Data subscription notification method and device
Saving and using the latest session management contract data attributes and paths through UDM, the problem of unreliable subscription notification messages in 5G networks is solved, and accurate subscription notifications to SMF is achieved, and the experience and accuracy of user data services is improved.
Patent Information
- Application Number
- CN202311759943.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-06-20
AI Technical Summary
In 5G networks, subscription notification messages between session management function (SMF) and unified data management (UDM) are unreliable, resulting in data errors and the impact of user data services.
UDM saves the relevant attributes and corresponding paths of the session management contract data that have been recently synchronized to SMF. When the attributes are modified, the paths and values of the modified attributes are determined based on these saved information, and sends a subscription notification message carrying these information to SMF.
Through this method, UDM can accurately notify SMF about changes in session management contract data, ensure the reliability of subscription notifications, and thus improve the experience and accuracy of user data services.
Smart Images
Figure CN120186596A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of communications, and more particularly, to a data subscription notification method and apparatus. Background Art
[0002] 3GPP has introduced the 5G network as the fifth-generation mobile communication network. Along with the refinement of usage scenarios, the Nudm_SDM_Subscribe request (request for subscribing to the subscription data management service) of the Session Management function (SMF) has introduced parameters such as the Data Network Name (DNN) and single Network Slice Selection Assistance Information (singleNssai). The Unified Data Management (UDM) can refine the subscription notification according to the parameters carried in the subscription request. For the scenario where the refined SMF subscription request carries the DNN or singleNssai, it is required that the UDM makes a match based on the DNN or singleNssai carried in the subscription request and performs an accurate subscription notification. The UDM needs to determine the operation (change type, such as ADD (add), REPLACE (replace), etc.), the value of the path (Json pointer, the target position in the changed resource), and the attribute value (the value of the modified attribute).
[0003] To ensure the accuracy of the subscription notification, the key lies in that the path of the currently modified attribute carried by the UDM must be consistent with the path of the attribute that was last synchronized (synchronized through Nudm_SDM_Get) to the SMF. Otherwise, it will cause incorrect data on the SMF side and affect the use of user data services.
[0004] When the SMF obtains sm-data (session management subscription data) through Nudm_SDM_Get (a request to obtain user data directed to the SDM), it does not carry slice and DNN information. The UDM returns all subscribed slice and DNN information to the SMF (in the case where the user subscribes to two sets of slices, one set of slices is associated with DNN = NET for 1-ABC321, and the other set of slices is associated with DNN = WAP for 2-ABC320). When the SMF subscribes, it carries the specified slice and DNN (slice is 2-ABC320, DNN is WAP). Since there is no information about the SMF in the Nudm_SDM_Get request, the UDM cannot obtain the path information that was last synchronized to the SMF. When the relevant subscription data associated with DNN = WAP changes, the UDM can only construct the notification path "path": " / 0 / dnnConfigurations / WAP" according to the subscription request. However, the SMF sends Nudm_SDM_Get messages to two DNNs, and the paths are " / 0 / dnnConfigurations / NET" and " / 1 / dnnConfigurations / WAP" respectively. Therefore, after the SMF receives the subscription notification, it cannot locate the record that needs to modify the DNN through this path, resulting in a failure to update data on the SMF side.
[0005] In the 3GPP protocol, the Nudm_SDM_Get procedure can also carry DNN and singleNssai parameters, but in actual application scenarios, it is not strictly guaranteed that the DNN and singleNssai information carried by the Nudm_SDM_Get of the SMF and the subscription are exactly the same. The 3GPP protocol does not provide the associated SMF information (nfInstanceId) for the Nudm_SDM_Get procedure. Therefore, the UDM side cannot perceive the path information that was last synchronized to the SMF, so the reliability of the sm-data subscription notification cannot be guaranteed. Summary of the Invention
[0006] Embodiments of the present application provide a method and device for data subscription notification to solve the problem of unreliable subscription notification messages in related technologies.
[0007] According to an embodiment of the present application, a method for data subscription notification is provided, including: The Unified Data Management UDM saves the relevant attributes and corresponding paths of the session management subscription data that was last synchronized to the Session Management Function SMF.
