CN112217653A - Strategy issuing method, device and system - Google Patents
Strategy issuing method, device and system Download PDFInfo
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- CN112217653A CN112217653A CN201910622258.8A CN201910622258A CN112217653A CN 112217653 A CN112217653 A CN 112217653A CN 201910622258 A CN201910622258 A CN 201910622258A CN 112217653 A CN112217653 A CN 112217653A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0893—Assignment of logical groups to network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
Abstract
The invention discloses a strategy issuing method, a device and a system, and relates to the technical field of mobile communication. The strategy issuing method comprises the following steps: the NEF acquires a strategy application sent by an application server, wherein the strategy application comprises the number of a mobile user; the NEF sends a user authentication request to the SMF, wherein the user authentication request comprises the number of the mobile user, so that the SMF queries the private network IP address corresponding to the number in the user authentication request according to the corresponding relation between the number of the mobile user stored in advance and the allocated private network IP address; the NEF acquires a user authentication response which is sent by the SMF and comprises the private network IP address inquired by the SMF; the NEF constructs a strategy for the mobile user according to the private network IP address in the user authentication response; the NEF sends the constructed policy to the PCF to execute. The embodiment of the invention can realize the construction and the issuing of the 5G strategy in more 5G scenes on the premise of not influencing the performance of the equipment.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method, an apparatus, and a system for issuing a policy.
Background
In the operation process of a Network element of a Network open Function (NEF) in a 5G core Network, the NEF needs to acquire a private Network IP allocated to a user by the 5G core Network, and is used for binding a Protocol Data Unit (PDU) session after policy issuing.
One way provided by the related art is that a User Plane Function (UPF) inserts a User private network IP address into a request message sent by a User to an application, and the NEF issues Policy information to a User Policy Control Function (PCF) by using the User private network IP address. Another way provided by the related technology is that the NEF configures a mapping table of a user public Network IP Address, a private Network IP Address and a port number, and by applying the provided public Network IP Address, the NEF queries a Network Address Translation (NAT) device to obtain a mapping relationship between the user public/private Network and the port number, thereby obtaining the private Network IP of the user.
Disclosure of Invention
The inventor finds out after analysis that the mode provided by the related technology has certain defects.
For the way that the UPF inserts the user private IP address into the message, the UPF needs to detect the message and modify the application layer message to start deep packet inspection. This approach may increase device overhead. According to the data of the prior network investigation, the performance is reduced by 15 to 20 percent after the gateway is opened and the deep packet inspection is carried out
For the way that NEF configures IP mapping tables of public network and private network, in 5G scene, if the scheme of uniformly distributing IP by using Session Management Function (SMF) is adopted, the IP address of the user public network and the IP address of the private network are in dynamic mapping relation, which does not support the query. Under the condition that the local shunt capability is introduced in the 5G, in the process that a PDU session is anchored in a new UPF from an old User Plane Function (UPF), the User private network IP keeps unchanged, but the public network IP behind the NAT changes, so that the method for inquiring the private network IP by using a static mapping table is not feasible.
The embodiment of the invention aims to solve the technical problem that: how to implement the construction and the issuing of the 5G strategy in more 5G scenes on the premise of not influencing the performance of the equipment.
According to a first aspect of some embodiments of the present invention, there is provided a policy issuing method, including: the NEF acquires a strategy application sent by an application server, wherein the strategy application comprises the number of a mobile user; the NEF sends a user authentication request to the SMF, wherein the user authentication request comprises the number of the mobile user, so that the SMF queries the private network IP address corresponding to the number in the user authentication request according to the corresponding relation between the number of the mobile user stored in advance and the allocated private network IP address; the NEF acquires a user authentication response which is sent by the SMF and comprises the private network IP address inquired by the SMF; the NEF constructs a strategy for the mobile user according to the private network IP address in the user authentication response; the NEF sends the constructed policy to the PCF to execute.
In some embodiments, the policy application further includes a public network IP address of the mobile user, and the NEF stores a correspondence between the public network IP address of the mobile user and the IP address of the SMF; the NEF sends a user authentication request to a home SMF corresponding to the public network IP address of the mobile user.
In some embodiments, the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF is determined according to the region corresponding to the public network IP address and the region corresponding to the IP address of the SMF.
In some embodiments, the policy includes at least one of a charging policy, a routing policy, a quality of service, QoS, policy.
