CN113068175B - User data distribution method, sinking user plane function network element and system - Google Patents
User data distribution method, sinking user plane function network element and system Download PDFInfo
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- CN113068175B CN113068175B CN201911274259.4A CN201911274259A CN113068175B CN 113068175 B CN113068175 B CN 113068175B CN 201911274259 A CN201911274259 A CN 201911274259A CN 113068175 B CN113068175 B CN 113068175B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/14—Mobility data transfer between corresponding nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
Abstract
The disclosure provides a user data distribution method, a sinking user plane functional network element and a system, and relates to the technical field of multi-network cooperative communication. According to the method, under the condition that the UPF network element sinks and the N3IWF network element does not sink, the sinking UPF network element can acquire the authentication result of the control plane network element to the terminal from the N3IWF network element by enhancing the function of the sinking UPF network element, and can establish a tunnel with the terminal, and then directly shunt the data service of the terminal to a local data network based on the tunnel. The user accessed by the non-3GPP authenticates through the control plane network elements such as N3IWF to AMF/SMF and the like which are deployed in a centralized way, and the data flow can be directly shunted to the local data network from the sinking UPF network element, so that the user data accessed by the non-3GPP does not need to be detoured to the position where the 5G core network is deployed in a centralized way, and the service delay is reduced.
Description
Technical Field
The present disclosure relates to the field of multi-network cooperative communication technologies, and in particular, to a method for user data offloading, a sinking user plane functional network element, and a system.
Background
In the 3rd Generation Partnership Project (3 GPP) standard, a non-3GPP network accesses a 5G Core network (5 GC for short) through a non-3GPP inter-working Function (N3 IWF) network element, wherein a signaling plane is authenticated to an AMF (Core Access and Mobility Management Function)/SMF (Session Management Function) network element, and a data plane is accessed to a data network through a UPF (User plane Function) network element. Meanwhile, in the 5G network, the UPF network element may be sunk to reduce the delay of part of the service.
Disclosure of Invention
The inventor finds that whether the N3IWF network element sinks or not is a problem in the UPF network element sink scenario. If the N3IWF network element does not sink, the user data accessed by the non-3GPP needs to detour to the position where the 5G core network is intensively deployed, so that the service delay is increased; if the N3IWF network element sinks, the DNS (Domain Name System) server needs to inform the terminal which N3IWF to select in the N3IWF discovery process, which increases the work difficulty of the DNS server.
According to the method, under the condition that the UPF network element sinks and the N3IWF network element does not sink, the function of the sinking UPF network element is enhanced, so that the sinking UPF network element can acquire the authentication result of the control plane network element to the terminal from the N3IWF network element, a tunnel can be established with the terminal, and then the data service of the terminal is directly distributed to a local data network based on the tunnel, so that the user data accessed by the non-3GPP does not need to be roundabout to the position where the 5G core network is intensively deployed, and the service delay is reduced.
Some embodiments of the present disclosure provide a method for offloading user data, including:
a sinking user plane function UPF network element obtains the authentication result of a control plane network element to a terminal through a non-third generation partner plan interworking function N3IWF network element;
the sinking UPF network element responds to the request of the terminal for establishing the tunnel, determines whether the terminal passes the authentication according to the authentication result, and establishes the tunnel with the terminal under the condition of confirming that the terminal passes the authentication;
and the sinking UPF network element distributes the data service of the terminal to a local data network based on the tunnel.
In some embodiments, the tunnel establishment between the sinking UPF network element and the terminal includes: and the sinking UPF network element establishes a tunnel with the terminal based on the realized N3IWF network element data plane function.
In some embodiments, the sinking UPF network element obtains the authentication result of the control plane network element to the terminal through a signaling plane interface with the N3IWF network element.
In some embodiments, further comprising: and the N3IWF network element responds to a data service request initiated by the terminal after the terminal passes the authentication of the control plane network element, and sends the address information of the sinking UPF network element to the terminal, so that the terminal sends the request for establishing the tunnel to the sinking UPF based on the address information of the sinking UPF network element.
In some embodiments, the control plane network element comprises a core access and mobility management function, AMF, network element or a session management function, SMF, network element.
In some embodiments, the tunnel is an internet security protocol IPsec tunnel.
In some embodiments, the sinking UPF network element is deployed at the edge of a mobile network.
