WO2021088566A1 - Nwdaf网元的选择方法、装置、电子设备及可读存储介质 - Google Patents

Nwdaf网元的选择方法、装置、电子设备及可读存储介质 Download PDF

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WO2021088566A1
WO2021088566A1 PCT/CN2020/118371 CN2020118371W WO2021088566A1 WO 2021088566 A1 WO2021088566 A1 WO 2021088566A1 CN 2020118371 W CN2020118371 W CN 2020118371W WO 2021088566 A1 WO2021088566 A1 WO 2021088566A1
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nwdaf
network element
service
data analysis
network
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PCT/CN2020/118371
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English (en)
French (fr)
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张卓筠
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腾讯科技（深圳）有限公司
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Priority to EP20885260.8A priority Critical patent/EP3989485B1/en
Publication of WO2021088566A1 publication Critical patent/WO2021088566A1/zh
Priority to US17/451,738 priority patent/US11716399B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/14—Network analysis or design
    • H04L41/142—Network analysis or design using statistical or mathematical methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/14—Network analysis or design
    • H04L41/147—Network analysis or design for predicting network behaviour
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/63—Routing a service request depending on the request content or context
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability

Definitions

  • This application relates to the field of communication technology. Specifically, this application relates to a method, device, electronic device, and readable storage medium for selecting NWDAF network elements.
  • NWDAF Network Data Analytics Function
  • NWDAF needs to collect data from which network functions, and which network functions the analysis results need to be sent to, and defines the specific implementation process for specific scenarios. Big data analysis network elements are not standardized.
  • an embodiment of the present application provides a method for selecting a network element of the network data analysis function NWDAF, which is executed by an electronic device, and includes:
  • the NWDAF service discovery response contains the performance parameter information of each NWDAF network element for the requested network data analysis service
  • each NWDAF network element for the requested network data analysis service select a target NWDAF network element for providing the requested network data analysis service, and send an NWDAF service request to the target NWDAF network element.
  • the embodiment of the present application provides a method for selecting a network element of the network data analysis function NWDAF, which is executed by an electronic device, and includes:
  • the NWDAF service discovery response is sent to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element, so that the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element is in the NWDAF service discovery response
  • each included NWDAF network element selects a target NWDAF network element for providing the requested network data analysis service, and sends an NWDAF service request to the target NWDAF network element.
  • an embodiment of the present application provides a device for selecting a NWDAF network element with a network data analysis function, including:
  • the service discovery request sending module is used to send the NWDAF service discovery request to the NRF network element of the network registration storage function;
  • the service discovery response receiving module is configured to receive the NWDAF service discovery response sent by the NRF network element based on the NWDAF service discovery request, where the NWDAF service discovery response contains the performance parameter information of each NWDAF network element for the requested network data analysis service;
  • the NWDAF network element selection module is used to select the target NWDAF network element for providing the requested network data analysis service according to the performance parameter information of each NWDAF network element for the requested network data analysis service, and send it to the target NWDAF network element NWDAF service request.
  • an embodiment of the present application provides a device for selecting NWDAF network elements with a network data analysis function, including:
  • the service discovery request receiving module is used to receive the NWDAF service discovery request sent by the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element;
  • the service discovery response sending module is used to send the NWDAF service discovery response to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element based on the NWDAF service discovery request, so that the NWDAF service request network element or the NWDAF service request network element corresponds to
  • the SCP entity selects the target NWDAF network element for providing the requested network data analysis service according to the performance parameter information of each NWDAF network element contained in the NWDAF service discovery response for the requested network data analysis service, and sends it to the target NWDAF network element Send NWDAF service request.
  • an embodiment of the present application provides an electronic device, including a memory and a processor
  • a computer program is stored in the memory
  • the processor is configured to execute a computer program to implement the method provided in any embodiment of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the Methods.
  • Figure 1 is a schematic diagram of data collection performed by NWDAF
  • Figure 2 is a schematic diagram of the opening of NWDAF's analysis data
  • FIG. 3 is a schematic flowchart of a method for selecting a NWDAF network element according to an embodiment of this application;
  • FIG. 4 is a schematic flowchart of a method for selecting a NWDAF network element in an example of an embodiment of the application
  • FIG. 5 is a schematic flowchart of a method for selecting NWDAF network elements according to an embodiment of this application.
  • FIG. 6 is a communication interaction diagram when direct communication is used for the selection method of NWDAF network elements in an embodiment of the application;
  • FIG. 7 is a communication interaction diagram when indirect communication is used for the selection method of NWDAF network elements in an embodiment of the application.
  • FIG. 8 is a structural block diagram of an NWDAF network element selection device provided by an embodiment of this application.
  • FIG. 9 is a structural block diagram of an NWDAF network element selection device provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of an electronic device provided by an embodiment of the application.
  • NWDAF Network Data Analytics Function, network data analysis function.
  • NF Network Function, network function.
  • NRF Network Repository Function network registration storage function.
  • AF Application Function, application function.
  • OAM Operation Administration and Maintenance, network management system.
  • SCP Service Communication Proxy, service communication proxy.
  • S-NSSAI Single Network Slice Selection Assistance Information, network slice identification.
  • Analytics ID The type identification of the network data analysis service.
  • NWDAF The architecture of NWDAF can be shown in Figures 1 and 2, where Figure 1 is a schematic diagram of NWDAF data collection, and Figure 2 is a schematic diagram of NWDAF analysis data (service analysis results) open.
  • NWDAF can collect specific data from specific NF (Network Function), OAM (Operation Administration and Maintenance, network management system), or AF (Application Function, application function), and analyze network elements through certain big data. Draw a certain analysis result, and send the result to a specific NF, OAM or AF as needed.
  • the Nnf interface can be called by NWDAF so that NWDAF can receive data from any NF.
  • Nnwdaf is a service-oriented interface provided by NWDAF network elements to the outside.
  • each network data analysis service of the same NWDAF network element can correspond to a specific NWDAF algorithm.
  • NWDAF network elements analyze the same network data analysis service (that is, the same scenario and demand), due to the The big data analysis algorithms used may be different and the training samples used may be different, so the corresponding processing time and the accuracy of the obtained analysis results are also quite different.
  • NWDAF network elements when different NWDAF network elements analyze the same network data analysis service, the performance of different NWDAF network elements (such as analysis time and accuracy of analysis results, etc.) are different.
  • NWDAF network element When it is necessary to select a NWDAF network element from NWDAF network elements to provide network data analysis services for the NWDAF service request network element, it is generally considered that the Analytics ID(s) contained in the service discovery request sent by the NWDAF service request network element, and possible
  • the included S-NSSAI and/or service area information is used to select the matching NWDAF network element to provide network data analysis services for the NWDAF service request network element, but the NWDAF network element selected by the above scheme can only guarantee that it can provide The NWDAF service requests network elements to provide network data analysis services, but cannot guarantee the performance of network data analysis.
  • FIG. 3 is a schematic flowchart of a method for selecting a NWDAF network element provided by an embodiment of the application. As shown in FIG. 3, the method is executed The subject may be the NWDAF service request network element located on the electronic device or the SCP entity corresponding to the NWDAF service request network element. For ease of description, in the following, the execution subject is collectively referred to as the NWDAF service requester. As shown in Fig. 3, the method may include the following steps.
  • Step S301 Send a NWDAF service discovery request to the NRF network element.
  • the NRF network element stores the profile information of the corresponding NWDAF network element in each NWDAF network element registered on it.
  • the profile information includes the network slice identifier (S- NSSAI), the type identification (Analytics ID(s)) of each supported network data analysis service, and the information of the service area in which it is located, as well as the information of the corresponding NWDAF network element for each supported network data analysis service Performance parameter information.
  • the network slice corresponding to the NWDAF network element can be determined according to the S-NSSAI corresponding to the NWDAF network element.
  • the Analytics ID(s) corresponding to the NWDAF network element the type of network data analysis service supported by the NWDAF network element can be determined. It is understandable that since each NWDAF network element can support one or more types of network data analysis services, each NWDAF network element corresponds to one or more Analytics ID, so it can be represented by "Analytics ID(s)" The type identification of the network data analysis service supported by the NWDAF network element.
  • the service area information of the NWDAF network element may be used to determine the service area of the NWDAF network element.
  • the service area information may be tracking area list information.
  • the performance parameter information of the NWDAF network element for different network data analysis services can be used to characterize the performance of the NWDAF network element for data analysis of different network data analysis services.
  • the NWDAF service discovery request includes NWDAF service discovery parameters
  • the NWDAF service discovery parameters include the type identification (Analytics ID) of the requested network data analysis service.
  • the NWDAF service discovery parameters also include It may include information such as the network slice identifier (S-NSSAI) of the network slice of the target NWDAF network element, and/or the service area information where the target NWDAF network element is located.
  • S-NSSAI network slice identifier
  • Step S302 Receive the NWDAF service discovery response sent by the NRF network element based on the NWDAF service discovery request, where the NWDAF service discovery response includes the performance parameter information of each NWDAF network element for the requested network data analysis service.
  • the NRF compares its stored profile information of each NWDAF network element with the NWDAF service discovery parameters in the received NWDAF service discovery request information, and compares the profile Each NWDAF network element whose information matches the discovery parameter is used as a candidate NWDAF network element for subsequent determination of the target NWDAF network element.
  • the above comparison process can be understood as a process in which the NRF network element performs preliminary screening of the NWDAF among the NRF network elements according to the discovery parameters, and obtains each candidate NWDAF network element.
  • the NRF network element sends the performance parameter information of each candidate NWDAF network element for the requested network data analysis service and the identification of each candidate NWDAF network element to the NWDAF service requester through the NWDAF service discovery response.
  • the NRF network element can store the performance parameters and corresponding identifiers of each candidate NWDAF network element in the NWDAF performance list in a one-to-one correspondence, and then send the NWDAF performance list to the NWDAF service requester .
  • the NRF network element directly sends the profile information of each candidate NWDAF network element to the NWDAF service requester through the NWDAF service discovery response. It is understandable that the profile information of the NWDAF network element includes the identification of the NWDAF network element in addition to the information mentioned above.
  • the profile information of the NWDAF network element matches the discovery parameter refers to the network data analysis service supported by the NWDAF network element It includes the network data analysis service requested by the NWDAF service requester, that is, the Analytics ID(s) corresponding to the NWDAF network element includes the Analytics ID corresponding to the network data analysis service requested by the NWDAF service requester.
  • the profile information of the NWDAF network element matches the discovery parameter means that, in addition to satisfying the NWDAF network element
  • the Analytics ID(s) corresponding to the element includes the Analytics ID corresponding to the network data analysis service requested by the NWDAF service requester, and also satisfies the S-NSSAI and service area information corresponding to the NWDAF network element, as well as the S-NSSAI and service area information corresponding to the NWDAF network element.
  • -NSSAI and service area information are the same.
  • Preliminary screening of NWDAF network elements in the above manner can ensure that each candidate NWDAF network element obtained can provide network data analysis services for the NWDAF service request network element.
  • Step S303 According to the performance parameter information of each NWDAF network element for the requested network data analysis service, select a target NWDAF network element for providing the requested network data analysis service, and send an NWDAF service request to the target NWDAF network element.
  • the performance parameters can characterize the performance of the NWDAF network element when performing data analysis on the requested network data analysis service. Therefore, the performance parameters can be used as the basis to select the target NWDAF network element.
  • the NWDAF service requester further determines the target NWDAF network element according to the performance parameter information in the NWDAF service discovery response. After the NWDAF service requester determines the target NWDAF network element, it can send an NWDAF service request to the target NWDAF network element.
  • the NWDAF service request includes the identification of the target NWDAF network element and the Analytics ID of the requested network data analysis service.