In some embodiments, the policy application is sent by the application server in response to the mobile user using the application service.
In some embodiments, the policy issuing method further includes: responding to a terminal access network of a mobile user, the SMF acquires a PDU session establishment request message sent by the AMF, wherein the PDU session establishment request message comprises the number of the mobile user; the SMF selects UPF to establish PDU conversation; the SMF allocates a private network IP address for the mobile user and stores the corresponding relation between the number of the mobile user and the allocated private network IP address.
According to a second aspect of some embodiments of the present invention, there is provided a policy issuing apparatus, where the policy issuing apparatus is located in an NEF, including: the system comprises a strategy application acquisition module, a strategy application acquisition module and a strategy application processing module, wherein the strategy application acquisition module is configured to acquire a strategy application sent by an application server, and the strategy application comprises a number of a mobile user; the authentication request sending module is configured to send a user authentication request to the SMF, wherein the user authentication request comprises the number of the mobile user, so that the SMF queries the private network IP address corresponding to the number in the user authentication request according to the corresponding relation between the number of the mobile user and the allocated private network IP address which are stored in advance; the authentication response acquisition module is configured to acquire a user authentication response which is sent by the SMF and comprises the private network IP address inquired by the SMF; the strategy construction module is configured to construct a strategy for the mobile user according to the private network IP address in the user authentication response; and the strategy sending module is configured to send the constructed strategy to the PCF for execution.
In some embodiments, the policy application further includes a public network IP address of the mobile user, and the NEF stores a correspondence between the public network IP address of the mobile user and the IP address of the SMF; the authentication request sending module is further configured to send a user authentication request to a home SMF corresponding to the public network IP address of the mobile user.
In some embodiments, the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF is determined according to the region corresponding to the public network IP address and the region corresponding to the IP address of the SMF.
According to a third aspect of some embodiments of the present invention, there is provided a policy issuing system, including: the NEF comprises any one of the strategy issuing devices; and the SMF is configured to acquire a user authentication request sent by the NEF, wherein the user authentication request comprises the number of the mobile user; inquiring a private network IP address corresponding to the number in the user authentication request according to a corresponding relation between the number of the mobile user and the allocated private network IP address which are stored in advance; and sending a user authentication response comprising the inquired private network IP address to the NEF.
In some embodiments, the SMF is further configured to acquire, in response to the terminal access network of the mobile subscriber, a PDU session establishment request message sent by the AMF, where the PDU session establishment request message includes a number of the mobile subscriber; selecting a UPF to establish a PDU session; and distributing a private network IP address for the mobile user, and storing the corresponding relation between the number of the mobile user and the distributed private network IP address.
Some embodiments of the above invention have the following advantages or benefits: the embodiment of the invention adds the interaction between the NEF and the SMF, and supports the number carrying the mobile user in the interaction process, so that the SMF can search the private network IP address of the user through the number of the mobile user and return the private network IP address to the NEF. The NEF may construct a policy based on the acquired private network IP address. Therefore, the embodiment can realize the construction and the issuing of the 5G strategy in more 5G scenes on the premise of not influencing the performance of the equipment.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow diagram of a policy issuing method according to some embodiments of the present invention.
Fig. 2 is a schematic flow chart of a policy issuing method according to some embodiments of the present invention.
Fig. 3 is a flow diagram illustrating the process of constructing a correspondence between a number and a private network IP address according to some embodiments of the invention.
Fig. 4 is an exemplary signaling flow diagram of a policy delivery method according to some embodiments of the invention.
Fig. 5 is a schematic structural diagram of a policy issuing device according to some embodiments of the present invention.
Fig. 6 is a schematic structural diagram of a policy issuing system according to some embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic flow diagram of a policy issuing method according to some embodiments of the present invention. As shown in fig. 1, the policy issuing method of this embodiment includes steps S102 to S112.
In step S102, the NEF obtains a policy application sent by the application server, where the policy application includes a number of the mobile subscriber. The Mobile Subscriber number may be a Mobile station International ISDN number (MSISDN).
In some embodiments, the policy application is sent by the application server in response to the mobile user using the application service.
In step S104, the NEF sends a user authentication request to the SMF, where the user authentication request includes the number of the mobile subscriber.
In step S106, the SMF queries the private network IP address corresponding to the number in the user authentication request based on the correspondence between the number of the mobile user and the assigned private network IP address stored in advance. The corresponding relation can be established after the SMF allocates a private network IP address for the mobile user when the user is attached to the online.
