processor and an interface circuit, the processor is used to communicate with other devices through the interface circuit, and execute any implementation method in the first to fifth aspects above .
  • the processor includes one or more.
  • the embodiment of the present application provides a communication device, including a processor coupled to a memory, and the processor is used to call a program stored in the memory to execute any implementation in the first aspect to the fifth aspect above method.
  • the memory may be located within the device or external to the device. And there may be one or more processors.
  • the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when it is run on a communication device, the above-mentioned first to fifth aspects Any implementation method of is executed.
  • the embodiment of the present application also provides a computer program product, the computer program product includes a computer program or instruction, when the computer program or instruction is run by the communication device, any of the above first to fifth aspects The implementation method is executed.
  • the embodiment of the present application further provides a chip system, including: a processor, configured to execute any implementation method in the first aspect to the fifth aspect above.
  • the embodiment of the present application further provides a communication system, including a data analysis network element and an application function network element.
  • the data analysis network element is used to execute any implementation method of the first aspect.
  • the application function network element is used to receive a first request message from the data analysis network element, where the first request message includes application identification information and address information of the first session; and sends the terminal device information to the data analysis network element App data.
  • the embodiment of the present application further provides a communication system, including a data analysis network element and a communication device.
  • the communication device is configured to execute any implementation method of the second aspect.
  • the data analysis network element is configured to send a second request message to the communication device, where the second request message includes application identification information and an application start event, and where the second request message also includes network information or a session corresponding to the network information identification information; and receiving address information of a first session from the communication device, where the first session is a session in which an application start event of the application is detected in a session corresponding to the network information, and the address information of the first session is used for collecting the data of the application of the terminal device.
  • the communication device is a session management network element or a session management policy control network element.
  • the data analysis network element is further configured to send a first request message to the application function network element providing the application, where the first request message includes the identification information of the application and the address of the first session information; and receiving data of the application from the application function network element.
  • the embodiment of the present application further provides a communication system, including a data analysis network element and a communication device.
  • the communication device is configured to execute any implementation method of the third aspect.
  • the data analysis network element is configured to send a fourth request message to the communication device, where the fourth request message includes first session parameter information, and the fourth request message also includes network information or identification information of a session corresponding to the network information; and receiving address information of a first session from the communication device, where the first session is a session corresponding to the first session parameter information among the sessions corresponding to the network information, and the address information of the first session is used to collect the information of the terminal device data for this application.
  • the communication device is a session management network element or a session management policy control network element.
  • the data analysis network element is further configured to send a first request message to the application function network element providing the application, where the first request message includes the identification information of the application and the address of the first session information; and receiving data of the application from the application function network element.
  • the data analysis network element is also used to obtain the routing descriptor used by the terminal device to access the application from the mobility management policy control network element, and the routing descriptor includes network information and the first Session parameter information, the network information including data network name and/or slice identification information; sending a fifth request message to the communication device, the fifth request message including the network information or the identification information of the session corresponding to the network information; receiving from The address information of the session corresponding to the network information of the communication device, and the session parameter information of the session corresponding to the network information; and according to the session parameter information of the session corresponding to the network information and the first session parameter information, from the network
  • the address information of the first session is determined in the address information of the session corresponding to the information, and the session parameter information of the first session is the first session parameter information.
  • the embodiment of the present application also provides a communication system, including an application function network element for performing any implementation method of the fourth aspect, and a network open function network for performing any implementation method of the fifth aspect Yuan.
  • FIG. 1(a) is a schematic diagram of a communication system provided by an embodiment of the present application.
  • Figure 1(b) is a schematic diagram of another communication system provided by the embodiment of the present application.
  • Figure 2(a) is a schematic diagram of a 5G network architecture based on a service architecture
  • Figure 2(b) is a schematic diagram of a 5G network architecture based on a point-to-point interface
  • FIG. 3 is a schematic flow chart of a data collection method provided in an embodiment of the present application.
  • Figure 4(a) is a schematic flow diagram of a data collection method provided in the embodiment of the present application.
  • FIG. 4(b) is a schematic flowchart of a method for determining address information of a first session used by a terminal device to access an application provided in an embodiment of the present application;
  • FIG. 4(c) is a schematic flowchart of another method for determining the address information of the first session used by the terminal device to access the application provided by the embodiment of the present application;
  • Fig. 4(d) is a schematic flowchart of another method for determining the address information of the first session used by the terminal device to access the application provided by the embodiment of the present application;
  • Figure 4(e) is a schematic flow diagram of a data collection method provided in the embodiment of the present application.
  • FIG. 5 is a schematic flow diagram of a data collection method provided in an embodiment of the present application.
  • FIG. 6 is a schematic flow diagram of a data collection method provided in an embodiment of the present application.
  • FIG. 7 is a schematic flow diagram of a data collection method provided in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • the present application provides a communication system, which includes a data analysis network element and an application function network element.
  • the system further includes a mobility management policy control network element and/or a communication device, where the communication device is a session management network element or a session management policy control network element.
  • the data analysis network element is used to determine the address information of the first session used by the terminal device to access the application; and send a first request message to the application function network element providing the application, where the first request message includes the identification information of the application and the first session address information of a session; the address information of the first session is used to collect the application data of the terminal device; and receive the application data from the application function network element.
  • An application function network element configured to receive the first request message from the data analysis network element; and send the application data of the terminal device to the data analysis network element.
  • the data analysis network element is also used to determine and collect the data of the terminal device accessing the application.
  • the data analysis network element is used to obtain network information corresponding to the application, the network information including data network name and/or slice identification information; sending a second request message to the communication device corresponding to the network information , the second request message includes identification information of the application and an application start event, the second request message further includes identification information of the network information or a session corresponding to the network information; and receiving the first session from the first communication device address information, the first session is a session in which the application start event of the application is detected among the sessions corresponding to the network information, and the first communication device is one of the communication devices corresponding to the network information.
  • the second request message further includes session parameter information, and the session parameter information is used to determine one or more sessions in the session corresponding to the network information, and the one or more sessions are applications to be executed Start a session for event detection.
  • the data analysis network element is configured to send a third request message to the mobility management policy control network element, where the third request message includes the identification information of the terminal device and the flow descriptor of the application; and Receive the session parameter information from the mobility management policy control network element, where the session parameter information corresponds to the flow descriptor information and the identification information of the terminal device.
  • the mobility management policy control network element is used to obtain the session parameter information according to the identification information of the terminal equipment and the flow descriptor of the application, and send the session parameter information to the data analysis network element.
  • the data analysis network element is configured to obtain the routing descriptor used by the terminal device to access the application from the mobility management policy control network element, where the routing descriptor includes network information and first session parameters information, the network information includes data network name and/or slice identification information; a fourth request message is sent to the communication device corresponding to the network information, the fourth request message includes the first session parameter information, and the fourth request also includes The network information or the identification information of the session corresponding to the network information; and receiving the address information of the first session from the first communication device, the first session is the first session parameter information in the session corresponding to the network information For a corresponding session, the first communication device is one of the communication devices corresponding to the network information.
  • the data analysis network element is configured to obtain the routing descriptor used by the terminal device to access the application from the mobility management policy control network element, where the routing descriptor includes network information and first session parameters Information, the network information including data network name and/or slice identification information; sending a fifth request message to the communication device corresponding to the network information, where the fifth request message includes identification information of the network information or the session corresponding to the network information; receiving the address information of the session corresponding to the network information from the communication device, and the session parameter information of the session corresponding to the network information; according to the session parameter information of the session corresponding to the network information and the first session parameter information, from the The address information of the first session is determined in the address information of the session corresponding to the network information, and the session parameter information of the first session is the first session parameter information.
  • the data analysis network element is configured to obtain the address information of the communication device and the identification information of the session corresponding to the network information from the data management network element, where the communication device is a session management network element; or The address information of the communication device and the identification information of the session corresponding to the network information are obtained from the binding support network element, where the communication device is a session management policy control network element.
  • the system shown in Figure 1(a) can be used in the fifth generation (the 5th generation, 5G) network architecture shown in Figure 2(a) or Figure 2(b), of course, it can also be used in future network architectures,
  • the sixth generation (6th generation, 6G) network architecture, etc. are not limited in this application.
  • the present application provides a communication system, which includes a data analysis network element and a communication device, where the communication device may be a session management network element or a session management policy control network element.
  • the communication device is configured to receive a second request message from a data analysis network element, where the second request message includes application identification information and an application start event, and where the second request message also includes network information or The identification information of the session corresponding to the network information; detecting the application start event of the application on the first session of the sessions corresponding to the network information; and sending the address information of the first session to the data analysis network element, the second session
  • the address information of a session is used to collect the application data of the terminal device.
  • a data analysis network element configured to send the second request message to the communication device; and receive address information of the first session from the communication device.
  • the second request message also includes session parameter information; the communication device is further configured to determine one or more sessions corresponding to the session parameter information in the session corresponding to the network information; Detection of an application start event is performed by one or more sessions, including the first session.
  • the data analysis network element is further configured to send a first request message to the application function network element providing the application, where the first request message includes the identification information of the application and the address of the first session information; and receiving data of the application from the application function network element.
  • the data analysis network element is also used to determine and collect the data of the terminal device accessing the application.
  • the communication device is configured to receive a fourth request message from the data analysis network element, the fourth request message includes the first session parameter information, and the fourth request message also includes network information or the network information
  • the identification information of the corresponding session acquire the address information of the first session, the first session is the session corresponding to the first session parameter information among the sessions corresponding to the network information; and send the first session to the data analysis network element
  • the address information of the session, the address information of the first session is used to collect the application data of the terminal device.
  • a data analysis network element configured to send the fourth request message to the communication device, and receive address information of the first session from the communication device.
  • the data analysis network element is further configured to send a first request message to the application function network element providing the application, where the first request message includes the identification information of the application and the address of the first session information; and receiving data of the application from the application function network element.
  • the data analysis network element is also used to determine and collect the data of the terminal device accessing the application.
