CN116567802A - Method for realizing 5G core network service interface slice error correction - Google Patents

Method for realizing 5G core network service interface slice error correction Download PDF

Info

Publication number
CN116567802A
CN116567802A CN202210110592.7A CN202210110592A CN116567802A CN 116567802 A CN116567802 A CN 116567802A CN 202210110592 A CN202210110592 A CN 202210110592A CN 116567802 A CN116567802 A CN 116567802A
Authority
CN
China
Prior art keywords
network element
udm
initial
smf
target
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210110592.7A
Other languages
Chinese (zh)
Inventor
曹静
吕春桃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Yunliantong Communication Service Co ltd
Original Assignee
Hytera Communications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hytera Communications Corp Ltd filed Critical Hytera Communications Corp Ltd
Priority to CN202210110592.7A priority Critical patent/CN116567802A/en
Priority to PCT/CN2023/072304 priority patent/WO2023143161A1/en
Publication of CN116567802A publication Critical patent/CN116567802A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/50—Service provisioning or reconfiguring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • H04W8/205—Transfer to or from user equipment or user record carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a method for realizing slice error correction of a 5G core network service interface. The method is applied to a 5G core network, the 5G core network including but not limited to an AMF network element, an NRF network element and at least one UDM network element. The method comprises the following steps: the AMF network element establishes a link relation with an initial UDM network element corresponding to the initial UDM information according to the initial UDM information fed back by the NRF network element, and sends a user registration request to the initial UDM network element when a user is online, wherein the user registration request comprises a subscription permanent identifier of the user; when the initial UDM network element refuses user registration according to the user registration request, the AMF network element sends a UDM service request containing a subscription permanent identifier to the NRF network element; the NRF network element determines a target UDM network element from all UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element so as to realize successful registration of the user. The invention can finish slice error correction on the premise of normal operation of the system, and realize normal online of users.

Description

Method for realizing 5G core network service interface slice error correction
Technical Field
The embodiment of the invention relates to the technical field of 5G core networks, in particular to a method for realizing slice error correction of a 5G core network service interface.
Background
The service interface function of the 5GC (5G Core Network) mainly takes NRF (Network Repository Function, network storage function) as a core, and the NRF network element supports a service discovery function to provide the discovered NF instance information to the NF instance requesting the discovery service. At present, NRF cannot ensure to select correct NF instance information in core network networking scenes with and without slicing network elements, which results in fuzzy networking of the system, and when a user is online, the problem of user online failure often occurs, and the elastic fault tolerance of the system is very weak.
Disclosure of Invention
The invention provides a method for realizing slice error correction of a 5G core network service interface, which is used for completing slice error correction on the premise of normal operation of a 5GC system and ensuring normal online of a user.
The embodiment of the invention provides a 5G core network user registration method, which comprises the following steps:
the AMF network element establishes a link relation with an initial UDM network element corresponding to the initial UDM information according to the initial UDM information fed back by the NRF network element, and sends a user registration request to the initial UDM network element when a user is online, wherein the user registration request comprises a subscription permanent identifier of the user;
when the initial UDM network element refuses user registration according to the user registration request, the AMF network element sends a UDM service request containing the subscription permanent identifier to the NRF network element;
and the NRF network element determines a target UDM network element from the UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element so as to realize successful registration of the user.
Optionally, before the AMF network element establishes a link relationship with the initial UDM network element corresponding to the initial UDM information according to the initial UDM information fed back by the NRF network element, the method further includes:
the AMF network element sends an initial UDM service request to the NRF network element, and the NRF network element determines the initial UDM network element from each UDM network element according to the UDM network element name.
Optionally, before the AMF network element sends an initial UDM service request to the NRF network element, the NRF network element determines the initial UDM network element from each UDM network element according to a UDM network element name, the method further includes:
the AMF network element registers service to the NRF network element;
each UDM network element registers service with the NRF network element respectively.
Optionally, the initial UDM network element refuses the user registration according to the user registration request, including:
the initial UDM network element determines a target slice to which the user belongs according to a subscription permanent identifier in the user registration request;
and if the target slice is inconsistent with the slice to which the initial UDM network element belongs, the initial UDM network element refuses the user registration.