  • the target NWDAF network element sends an NWDAF service response to the NWDAF service requesting network element (or NWDAF service requester).
  • the NWDAF service response contains the target NWDAF network element’s analysis of the requested network data analysis service result.
  • Fig. 4 shows a schematic diagram of the principle of a method for selecting an NWDAF network element provided in this example.
  • the NWDAF service requester in this example is an NWDAF service requesting network element, specifically an NF network element.
  • NWDAF network elements can be understood as service producers (or providers), and NWDAF service request network elements can be understood as service consumers (or receivers). Therefore, the NF consumer in Figure 4 corresponds to this application
  • the execution process of the solution in this example can include the following steps:
  • Step 41 The NF consumer sends a NWDAF service discovery request to the NRF network element.
  • the NWDAF service discovery request contains the Analytics ID and other parameter information of the network data analysis service requested by the NF consumer;
  • Step 42 The NRF network element sends an NWDAF service discovery response to the NF consumer based on the NWDAF service discovery request.
  • the NWDAF service discovery response contains the information of each NWDAF network element that satisfies the parameter information in the service discovery request for the requested network data analysis service.
  • Performance parameter information the NF consumer determines the target NWDAF network element according to the performance parameter information corresponding to each NWDAF network element;
  • Step 43 The NF consumer sends an NWDAF service request to the target NWDAF network element.
  • the NWDAF service request contains the Analytics ID of the requested network data analysis service.
  • the target NWDAF network element After receiving the NWDAF service request, the target NWDAF network element sends the NWDAF service request network to the NWDAF service request network.
  • the element (that is, the NF consumer in FIG. 4) sends a NWDAF service response, and the NWDAF service response contains the analysis result of the requested network data analysis service by the target NWDAF network element.
  • the solution provided in the embodiment of this application can send the NWDAF service discovery request to the NRF network element before sending the NWDAF service request to the target NWDAF network element to obtain each NWDAF network that contains the parameter information that satisfies the service discovery request.
  • the most suitable target NWDAF network element can be selected based on the performance parameter information corresponding to each NWDAF network element, ensuring that the selected target NWDAF pair.
  • the performance parameter information includes the average prediction confidence of the service analysis result of the NWDAF network element for each network data analysis service
  • selecting the target NWDAF network element for providing the requested network data analysis service includes:
  • the NWDAF network element with the largest average prediction confidence for the requested network data analysis service is determined as the target NWDAF network element.
  • the performance parameter information is specifically the average prediction confidence of the analysis results of each network data analysis service, that is, the average prediction confidence of the service analysis results is used to characterize the analysis performance of the corresponding NWDAF network element for the network data analysis service. .
  • the prediction confidence refers to the probability that the true value appears within a certain range with the predicted value as the center.
  • the predicted confidence of each NWDAF network element for the service analysis result characterizes the reliability of the service analysis result predicted by each NWDAF network element.
  • the NWDAF service requester selects the target NWDAF network element according to the average prediction confidence of each candidate NWDAF network element for the requested network data analysis service, because the greater the average prediction confidence, the corresponding candidate The higher the accuracy of the NWDAF network element service analysis result, that is, the better the performance of the corresponding candidate NWDAF network element, the NWDAF network element with the highest average prediction confidence among the candidate NWDAF network elements can be determined It is the target NWDAF network element.
  • the average prediction confidence of the NWDAF network element for each network data analysis service is determined by the NWDAF network element in the following manner:
  • the corresponding big data analysis algorithm in the NWDAF network element is a data analysis algorithm based on machine learning
  • the accuracy of the analysis results of the same type of network data analysis service may change as the number of analysis increases.
  • the accuracy of the analysis result increases with the increase of the number of analysis.
  • each historical prediction confidence of the network data analysis service corresponding to the NWDAF network element is different.
  • each NWDAF network element After each NWDAF network element completes a network data analysis, it will give the prediction confidence of the analysis result at the same time, and count the prediction confidence corresponding to a certain number of network data analysis (that is, the historical prediction confidence). By averaging, the corresponding average prediction confidence of the NWDAF network element for the network data analysis service can be obtained.
  • the execution subject of the method is an NWDAF service request network element or an SCP entity corresponding to the NWDAF service request network element, and the NWDAF service request network element includes an NF network element, an AF network element or an OAM;
  • the NWDAF service request network element indirectly communicates with the NRF network element when the solution is executed.
  • Send NWDAF service discovery request to NRF network element including:
  • the NWDAF service discovery request is sent to the NRF network element.
  • the method further includes:
  • the NWDAF service request network element when the execution subject of the method is the NWDAF service request network element, the NWDAF service request network element directly communicates with the NRF network element when the solution is executed.
  • the execution subject is the SCP entity corresponding to the NWDAF service request network element
  • the corresponding SCP entity communicates with the NRF network element when the solution is executed
  • the NWDAF service request network element communicates with the corresponding SCP entity network element.
  • the SCP entity can be understood as a transit server.
  • the Analytics ID of the required network data analysis service comes from the NWDAF service request network element, and the determined target NWDAF network element provides analysis The result will also be finally sent to the NWDAF service request network element for its use.
  • the SCP entity communicates with the NWDAF service request network element.
  • the SCP entity first receives the NWDAF service request sent by the NWDAF service request network element.
  • the request contains the Analytics ID of the requested network data analysis service.
  • the request will also include the S-NSSAI and service area information of the NWDAF network element to be selected.
  • the SCP entity as the execution subject, communicates with the NRF network element in the manner described above, and determines the target NWDAF network element.
  • the NWDAF service discovery request sent to the NRF network element contains the In the NWDAF service discovery parameter, the S-NSSAI and service area information contained are the information of the NWDAF to be selected, which corresponds to the S-NSSAI and service area information contained in the service request sent by the NWDAF service request network element.
  • the Analytics ID included in the NWDAF service discovery parameter is also the Analytics ID included in the service request sent by the corresponding NWDAF service request network element.
  • the SCP entity communicates with the target NWDAF network element to obtain the analysis result provided by the corresponding target NWDAF network element for the network data analysis service, and sends the analysis result to the NWDAF service request network element.
  • the NWDAF service request sent by the NWDAF service request network element to the SCP entity and the NWDAF service request sent by the SCP entity to the NWDAF network element contain different information.
  • the former includes the type identification of the requested network data analysis service.
  • the former also includes the S-NSSAI and service area information of the NWDAF network element that needs to be selected. The latter only contains the identification of the requested network data analysis service, and does not contain S-NSSAI and service area information.
  • the NWDAF service discovery response also includes the effective duration of the service analysis result of each NWDAF network element for the requested network data analysis service;
  • the method may further include:
  • the target NWDAF network element corresponding to the next NWDAF service request is selected.
  • the NWDAF service request network element may request the same network data analysis service multiple times; in the case of indirect communication, among multiple NWDAF service request network elements corresponding to the same SCP entity, One NWDAF service request network element may request the same network data analysis service as another NWDAF service request network element.
  • the NWDAF service request network element or SCP entity needs to repeatedly communicate with the NRF network element to obtain the corresponding performance parameters of each NWDAF.
  • the NWDAF service discovery response in the preset time period after the service of the NWDAF service discovery response is sent by the NRF network element (that is, the time difference between the initiation time of the next NWDAF service request and the reception of the NWDAF discovery response is not greater than the effective time period), the NWDAF service discovery
  • the performance parameter information in the response remains valid for the same network data analysis service, that is, the performance parameter information in the NWDAF service discovery response can be used as the target NWDAF network element selected for the same network data analysis service in the preset time period. According to this, there is no need to repeatedly communicate with the NRF network element, and the operation efficiency is improved.
  • the target NWDAF network element corresponding to the next NWDAF service request is determined, including :
  • the NWDAF service update notification sent by the NRF network element is not received, based on the performance parameter information of each NWDAF network element for the requested network data analysis service contained in the NWDAF service discovery response, it is determined that the next NWDAF service request corresponds to The target NWDAF network element; where the NWDAF service update notification includes the identification of the NWDAF network element whose performance parameter has changed, and the updated value of the NWDAF network element whose performance parameter has changed for the performance parameter information of the requested network data analysis service ;
  • NWDAF service update notification sent by the NRF network element is received, based on the updated value of the performance parameter information of the requested network data analysis service by the NWDAF network element, determine the target NWDAF network element corresponding to the next NWDAF service request .
  • the performance parameter information in the NWDAF service discovery response remains valid for the same network data analysis service in the preset time period after the service of the NWDAF service discovery response is sent from the NRF network element.
  • the preset time period after the NWDAF service discovery response is issued if there is any change in the performance parameter information of any NWDAF network element for the requested network data analysis service, in order to ensure the validity of the performance parameter information, any NWDAF network element The changed performance parameter information of the network data analysis service will be sent to the NRF network element.
  • the NRF network element will save the changed information sent by the NWDAF, and send the changed performance parameter information corresponding to the NWDAF network element to the NWDAF service request network that has received the performance parameter information of the NWDAF network element through the NWDAF service update notification Meta or SCP entity.
  • each NWDAF network element is Analyze the performance parameter information of the network data of the service, and determine the target NWDAF network element corresponding to the next NWDAF service request. If the NWDAF service update notification for any NWDAF network element is received, it is considered that the performance parameter information of the NWDAF network element for the requested network data analysis service has changed.
  • the included performance parameter information of the NWDAF network element determines the target NWDAF network element corresponding to the next NWDAF service request based on the updated performance parameter information of each NWDAF network element for the requested network data analysis service.
  • the NWDAF service request network element or SCP entity needs to send the NWDAF service discovery request to the NRF network element again, and According to the performance parameter information corresponding to each NWDAF network element in the NWDAF service discovery response sent by the NRF network element, the target NWDAF network element for providing the requested network data analysis service is determined.
  • FIG. 5 is a schematic flowchart of a method for selecting NWDAF network elements according to an embodiment of the application.
  • the execution subject of the method may be an NRF network element located on an electronic device, and the method may include the following steps.
  • Step S501 Receive the NWDAF service discovery request sent by the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element.
  • the NRF network element stores the profile information of the corresponding NWDAF network element in each NWDAF network element registered on it.
  • the profile information includes the network slice identifier (S- NSSAI), the type identification (Analytics ID(s)) of each supported network data analysis service, and the information of the service area in which it is located, as well as the information of the corresponding NWDAF network element for each supported network data analysis service Performance parameter information.
  • the network slice corresponding to the NWDAF network element can be determined according to the S-NSSAI corresponding to the NWDAF network element.
  • the Analytics ID(s) corresponding to the NWDAF network element the type of network data analysis service supported by the NWDAF network element can be determined. It is understandable that since each NWDAF network element can support one or more types of network data analysis services, each NWDAF network element corresponds to one or more Analytics ID, so it can be represented by "Analytics ID(s)" The type identification of the network data analysis service supported by the NWDAF network element.
  • the service area information of the NWDAF network element may be used to determine the service area of the NWDAF network element.
  • the service area information may be tracking area list information.
  • the performance parameter information of the NWDAF network element for different network data analysis services can be used to characterize the performance of the NWDAF network element for data analysis of different network data analysis services.
  • the NWDAF service discovery request includes NWDAF service discovery parameters
  • the NWDAF service discovery parameters include the type identification (Analytics ID) of the requested network data analysis service.
  • the NWDAF service discovery parameters also include It may include information such as the network slice identifier (S-NSSAI) of the network slice of the target NWDAF network element, and/or the service area information where the target NWDAF network element is located.
  • S-NSSAI network slice identifier
  • Step S502 Send a NWDAF service discovery response to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element based on the NWDAF service discovery request, so that the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element can serve according to the NWDAF service request network element.
  • Discover the performance parameter information of each NWDAF network element contained in the response for the requested network data analysis service select the target NWDAF network element for providing the requested network data analysis service, and send the NWDAF service request to the target NWDAF network element .