  • the data analysis network element is also used to obtain the routing descriptor used by the terminal device to access the application from the mobility management policy control network element, and the routing descriptor includes network information and the first Session parameter information, the network information including data network name and/or slice identification information; sending a fifth request message to the communication device, the fifth request message including the network information or the identification information of the session corresponding to the network information; receiving from The address information of the session corresponding to the network information of the communication device, and the session parameter information of the session corresponding to the network information; and according to the session parameter information of the session corresponding to the network information and the first session parameter information, from the network
  • the address information of the first session is determined in the address information of the session corresponding to the information, and the session parameter information of the first session is the first session parameter information.
  • the system shown in Figure 1(b) can be used in the 5G network architecture shown in Figure 2(a) or Figure 2(b). Of course, it can also be used in future network architectures, such as 6G network architectures. This application does not Do limited.
  • next generation mobile communication network system Next Generation System
  • 5G network architecture Next Generation Mobile communication network system
  • This architecture not only supports wireless access technologies (such as long term evolution (LTE) access technologies, 5G radio access network (RAN) access technologies, etc.) defined by the 3GPP standard group to access the 5G core Network (core network, CN), and supports the use of non-3GPP (non-3GPP) access technology through non-3GPP interworking function (non-3GPP interworking function, N3IWF) or next generation access gateway (next generation packet data gateway, ngPDG) Access to the core network.
  • LTE long term evolution
  • RAN radio access network
  • N3IWF non-3GPP interworking function
  • N3IWF next generation access gateway
  • ngPDG next generation packet data gateway
  • FIG. 1 is a schematic diagram of a 5G network architecture based on a service-based architecture.
  • the 5G network architecture shown in FIG. 1 may include terminal equipment, access network equipment, and core network equipment.
  • the terminal device accesses the data network (data network, DN) through the access network device and the core network device.
  • data network data network
  • the core network equipment includes but not limited to some or all of the following network elements: authentication server function (authentication server function, AUSF) network element (not shown in the figure), unified data management (unified data management, UDM) network element, unified data repository (unified data repository, UDR) network element, network repository function (network repository function, NRF) network element (not shown in the figure), network exposure function (network exposure function, NEF) network element (not shown in the figure) shown), application function (application function, AF) network element, policy control function (policy control function, PCF) network element, access and mobility management function (access and mobility management function, AMF) network element, session management function (session management function, SMF) network element, user plane function (user plane function, UPF) network element, binding support function (binding support function, BSF) network element (not shown in the figure), network data analysis function (network data analysis function, NWDAF) network element (not shown in the figure).
  • authentication server function authentication server function, AUSF
  • UDM unified data management
  • the terminal device may be a user equipment (user equipment, UE), a mobile station, a mobile terminal, and the like.
  • Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminal devices can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, urban air vehicles (such as drones, helicopters, etc.), ships, robots, robotic arms, smart home devices, etc.
  • the access network device may be a radio access network (RAN) device or a wired access network (wireline access network, FAN) device.
  • the wireless access network equipment includes 3GPP access network equipment, untrusted non-3GPP access network equipment and trusted non-3GPP access network equipment.
  • 3GPP access network equipment includes but not limited to: evolved base station (evolved NodeB, eNodeB) in LTE, next generation base station (next generation NodeB, gNB) in 5G mobile communication system, base station or completed base station in future mobile communication system Partial functional modules or units, such as centralized unit (central unit, CU), distributed unit (distributed unit, DU), etc.
  • Untrusted non-3GPP access network equipment includes but not limited to: untrusted non-3GPP access gateway or N3IWF equipment, untrusted wireless local area network (wireless local area network, WLAN) access point (access point, AP), switch ,router.
  • Trusted non-3GPP access network devices include, but are not limited to: trusted non-3GPP access gateways, trusted WLAN APs, switches, and routers.
  • Wired access network equipment includes but not limited to: wired access gateway (wireline access gateway), fixed telephone network equipment, switches, routers.
  • Access network equipment and terminal equipment can be fixed or mobile. Access network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the access network device and the terminal device.
  • the AMF network element includes functions such as mobility management and access authentication/authorization. In addition, it is also responsible for transferring user policies between terminal equipment and PCF.
  • the SMF network element includes the functions of executing session management, executing the control strategy issued by the PCF, selecting UPF, and assigning the Internet protocol (internet protocol, IP) address of the terminal device, etc.
  • the UPF network element includes functions such as user plane data forwarding, session/flow-based charging statistics, and bandwidth limitation.
  • UDM network element including the execution management of subscription data, user access authorization and other functions.
  • UDR including the access function of execution contract data, policy data, application data and other types of data.
  • NEF network elements are used to support the opening of capabilities and events.
  • the AF network element transmits the requirements from the application side to the network side, such as QoS requirements or user status event subscription.
  • the AF may be a third-party functional entity, or an application service deployed by an operator, such as an IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) voice call service.
  • IP Multimedia Subsystem IP Multimedia Subsystem
  • the AF network element includes an AF network element in the core network (that is, an operator's AF network element) and a third-party AF network element (such as an application server of an enterprise).
  • the PCF network element includes policy control functions such as charging for sessions and service flow levels, QoS bandwidth guarantee, mobility management, and terminal policy decision-making.
  • PCF network elements include access and mobility management policy control function (access and mobility management policy control function, AM PCF) network elements and session management policy control function (session management PCF, SM PCF) network elements, AM PCF network elements can To provide mobility management policies, SM PCF network elements can provide session management policies.
  • the NRF network element can be used to provide a network element discovery function, and provide network element information corresponding to the network element type based on the request of other network elements.
  • NRF also provides network element management services, such as network element registration, update, de-registration, network element status subscription and push, etc.
  • BSF network element can provide functions such as BSF service registration/deregistration/update, connection detection with NRF, creation of session binding information, acquisition of UE information, query of session binding information with duplicate IP addresses, etc.
  • the AUSF network element is responsible for authenticating users to determine whether users or devices are allowed to access the network.
  • NWDAF network elements are mainly used to collect data (including one or more of terminal equipment data, access network equipment data, core network network element data, and third-party application data), and provide data analysis services based on machine learning models, Data analysis results can be output for network, network management, and application execution policy decisions.
  • a NWDAF network element may be a single network element, or it may be set up together with other network elements, for example, the NWDAF network element is set in a PCF network element or an AMF network element.
  • DN is a network outside the operator's network.
  • the operator's network can access multiple DNs, and various services can be deployed on the DN, which can provide data and/or voice services for terminals.
  • DN is a private network of a smart factory.
  • the sensors installed in the workshop of the smart factory can be terminals, and the control server of the sensors is deployed in the DN, and the control server can provide services for the sensors.
  • the sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions.
  • DN is a company's internal office network.
  • the mobile phone or computer of the company's employees can be a terminal, and the employee's mobile phone or computer can access information and data resources on the company's internal office network.
  • Npcf, Nufr, Nudm, Naf, Namf, and Nsmf are the service interfaces provided by the above-mentioned PCF, UDR, UDM, AF, AMF, and SMF, respectively, and are used to call corresponding service operations.
  • N1, N2, N3, N4, and N6 are interface serial numbers. The meanings of these interface serial numbers are as follows:
  • N1 the interface between the AMF and the terminal device, which can be used to transmit non-access stratum (non access stratum, NAS) signaling (such as including QoS rules from the AMF) to the terminal device.
  • non-access stratum non access stratum, NAS
  • N2 the interface between the AMF and the access network device, which can be used to transfer radio bearer control information from the core network side to the access network device.
  • N3 the interface between the access network device and the UPF, mainly used to transfer the uplink and downlink user plane data between the access network device and the UPF.
  • N4 The interface between SMF and UPF, which can be used to transfer information between the control plane and the user plane, including controlling the delivery of forwarding rules, QoS rules, traffic statistics rules, etc. for the user plane, as well as user plane information report.
  • N6 interface between UPF and DN, used to transmit uplink and downlink user data flow between UPF and DN.
  • Figure 2(b) is a schematic diagram of a 5G network architecture based on a point-to-point interface, and the introduction of the functions of the network elements can refer to the introduction of the functions of the corresponding network elements in Figure 2(a), and will not be repeated here.
  • the main difference between Figure 2(b) and Figure 2(a) is that the interface between each control plane network element in Figure 2(a) is a service interface, and each control plane network element in Figure 2(b) The interface between them is a point-to-point interface.
  • N1, N2, N3, N4 and N6 interfaces can refer to the foregoing description.
  • N5 the interface between the AF and the PCF, which can be used for sending application service requests and reporting network events.
  • N7 the interface between PCF and SMF, which can be used to deliver protocol data unit (protocol data unit, PDU) session granularity and service data flow granularity control policy.
  • protocol data unit protocol data unit
  • PDU protocol data unit
  • N8 The interface between AMF and UDM, which can be used for AMF to obtain subscription data and authentication data related to access and mobility management from UDM, and for AMF to register information related to terminal equipment mobility management with UDM.
  • N9 a user plane interface between UPF and UPF, used to transmit uplink and downlink user data flows between UPFs.
  • N10 the interface between SMF and UDM, which can be used for SMF to obtain session management-related subscription data from UDM, and for SMF to register terminal device session-related information with UDM.
  • N11 The interface between SMF and AMF, which can be used to transfer the PDU session tunnel information between the access network device and UPF, transfer the control message sent to the terminal device, and transfer the wireless resource sent to the access network device control information, etc.
  • N15 the interface between the PCF and the AMF, which can be used to issue terminal policies and access control-related policies.
  • N35 the interface between UDM and UDR, which can be used for UDM to obtain user subscription data information from UDR.
  • N36 the interface between PCF and UDR, which can be used for PCF to obtain policy-related subscription data and application data-related information from UDR.
  • the above-mentioned network element or function may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • a platform for example, a cloud platform.
  • the foregoing network element or function may be implemented by one device, or jointly implemented by multiple devices, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application.
  • data analysis network element can be NWDAF network elements, UDM network elements, AMF network elements, SMF network elements, UPF network elements, AM PCF network elements, SM PCF network elements, AF network elements, and BSF network elements in the 5G system.
  • NWDAF network element UDM network element, AMF network element, SMF network element, UPF network element, AM PCF network element, SM PCF network element, AF network element, and BSF network element in future communications such as 6G networks network elements, which is not limited in this application.
  • the data analysis is performed with NWDAF network element, UDM network element, AMF network element, SMF network element, UPF network element, AM PCF network element, SM PCF network element, AF network element, and BSF network element respectively Network elements, data management network elements, mobility management network elements, session management network elements, user plane network elements, mobility management policy control network elements, session management policy control network elements, application function network elements, and binding support network elements An example is described.
