CN113709789A

CN113709789A - Method for acquiring terminal measurement data, and method and device for reporting measurement data

Info

Publication number: CN113709789A
Application number: CN202010437438.1A
Authority: CN
Inventors: 李琴; 王丹
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-11-26

Abstract

The embodiment of the invention provides a method for acquiring terminal measurement data, a method and a device for reporting the measurement data, wherein the method on an NWDAF side comprises the following steps: the NWDAF acquires User Plane Function (UPF) information corresponding to the terminal and information of a Protocol Data Unit (PDU) session established between the terminal and the UPF; the NWDAF subscribes to measurement data of the UPF terminals based on the PDU sessions. The scheme of the invention enables the network side to collect the terminal measurement data timely and efficiently and is used for analyzing and optimizing the service quality.

Description

Method for acquiring terminal measurement data, and method and device for reporting measurement data

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for acquiring measurement data of a terminal, and a method and an apparatus for reporting the measurement data.

Background

Quality of Service (QoS)/Quality of Experience (QoE) measurement data of a mobile terminal is an important standard reflecting network Quality, and in the existing mechanism, Quality data of these networks or services are generally tested and acquired through a dial-up test tool, and a network side cannot directly acquire the Quality data and perform real-time analysis and optimization based on network conditions.

In the prior art, a Network side can acquire user service experience data from an AF (application server) by performing a Network Exposure Function (NEF), but the mechanism depends on cooperation of a third party AF, and there is no actual application case at present. In addition, in the existing mechanism, the base station may collect wireless measurement signals of some terminals through MDT (Minimization Drive Test). According to the scheme, the measurement report of the MDT is uploaded through the control plane, the wireless measurement data of the terminal can be obtained based on the MDT, but the network performance index KPI and the service quality measurement data are not included, and the efficiency of transmitting the measurement data through the control plane is not as high as that through the user plane.

Disclosure of Invention

The invention provides a method for acquiring terminal measurement data, a method and a device for reporting the measurement data. Therefore, the network side can timely and efficiently collect the terminal measurement data and is used for analyzing and optimizing the service quality.

To solve the above technical problem, an embodiment of the present invention provides the following solutions:

a method for acquiring terminal measurement data, which is applied to a network data analysis function (NWDAF), comprises the following steps:

the NWDAF acquires User Plane Function (UPF) information corresponding to the terminal and information of a Protocol Data Unit (PDU) session established between the terminal and the UPF;

the NWDAF subscribes to measurement data of the UPF terminals based on the PDU sessions.

Optionally, the obtaining, by the NWDAF, user plane function UPF information corresponding to the terminal and information of a protocol data unit PDU session by the NWDAF includes:

the NWDAF sends a subscription request to a Session Management Function (SMF), wherein the subscription request carries: a terminal or a terminal group designated by the NWDAF;

and the NWDAF receives UPF information corresponding to the specified terminal fed back by the SMF and information of at least one Protocol Data Unit (PDU) session established between the specified terminal and the UPF.

Optionally, the method for obtaining terminal measurement data further includes:

the NWDAF selects a default PDU session or randomly selects one PDU session from the at least one PDU session.

Optionally, the measuring data of the NWDAF to the UPF subscribing terminal based on the PDU session includes:

the NWDAF subscribes to measurement data of the terminal directly based on the PDU session; or

And the NWDAF subscribes the measurement data of the terminal to the UPF based on the PDU session through a Session Management Function (SMF).

Optionally, the measuring data directly sent to the UPF subscription terminal by the NWDAF based on the PDU session includes:

the NWDAF sends a first subscription event request directly to the UPF;

and the NWDAF receives the measurement data of the terminal fed back by the UPF, wherein the measurement data are fed back by the UPF through the connection of a transmission layer established between the terminal and the UPF based on the PDU session according to the first subscription event request.

Optionally, the measurement data is measurement data that is fed back by the terminal and is sent to the terminal by the UPF through the PDU session selected by the NWDAF according to the first subscription event request, and is received through a TCP (transmission control protocol) connection established based on the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

Optionally, the measurement data is measurement data that is fed back by the UPF, and dynamically initiates a TCP (transmission control protocol) connection of a transport layer to the terminal according to the first subscription event request and based on the PDU session selected by the NWDAF, and sends the first subscription request to the terminal through the TCP connection, and receives the measurement data fed back by the terminal through the TCP connection; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

when the NWDAF determines that the subscription is required to be canceled, sending a request for canceling the subscription to the UPF; alternatively, the first and second electrodes may be,

in the process of acquiring the measurement data of the terminal, after receiving a release message sent by a Session Management Function (SMF) that a PDU session is released, the NWDAF sends a notification of unsubscribing to the UPF.

Optionally, the measuring data from the NWDAF to the UPF subscriber terminal based on the PDU session through a session management function SMF includes:

the NWDAF initiates a second subscription event request to the SMF;

and the NWDAF receives the measurement data of the terminal fed back by the SMF, wherein the measurement data is fed back by the SMF through the UPF, the terminal and the UPF based on the PDU session according to the second subscription event request.

Optionally, the measurement data is measurement data that is fed back by the terminal and received by the SMF through a TCP connection established based on the selected PDU session, where the SMF sends a second subscription request to the UPF according to the second subscription event request, and the UPF sends the third subscription request to the terminal through the PDU session selected by the NWDAF; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

when the NWDAF determines to cancel subscription, sending a request for canceling subscription to the SMF; alternatively, the first and second electrodes may be,

in the process of acquiring the measurement data of the terminal, after receiving a release message that the PDU session sent by the SMF is released, the NWDAF sends a unsubscribe request to the SMF, and the SMF sends a unsubscribe notification to the UPF.

The embodiment of the invention also provides a method for acquiring the terminal measurement data, which is applied to the user plane function UPF and comprises the following steps:

the UPF receives a subscription event request, wherein the subscription event request is used for feeding back measurement data of a terminal specified by a network data analysis function (NWDAF) to the NWDAF;

the UPF acquires the measurement data of the appointed terminal according to the subscription event request;

the UPF feeds back the measurement data to the NWDAF.