Some embodiments of the present disclosure provide a sinking User Plane Function (UPF) network element, including:
the authentication result acquisition module is configured to acquire an authentication result of the control plane network element to the terminal through a non-third generation partnership project interworking function N3IWF network element;
the tunnel establishing module is configured to respond to a request of establishing a tunnel by the terminal, determine whether the terminal passes authentication according to the authentication result, and establish the tunnel with the terminal under the condition that the terminal passes the authentication;
and the shunting module is configured to shunt the data traffic of the terminal to a local data network based on the tunnel.
In some embodiments, the tunnel establishing module is configured to establish a tunnel with the terminal based on the N3IWF network element data plane function implemented by the tunnel establishing module; and the authentication result acquisition module is configured to acquire the authentication result of the control plane network element to the terminal through a signaling plane interface with the N3IWF network element.
Some embodiments of the present disclosure provide a sinking User Plane Function (UPF) network element, including: a memory; and a processor coupled to the memory, the processor configured to perform the method of user data offloading of any of the embodiments based on instructions stored in the memory.
Some embodiments of the present disclosure provide a system for offloading user data, including: the sinking user plane function UPF network element according to any embodiment is configured to, after a terminal passes authentication of a control plane network element, send address information of the sinking UPF network element to the terminal in response to a data service request initiated by the terminal, so that the terminal sends the request for establishing a tunnel to the sinking UPF based on the address information of the sinking UPF network element.
Some embodiments of the present disclosure propose a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of user data offloading described in any of the embodiments.
Drawings
The drawings that will be used in the description of the embodiments or the related art will be briefly described below. The present disclosure will be more clearly understood from the following detailed description, which proceeds with reference to the accompanying drawings,
it is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without undue inventive faculty.
Fig. 1 is a schematic network deployment diagram of local user data offloading in a non-3GPP network access 5G core network scenario of the present disclosure.
Fig. 2 is a schematic structural diagram of a system for splitting user data in some embodiments of the present disclosure.
Fig. 3 is a schematic structural diagram of an enhanced sinking UPF network element in some embodiments of the present disclosure.
Fig. 4 is a schematic diagram of a user data offloading method according to some embodiments of the present disclosure.
Fig. 5 is a schematic structural diagram of an enhanced sinking UPF network element in some embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.
Some terms in the present disclosure are explained below.
The sinking UPF Network element is not deployed at a location where the core Network is centrally deployed any more, but is deployed at the edge of a mobile Network, such as a RAN (Radio Access Network) side.
The control plane network elements include, for example, AMF and SMF. The single AMF is responsible for mobility and access management of the terminal. The SMF is responsible for session management functions and may be configured in plural.
IPsec (Internet Protocol Security, Internet Security) is a Protocol packet that protects the network transport Protocol suite of packets by encrypting and authenticating the packets of the IP Protocol.
Fig. 1 is a schematic network deployment diagram of local user data offloading in a non-3GPP network access 5G core network scenario of the present disclosure.
As shown in fig. 1, in a network deployment of local User data offloading in a non-3GPP network access 5G core network scenario, a part of the data plane function of the N3IWF network element is added in the sinking UPF network element, for example, a User terminal may directly establish an IPsec tunnel with the sinking UPF network element, and a signaling plane interface between the sinking UPF network element and the N3IWF network element is newly added, so as to transmit an authentication result of a User Equipment (UE) by a control plane network element (such as AMF/SMF). Therefore, the non-3GPP accessed users can be authenticated through control plane network elements such as N3IWF to AMF/SMF and the like which are deployed in a centralized way, and the data flow can be directly shunted to a local data network (such as an enterprise internal network) from the sinking UPF network element. In addition, in the 5G core network centralized deployment area, a (non-sinking) UPF may also be set, and a user may access an external data network that does not need to perform local breakout through a non-3GPP network, an N3IWF network element, and the (non-sinking) UPF.
Fig. 2 is a schematic structural diagram of a system for splitting user data in some embodiments of the present disclosure.
As shown in fig. 2, the system 20 includes: an N3IWF network element 21 and a sinking UPF network element 22. Further, optionally, the system 20 may further include: and control plane network elements such as a DNS (domain name system) server, AMF/SMF and the like.
