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CN114980276B - Private network slice access method, device and system - Google Patents

Private network slice access method, device and system Download PDF

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Publication number
CN114980276B
CN114980276B CN202210688535.7A CN202210688535A CN114980276B CN 114980276 B CN114980276 B CN 114980276B CN 202210688535 A CN202210688535 A CN 202210688535A CN 114980276 B CN114980276 B CN 114980276B
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China
Prior art keywords
amf
network
private network
network element
public network
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CN114980276A (en
Inventor
谢沛荣
李文苡
尹君
梁灏泉
吴敏清
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Priority to CN202210688535.7A priority Critical patent/CN114980276B/en
Publication of CN114980276A publication Critical patent/CN114980276A/en
Priority to PCT/CN2022/127241 priority patent/WO2023240873A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0038—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of security context information

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosure provides a private network slice access method, device and system, and relates to the technical field of wireless communication. The method comprises the following steps: the public network NSSF network element receives a query target AMF request sent by the public network AMF network element; if the public network NSSF network element does not inquire the target AMF, returning default AMF setting information to the public network AMF network element; the public network AMF network element redirects the user registration message to the private network gateway according to AMF setting information, wherein the private network gateway is configured to guide the user to access the private network slice. The method and the device can reduce the influence on the public network caused by frequent changes of the private network slicing service, and ensure the stable operation of the public network.