  • NWDAF network elements, UDM network elements, AMF network elements, SMF network elements, UPF network elements, AM PCF network elements, SM PCF network elements, AF network elements, and BSF network elements are referred to as NWDAF, UDM, AMF, and SMF respectively.
  • UPF, AM PCF, SM PCF, AF, BSF are referred to as NWDAF, UDM, AMF, and SMF respectively.
  • FIG. 3 it is a schematic flowchart of the analysis method provided in the embodiment of the present application. The method includes the following steps:
  • step 301 the NWDAF determines to collect data on applications accessed by terminal devices.
  • NWDAF determines to collect data on applications accessed by terminal devices according to the subscription request.
  • the subscription request carries identification information of an application and identification information of at least one terminal device
  • the subscription request is used to request to subscribe to service experience information and/or service flow characteristic information of the at least one terminal device to access the application
  • the NWDAF determines to collect the data of the at least one terminal device accessing the application, so that the subsequent NWDAF can determine the service experience information and /or service flow characteristic information.
  • the subscription request carries the identification information of the application and the identification information of the terminal device group
  • the terminal device group includes one or more terminal devices
  • the subscription request is used to request to subscribe to the terminal device group
  • NWDAF determines to collect the data of terminal devices in the terminal device group accessing the application, so that subsequent NWDAF can
  • the terminal devices in the device group access the data of the application, and the service experience information and/or service flow characteristic information of the terminal devices in the terminal device group accessing the application are determined.
  • the subscription request carries application identification information and area identification information
  • the area indicated by the area identification information includes one or more terminal devices
  • the subscription request is used to request to subscribe to the area indicated by the area identification information
  • NWDAF determines to collect the application data accessed by terminal devices in the area indicated by the area identification information, so that subsequent NWDAF can collect
  • the terminal device in the area indicated by the area identification information accesses the data of the application, and it is determined that the terminal device in the area indicated by the area identification information accesses the service experience information and/or service flow characteristic information of the application.
  • Step 302 NWDAF acquires network information corresponding to AF, the network information includes DNN and/or slice identification information, and the slice identification information may be single network slice selection assistance information (single network slice selection assistance information, S-NSSAI).
  • the AF here refers to the AF corresponding to the application, that is, the AF that deploys or provides the application.
  • the number of network information corresponding to the AF acquired by the NWDAF may be one or more.
  • the NWDAF can acquire the network information corresponding to the AF from the NRF.
  • the AF can send a registration message to the NRF.
  • the registration message includes the address information of the AF and the network information that the terminal device may use to access the application on the AF, so as to realize the registration of the network information that the terminal device may use to access the application on the AF.
  • NRF NRF. Therefore, the NWDAF can send a discovery request message to the NRF, the discovery request message includes the address information of the AF, and the discovery request message is used to request to obtain the network information corresponding to the AF, so that the NRF returns the network information corresponding to the AF to the NWDAF.
  • the NWDAF can determine the network information corresponding to the AF according to the local configuration.
  • step 303 the NWDAF sends a query request message to the UDM.
  • the UDM receives the query request message.
  • the query request message may be a Nudm_UECM_Get_Request message.
  • the query request message includes the identification information of the terminal device and the network information corresponding to the AF, and the query request message is used to request to query the identification information of the SMF that provides services for the terminal device and corresponds to the network information.
  • the quantity of network information corresponding to AF may be one or more.
  • step 304 the UDM sends a query response message to the NWDAF.
  • the NWDAF receives the query response message.
  • the query response message may be a Nudm_UECM_Get_Response message.
  • the UDM After receiving the query request message, the UDM will query the address information of one or more SMFs and the identification information of the PDU session corresponding to each SMF according to the identification information of the terminal device and the network information corresponding to the AF, and send The address information and the identification information of the PDU session are carried in the query response message and returned to NWDAF.
  • information such as the address information of the SMF and the identification information of the PDU session stored on the UDM may be registered to the UDM by the SMF.
  • the AMF will select a service SMF for the terminal device's PDU session, and then the SMF can send a registration request message to the UDM, which carries the terminal device's identification information, network information, The identification information of the SMF, the address information of the SMF, and the identification information of the PDU session.
  • Registration information 1 of SMF1 identification information of terminal device 1, network information 1, address information of SMF1, identification information of SMF1, identification information of PDU session 1, and identification information of PDU session 2;
  • Registration information 2 of SMF2 identification information of terminal device 1, network information 2, address information of SMF2, identification information of SMF2 and identification information of PDU session 3;
  • Registration information 3 of SMF3 identification information of terminal device 2, network information 3, address information of SMF3, identification information of SMF3 and identification information of PDU session 4;
  • Registration information 4 of SMF4 identification information of terminal device 3, network information 4, address information of SMF4, identification information of SMF4 and identification information of PDU session 5.
  • each registration information includes identification information of a terminal device, network information, address information of an SMF, identification information of an SMF, and identification information of one or more PDU sessions.
  • the same network information corresponds to the identification information of one or more PDU sessions.
  • the above network information 1 corresponds to the identification information of two PDU sessions, which are respectively the identification information of PDU session 1 and the identification information of PDU session 2.
  • the above network information 2 , network information 3 and network information 4 all correspond to identification information of one PDU session.
  • the query response message may carry address information of multiple SMFs and each SMF Identification information of the corresponding PDU session.
  • the above query request message includes the identification information of terminal device 1, network information 1, and network information 2, and the query response message includes the address information of SMF1, the identification information of PDU session 1 corresponding to SMF1, and the identification information of PDU session 2 , address information of SMF2, and identification information of PDU session 3 corresponding to SMF2.
  • the query response message may also carry address information of an SMF and identification information of a PDU session corresponding to the SMF.
  • step 305 the NWDAF sends a subscription request message to the SMF, and the SMF receives the subscription request message accordingly.
  • the subscription request message carries the event identifier and the identifier information of the terminal device.
  • the subscription request message also includes the network information corresponding to the AF or the identifier information of the PDU session corresponding to the SMF.
  • the event identifier is an address assignment event, and the subscription request message is used for Subscribe to the address information allocated for the PDU session of the terminal device.
  • the address information can be IPv4 address, IPv6 prefix or Ethernet address, etc.
  • the NWDAF sends a subscription request message to each SMF respectively.
  • NWDAF receives the address information of SMF1, the identification information of PDU session 1 corresponding to SMF1 and the identification information of PDU session 2, the address information of SMF2, and the identification information of PDU session 3 corresponding to SMF2 in the above step 304, then NWDAF based on The address information of SMF1 sends a subscription request message to SMF1.
  • the subscription request message carries the event identifier and the identification information of the terminal device.
  • the subscription request message also carries network information 1 or carries the identification information of PDU session 1 and the PDU session 2. Identification information.
  • NWDAF sends a subscription request message to SMF2 based on the address information of SMF2.
  • the subscription request message carries the event identifier and the identification information of the terminal device.
  • the subscription request message also carries the network information 2 or the identification information of the PDU session 3.
  • the subscription request message may be an Nsmf_EventExposure_Subscribe Request message.
  • step 306 the SMF sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message may be an Nsmf_EventExposure_Subscribe Response message.
  • the subscription response message is used to notify that the subscription is successful.
  • This step 306 is an optional step.
  • step 307 the SMF sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the notification message may be an Nsmf_EventExposure_Notify message.
  • each SMF sends a notification message to NWDAF respectively, and each notification message carries address information of one or more PDU sessions of the terminal device, and the address information can be IPv4 address, IPv6 prefixes, Ethernet addresses, etc.
  • each SMF obtains the address information of the PDU session corresponding to the identification information of the PDU session according to the identification information of the PDU session in the subscription request message, and sends the address information of the PDU session to the NWDAF.
  • each SMF obtains the address information of the PDU session corresponding to the network information according to the network information in the subscription request message, and sends the address information of the PDU session to the NWDAF.
  • NWDAF may receive the address information of one PDU session, and may also receive the address information of multiple PDU sessions.
  • step 308 the NWDAF sends a data subscription request message to the AF.
  • the AF receives the data subscription request message.
  • the data subscription request message carries application identification information and address information of one or more PDU sessions.
  • the data subscription request message is used to request the PDU session to access the data of the application.
  • the data subscription request is used to request the AF to collect data related to the application from the terminal device.
  • the data subscription request is used to request the AF to collect data from the application of the terminal device (Datacollection from UE application to AF), and the collected data is used as an input of the NWDAF to generate an analysis result.
  • the terminal device will only access the service of the application on the AF through one PDU session, so if the data subscription request message carries the address information of multiple PDU sessions of a terminal device, only one PDU session in the multiple PDUs is used to access the AF An application on the AF, and other PDU sessions will not be used to access the application on the AF. That is, one application on one AF will only be accessed by one PDU session of one terminal device, and will not be accessed by multiple PDU sessions of the terminal device at the same time.
  • step 309 the AF sends a data subscription response message to the NWDAF.
  • the NWDAF receives the data subscription response message.
  • the data subscription response message is used to notify that the subscription is successful.
  • This step 309 is an optional step.
  • step 310 the AF sends a notification message to the NWDAF.
  • the NWDAF receives the notification message.
  • the AF can determine the address information of the PDU session actually used to access the application.
  • the address information of the PDU session actually used to access the application is the first data subscription request message carried in step 308.
  • Address information of a PDU session which is hereinafter referred to as a first PDU session.
  • AF can perform data collection and statistics of the service flow corresponding to the first PDU session, obtain the data of the terminal device accessing the application through the first PDU session, and store the data of the terminal device accessing the application through the first PDU session
  • the notification message carried in step 310 is sent to NWDAF.
  • the terminal device accesses the application through the first PDU session, it can be understood that the source address carried in the service message sent by the terminal device to the AF is the address information of the first PDU session.
  • the identification information of the application is divided into an internal application identification (internal applicaiton ID) and an external application identification (external applicaiton ID).
  • internal applicaiton ID an internal application identification
  • external applicaiton ID an external application identification
  • the network information that may be used by any terminal device to access any application on the AF1 includes network information 1 , network information 2 and network information 3 .
  • Each network information includes a DNN and/or a slice identification information.