Optionally, the obtaining, by the UPF, measurement data of the specified terminal according to the subscription event request includes:

the UPF receives a first subscription event request sent by the NWDAF;

and the UPF acquires the measurement data of the appointed terminal through the connection between the terminal and the UPF according to the first subscription event request.

Optionally, the obtaining, by the UPF according to the first subscription event request, measurement data of the designated terminal through connection between the terminal and the UPF includes:

and the UPF acquires the measurement data of the appointed terminal through a Protocol Data Unit (PDU) session between the terminal selected by the NWDAF and the UPF and the connection of a transmission layer established based on the PDU session according to the first subscription event request.

Optionally, the obtaining, by the UPF, measurement data of a specified terminal according to the first subscription event request, through the PDU session selected by the NWDAF and a connection of a transport layer established based on the PDU session, includes:

the UPF sends a first subscription request to a terminal through the PDU session selected by the NWDAF according to the first subscription event request;

the UPF establishes a Transmission Control Protocol (TCP) connection based on the PDU session and receives measurement data fed back by a specified terminal through the TCP connection; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

and the UPF receives the measurement data fed back by the appointed terminal through the PDU session between the terminal selected by the NWDAF and the UPF and the connection of the transmission layer dynamically established based on the PDU session according to the first subscription event request.

Optionally, the receiving, by the UPF according to the first subscription event request, measurement data fed back by the designated terminal through the PDU session between the terminal selected by the NWDAF and the UPF and the transport layer connection dynamically established based on the PDU session includes:

the UPF dynamically initiates a Transmission Control Protocol (TCP) connection to the terminal based on the PDU session between the terminal selected by the NWDAF and the UPF according to the first subscription event request, and sends a first subscription request to the terminal through the TCP connection;

the UPF receives the measurement data fed back by the appointed terminal through the TCP connection; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

if a subscription cancellation request sent by the NWDAF is received, sending a subscription cancellation notification to a terminal; alternatively, the first and second electrodes may be,

and in the process of feeding back the measurement data to the NWDAF, sending a notification of unsubscribing to a terminal if a unsubscribing request sent by the NWDAF after receiving a release message sent by a Session Management Function (SMF) that the PDU session is released is received.

and the UPF acquires the measurement data of the appointed terminal through the connection between the terminal and the UPF according to a second subscription event request sent to the SMF by the NWDAF.

Optionally, the obtaining, by the UPF, measurement data of the specified terminal through a connection between the terminal and the UPF according to the second subscription event request sent by the NWDAF to the SMF includes:

and the UPF receives the measurement data fed back by the appointed terminal through the PDU session selected by the NWDAF and the connection of the transmission layer established based on the PDU session according to a second subscription event request sent to the SMF by the NWDAF.

Optionally, the receiving, by the UPF, measurement data fed back by the designated terminal according to the second subscription event request sent by the NWDAF to the SMF, through the PDU session selected by the NWDAF and the connection of the transport layer established based on the PDU session, includes:

receiving a second subscription request sent by the SMF, where the second subscription request is sent by the SMF after receiving the second subscription event request sent by the NWDAF;

sending the third subscription request to a terminal through the PDU session selected by the NWDAF, and receiving measurement data fed back by a specified terminal through a Transmission Control Protocol (TCP) connection established based on the PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

if receiving the request of canceling the subscription sent by the SMF, sending a notification of canceling the subscription to the terminal; alternatively, the first and second electrodes may be,

and in the process of feeding back the measurement data to the NWDAF, if a unsubscribe request sent by the SMF is received, sending a notification of unsubscribing to a terminal, wherein the unsubscribe request sent by the SMF is sent after a unsubscribe request sent by the NWDAF is received after a release message that the SMF feeds back the PDU session to the NWDAF is released.

The embodiment of the invention also provides a method for reporting the measurement data, which is applied to the terminal and comprises the following steps:

receiving a subscription request sent by a user plane function UPF;

collecting measurement data according to the subscription request;

and sending the measurement data to a network data analysis function (NWDAF) through the UPF.

Optionally, receiving a subscription request sent by a user plane function UPF includes:

and receiving a subscription request sent by the UPF through the connection between the terminal and the UPF.

Optionally, receiving a subscription request sent by the UPF through a connection between the terminal and the UPF, including

Receiving a subscription request sent by the UPF through a Protocol Data Unit (PDU) session selected by the NWDAF; alternatively, the first and second electrodes may be,

and receiving a subscription request sent by the UPF through a Transmission Control Protocol (TCP) connection dynamically established on the basis of the PDU session selected by the NWDAF.

Optionally, sending the measurement data to a network data analysis function NWDAF through the UPF includes:

sending the measurement data to the UPF through a Transmission Control Protocol (TCP) connection established between a terminal and the UPF based on the PDU session, and sending the measurement data to a network data analysis function (NWDAF) through a notification message by the UPF; alternatively, the first and second electrodes may be,

and sending the measurement data to the UPF through a Transmission Control Protocol (TCP) connection dynamically established on the basis of the PDU session between the terminal and the UPF, and sending the measurement data to a network data analysis function (NWDAF) through a notification message by the UPF.

The embodiment of the present invention further provides a device for acquiring terminal measurement data, which is applied to a network data analysis function NWDAF, and the device includes:

the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring User Plane Function (UPF) information corresponding to a terminal and information of a Protocol Data Unit (PDU) session established between the terminal and the UPF;

and the processing module is used for measuring data from the UPF subscription terminal based on the PDU session.

The embodiment of the present invention further provides a network data analysis functional entity, including:

the terminal comprises a transceiver, a Protocol Data Unit (PDU) session establishing module and a control module, wherein the transceiver is used for acquiring User Plane Function (UPF) information corresponding to the terminal and information of the PDU session established between the terminal and the UPF;

a processor for measuring data to the UPF subscribing terminal based on the PDU session.

The embodiment of the invention also provides a device for acquiring the terminal measurement data, which is applied to the user plane function UPF, and the device comprises:

a transceiver module, configured to receive a subscription event request, where the subscription event request is used to feed back measurement data of a terminal specified by a network data analysis function NWDAF to the NWDAF;

the processing module is used for acquiring the measurement data of the appointed terminal according to the subscription event request;

the transceiver module is further configured to feed back the measurement data to the NWDAF.

