Method for determining user plane function and providing information, equipment and medium

A user interface and application function technology, applied in wireless communication, electrical components, etc., can solve problems such as non-optimal solutions, and achieve the effect of ensuring user experience and business performance

Pending Publication Date: 2021-11-02

DATANG MOBILE COMM EQUIP CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0019] The present invention provides a method, device and medium for determining user plane functions and providing information, s...

Method used

[0302] Therefore, the embodiment of the present invention proposes a solution based on the data analysis results of NWDAF to create or modify the user plane data transmission path, so that the UE can access the most suitable edge computing service server through the optimal user plane path, ensuring User business experience.

[0304] During the description, the implementation of the SMF, AF, and NWDAF will be described respectively, and then examples of their coordinated implementation will be given to better understand the implementation of the solutions...

Abstract

The invention discloses a method for determining a user plane function and providing information, equipment and a medium. The method comprises that: after receiving a data analysis request of a session management function and/or an application function about an application, a network data analysis function analyzes application operation data collected from the session management function and the application function to generate a user experience analysis result and/or a performance analysis result containing the location area of the UE, the location of the application and the location of a user plane anchor point, and a corresponding relationship with user experience analysis and/or performance analysis of the application; the data analysis result is provided for the session management function and/or the application function, so that the session management function can optimize the user plane path based on the analysis result; and the application function can adjust the position of the target application based on the analysis result. By adopting the invention, selection of the transmission path and the target service server can be considered from the perspective of user experience or service performance, and the user experience and the service performance are ensured.

Application Domain

TransmissionWireless communication

Technology Topic

Session managementPathPing +6

Image

Examples

Experimental program(5)

Example Embodiment

[0456] Example 1:

[0457] This example illustrates the implementation of user experience analytics where NWDAF collects data and generates EC Application.

[0458] In order to generate a user experience analysis of EC Application deployed on 3GPP network, NWDAF can collect relevant data from SMF and AF.

[0459] Data collected from SMF can include:

[0460]

[0461] Data collected from AF can include:

[0462]

[0463] NWDAF can correlate data collected from SMF with data collected from AF through timestamp and IP filter information. NWDAF uses machine learning algorithms to mine the correlation between data, and the generated data analysis results can include the following:

[0464] indicates that there is an inclusion relationship between these table items)

[0465]

Example Embodiment

[0466] Example 2:

[0467] This example illustrates the implementation of user experience analytics per EC Application provided by NWDAF to SMF.

[0468] The data analysis content provided by NWDAF includes the content in Table 1. In addition, if the SMF requests user experience analysis, the NWDAF may also be required to directly provide Anchor UPF (anchor UPF) recommendation information that can guarantee user experience or service performance.

[0469] Image 6 It is a schematic diagram of the flow of NWDAF providing data analysis results to SMF in Embodiment 2. As shown in the figure, based on the analysis provided by NWDAF, SMF can optimize the user plane path when UE accesses edge computing applications. The flow can be as follows:

[0470] Step 601, PDU Session is established.

[0471] The UE creates a PDU session, and the carried S-NSSAI (Single-Network Slice Selection Assistance Information, Single-Network Slice Selection Assistance Information) and DNN indicate that the PDU session will access the edge network.

[0472] Step 602, the UPF and the SMF perform PFD management (PFD management; PFD: Packet Flow Descriptor, PacketFlow Descriptor).

[0473] In order to determine the optimal path to access the edge network, SMF can have the following methods:

[0474] A. Perform application detection to learn the application accessed by the UE (identified by the application identifier);

[0475] B. Request NWDAF to provide data analysis for accessing edge applications.

[0476] The SMF obtains the PFD of the PDU session from the UDR, and generates a PDR (packet detection rule, Packet Detection Rule) configuration to the UPF. When the SMF configures the PDR, it also requests the UPF to perform application detection, that is, to report the PDR identifier that the data packets transmitted by the UE conform to.

[0477] Step 603, Nnwdaf_AnalyticsSubscription_Subscribe (Nnwdaf_Analytics Subscription Subscription).

[0478] Step 604, Nnwdaf_AnalyticsSubscription_Notify (Nnwdaf_Analytics Subscription Notification).

[0479] If the SMF has not subscribed to the QoE analysis of the edge computing application from the NWDAF, the SMF sends a subscription request to the NWDAF, and the request carries the application ID obtained from the PFD and the location of the UE. After NWDAF completes data analysis, it returns the user experience analysis of ECApplication to SMF.

[0480]Step 605, Data Traffic (data transmission).

[0481] When the UPF detects that the data transmitted by the UE matches the PDR, it reports the rule ID of the PDR to the SMF, so that the SMF learns the application ID of the application currently accessed by the UE.