Optionally, the NRF network element determines a target UDM network element from each UDM network element according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element, so as to implement successful registration of the user, including:
the NRF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the UDM service request, and determines the UDM network element of which the slice belongs to as the target slice as a target UDM network element;
the NRF network element sends target UDM information corresponding to the target UDM network element to the AMF network element;
the AMF network element sends a link establishment request to the target UDM network element according to the target UDM information, and the target UDM network element replies a link establishment response to the AMF network element;
and the AMF network element sends a user registration request to the target UDM network element, and the target UDM network element replies a registration success response to the AMF network element.
Optionally, the 5G core network further includes at least one SMF network element;
correspondingly, after the successful registration of the user is realized, the method further comprises the following steps:
and the AMF network element requests SMF service to the NRF network element according to the subscription permanent identifier of the user so as to realize the session creation of the user and the target SMF network element.
Optionally, before the AMF network element requests the SMF service from the NRF network element according to the subscription permanent identifier of the user, the method further includes:
the AMF network element sends a user session establishment request to an initial SMF network element corresponding to the initial SMF information according to the initial SMF information fed back by the NRF network element, wherein the user session establishment request comprises the subscription permanent identifier;
the initial SMF network element determines a target slice to which the user belongs according to a subscription permanent identifier in the user session establishment request;
and when the target slice is inconsistent with the slice to which the initial SMF network element belongs, the initial SMF network element refuses the session establishment.
Optionally, before the AMF network element sends the user session establishment request to the initial SMF network element corresponding to the initial SMF information according to the initial SMF information fed back by the NRF network element, the method further includes:
each SMF network element registers service to the NRF network element respectively;
and the NRF network element determines the initial SMF network element from the SMF network elements according to the SMF network element name.
Optionally, the AMF network element requests SMF service from the NRF network element according to the subscription permanent identifier of the user, so as to implement session creation between the user and the target SMF network element, including:
when the initial SMF network element searched by the NRF network element fails to establish a session with the AMF network element, the AMF network element sends an SMF service request containing the subscription permanent identifier to the NRF network element;
the NRF network element determines a target SMF network element from the SMF network elements according to the SMF service request, and returns target SMF information of the target SMF network element to the AMF network element;
and the AMF network element realizes the session creation between the user and the target SMF network element according to the target SMF information.
Optionally, the NRF network element determines a target SMF network element from the SMF network elements according to the SMF service request, including:
and the NRF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the SMF service request, and determines the SMF network element of which the slice belongs to as the target slice as a target SMF network element.
According to initial UDM information fed back by an NRF network element, an AMF network element in a 5G core network establishes a link relation with an initial UDM network element corresponding to the initial UDM information, and sends a user registration request to the initial UDM network element when a user is online, wherein the user registration request comprises a subscription permanent identifier of the user; when the initial UDM network element refuses user registration according to the user registration request, the AMF network element sends a UDM service request containing a subscription permanent identifier to the NRF network element; the NRF network element determines a target UDM network element from all UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element so as to realize successful registration of a user, solve the problem of user online failure caused by fuzzy networking of the existing core network system, realize automatic completion of slicing error correction on the premise of normal operation of a 5G core network and ensure the effect of normal online of the user.
Drawings
Fig. 1 is a flowchart of a method for implementing slice error correction of a 5G core network service interface according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a method for implementing slice error correction of a 5G core network service interface according to an embodiment of the present invention;
fig. 3 is a flowchart of another implementation method of slice error correction of a 5G core network user-servitization interface provided in an embodiment of the present invention;
fig. 4 is a schematic diagram of another implementation method of slice error correction of a 5G core network user-servitization interface according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings, and furthermore, embodiments of the present invention and features in the embodiments may be combined with each other without conflict.
Example 1
Fig. 1 is a flowchart of a method for implementing slice error correction of a 5G core network service interface, which is provided by an embodiment of the present invention, where the embodiment is applicable to a case of 5G core network user registration, the method may be applied to a 5G core network, and the 5G core network may include an AMF network element, an NRF network element, and at least one UDM network element, where each network element may be implemented by software and/or hardware.
As shown in fig. 1, the method specifically includes the following steps:
step 110, the AMF network element establishes a link relation with an initial UDM network element corresponding to the initial UDM information according to the initial UDM information fed back by the NRF network element, and sends a user registration request to the initial UDM network element when a user is online, wherein the user registration request comprises a subscription permanent identifier of the user.
Optionally, before step 110, the implementation method for error correction of the 5G core network servitization interface slice provided in this embodiment may further include the following steps:
the AMF network element sends an initial UDM service request to the NRF network element, and the NRF network element determines the initial UDM network element from all the UDM network elements according to the UDM network element names.