  • NWDAF needs to collect the data when terminal device 1 accesses application 1 on AF1, NWDAF will send the identification information of terminal device 1, network information 1, network information 2 and network information 3 to UDM, where UDM stores the following SMF data:
  • Registration information 1 of SMF1 identification information of terminal device 1, network information 1, address information of SMF1, identification information of SMF1, identification information of PDU session 1, and identification information of PDU session 2;
  • Registration information 2 of SMF2 identification information of terminal device 1, network information 2, address information of SMF2, identification information of SMF2 and identification information of PDU session 3;
  • Registration information 3 of SMF3 identification information of terminal device 2, network information 3, address information of SMF3, identification information of SMF3 and identification information of PDU session 4;
  • Registration information 4 of SMF4 identification information of terminal device 3, network information 4, address information of SMF4, identification information of SMF4 and identification information of PDU session 5.
  • the result returned by UDM to NWDAF is: the address information of SMF1, the identification information of PDU session 1 and PDU session 2 corresponding to SMF1, the identification information of SMF2, and the identification information of PDU session 3 corresponding to SMF2.
  • NWDAF sends the event identifier and the identifier information of terminal device 1 to SMF1, and also sends network information 1 or sends the identifier information of PDU session 1 and the identifier information of PDU session 2, and receives the address information and address information of PDU session 1 from SMF1.
  • the address information of PDU session 2 and NWDAF sends the event identifier and the identification information of terminal device 1 to SMF2, and also sends network information 1 or the identification information of PDU session 3, and receives the address information of PDU session 3 from SMF2.
  • NWDFA sends the identification information of application 1, the address information of PDU session 1, the address information of PDU session 2 and the address information of PDU session 3 to AF1. NWDAF hopes to obtain the data when terminal device 1 accesses application 1 from AF1.
  • AF1 collects the data when terminal device 1 accesses application 1 using PDU session 1 and returns it to NWDAF, where PDU session 1 is the PDU session actually used when terminal device 1 accesses application 1 on AF1.
  • step 311 the NWDAF determines the service experience information and/or service flow characteristic information of the terminal device accessing the application according to the data of the terminal device accessing the application.
  • This step 311 is an optional step.
  • the service experience information includes, but is not limited to: one or more of service level agreement (service level agreement, SLA) satisfaction, time delay, packet loss rate, user satisfaction, and the like.
  • service level agreement service level agreement
  • SLA service level agreement
  • Service flow feature information includes, but is not limited to: one or more of packet header features, flow statistical features (such as period, packet size), etc.
  • NWDAF can collect data from the AF that the terminal device accesses an application in the AF, and analyze the collected data to obtain service experience information and/or service flow characteristic information of the terminal device accessing the application, Accurate analysis of application experience can be achieved.
  • the terminal device when the terminal device accesses the application of AF, there may be multiple network information that can be used.
  • the terminal device will use one network information of the multiple network information to access the application of the AF, such as based on the terminal device Location, subscription data, etc., select one network information from multiple network information to access the AF application, so the network information used by the terminal device to actually access the AF application is not fixed.
  • the current protocol allows terminal devices to create multiple PDU sessions under the same network information, for example, these PDU sessions correspond to different access technologies (such as 3GPP access, non-3GPP access) or session and service continuity (session and service continuity, SSC) mode.
  • NWDAF will actually obtain the address information of multiple PDU sessions of the terminal device, but in fact only the address information of one PDU session will be used by the terminal device to access the AF application. Since NWDAF does not know which PDU session address information will be used by the terminal device to access the application of AF, when NWDAF requests AF to obtain the data of a PDU session to access an application, NWDAF will obtain all the PDUs of the terminal device The address information of the session is sent to the AF, and the AF judges the address information of the PDU session actually used by the application that the terminal device accesses the AF.
  • NWDAF sends the address information of all PDU sessions that the terminal device may access the application to the AF, and only one of the PDU session address information is used by the terminal device to access the application of the AF, it will cause There is a security risk, that is, the address information of the PDU session that the AF should not perceive is incorrectly provided to the AF.
  • Fig. 4(a) is a schematic flow chart of a data collection method provided by the embodiment of the present application. The method includes the following steps:
  • step 401a the NWDAF determines to collect the data of the terminal device's access to the application.
  • This step is the same as the above-mentioned step 301, and reference may be made to the foregoing description.
  • This step 401a is an optional step.
  • step 402a the NWDAF determines the address information of the first session used by the terminal device to access the application.
  • the NWDAF determines the address information of the first session used by the specific terminal device to access the specific application.
  • the NWDAF determines the address information of the first session used by the first terminal device to access the first application.
  • the session may be a PDU session, and the address information may be an IPv4 address, an IPv6 prefix, or an Ethernet address.
  • the first session refers to the session actually used by the terminal device to access a certain application.
  • step 403a the NWDAF sends a first request message (also referred to as request message 1) to the AF providing the application, where the first request message includes the identification information of the application and the address information of the first session.
  • the AF receives the first request message.
  • the first request message is used to request the terminal device to access data of the application through the first session.
  • the AF receives the data that the terminal device accesses the application, and then the AF preprocesses the received data, and then sends the processed data to the NWDAF.
  • the first request message is used to request the AF to collect data related to the application from the terminal device.
  • the first request message is used to request the AF to collect data from the application of the terminal device (Datacollection from UE application to AF).
  • the first request message may be a data subscription request message.
  • step 404a the AF sends to the NWDAF the data that the terminal device accesses the application through the first session.
  • the NWDAF receives the data that the terminal device accesses the application through the first session.
  • NWDAF can determine the service experience information and/or service flow of the terminal device accessing the application through the first session based on the data of the terminal device accessing the application through the first session characteristic information.
  • service experience information and service flow feature information For the content of the service experience information and service flow feature information, reference may be made to the description of step 311 above.
  • NWDAF can determine the address information of the session used by the terminal device to access the application, so that it only needs to provide the address information of the one session to the AF, and will not share the address information of all sessions of the terminal device that may access the application All are sent to the AF, which avoids exposing the session information of the terminal device that should not be perceived by the AF to the AF, and reduces security risks.
  • the NWDAF may determine the address information of the first session used by the terminal device to access the application according to various methods. Three methods for determining the address information of the first session used by the terminal device to access the application are introduced below with reference to the accompanying drawings.
  • FIG. 4( b ) it is a schematic flowchart of a method for determining address information of a first session used by a terminal device to access an application provided by an embodiment of the present application.
  • the method includes the following steps:
  • the NWDAF acquires network information corresponding to the application, and the network information includes DNN and/or slice identification information.
  • the NWDAF may acquire the network information corresponding to the AF providing the application from the NRF, and use the network information corresponding to the AF as the network information corresponding to the application.
  • the implementation method for the NWDAF to obtain the network information corresponding to the AF from the NRF may refer to the description of step 302 .
  • the NWDAF can determine the network information corresponding to the AF according to the local configuration.
  • NWDAF can also obtain the network information corresponding to the application from the AM PCF.
  • NWDAF sends a third request message (also referred to as request message 3) to AM PCF, the third request message includes the identification information of the terminal device and the flow descriptor (TrafficDescriptor) of the application, and the flow descriptor includes the application identifier ( APP ID), triplet, fully qualified domain name (fully qualified domain name, FQDN) or uniform resource locator (uniform resource locator, URL).
  • APP ID application identifier
  • APP ID application identifier
  • APP ID fully qualified domain name
  • FQDN uniform resource locator
  • URL uniform resource locator
  • step 402b the NWDAF acquires the identification information of the communication device corresponding to the network information and the session corresponding to the network information.
  • the communication device is an SMF
  • the NWDAF can send the identification information of the terminal device and the network information corresponding to the application to the UDM, and the UDM obtains the identification information corresponding to the terminal device according to the identification information of the terminal device and the network information
  • the communication device is an SM PCF
  • the NWDAF can send the identification information of the terminal device and the network information corresponding to the application to the BSF, and the BSF obtains the information related to the terminal device according to the identification information of the terminal device and the network information.
  • the address information of the SM PCF corresponding to the identification information of the network information and the network information, and the identification information of the session corresponding to the identification information of the terminal equipment and the network information.
  • the communication device is the SM PCF
  • the SM PCF may not store session identification information
  • the NWDAF can send the identification information of the terminal device to the BSF
  • the BSF obtains the information related to the terminal device according to the identification information of the terminal device.
  • the address information of the SM PCF corresponding to the identification information of the terminal equipment.
  • the address information of the SMF may be the unique identifier, IP address or FQDN of the SMF, etc., which is not limited in this application.
  • the address information of the SM PCF can be the unique identifier, IP address or FQDN of the SMF, etc., which is not limited in this application.
  • step 403b the NWDAF sends a second request message (also referred to as request message 2) to the communication device.
  • the communication device receives the second request message.
  • the second request message includes application identification information and an application start event, and the second request message also includes network information or identification information of a session corresponding to the network information, and the application start event is used for the application in the session corresponding to the network information Start.
  • the second request message also includes session parameter information corresponding to the application, and the session parameter information includes one or more of the following information: SSC mode, access type (AccessType) or session type (SessionType).
  • the session parameter information corresponding to the application may be obtained by NWDAF from AM PCF.
  • NWDAF sends a third request message to AM PCF
  • NWDAF receives from AM PCF the same
  • the network information corresponding to the application on the other hand, the NWDAF can also receive the session parameter information corresponding to the application from the AM PCF.
  • the SSC modes include SSC mode 1, SSC mode 2 and SSC mode 3.
  • SSC mode 1 requires the session to keep the IP address unchanged during its lifetime.
  • SSC mode 2 does not provide any business continuity, and completely relies on the application function network element to perform business continuity guarantee.
  • SSC mode 3 adopts the method of first establishing a new side link and then releasing the old side link, which ensures session continuity to a certain extent, but service continuity also depends on application function network elements.
  • the access type includes 3GPP access and non-3GPP (Non-3GPP) access.
  • the session type includes IP type, Ethernet type or Unstructured type.
  • step 404b the communication device detects an application start event of the application on the first session.
  • the communication device when the second request message includes network information, the communication device first obtains locally the identification information of the session corresponding to the network information according to the network information, and then according to the identification information of the session corresponding to the network information, the communication device All sessions corresponding to the network information respectively perform application event detection of the application, and an application start event of the application is detected in the first session among them.