The embodiment of the present invention further provides a user plane functional entity, including:

a transceiver, configured to receive a subscription event request, where the subscription event request is used to feed back measurement data of a terminal specified by a network data analysis function NWDAF to the NWDAF;

the processor is used for acquiring the measurement data of the appointed terminal according to the subscription event request;

the transceiver is further configured to feed back the measurement data to the NWDAF.

The embodiment of the invention also provides a device for reporting the measurement data, which is applied to a terminal, and the device comprises:

the receiving and sending module is used for receiving a subscription request sent by a user plane function UPF;

the processing module is used for collecting the measurement data according to the subscription request;

the transceiver module is further configured to send the measurement data to a network data analysis function NWDAF through the UPF.

An embodiment of the present invention further provides a terminal, including:

the system comprises a transceiver and a user plane function UPF, wherein the transceiver is used for receiving a subscription request sent by the user plane function UPF;

the processor is used for collecting measurement data according to the subscription request;

the transceiver is further configured to send the measurement data to a network data analysis function NWDAF via the UPF.

An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.

Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

The scheme of the invention at least comprises the following beneficial effects:

according to the scheme of the invention, User Plane Function (UPF) information corresponding to a terminal and Protocol Data Unit (PDU) session information established between the terminal and the UPF are obtained through the NWDAF; the NWDAF subscribes to measurement data of the UPF terminals based on the PDU sessions. The network can dynamically master the network or service quality data perceived from the user side in time by collecting UE measurement data in real time and in a customized manner through NWDAF, so that the adjustment and optimization of the network side become possible.

Drawings

Fig. 1 is a flowchart of a method of acquiring terminal measurement data on an NWDAF side;

fig. 2 is a schematic diagram of a static subscription mode in a method for acquiring terminal measurement data at an NWDAF side;

FIG. 3 is a flowchart of an embodiment of a method for obtaining terminal measurement data at the NWDAF side;

fig. 4 is a schematic diagram of a terminal reporting measurement data in a method for acquiring measurement data of the terminal at an NWDAF side;

fig. 5 is a gRPC protocol layer diagram;

fig. 6 is a schematic diagram of an architecture of a dynamic subscription mode in a method for acquiring terminal measurement data at an NWDAF side;

FIG. 7 is a flowchart of another embodiment of a method for obtaining terminal measurement data on the NWDAF side;

FIG. 8 is a flowchart of another implementation of obtaining terminal measurement data on the NWDAF side;

fig. 9 is a schematic flow chart of a method for acquiring terminal measurement data at a UPF side;

fig. 10 is a flowchart illustrating a method for reporting measurement data at a terminal side.

Detailed Description

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

As shown in fig. 1, an embodiment of the present invention provides a method for acquiring terminal measurement data, which is applied to a network data analysis function NWDAF, and the method includes:

step 11, the NWDAF acquires User Plane Function (UPF) information corresponding to the terminal and information of a Protocol Data Unit (PDU) session established between the terminal and the UPF;

and 12, the NWDAF performs measurement data to the UPF subscription terminal based on the PDU session.

In this embodiment, the information of the user plane function UPF corresponding to the terminal and the information of the protocol data unit PDU session established between the terminal and the UPF are obtained through the NWDAF; the NWDAF subscribes to measurement data of the UPF terminals based on the PDU sessions. The network can dynamically master the network or service quality data perceived from the user side in time by collecting UE measurement data in real time and in a customized manner through NWDAF, so that the adjustment and optimization of the network side become possible.

In an alternative embodiment of the present invention, step 11 may include:

step 111, the NWDAF sends a subscription request to a session management function SMF, where the subscription request carries: a terminal or a terminal group designated by the NWDAF;

and step 112, the NWDAF receives the UPF information corresponding to the specified terminal fed back by the SMF and information of at least one protocol data unit PDU session established between the specified terminal and the UPF.

Further, optionally, the method for obtaining the terminal measurement data may further include:

step 113, the NWDAF receives information of at least one data connection between the specified terminal and the application layer established by the UPF, which is fed back by the SMF;

step 114, the NWDAF selects a default PDU session or randomly selects one PDU session from the at least one PDU session.

In specific implementation, the NWDAF determines an object to be acquired, including an acquired terminal (UE) or a terminal group, and an acquired application identifier (application ID), according to the acquisition requirement of data.

The NWDAF sends a subscription request (Nsmf _ evendexposure _ Subscribe) to the SMF, requests to acquire information of at least one PDU session corresponding to the UE or the UE group, and a release reporting event of the PDU session.

And the SMF reports the UPF and PDU session information to the NWDAF.

The NWDAF preferentially selects a default PDU session and its corresponding UPF as a channel for subsequent data transmission, and if there is no default PDU session, randomly selects one from the multiple PDU sessions.

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

in a first implementation manner, step 121, the NWDAF directly sends measurement data to the UPF subscriber terminal based on the PDU session; alternatively, the first and second electrodes may be,

in a second implementation manner, step 122, the NWDAF subscribes, through a session management function SMF, to measurement data of the UPF subscriber terminal based on the PDU session.

In a first implementation manner, step 121 may include:

step 1211, the NWDAF sending a first subscription event request directly to the UPF;

optionally, the first subscription event request includes at least one of: an identification of a subscription event; a destination address of the first subscription event request; event reporting information; event filtering information; wherein the event report information includes: the method comprises the steps that a specified terminal or terminal group, service quality measurement data collected by the terminal or terminal group and/or experience quality data of specified application are/is obtained; the event filtering information includes: a designated terminal or designated terminal group information.

Step 1212, the NWDAF receives measurement data of the terminal fed back by the UPF, where the measurement data is fed back by the UPF through a connection of a transport layer established between the terminal and the UPF based on the PDU session according to the first subscription event request.

In a first implementation manner of this step 1212, specifically, the NWDAF receives the UPF, sends a first subscription request to the terminal through the PDU session selected by the NWDAF according to the first subscription event request, and receives measurement data fed back by the terminal through a transmission control protocol TCP connection established based on the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

It should be noted that, in the embodiment of the present invention, both the subscription event request and the subscription request include at least one of the following items: an identification of a subscription event; a destination address of the subscription request; event reporting information; event filtering information; wherein the event report information includes: the method comprises the steps that a specified terminal or terminal group, service quality measurement data collected by the terminal or terminal group and/or experience quality data of specified application are/is obtained; the event filtering information includes: a designated terminal or designated terminal group information.