Further, before the AMF network element sends an initial UDM service request to the NRF network element, and the NRF network element determines the initial UDM network element from each UDM network element according to the UDM network element name, the method for implementing slice error correction of the 5G core network serviced interface provided in this embodiment may further include the following steps:
the AMF network element registers service to the NRF network element; each UDM network element registers services with the NRF network element, respectively.
Specifically, the AMF (Access and Mobility Management Function ) network element operates normally, and registers services with the NRF (Network Repository Function, network storage function) network element. The UDM (Unified Data Management ) network element operates normally, registering services with the NRF network element. The AMF network element requests UDM service to the NRF network element, and the AMF network element sends an initial UDM service request which does not carry home slice information of the network element to the NRF network element. The NRF network element determines an initial UDM network element from UDM network elements of the registered service according to the UDM network element name, for example, the NRF network element may search according to the UDM network element name, and determine the UDM network element corresponding to the first UDM information searched as the initial UDM network element.
When the NRF network element searches the initial UDM network element, returning initial UDM information corresponding to the initial UDM network element to the AMF network element. The initial UDM information may be service information of all the initial UDM network elements, and the service information may include information such as an IP address, a port number, and service capability of the UDM. After the AMF network element obtains the initial UDM information, a link establishment request is initiated to the initial UDM network element. The initial UDM network element receives the link establishment request of the AMF, replies a response of successfully establishing the link to the AMF network element, and establishes a link relation with the initial UDM network element.
When a user is online, the user sends online information containing a user subscription permanent identifier to an AMF network element. In this embodiment, the user's subscription permanent identifier may be a SUPI (Subscription Permanent Identifier) number. After the AMF network element obtains the subscription permanent identifier of the user, the AMF network element sends a user registration request to the initial UDM network element, wherein the user registration request comprises SUPI.
Optionally, after the AMF network element sends the user registration request to the initial UDM network element, the method for registering a 5G core network user provided in this embodiment may further include the following steps:
the initial UDM network element determines a target slice to which the user belongs according to the subscription permanent identifier in the user registration request; if the target slice is inconsistent with the slice to which the initial UDM network element belongs, the initial UDM network element refuses the user registration.
Specifically, when the initial UDM network element receives a user registration request sent by the AMF network element, a subscription permanent identifier is obtained from the user registration request, slice information to which the subscription permanent identifier belongs is determined, and the slice is marked as a target slice of the user. The initial UDM network element determines the slice information of the self attribution, judges whether the slice information is consistent with the target slice, and if the slice information is inconsistent with the target slice, the initial UDM network element refuses the user registration. It can be understood that the UDM network element may acquire and store subscription data including a subscription permanent identifier of a user, and periodically initiate a service update message to the NRF network element, and report slice information corresponding to the SUPI number.
And 120, when the initial UDM network element refuses the user registration according to the user registration request, the AMF network element transmits a UDM service request containing a subscription permanent identifier to the NRF network element.
Specifically, when the initial UDM network element determines, according to the subscription permanent identifier in the user registration request, that the slice to which the user belongs is inconsistent with the slice to which the user belongs, the initial UDM network element may return an error response to the AMF network element, and reject the user registration. When the AMF network element receives an error response returned by the initial UDM network element, a UDM service request containing a subscription permanent identifier may be sent to the NRF network element.
And 130, the NRF network element determines a target UDM network element from all the UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element so as to realize successful registration of the user.
The target UDM network element may be understood as a UDM network element consistent with the slice information to which the subscription permanent identifier of the user belongs.
Specifically, the NRF network element may determine, according to the subscription permanent identifier in the UDM service request sent by the AMF network element, a target UDM network element consistent with slice information to which the subscription permanent identifier belongs, and return target UDM information of the target UDM network element to the AMF network element, where the AMF network element may establish a link relationship with the target UDM network element according to the target UDM information, so as to complete a registration operation of the user.
Alternatively, step 130 may be implemented by the following specific steps:
s1301, the NRF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the UDM service request, and determines the UDM network element of which the slice belongs to the target slice as the target UDM network element.
S1302, the NRF network element sends target UDM information corresponding to the target UDM network element to the AMF network element.
S1303, the AMF network element sends a link establishment request to the target UDM network element, and the target UDM network element replies a link establishment response to the AMF network element.