  • the communication device detects the application event of the application for all the sessions corresponding to the network information according to the identification information of the session corresponding to the network information, and the first A session above detects the app's app start event.
  • the above-mentioned second request message includes not only network information or identification information of a session corresponding to the network information, but also session parameter information corresponding to the application.
  • the communication device first obtains locally the identification information of the session corresponding to the network information according to the network information, and if the second request message includes the identification information of the session corresponding to the network information, then the communication device The device obtains the identification information of the session corresponding to the network information from the second request message.
  • the communication device screens the sessions corresponding to the network information to obtain the sessions matching the session parameter information, and then performs the detection of the application start event of the application on these matching sessions, and An application start event of the application in which the first session is detected above.
  • the second request message carries identification information of five sessions, which are identification information of session 1, identification information of session 2, identification information of session 3, identification information of session 4, and identification information of session 5, and The second request message also carries three pieces of session parameter information corresponding to the application, which are session parameter information 1, session parameter information 2, and session parameter information 3, respectively.
  • the session parameter information corresponding to session 1 is the same as session parameter information 1
  • the session parameter information corresponding to session 2 is the same as session parameter information 2
  • the session parameter information corresponding to session 3 is the same as session parameter information 1, session parameter 2, and session parameter 3.
  • the session 1 matches the session parameter information 1
  • the session 2 matches the session parameter information 2
  • the communication device determines that the application event detection of the application is executed on the session 1 and the session 2, and the application event detection of the application is not executed on the session 3.
  • the application event detection in this way, can reduce the number of sessions that perform the application event detection of the application, and can reduce the overhead of the communication device.
  • Step 405b the first communication device sends the address information of the first session to the NWDAF.
  • the NWDAF receives the address information of the first session.
  • the address information of the first session is used for collecting data of the terminal device accessing the application through the first session.
  • the address of the first session is used to collect data of the application of the terminal device.
  • the first communication device here is one of the communication devices corresponding to the network information, that is, the communication device that detects the application start event of the application. Since the terminal device will only access the AF application in one session, other communication devices will not detect the application start event of the application in other sessions, so only one communication device, such as the first communication device, can detect the application The app start event for .
  • the communication device (such as SMF or SM PCF) performs the detection of the application start event on one or more sessions provided by the NWDAF.
  • the application start event of the application is detected on a certain session, such as the first session, then It indicates that the terminal device is an application that accesses the AF in the first session, and then the first communication device provides the address information of the first session to the NWDAF.
  • FIG. 4( c ) it is a schematic flowchart of another method for determining address information of a first session used by a terminal device to access an application provided by an embodiment of the present application.
  • the method includes the following steps:
  • Step 401c NWDAF acquires from AM PCF the routing selection descriptor (routing selection descriptor, RSD) used by the terminal device to access the application, the RSD includes network information and first session parameter information, the network information includes data network name and/or slice identifier information.
  • RSD routing selection descriptor
  • NWDAF sends the identification information of the terminal device and the flow descriptor of the application to AM PCF, and the flow descriptor includes application identification (APP ID), triplet, FQDN or URL.
  • the AM PCF obtains one or more RSDs corresponding to the identification information of the terminal device and the flow descriptor of the application according to the identification information of the terminal device and the flow descriptor of the application, and each RSD includes the flow descriptor , a piece of network information and a piece of session parameter information, where the session parameter information includes one or more of the following information: SSC mode, access type or session type.
  • the AM PCF selects one RSD from one or more RSDs corresponding to the identification information of the terminal device and the flow descriptor of the application and sends the selected RSD to the NWDAF. For example, select the RSD with the highest priority among the one or more RSDs, or select the intersection of the RSD corresponding to the Allowed NSSAI and the above-mentioned one or more RSDs according to the slice information (that is, the Allowed NSSAI) that is allowed to be accessed by the terminal device. Concentrate on the highest priority RSD.
  • the one or more RSDs corresponding to the identification information of the terminal device and the stream descriptor of the application include RSD1, RSD2, RSD3 and RSD4, and the priorities from high to low are: RSD1, RSD2, RSD3, RSD4.
  • the network information in RSD1 includes S-NSSAI1
  • the network information in RSD2 includes S-NSSAI2
  • the network information in RSD3 includes S-NSSAI3
  • the network information in RSD4 includes S-NSSAI4
  • Allowed NSSAI includes S-NSSAI1, S-NSSAI2 and S-NSSAI5, so the intersection of the RSD corresponding to the Allowed NSSAI and the above-mentioned one or more RSDs includes RSD1 and RSD2, then select the RSD1 with the highest priority from RSD1 and RSD2, and the RSD1 is the terminal device access The RSD used by the application.
  • step 402c the NWDAF acquires the identification information of the communication device corresponding to the network information and the session corresponding to the network information.
  • step 403c the NWDAF sends a fourth request message (also referred to as request message 4) to the communication device.
  • the communication device receives the fourth request message.
  • the quantity of the communication equipment here can be one or more, and this communication equipment can be SMF or SM PCF.
  • the fourth request message includes the first session parameter information, and further includes network information or identification information of a session corresponding to the network information.
  • Step 404c detecting a session matching the first session parameter information.
  • the communication device After receiving the first session parameter information and the network information or the identification information of the session corresponding to the network information, the communication device determines whether there is a session matching the first session parameter information among the sessions corresponding to the network information. Wherein, if the network information is carried in the fourth request message, the communication device first needs to acquire a session corresponding to the network information locally according to the network information. Exemplarily, a certain communication device receives the first session parameter information, the identification information of session 1, the identification information of session 2, and the identification information of session 3, if the communication device determines that the session parameter information corresponding to session 1 is the same as the first If the session parameter information is the same, the session 1 matches the first session parameter information, and the communication device acquires the address information of the session 1.
  • a certain communication device receives the first session parameter information and network information, the communication device first determines the identification information of session 1, the identification information of session 2 and the identification of session 3 corresponding to the network information according to the network information information, wherein, if the communication device determines that the session parameter information corresponding to the session 1 is the same as the first session parameter information, the session 1 matches the first session parameter information, and the communication device acquires the address information of the session 1.
  • the session matching the first session parameter information is referred to as the first session, that is, the first session is a session corresponding to the first session parameter information among the sessions corresponding to the network information.
  • the communication device that detects the session matching the first session parameter information is referred to as the first communication device. Since the terminal device will only access the AF application in one session, other communication devices will not detect a session that matches the first session parameter information, so only one communication device, that is, the first communication device, can detect a session that matches the first session parameter information. The session for which the session parameter information matches.
  • Step 405c the first communication device sends the address information of the first session to the NWDAF.
  • the NWDAF receives the address information of the first session.
  • the address information of the first session is used for collecting data of the terminal device accessing the application through the first session.
  • the first communication device is one of the communication devices corresponding to the network information.
  • the communication device judges whether one or more sessions provided by NWDAF match the first session parameter information provided by NWDAF. If the first session matches the first session parameter information, it means that the terminal device It is an application that accesses the AF on the first session, and then the first communication device provides the address information of the first session to the NWDAF.
  • FIG. 4( d ) it is a schematic flowchart of another method for determining the address information of the first session used by the terminal device to access the application provided by the embodiment of the present application.
  • the method includes the following steps:
  • Step 401d to step 402d are the same as the above step 401c to step 402c, and reference may be made to the foregoing description.
  • step 403d the NWDAF sends a fifth request message (also referred to as request message 5) to the communication device.
  • the communication device receives the fifth request message.
  • the quantity of the communication equipment here can be one or more, and this communication equipment can be SMF or SM PCF.
  • the fifth request message includes network information or identification information of a session corresponding to the network information.
  • step 404d the communication device sends the address information of the session corresponding to the network information and the session parameter information of the session to the NWDAF.
  • NWDAF receives the address information of the session corresponding to the network information and the session parameter information of the session.
  • the communication device sends the address information of the session corresponding to the network information to the NWDAF, and sends the session parameter information of the session corresponding to the network information.
  • the communication device needs to obtain locally the identification information of the session corresponding to the network information according to the network information.
  • Step 405d NWDAF determines the address information of the first session from the address information of the session corresponding to the network information according to the session parameter information of the session corresponding to the network information and the first session parameter information, and the session parameter information of the first session is the first Session parameter information.
  • NWDAF sent the identification information of session 1 and session 2 to SMF1, and sent the identification information of session 3 to SMF2, and then NWDAF received the address information of session 1 and the session parameters of session 1 from SMF1 Information 1, address information of session 2 and session parameter information 2 of session 2, address information of session 3 and session parameter information 3 of session 3 are received from SMF2.
  • the NWDAF determines that the session parameter information 3 is the same as the first session parameter information received in step 401d, it determines that the terminal device uses the session 3 to access the application, that is, the session 3 is the first session. Thus, the NWDAF acquires the address information of the first session.
  • NWDAF judges whether there is a session matching the first session parameter information in the session corresponding to the network information. If the first session matches the first session parameter information, it means that the terminal device accesses AF on the first session application, and then the NWDAF can acquire the address information of the first session.
  • Fig. 4(e) is a schematic flow chart of a data collection method provided in the embodiment of the present application. The method includes the following steps:
  • step 401e the NWDAF determines to collect the data of the terminal device's access to the application.
  • This step is the same as the above-mentioned step 301, and reference may be made to the foregoing description.
  • This step 401e is an optional step.
  • step 402e the NWDAF sends a data subscription request message to the AF.
  • the AF receives the data subscription request message.
  • the data subscription request message includes identification information of the terminal device and an external application identification, and the identification information of the terminal device may be, for example, a generic public subscription identity (GPSI).
  • GPSI generic public subscription identity
  • the data subscription request message is used to request the terminal device to access the data of the application.
  • step 403e the AF sends a first request message (also referred to as request message 1) to the NEF.
  • the NEF receives the first request message.
  • the first request message includes identification information of the terminal device and an external application identification, and the first request message is used to query the address information of the session used by the terminal device to access the application corresponding to the external application identification.
  • the first request message may be an Nnef_UEid_Get_Request message.
  • step 404e the NEF acquires the address information of the first session used by the terminal device to access the application corresponding to the external application identifier.