The following describes a specific implementation flow of the above embodiment with reference to fig. 2 to 5:

step 1-3, interacting the NWDAF and the SMF, and acquiring UPF connected with a terminal needing to be subscribed and corresponding PDU session information;

and 4, the NWDAF subscribes an Event request to the initiating UPF through Nnf _ EventExposition _ Subscribe, wherein the message parameters comprise a necessary parameter NF ID, an Event identifier (Event ID (s)), a Notification destination Address (Notification Target Address), Event Reporting Information (Event Reporting Information) and Event filtering Information (Event Filter Information). The Event Reporting Information is the QoS data such as time delay/jitter/packet loss, the QoE data of the specified application ID and the sampling period of the specified terminal or the specified application and the network and service quality measurement data collected by the specified terminal or the specified application. Event Filter Information is Information of UE or UE group needing to be collected.

And 5, returning a request response to the NWDAF by the UPF after receiving the subscription request.

And 6, the UPF sends a subscription configuration request to the UE through the specified existing PDU session. The request message may adopt an HTTP or HTTPs mode, and the message content includes an IP (here, an IP of a UPF) of a telemetry collector (telemetric collector), a subscription rule (data that needs to be reported by the UE, for example, QoS data such as delay/jitter/packet loss, and QoE data of a specified application ID), a sampling period, a used transmission protocol and a coding mode, and the like. The UE is required to actively release this subscription configuration after the current PDU session is released.

And 7-9, the UE serves as a telemetering agent, feeds back a subscription response to the UPF after receiving the subscription request, and starts related information acquisition work. The UE collecting related measurement data and method may include: (1) and measuring QoS data such as network delay/jitter/packet loss and the like by using a measuring tool installed on the UE based on a UPF (unified power flow) configured sampling period and data requirements to obtain measured data. (2) Based on the application ID configured by the UPF and the service experience data acquisition requirement thereof, relevant service experience data is collected by using a built-in Software Development Kit (SDK), and service dial test and service experience index measurement can be performed on the application of the specified application ID by using a service dial test and evaluation tool installed on the UE to obtain the relevant service experience data.

And step 10, when the data reporting condition is met, the UE initiates the establishment of TCP connection to UPF (uplink packet radio) which is a collector. And the UE encapsulates the acquired measurement data by using a GRPC protocol and pushes the data to the acquisition unit UPF from the UE. The interactive flow of the DATA reporting message is shown in fig. 4, and the gRPC protocol is layered and shown in fig. 5, wherein DATA refers to DATA collected by the UE. The meaning of the fields shown in fig. 5 is as follows:

DATA: the data models of both communication parties are based on service definition and generally adopt a YANG model;

proto Buffer: the data transmitted by the GRPC is coded in a GPB format;

gRPC: remote procedure call, which defines the protocol interaction format of the remote procedure call;

HTTP 2: the GRPC is carried on the HTTP2 protocol, and utilizes the characteristics of bidirectional flow, flow control, header compression, multiplexing request on single connection and the like of the HTTP 2;

TCP: the underlying communication protocol is based on TCP connections.

And step 11, after receiving the collected data pushed by the UE, the UPF correspondingly reports the collected data of the UE to the NWDAF by using an Nnf _ EventExposure _ Notify message.

In an optional embodiment of the present invention, the method for obtaining terminal measurement data may further include:

step 13, when the NWDAF determines to unsubscribe, sending a unsubscribe request to the UPF; alternatively, the first and second electrodes may be,

and step 14, in the process of acquiring the measurement data of the terminal, after receiving a release message sent by the session management function SMF that the PDU session is released, sending a notification of unsubscribing to the UPF.

Specifically, the implementation of step 13 is shown in fig. 3:

and step 12, when the NWDAF needs to finish data collection, the NWDAF sends a UnSubscribe request Nnf _ EventExposure _ UnSubscribe to the UPF.

And step 13, after receiving the subscription canceling request, the UPF sends a subscription canceling request UnSubscribe to the UE.

And step 14, the UE returns a unsubscribe response and deletes the acquisition related configuration.

And step 15, the UPF returns a unsubscribe response to the NWDAF.

And step 16, the NWDAF sends a message of unsubscribing Nsmf _ EventExposure _ UnSubscribe to the SMF.

And step 17, the SMF returns a unsubscribe response to the NWDAF.

Specifically, the implementation of step 14 is shown in fig. 3:

and 18, when the PDU session is released during data collection, the SMF reports the Nsmf _ EventExposure _ Notify to the NWDAF and informs the PDU session release event.

And 19, after receiving the PDU session release message, the NWDAF issues a unsubscribe to the UPF.

Step 20, the UPF feeds back a unsubscribe response to the NWDAF;

step 21, the NWDAF issues a unsubscribe to the SMF;

and 22, the SMF feeds back a unsubscribe response to the NWDAF.

It should be noted that: the NWDAF determines whether to continuously inquire the information of the PDU session of the specified user or user group from the SMF through the Nsmf _ PDUSESIS _ SMContextStatus describe according to the self requirement. When the user or the user group is inquired that other PDU sessions exist, the subscription request can be continuously carried out according to the new PDU session, and the steps are the same as the above process.

In a second implementation manner of this step 1212, specifically, the following may be performed:

and the NWDAF receives the measurement data collected by the terminal and fed back by the UPF according to the first subscription event request based on the connection of the transmission layer dynamically established by the PDU session selected by the NWDAF.

Further, the step may include: the NWDAF receives measurement data of the terminal fed back by the UPF, wherein the measurement data are Transmission Control Protocol (TCP) connections of a transmission layer dynamically initiated to the terminal by the UPF according to the first subscription event request and based on the PDU session selected by the NWDAF, the first subscription request is sent to the terminal through the TCP connections, and the measurement data fed back by the terminal are received through the TCP connections; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

As shown in fig. 6 and fig. 7, a specific flow of the second implementation manner of the step 1212 includes:

step 1-3: the NWDAF interacts with the SMF to acquire UPF connected with the terminal needing subscription and corresponding PDU session information;

and 4, subscribing data such as network and service quality of a specified user or a specified application, such as QoS data such as time delay/jitter/packet loss and QoE data of a specified application ID (identity) to the UPF by the NWDAF.