  • the NRF compares its stored profile information of each NWDAF network element with the NWDAF service discovery parameters in the received NWDAF service discovery request information, and compares the profile Each NWDAF network element whose information matches the discovery parameter is used as a candidate NWDAF network element for subsequent determination of the target NWDAF network element.
  • the above comparison process can be understood as a process in which the NRF network element performs preliminary screening of the NWDAF among the NRF network elements according to the discovery parameters, and obtains each candidate NWDAF network element.
  • the NRF network element sends the performance parameter information of each candidate NWDAF network element for the requested network data analysis service and the identification of each candidate NWDAF network element to the NWDAF service requester through the NWDAF service discovery response.
  • the NRF network element can store the performance parameters and corresponding identifiers of each candidate NWDAF network element in the NWDAF performance list in a one-to-one correspondence, and then send the NWDAF performance list to the NWDAF service requester .
  • the NRF network element directly sends the profile information of each candidate NWDAF network element to the NWDAF service requester through the NWDAF service discovery response. It is understandable that the profile information of the NWDAF network element includes the identification of the NWDAF network element in addition to the information mentioned above.
  • the profile information of the NWDAF network element matches the discovery parameter refers to the network data analysis service supported by the NWDAF network element It includes the network data analysis service requested by the NWDAF service requester, that is, the Analytics ID(s) corresponding to the NWDAF network element includes the Analytics ID corresponding to the network data analysis service requested by the NWDAF service requester.
  • the profile information of the NWDAF network element matches the discovery parameter means that, in addition to satisfying the NWDAF network element
  • the Analytics ID(s) corresponding to the element includes the Analytics ID corresponding to the network data analysis service requested by the NWDAF service requester, and also satisfies the S-NSSAI and service area information corresponding to the NWDAF network element, as well as the S-NSSAI and service area information corresponding to the NWDAF network element.
  • -NSSAI and service area information are the same.
  • Preliminary screening of NWDAF network elements in the above manner can ensure that each candidate NWDAF network element obtained can provide network data analysis services for the NWDAF service request network element.
  • the performance parameters can characterize the performance of the NWDAF network element when performing data analysis on the requested network data analysis service. Therefore, the performance parameters can be used as the basis to select the target NWDAF network element.
  • the NWDAF service requester further determines the target NWDAF network element according to the performance parameter information in the NWDAF service discovery response. After the NWDAF service requester determines the target NWDAF network element, it can send an NWDAF service request to the target NWDAF network element.
  • the NWDAF service request includes the identification of the target NWDAF network element and the Analytics ID of the requested network data analysis service.
  • the target NWDAF network element sends an NWDAF service response to the NWDAF service requesting network element (or NWDAF service requester).
  • the NWDAF service response contains the target NWDAF network element’s analysis of the requested network data analysis service result.
  • the solution provided in the embodiment of this application can send the NWDAF service discovery request to the NRF network element before sending the NWDAF service request to the target NWDAF network element to obtain each NWDAF network that contains the parameter information that satisfies the service discovery request.
  • the most suitable target NWDAF network element can be selected based on the performance parameter information corresponding to each NWDAF network element, ensuring that the selected target NWDAF pair.
  • the method is executed by the network registration storage function NRF network element, and the NRF network element signs the performance parameter notification information of each NWDAF network element.
  • the method may further include the following steps:
  • Receive performance parameter notification information sent by each NWDAF network element contains the performance parameter information of each NWDAF network element supported by each NWDAF network element for each network data analysis service;
  • the NWDAF service request network element (NF network element, AF network element or OAM, etc.) can also directly configure the profile information of each NWDAF and sign the performance parameters of each NWDAF network element. Notify the information, without the request and response process of service discovery through the NRF network element. Then, the NWDAF service request network element can directly obtain the update notification of each NWDAF network element supported by each NWDAF network element for the performance parameter information of each network data analysis service, and replace the previously saved parameter information, and then determine according to the method described above Target NWDAF network element.
  • the NRF network element signs the performance parameter change notification information of the NWDAF network element, and the method further includes the following steps:
  • the corresponding stored performance parameter information of the NWDAF network element for the corresponding network data analysis service is updated.
  • the performance parameter change notification information includes the identification of the NWDAF network element, the Analytics ID(s) of the supported network data analysis service, and the performance parameter information for each network data analysis service.
  • the NRF network element subscribes to the NWDAF performance parameter information change notification information.
  • the NWDAF network element will change the identification of each NWDAF and the supported network data
  • the Analytics ID of the analysis service and the performance parameter information for each network data analysis service are sent to the NRF network element for updating the corresponding information in the NRF network element.
  • the performance parameter information includes the average prediction confidence of the service analysis result of the NWDAF network element for each network data analysis service
  • the target NWDAF network element is the NWDAF network element with the largest average prediction confidence for the requested network data analysis service among the NWDAF network elements included in the NWDAF service discovery response.
  • the performance parameter information is specifically the average prediction confidence of the data analysis results for each network data analysis service, that is, the average prediction confidence of the data analysis results is used to characterize the analysis performance of the corresponding NWDAF network element for the network data analysis service. Pros and cons.
  • the prediction confidence refers to the probability that the true value appears within a certain range with the predicted value as the center.
  • the prediction confidence of each NWDAF network element for the data analysis result of each network data analysis service characterizes the reliability of the data analysis result predicted by each NWDAF network element for each network data analysis service.
  • the NWDAF service requester selects the target NWDAF network element according to the average prediction confidence of each candidate NWDAF network element corresponding to the requested network data analysis service, because the greater the average prediction confidence, the corresponding backup
  • the NWDAF network element with the largest average prediction confidence corresponding to the requested network data analysis service may be determined as the target NWDAF network element.
  • the NWDAF service discovery response also includes the effective duration of the service analysis result of each NWDAF network element for the requested network data analysis service;
  • the method further includes:
  • the NWDAF service update notification is sent to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element.
  • the NWDAF service update notification includes the identification of the NWDAF network element that has changed performance parameters, and the NWDAF network element that has changed performance parameters responds to the requested The updated value of the performance parameter information of the network data analysis service.
  • the performance parameter information in the NWDAF service discovery response is valid for the same network data analysis service in the preset time period of the NWDAF service discovery response sent from the NRF network element, but the NWDAF is sent from the NRF network element In the preset time period after the service discovery response service, if there is a change in the performance parameter information of the NWDAF network element for the network data analysis service, in order to ensure the effectiveness and accuracy of the performance parameter information, any NWDAF network element will change the The performance parameter information of the network element is sent to the NRF network element, and the NRF network element will send the changed performance parameter information corresponding to the NWDAF network element to the NWDAF service requester through the NWDAF service update notification.
  • the execution subject of this method is the NF consumer (ie, the NWDAF service request network element in the preceding paragraph).
  • the entire business process involves the NWDAF network element end, the NRF network element end, and NF consumer side.
  • the service interaction process of the NWDAF network element may include the following steps:
  • Step 60 The NRF network element signs the NWDAF network element's performance parameter information change notification.
  • the NWDAF network element sends the changed performance parameters to the NRF network yuan;
  • Step 61 The NF consumer sends a NWDAF service discovery request to the NRF network element.
  • the NWDAF service discovery parameters included in the NWDAF service discovery request include the Analytics ID of the requested network data analysis service. In the embodiment of this application, it will also Contains information such as the S-NSSAI corresponding to the NWDAF network element that needs to be selected, and/or service area information;
  • Step 62 The NRF network element sends an NWDAF service discovery response to the NF consumer based on the NWDAF service discovery request, and the NWDAF service discovery response includes the performance parameter information of each NWDAF network element for the requested network data analysis service;
  • Step 63 The NF consumer selects the target NWDAF network element according to the performance parameter information of each NWDAF network element for the requested network data analysis service, and sends a NWDAF service request to the target NWDAF network element, and the NWDAF service request contains the requested NWDAF service request.
  • the execution subject of this method is the SCP entity corresponding to the NF consumer.
  • the entire business process involves the NWDAF network element end, the NRF network element end, the SCP entity end and the NF consumption ⁇ .
  • the service interaction process of the NWDAF network element may include the following steps:
  • Step 70 The NRF network element signs the NWDAF network element's performance parameter information change notification.
  • the NWDAF network element sends the changed performance parameters to the NRF network yuan;
  • Step 71 The NF consumer sends a NWDAF service request to the SCP entity.
  • the NWDAF service request includes the identification of the requested network data analysis service. In the embodiment of this application, it also includes the S-NSSAI of the NWDAF network element to be selected. And service area information;
  • Step 72 The SCP entity sends a NWDAF service discovery request to the NRF network element.
  • the NWDAF service discovery parameters included in the NWDAF service discovery request include the Analytics ID of the network data analysis service requested by the NF consumer and the NWDAF network to be selected. Meta S-NSSAI and service area information and other information;
  • Step 73 The NRF network element sends a NWDAF service discovery response to the SCP entity based on the NWDAF service discovery request, and the NWDAF service discovery response includes the performance parameter information of each NWDAF network element for the requested network data analysis service;
  • Step 74 The SCP entity selects the target NWDAF network element according to the performance parameter information of each NWDAF network element for the requested network data analysis service contained in the service discovery response, and sends the NWDAF service request to the target NWDAF network element.
  • the NWDAF service request Contains the identification of the requested network data analysis service;
  • Step 75 The target NWDAF network element sends a NWDAF service response to the SCP entity based on the NWDAF service request, and the NWDAF service response contains the analysis result of the target NWDAF network element on the requested network data analysis service;
  • Step 76 The SCP entity sends the received NWDAF service response to the NF consumer.
  • FIG. 8 is a structural block diagram of a device for selecting NWDAF network elements according to an embodiment of the application.
  • the device 800 may include: a service discovery request sending module 801, a service discovery response receiving module 802, and an NWDAF network element Select module 803, where:
  • the service discovery request sending module 801 is configured to send an NWDAF service discovery request to the network element of the network registration storage function NRF;
  • the service discovery response receiving module 802 is configured to receive the NWDAF service discovery response sent by the NRF network element based on the NWDAF service discovery request, where the NWDAF service discovery response includes the performance parameter information of each NWDAF network element for the requested network data analysis service;
  • the NWDAF network element selection module 803 is used to select the target NWDAF network element for providing the requested network data analysis service according to the performance parameter information of each NWDAF network element for the requested network data analysis service, and send it to the target NWDAF network element NWDAF service request.
  • the solution provided in the embodiments of the present application before sending the NWDAF service request to the NWDAF network element, can send the NWDAF service discovery request to the NRF network element to obtain each NWDAF network element that contains the parameter information that satisfies the service discovery request.
  • the NWDAF service discovery response for the performance parameter information of the requested network data analysis service so that the most suitable target NWDAF network element can be selected based on the performance parameter information corresponding to each NWDAF network element, and the selected target NWDAF network element can be guaranteed
  • the performance of analyzing and processing the requested network data analysis service provides the basis for obtaining the best NWDAF results.
  • the performance parameter information includes the average prediction confidence of the service analysis result of the NWDAF network element for each network data analysis service
  • the NWDAF network element selection module 803 is specifically used for:
  • the NWDAF network element with the largest average prediction confidence for the requested network data analysis service is determined as the target NWDAF network element.
  • the device further includes an average prediction confidence determination module, configured to:
  • the execution subject of the method corresponding to the device is the NWDAF service request network element located on the electronic device or the service communication agent SCP entity corresponding to the NWDAF service request network element, and the NWDAF service request network element includes the network function NF network element, application function AF network element or network management system OAM;
  • the service discovery request sending module 801 is specifically configured to:
  • the device may also include a service response forwarding module, which is used to:
  • the NWDAF service discovery response also includes the effective duration of each NWDAF network element's service analysis result for the requested network data analysis service; the device also includes a next target NWDAF network element selection module for :
  • each NWDAF network element selects the target NWDAF network element corresponding to the next NWDAF service request.