[0482] Step 606, Application detection.

[0483] Step 607, UPF re-selection (UPF reselection).

[0484] If the application ID of the application accessed by the UE can match the EC application user experience analysis provided by the NWDAF, the SMF will further match the optimal user experience entry from the analysis result according to the location of the UE, and then obtain the serving anchor UPF information. SMF determines the serving anchor UPF as the new anchor UPF.

[0485] Step 608, Nsmf_EventExposure_Notification (Nsmf_Event Exposure Notification).

[0486] Step 609, Application relocation.

[0487] Step 610, Nsmf_EventExposure_AppRelocationInfo (Nsmf_EventExposure application relocation notification).

[0488] Before changing the anchor UPF, the SMF sends a notification to the AF of the user plane anchor change and the target DNAI according to the prior art. The application layer may perform Application relocation. At this time, AF needs to send confirmation to SMF after application relocation is completed.

[0489] Step 611 , use the newly selected anchor UPF to provide a data transmission service for the UE.

[0490] After the SMF receives the confirmation, it will use the selected new anchor UPF to create the optimal path for the UE to access the edge computing application. Specific ways can include:

[0491] A. Trigger the UL-CL insertion process, and install the data flow information corresponding to the application ID on the UL-CL, so that the UL-CL routes the data flow accessing the edge computing application to the new anchor UPF;

[0492] B. For a PDU session that allocates an IPv6 address to the UE, create a branch point (branch point) and allocate a new IPv6 address prefix, so that the UE will access the edge computing application through the newly allocated IPv6 address;

[0493] C. Request the UE to create a new PDU session, and then select the new anchor UPF to serve the UE.

Example Embodiment

[0494] Example 3:

[0495] This example illustrates the implementation of user experience analysis of EC Application provided by NWDAF to AF.

[0496] The data analysis content provided by NWDAF includes the following:

[0497] indicates that there is an inclusion relationship between these table items)

[0498]

[0499] In addition, if the AF requests user experience analysis, it may also request the NWDAF to provide DNAI recommendation information that can ensure user experience/service performance.

[0500] Figure 7 It is a schematic diagram of the process of NWDAF providing data analysis results to AF in Embodiment 3. As shown in the figure, based on the analysis provided by NWDAF, AF can determine the optimal application server when UE accesses edge computing applications. The process can be as follows:

[0501] Step 701, PDU Session is established.

[0502] Step 702, Data Traffic.

[0503] The UE creates a PDU session, and the carried S-NSSAI and DNN indicate that the PDU session will access the edge network. The UE performs data communication with the ECapplication server (edge computing application server).

[0504] Step 703: Nnwdaf_AnalyticsSubscription_Subscribe.

[0505] Step 704: Nnwdaf_AnalyticsSubscription_Notify.

[0506] In order to determine the edge computing server that optimally serves the UE, the EC AS may subscribe to the NWDAF for edge computing application QoE analysis. The subscription request carries the slave application ID and the location of the UE. After NWDAF completes data analysis, it returns the user experience analysis of EC Application as shown in Table 2 to SMF.

[0507] Step 705, Application relocation.

[0508] Step 706 , notify the SMF of the DNAI change.

[0509] According to user experience analysis, the EC AS determines the target DNAI where the optimal EC AS serving the UE is located. If the target DNAI is different from the DNAI where the current EC AS is located, the EC AS migrates the UE to the target EC AS, that is, executes Application relocation. Then, the target EC AS notifies the SMF that the DNAI of the currently serving UE has changed. The specific notification can at least be realized by using the AF request influence traffic routing process defined in the existing 3GPP protocol.

[0510] Step 707, Nnwdaf_AnalyticsSubscription_Request (Nnwdaf_Analytics Subscription Request).

[0511] Step 708, Nnwdaf_AnalyticsSubscription_Response (Nnwdaf_Analytics Subscription Response).

[0512] Step 709, UPF re-selection.

[0513] After the SMF receives the notification, it performs anchor UPF reselection. UPF reselection can be implemented in at least two ways as follows:

[0514] A. According to the prior art, according to UE location, target DNAI and other information to find a suitable UPF;

[0515] B. Request NWDAF to provide user experience analysis of EC Application, and provide UE location, target DNAI, S-NSSAI and other information in the request. NWDAF provides analytical results as shown in Table 1. SMF selects the anchor UPF that can provide the best user experience from the analysis results.

[0516] Step 710: Use the newly selected anchor UPF to provide a data transmission service for the UE.

[0517] After the SMF selects the target UPF, it will use the selected new anchor UPF to create the optimal path for the UE to access the edge computing application. For details, refer to step 611 of Embodiment 2.

PUM

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