  • the implementation method of NEF obtaining the address information of the first session used by the terminal device to access the application corresponding to the external application identifier is the same as the above-mentioned NWDAF obtaining the address information of the first session used by the terminal device to access the application corresponding to the external application identifier
  • the implementation method is similar, and for details, reference may be made to the embodiment corresponding to the foregoing FIG. 4(b), FIG. 4(c) or FIG. 4(d).
  • step 405e the NEF sends the address information of the first session to the AF.
  • the NEF sends a first response message to the AF, where the first response message includes address information of the first session.
  • the first response message may be a Nnef_UEid_Get_Response message.
  • step 406e the AF collects application data corresponding to the external application identifier of the terminal device according to the address information of the first session.
  • the AF collects the data of the application corresponding to the external application identifier of the terminal device. For example, the AF may send a request message to the terminal device to request the data of the application of the terminal device. Another example may be that the AF Record the data in the process of the terminal device accessing the application through the first session.
  • step 407e the AF sends to the NWDAF the data that the terminal device accesses the application through the first session.
  • the NWDAF receives the data that the terminal device accesses the application through the first session.
  • NWDAF can determine the service experience information and/or service flow of the terminal device accessing the application through the first session based on the data of the terminal device accessing the application through the first session characteristic information.
  • service experience information and service flow feature information For the content of the service experience information and service flow feature information, reference may be made to the description of step 311 above.
  • NEF can determine the address information of the session used by the terminal device to access the application, so that it only needs to provide the address information of the one session to the AF, and does not share the address information of all sessions of the terminal device that may access the application All are sent to the AF, which avoids exposing the session information of the terminal device that should not be perceived by the AF to the AF, and reduces security risks.
  • the session established by the terminal device is a PDU session as an example for description.
  • FIG. 5 is a schematic flow chart of a data collection method provided by an embodiment of the present application. The method includes the following steps:
  • Step 501 is the same as step 301 above.
  • This step 501 is an optional step.
  • step 502 the NWDAF acquires network information corresponding to the AF.
  • the NWDF may use any one of the two methods described in step 302 above to acquire the network information corresponding to the AF.
  • the third method can also use the following third method to obtain the network information corresponding to AF. Specifically, you can refer to the description of the following steps 702 to 704, and the third method is slightly different from the following steps 702 to 704:
  • the AM PCF obtains multiple RSDs that may be used by the terminal device access application, it does not need to combine the allowed slice information (that is, Allowed NSSAI) to further determine the actual value of the terminal device access application from the multiple RSDs.
  • RSDs used that is to say, through the third method, NWDAF can obtain multiple RSDs from AM PCF, and each RSD includes DNN, S-NSSAI, access type, SSC mode and PDU session type.
  • step 503 the NWDAF sends a subscription request message to the UDM.
  • the UDM receives the subscription request message.
  • the subscription request message includes identification information of the terminal device and one or more pieces of network information, and the subscription request message is used to subscribe to the SMF corresponding to the one or more pieces of network information.
  • the subscription request message also includes a subscription event, which is a UE context (UE context in SMF data) change event in SMF data.
  • a subscription event which is a UE context (UE context in SMF data) change event in SMF data.
  • the subscription request message may be a Nudm_SDM_Subscribe Request message.
  • step 504 the UDM sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message may be a Nudm_SDM_Subscribe Response message.
  • the subscription response message is used to notify that the subscription is successful.
  • step 505 the UDM sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the notification message may be a Nudm_SDM_Notify message.
  • the notification message includes address information of one or more SMFs and identification information of a PDU session corresponding to each SMF.
  • the specific implementation method for the UDM to obtain the address information of the SMF and the identification information of the PDU session corresponding to each SMF can refer to the description in the above step 304 .
  • this step 505 may be executed multiple times, that is, whenever there is a new registration of the SMF corresponding to the one or more network information to the UDM, the UDM A notification message will be sent to the NWDAF to send the address information of the newly registered SMF and the identification information of the PDU session corresponding to the SMF to the NWDAF.
  • step 506 the NWDAF sends a subscription request message to the SMF.
  • the SMF receives the subscription request message.
  • the subscription request message carries the identification information and condition information of the event identification terminal device, and also carries the network information or the identification information of the PDU session corresponding to the SMF.
  • the event identification is an address assignment event
  • the subscription request message is used to subscribe to the terminal device
  • the address information allocated by the PDU session, the address information can be IPv4 address, IPv6 prefix or Ethernet address, etc.
  • the condition information in the subscription request message is used to instruct the SMF to send the address information of the PDU session to the NWDAF when the condition information matches, in other words, if the condition information does not match, the address information of the PDU session will not be sent.
  • the NWDAF sends a subscription request message to each SMF respectively.
  • NWDAF receives the address information of SMF1, the identification information of PDU session 1 corresponding to SMF1 and the identification information of PDU session 2, the address information of SMF2, and the identification information of PDU session 3 corresponding to SMF2 in the above step 505, and the PDU Both the identification information of session 1 and the identification information of PDU session 2 correspond to network information 1, and the identification information of PDU session 3 corresponds to network information 2, then NWDAF sends a subscription request message to SMF1 based on the address information of SMF1, and the subscription request message carries The event identifier, the identifier information and the condition information of the terminal device, and also carry the network information 1 or carry the identifier information of the PDU session 1 and the identifier information of the PDU session 2.
  • NWDAF sends a subscription request message to SMF2 based on the address information of SMF2.
  • the subscription request message carries the event identifier, the identifier information and condition information of the terminal device, and also carries the identifier information of network information 2 or PDU session 3.
  • condition information includes application identification information and an application start event (App_Start Event).
  • App_Start Event an application start event
  • the condition information may also include one or more of the access type, SSC mode or PDU session type.
  • the subscription request message may be an Nsmf_EventExposure_Subscribe Request message.
  • step 507 the SMF sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message may be an Nsmf_EventExposure_Subscribe Response message.
  • the subscription response message is used to notify that the subscription is successful.
  • This step 507 is an optional step.
  • step 508 the SMF sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the SMF After receiving the above subscription request message, the SMF performs application event detection on the PDU session in the subscription request message according to the condition information in the subscription request message, or performs application event detection on the PDU session corresponding to the network information in the subscription request message. If an application start event corresponding to an application is detected in a certain PDU session, it is determined that the terminal device actually uses the PDU session to access the application in the AF.
  • SMF1 performs application start event detection on PDU session 1 and PDU session 2, for example, if an application start event corresponding to an application is detected in PDU session 1, then SMF1 determines that the terminal device actually uses the PDU session 1 Visit the app in AF. Since the terminal device will only use one PDU session to access the application, SMF1 will not detect the application start event corresponding to the application in PDU session 2, and similarly, SMF2 will not detect the application start event corresponding to the application in PDU session 3 .
  • the SMF If the SMF detects that an application start event corresponding to an application is detected in a certain PDU session, the SMF sends a notification message to the NWDAF, and the notification message carries the address information of the PDU session.
  • the PDU session is referred to as the first PDU session, and the first PDU session is the PDU session actually used by the terminal device to access the application.
  • the SMF performs the detection of the application start event on the PDU session. Specifically, the SMF instructs the UPF to perform the detection of the application start event on the PDU session, and then the UPF returns the detection result to the SMF.
  • condition information also includes one or more of the access type, SSC mode or PDU session type
  • the SMF first One or more of them, filter the multiple PDU sessions in the subscription request message, get the PDU session that matches one or more of the access type, SSC mode or PDU session type in the condition information, and then Detection of application start events is performed on these matching PDU sessions. In this way, the number of PDU sessions performing application start event detection can be reduced, helping to reduce overhead.
  • a PDU session matches one or more of the access type, SSC mode, or PDU session type in the condition information, and refers to one or more of the access type, SSC mode, or PDU session type of the PDU session.
  • the condition information includes the access type, SSC mode, and PDU session type of the PDU session. If the access type, SSC mode, and PDU session type of a PDU session and the access type, SSC mode, and If the PDU session types are the same, it means that the PDU session matches the access type, SSC mode and PDU session type in the condition information.
  • the condition information includes the access type of the PDU session and the PDU session type. If the access type and the PDU session type of a PDU session are the same as the access type and the PDU session type in the condition information, it means The PDU session matches the access type and the PDU session type in the condition information.
  • the notification message may be an Nsmf_EventExposure_Notify message.
  • step 509 the NWDAF sends a data subscription request message to the AF.
  • the AF receives the data subscription request message.
  • the data subscription request message carries the identification information of the application and the address information of the first PDU session, where the first PDU session refers to the address information of the PDU session actually used by the terminal device to access the application.
  • the data subscription request message is used to request to obtain the data of the first PDU session access application.
  • step 510 the AF sends a data subscription response message to the NWDAF.
  • the NWDAF receives the data subscription response message.
  • the data subscription response message is used to notify that the subscription is successful.
  • This step 510 is an optional step.
  • step 511 the AF sends a notification message to the NWDAF.
  • the NWDAF receives the notification message.
  • the AF can collect and count the service flow corresponding to the first PDU session based on the subroutine corresponding to the application, obtain the data of the terminal device accessing the application through the first PDU session, and send the terminal device through the first PDU session.
  • the data of the first PDU session access application is carried in the notification message and sent to the NWDAF.
  • the source address carried in the message sent by the terminal device to the AF service is the address information of the first PDU session.
  • Step 512 is the same as step 311 above.
  • This step 512 is an optional step.
  • NWDAF can collect data from the AF that the terminal device accesses an application in the AF, and analyze the collected data to obtain service experience information and/or service flow characteristic information of the terminal device accessing the application, Accurate analysis of application experience can be achieved.
  • NWDAF only provides the address information of one PDU session to the AF, that is, the address information of the PDU session actually used by the terminal device accessing the AF application, and avoids exposing the address information of the PDU session that is not related to the AF to the AF, that is, does not
  • the address information of the PDU session of the application that is not used by the terminal device to access the AF can reduce security risks. And since the amount of address information of the PDU session sent to the AF is reduced, overhead can be reduced.
  • FIG. 6 is a schematic flow chart of a data collection method provided by an embodiment of the present application. The method includes the following steps:
  • Step 601 to step 602 are the same as above step 501 to step 502.
  • This step 601 is an optional step.
