Service network element information determination method, system, and storage medium

Abstract

The present disclosure provides a service network element information determination method, system and storage medium, wherein the method comprises: an information storage network element of a first system receives a first service network element query request or an update notification subscription request sent by a network element of the first system, and determines that a target network element type is a network element type of a second system; the information storage network element of the first system performs conversion processing on the first service network element query request or the update notification subscription request, generates a second service network element query request or an update notification subscription request, and sends the second service network element query request or the update notification subscription request to an information storage network element of the second system; the information storage network element of the first system receives network element information or network element update information of the second system corresponding to the target network element type returned by the information storage network element of the second system, and returns the network element information or the network element update information to the network element of the first system. The present disclosure can realize mutual positioning of 5GC network elements and EPC network elements, provide flexible policy scheduling and data sharing for users, and can reduce the cost and risk of network maintenance.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a method, system, and storage medium for determining service network element information. Background Technology

[0002] In EPC (Evolved Packet Core) networks, the PCRF (Policy and Charging Rules Function) can only dynamically adjust session-related policies. Therefore, under interoperability between 4G (4th-Generation) and 5G (5th-Generation) systems, the AM (Advanced Modem) or UE (User Equipment) policies dynamically adjusted by the PCF (Policy Control Function) of the 5GC (5G Core Network) based on network conditions or big data predictions cannot be distributed to the EPC side. When AM policies (e.g., RFSP (RAT / Frequency of Selection Priority) indexes) or UE policies (e.g., URSP (User Equipment Routing Selection Policy)) are inconsistent under 4G / 5G systems, it not only increases the difficulty of network operation and maintenance for operators but may also cause serious network incidents. Currently, there is no technical solution provided in the existing technology regarding how 5GC network elements (such as AMF) locate the UE in the EPC network's serving network elements (such as MME (Mobility Management Entity)). Summary of the Invention

[0003] In view of this, one technical problem to be solved by the present invention is to provide a method, system and storage medium for determining service network element information.

[0004] According to a first aspect of this disclosure, a method for determining service element information is provided, comprising: an information storage network element of a first system receiving a first service element query request or a first service element update notification subscription request sent by a network element of the first system, and determining that the target network element type corresponding to the first service element query request or the first service element update notification subscription request is a network element type of a second system; the information storage network element of the first system performing conversion processing on the first service element query request or the first service element update notification subscription request to generate a second service element query request or a second service element update notification subscription request, and sending it to the information storage network element of the second system; the information storage network element of the first system receiving network element information or network element update information of the second system returned by the information storage network element of the second system corresponding to the target network element type, and returning the network element information or network element update information of the second system to the network element of the first system; wherein, the information storage network element of the second system performs query processing based on the second service element query request or the second service element update notification subscription request to obtain the network element information or network element update information of the second system.

[0005] Optionally, the first system is a 4G system and the second system is a 5G system, or the first system is a 5G system and the second system is a 4G system.

[0006] Optionally, when the first system is a 5G system and the second system is a 4G system, the information storage network element of the first system is a UDM, and the information storage network element of the second system is an HSS.

[0007] Optionally, the information storage network element of the first system performs conversion processing on the first service network element query request or the first service network element update notification subscription request to generate a second service network element query request or a second service network element update notification subscription request and sends it to the information storage network element of the second system. This includes: the UDM converting the Subscribed User Permanent Identifier (SUPI) information in the first service network element query request or the first service network element update notification subscription request into International Mobile Subscriber Identity (IMSI) information; the UDM generating the second service network element query request or the second service network element update notification subscription request and sending it to the HSS; wherein, the second service network element query request includes: the IMSI information and the target network element type; the second service network element update notification subscription request includes: the IMSI information, the target network element type, and update notification time interval information.

[0008] Optionally, the UDM sends the second service element query request or the second service element update notification subscription request to the HSS by calling the Nhss interface, and receives the network element information or network element update information of the second system returned by the HSS.

[0009] Optionally, the target network element type includes: EPC network element type; the network element information of the second system includes: the ID and address of the EPC network element; the network element update information of the second system includes: the updated ID and address of the EPC network element.

[0010] Optionally, when the first system is a 4G system and the second system is a 5G system, the information storage network element of the first system is HSS, and the information storage network element of the second system is UDM.