[0008] In the case where the relevant attributes of the session management subscription data subscribed by the SMF are modified, the UDM determines the path and value of the modified relevant attributes based on the saved relevant attributes of the session management subscription data and the corresponding path, and sends a subscription notification message of the session management subscription data to the SMF, where the subscription notification message carries the path and value of the modified relevant attributes.
[0009] According to another embodiment of the present application, there is provided a data subscription notification device, including: a saving module, configured to save the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the session management function (SMF); a sending module, configured to, in the case where the relevant attributes of the session management subscription data subscribed by the SMF are modified, determine the path and value of the modified relevant attributes based on the saved relevant attributes of the session management subscription data and the corresponding path, and send a subscription notification message of the session management subscription data to the SMF; where the subscription notification message carries the path and value of the modified relevant attributes.
[0010] According to still another embodiment of the present application, there is further provided a computer-readable storage medium, in which a computer program is stored, where the computer program is configured to execute the steps in any one of the above method embodiments when running.
[0011] According to still another embodiment of the present application, there is further provided an electronic device, including a memory and a processor, where a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.
[0012] Through the embodiments of the present application, in the case where the relevant attributes of the session management subscription data subscribed by the SMF are modified, since the UDM saves the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the SMF, the UDM determines the path and value of the modified relevant attributes based on the saved relevant attributes of the session management subscription data and the corresponding path, and sends a subscription notification message of the session management subscription data carrying the path and value of the modified relevant attributes to the SMF, ensuring that the path information for the UDM to obtain the subscription notification is consistent with that on the SMF side. It can solve the problem of unreliable subscription notification messages in the related art, and thus achieve the effect of improving the reliability of the subscription notification messages. Description of the Drawings
[0013] Figure 1 is a hardware structure block diagram of a computer terminal for the data subscription notification method according to an embodiment of the present application;
[0014] Figure 2It is a flowchart of a data subscription notification method according to an embodiment of the present application;
[0015] Figure 3 It is a structural block diagram of a data subscription notification device according to an embodiment of the present application;
[0016] Figure 4 It is a structural block diagram of a data subscription notification device according to another embodiment of the present application;
[0017] Figure 5 It is a structural block diagram of a data subscription notification method according to another embodiment of the present application;
[0018] Figure 6 It is a flowchart of a data subscription notification method according to another embodiment of the present application. Detailed implementation manners
[0019] In the following, embodiments of the present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.
[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.
[0021] The method embodiments provided in the embodiments of the present application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a computer terminal as an example, Figure 1 It is a hardware structural block diagram of a computer terminal of a data subscription notification method according to an embodiment of the present application. As Figure 1 shown, the computer terminal may include one or more ( Figure 1 only one is shown in the figure) processors 102 (the processors 102 may include, but are not limited to, processing devices such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Among them, the above-mentioned computer terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that, Figure 1 the structure shown is only schematic and does not limit the structure of the above-mentioned computer terminal. For example, the computer terminal may further include more or fewer components than Figure 1 shown in the figure, or have a different configuration from Figure 1 shown in the figure.
[0022] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the data subscription notification method in the embodiments of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above-mentioned method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the computer terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
[0023] The transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of a computer terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station and thus can communicate with the Internet. In one instance, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.
[0024] Figure 2 is a flowchart of the data subscription notification method according to the embodiments of the present application, as Figure 2 shown, and this process includes the following steps:
[0025] Step S202, the Unified Data Management UDM saves the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the Session Management Function SMF;
[0026] It should be noted that the relevant attributes of the session management subscription data in the embodiments of the present application may include: allowed Protocol Data Unit (PDU) session types, Quality of Service (QoS) information, static IP addresses, user plane security policies, billing characteristics associated with the PDU session, etc., and the corresponding path refers to the storage location of the data or the access path of the data.
[0027] In step S202 of this embodiment, it further includes: the UDM receives a first request message for obtaining session management subscription data triggered by the SMF, where the SMF identifier is carried in the first request message; the UDM returns a first response message to the SMF in response to the first request message, where the session management subscription data is carried in the first response message; the UDM saves the SMF identifier and the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the SMF.