And 5, after receiving the subscription request, the UPF initiates the establishment of TCP connection to the corresponding UE.

Step 6, the UPF initiates a subscription request to the UE based on a telemetric mechanism on the newly established TCP connection, where the request content includes an IP of a telemetry collector selector (here, the IP of the UPF), a subscription rule (data to be pushed, such as QoS data of delay/jitter/packet loss, etc., and QoE data of a specified application ID), a sampling period, a used transmission protocol and a coding method, etc.

And 7, the UE serves as a telemetering agent and starts related information acquisition work after receiving the subscription request. The UE collecting related measurement data and method may include: (1) and measuring QoS data such as network delay/jitter/packet loss and the like by using a measuring tool installed on the UE based on a UPF (unified power flow) configured sampling period and data requirements to obtain measured data. (2) Based on the application ID configured by UPF and the service experience data acquisition requirement thereof, relevant service experience data is collected through the SDK built in the APP, and service dial testing and service experience index measurement can also be carried out on the application of the specified application ID through a service dial testing and evaluation tool installed on the UE, so that the relevant service experience data is obtained.

And 8, the UE encapsulates the acquired measurement data by adopting a GRPC protocol and pushes the data to a collector UPF from the UE. The interactive flow of the data reporting message is shown in figure 4, and the gPRC protocol layer is shown in figure 5.

And 9, after receiving the collected data pushed by the UE, the UPF correspondingly reports the collected data of the UE to the NWDAF by using an Nnf _ EventExposure _ Notify message.

step 13, after acquiring the measurement data of the terminal, sending a request for canceling subscription to the UPF; or, in the step 14, in the process of acquiring the measurement data of the terminal, after receiving a release message that the PDU session sent by the session management function SMF is released, sending a notification of unsubscribing to the UPF.

Specifically, step 13 is implemented as follows:

And step 15, the UPF returns a unsubscribe response to the NWDAF.

And step 17, the SMF returns a unsubscribe response to the NWDAF.

Specifically, step 14 is implemented as follows:

and 18, when the PDU session connection is released during data collection, the SMF reports the Nsmf _ EventExposure _ Notify to the NWDAF and informs the PDU session release event.

Step 20, the UPF feeds back a unsubscribe response to the NWDAF;

step 21, the NWDAF issues a unsubscribe to the SMF;

and 22, the SMF feeds back a unsubscribe response to the NWDAF.

It should be noted that the NWDAF determines whether to continue to query the SMF for PDU session information of a specific user or user group through the Nsmf _ PDU usage _ SMcontextStatus describe according to its own needs. When the user or the user group is inquired that other PDU sessions exist, the subscription request can be continuously carried out according to the new PDU session, and the steps are the same as the above process.

In a second implementation, step 122 may include:

step 1221, the NWDAF initiating a second subscription event request to the SMF;

step 1222, the NWDAF receives the measurement data of the terminal fed back by the SMF, where the measurement data is fed back by the SMF according to the second subscription event request through the UPF, the connection established between the terminal and the UPF based on the PDU session.

Specifically, the step may include:

the NWDAF receives the measurement data of the terminal fed back by the SMF, the SMF sends a second subscription request to the UPF according to the second subscription event request, sends a second subscription request to the UPF, sends a third subscription request to the terminal through the PDU session selected by the UPF through the NWDAF, and receives the measurement data fed back by the terminal through a Transmission Control Protocol (TCP) connection established based on the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

The specific flow of this embodiment is shown in fig. 8, and includes:

step 1-3, subscribing a terminal data collection requirement to the UPF by the NWDAF through the SMF;

and 4, the NWDAF initiates a subscription request Nsmf _ EventExposure _ Subscribe to the SMF according to the PDU session and the UPF information of the UE determined in the last step, requests the PDU session appointed to the appointed UPF, and issues network measurement data acquisition requirements to the IP of the appointed user or user group, such as QoS data of time delay/jitter/packet loss and the like, QoE measurement data of the appointed application ID and a sampling period.

And 5, the SMF returns a request response after receiving the subscription request.

And 6, the SMF initiates a Session Modification Request (Session Modification Request) to the UPF, and requests to issue a network measurement data acquisition Request to an IP (Internet protocol) of a specified user or user group in a specified PDU (protocol data Unit) Session, such as QoS (quality of service) data such as time delay/jitter/packet loss, QoE (quality of experience) measurement data of a specified application ID (identity), and a sampling period.

Step 7.UPF replies to the Session Modification Response (Session Modification Response).

And 8, the UPF sends a subscription configuration request to the UE in the specified PDU session according to the request of the SMF. The request message may use an HTTP or HTTPs mode, and the message content includes an IP of the telemetry collector (here, an IP of the UPF), a subscription rule (data that needs to be reported by the UE, such as QoS data such as delay/jitter/packet loss, QoE data of the specified application ID), a sampling period, a used transmission protocol and a coding mode, and the like. The UE is required to actively release this subscription configuration after the current PDU session is released.

And 9-10, the processes of issuing subscription configuration to the UE by the UPF and reporting the acquired data to the UPF by the UE are the same as the processes shown in the figure 4.

And 11, reporting the data collected by the UE to the SMF by the UPF through the N4 Session Report.

And 12, the SMF replies a Session Report ACK.

And step 13, the SMF reports the side data collected by the UE to the NWDAF through the Nsmf _ EventExposure _ Notify.

step 15, when the NWDAF determines to unsubscribe, sending a unsubscribe request to the SMF; alternatively, the first and second electrodes may be,

step 16, in the process of acquiring the measurement data of the terminal, after receiving the release message that the PDU session sent by the SMF is released, the NWDAF sends a unsubscribe request to the SMF, and the SMF sends a unsubscribe notification to the UPF.