[0011] Optionally, the information storage network element of the first system converts the first service network element query request or the first service network element update notification subscription request into a second service network element query request or the second service network element update notification subscription request, and sends it to the information storage network element of the second system. This includes: the HSS converting the IMSI information in the first service network element query request or the first service network element update notification subscription request into SUPI information; the HSS generating the second service network element query request or the second service network element update notification subscription request and sending it to the UDM; wherein, the second service network element query request includes: the SUPI information and the target network element type; the second service network element update notification subscription request includes: the SUPI information, the target network element type, and update notification time interval information.

[0012] Optionally, the HSS sends the second service element query request or the second service element update notification subscription request to the HSS by calling the Nudm interface, and receives the network element information or network element update information of the second system returned by the HSS.

[0013] Optionally, the target network element type includes: 5GC network element type; the network element information of the second system includes: ID and address of 5GC network element; the network element update information of the second system includes: updated ID and address of 5GC network element.

[0014] According to a second aspect of this disclosure, a service element information determination system is provided, comprising: an information storage network element of a first system, configured to receive a first service element query request or a first service element update notification subscription request sent by a network element of the first system, determine a target network element type corresponding to the first service element query request or the first service element update notification subscription request as a network element type of a second system; perform conversion processing on the first service element query request or the first service element update notification subscription request to generate a second service element query request or a second service element update notification subscription request and send it to the information storage network element of the second system; the information storage network element of the first system is further configured to receive network element information or network element update information of the second system returned by the information storage network element of the second system corresponding to the target network element type, and return the network element information or network element update information of the second system to the network element of the first system; and the information storage network element of the second system is configured to perform query processing based on the second service element query request or the second service element update notification subscription request to obtain the network element information or network element update information of the second system.

[0015] Optionally, the first system is a 4G system and the second system is a 5G system, or the first system is a 5G system and the second system is a 4G system.

[0016] Optionally, when the first system is a 5G system and the second system is a 4G system, the information storage network element of the first system is a UDM, and the information storage network element of the second system is an HSS.

[0017] Optionally, the UDM is used to convert the Subscribed User Permanent Identifier (SUPI) information in the first Service Element Query Request or the first Service Element Update Notification Subscription Request into International Mobile Subscriber Identity (IMSI) information; generate the second Service Element Query Request or the second Service Element Update Notification Subscription Request, and send it to the HSS; wherein the second Service Element Query Request includes: the IMSI information and the target network element type; the second Service Element Update Notification Subscription Request includes: the IMSI information, the target network element type, and update notification time interval information.

[0018] Optionally, the UDM is configured to send the second service element query request or the second service element update notification subscription request to the HSS by calling the Nhss interface, and receive the network element information or network element update information of the second system returned by the HSS.

[0019] Optionally, the target network element type includes: EPC network element type; the network element information of the second system includes: the ID and address of the EPC network element; the network element update information of the second system includes: the updated ID and address of the EPC network element.

[0020] Optionally, when the first system is a 4G system and the second system is a 5G system, the information storage network element of the first system is HSS, and the information storage network element of the second system is UDM.

[0021] Optionally, the HSS is used to convert the IMSI information in the first service element query request or the first service element update notification subscription request into SUPI information; generate the second service element query request or the second service element update notification subscription request, and send it to the UDM; wherein, the second service element query request includes: the SUPI information and the target network element type; the second service element update notification subscription request includes: the SUPI information, the target network element type, and update notification time interval information.

[0022] Optionally, the HSS is configured to send the second service element query request or the second service element update notification subscription request to the HSS by calling the Nudm interface, and receive the network element information or network element update information of the second system returned by the HSS.

[0023] Optionally, the target network element type includes: 5GC network element type; the network element information of the second system includes: ID and address of 5GC network element; the network element update information of the second system includes: updated ID and address of 5GC network element.

[0024] According to a third aspect of this disclosure, a computer-readable storage medium is provided that stores computer instructions which are executed by a processor using the method described above.