  • step 603 the NWDAF sends a subscription request message to the BSF.
  • the BSF receives the subscription request message.
  • the subscription request message includes identification information of the terminal device and one or more network information, and the subscription request message is used to subscribe to the online notification of the SM PCF corresponding to the one or more network information.
  • the subscription request message also includes a subscription event
  • the subscription event is an SM PCF online event
  • the BSF receives the subscription event, if it is found that the SM PCF corresponding to the one or more network information is registered with the BSF , then send the address information of the SM PCF to NWDAF.
  • the information that SM PCF registers with BSF includes but not limited to: identification information of terminal equipment, network information, address information of SM PCF, identification information of SM PCF, optional, SM PCF registers to The BSF information also includes identification information of one or more PDU sessions.
  • the subscription request message may be a Nbsf_NFManagement_Subscribe Request message.
  • step 604 the BSF sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message may be a Nbsf_NFManagement_Subscribe Response message.
  • the subscription response message is used to notify that the subscription is successful.
  • step 605 the BSF sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the notification message may be an Nbsf_NFManagement_Notify message.
  • the notification message includes address information carrying one or more SM PCFs, and carrying identification information and/or network information of a PDU session corresponding to each SM PCF.
  • this step 605 may be executed multiple times, for example, each time when an SM PCF corresponding to the one or more network information is newly registered to the BSF, the BSF will send a notification message to the NWDAF to send the newly registered SM PCF.
  • the address information of the SM PCF and the identification information and/or network information of the PDU session corresponding to the SM PCF are sent to the NWDAF.
  • Step 606 NWDAF sends a subscription request message to SM PCF.
  • the SM PCF receives the SUBSCRIBE REQUEST message.
  • the subscription request message carries the event identifier, the identifier information and condition information of the terminal device, and carries the identifier information or network information of the PDU session.
  • This event is identified as an address allocation event, and the subscription request message is used to subscribe to the address information allocated for the PDU session of the terminal device.
  • the address information can be an IPv4 address, an IPv6 prefix, or an Ethernet address.
  • the condition information in the subscription request message is used to instruct the SM PCF to send the address information of the PDU session to the NWDAF when the condition information matches, in other words, if the condition information does not match, then the address information of the PDU session is not sent.
  • NWDAF receives address information of multiple SM PCFs in the above step 605, then NWDAF sends a subscription request message to each SM PCF respectively.
  • NWDAF receives the address information of SM PCF1, the identification information of PDU session 1 corresponding to SM PCF2 and the identification information of PDU session 2, the address information of SM PCF2, and the identification information of PDU session 3 corresponding to SM PCF2 in the above step 605 , then NWDAF sends a subscription request message to SM PCF1 based on the address information of SM PCF1.
  • the subscription request message carries event identifiers, terminal device identification information and condition information, and also carries network information 1 or identification information of PDU session 1 and Identification information of PDU session 2.
  • NWDAF sends a subscription request message to SM PCF2 based on the address information of SM PCF2.
  • the subscription request message carries event identifiers, terminal device identification information and condition information, and also carries network information 2 or PDU session 3 identification information
  • condition information includes application identification information and an application start event (App_Start Event).
  • step 607 the SM PCF sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message is used to notify that the subscription is successful.
  • This step 607 is an optional step.
  • step 608 the SM PCF sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the SM PCF After receiving the above subscription request message, the SM PCF performs application event detection on the PDU session in the subscription request message according to the condition information in the subscription request message, or performs application event detection on the PDU session corresponding to the network information in the subscription request message . If an application start event corresponding to an application is detected in a certain PDU session, it is determined that the terminal device actually uses the PDU session to access the application in the AF.
  • SM PCF1 performs application start event detection on PDU session 1 and PDU session 2.
  • This PDU session 1 accesses the application in AF. Since the terminal device will only use one PDU session to access the application, SM PCF 1 will not detect the application start event corresponding to the application in PDU session 2. Similarly, SM PCF2 will not detect the corresponding application start event in PDU session 3. Application start event.
  • the SM PCF detects that an application start event corresponding to an application is detected in a certain PDU session, the SM PCF sends a notification message to the NWDAF, and the notification message carries the address information of the PDU session.
  • the PDU session is referred to as the first PDU session, and the first PDU session is the PDU session actually used by the terminal device to access the application.
  • SM PCF carries out the detection of application start event to PDU session, specifically can be: SM PCF instructs SMF or UPF to PDU session execution application start event detection, then SMF or UPF returns detection result to SM PCF.
  • Step 609 to step 612 are the same as step 509 to step 512.
  • NWDAF can collect data from the AF that the terminal device accesses an application in the AF, and analyze the collected data to obtain service experience information and/or service flow characteristic information of the terminal device accessing the application, Accurate analysis of application experience can be achieved.
  • NWDAF only provides the address information of one PDU session to the AF, that is, the address information of the PDU session actually used by the terminal device accessing the AF application, and avoids exposing the address information of the PDU session that is not related to the AF to the AF, that is, does not
  • the address information of the PDU session of the application that is not used by the terminal device to access the AF can reduce security risks. And since the amount of address information of the PDU session sent to the AF is reduced, overhead can be reduced.
  • the NWDAF obtains the address information of the SM PCF from the BSF, and obtains the terminal device access information from the SM PCF.
  • the address information of the PDU session actually used by the application and in the above embodiment corresponding to Figure 5, NWDAF obtains the address information of the SMF from the UDM, and obtains the address information of the PDU session actually used by the terminal device to access the application from the SMF.
  • FIG. 7 is a schematic flowchart of a data collection method provided by an embodiment of the present application. The method includes the following steps:
  • Step 701 is the same as step 301 above.
  • This step 701 is an optional step.
  • step 702 the NWDAF acquires flow description information corresponding to the application.
  • the stream description information can be an application identifier (APP ID), triplet, FQDN or URL.
  • a network element that sends a subscription request to the NWDAF may provide the NWDAF with flow description information corresponding to the application.
  • Step 703 NWDAF sends a request message to AM PCF.
  • the AM PCF receives the request message.
  • the request message includes identification information and a flow descriptor of the terminal device.
  • the stream descriptor is determined according to the above stream description information, for example, the stream descriptor includes an application identifier, triplet, FQDN or URL.
  • the request message is used to request the terminal device to access the RSD of the application.
  • Step 704 AM PCF sends a response message to NWDAF.
  • the NWDAF receives the response message.
  • the AM PCF determines one or more user routing selection policies (UE routing selection policy, URSP) that the terminal device may use to access the application corresponding to the flow descriptor according to the identification information of the terminal device and the flow descriptor , each URSP includes the stream descriptor and one or more RSDs.
  • UE routing selection policy URSP
  • each RSD includes DNN, S-NSSAI, access type, SSC mode and PDU session type.
  • the request message in the above step 703 includes the identification information of the terminal device 1 and the flow descriptor 1, and the AM PCF determines the URSP that contains the flow descriptor 1 allocated to the terminal device 1, for example, the determined URSP includes URSP1 and URSP2, where URSP1 includes stream descriptor 1 and (RSD1, RSD2, RSD3), and URSP2 includes stream descriptor 1 and (RSD4, RSD5, RSD6, RSD7). Therefore, according to the identification information of the terminal device 1 and the flow descriptor 1, the AM PCF determines that the RSDs that the terminal device may use to access the application corresponding to the flow descriptor include RSD1, RSD2, RSD3, RSD4, RSD5, RSD6 and RSD7.
  • the AM PCF determines that the RSDs that the terminal device may use to access the application corresponding to the flow descriptor include RSD1, RSD2, RSD3, RSD4, RSD5, RSD6 and RSD7.
  • the AM PCF also combines the allowed access slice information of the terminal device (that is, Allowed NSSAI), and selects one RSD from the determined RSDs, and this RSD is the RSD actually used by the terminal device to access the application.
  • Allowed NSSAI includes S-NSSAI 2, S-NSSAI 3 and S-NSSAI 4, where S-NSSAI 2, S-NSSAI 3 and S-NSSAI 4 belong to RSD2, RSD3 and RSD4 respectively, and RSD2, RSD3 and RSD4
  • the priority of the priority decreases in turn, and the AM PCF determines that RSD2 is the RSD actually used by the terminal device to access the application.
  • the response message sent by AM PCF to NWDAF includes an RSD, which includes DNN, S-NSSAI, access type, SSC mode, and PDU session type.
  • RSD is the RSD actually used by the terminal device to access the application. The following will The RSD actually used by the terminal device to access the application is called the first RSD.
  • Step 705 NWDAF sends a subscription request message to UDM.
  • the UDM receives the subscription request message.
  • the subscription request message includes identification information of the terminal device and a piece of network information, and the subscription request message is used to subscribe to the online notification of the SMF corresponding to the network information, and the network information comes from the first RSD.
  • the subscription request message also includes a subscription event, which is a UE context (UE context in SMF data) change event in SMF data.
  • UE context UE context in SMF data
  • the subscription event if it finds that the network information corresponds to The SMF registered to the UDM sends the address information of the SMF to the NWDAF.
  • the subscription request message may be a Nudm_SDM_Subscribe Request message.
  • step 706 the UDM sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message may be a Nudm_SDM_Subscribe Response message.
  • the subscription response message is used to notify that the subscription is successful.
  • step 707 the UDM sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the notification message may be a Nudm_SDM_Notify message.
  • the notification message includes address information carrying an SMF.
  • step 708 the NWDAF sends a subscription request message to the SMF.
  • the SMF receives the subscription request message.
  • the subscription request message carries the event identifier and the identifier information of the terminal device, and the event identifier is an address assignment event.
  • the subscription request message is used to subscribe to the address information allocated for the PDU session of the terminal device, and the address information may be an IPv4 address, an IPv6 prefix, or an Ethernet address.
  • the subscription request message also includes condition information, which is used to instruct the SMF to send the address information of the PDU session to the NWDAF when the condition information matches, in other words, if the condition information does not match, the PDU is not sent Address information for the session.
  • the condition information includes one or more of access type, SSC mode, or PDU session type, and the access type, SSC mode, and PDU session type are all from the first RSD.
  • the subscription request message may be an Nsmf_EventExposure_Subscribe Request message.
  • step 709 the SMF sends a subscription response message to the NWDAF, and the NWDAF receives the subscription response message accordingly.