In step S108, the NEF acquires the user authentication response sent by the SMF and including the private network IP address queried by the SMF.
In step S110, NEF constructs a policy for the mobile user according to the private network IP address in the user authentication response.
In some embodiments, the policy includes at least one of a charging policy, a routing policy, and a Quality of Service (QoS) policy. For example, by acquiring the number of the mobile user, and determining that the user is a premium user, a higher QoS may be configured for the user; for another example, by obtaining the number of the mobile subscriber and determining that the subscriber is exempt from traffic for application X, a policy that does not deduct a traffic balance when using application X may be configured for the subscriber.
In step S112, the NEF sends the constructed policy to the PCF for execution.
The method of the above embodiment adds interaction between the NEF and the SMF, and supports carrying the number of the mobile subscriber in the interaction process, so that the SMF can search the private network IP address of the subscriber through the number of the mobile subscriber and return the private network IP address to the NEF. The NEF may construct a policy based on the acquired private network IP address. Therefore, the embodiment can realize the construction and the issuing of the 5G strategy in more 5G scenes on the premise of not influencing the performance of the equipment.
In some embodiments, the NEF may configure the correspondence of the user's public network IP address to the SMF address for interaction with the NEF by the user's home SMF. An embodiment of the policy issuing method of the present invention is described below with reference to fig. 2.
Fig. 2 is a schematic flow chart of a policy issuing method according to some embodiments of the present invention. As shown in fig. 2, the policy issuing method of this embodiment includes steps S202 to S212.
In step S202, the NEF obtains a policy application sent by the application server, where the policy application includes a number of a mobile subscriber and a public network IP address. The NEF stores the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF.
In step S204, the NEF sends a user authentication request to the home SMF corresponding to the public network IP address of the mobile subscriber, where the user authentication request includes the number of the mobile subscriber.
In some embodiments, the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF is determined according to the region corresponding to the public network IP address and the region corresponding to the IP address of the SMF.
For example, an operator may plan a particular IP network segment for each province when planning an IP address. By determining the network segment corresponding to the IP address, the corresponding area can be determined. The public network IP address of the mobile user belonging to the same area corresponds to the IP address of the SMF.
In step S206, the home SMF queries the private IP address corresponding to the number in the user authentication request based on the correspondence between the number of the mobile user and the assigned private IP address stored in advance.
In step S208, the NEF acquires the user authentication response sent by the home SMF and including the private network IP address queried by the home SMF.
In step S210, NEF constructs a policy for the mobile user according to the private network IP address in the user authentication response.
In step S212, NEF sends the constructed policy to PCF for execution.
By configuring the corresponding relation between the user public network IP address and the SMF IP address for the NEF, the user public network IP address can be used for inquiring the SMF IP address to which the user belongs. Therefore, the user can inquire the private network IP address of the user by the user attributive SMF, and the inquiry efficiency and the success rate are improved.
In some embodiments, the SMF may determine a correspondence between the mobile subscriber's number and the private network IP address when the subscriber accesses the network. An embodiment of constructing a correspondence relationship of a number and a private network IP address is described below with reference to fig. 3.
Fig. 3 is a flow diagram illustrating the process of constructing a correspondence between a number and a private network IP address according to some embodiments of the invention. As shown in fig. 3, the method of this embodiment includes steps S302 to S306.
In step S302, in response to the terminal of the mobile user accessing the network, the SMF obtains a PDU session establishment request message sent by an Access and Mobility Management Function (AMF), where the PDU session establishment request message includes a number of the mobile user.
In step S304, the SMF selects a UPF to establish the PDU session.
In step S306, the SMF allocates a private network IP address to the mobile subscriber, and stores a correspondence between the number of the mobile subscriber and the allocated private network IP address.
Thus, the SMF can store the correspondence between the mobile subscriber's number and the assigned private network IP address by means of the process of the subscriber going online.
An exemplary signaling flow of the policy issuing method of the present invention is described below with reference to fig. 4.
Fig. 4 is an exemplary signaling flow diagram of a policy delivery method according to some embodiments of the invention. As shown in fig. 4, the policy issuing method of this embodiment includes steps S402 to S414.
In step S402, the 5G subscriber attaches to the line, and the AMF sends a PDU Session Establishment Request (PDU Session Establishment Request) to the SMF, where the PDU Session Establishment Request includes the MSISDN of the subscriber.