[0025] The service network element information determination method, system, and storage medium disclosed herein solve the problems that 5GC network elements cannot locate the UE's service network element under EPC, and EPC network elements cannot locate the UE's service network element under 5GC. It can achieve mutual location of 5GC network elements and EPC network elements without adding new interfaces, utilizing the existing 4G / 5G network interoperability architecture. It requires minimal equipment modification and is relatively easy to implement. It can provide users with flexible policy scheduling and data sharing, reduce network maintenance costs and risks, and improve user experience. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a flowchart illustrating one embodiment of the method for determining service network element information based on this disclosure;

[0028] Figure 2 This is a flowchart illustrating another embodiment of the method for determining service network element information based on this disclosure;

[0029] Figure 3 This is a flowchart illustrating yet another embodiment of the method for determining service network element information based on this disclosure;

[0030] Figure 4 This is a schematic diagram of a module of an embodiment of a system for determining service network element information based on the present disclosure. Detailed Implementation

[0031] The present disclosure will now be described more fully with reference to the accompanying drawings, which illustrate exemplary embodiments of the present disclosure. The technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative effort are within the scope of protection of the present disclosure.

[0032] The terms "first" and "second" used in the following text are only used to describe the differences between them and have no other special meaning.

[0033] Under the current 4G / 5G interoperability architecture, when a user accesses the 5GC, the network elements serving that user (such as AMF, SMF (Session Management Function), NWDAF (Network Data Analysis Function, etc.)) will be registered in the UDM (Unified Data Management). The UDM maintains the information, and 5GC network elements can obtain the network element information serving the user by querying the UDM.

[0034] When a user accesses the EPC network, the information of the network element serving the user (such as MME, IP-SM-GW) is registered in the HSS (Home Subscriber Server). The HSS maintains the information, and EPC network elements / IMS network elements can obtain the network element information serving the user by querying the HSS.

[0035] In the existing standards, HSS can only serve EPC network elements, used to locate the EPC network elements serving target users under 4G; UDM can only serve 5GC network elements, used to locate the 5GC network elements serving target users under 5G. Network elements in 5GC, such as AMF, cannot obtain the MME network element information registered by the user under EPC. Therefore, even if there is N26 interface communication between AMF and MME, it is impossible to obtain information within 5GC.

[0036] This disclosure allows for the addition of a Service-Based Architecture (SBA) service between the UDM and HSS. A 5GC network element can initiate a service element query to the UDM. When the UDM identifies the target network element of the request as an EPC network element, it queries the HSS, which returns the corresponding network element. The UDM then responds to the 5GC network element. For EPC network elements, the HSS can request service elements from the 5GC network element through the UDM.

[0037] Figure 1 This is a flowchart illustrating one embodiment of the method for determining service network element information according to this disclosure, as follows: Figure 1 As shown:

[0038] Step 101: The information storage network element of the first system receives the first service network element query request or the first service network element update notification subscription request sent by the network element of the first system, and determines the target network element type corresponding to the first service network element query request or the first service network element update notification subscription request as the network element type of the second system.

[0039] In one embodiment, the first system is a 4G system and the second system is a 5G system, or the first system is a 5G system and the second system is a 4G system.

[0040] Step 102: The information storage network element of the first system converts the query request or update notification subscription request of the first service network element into a second service network element query request or update notification subscription request, and sends it to the information storage network element of the second system.

[0041] Step 103: The information storage network element of the first system receives the network element information or network element update information of the second system corresponding to the target network element type returned by the information storage network element of the second system, and returns the network element information or network element update information of the second system to the network element of the first system. Specifically, the information storage network element of the second system performs query processing based on a second service network element query request or a second service network element update notification subscription request to obtain the network element information or network element update information of the second system.

[0042] In one embodiment, when the first system is a 5G system and the second system is a 4G system, the information storage network element of the first system is a UDM, and the information storage network element of the second system is an HSS. The UDM converts the SUPI (Subscriber Permanent Identifier) ​​information in the first service network element query request or the first service network element update notification subscription request into IMSI (International Mobile Subscriber Identity) information.

[0043] UDM can use various existing methods to convert SUPI information into IMSI information. UDM generates a second service element query request or a second service element update notification subscription request and sends it to HSS; wherein, the second service element query request includes IMSI information, target element type, etc., and the second service element update notification subscription request includes IMSI information, target element type, update notification time interval information, etc.