The specific implementation of step 15 is shown in fig. 8, and includes:

and step 20, when the NWDAF needs to finish data collection, the NWDAF sends a UnSubscribe request Nsmf _ EventExposure _ UnSubscribe to the SMF.

And step 21, after receiving the message of canceling subscription, the SMF sends a Session Modification Request (Session Modification Request) to the UPF, and cancels the collection of the measurement data of the UE. After receiving the message of canceling subscription, the UPF sends the message of canceling subscription to the UE; after receiving the message of canceling subscription, the UE deletes the local acquisition configuration file and returns a response of canceling subscription to the UPF; after receiving the unsubscribe Response, the UPF deletes the local related configuration and sends a Session Modification Response (Session Modification Response) to the SMF; after receiving the Session Modification Response, the SMF sends a UnSubscribe Response Nsmf _ EventExposure _ UnSubscribe Response to the NWDAF; the NWDAF sends a request for canceling the subscription PDU session to the SMF; the SMF replies with a unsubscribe response.

The specific implementation of step 16 is shown in fig. 8, and includes:

and step 22, when the PDU session is released during data collection, the SMF reports the Nsmf _ EventExposure _ Notify to the NWDAF and notifies the PDU session release event.

And 23, after the NWDAF receives the PDU session release message, the NWDAF issues a subscription cancellation to the SMF. The NWDAF issues a UnSubscribe Nsmf _ EventExposure _ unsubscript to the SMF.

And 24, after receiving the message of canceling the subscription, the SMF issues an N4 Session Modification Request to the UPF to cancel the message collection of the UE.

Step 25, after receiving the Session Modification Request, the UPF deletes the local relevant configuration and responds to the SMF with an N4 Session Modification Response;

and step 26, after receiving the Session Modification Response of the UPF, the SMF sends a UnSubscribe Response Nsmf _ EventExposure _ UnSubscribe Response to the NWDAF.

In the embodiment of the invention, the network analysis function NWDAF acquires the UE data in real time and in a customized manner, and the network can timely and dynamically master the network or service quality data perceived from the user side, so that the adjustment and optimization of the network side become possible. In the scheme, a telmentary (remote measurement or remote measurement) mechanism is adopted to carry out data acquisition configuration and report on a user plane, and the scheme has the following advantages: by subscribing tasks and reporting the tasks in a pushing mode, the data acquisition performance with high efficiency and real time (second-level support) is realized. The data is encoded in a GPB format and uploaded to a collector through a GRPC protocol, so that high-speed collection and low bandwidth of the data can be realized.

As shown in fig. 9, an embodiment of the present invention further provides a method for acquiring terminal measurement data, which is applied to a user plane function UPF, where the method includes:

step 91, the UPF receives a subscription event request, where the subscription event request is used to feed back measurement data of a terminal specified by a network data analysis function NWDAF to the NWDAF;

step 92, the UPF acquires the measurement data of the appointed terminal according to the subscription event request;

step 93, the UPF feeds back the measurement data to the NWDAF.

The UPF obtains the measurement data of the designated terminal according to the subscription event request, including:

the UPF receives a first subscription event request sent by the NWDAF;

the UPF establishes a Transmission Control Protocol (TCP) connection based on the PDU session and receives measurement data fed back by a specified terminal through the TCP connection; the measurement data comprises at least one of: measurement data of service quality, quality of experience data of appointed application;

correspondingly, the UPF feeds back the measurement data acquired by the terminal to the NWDAF, and specifically, the UPF feeds back the measurement data acquired by the terminal to the NWDAF through a notification message (Notify).

the UPF dynamically initiates a Transmission Control Protocol (TCP) connection to the terminal based on the PDU session between the terminal selected by the NWDAF and the UPF according to the first subscription event request, and sends a first subscription request to a specified terminal through the TCP connection;

Optionally, the method for obtaining the terminal measurement data may further include:

Optionally, the receiving, by the UPF, measurement data fed back by the designated terminal through the PDU session selected by the NWDAF and the connection of the transport layer established based on the PDU session according to the second subscription event request sent by the NWDAF to the SMF by the UPF includes:

sending the third subscription request to a terminal through the PDU session selected by the NWDAF, and receiving measurement data fed back by the specified terminal through a Transmission Control Protocol (TCP) connection established based on the PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

The optional method for acquiring the terminal measurement data may further include:

It should be noted that the method in this embodiment is a method on the UPF side corresponding to the method in the above embodiment, and all the implementation manners in the above embodiments are applicable to this embodiment, and the same technical effects can be achieved.

As shown in fig. 10, an embodiment of the present invention further provides a method for reporting measurement data, which is applied to a terminal, and the method includes:

step 101, receiving a subscription request sent by a user plane function UPF;

step 102, collecting measurement data according to the subscription request;

and 103, sending the measurement data to a network data analysis function NWDAF through the UPF.

It should be noted that the method in this embodiment is a method on the terminal side corresponding to the method in the above embodiment, and all the implementations in the above embodiments are applicable to this embodiment, and the same technical effects can be achieved.

Optionally, the obtaining module is specifically configured to:

sending a subscription request to a Session Management Function (SMF), wherein the subscription request carries: a terminal or a terminal group designated by the NWDAF;

and receiving UPF information corresponding to the appointed terminal fed back by the SMF and information of at least one Protocol Data Unit (PDU) session established between the appointed terminal and the UPF.

Optionally, the obtaining module is further configured to: selecting a default PDU session or randomly selecting one PDU session from the at least one PDU session.

Optionally, the processing module is specifically configured to:

measuring data directly to the UPF subscription terminal based on the PDU session; or

And subscribing the measurement data of the terminal to the UPF based on the PDU session through a Session Management Function (SMF).

Optionally, the measuring data directly sent to the UPF direct subscription terminal based on the PDU session includes:

directly sending a first subscription event request to the UPF;

and receiving the measurement data of the terminal fed back by the UPF, wherein the measurement data is fed back by the UPF through the connection of a transmission layer established between the terminal and the UPF based on the PDU session according to the first subscription event request.