  • next target NWDAF network element selection module is specifically used for:
  • the NWDAF service update notification sent by the NRF network element is not received, based on the performance parameter information of each NWDAF network element for the requested network data analysis service contained in the NWDAF discovery response, determine the next NWDAF service request corresponding to The target NWDAF network element; where the NWDAF service update notification includes the identification of the NWDAF network element whose performance parameter has changed, and the updated value of the performance parameter information of the NWDAF network element whose performance parameter has changed for the requested network data analysis service;
  • the NWDAF service update notification sent by the NRF network element is received, based on the updated value of the performance parameter information of the requested network data analysis service for the NWDAF network element whose performance parameter included in the NWDAF service update notification has changed, Select the target NWDAF network element corresponding to the next NWDAF service request.
  • Fig. 9 is a structural block diagram of a device for selecting an NWDAF network element according to an embodiment of the application.
  • the device 900 may include: a service discovery request receiving module 901 and a service discovery response sending module 902, in which:
  • the service discovery request receiving module 901 is configured to receive the NWDAF service discovery request sent by the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element;
  • the service discovery response sending module 902 is configured to send an NWDAF service discovery response to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element based on the NWDAF service discovery request, so that the NWDAF service request network element or the NWDAF service request network element corresponds to
  • the SCP entity selects the target NWDAF network element for providing the requested network data analysis service according to the performance parameter information of each NWDAF network element contained in the NWDAF service discovery response for the requested network data analysis service, and sends it to the target NWDAF network element. Yuan sends NWDAF service request.
  • the solution provided in the embodiments of the present application before sending the NWDAF service request to the NWDAF network element, can send the NWDAF service discovery request to the NRF network element to obtain each NWDAF network element that contains the parameter information that satisfies the service discovery request.
  • the NWDAF service discovery response for the performance parameter information of the requested network data analysis service so that the most suitable target NWDAF network element can be selected based on the performance parameter information corresponding to each NWDAF network element, and the selected target NWDAF network element can be guaranteed
  • the performance of analyzing and processing the requested network data analysis service provides the basis for obtaining the best NWDAF results.
  • the method corresponding to the device is executed by the network registration storage function NRF network element located on the electronic device.
  • the NRF network element signs the performance parameter notification information of each NWDAF network element.
  • the device may also include a storage module, Used for:
  • Receive performance parameter notification information sent by each NWDAF network element contains the performance parameter information of each NWDAF network element supported by each NWDAF network element for each network data analysis service;
  • the NRF network element signs the performance parameter change notification information of each NWDAF network element
  • the device may further include an update module for:
  • the corresponding stored performance parameter information of the NWDAF network element for the corresponding network data analysis service is updated.
  • the performance parameter information includes the average prediction confidence of the service analysis result of the NWDAF network element for each network data analysis service
  • the target NWDAF network element is the NWDAF network element with the largest average prediction confidence for the requested network data analysis service among the NWDAF network elements included in the NWDAF service discovery response.
  • the NWDAF service discovery response also includes the effective duration of the service analysis result of each NWDAF network element for the requested network data analysis service;
  • the device also includes a service update notification sending module for:
  • the performance parameter change notification information is received at the time when the time difference between the sending time of the NWDAF service discovery response and the NWDAF service discovery response is less than the effective duration, and the received performance parameter change notification information includes at least one NWDAF network element included in the NWDAF service discovery response.
  • the performance parameter information of the requested network data analysis service, the NWDAF service update notification is sent to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element, the NWDAF service update notification includes the identification of the NWDAF network element whose performance parameters have changed, and The updated value of the performance parameter information of the requested network data analysis service for the NWDAF network element whose performance parameter has changed.
  • an embodiment of the present application also provides an electronic device.
  • the electronic device includes a memory, a processor, and a computer program stored in the memory and running on the processor.
  • the processor executes the computer program.
  • the method provided in any embodiment of the present application can specifically implement the following situations:
  • Case 1 Send a NWDAF service discovery request to the network registration storage function NRF network element; receive the NWDAF service discovery response sent by the NRF network element based on the NWDAF service discovery request, where the NWDAF service discovery response includes each NWDAF network element’s request for the network Performance parameter information of the data analysis service; according to the performance parameter information of each NWDAF network element for the requested network data analysis service, select the target NWDAF network element for providing the requested network data analysis service, and send it to the target NWDAF network element Send NWDAF service request.
  • Case 2 Receive the NWDAF service discovery request sent by the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element; send the NWDAF service to the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element based on the NWDAF service discovery request Discovery response, so that the NWDAF service request network element or the SCP entity corresponding to the NWDAF service request network element determines the performance parameter information of each NWDAF network element for the requested network data analysis service contained in the NWDAF service discovery response to determine to provide