[0044] The UDM sends a second service element query request or a second service element update notification subscription request to the HSS by calling the Nhss interface, and receives the network element information or network element update information of the second system returned by the HSS. The Nhss interface is an existing interface, the target network element type includes the EPC network element type, the network element information of the second system includes the ID and address of the EPC network element, and the network element update information of the second system includes the updated ID and address of the EPC network element.

[0045] Figure 2 This is a flowchart illustrating another embodiment of the service element information determination method according to this disclosure. When a 5GC network element initiates a query for an EPC network element, the UDM performs the conversion from SUPI to IMSI and initiates a query to the HSS, as follows: Figure 2 As shown:

[0046] Step 201: UDM receives a service element query request from a 5GC network element. The 5GC network element can be an AMF, etc. The information carried in the service element query request includes SUPI information, network element type, etc.

[0047] Step 202: When it is determined that the target network element type for the query is an EPC network element, the UDM converts the SUPI information in the service network element query request into IMSI information.

[0048] In step 203, the UDM will generate a new service element query request or send a converted service element query request to the HSS. The service element query request carries information including the converted IMSI information and the network element type. The HSS uses existing methods to obtain the EPC network element information based on the new service element query request or the converted service element query request.

[0049] Step 204: HSS returns the EPC network element information requested by UDM, including EPC network element ID, network element address, etc.

[0050] Step 205: UDM returns the received EPC network element information to the 5GC network element.

[0051] In one embodiment, the UDM receives a service element update notification subscription request from a 5GC network element, such as an AMF. The service element update notification subscription request carries information including SUPI information, network element type, and update notification time interval information. The update notification time interval can be [current time, 4 hours later], [current time, 24 hours later], etc.

[0052] When the target network element type for the update query is determined to be an EPC network element, the UDM converts the SUPI information in the service element update notification subscription request into IMSI information. The UDM will then generate a new service element update notification subscription request or send the converted service element update notification subscription request to the HSS. The information carried in the service element update notification subscription request includes the converted IMSI information, network element type, update notification time interval information, etc.

[0053] HSS uses existing methods to obtain EPC network element update information based on new or transformed service element update notification subscription requests. For example, if the update notification time interval is [current time, 4 hours later], HSS periodically queries based on IMSI information, network element type, etc., within [current time, 4 hours later]. If it is determined that the EPC network element information requested by UDM has changed, including changes in EPC network element ID and / or network element address, HSS returns the EPC network element update information requested by UDM, including the updated ID and address of the EPC network element. UDM then returns the received EPC network element update information to the 5GC network element.

[0054] In one embodiment, when the first system is a 4G system and the second system is a 5G system, the information storage network element of the first system is HSS, and the information storage network element of the second system is UDM.

[0055] The HSS converts the IMSI information in the first service element query request or the first service element update notification subscription request into SUPI information. The HSS can use various existing methods to convert IMSI information into SUPI information. The HSS generates a second service element query request or a second service element update notification subscription request and sends it to the UDM. The second service element query request includes SUPI information, target element type, etc., and the second service element update notification subscription request includes SUPI information, target element type, update notification time interval information, etc.

[0056] HSS sends second service element query requests or second service element update notification subscription requests to HSS by calling the Nudm interface, and receives the second system's network element information or network element update information returned by HSS. The Nudm interface is an existing interface, the target network element type includes 5GC network element type, and the network element information of the second system includes: 5GC network element ID, address, etc.

[0057] Figure 3 This is a flowchart illustrating another embodiment of the service element information determination method according to this disclosure. When the EPC network element initiates a query for the 5GC network element, the HSS converts the IMSI information to SUPI information and initiates a query to the UDM, as follows: Figure 3 As shown:

[0058] Step 301: The EPC receives a service element query request from the EPC network element. The service element query request carries information such as IMSI information and network element type. The EPC network element includes MME, etc.

[0059] Step 302: When it is determined that the network element type being queried is a 5GC network element, the HSS converts the IMSI information in the service network element query request into SUPI information.

[0060] In step 303, the HSS will generate a new service element query request or send a converted service element query request to the UDM. The service element query request carries information including the converted SUPI information and the network element type. The UDM uses existing methods to obtain 5GC network element information based on the new service element query request or the converted service element query request.

[0061] Step 304: UDM returns the 5GC network element information requested by HSS. The 5G network element information includes network element ID, network element address, etc.