In step S404, the SMF sends an N4Session Establishment Request (N4 Session Establishment Request) to the UPF, and assigns a private network IP address to the user and saves the correspondence between the MSISDN and the private network IP address.
In step S406, in response to the service of using APP by the user, the APP Server (application Server) sends a HyperText Transfer Protocol (HTTP) request to the NEF to apply for a policy for the user, where the request includes the public network IP address and MSISDN of the user. When the user uses the APP, the APP can obtain the public network IP address and the MSISDN of the user and send the public network IP address and the MSISDN to the APP Server.
The NEF may query the information of the IP address of the SMF to which the user belongs, according to the stored correspondence between the public network IP address and the IP address of the SMF.
In step S408, the NEF sends a UE Identifier Query Request (user authentication Request) to the SMF to which the user belongs, where the UE Identifier Query Request carries the MSISDN of the user.
In step S410, after the SMF finds the private network IP address corresponding to the MSISDN of the user, it returns it to the NEF through the UE Identifier Query Response.
In step S412, the NEF constructs a 5G policy according to the acquired private network IP address of the user, and issues the policy to the PCF for execution.
In step S414, the NEF returns an HTTP response to the APP Server.
By the method of the embodiment, the 5G strategy construction and issuing under each scene can be realized by combining the existing signaling flow and the interaction between the newly added SMF and the NEF.
An embodiment of the policy issuing apparatus of the present invention is described below with reference to fig. 5.
Fig. 5 is a schematic structural diagram of a policy issuing device according to some embodiments of the present invention. As shown in fig. 5, the policy issuing apparatus 500 of this embodiment includes: the policy application obtaining module 5100 is configured to obtain a policy application sent by an application server, where the policy application includes a number of a mobile user; an authentication request sending module 5200 configured to send a user authentication request to the SMF, where the user authentication request includes a mobile user number, so that the SMF queries a private network IP address corresponding to the number in the user authentication request according to a correspondence between a pre-stored mobile user number and an allocated private network IP address; the authentication response acquisition module 5300 is configured to acquire a user authentication response sent by the SMF and including the private network IP address queried by the SMF; a policy construction module 5400 configured to construct a policy for the mobile user according to the private network IP address in the user authentication response; a policy sending module 5500 configured to send the constructed policy to the PCF for execution.
In some embodiments, the policy application further includes a public network IP address of the mobile user, and the NEF stores a correspondence between the public network IP address of the mobile user and the IP address of the SMF; the authentication request sending module 5200 is further configured to send the user authentication request to a home SMF corresponding to the mobile user's public network IP address.
In some embodiments, the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF is determined according to the region corresponding to the public network IP address and the region corresponding to the IP address of the SMF.
In some embodiments, the policy includes at least one of a charging policy, a routing policy, a quality of service, QoS, policy.
In some embodiments, the policy application is sent by the application server in response to the mobile user using the application service.
An embodiment of the policy issuing system of the present invention is described below with reference to fig. 6.
Fig. 6 is a schematic structural diagram of a policy issuing system according to some embodiments of the present invention. As shown in fig. 6, the policy issuing system 60 of this embodiment includes: the NEF610, the NEF610 includes any one of the above-mentioned policy issuing device 500; and an SMF620 configured to acquire a user authentication request sent by the NEF610, wherein the user authentication request includes a number of a mobile user; inquiring a private network IP address corresponding to the number in the user authentication request according to a corresponding relation between the number of the mobile user and the allocated private network IP address which are stored in advance; a user authentication response including the queried private network IP address is sent to NEF 610.
In some embodiments, the SMF620 is further configured to obtain a PDU session establishment request message sent by the AMF in response to the terminal of the mobile subscriber accessing the network, where the PDU session establishment request message includes a number of the mobile subscriber; selecting a UPF to establish a PDU session; and distributing a private network IP address for the mobile user, and storing the corresponding relation between the number of the mobile user and the distributed private network IP address.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (11)
1. A strategy issuing method comprises the following steps:
a network open function (NEF) acquires a policy application sent by an application server, wherein the policy application comprises a number of a mobile user;
the NEF sends a user authentication request to a Session Management Function (SMF), wherein the user authentication request comprises the number of the mobile user, so that the SMF inquires a private network IP address corresponding to the number in the user authentication request according to the corresponding relation between the number of the mobile user stored in advance and the allocated private network IP address;
the NEF acquires a user authentication response which is sent by the SMF and comprises the private network IP address inquired by the SMF;
the NEF constructs a strategy for the mobile user according to the private network IP address in the user authentication response;
the NEF sends the constructed policy to the policy control function PCF for execution.