  • the requested network data analyzes the target NWDAF network element of the service, and sends an NWDAF service request to the target NWDAF network element.
  • the embodiment of the present application provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the program is executed by a processor, the method shown in any embodiment of the present application is implemented.
  • the computer program corresponding to the selection method of the NWDAF network element is stored in the medium.
  • FIG. 10 shows a schematic structural diagram of an electronic device to which an embodiment of the present application is applicable.
  • the electronic device 1000 includes a processor 1001 and a memory 1003. Wherein, the processor 1001 and the memory 1003 are connected, for example, connected through a bus 1002. Further, the electronic device 1000 may further include a transceiver 1004, and the electronic device 1000 may interact with other electronic devices through the transceiver 1004 for data. It should be noted that in actual applications, the transceiver 1004 is not limited to one, and the structure of the electronic device 1000 does not constitute a limitation to the embodiment of the present application.
  • the processor 1001 is applied in the embodiment of the present application, and can be used to implement the functions of the service discovery request sending module 801, the service discovery response receiving module 802, and the NWDAF network element selection module 803 shown in FIG. 9 shows the functions of the service discovery request receiving module 901 and the service discovery response sending module 902.
  • the processor 1001 may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor 1001 may also be a combination that implements computing functions, for example, includes one or more microprocessor combinations, DSP and microprocessor combinations, and the like.
  • the bus 1002 may include a path for transferring information between the above-mentioned components.
  • the bus 1002 may be a PCI bus, an EISA bus, or the like.
  • the bus 1002 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the memory 1003 can be ROM or other types of static storage devices that can store static information and instructions, RAM or other types of dynamic storage devices that can store information and instructions, or it can be EEPROM, CD-ROM or other optical disk storage, or optical disk storage. (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory 1003 is used to store application program codes for executing the solutions of the present application, and is controlled by the processor 1001 to execute.
  • the processor 1001 is configured to execute application program codes stored in the memory 1003 to implement the actions of the NWDAF network element selection device provided in the embodiment shown in FIG. 8 or FIG. 9.

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Abstract

本申请提供了一种NWDAF网元的选择方法、装置、电子设备及可读存储介质，该方法包括：向网络注册存储功能NRF网元发送NWDAF服务发现请求；接收NRF网元基于NWDAF服务发现请求发送的NWDAF服务发现响应，根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。

Description

NWDAF网元的选择方法、装置、电子设备及可读存储介质
本申请要求于2019年11月6日提交国家知识产权局、申请号为201911078276.0、申请名称为“NWDAF网元的选择方法、装置、电子设备及可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，具体而言，本申请涉及NWDAF网元的选择方法、装置、电子设备及可读存储介质。
背景技术
在3GPP R16的eNA(Study of Enablers for Network Automation for 5G)课题中，提出了NWDAF(Network Data Analytics Function，网络数据分析功能)的概念。NWDAF是实现网络智能化非常关键的网络功能。
在R16的eNA课题中，提出了针对不同的场景，NWDAF需要从哪些网络功能收集数据，以及分析结果需要发送给哪些网络功能使用，并定义了针对特定的场景的具体实现流程，而对NWDAF的大数据分析网元不进行标准化。
发明内容
第一方面，本申请实施例提供了一种网络数据分析功能NWDAF网元的选择方法，由电子设备执行，包括：
向网络注册存储功能NRF网元发送NWDAF服务发现请求；
接收NRF网元基于NWDAF服务发现请求发送的NWDAF服务发现响应，其中，NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并 向目标NWDAF网元发送NWDAF业务请求。
第二方面，本申请实施例提供了一种网络数据分析功能NWDAF网元的选择方法，由电子设备执行，包括：
接收NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送的NWDAF服务发现请求；
基于NWDAF服务发现请求向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体根据NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
第三方面，本申请实施例提供了一种网络数据分析功能NWDAF网元的选择装置，包括：
服务发现请求发送模块，用于向网络注册存储功能NRF网元发送NWDAF服务发现请求；
服务发现响应接收模块，用于接收NRF网元基于NWDAF服务发现请求发送的NWDAF服务发现响应，其中，NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
NWDAF网元选择模块，用于根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
第四方面，本申请实施例提供了一种网络数据分析功能NWDAF网元的选择装置，包括：
服务发现请求接收模块，用于接收NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送的NWDAF服务发现请求；
服务发现响应发送模块，用于基于NWDAF服务发现请求向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使NWDAF服务请求网元或NWDAF服务请 求网元对应的SCP实体根据NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，向目标NWDAF网元发送NWDAF业务请求。
第五方面，本申请实施例提供了一种电子设备，包括存储器和处理器；
存储器中存储有计算机程序；
处理器，用于执行计算机程序以实现本申请任一实施例中所提供的方法。
第六方面，本申请实施例提供了一种计算机可读存储介质，其特征在于，计算机可读存储介质上存储有计算机程序，计算机程序被处理器执行时实现本申请任一实施例中所提供的方法。
本申请附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对本申请实施例描述中所需要使用的附图作简单地介绍。
图1为NWDAF进行数据收集的示意图；
图2为NWDAF进行分析数据的开放的示意图；
图3为本申请实施例提供的一种NWDAF网元的选择方法的流程示意图；
图4为本申请实施例的一个示例中NWDAF网元的选择方法的流程示意图；
图5为本申请实施例提供的一种NWDAF网元的选择方法的流程示意图；
图6为本申请实施例中NWDAF网元的选择方法采用直接通信时的通信交互图；
图7为本申请实施例中NWDAF网元的选择方法采用间接通信时的 通信交互图；
图8为本申请实施例提供的一种NWDAF网元的选择装置的结构框图；
图9为本申请实施例提供的一种NWDAF网元的选择装置的结构框图；
图10为本申请实施例提供的一种电子设备的结构示意图。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能解释为对本发明的限制。
本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，本申请的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其它特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其它元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
首先对本申请涉及的几个名词进行介绍和解释：
NWDAF：Network Data Analytics Function，网络数据分析功能。
NF：Network Function，网络功能。
NRF：Network Repository Function网络注册存储功能。
AF：Application Function，应用功能。
OAM：Operation Administration and Maintenance，网管系统。
SCP：Service Communication Proxy，服务通信代理。
S-NSSAI：Single Network Slice Selection Assistance Information，网络切片标识。
Analytics ID：网络数据分析服务的类型标识。
NWDAF的架构可如图1和图2所示，其中，图1为NWDAF的数据收集的示意图，图2为NWDAF的分析数据(服务分析结果)的开放的示意图。具体来说，NWDAF可以从特定的NF(Network Function，网络功能)、OAM(Operation Administration and Maintenance，网管系统)或AF(Application Function，应用功能)收集特定的数据，经过一定的大数据分析网元得出一定的分析结果，并把该结果按需发送给特定的NF、OAM或AF。目前在选取NWDAF时，一般只考虑了大数据分析的场景和需求，很难获得最优的NWDAF。在图1中，Nnf接口可以被NWDAF调用从而实现NWDAF从任何NF接收数据。在图2中，Nnwdaf为NWDAF网元对外提供的服务化接口。
在R16的eNA课题中，提出了针对不同的场景，NWDAF需要从哪些网络功能收集数据，以及分析结果需要发送给哪些网络功能使用，并定义了针对特定的场景的具体实现流程，而对NWDAF对每一个网络数据分析服务采用的大数据分析算法并未进行标准化。因此，同一个NWDAF网元的每一种网络数据分析服务可以对应一种特定的NWDAF算法，不同的NWDAF网元对于同一个网络数据分析服务(即同一个场景和需求)进行分析时，由于所采取的的大数据分析算法可能不同而且使用的训练样本可能不同，所以对应的处理时间和得到的分析结果的准确度也存在较大差异。换言之，不同的NWDAF网元对于同一个网络数据分析服务进行分析时，不同的NWDAF网元的性能(如分析时间以及分析结果的准确性等)存在差异。在需要从NWDAF网元中选择一个NWDAF网元为NWDAF服务请求网元提供网络数据分析服务时，一般是考虑NWDAF服务请求网元所发送的服务发现请求中包含的Analytics ID(s)，以及可能包含的S-NSSAI、和/或所处的服务区信息，来选择相匹 配的NWDAF网元为NWDAF服务请求网元提供网络数据分析服务，但是上述方案选出的NWDAF网元只能保证能够为NWDAF服务请求网元提供网络数据分析服务，而无法保证进行网络数据分析的性能。
针对上述问题，本申请实施例提供了一种NWDAF网元的选择方法，图3为本申请实施例提供的一种NWDAF网元的选择方法的流程示意图，如图3所示，该方法的执行主体可以是位于电子设备上的NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体，为了便于描述，在后文中，将该执行主体统称为NWDAF服务请求者。如图3中所示，该方法可以包括以下步骤。
步骤S301，向NRF网元发送NWDAF服务发现请求。
其中，NRF网元中存储有在其上注册过的各NWDAF网元中对应的NWDAF网元的概况信息，该概况信息除了包含对应的NWDAF网元所对应的网络切片的网络切片标识(S-NSSAI)、所支持的各网络数据分析服务的类型标识(Analytics ID(s))、以及所处的服务区信息等信息外，还包括对应的NWDAF网元对于所支持的各网络数据分析服务的性能参数信息。