[0028] In an exemplary embodiment of the present application, the session management subscription data is sm-data information, the first request message may be a Nudm_SDM_Get request, and the SMF identifier may be the nfInstanceId of the SMF itself.
[0029] In an exemplary embodiment, after the UDM returns an acquisition request response message to the SMF, it further includes: the UDM receives a second request message for subscribing to a session management subscription data change notification triggered by the SMF, where the second request message carries: the SMF identifier and the session management subscription data to be subscribed; the UDM saves the information carried in the second request message and returns a second response message indicating successful subscription to the SMF.
[0030] In an exemplary embodiment, the second request message further carries at least one of the following: data network name DNN and single network slice selection assistance information.
[0031] Step S204, in the case where the relevant attributes of the session management subscription data subscribed by the SMF are modified, the UDM determines the paths and values of the modified relevant attributes based on the saved relevant attributes and corresponding paths of the session management subscription data, and sends a session management subscription data subscription notification message to the SMF, where the subscription notification message carries the paths and values of the modified relevant attributes.
[0032] Before the UDM in step S204 of this embodiment determines the paths of the modified relevant attributes based on the saved relevant attributes and corresponding paths of the session management subscription data, it further includes: the UDM receives a third request message for modifying the session management subscription data triggered by the business operation support system BOSS; the UDM modifies the relevant attributes of the local session management subscription data based on the third request message and returns a third response message indicating successful modification of the session management subscription data to the BOSS.
[0033] In step S204 of this embodiment, the UDM determines the path and value of the modified relevant attribute based on the relevant attribute and corresponding path of the saved session management subscription data, including: when the UDM determines that the relevant attribute of the session management subscription data subscribed by the SMF has been modified, the UDM determines the path and value of the modified relevant attribute based on the relevant attribute and corresponding path of the session management subscription data that is newly synchronized to the SMF; wherein, the UDM obtaining the relevant attribute and corresponding path of the session management subscription data that is newly synchronized to the SMF includes: the UDM obtaining the relevant attribute and corresponding path of the session management subscription data that is newly synchronized to the SMF according to the SMF identifier in the subscription message.
[0034] It should be noted that the application environment of the embodiments of this application is as follows: In a 5G network, the data transfer function between a user equipment (UE) and a data network (DN) is realized through PDU session establishment. During the PDU session establishment process, the SMF needs to obtain relevant subscription information through a Nudm_SDM_Get request. The relevant subscription information includes: allowed PDU session types, QoS information, charging attributes related to the PDU, etc. At the same time, it also supports the modification of PDU sessions. The triggering conditions for the SMF to modify the session include changes in sm-data subscription data in the UDM, local configuration changes, etc. The SMF can decide whether to send an update to the Policy Control Function (PCF).
[0035] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of this application.
[0036] In this embodiment, a data subscription notification device is further provided. This device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.
[0037] Figure 3 is the structural block diagram of the data subscription notification device according to an embodiment of the present application. As Figure 3 shown, the device includes a storage module 10 and a sending module 20.
[0038] The storage module 10 is used to store the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the session management function SMF;
[0039] The sending module 20 is used to, when the relevant attributes of the session management subscription data subscribed by the SMF are modified, determine the paths and values of the modified relevant attributes based on the stored relevant attributes and corresponding paths of the session management subscription data, and send a subscription notification message of the session management subscription data to the SMF, where the subscription notification message carries the paths and values of the modified relevant attributes.
[0040] Figure 4 is the structural block diagram of the data subscription notification device according to another embodiment of the present application. As Figure 4 shown, in addition to including all the modules shown Figure 3 above, the storage module further includes: a receiving unit 11, a sending unit 12, and a storage unit 13.
[0041] The receiving unit 11 is used to receive a first request message for obtaining session management subscription data triggered by the SMF, where the first request message carries an SMF identifier;
[0042] The sending unit 12 is used to return a first response message to the SMF in response to the first request message, where the first response message carries the session management subscription data;
[0043] The storage unit 13 is used to store the SMF identifier and the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the SMF.