2. The policy issuing method according to claim 1, wherein the policy application further includes a public network IP address of the mobile subscriber, and the NEF stores a correspondence between the public network IP address of the mobile subscriber and an IP address of the SMF;
and the NEF sends a user authentication request to a home SMF corresponding to the public network IP address of the mobile user.
3. The policy issuing method according to claim 2, wherein the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF is determined according to a region corresponding to the public network IP address and a region corresponding to the IP address of the SMF.
4. The policy issuing method according to claim 1, wherein the policy includes at least one of a charging policy, a routing policy, and a quality of service (QoS) policy.
5. The policy issuing method according to claim 1, wherein the policy application is sent by the application server in response to the mobile user using the application service.
6. The policy issuing method according to any one of claims 1 to 5, further comprising:
responding to a terminal access network of a mobile user, an SMF acquires a Protocol Data Unit (PDU) session establishment request message sent by an access and mobility management function (AMF), wherein the PDU session establishment request message comprises the number of the mobile user;
the SMF selects UPF to establish PDU conversation;
the SMF allocates a private network IP address for the mobile user and stores the corresponding relation between the number of the mobile user and the allocated private network IP address.
7. A strategy issuing device is positioned in NEF and comprises:
the system comprises a strategy application acquisition module, a strategy application acquisition module and a strategy application processing module, wherein the strategy application acquisition module is configured to acquire a strategy application sent by an application server, and the strategy application comprises a number of a mobile user;
the system comprises an authentication request sending module, a user authentication request sending module and a user authentication request sending module, wherein the user authentication request comprises the number of the mobile user, so that the SMF inquires the private network IP address corresponding to the number in the user authentication request according to the corresponding relation between the number of the mobile user and the allocated private network IP address which is stored in advance;
the authentication response acquisition module is configured to acquire a user authentication response which is sent by the SMF and comprises the private network IP address inquired by the SMF;
the strategy construction module is configured to construct a strategy for the mobile user according to the private network IP address in the user authentication response;
and the strategy sending module is configured to send the constructed strategy to the PCF for execution.
8. The policy issuing device according to claim 7, wherein the policy application further includes a public network IP address of the mobile subscriber, and the NEF stores a correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF;
the authentication request sending module is further configured to send a user authentication request to a home SMF corresponding to the public network IP address of the mobile user.
9. The policy issuing apparatus according to claim 8, wherein the correspondence between the public network IP address of the mobile subscriber and the IP address of the SMF is determined according to a region corresponding to the public network IP address and a region corresponding to the IP address of the SMF.
10. A policy issuing system includes:
the NEF, wherein the NEF comprises the strategy issuing device of any one of claims 7-9;
and the SMF is configured to acquire a user authentication request sent by the NEF, wherein the user authentication request comprises the number of the mobile user; inquiring a private network IP address corresponding to the number in the user authentication request according to a corresponding relation between a prestored mobile user number and an allocated private network IP address; and sending a user authentication response comprising the inquired private network IP address to the NEF.
11. The policy delivery system according to claim 10, wherein the SMF is further configured to obtain a PDU session establishment request message sent by the AMF in response to the terminal access network of the mobile subscriber, wherein the PDU session establishment request message includes a number of the mobile subscriber; selecting a UPF to establish a PDU session; and allocating a private network IP address for the mobile user, and storing the corresponding relation between the number of the mobile user and the allocated private network IP address.
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| CN113873502A (en) * | 2021-09-29 | 2021-12-31 | 中国电信股份有限公司 | IP address management method, NEF entity and communication system |
| CN114885382A (en) * | 2022-07-12 | 2022-08-09 | 北京艾灵客科技有限公司 | Service session management method, device and storage medium |
| US20230300104A1 (en) * | 2020-07-06 | 2023-09-21 | Nokia Technologies Oy | Apparatus and method to facilitate network address translation service |
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| CN114885382B (en) * | 2022-07-12 | 2022-10-25 | 北京艾灵客科技有限公司 | Service session management method, device and storage medium |
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