Description

Private network slice access method, device and system
Technical Field
The disclosure relates to the technical field of wireless communication, and in particular relates to a private network slice access method, device and system.
Background
In 5G vertical industry applications, it may be a common scenario for a related enterprise or campus to self-deploy 5G private network slices and share 5G base stations with the public network. Private network users initially access from a public network AMF (ACCESS AND Mobility Management Function ) and need to access the appropriate private network AMF by redirection.
The public network AMF needs to find a proper private network AMF for redirection, needs to perform configuration update frequently according to the requirements or changes of private network service, and easily affects the stable operation of the public network AMF and NSSF (Network Slice Selection Function ).
Disclosure of Invention
The technical problem to be solved by the present disclosure is to provide a private network slice access method, device and system, which can reduce the influence of frequent changes of private network slice services on the public network.
According to an aspect of the present disclosure, a private network slice access method is provided, including: the public network slice selection function NSSF network element receives a query target AMF request sent by the public network access and mobility management function AMF network element; if the public network NSSF network element does not inquire the target AMF, returning default AMF setting information to the public network AMF network element; the public network AMF network element redirects the user registration message to the private network gateway according to AMF setting information, wherein the private network gateway is configured to guide the user to access the private network slice.
In some embodiments, the public network NSSF network element configures default AMF setting information, where the default AMF setting information includes an AMF setting identification.
In some embodiments, the default AMF setting information further comprises AMF address information.
In some embodiments, redirecting the user registration message to the private network gateway by the public network AMF network element according to the AMF setting information comprises: and the public network AMF network element inquires AMF address information corresponding to the AMF setting identifier in the network storage function NRF network element, and redirects the user registration message to the private network gateway according to the AMF address information.
In some embodiments, redirecting the user registration message to the private network gateway by the public network AMF network element according to the AMF setting information comprises: and the public network AMF network element redirects the user registration message to the private network gateway according to AMF address information in the default AMF setting information.
In some embodiments, the network element of the public network NSSF searches the target AMF according to the slice information signed by the user and the slice information requested by the user.
In some embodiments, the public network AMF network element sends a query target AMF request to the public network NSSF network element in the event that user slicing cannot be supported.
According to another aspect of the present disclosure, there is also provided a private network slice access apparatus, including: the public network slice selection function NSSF is configured to receive a target AMF inquiry request sent by the public network access and mobility management function AMF network element, and if the target AMF is not inquired, the default AMF setting information is returned to the public network AMF network element; and a public network AMF network element configured to redirect the user registration message to a private network gateway according to the AMF setting information, wherein the private network gateway is configured to direct the user to access the private network slice.
According to another aspect of the present disclosure, there is also provided a private network slice access system, including: the private network slice access device; and a private network element configured to direct a user to access the private network slice.
According to another aspect of the present disclosure, there is also provided an electronic device including: a memory; and a processor coupled to the memory, the processor configured to perform a private network slice access method as described above based on instructions stored in the memory.
According to another aspect of the disclosure, there is also provided a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement a private network slice access method as described above.
In the embodiment of the disclosure, the public network NSSF returns default AMF Set information when a suitable AMF cannot be found for the user, the public network AMF redirects the user registration message to the private network gateway, and the private network gateway selects to redirect to the suitable private network AMF, so that the influence on the public network caused by frequent changes of the private network slicing service can be avoided.
Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
Fig. 1 is a flow diagram of some embodiments of a private network slice access method of the present disclosure;
FIG. 2 is a flow chart of other embodiments of the private network slice access method of the present disclosure;
FIG. 3 is a flow chart of other embodiments of the private network slice access method of the present disclosure;
fig. 4 is a schematic structural view of some embodiments of a private network slice access device of the present disclosure; and
Fig. 5 is a schematic structural diagram of some embodiments of the electronic device of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.
Fig. 1 is a flow diagram of some embodiments of a private network slice access method of the present disclosure.
In step 110, the public network NSSF network element receives the query target AMF request sent by the public network AMF network element.
In some embodiments, the public network AMF network element sends a query target AMF request to the public network NSSF network element in the event that user slicing cannot be supported.
In step 120, if the network element of the public network NSSF does not query the target AMF, the default AMF setting information is returned to the network element of the public network AMF.
In some embodiments, the public network NSSF network element configures default AMF Set information, where the default AMF Set information includes an AMF Set identification.
In some embodiments, the default AMF Set information also includes AMF address information, such as an AMF IP address.
For the AMF Set information, it is unnecessary to configure slice information supported by the AMF Set information.
In some embodiments, the AMF Set corresponds to a private network gateway, rather than a real AMF network element. The AMF IP address information is the IP address of the private network gateway.
In step 130, the public network AMF network element redirects the user registration message to the private network gateway according to the AMF setting information, wherein the private network gateway is configured to direct the user to access the private network slice.
In some embodiments, the dedicated gateway redirects the user to the appropriate private network AMF according to pre-configured information.
In the above embodiment, the public network NSSF returns default AMF Set information when a suitable AMF cannot be found for the user, the public network AMF redirects the user registration message to the private network gateway, and then the private network gateway selects to redirect to the suitable private network AMF, so that the influence on the public network caused by frequent modification of the private network slicing service can be avoided, and the stable operation of the public network is ensured.
Fig. 2 is a flow chart illustrating other embodiments of the private network slice access method of the present disclosure.
In step 210, the public network NSSF network element configures default AMF Set information.
In some embodiments, since the number of AMF network elements of the public network is far greater than that of the public network NSSF, if corresponding default AMF Set information is configured in each AMF network element of the public network, the modification to the AMF network element of the public network is greater. Therefore, configuring default AMF Set information at the network element of the public network NSSF has less impact on the public network than configuring default AMF Set information at the network element of the public network.
In step 220, the public network AMF network element sends a request for querying the target AMF to the public network NSSF network element.
In some embodiments, after receiving a registration message sent by a user, the AMF element of the public network first authenticates the terminal, and then queries UDM (Unified DATA MANAGEMENT ) for subscription slice information of the user. And if the subscription slice of the user exists in the slice range which is not supported by the public network AMF network element, indicating that the public network AMF network element does not support the slice of the user, sending a network slice query request to the public network NSSF network element to query the target AMF.
In step 230, the public network NSSF determines whether an AMF suitable for providing services to the user can be found, if yes, step 270 is executed, otherwise, step 240 is executed.
In step 240, the public network NSSF network element returns default AMF Set information to the public network AMF network element.
In some embodiments, the public network NSSF network element returns the default AMF Set information to the public network AMF network element if the appropriate AMF is not found to provide the service for the user according to the slice information signed by the user and the slice information requested by the user.
In step 250, the public network AMF network element redirects the user to the private network gateway according to the received default AMF Set information.