[0044] It should be noted that the above-mentioned various modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to this: all the above-mentioned modules are located in the same processor; or, the above-mentioned various modules are respectively located in different processors in any combination form.
[0045] For the convenience of understanding the technical solution provided by the present application, the following will be elaborated in detail with reference to the embodiments of specific scenarios.
[0046] Figure 5 is the structural block diagram of the data subscription notification method according to another embodiment of the present application, Figure 5 which includes:
[0047] The PCF, which is the policy control center of 5G, is used to send policy rules to the SMF and the User Plane Function (UPF).
[0048] The SMF is used for session management such as session establishment, modification, and release.
[0049] The UDM is mainly responsible for the management of user subscription data and the subscription notification of data in the embodiments of this application.
[0050] The Business Operation Support System (BOSS) is responsible for operator service activation and modification.
[0051] Figure 6 is a flowchart of the data subscription notification method according to another embodiment of this application, as Figure 6 shown, and includes the following steps:
[0052] S601, the SMF triggers a GET request to the UDM through the Nudm_SDM_Get interface;
[0053] Specifically, the triggered GET request carries the resource sm-data to be subscribed and the SMF identification information (nfInstanceId).
[0054] S602, the UDM returns a response message to the SMF carrying the sm-data information;
[0055] Specifically, the UDM simultaneously saves the nfInstanceId and the path information corresponding to the attributes of sm-data actually synchronized to the SMF, and dynamically updates and maintains them.
[0056] S603, the SMF triggers a subscription request to the UDM through the Nudm_SDM_Subscribe interface;
[0057] Specifically, the triggered subscription request carries the sm-data resource to be subscribed, and at the same time carries the nfInstanceId, DNN, and singleNssai information.
[0058] S604, the UDM returns a successful response message to the SMF;
[0059] Specifically, the UDM saves the subscription information.
[0060] S605, the BOSS triggers a request to modify the subscription data to the UDM to modify the sm-data related subscription data;
[0061] S606, the UDM returns a successful response message to the BOSS;
[0062] Specifically, the UDM modifies the local subscription.
[0063] S607, the UDM triggers a notification request to the SMF;
[0064] Specifically, the UDM determines that the SMF has subscribed to sm-data changes. By obtaining the historical synchronization information saved in step 2 based on the nfInstanceId in the locally saved subscription record, for the local subscription data, it determines the historical path and value information of the modified attribute fields this time, constructs a notification message using this path, and triggers a notification request to the SMF.
[0065] S608, the SMF returns a success response message to the UDM.
[0066] Specifically, the SMF updates the data and triggers the PDU session modification process.
[0067] In an exemplary embodiment, the specific method for refining the subscription notification is as follows: If the SMF subscription request does not include singleNssai and does not include dnn, the UDM notifies of data changes for all DNN configurations and network slices; If the SMF subscription request includes "singleNssai" and does not include "dnn", the UDM notifies of data changes for the network slice identified by "singleNssai", and all DNN configurations of the requested network slice identified by "singleNssai"; If the SMF subscription request does not include "singleNssai" and includes "dnn", the UDM needs to notify of data changes for all network slices of this DNN, and all DNN configurations identified by "dnn"; If the SMF subscription request includes "singleNssai" and includes "dnn", the UDM notifies of data changes for the network slice identified by "singleNssai", and this DNN has the DNN configuration identified by "dnn".
[0068] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. Wherein, the computer program is set to execute the steps in any one of the above method embodiments when running.
[0069] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: USB flash drives, read-only memory (ROM for short), random access memory (RAM for short), mobile hard disks, magnetic disks, or optical discs and other various media that can store computer programs.
[0070] Embodiments of the present application also provide an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.
[0071] In an exemplary embodiment, the above electronic device may further include a transmission device and an input / output device. Among them, the transmission device is connected to the above processor, and the input / output device is connected to the above processor.
[0072] Specific examples in this embodiment may refer to the examples described in the above embodiments and exemplary embodiments, and will not be elaborated here.