具体地，根据NWDAF网元对应的S-NSSAI可以确定该NWDAF网元对应的网络切片。根据NWDAF网元对应的Analytics ID(s)可以确定该NWDAF网元所支持的网络数据分析服务的类型。可以理解的是，由于每个NWDAF网元可以支持一种或多种类型的网络数据分析服务，那么每个NWDAF网元对应一个或多个Analytics ID，所以可以用“Analytics ID(s)”表示NWDAF网元所支持的网络数据分析服务的类型标识，进一步地，当NWDAF网元仅对应一个Analytics ID时用Analytics ID表示，当NWDAF网元对应多个Analytics ID时用Analytics IDs表示。NWDAF网元的服务区信息可以用于确定该NWDAF网元的服务区域，例如，该服务区信息可以是跟踪区列表信息。NWDAF网元对不同网络数据分析服务的性能参数信息可以用于表征NWDAF网元对不同网络数据分析服务进行数据分析时的性能的优劣。
其中，NWDAF服务发现请求中包含有NWDAF服务发现参数，该 NWDAF服务发现参数中包含所请求的网络数据分析服务的类型标识(Analytics ID)，在本申请实施例中，该NWDAF服务发现参数中还可以包含目标NWDAF网元的网络切片的网络切片标识(S-NSSAI)、和/或目标NWDAF网元所处的服务区信息等信息。
步骤S302，接收NRF网元基于NWDAF服务发现请求发送的NWDAF服务发现响应，其中，NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息。
具体地，NWDAF服务请求者向NRF网元发送NWDAF服务发现请求后，NRF将其存储的各NWDAF网元的概况信息与接收到的NWDAF服务发现请求信息中的NWDAF服务发现参数相比较，将概况信息与发现参数相匹配的各NWDAF网元作为用于后续确定目标NWDAF网元的备选的NWDAF网元。上述比较过程可以理解为NRF网元根据发现参数在NRF网元中对NWDAF进行初步筛选，得到各备选的NWDAF网元的过程。
然后，NRF网元将各备选的NWDAF网元对于所请求的网络数据分析服务的性能参数信息和各备选的NWDAF网元的标识，通过NWDAF服务发现响应发送至NWDAF服务请求者。在实际应用中，NRF网元可以将各备选的NWDAF网元对应的性能参数和对应的标识以一一对应的方式存储在NWDAF性能列表中，再将该NWDAF性能列表发送至NWDAF服务请求者。或者，NRF网元直接将各备选的NWDAF网元的概况信息，通过NWDAF服务发现响应发送至NWDAF服务请求者。可以理解的是，NWDAF网元的概况信息除了包括前文提到了的各信息外，还包括NWDAF网元的标识。
可以理解的是，当NWDAF服务发现参数中仅包含所请求的网络数据分析服务的Analytics ID时，NWDAF网元的概况信息与发现参数相匹配指的是，NWDAF网元所支持的网络数据分析服务中包括NWDAF服务请求者所请求的网络数据分析服务，也即NWDAF网元所对应的Analytics ID(s)包含NWDAF服务请求者所请求的网络数据分析服务所对应的Analytics ID。当该NWDAF服务发现参数中还包含目标 NWDAF网元的S-NSSAI、以及目标NWDAF网元所处的服务区信息时，NWDAF网元的概况信息与发现参数相匹配指的是，除了满足NWDAF网元所对应的Analytics ID(s)包含NWDAF服务请求者所请求的网络数据分析服务所对应的Analytics ID以外，还满足NWDAF网元所对应的S-NSSAI和服务区信息，与发现参数中的S-NSSAI和服务区信息相同。
通过上述方式对NWDAF网元进行初步筛选，能够保证得到的各备选的NWDAF网元能够为NWDAF服务请求网元提供网络数据分析服务。
步骤S303，根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
其中，由于不同的备选的NWDAF网元对于所请求的网络数据分析服务的性能参数信息不同，且性能参数能够表征NWDAF网元对于所请求的网络数据分析服务进行数据分析时的性能的优劣，故可以将性能参数作为依据来选取目标NWDAF网元。
具体地，NWDAF服务请求者在接收到NWDAF服务发现响应后，根据NWDAF服务发现响应中的性能参数信息进一步确定出目标NWDAF网元。在NWDAF服务请求者确定出目标NWDAF网元后，即可以向目标NWDAF网元发送NWDAF业务请求，该NWDAF业务请求中包含有目标NWDAF网元的标识和所请求的网络数据分析服务的Analytics ID。目标NWDAF网元接收到NWDAF业务请求后，向NWDAF服务请求网元(或NWDAF服务请求者)发送NWDAF业务响应，该NWDAF业务响应中包含有目标NWDAF网元对所请求的网络数据分析服务的分析结果。
为了更好的说明本申请实施例所提供的方案，下面结合具体的示例对该方案进行详细描述。
图4中示出了本示例中所提供的一种NWDAF网元的选择方法的原理示意图。如图4中所示，该示例中的NWDAF服务请求者为NWDAF服务请求网元，具体为NF网元。在实际应用中，可以将NWDAF网元 理解为服务生产者(或提供者)，将NWDAF服务请求网元理解为服务消费者(或接受者)，故图4中的NF消费者对应于本申请方案中的NF网元，那么本示例中的方案的执行过程可以包括如下步骤：
步骤41，NF消费者向NRF网元发送NWDAF服务发现请求，该NWDAF服务发现请求中包含NF消费者所请求的网络数据分析服务的Analytics ID和其它的参数信息；
步骤42，NRF网元基于NWDAF服务发现请求向NF消费者发送NWDAF服务发现响应，该NWDAF服务发现响应中包含满足服务发现请求中的参数信息的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，NF消费者根据各NWDAF网元对应的性能参数信息确定出目标NWDAF网元；
步骤43，NF消费者向目标NWDAF网元发送NWDAF业务请求，该NWDAF业务请求中包含有所请求的网络数据分析服务的Analytics ID，目标NWDAF网元接收到NWDAF业务请求后，向NWDAF服务请求网元(即图4中的NF消费者)发送NWDAF业务响应，该NWDAF业务响应中包含有目标NWDAF网元对所请求的网络数据分析服务的分析结果。
本申请实施例所提供的方案，在将NWDAF业务请求发送至目标NWDAF网元之前，能够通过向NRF网元发送NWDAF服务发现请求，以获取包含了满足服务发现请求中的参数信息的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息的NWDAF服务发现响应，从而能够基于各NWDAF网元对应的性能参数信息，从中选取最合适的目标NWDAF网元，保证了选出的目标NWDAF对所请求的网络数据分析服务进行分析处理的性能，为获取到最好的NWDAF结果提供了基础。
在本申请实施例中，还包括NRF网元与NWDAF网元之间的签约性能参数通知的步骤40。
在本申请的实施例中，对于每一NWDAF网元，性能参数信息包括该NWDAF网元对于每一网络数据分析服务的服务分析结果的平均预测置信度；
根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，包括：
将NWDAF服务发现响应中所包含的各NWDAF网元中对于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元，确定为目标NWDAF网元。
其中，性能参数信息具体为各个网络数据分析服务的分析结果的平均预测置信度，即利用服务分析结果的平均预测置信度来表征对应的NWDAF网元对于该网络数据分析服务的分析性能的优劣。
其中，预测置信度是指以预测值为中心，在一定范围内，真值出现在该范围内的几率。各NWDAF网元对于服务分析结果的预测置信度表征的是各NWDAF网元预测出的服务分析结果的可靠度。
具体地，NWDAF服务请求者在根据各备选的NWDAF网元对于所请求的网络数据分析服务对应的平均预测置信度来选择目标NWDAF网元时，由于平均预测置信度越大说明对应的备选的NWDAF网元服务分析结果的准确性越高，即对应的备选的NWDAF网元的性能越好，那么可以将各备选的NWDAF网元中对应的平均预测置信度最大的NWDAF网元确定为目标NWDAF网元。
在本申请的实施例中，对于每一NWDAF网元，该NWDAF网元对于每一网络数据分析服务的平均预测置信度是NWDAF网元通过以下方式确定的：
统计该NWDAF网元对于每一网络数据分析服务的历史预测置信度；
基于每一网络数据分析服务的各历史预测置信度，确定该NWDAF网元对于每一网络数据分析服务的平均预测置信度。
其中，由于NWDAF网元中对应的大数据分析算法是基于机器学习的数据分析算法，其对于同一类型网络数据分析服务的分析结果的准确性可能会随着分析次数的增加而发生改变。一般来说，分析结果的准确性随着分析次数的增加而提高，那么，NWDAF网元对应的该网络数据分析服务的各历史预测置信度都不相同。
具体地，每个NWDAF网元在完成一次网络数据分析后，会同时给出分析结果的预测置信度，统计一定次数的网络数据分析对应的预测置信度(即为历史预测置信度)并对其求平均值，即可得到该NWDAF网元对于该网络数据分析服务的对应的平均预测置信度。
在本申请的实施例中，该方法的执行主体为NWDAF服务请求网元或与NWDAF服务请求网元对应的SCP实体，所述NWDAF服务请求网元包括NF网元、AF网元或OAM；
若方法的执行主体为SCP实体，则该方案在执行时NWDAF服务请求网元与NRF网元间接通信。向NRF网元发送NWDAF服务发现请求，包括：
接收NWDAF服务请求网元发送的NWDAF业务请求，NWDAF业务请求包括所请求的网络数据分析服务的类型标识；
基于NWDAF业务请求，向NRF网元发送NWDAF服务发现请求。
进一步地，选择用于提供所请求的网络数据分析服务的目标NWDAF网元之后，该方法还包括：
将NWDAF业务请求发送至目标NWDAF网元，；
接收目标NWDAF网元对于NWDAF业务请求的NWDAF业务响应，并将NWDAF业务响应发送至NWDAF服务请求网元。
其中，当该方法的执行主体为NWDAF服务请求网元时，该方案在执行时NWDAF服务请求网元与NRF网元直接通信。当执行主体为NWDAF服务请求网元对应的SCP实体时，该方案在执行时对应的SCP实体与NRF网元通信，NWDAF服务请求网元与对应的SCP实体网元通信。
具体地，当执行主体为SCP实体时，SCP实体可以理解为一个中转服务器，那么，所需的网络数据分析服务的Analytics ID来自NWDAF服务请求网元，且确定出的目标NWDAF网元提供的分析结果也将最终发送给NWDAF服务请求网元以供其使用。
换言之，SCP实体与NWDAF服务请求网元之间通信，SCP实体首先接收NWDAF服务请求网元发送的NWDAF业务请求，该请求中包含 所请求的网络数据分析服务的Analytics ID。在本申请实施例中，该请求中也会包含所需选择的NWDAF网元的S-NSSAI和服务区信息。在确定目标NWDAF网元的过程中，SCP实体作为执行主体按前文描述的方式与NRF网元进行通信，并确定出目标NWDAF网元，其中其向NRF网元发送的NWDAF服务发现请求中包含的NWDAF服务发现参数中，包含的S-NSSAI和服务区信息为所需选择的NWDAF的信息，对应于NWDAF服务请求网元发送的业务请求中包含的S-NSSAI和服务区信息。而该NWDAF服务发现参数中包含的Analytics ID也为对应的NWDAF服务请求网元发送的业务请求中所包含的Analytics ID。在确定出目标NWDAF网元之后，SCP实体与目标NWDAF网元通信获取对应的目标NWDAF网元对于该网络数据分析服务提供的分析结果，并将该分析结果发送至NWDAF服务请求网元。
可以理解的是，NWDAF服务请求网元向SCP实体发送的NWDAF业务请求与SCP实体向NWDAF网元发送的NWDAF业务请求两者所包含的信息并不相同。前者包含所请求的网络数据分析服务的类型标识，在本申请实施例中，前者也会包含所需选择的NWDAF网元的S-NSSAI和服务区信息。而后者只包含所请求的网络数据分析服务的标识，不会包含S-NSSAI和服务区信息。
在本申请的实施例中，NWDAF服务发现响应中还包括各NWDAF网元对于所请求的网络数据分析服务的服务分析结果的有效时长；
在下一次发送针对所请求的网络数据分析服务的NWDAF业务请求时，若下一次的NWDAF业务请求的发起时刻与接收到NWDAF发现响应的时差不大于有效时长，该方法还可以包括：
基于NWDAF发现响应中的所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择下一次的NWDAF业务请求所对应的目标NWDAF网元。
具体地，在直接通信的情形下，NWDAF服务请求网元可能会多次请求相同的网络数据分析服务；在间接通信的情形下，与同一个SCP实体对应的多个NWDAF服务请求网元中，一个NWDAF服务请求网元可 能会与另外一个NWDAF服务请求网元请求相同的网络数据分析服务。在这两种情形下，按照前文描述的方式进行目标NWDAF网元的确认过程中，NWDAF服务请求网元或SCP实体都需要重复与NRF网元通信，以获取相应的各NWDAF对应的性能参数。
那么，可以认为自NRF网元发出NWDAF服务发现响应的服务之后的预设时长中(即下一次的NWDAF业务请求的发起时刻与接收到NWDAF发现响应的时差不大于有效时长)，该NWDAF服务发现响应中的性能参数信息对于相同的网络数据分析服务保持有效，即可以将该NWDAF服务发现响应中的性能参数信息，作为在预设时长中选择对于相同的网络数据分析服务的目标NWDAF网元的依据，从而无需重复与NRF网元通信，提高运行效率。
在本申请的实施例中，基于NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定下一次的NWDAF业务请求所对应的目标NWDAF网元，包括：
若未接收到NRF网元所发送的NWDAF服务更新通知，则基于NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定下一次NWDAF业务请求所对应的目标NWDAF网元；其中，NWDAF服务更新通知包含性能参数发生变化的NWDAF网元的标识，以及性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值；
若接收到了NRF网元所发送的NWDAF服务更新通知，则基于NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值，确定下一次NWDAF业务请求所对应的目标NWDAF网元。
其中，虽然可以认为自NRF网元发出NWDAF服务发现响应的服务之后的预设时长中，该NWDAF服务发现响应中的性能参数信息对于相同的网络数据分析服务保持有效，但是，在自NRF网元发出NWDAF服务发现响应的服务之后的预设时长中，若存在任一NWDAF网元对于所请求的网络数据分析服务的性能参数信息发生变化，为了保证性能参数信息的有效性，任一NWDAF网元会将变化后的网络数据分析服务的 性能参数信息发送给NRF网元。NRF网元会保存该NWDAF发送的变化后的信息，并将该NWDAF网元对应的变化后的性能参数信息通过NWDAF服务更新通知发送至接收过该NWDAF网元的性能参数信息的NWDAF服务请求网元或SCP实体。
具体地，若未接收到NWDAF服务更新通知，则认为各NWDAF网元对于所请求的网络数据分析服务的性能参数信息没有发生变化，基于NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定下一次NWDAF业务请求所对应的目标NWDAF网元。若接收到对于任一NWDAF网元的NWDAF服务更新通知，则认为该NWDAF网元对于所请求的网络数据分析服务的性能参数信息发生变化。根据服务更新通知中的性能参数发生变化的NWDAF网元的标识确定出要更新的NWDAF网元，然后保存在服务发现响应中的该NWDAF网元的性能参数信息会被替换为服务更新通知中所包含的该NWDAF网元的性能参数信息，基于更新后的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定下一次NWDAF业务请求所对应的目标NWDAF网元。
可以理解的是，若下一次的NWDAF业务请求的发起时刻与接收到NWDAF服务发现响应的时差大于有效时长，则NWDAF服务请求网元或SCP实体需要再次向NRF网元发送NWDAF服务发现请求，并根据NRF网元发送的NWDAF服务发现响应中的各NWDAF网元所对应的性能参数信息，确定用于提供所请求的网络数据分析服务的目标NWDAF网元。
图5为本申请实施例提供的一种NWDAF网元的选择方法的流程示意图，如图5所示，该方法的执行主体可以为位于电子设备上的NRF网元，该方法可以包括以下步骤。
步骤S501，接收NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送的NWDAF服务发现请求。
其中，NRF网元中存储有在其上注册过的各NWDAF网元中对应的 NWDAF网元的概况信息，该概况信息除了包含对应的NWDAF网元所对应的网络切片的网络切片标识(S-NSSAI)、所支持的各网络数据分析服务的类型标识(Analytics ID(s))、以及所处的服务区信息等信息外，还包括对应的NWDAF网元对于所支持的各网络数据分析服务的性能参数信息。