Optionally, the measurement data is measurement data that is fed back by the terminal and is sent to the terminal by the UPF through the selected PDU session according to the first subscription event request, and is received through a TCP (transmission control protocol) connection established based on the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

Optionally, the measurement data is measurement data that is fed back by the UPF, which dynamically initiates a transmission control protocol TCP connection of a transport layer to the terminal based on the selected PDU session according to the first subscription event request, sends the first subscription request to the terminal through the TCP connection, and receives the measurement data fed back by the terminal through the TCP connection; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

Optionally, the processing module is further configured to send a subscription cancellation request to the UPF when it is determined that the subscription cancellation is required; or, in the process of acquiring the measurement data of the terminal, after receiving a release message sent by the session management function SMF that the PDU session is released, sending a notification of unsubscribing to the UPF.

Optionally, the measuring data sent to the UPF subscription terminal based on the PDU session through a session management function SMF includes:

initiating a second subscription event request to the SMF;

and receiving the measurement data of the terminal fed back by the SMF, wherein the measurement data is the connection feedback of a transmission layer established by the SMF according to the second subscription event request and based on the PDU session between the UPF and the terminal.

Optionally, the measurement data is measurement data that is fed back by the terminal and received by the SMF through a TCP (transmission control protocol) connection established based on the selected PDU session, where the SMF sends a second subscription request to the UPF according to the second subscription event request, and the UPF sends the third subscription request to the terminal through the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

Optionally, the processing module is further configured to send a unsubscribe request to the SMF when determining to unsubscribe; alternatively, the first and second electrodes may be,

in the process of acquiring the measurement data of the terminal, after receiving a release message sent by the SMF and releasing the PDU session, sending a subscription cancellation request to the SMF, and sending a subscription cancellation notice to the UPF by the SMF.

It should be noted that the same method embodiments as described above are also applicable to this embodiment, and the same technical effects can be achieved.

Optionally, the transceiver is specifically configured to: sending a subscription request to a Session Management Function (SMF), wherein the subscription request carries: a terminal or a terminal group designated by the NWDAF;

Optionally, the transceiver is further configured to: selecting a default PDU session or randomly selecting one PDU session from the at least one PDU session.

Optionally, the processor is specifically configured to: measuring data directly to the UPF direct subscription terminal based on the PDU session; or

directly sending a first subscription event request to the UPF;

Optionally, the processor is further configured to: when the subscription cancellation is determined to be needed, sending a subscription cancellation request to the UPF; alternatively, the first and second electrodes may be,

and in the process of acquiring the measurement data of the terminal, after receiving a release message sent by a Session Management Function (SMF) and released by a PDU session, sending a subscription cancellation notice to the UPF.

initiating a second subscription event request to the SMF;

Optionally, the processor is further configured to:

when determining to cancel the subscription, sending a request for canceling the subscription to the SMF; alternatively, the first and second electrodes may be,

Optionally, obtaining measurement data of the designated terminal according to the subscription event request includes:

receiving a first subscription event request sent by the NWDAF;

and acquiring the measurement data of the appointed terminal through the connection between the terminal and the UPF according to the first subscription event request.

Optionally, acquiring measurement data of a specified terminal through connection between the terminal and the UPF according to the first subscription event request includes:

and acquiring the measurement data of the appointed terminal through a Protocol Data Unit (PDU) session between the terminal selected by the NWDAF and the UPF and the connection of a transmission layer established based on the PDU session according to the first subscription event request.

Optionally, obtaining measurement data of a specified terminal through the PDU session connection selected by the NWDAF and the connection of the transport layer established based on the PDU session according to the first subscription event request includes:

according to the first subscription event request, sending a first subscription request to a terminal through the PDU session selected by the NWDAF;

receiving measurement data fed back by a specified terminal by establishing a Transmission Control Protocol (TCP) connection based on the PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

and receiving measurement data fed back by the appointed terminal through the PDU session between the terminal selected by the NWDAF and the UPF and the connection of the transmission layer dynamically established based on the PDU session according to the first subscription event request.

Optionally, receiving, according to the first subscription event request, measurement data fed back by a designated terminal through a PDU session between the terminal selected by the NWDAF and a UPF and a transport layer connection dynamically established based on the PDU session, where the receiving includes:

according to the first subscription event request, dynamically initiating a Transmission Control Protocol (TCP) connection to the terminal based on the PDU session between the terminal selected by the NWDAF and the UPF, and sending a first subscription request to the terminal through the TCP connection;

receiving measurement data fed back by a specified terminal through the TCP connection; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

Optionally, the transceiver module is further used for

and acquiring the measurement data of the appointed terminal through the connection between the terminal and the UPF according to a second subscription event request sent to the SMF by the NWDAF.

Optionally, obtaining measurement data of a specified terminal through a connection between the terminal and the UPF according to a second subscription event request sent by the NWDAF to the SMF, where the obtaining includes:

and receiving measurement data fed back by a specified terminal through the PDU session selected by the NWDAF and the connection of the transmission layer established based on the PDU session according to a second subscription event request sent by the NWDAF to the SMF.

Optionally, receiving, by the PDU session selected by the NWDAF and a connection of a transport layer established based on the PDU session according to the second subscription event request sent by the NWDAF to the SMF, measurement data fed back by a specified terminal includes:

Optionally, the transceiver module is further configured to send a notification of unsubscribing to the terminal if receiving the unsubscribe request sent by the SMF; or, in the process of feeding back the measurement data to the NWDAF, if a unsubscribe request sent by the SMF is received, sending a notification of unsubscribing to a terminal, where the unsubscribe request sent by the SMF is sent after a release message that the SMF feeds back the PDU session to the NWDAF is released and the unsubscribe request sent by the NWDAF is received.

It should be noted that all the implementations in the above method embodiments are applicable to the embodiment of the apparatus, and the same technical effects can be achieved.

receiving a first subscription event request sent by the NWDAF;

Optionally, obtaining measurement data of a specified terminal according to the first subscription event request, through the PDU session selected by the NWDAF and a connection of a transport layer established based on the PDU session, includes:

Optionally, the processor is further configured to send a notification of unsubscribing to the terminal if a unsubscribe request sent by the NWDAF is received; alternatively, the first and second electrodes may be,

and receiving measurement data fed back by the terminal through the PDU session selected by the NWDAF and the connection of the transmission layer established based on the PDU session according to a second subscription event request sent by the NWDAF to the SMF.