[0073] The embodiments of the present application achieve the following technical effects: Through the data subscription notification method of the embodiments of the present application, it can be ensured that when the sm-data related attributes on the UDM side change, the SMF can be accurately notified, thereby triggering the modification of the PDU session, ensuring the accuracy of data services, and improving the user experience of data services.
[0074] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order than here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module to implement. In this way, the present application is not limited to any specific combination of hardware and software.
[0075] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the principle of the present application shall be included in the protection scope of the present application.
Claims
1. A data subscription notification method, characterized in that, including: The Unified Data Management (UDM) stores the relevant attributes and corresponding paths of the session management subscription data that is synchronized to the Session Management Function (SMF) most recently; When the relevant attributes of the session management subscription data subscribed by the SMF are modified, the UDM determines the paths and values of the modified relevant attributes based on the stored relevant attributes and corresponding paths of the session management subscription data, and sends a subscription notification message of the session management subscription data to the SMF; Wherein, the subscription notification message carries the paths and values of the modified relevant attributes.
2. The method according to claim 1, characterized in that, The UDM stores the relevant attributes and corresponding paths of the session management subscription data that is synchronized to the SMF most recently, including: The UDM receives a first request message for obtaining session management subscription data triggered by the SMF, wherein the first request message carries an SMF identifier; The UDM returns a first response message to the SMF in response to the first request message, wherein the first response message carries session management subscription data; The UDM stores the SMF identifier and the relevant attributes and corresponding paths of the session management subscription data that is synchronized to the SMF most recently.
3. The method according to claim 2, characterized in that, After the UDM returns an acquisition request response message to the SMF, it further includes: The UDM receives a second request message for subscribing to a session management subscription data change notification triggered by the SMF, wherein the second request message carries the SMF identifier and the session management subscription data to be subscribed; The UDM stores the information carried in the second request message and returns a second response message indicating successful subscription to the SMF.
4. The method according to claim 1, characterized in that, Before the UDM determines the paths of the modified relevant attributes based on the stored relevant attributes and corresponding paths of the session management subscription data, it further includes: The UDM receives a third request message for modifying session management subscription data triggered by the Business Operation Support System (BOSS); The UDM modifies the relevant attributes of the local session management subscription data based on the third request message and returns a third response message indicating successful modification of the session management subscription data to the BOSS.
5. The method according to claim 1, characterized in that, The UDM determines the paths and values of the modified relevant attributes based on the stored relevant attributes and corresponding paths of the session management subscription data, including: When the UDM determines that the relevant attributes of the session management subscription data subscribed by the SMF have been modified, the UDM determines the paths and values of the modified relevant attributes based on the relevant attributes and corresponding paths of the session management subscription data that is synchronized to the SMF most recently obtained; Wherein, the UDM obtains the relevant attributes and corresponding paths of the session management subscription data that is synchronized to the SMF most recently, including: the UDM obtains the relevant attributes and corresponding paths of the session management subscription data that is synchronized to the SMF most recently according to the SMF identifier in the subscription message.
6. The method according to claim 3, characterized in that, The second request message further carries at least one of the following: Data Network Name (DNN) and Single Network Slice Selection Assistance Information.
7. A data subscription notification device, characterized in that, including: A saving module, configured to save the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the Session Management Function (SMF). A sending module, configured to, when the relevant attributes of the session management subscription data subscribed by the SMF are modified, determine the paths and values of the modified relevant attributes based on the saved relevant attributes and corresponding paths of the session management subscription data, and send a subscription notification message of the session management subscription data to the SMF; wherein, the subscription notification message carries the paths and values of the modified relevant attributes.
8. The device according to claim 7, characterized in that, The saving module further includes: A receiving unit, configured to receive a first request message for obtaining session management subscription data triggered by the SMF, wherein the first request message carries an SMF identifier. A sending unit, configured to return a first response message to the SMF in response to the first request message, wherein the first response message carries session management subscription data. A saving unit, configured to save the SMF identifier and the relevant attributes and corresponding paths of the session management subscription data that is newly synchronized to the SMF.
9. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, wherein when the computer program is executed by a processor, the steps of the method described in any one of claims 1 to 6 are implemented.
10. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, the steps of the method described in any one of claims 1 to 6 are implemented.