The N3IWF network element 21 is configured to respond to a data service request initiated by the terminal after the terminal is authenticated by the control plane network elements such as the AMF/SMF network element through the N3IWF network element, and send the address information of the sinking UPF network element to the terminal, so that the terminal sends a request for establishing a tunnel to the sinking UPF based on the address information of the sinking UPF network element.
The sinking UPF network element 22 is configured to obtain the authentication result of the control plane network element to the terminal through the N3IWF network element; responding to a request of a terminal for establishing a tunnel, determining whether the terminal passes authentication according to an authentication result, and establishing the tunnel with the terminal under the condition that the terminal passes the authentication; and distributing the data traffic of the terminal to a local data network based on the tunnel.
The DNS server may provide the user terminal with address information of the N3IWF network element.
And the control plane network elements such as AMF/SMF and the like can authenticate the terminal.
Fig. 3 is a schematic structural diagram of an enhanced sinking UPF network element in some embodiments of the present disclosure.
As shown in fig. 3, the sinking UPF network element 22 includes: modules 31-33.
And the authentication result obtaining module 31 is configured to obtain the authentication result of the control plane network element to the terminal from the N3IWF network element through the signaling plane interfaces of the newly added sinking UPF network element and the N3IWF network element.
The tunnel establishing module 32 is configured to respond to a request for establishing a tunnel by the terminal, determine whether the terminal passes authentication according to an authentication result, and establish the tunnel with the terminal when the terminal passes authentication, specifically, establish an IPsec tunnel with the terminal based on the N3IWF network element data plane function implemented by the tunnel establishing module.
And the offloading module 33 is configured to offload data traffic of the terminal to a local data network based on the tunnel.
Fig. 4 is a schematic diagram of a user data offloading method according to some embodiments of the present disclosure.
As shown in fig. 4, the method of this embodiment includes:
in step 41, after the terminal successfully registers in the non-3GPP network (e.g., WiFi network), the IP address of the N3IWF is obtained from the DNS server by means of DNS resolution.
In step 42, the terminal uses the IP address of the N3IWF to perform addressing, and the authentication is performed from the N3IWF to the AMF/SMF, and the authentication result is returned to the terminal through the N3 IWF.
In step 43, after the authentication is passed, the user initiates a data service request, and the N3IWF finds that the data service of the user can be directly shunted from the sinking UPF, and then executes the next step.
In step 44, the N3IWF instructs the terminal to establish an IPSec tunnel with the sinking UPF and sends the IP address of the sinking UPF to the terminal.
In step 45, the terminal initiates a request for establishing a tunnel to the sinking UPF based on the IP address of the sinking UPF, the sinking UPF obtains the authentication result of the AMF/SMF to the terminal from the N3IWF through the signaling plane interface with the N3IWF network element, and the sinking UPF establishes an IPSec tunnel with the terminal based on the data plane function of the N3IWF network element implemented by the sinking UPF when the terminal is confirmed to pass the authentication.
In step 46, the tunnel establishment is completed, and the data traffic of the user is directly shunted from the sinking UPF, that is, the data traffic of the terminal is directly shunted to the local data network based on the tunnel.
According to the method, under the condition that the UPF network element sinks and the N3IWF network element does not sink, the sinking UPF network element can acquire the authentication result of the control plane network element to the terminal from the N3IWF network element by enhancing the function of the sinking UPF network element, and can establish a tunnel with the terminal, and then directly shunt the data service of the terminal to a local data network based on the tunnel. The user accessed by the non-3GPP authenticates through the control plane network elements such as N3IWF to AMF/SMF and the like which are centrally deployed, and the data flow can be directly shunted to the local data network from the sinking UPF network element, so that the user data accessed by the non-3GPP does not need to detour to the centrally deployed position of the 5G core network, and the service delay is reduced.
Fig. 5 is a schematic structural diagram of an enhanced sinking UPF network element in some embodiments of the present disclosure.
As shown in fig. 5, the sinking UPF network element 22 includes: a memory 51 and a processor 52 coupled to the memory 51, wherein the processor 52 is configured to execute the method of user data offloading in any of the foregoing embodiments based on instructions stored in the memory 51.