In some embodiments, if only the AMF Set identifier exists in the AMF Set information, the public network AMF network element further needs to query and obtain specific AMF address information corresponding to the AMF Set in an NRF (Network Repository Function, network storage function) network element according to the AMF Set identifier; if the AMF Set information already includes the corresponding AMF address information, the public network AMF network element may directly initiate the redirection procedure.
At step 260, the private network gateway directs the user to access the appropriate private network slice.
In some embodiments, the private network element redirects the user to the appropriate private network AMF element according to the pre-configured slice identity, DNN (Data Network Name ) to private network AMF correspondence.
In some embodiments, the private network gateway receives a subscriber registration request redirection message including information such as slice identification, DNN, etc.
In some embodiments, after receiving the user registration request redirection message, the private network gateway sends an authentication query to the public network AMF, and receives a security context returned by the public network AMF and corresponding to the user registration request redirection message, so as to avoid re-authentication operation.
In step 270, access is made according to the normal procedure.
Because there are many private network AMF network elements, if the public network AMF network element directly searches the private network AMF network element, frequent data configuration is required for the public network NSSF network element. In this embodiment, the public network AMF network element does not need to perceive the private network AMF network element, and redirects the user to the private network gateway according to the received default AMF Set information, so that the influence of frequent modification of the private network slicing service on the public network can be avoided. In addition, because the communication between the public network element and the private network element is required to be carried out through the private network gateway, the private network gateway can carry out safety isolation on the communication of the public network element and the private network element, and therefore the safety risk of direct interconnection of the public network AMF and the private network AMF in the non-safety domain is avoided.
Fig. 3 is a flow chart illustrating other embodiments of the private network slice access method of the present disclosure.
In step 310, the public network NSSF network element configures default AMF Set information.
In step 320, the terminal initiates a registration request to the AMF element of the public network, optionally carrying a request NSSAI (Network Slice Selection Assistance Information ).
In step 330, authentication of the user is completed.
The terminal is matched with the public network AMF network element and AUSF (Authentication Server Function, authentication service function) network element to finish authentication of the user.
In step 340, the public network AMF element queries the UDM element for obtaining slice information for the subscription of the user.
In step 350, the public network AMF network element sends a slice selection request to the public network NSSF network element, where the request carries NSSAI and location information of the user subscription, and may also carry NSSAI of the request.
If the user does not have NSSAI of the reporting request, the public network AMF network element uses the default NSSAI for the user subscription.
In step 360, the public network NSSF network element cannot find a suitable AMF network element for the user according to the request NSSAI, the contracted NSSAI, the location, and other information.
In step 370, the public network NSSF network element returns a slice selection response to the public network AMF network element, where default AMF Set information is carried.
In step 380, the public network AMF network element redirects the registration request to the private network gateway according to the AMF Set information.
At step 390, the private network gateway redirects the registration request to the appropriate private network AMF.
At step 3100, the terminal accesses the private network AMF and completes the subsequent registration procedure.
After the private network AMF network element receives the registration request in the redirection message, the subsequent user registration process is completed, and the user successfully accesses the proper 5G private network.
In the above embodiment, the public network NSSF returns default AMF Set information when a suitable AMF cannot be found for the user, the public network AMF redirects the user registration message to the private network gateway, and the private network gateway selects to redirect to the suitable private network AMF, thereby avoiding the influence on the public network AMF caused by frequent modification of the private network slicing service.
Fig. 4 is a schematic structural diagram of some embodiments of a private network slice access device of the present disclosure. The device comprises a public network NSSF network element 410 and a public network AMF network element 420.
The public network NSSF network element 410 is configured to receive a target AMF query request sent by the public network AMF network element 420, and if the target AMF is not queried, return default AMF setting information to the public network AMF network element; the public network AMF network element 420 is configured to redirect the user registration message to a private network gateway according to AMF setting information, wherein the private network gateway is configured to direct the user to access the private network slice.
In some embodiments, the public network AMF network element 420 sends a query target AMF request to the public network NSSF network element 410 in the event that user slicing cannot be supported. The public network NSSF network element 410 can not find a proper AMF to provide service for the user according to the slicing information signed by the user and the slicing information requested by the user, and then returns the default AMF Set information to the public network AMF network element 420.
In some embodiments, the public network NSSF network element configures default AMF Set information, where the default AMF Set information includes an AMF Set identifier.
In some embodiments, the default AMF Set information also includes AMF address information, such as an AMF IP address.
In some embodiments, if only the AMF Set identifier exists in the AMF Set information, the public network AMF network element 420 needs to query and obtain specific AMF address information corresponding to the AMF Set from the NRF network element according to the AMF Set identifier; if the AMF Set information already includes the corresponding AMF address information, the public network AMF network element 420 may directly initiate the redirection procedure.
In some embodiments, the dedicated gateway redirects the user to the appropriate private network AMF according to pre-configured information. For example, according to the preset slice identifier and the corresponding relation between DNN and private network AMF, the user is redirected to the appropriate private network AMF network element.
In the above embodiment, the public network NSSF returns default AMF Set information when a suitable AMF cannot be found for the user, the public network AMF redirects the user registration message to the private network gateway, and the private network gateway selects to redirect to the suitable private network AMF, so that frequent changes of the private network slicing service can be prevented from affecting the public network.
In other embodiments of the present disclosure, a private network slice access system is also protected, where the system includes a public network NSSF network element and a public network AMF network element in the foregoing apparatus, and further includes a private network element configured to guide a user to access a private network slice.
Because the communication between the public network element and the private network element is required to be carried out through the private network gateway, the private network gateway can carry out safety isolation on the communication of the public network element and the private network element, and therefore, the safety risk of direct interconnection of the public network AMF and the private network AMF in the non-safety domain is avoided.
Fig. 5 is a schematic structural diagram of some embodiments of the electronic device of the present disclosure. The electronic device is located in a public network NSSF when executing the functions of the public network NSSF network element, is located in a public network AMF network element when executing the functions of the public network AMF network element, and is located in a private network element when executing the functions of the private network element.
The electronic device 500 includes a memory 510 and a processor 520. Wherein: memory 510 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory 510 is used to store instructions in the above-described embodiments. Processor 520 is coupled to memory 510 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 520 is configured to execute instructions stored in the memory.
In some embodiments, processor 520 is coupled to memory 510 by BUS 530. The electronic device 500 may also be connected to an external storage system 550 via a storage interface 540 for invoking external data, and may also be connected to a network or another computer system (not shown) via a network interface 560. And will not be described in detail herein.
In this embodiment, the data instruction is stored by the memory, and then the processor processes the instruction, so as to reduce the influence of frequent changes of the private network slicing service on the public network.
In other embodiments, a computer readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the methods of the above embodiments. It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, apparatus, 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, etc.) 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
Thus far, the present disclosure has been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (11)