[0062] Step 305: The HSS returns the received 5GC network element information to the EPC network element.

[0063] In one embodiment, the EPC receives a service element update notification subscription request from an EPC network element. The service element update notification subscription request carries information including IMSI information, network element type, and update notification time interval information. The update notification time interval can be [current time, 4 hours later], [current time, 24 hours later], etc. EPC network elements include MMEs, etc.

[0064] When the network element type being queried is determined to be a 5GC network element, the HSS converts the IMSI information in the service element update notification subscription request into SUPI information. The HSS will then generate a new service element update notification subscription request or send the converted service element update notification subscription request to the UDM. The information carried in the service element update notification subscription request includes the converted SUPI information, network element type, update notification time interval information, etc.

[0065] UDM uses existing methods to obtain 5GC network element update information based on new or transformed service element update notification subscription requests. For example, if the update notification time interval is [current time, 4 hours later], UDM periodically queries based on SUPI information and network element type within [current time, 4 hours later] at 5-minute intervals. If it is determined that the 5GC network element information requested by HSS has changed, including changes to the 5GC network element ID and / or network element address, then UDM returns the 5GC network element update information requested by HSS, including the updated ID and address of the 5GC network element. HSS then returns the received 5GC network element information to the EPC network element.

[0066] By utilizing the SBI service between UDM and HSS, 5GC network elements are allowed to obtain service element information of users under EPC. Since under the existing architecture, 5GC network elements cannot directly access HSS, and EPC network elements cannot directly access UDM, the service interfaces Nudm and Nhss, which interoperate between UDM and HSS, can be used: when a 5GC network element initiates a query for an EPC network element, UDM performs the SUPI to IMSI conversion and initiates the query to HSS; when an EPC network element initiates a query for a 5GC network element, HSS performs the IMSI to SUPI conversion and initiates the query to UDM.

[0067] In one embodiment, in a scenario where 4G / 5G networks coexist, the policies for both 4G and 5G networks should be consistent, such as AM policies and UE policies. Furthermore, data from the 4G network can be made available to the 5G network element, such as location changes and trajectories. These functionalities require the 5G network element to accurately locate the 4G network element (e.g., MME) serving the user.

[0068] Using the service element information determination method disclosed herein, based on the existing 4G / 5G network interoperability architecture and the basic process of SBA service, it requires minimal equipment modification and is relatively easy to implement. It can achieve mutual positioning of EPC and 5GC network elements, thereby providing users with flexible policy scheduling and data sharing, reducing network maintenance costs and risks.

[0069] In one embodiment, such as Figure 4 As shown, this disclosure provides a service network element information determination system, including a network element 41 of a first system, an information storage network element 42 of the first system, and an information storage network element 43 of a second system. The first system is a 4G system and the second system is a 5G system, or the first system is a 5G system and the second system is a 4G system.

[0070] The information storage network element 42 of the first system receives a first service network element query request or a first service network element update notification subscription request sent by the network element 41 of the first system, and determines the target network element type corresponding to the first service network element query request or the first service network element update notification subscription request as the network element type of the second system.

[0071] The information storage network element 42 of the first system converts the query request or subscription request for the first service network element into a second service network element query request or subscription request for the second service network element update notification, and sends it to the information storage network element 43 of the second system. The information storage network element 43 of the second system performs query processing based on the second service network element query request or subscription request for the second service network element update notification to obtain network element information or network element update information of the second system.

[0072] The first system's information storage network element 42 receives the second system's network element information or network element update information, which corresponds to the target network element type, returned by the second system's information storage network element, and returns the second system's network element information or network element update information to the first system's network element.

[0073] In one embodiment, when the first system is a 5G system and the second system is a 4G system, the information storage network element 42 of the first system is a UDM, and the information storage network element 43 of the second system is an HSS.

[0074] The UDM converts the Subscribed User Permanent Identifier (SUPI) information in the First Service Element Query Request or the First Service Element Update Notification Subscription Request into the International Mobile Subscriber Identity (IMSI) information. The UDM generates a Second Service Element Query Request or a Second Service Element Update Notification Subscription Request and sends it to the HSS. The Second Service Element Query Request includes IMSI information, target element type, etc. The Second Service Element Update Notification Subscription Request includes IMSI information, target element type, and update notification time interval information.