The memory 51 may include, for example, a system memory, a fixed nonvolatile storage medium, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
Sinking UPF network element 22 may also include input-output interface 53, network interface 54, storage interface 55, etc. These interfaces 53, 54, 55 and the connection between the memory 51 and the processor 52 may be, for example, via a bus 55. The input/output interface 53 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 54 provides a connection interface for various networking devices. The storage interface 55 provides a connection interface for external storage devices such as an SD card and a usb disk.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure 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 disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. 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 exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A method for offloading user data, comprising:
a sinking user plane function UPF network element obtains the authentication result of a control plane network element to a terminal through a non-third generation partner plan interworking function N3IWF network element;
the sinking UPF network element responds to the request of the terminal for establishing the tunnel, determines whether the terminal passes the authentication according to the authentication result, and establishes the tunnel with the terminal under the condition of confirming that the terminal passes the authentication;
and the sinking UPF network element distributes the data service of the terminal to a local data network based on the tunnel.
2. The method of claim 1, wherein the step of the sinking UPF network element establishing a tunnel with the terminal comprises:
and the sinking UPF network element establishes a tunnel with the terminal based on the realized N3IWF network element data plane function.
3. The method of claim 1,
and the sinking UPF network element acquires the authentication result of the control plane network element to the terminal through a signaling plane interface of the N3IWF network element.
4. The method of claim 1, further comprising:
and the N3IWF network element responds to a data service request initiated by the terminal after the terminal passes the authentication of the control plane network element, and sends the address information of the sinking UPF network element to the terminal, so that the terminal sends the request for establishing the tunnel to the sinking UPF based on the address information of the sinking UPF network element.
5. The method of claim 1,
the control plane network element comprises a core access and mobility management function AMF network element or a session management function SMF network element;
or the tunnel is an internet security protocol (IPsec) tunnel;
or, the sinking UPF network element is deployed at the edge of the mobile network.
6. A sinking user plane function, UPF, network element, comprising:
the authentication result acquisition module is configured to acquire an authentication result of the control plane network element to the terminal through a non-third generation partnership project interworking function N3IWF network element;
the tunnel establishing module is configured to respond to a request of establishing a tunnel by the terminal, determine whether the terminal passes authentication according to the authentication result, and establish the tunnel with the terminal under the condition that the terminal passes the authentication;
and the shunting module is configured to shunt the data traffic of the terminal to a local data network based on the tunnel.
7. The UPF network element of claim 6,
the tunnel establishing module is configured to establish a tunnel with the terminal based on the N3IWF network element data plane function realized by the tunnel establishing module;
and the authentication result acquisition module is configured to acquire the authentication result of the control plane network element to the terminal through a signaling plane interface with the N3IWF network element.
8. A sinking user plane function, UPF, network element, comprising:
a memory;
and
a processor coupled to the memory, the processor configured to perform the method of user data offloading of any of claims 1-5 based on instructions stored in the memory.
9. A system for offloading user data, comprising:
sink user plane function, UPF, network element according to any of claims 6 to 8,
and
and the N3IWF network element is configured to respond to a data service request initiated by the terminal after the terminal passes the authentication of the control plane network element, and send the address information of the sinking UPF network element to the terminal, so that the terminal sends the request for establishing the tunnel to the sinking UPF based on the address information of the sinking UPF network element.
10. A non-transitory computer readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of user data offloading of any of claims 1-5.
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| CN113852990A (en) * | 2021-07-20 | 2021-12-28 | 浪潮软件科技有限公司 | Network element control system and method |
| CN114285522B (en) * | 2021-12-23 | 2024-04-30 | 中国电信股份有限公司 | Access control method, system and medium for local service area |
| CN114302503B (en) * | 2021-12-31 | 2023-06-06 | 广州爱浦路网络技术有限公司 | Data transmission method based on non-3GPP access function network element and non-3GPP access function network element |
| CN117135625A (en) * | 2022-05-20 | 2023-11-28 | 中国电信股份有限公司 | Data transmission method and system and signaling security management gateway |
| CN115483961B (en) * | 2022-08-24 | 2023-07-21 | 爱浦路网络技术(南京)有限公司 | Space-borne UPF deployment method, device and medium in space-earth integrated system |
| CN116193440B (en) * | 2023-02-08 | 2023-07-18 | 之江实验室 | User plane method and device for improving service security of 5G heterogeneous network |
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