1. A private network slice access method, comprising:
the public network slice selection function NSSF network element receives a query target AMF request sent by the public network access and mobility management function AMF network element;
If the public network NSSF network element does not inquire the target AMF, returning default AMF setting information to the public network AMF network element; and
And the public network AMF network element redirects the user registration message to a private network gateway according to the AMF setting information, wherein the private network gateway is configured to guide the user to access the private network slice.
2. The private network slice access method of claim 1, further comprising:
the public network NSSF network element configures the default AMF setting information, where the default AMF setting information includes an AMF setting identifier.
3. The private network slice access method of claim 2, wherein,
The default AMF setting information further includes AMF address information.
4. The private network slice access method of claim 2, wherein the redirecting the user registration message to the private network gateway by the public network AMF network element according to the AMF setting information comprises:
and the public network AMF network element queries AMF address information corresponding to the AMF setting identifier in a network storage function NRF network element, and redirects the user registration message to a private network gateway according to the AMF address information.
5. The private network slice access method of claim 3, wherein the redirecting the user registration message to the private network gateway by the public network AMF network element according to the AMF setting information comprises:
and the public network AMF network element redirects the user registration message to the private network gateway according to the AMF address information in the default AMF setting information.
6. The private network slice access method of claim 1, wherein,
And the public network NSSF network element searches the target AMF according to the slicing information signed by the user and the slicing information requested by the user.
7. The private network slice access method according to any one of claims 1 to 6, wherein,
And the public network AMF network element sends a query target AMF request to the public network NSSF network element under the condition that the public network AMF network element cannot support user slicing.
8. A private network slice access device, comprising:
The public network slice selection function NSSF is configured to receive a target AMF inquiry request sent by the public network access and mobility management function AMF network element, and if the target AMF is not inquired, the default AMF setting information is returned to the public network AMF network element; and
And the public network AMF network element is configured to redirect the user registration message to the private network gateway according to the AMF setting information, wherein the private network gateway is configured to guide the user to access the private network slice.
9. A private network slice access system, comprising:
the private network slice access device of claim 8; and
And the private network element is configured to guide the user to access the private network slice.
10. An electronic device, comprising:
A memory; and
A processor coupled to the memory, the processor configured to perform the private network slice access method of any one of claims 1 to 7 based on instructions stored in the memory.
11. A non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the private network slice access method of any one of claims 1 to 7.
CN202210688535.7A 2022-06-17 2022-06-17 Private network slice access method, device and system Active CN114980276B (en)

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