Optionally, the processor is further configured to send a notification of unsubscribing to the terminal if receiving the unsubscribe request sent by the SMF; or, in the process of feeding back the measurement data to the NWDAF, if a unsubscribe request sent by the SMF is received, sending a notification of unsubscribing to a terminal, where the unsubscribe request sent by the SMF is sent after a release message that the SMF feeds back the PDU session to the NWDAF is released and the unsubscribe request sent by the NWDAF is received.

Optionally, the transceiver module is specifically configured to receive, through connection between the terminal and the UPF, the subscription request sent by the UPF.

Optionally, receiving, through the connection between the terminal and the UPF, the subscription request sent by the UPF includes:

An embodiment of the present invention further provides a terminal, including:

Optionally, the transceiver is specifically configured to receive, through connection between the terminal and the UPF, the subscription request sent by the UPF.

An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. It should be noted that all the implementation manners in the above method embodiments are applicable to the embodiment of the computational network element, and the same technical effect can be achieved.

Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above. It should be noted that all the implementation manners in the above method embodiments are applicable to the embodiment of the computational network element, and the same technical effect can be achieved.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for acquiring terminal measurement data, which is applied to a network data analysis function (NWDAF), and comprises the following steps:

2. The method of claim 1, wherein the NWDAF obtains User Plane Function (UPF) information corresponding to the NWDAF and information of a Protocol Data Unit (PDU) session, and comprises:

3. The method for acquiring terminal measurement data according to claim 2, further comprising:

4. The method of claim 1, wherein the NWDAF obtaining measurement data from the UPF subscribing terminal based on the PDU session comprises:

5. The method of claim 4, wherein the NWDAF directly sends the measurement data of the UPF subscribing terminal based on the PDU session, and comprises:

the NWDAF sends a first subscription event request directly to the UPF;

6. The method of claim 5, wherein the measurement data is measurement data fed back by the UPF sending a first subscription request to the terminal through a PDU session selected by the NWDAF according to the first subscription event request and receiving the measurement data through a TCP connection established based on the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

7. The method according to claim 5, wherein the measurement data is measurement data that the UPF dynamically initiates a transmission control protocol TCP connection of a transport layer to the terminal based on the PDU session selected by the NWDAF according to the first subscription event request, sends a first subscription request to the terminal through the TCP connection, and receives feedback of the terminal through the TCP connection; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

8. The method for acquiring terminal measurement data according to any one of claims 5 to 7, further comprising:

9. The method of claim 4, wherein the NWDAF subscribes to measurement data of the terminal based on the PDU session through a Session Management Function (SMF) and comprises:

the NWDAF initiates a second subscription event request to the SMF;

10. The method of claim 9, wherein the measurement data is measurement data fed back by the SMF, which sends a second subscription request to the UPF according to the second subscription event request, and sends the third subscription request to the terminal through the PDU session selected by the UPF through the NWDAF, and receives the measurement data fed back by the terminal through a TCP connection established based on the selected PDU session; the measurement data comprises at least one of: quality of service measurement data specifying quality of experience data for the application.

11. The method for acquiring terminal measurement data according to claim 9 or 10, further comprising:

12. A method for obtaining terminal measurement data is applied to a User Plane Function (UPF), and the method comprises the following steps:

the UPF feeds back the measurement data to the NWDAF.

13. The method according to claim 12, wherein the UPF obtains the measurement data of the specified terminal according to the subscription event request, and comprises:

the UPF receives a first subscription event request sent by the NWDAF;

14. The method according to claim 13, wherein the UPF obtains the measurement data of the specified terminal through a connection between the terminal and the UPF according to the first subscription event request, and includes:

15. The method of claim 14, wherein the UPF obtains the measurement data of the specific terminal according to the first subscription event request through the NWDAF-selected PDU session and a transport layer connection established based on the PDU session, and comprises:

16. The method according to claim 13, wherein the UPF obtains the measurement data of the specified terminal through a connection between the terminal and the UPF according to the first subscription event request, and includes:

17. The method of claim 16, wherein the UPF receives the measurement data fed back by the specific terminal according to the first subscription event request through a PDU session between the NWDAF-selected terminal and the UPF and a transport layer connection dynamically established based on the PDU session, and comprises:

18. The method for acquiring terminal measurement data according to any one of claims 13 to 17, further comprising:

19. The method according to claim 13, wherein the UPF obtains the measurement data of the specified terminal according to the subscription event request, and comprises:

20. The method of claim 19, wherein the UPF obtains the measurement data of the specified terminal through a connection between the terminal and the UPF according to the second subscription event request sent by the NWDAF to the SMF, and comprises:

21. The method of claim 20, wherein the UPF receives measurement data fed back by the designated terminal via the PDU session selected by the NWDAF and the transport layer connection established based on the PDU session according to the second subscription event request sent by the NWDAF to the SMF, and comprises:

22. The method for acquiring terminal measurement data according to any one of claims 19 to 21, further comprising:

23. A method for reporting measurement data is applied to a terminal, and the method comprises the following steps:

receiving a subscription request sent by a user plane function UPF;

collecting measurement data according to the subscription request;

24. The method of claim 23, wherein receiving a subscription request sent by a User Plane Function (UPF) comprises:

25. A method for reporting measurement data as claimed in claim 24, wherein the receiving of the subscription request sent by the UPF via the connection between the terminal and the UPF includes receiving the subscription request sent by the UPF via the connection between the terminal and the UPF

26. The method of claim 25, wherein sending the measurement data to a network data analysis function NWDAF via the UPF comprises:

27. An apparatus for acquiring terminal measurement data, applied to a network data analysis function NWDAF, the apparatus comprising:

28. A network data analysis function, comprising:

29. An apparatus for acquiring measurement data of a terminal, the apparatus being applied to a User Plane Function (UPF), the apparatus comprising:

30. A user plane functional entity, comprising:

31. A device for reporting measurement data is applied to a terminal, and the device comprises:

32. A terminal, comprising:

33. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any of claims 1 to 11 or 12 to 22 or 23 to 26.

34. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 11 or 12 to 22 or 23 to 26.