具体地，根据NWDAF网元对应的S-NSSAI可以确定该NWDAF网元对应的网络切片。根据NWDAF网元对应的Analytics ID(s)可以确定该NWDAF网元所支持的网络数据分析服务的类型。可以理解的是，由于每个NWDAF网元可以支持一种或多种类型的网络数据分析服务，那么每个NWDAF网元对应一个或多个Analytics ID，所以可以用“Analytics ID(s)”表示NWDAF网元所支持的网络数据分析服务的类型标识，进一步地，当NWDAF网元仅对应一个Analytics ID时用Analytics ID表示，当NWDAF网元对应多个Analytics ID时用Analytics IDs表示。NWDAF网元的服务区信息可以用于确定该NWDAF网元的服务区域，例如，该服务区信息可以是跟踪区列表信息。NWDAF网元对不同网络数据分析服务的性能参数信息可以用于表征NWDAF网元对不同网络数据分析服务进行数据分析时的性能的优劣。
其中，NWDAF服务发现请求中包含有NWDAF服务发现参数，该NWDAF服务发现参数中包含所请求的网络数据分析服务的类型标识(Analytics ID)，在本申请实施例中，该NWDAF服务发现参数中还可以包含目标NWDAF网元的网络切片的网络切片标识(S-NSSAI)、和/或目标NWDAF网元所处的服务区信息等信息。
步骤S502，基于NWDAF服务发现请求向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体根据NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
具体地，NWDAF服务请求者向NRF网元发送NWDAF服务发现请求后，NRF将其存储的各NWDAF网元的概况信息与接收到的NWDAF服务发现请求信息中的NWDAF服务发现参数相比较，将概况信息与发现参数相匹配的各NWDAF网元作为用于后续确定目标NWDAF网元的备选的NWDAF网元。上述比较过程可以理解为NRF网元根据发现参数在NRF网元中对NWDAF进行初步筛选，得到各备选的NWDAF网元的过程。
然后，NRF网元将各备选的NWDAF网元对于所请求的网络数据分析服务的性能参数信息和各备选的NWDAF网元的标识，通过NWDAF服务发现响应发送至NWDAF服务请求者。在实际应用中，NRF网元可以将各备选的NWDAF网元对应的性能参数和对应的标识以一一对应的方式存储在NWDAF性能列表中，再将该NWDAF性能列表发送至NWDAF服务请求者。或者，NRF网元直接将各备选的NWDAF网元的概况信息，通过NWDAF服务发现响应发送至NWDAF服务请求者。可以理解的是，NWDAF网元的概况信息除了包括前文提到了的各信息外，还包括NWDAF网元的标识。
可以理解的是，当NWDAF服务发现参数中仅包含所请求的网络数据分析服务的Analytics ID时，NWDAF网元的概况信息与发现参数相匹配指的是，NWDAF网元所支持的网络数据分析服务中包括NWDAF服务请求者所请求的网络数据分析服务，也即NWDAF网元所对应的Analytics ID(s)包含NWDAF服务请求者所请求的网络数据分析服务所对应的Analytics ID。当该NWDAF服务发现参数中还包含目标NWDAF网元的S-NSSAI、以及目标NWDAF网元所处的服务区信息时，NWDAF网元的概况信息与发现参数相匹配指的是，除了满足NWDAF网元所对应的Analytics ID(s)包含NWDAF服务请求者所请求的网络数据分析服务所对应的Analytics ID以外，还满足NWDAF网元所对应的S-NSSAI和服务区信息，与发现参数中的S-NSSAI和服务区信息相同。
通过上述方式对NWDAF网元进行初步筛选，能够保证得到的各备 选的NWDAF网元能够为NWDAF服务请求网元提供网络数据分析服务。
其中，由于不同的备选的NWDAF网元对于所请求的网络数据分析服务的性能参数信息不同，且性能参数能够表征NWDAF网元对于所请求的网络数据分析服务进行数据分析时的性能的优劣，故可以将性能参数作为依据来选取目标NWDAF网元。
具体地，NWDAF服务请求者在接收到NWDAF服务发现响应后，根据NWDAF服务发现响应中的性能参数信息进一步确定出目标NWDAF网元。在NWDAF服务请求者确定出目标NWDAF网元后，即可以向目标NWDAF网元发送NWDAF业务请求，该NWDAF业务请求中包含有目标NWDAF网元的标识和所请求的网络数据分析服务的Analytics ID。目标NWDAF网元接收到NWDAF业务请求后，向NWDAF服务请求网元(或NWDAF服务请求者)发送NWDAF业务响应，该NWDAF业务响应中包含有目标NWDAF网元对所请求的网络数据分析服务的分析结果。
本申请实施例所提供的方案，在将NWDAF业务请求发送至目标NWDAF网元之前，能够通过向NRF网元发送NWDAF服务发现请求，以获取包含了满足服务发现请求中的参数信息的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息的NWDAF服务发现响应，从而能够基于各NWDAF网元对应的性能参数信息，从中选取最合适的目标NWDAF网元，保证了选出的目标NWDAF对所请求的网络数据分析服务进行分析处理的性能，为获取到最好的NWDAF结果提供了基础。
在本申请的实施例中，该方法由网络注册存储功能NRF网元执行，NRF网元签约各NWDAF网元的性能参数通知信息，该方法还可以包括以下步骤：
接收各NWDAF网元发送的性能参数通知信息，性能参数通知信息中包含各NWDAF网元所支持的各NWDAF网元对于各网络数据分析服务的性能参数信息；
存储各NWDAF网元所支持的各NWDAF网元对于各网络数据分析服务的性能参数信息。
需要说明的是，在NWDAF网元数量较小时，NWDAF服务请求网元(NF网元、AF网元或OAM等)，还可以直接配置各个NWDAF的概况信息，并签约各NWDAF网元的性能参数通知信息，而不需要通过NRF网元进行服务发现的请求和响应流程。那么，NWDAF服务请求网元可以直接获取各NWDAF网元所支持的各NWDAF网元对于各网络数据分析服务的性能参数信息的更新通知，并替换之前保存的参数信息，进而根据前文描述的方式确定目标NWDAF网元。
在本申请的实施例中，NRF网元签约NWDAF网元的性能参数变更通知信息，该方法还包括以下步骤：
接收各NWDAF网元发送的性能参数变更通知信息；
基于性能参数变更通知信息，对相应的已存储的NWDAF网元对于相应的网络数据分析服务的性能参数信息进行更新。
其中，性能参数变更通知信息包含该NWDAF网元的标识、所支持的网络数据分析服务的Analytics ID(s)、以及对于各网络数据分析服务的性能参数信息。
具体地，NRF网元签约NWDAF性能参数信息变更通知信息，当NWDAF网元中有NWDAF网元对应的性能参数信息发生变化时，NWDAF网元将变化后的各NWDAF的标识、所支持的网络数据分析服务的Analytics ID、以及对于各网络数据分析服务的性能参数信息发送至NRF网元，用于对NRF网元中对应的信息进行更新。
在本申请的实施例中，对于每一NWDAF网元，性能参数信息包括该NWDAF网元对于每一网络数据分析服务的服务分析结果的平均预测置信度；
目标NWDAF网元为NWDAF服务发现响应中包含的各NWDAF网元中对于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元。
其中，性能参数信息具体为对于每一网络数据分析服务的数据分析结果的平均预测置信度，即利用数据分析结果的平均预测置信度来表征对应NWDAF网元对于该网络数据分析服务的分析性能的优劣。
其中，预测置信度是指以预测值为中心，在一定范围内，真值出现在该范围内的几率。各NWDAF网元对于每一网络数据分析服务的数据分析结果的预测置信度表征的是各NWDAF网元对于每一网络数据分析服务预测出的数据分析结果的可靠度。
具体地，NWDAF服务请求者在根据各备选的NWDAF网元的对应于所请求的网络数据分析服务的平均预测置信度来选择目标NWDAF网元时，由于平均预测置信度越大说明对应的备选的NWDAF网元的对应于所请求的数据服务的数据分析结果的准确性和可靠性越高，即对应的备选的NWDAF网元对应于所请求的网络数据分析服务的分析性能越好，那么可以将各备选的NWDAF网元中对应于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元确定为目标NWDAF网元。
在本申请的实施例中，NWDAF服务发现响应中还包含各NWDAF网元对于所请求的网络数据分析服务的服务分析结果的有效时长；
若在与NWDAF服务发现响应的发送时刻的时差小于有效时长的时刻接收到了性能参数变更通知信息，且接收到的性能参数变更通知信息包含NWDAF服务发现响应中所包含的至少一个NWDAF网元对于所请求的网络数据分析服务的性能参数信息，该方法还包括：
向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务更新通知，NWDAF服务更新通知包含性能参数发生变化NWDAF网元的标识，以及性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值。
具体地，虽然可以认为自NRF网元发出NWDAF服务发现响应的预设时长中，该NWDAF服务发现响应中的性能参数信息对于相同的网络数据分析服务保持有效，但是，在自NRF网元发出NWDAF服务发现响应的服务之后的预设时长中，若存在NWDAF网元对于网络数据分析服务的性能参数信息发生变化，为了保证性能参数信息的有效性和准确性，任一NWDAF网元会将变化后的性能参数信息发送给NRF网元，NRF网元会将该NWDAF网元对应的变化后的性能参数信息通过NWDAF服务更新通知发送至NWDAF服务请求者。
下面参考图6和图7对本申请提供的NWDAF网元的选择方法中所涉及的通信交互过程进行进一步说明。
如图6所示，该方法的执行主体为NF消费者(即前文中的NWDAF服务请求网元)，对于网络架构中的直接通信方案，整个业务流程涉及NWDAF网元端、NRF网元端以及NF消费者端。那么NWDAF网元的服务交互过程可以包括以下步骤：
步骤60，NRF网元签约NWDAF网元的性能参数信息变更通知，当NWDAF网元中有任一网络数据分析服务的性能参数信息发生变化时，NWDAF网元将变化后的性能参数发送至NRF网元；
步骤61，NF消费者向NRF网元发送NWDAF服务发现请求，该NWDAF服务发现请求中包含的NWDAF服务发现参数中包含所请求的网络数据分析服务的Analytics ID，在本申请实施例中，还会包含所需选择的NWDAF网元对应的S-NSSAI、以及/或者服务区信息等信息；
步骤62，NRF网元基于NWDAF服务发现请求向NF消费者发送NWDAF服务发现响应，该NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
步骤63，NF消费者根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求，该NWDAF业务请求中包含所请求的网络数据服务的标识；目标NWDAF网元基于NWDAF业务请求向NF消费者发送NWDAF业务响应，该NWDAF业务响应中包含目标NWDAF网元对所请求的网络数据分析服务的分析结果。
如图7所示，该方法的执行主体为与NF消费者对应的SCP实体，对于网络架构中的间接通信方案，整个业务流程涉及NWDAF网元端、NRF网元端、SCP实体端以及NF消费者端。那么NWDAF网元的服务交互过程可以包括以下步骤：
步骤70，NRF网元签约NWDAF网元的性能参数信息变更通知，当NWDAF网元中有任一网络数据分析服务的性能参数信息发生变化时，NWDAF网元将变化后的性能参数发送至NRF网元；
步骤71，NF消费者向SCP实体发送NWDAF业务请求，该NWDAF业务请求包括所请求的网络数据分析服务的标识，在本申请实施例中，还会包含所需选择的NWDAF网元的S-NSSAI和服务区信息等信息；
步骤72，SCP实体向NRF网元发送NWDAF服务发现请求，该NWDAF服务发现请求中包含的NWDAF服务发现参数中包含NF消费者所请求的网络数据分析服务的Analytics ID，以及所需选择的NWDAF网元的S-NSSAI和服务区信息等信息；
步骤73，NRF网元基于NWDAF服务发现请求向SCP实体发送NWDAF服务发现响应，该NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
步骤74，SCP实体根据服务发现响应中包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求，该NWDAF业务请求中包含所请求的网络数据分析服务的标识；
步骤75，目标NWDAF网元基于NWDAF业务请求向SCP实体发送NWDAF业务响应，该NWDAF业务响应中包含目标NWDAF网元对所请求的网络数据分析服务的分析结果；
步骤76，SCP实体将接收到的NWDAF业务响应发送至NF消费者。
图8为本申请实施例提供的一种NWDAF网元的选择装置的结构框图，如图8所示，该装置800可以包括：服务发现请求发送模块801、服务发现响应接收模块802和NWDAF网元选择模块803，其中：
服务发现请求发送模块801用于向网络注册存储功能NRF网元发送NWDAF服务发现请求；
服务发现响应接收模块802用于接收NRF网元基于NWDAF服务发现请求发送的NWDAF服务发现响应，其中，NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
NWDAF网元选择模块803用于根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分 析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
本申请实施例所提供的方案，在将NWDAF业务请求发送至NWDAF网元之前，能够通过向NRF网元发送NWDAF服务发现请求，以获取包含了满足服务发现请求中的参数信息的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息的NWDAF服务发现响应，从而能够基于各NWDAF网元对应的性能参数信息，从中选取最合适的目标NWDAF网元，保证了选出的目标NWDAF网元对所请求的网络数据分析服务进行分析处理的性能，为获取到最好的NWDAF结果提供了基础。
在本申请的实施例中，对于每一NWDAF网元，性能参数信息包括该NWDAF网元对于每一网络数据分析服务的服务分析结果的平均预测置信度；
NWDAF网元选择模块803具体用于：
将NWDAF服务发现响应中所包含的各NWDAF网元中对于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元，确定为目标NWDAF网元。
在本申请的实施例中，该装置还包括平均预测置信度确定模块，用于：
统计该NWDAF网元对于每一网络数据分析服务的各历史预测置信度；
基于每一网络数据分析服务的各历史预测置信度，确定该NWDAF网元对于每一网络数据分析服务的平均预测置信度。
在本申请的实施例中，该装置对应的方法的执行主体为位于电子设备上的NWDAF服务请求网元或与NWDAF服务请求网元对应的服务通信代理SCP实体，NWDAF服务请求网元包括网络功能NF网元、应用功能AF网元或网管系统OAM；
若该装置对应的方法的执行主体为SCP实体，则服务发现请求发送模块801具体用于：
接收NWDAF服务请求网元发送的NWDAF业务请求，NWDAF业务请求包括所请求的网络数据分析服务的类型标识；
基于NWDAF业务请求，向NRF网元发送NWDAF服务发现请求；
该装置还可以包括业务响应转发模块，用于：
在确定用于提供所请求的网络数据分析服务的目标NWDAF网元之后，将NWDAF业务请求发送至目标NWDAF网元；
接收目标NWDAF网元对于NWDAF业务请求的NWDAF业务响应，并将NWDAF业务响应发送至NWDAF服务请求网元。
在本申请的实施例中，NWDAF服务发现响应中还包括各NWDAF网元对于所请求的网络数据分析服务的服务分析结果的有效时长；该装置还包括下一目标NWDAF网元选择模块，用于：
在下一次发送针对所请求的网络数据分析服务的NWDAF业务请求时，若下一次的NWDAF业务请求的发起时刻与接收到NWDAF服务发现响应的时差不大于有效时长，基于NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择下一次的NWDAF业务请求所对应的目标NWDAF网元。
在本申请的实施例中，下一目标NWDAF网元选择模块具体用于：