[0075] The UDM sends a second service element query request or a second service element update notification subscription request to the HSS by calling the Nhss interface, and receives the second system's network element information or network element update information returned by the HSS. The target network element type includes the EPC network element type; the network element information of the second system includes: the ID and address of the EPC network element, etc.; the network element update information of the second system includes: the updated ID and address of the EPC network element, etc.

[0076] In one embodiment, when the first system is a 4G system and the second system is a 5G system, the information storage network element 42 of the first system is an HSS, and the information storage network element 43 of the second system is a UDM.

[0077] The HSS converts the IMSI information in the first service element query request or the first service element update notification subscription request into SUPI information; the HSS generates a second service element query request or a second service element update notification subscription request and sends it to the UDM. The second service element query request includes SUPI information, target element type, etc., and the second service element update notification subscription request includes SUPI information, target element type, update notification time interval information, etc.

[0078] HSS sends second-service network element query requests or second-service network element update notification subscription requests to HSS via the Nudm interface, and receives network element information or network element update information of the second system returned by HSS. The target network element type includes 5GC network element type; the network element information of the second system includes: ID, address, etc. of 5GC network element, and the network element update information of the second system includes: updated ID and address of 5GC network element.

[0079] In one embodiment, this disclosure provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the service network element information determination method as described in any of the above embodiments.

[0080] The service element information determination method, system, and storage medium in the above embodiments solve the problems that the 5GC network element cannot locate the UE's service network element under the EPC, and the EPC network element cannot locate the UE's service network element under the 5GC. It can achieve mutual location between the 5GC network element and the EPC network element without adding new interfaces, utilizing the existing 4G / 5G network interoperability architecture. It requires minimal equipment modification and is relatively easy to implement. It is applicable to both interoperability architectures with and without the N26 interface. By achieving mutual location between the 5GC and EPC network elements, users can be provided with flexible policy scheduling and data sharing, reducing network maintenance costs and risks, and improving user experience.

[0081] The methods and systems of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0082] The description in this disclosure is provided for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the disclosure to its forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of this disclosure and to enable those skilled in the art to understand this disclosure and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A method for determining service network element information, comprising: The information storage network element of the first system receives a first service network element query request or a first service network element update notification subscription request sent by the network element of the first system, and determines the target network element type corresponding to the first service network element query request and the first service network element update notification subscription request as the network element type of the second system. The information storage network element of the first system converts the query request of the first service network element or the update notification subscription request of the first service network element to generate a query request of the second service network element or a subscription request of the second service network element update notification, and sends it to the information storage network element of the second system. The information storage network element of the first system receives the network element information or network element update information of the second system that corresponds to the target network element type returned by the information storage network element of the second system, and returns the network element information or network element update information of the second system to the network element of the first system. The information storage network element of the second system performs query processing based on the query request of the second service network element or the subscription request of the second service network element update notification, in order to obtain the network element information or network element update information of the second system. When the first system is a 5G system and the second system is a 4G system, the information storage network element of the first system is UDM and the information storage network element of the second system is HSS. The second service network element query request includes: IMSI information and the target network element type; the second service network element update notification subscription request includes: the IMSI information, the target network element type, and update notification time interval information.

2. The method as described in claim 1, wherein, The first system is a 4G system and the second system is a 5G system, or the first system is a 5G system and the second system is a 4G system.

3. The method as described in claim 2, wherein the information storage network element of the first system performs conversion processing on the query request of the first service network element or the subscription request for the update notification of the first service network element, generates a second service network element query request or a second service network element update notification subscription request, and sends it to the information storage network element of the second system, comprising: The UDM converts the Subscribed User Permanent Identifier (SUPI) information in the first Service Element Query Request or the first Service Element Update Notification Subscription Request into the IMSI information. The UDM generates a second service element query request or a second service element update notification subscription request and sends it to the HSS.

4. The method of claim 3, further comprising: The UDM sends the second service element query request or the second service element update notification subscription request to the HSS by calling the Nhss interface, and receives the network element information or network element update information of the second system returned by the HSS.

5. The method as described in claim 3 or 4, wherein, The target network element types include: EPC network element types; The network element information of the second system includes: the ID and address of the EPC network element; The network element update information of the second system includes: the updated ID and address of the EPC network element.