  • the subscription response message may be an Nsmf_EventExposure_Subscribe Response message.
  • the subscription response message is used to notify that the subscription is successful.
  • step 710 the SMF sends a notification message to the NWDAF, and the NWDAF receives the notification message accordingly.
  • the SMF obtains the address information of the PDU session corresponding to the terminal device according to the event identifier and the identification information of the terminal device after receiving the above subscription request message , and obtain one or more of the access type, SSC mode, or PDU session type corresponding to each PDU session, and carry the address information of the PDU session corresponding to the terminal device in the notification message, and the address information corresponding to each PDU session One or more of access type, SSC mode, or PDU session type.
  • NWDAF After NWDAF receives the notification message, it can correspond to each PDU session received in step 710 according to one or more of the access type, SSC mode or PDU session type in the first RSD received from step 704 above. Match one or more of the access type, SSC mode, or PDU session type.
  • step 710 receives the address information of 5 PDU sessions, and one or more of the access type, SSC mode, or PDU session type corresponding to each PDU session, wherein NWDAF determines the access type corresponding to PDU session 1
  • NWDAF determines the access type corresponding to PDU session 1
  • NWDAF determines that the address information of the PDU session 1 is
  • the terminal device accesses the address information of the PDU session actually used by the application.
  • the matched PDU session is called the first PDU session. Therefore, based on this implementation method, the notification message carries the address information of the PDU session corresponding to the terminal device, and one or more of the access type, SSC mode, or PDU session type corresponding to each PDU session.
  • the SMF obtains the PDU session corresponding to the terminal device according to the event identifier, terminal device identification information and condition information
  • the address information of the PDU session that matches the condition information, the PDU session is referred to as the first PDU session hereinafter.
  • the terminal device corresponds to 5 PDU sessions, and one or more of the access type, SSC mode or PDU session type corresponding to PDU session 1 is the same as the access type, SSC mode or PDU session type in the condition information. If one or more match respectively, the SMF obtains the address information of the PDU session 1, which is the address information of the PDU session actually used by the terminal device to access the application. Therefore, based on the implementation method, the notification message carries the address information of the first PDU session.
  • Step 711 to step 714 are the same as step 509 to step 512.
  • This step 714 is an optional step.
  • the AMF PCF may send the updated RSD to the NWDAF, the updated RSD
  • the RSD is the RSD used by the application that the terminal device currently accesses the AF. Then trigger re-execution of the above steps 705 to 714.
  • NWDAF can collect data from the AF that the terminal device accesses an application in the AF, and analyze the collected data to obtain service experience information and/or service flow characteristic information of the terminal device accessing the application, Accurate analysis of application experience can be achieved.
  • NWDAF only provides the address information of one PDU session to the AF, that is, the address information of the PDU session actually used by the terminal device accessing the AF application, and avoids exposing the address information of the PDU session that is not related to the AF to the AF, that is, does not
  • the address information of the PDU session of the application that is not used by the terminal device to access the AF can reduce security risks. And since the amount of address information of the PDU session sent to the AF is reduced, overhead can be reduced.
  • the data analysis network element and the communication device include hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 8 and FIG. 9 are schematic structural diagrams of possible communication devices provided by the embodiments of the present application. These communication devices can be used to implement the functions of the data analysis network element or the communication device in the above method embodiments, and thus can also realize the beneficial effects of the above method embodiments.
  • the communication device may be a data analysis network element or a communication device, or a module (such as a chip) applied to a data analysis network element or a communication device.
  • a communication device 800 includes a processing unit 810 and a transceiver unit 820 .
  • the communication device 800 is configured to implement the functions of the data analysis network element or the communication device in the foregoing method embodiments.
  • the communication device is used to realize the function of the data analysis network element in the above method embodiment
  • the processing unit 810 is used to determine the address information of the first session used by the terminal device to access the application
  • the transceiver unit 820 It is used to send a first request message to the application function network element providing the application, where the first request message includes the identification information of the application and the address information of the first session; the address information of the first session is used to collect the terminal device data of the application; and receiving the data of the application from the application function network element.
  • the processing unit 810 is further configured to determine to collect data on accessing the application by the terminal device.
  • the processing unit 810 is configured to determine the address information of the first session used by the terminal device to access the application, specifically including: obtaining network information corresponding to the application, the network information including the data network name and /or slice identification information; used to send a second request message to the communication device corresponding to the network information through the transceiver unit 820, the second request message includes the application identification information and an application start event, and the second request message also includes The network information or the identification information of the session corresponding to the network information; used for receiving the address information of the first session from the first communication device through the transceiver unit 820, and the first session is a session in the session corresponding to the network information.
  • a session in which an application start event of the application is detected, the first communication device is one of the communication devices corresponding to the network information.
  • the second request message further includes session parameter information, and the session parameter information is used to determine one or more sessions in the session corresponding to the network information, and the one or more sessions are applications to be executed Start a session for event detection.
  • the transceiving unit 820 is further configured to send a third request message to the mobility management policy control network element, where the third request message includes the identification information of the terminal device and the flow descriptor of the application; And receiving the session parameter information from the mobility management policy control network element, where the session parameter information corresponds to the flow descriptor information and the identification information of the terminal device.
  • the processing unit 810 is configured to determine the address information of the first session used by the terminal device to access the application, specifically including: obtaining the terminal device from the mobility management policy control network element through the transceiver unit 820
  • the routing descriptor used by the device to access the application includes network information and first session parameter information, and the network information includes data network name and/or slice identification information; used to send data to the network via the transceiver unit 820
  • the communication device corresponding to the information sends a fourth request message, the fourth request message includes the first session parameter information, and the fourth request also includes the network information or the identification information of the session corresponding to the network information; 820 Receive address information of the first session from the first communication device, where the first session is a session corresponding to the first session parameter information among the sessions corresponding to the network information, and the first communication device is the session corresponding to the network information One of the communication devices in the communication device.
  • the processing unit 810 is configured to determine the address information of the first session used by the terminal device to access the application, specifically including: obtaining the terminal device from the mobility management policy control network element through the transceiver unit 820
  • the routing descriptor used by the device to access the application, the routing descriptor includes network information and first session parameter information, and the network information includes data network name and/or slice identification information; used to send data to the network via the transceiver unit 820
  • the communication device corresponding to the information sends a fifth request message, where the fifth request message includes the identification information of the network information or the session corresponding to the network information; and is used for receiving the communication corresponding to the network information from the communication device through the transceiver unit 820
  • the address information of the session, and the session parameter information of the session corresponding to the network information used to determine from the address information of the session corresponding to the network information according to the session parameter information of the session corresponding to the network information and the first session parameter information
  • the processing unit 810 is further configured to acquire address information of the communication device and identification information of the session corresponding to the network information from a data management network element, where the communication device is a session management network element; Or, acquire the address information of the communication device and the identification information of the session corresponding to the network information from the binding support network element, where the communication device is a session management policy control network element.
  • the communication device is used to implement the functions of the communication device in the above method embodiments
  • the transceiver unit 820 is used to receive the second request message from the data analysis network element, the second request message includes the application The identification information and the application start event, the second request message also includes identification information of the network information or the session corresponding to the network information
  • the processing unit 810 is configured to detect the application on the first session in the session corresponding to the network information Application start event
  • the transceiving unit 820 is further configured to send address information of the first session to the data analysis network element, where the address information of the first session is used to collect data of the application of the terminal device.
  • the second request message also includes session parameter information; the processing unit 810 is further configured to determine one or more sessions corresponding to the session parameter information in the session corresponding to the network information; The one or more sessions perform detection of an application start event, the one or more sessions including the first session.
  • the communication device is used to implement the functions of the communication device in the above method embodiments
  • the transceiver unit 820 is used to receive the fourth request message from the data analysis network element, the fourth request message includes the first Session parameter information, the fourth request message also includes network information or the identification information of the session corresponding to the network information
  • the processing unit 810 is configured to obtain the address information of the first session, and the first session is in the session corresponding to the network information The session corresponding to the first session parameter information
  • the transceiver unit 820 is further configured to send the address information of the first session to the data analysis network element, and the address information of the first session is used by the terminal device to pass the first session Collection of data about access to the app.
  • processing unit 810 and the transceiver unit 820 can be directly obtained by referring to related descriptions in the above method embodiments, and details are not repeated here.
  • a communication device 900 includes a processor 910 and an interface circuit 920 .
  • the processor 910 and the interface circuit 920 are coupled to each other.
  • the interface circuit 920 may be a transceiver or an input-output interface.
  • the communication device 900 may further include a memory 930 for storing instructions executed by the processor 910 or storing input data required by the processor 910 to execute the instructions or storing data generated after the processor 910 executes the instructions.
  • the processor 910 is used to implement the functions of the processing unit 810
  • the interface circuit 920 is used to implement the functions of the transceiver unit 820 .
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in the base station or the terminal.
  • the processor and the storage medium may also exist in the base station or the terminal as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, a base station, user equipment or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • the computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a "division” Relationship.

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Abstract

La présente demande concerne un procédé de collecte de données, un appareil de communication et un système de communication. Le procédé consiste à : déterminer les informations d'adresse d'une première session, qui sont utilisées par un dispositif terminal pour accéder à une application ; envoyer un premier message de demande à un élément réseau de fonction d'application qui fournit l'application, le premier message de demande comprenant les informations d'identification de l'application et les informations d'adresse de la première session, et les informations d'adresse de la première session servant à collecter les données de l'application du dispositif terminal ; et recevoir les données de l'application de l'élément réseau à fonction d'application. Dans la solution, un élément réseau d'analyse de données peut déterminer des informations d'adresse d'une session, qui sont utilisées par un dispositif terminal pour accéder à une application. Il est nécessaire uniquement de fournir les informations d'adresse de ladite session à un élément réseau à fonction d'application, plutôt que d'envoyer, à l'élément réseau à fonction d'application, les informations d'adresse de toutes les sessions qui peuvent être utilisées par le dispositif terminal pour accéder à l'application, ce qui permet d'éviter que les informations d'une session du dispositif terminal, qui ne devraient pas être détectées par une AF, soient exposées à l'élément réseau à fonction d'application, et de réduire ainsi le risque pour la sécurité.
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