若未接收到NRF网元所发送的NWDAF服务更新通知，则基于NWDAF发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定下一次NWDAF业务请求所对应的目标NWDAF网元；其中，NWDAF服务更新通知包含性能参数发生变化的NWDAF网元的标识，以及性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值；
若接收到了NRF网元所发送的NWDAF服务更新通知，则基于所述NWDAF服务更新通知包含的性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值，选择下一次NWDAF业务请求所对应的目标NWDAF网元。
图9为本申请实施例提供的一种NWDAF网元的选择装置的结构框图，如图9所示，该装置900可以包括：服务发现请求接收模块901和 服务发现响应发送模块902，其中：
服务发现请求接收模块901用于接收NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送的NWDAF服务发现请求；
服务发现响应发送模块902用于基于NWDAF服务发现请求向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体根据NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
本申请实施例所提供的方案，在将NWDAF业务请求发送至NWDAF网元之前，能够通过向NRF网元发送NWDAF服务发现请求，以获取包含了满足服务发现请求中的参数信息的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息的NWDAF服务发现响应，从而能够基于各NWDAF网元对应的性能参数信息，从中选取最合适的目标NWDAF网元，保证了选出的目标NWDAF网元对所请求的网络数据分析服务进行分析处理的性能，为获取到最好的NWDAF结果提供了基础。
在本申请的实施例中，该装置对应的方法由位于电子设备上的网络注册存储功能NRF网元执行，NRF网元签约各NWDAF网元的性能参数通知信息，该装置还可以包括存储模块，用于：
接收各NWDAF网元发送的性能参数通知信息，性能参数通知信息中包含各NWDAF网元所支持的各NWDAF网元对于各网络数据分析服务的性能参数信息；
存储各NWDAF网元所支持的各NWDAF网元对于各网络数据分析服务的性能参数信息。
在本申请的实施例中，NRF网元签约各NWDAF网元的性能参数变更通知信息，该装置还可以包括更新模块，用于：
接收各NWDAF网元发送的性能参数变更通知信息；
基于性能参数变更通知信息，对相应的已存储的NWDAF网元对于相应的网络数据分析服务的性能参数信息进行更新。
在本申请的实施例中，对于每一NWDAF网元，性能参数信息包括该NWDAF网元对于每一网络数据分析服务的服务分析结果的平均预测置信度；
目标NWDAF网元为NWDAF服务发现响应中包含的各NWDAF网元中对于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元。
在本申请的实施例中，NWDAF服务发现响应中还包含各NWDAF网元对于所请求的网络数据分析服务的服务分析结果的有效时长；该装置还包括服务更新通知发送模块，用于：
若在与NWDAF服务发现响应的发送时刻的时差小于有效时长的时刻接收到了性能参数变更通知信息，且接收到的性能参数变更通知信息包含NWDAF服务发现响应中所包含的至少一个NWDAF网元对于所请求的网络数据分析服务的性能参数信息，向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务更新通知，NWDAF服务更新通知包含性能参数发生变化的NWDAF网元的标识，以及性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值。
基于相同的原理，本申请实施例还提供了一种电子设备，该电子设备包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，处理器执行该计算机程序时，实现本申请任一实施例中所提供的方法，具体可实现如下几种情况：
情况一：向网络注册存储功能NRF网元发送NWDAF服务发现请求；接收NRF网元基于NWDAF服务发现请求发送的NWDAF服务发现响应，其中，NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；根据各NWDAF网元对于所请求的网络数据分析服务的的性能参数信息，选择用于提供所请求的网络 数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
情况二：接收NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送的NWDAF服务发现请求；基于NWDAF服务发现请求向NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使NWDAF服务请求网元或NWDAF服务请求网元对应的SCP实体根据NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定用于提供所请求的网络数据分析服务的目标NWDAF网元，并向目标NWDAF网元发送NWDAF业务请求。
本申请实施例提供了一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序，该程序被处理器执行时实现本申请任一实施例所示的方法。
可以理解的是，介质中存储的是NWDAF网元的选择方法对应的计算机程序。
图10中示出了本申请实施例所适用的一种电子设备的结构示意图，如图10所示，电子设备1000包括：处理器1001和存储器1003。其中，处理器1001和存储器1003相连，如通过总线1002相连。进一步地，电子设备1000还可以包括收发器1004，电子设备1000可以通过收发器1004与其它电子设备进行数据的交互。需要说明的是，实际应用中收发器1004不限于一个，该电子设备1000的结构并不构成对本申请实施例的限定。
其中，处理器1001应用于本申请实施例中，可以用于实现图8所示的服务发现请求发送模块801、服务发现响应接收模块802和NWDAF网元选择模块803的功能，或者用于实现图9所示的服务发现请求接收模块901和服务发现响应发送模块902的功能。
处理器1001可以是CPU、通用处理器、DSP、ASIC、FPGA或者其它可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框、 模块和电路。处理器1001也可以是实现计算功能的组合，例如包含一个或多个微处理器组合、DSP和微处理器的组合等。
总线1002可包括一通路，在上述组件之间传送信息。总线1002可以是PCI总线或EISA总线等。总线1002可以分为地址总线、数据总线、控制总线等。为便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
存储器1003可以是ROM或可存储静态信息和指令的其它类型的静态存储设备，RAM或者可存储信息和指令的其它类型的动态存储设备，也可以是EEPROM、CD-ROM或其它光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其它磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其它介质，但不限于此。
存储器1003用于存储执行本申请方案的应用程序代码，并由处理器1001来控制执行。处理器1001用于执行存储器1003中存储的应用程序代码，以实现图8或图9所示实施例提供的NWDAF网元的选择装置的动作。
应该理解的是，虽然附图的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，其可以以其它的顺序执行。而且，附图的流程图中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，其执行顺序也不必然是依次进行，而是可以与其它步骤或者其它步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
以上仅是本申请的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (15)

  1. 一种网络数据分析功能NWDAF网元的选择方法，由电子设备执行，包括：
    向网络注册存储功能NRF网元发送NWDAF服务发现请求；
    接收所述NRF网元基于所述NWDAF服务发现请求发送的NWDAF服务发现响应，其中，所述NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
    根据各NWDAF网元对于所请求的网络数据分析服务的所述性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向所述目标NWDAF网元发送NWDAF业务请求。
  2. 根据权利要求1所述的方法，对于每一NWDAF网元，所述性能参数信息包括该NWDAF网元对于每一网络数据分析服务的服务分析结果的平均预测置信度；
    所述根据各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，包括：
    将所述NWDAF服务发现响应中所包含的各NWDAF网元中对于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元，确定为所述目标NWDAF网元。
  3. 根据权利要求2所述的方法，对于每一NWDAF网元，该NWDAF网元对于每一网络数据分析服务的平均预测置信度是所述NWDAF网元通过以下方式确定的：
    统计该NWDAF网元对于每一网络数据分析服务的各历史预测置信度；
    基于每一网络数据分析服务的各历史预测置信度，确定该NWDAF网元对于每一网络数据分析服务的平均预测置信度。
  4. 根据权利要求1所述的方法，其中，所述向NRF网元发送NWDAF服务发现请求，包括：
    接收NWDAF服务请求网元发送的NWDAF业务请求，所述 NWDAF业务请求包括所述所请求的网络数据分析服务的类型标识；
    基于所述NWDAF业务请求，向所述NRF网元发送NWDAF服务发现请求；
    所述选择用于提供所请求的网络数据分析服务的目标NWDAF网元之后，该方法还包括：
    将所述NWDAF业务请求发送至所述目标NWDAF网元；
    接收所述目标NWDAF网元对于所述NWDAF业务请求的NWDAF业务响应，并将所述NWDAF业务响应发送至所述NWDAF服务请求网元。
  5. 根据权利要求1所述的方法，所述NWDAF服务发现响应中还包括各NWDAF网元对于所请求的网络数据分析服务的服务分析结果的有效时长；
    所述方法还包括：
    在下一次发送针对所述所请求的网络数据分析服务的NWDAF业务请求时，若下一次的NWDAF业务请求的发起时刻与接收到所述NWDAF服务发现响应的时差不大于所述有效时长，基于所述NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择所述下一次的NWDAF业务请求所对应的目标NWDAF网元。
  6. 根据权利要求5所述的方法，所述基于所述NWDAF发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定所述下一次的NWDAF业务请求所对应的目标NWDAF网元，包括：
    若未接收到所述NRF网元所发送的NWDAF服务更新通知，则基于所述NWDAF发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，确定所述下一次NWDAF业务请求所对应的目标NWDAF网元；其中，所述NWDAF服务更新通知包含性能参数发生变化的NWDAF网元的标识，以及性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值；
    若接收到了所述NRF网元所发送的NWDAF服务更新通知，则基于所述NWDAF服务更新通知包含的性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值，选择所述下一次NWDAF业务请求所对应的目标NWDAF网元。
  7. 一种网络数据分析功能NWDAF网元的选择方法，由电子设备执行，包括：
    接收NWDAF服务请求网元或所述NWDAF服务请求网元对应的服务通信代理SCP实体发送的NWDAF服务发现请求；
    基于所述NWDAF服务发现请求向所述NWDAF服务请求网元或所述NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使所述NWDAF服务请求网元或所述NWDAF服务请求网元对应的SCP实体根据所述NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向所述目标NWDAF网元发送NWDAF业务请求。
  8. 根据权利要求7所述的方法，还包括：
    接收各NWDAF网元发送的性能参数通知信息，所述性能参数通知信息中包含各NWDAF网元所支持的各网络数据分析服务的性能参数信息；
    存储各NWDAF网元所支持的各网络数据分析服务的性能参数信息。
  9. 根据权利要求8所述的方法，还包括：
    接收各NWDAF网元发送的性能参数变更通知信息；
    基于所述性能参数变更通知信息，对相应的已存储的NWDAF网元对于相应的网络数据分析服务的性能参数信息进行更新。
  10. 根据权利要求7所述的方法，对于每一NWDAF网元，所述性能参数信息包括该NWDAF网元对于每一网络数据分析服务的服务分析结果的平均预测置信度；
    所述目标NWDAF网元为所述NWDAF服务发现响应中包含的各 NWDAF网元中对于所请求的网络数据分析服务的平均预测置信度最大的NWDAF网元。
  11. 根据权利要求10所述的方法，所述NWDAF服务发现响应中还包含各NWDAF网元对于所请求的网络数据分析服务的服务分析结果的有效时长；
    所述方法还包括：
    若在与所述NWDAF服务发现响应的发送时刻的时差小于所述有效时长的时刻接收到了性能参数变更通知信息，且接收到的性能参数变更通知信息包含所述NWDAF服务发现响应中所包含的至少一个NWDAF网元对于所请求的网络数据分析服务的性能参数信息，向所述NWDAF服务请求网元或所述NWDAF服务请求网元对应的SCP实体发送NWDAF服务更新通知，所述NWDAF服务更新通知包含性能参数发生变化的NWDAF网元的标识，以及性能参数发生变化的NWDAF网元对于所请求的网络数据分析服务的性能参数信息的更新后的数值。
  12. 一种网络数据分析功能NWDAF网元的选择装置，包括：
    服务发现请求发送模块，用于向网络注册存储功能NRF网元发送NWDAF服务发现请求；
    服务发现响应接收模块，用于接收所述NRF网元基于所述NWDAF服务发现请求发送的NWDAF服务发现响应，其中，所述NWDAF服务发现响应中包含各NWDAF网元对于所请求的网络数据分析服务的性能参数信息；
    NWDAF网元选择模块，用于根据各NWDAF网元对于所请求的网络数据分析服务的所述性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向所述目标NWDAF网元发送NWDAF业务请求。
  13. 一种网络数据分析功能NWDAF网元的选择装置，包括：
    服务发现请求接收模块，用于接收NWDAF服务请求网元或所述 NWDAF服务请求网元对应的服务通信代理SCP实体发送的NWDAF服务发现请求；
    服务发现响应发送模块，用于基于所述NWDAF服务发现请求向所述NWDAF服务请求网元或所述NWDAF服务请求网元对应的SCP实体发送NWDAF服务发现响应，以使所述NWDAF服务请求网元或所述NWDAF服务请求网元对应的SCP实体根据所述NWDAF服务发现响应中所包含的各NWDAF网元对于所请求的网络数据分析服务的性能参数信息，选择用于提供所请求的网络数据分析服务的目标NWDAF网元，并向所述目标NWDAF网元发送NWDAF业务请求。
  14. 一种电子设备，包括存储器和处理器；
    所述存储器中存储有计算机程序；
    所述处理器，用于执行所述计算机程序以实现权利要求1至11中的任一项所述的方法。
  15. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现权利要求1至11中的任一项所述的方法。
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