6. The method of claim 2, wherein, When the first system is a 4G system and the second system is a 5G system, the information storage network element of the first system is HSS, and the information storage network element of the second system is UDM.

7. The method as described in claim 6, wherein the information storage network element of the first system performs conversion processing on the first service network element query request or the first service network element update notification subscription request to generate a second service network element query request or the second service network element update notification subscription request, and sends it to the information storage network element of the second system, comprising: The HSS converts the IMSI information in the first service element query request or the first service element update notification subscription request into SUPI information. The HSS generates a second service element query request or a second service element update notification subscription request and sends it to the UDM; The second service element query request includes: the SUPI information and the target network element type; the second service element update notification subscription request includes: the SUPI information, the target network element type, and update notification time interval information.

8. The method of claim 7, further comprising: The HSS sends the second service element query request or the second service element update notification subscription request to the HSS by calling the Nudm interface, and receives the network element information or network element update information of the second system returned by the HSS.

9. The method of claim 7 or 8, wherein, The target network element types include: 5GC network element types; The network element information of the second system includes: the ID and address of the 5GC network element; The network element update information of the second system includes: the updated ID and address of the 5GC network element.

10. A system for determining service network element information, comprising: The information storage network element of the first system is used to receive the first service network element query request or the first service network element update notification subscription request sent by the network element of the first system, and determine the target network element type corresponding to the first service network element query request and the first service network element update notification subscription request as the network element type of the second system. The first service element query request or the first service element update notification subscription request is converted and processed to generate a second service element query request or a second service element update notification subscription request and sent to the information storage network element of the second system; The information storage network element of the first system is also used to receive network element information or network element update information of the second system corresponding to the target network element type returned by the information storage network element of the second system, and return the network element information or network element update information of the second system to the network element of the first system. The information storage network element of the second system is used to perform query processing based on the query request of the second service network element or the update notification subscription request of the second service network element, in order to obtain the network element information or network element update information of the second system. In the case where the first system is a 5G system and the second system is a 4G system, the information storage network element of the first system is UDM, and the information storage network element of the second system is HSS; the second service network element query request includes: IMSI information and the target network element type; the second service network element update notification subscription request includes: the IMSI information, the target network element type, and update notification time interval information.

11. The system of claim 10, wherein, The first system is a 4G system and the second system is a 5G system, or the first system is a 5G system and the second system is a 4G system.

12. The system of claim 11, wherein, The UDM is used to convert the Subscribed User Permanent Identifier (SUPI) information in the first Service Element Query Request or the first Service Element Update Notification Subscription Request into International Mobile Subscriber Identity (IMSI) information. Generate a second service element query request or a second service element update notification subscription request, and send it to the HSS.

13. The system of claim 12, wherein, The UDM is used to send the second service element query request or the second service element update notification subscription request to the HSS by calling the Nhss interface, and to receive the network element information or network element update information of the second system returned by the HSS.

14. The system as claimed in claim 12 or 13, wherein, The target network element types include: EPC network element types; The network element information of the second system includes: the ID and address of the EPC network element; The network element update information of the second system includes: the updated ID and address of the EPC network element.

15. The system of claim 11, wherein, When the first system is a 4G system and the second system is a 5G system, the information storage network element of the first system is HSS, and the information storage network element of the second system is UDM.

16. The system of claim 15, wherein, The HSS is used to convert the IMSI information in the first service element query request or the first service element update notification subscription request into SUPI information. Generate a second service element query request or a second service element update notification subscription request, and send it to the UDM; The second service element query request includes: the SUPI information and the target network element type; the second service element update notification subscription request includes: the SUPI information, the target network element type, and update notification time interval information.

17. The system of claim 16, wherein, The HSS is used to send the second service network element query request or the second service network element update notification subscription request to the HSS by calling the Nudm interface, and to receive the network element information or network element update information of the second system returned by the HSS.

18. The system of claim 16 or 17, wherein, The target network element types include: 5GC network element types; The network element information of the second system includes: the ID and address of the 5GC network element; The network element update information of the second system includes: the updated ID and address of the 5GC network element.

19. A computer-readable storage medium storing computer instructions that are executed by a processor according to any one of claims 1 to 9.

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