S1304, the AMF network element sends a user registration request to the target UDM network element, and the target UDM network element replies a registration success response to the AMF network element.
Specifically, when the NRF network element receives a UDM service request sent by the AMF network element, a subscription permanent identifier may be obtained from the UDM service request, a target slice to which the user belongs is determined according to the subscription permanent identifier, and a UDM network element to which the slice belongs is the target slice is determined as the target UDM network element. And the NRF network element sends the target UDM information corresponding to the target UDM network element to the AMF network element. After the AMF network element establishes a link relation with the target UDM network element according to the target UDM information, a user registration request is sent to the target UDM network element, the target UDM network element judges that the slice to which the user belongs is consistent with the slice to which the user belongs according to the subscription permanent identifier in the user registration request, and the target UDM network element replies a registration success response to the AMF network element, and the user is registered successfully at the moment.
Fig. 2 is a schematic diagram of an implementation method of slice error correction of a 5G core network service interface according to an embodiment of the present invention. The AMF shown in fig. 2 represents an AMF network element, the NRF represents an NRF network element, and the UDM represents an initial UDM network element, where the initial UDM network element in this example is not the same UDM network element as the target UDM network element corresponding to the slice to which the SUPI number of the user belongs, and the main steps may include:
1) The initial UDM network element operates normally, and registers service to the NRF network element;
2) The AMF network element normally operates, and registers service to the NRF network element;
3) The AMF network element sends an initial UDM service request UDM Service Request to the NRF network element;
4) The NRF network element determines the UDM network element corresponding to the first searched UDM information as an initial UDM network element according to the network element name, loads UDM Service Response the initial UDM information corresponding to the initial UDM network element and returns the initial UDM information to the AMF network element;
5) The AMF network element initiates a link establishment request Nnrf_discovery_req to the initial UDM network element;
6) The initial UDM network element replies a response Nnrf_discovery_rsp for successfully establishing a link to the AMF network element, and the AMF network element establishes a link relation with the initial UDM network element;
7) When a user is online, an AMF network element acquires a subscription permanent identifier SUPI number of the user, and sends a user registration request User Register request (SUPI) containing a SUPI number segment to an initial UDM network element;
8) The initial UDM network element acquires the SUPI number from the user registration request, judges that the slice information to which the SUPI number belongs is inconsistent with the slice information to which the SUPI number belongs, and sends a response User Register response _Err for rejecting user registration to the AMF network element;
9) The AMF network element sends a UDM service request UDM Service Request (SUPI) containing a SUPI number segment to the NRF network element;
10 The NRF network element determines a target UDM network element according to the UDM service request, loads UDM Service Response target UDM information of the target UDM network element and returns the target UDM information to the AMF network element;
11 When the AMF network element obtains the target UDM information, the step similar to step 5) can be performed in a return mode, a link relation is established with the target UDM network element, and the registration operation of the user is completed.
The technical scheme of the embodiment is applied to a 5G core network, an AMF network element in the 5G core network establishes a link relation with an initial UDM network element corresponding to initial UDM information according to initial UDM information fed back by an NRF network element, and a user registration request is sent to the initial UDM network element when a user is online, wherein the user registration request comprises a subscription permanent identifier of the user; when the initial UDM network element refuses user registration according to the user registration request, the AMF network element sends a UDM service request containing a subscription permanent identifier to the NRF network element; the NRF network element determines a target UDM network element from all UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element so as to realize successful registration of a user, solve the problem of user online failure caused by fuzzy networking of the existing core network system, realize automatic completion of slicing error correction on the premise of normal operation of a 5G core network and ensure the effect of normal online of the user.
On the basis of the above technical solution, the 5G core network may further include at least one SMF network element. Correspondingly, the method provided by the embodiment of the invention can also realize the session creation of the user and the target SMF network element.
Fig. 3 is a flowchart of another implementation method of slice error correction for a 5G core network service interface according to an embodiment of the present invention. The embodiment further optimizes the implementation method of the 5G core network service interface slice error correction based on the embodiment.
As shown in fig. 3, the method specifically includes:
step 210, the AMF network element sends a user session establishment request to an initial SMF network element corresponding to the initial SMF information according to the initial SMF information fed back by the NRF network element, where the user session establishment request includes a subscription permanent identifier.
Optionally, before step 210, the method provided in this embodiment may further include the following steps:
each SMF network element registers service to NRF network element; the NRF network element determines an initial SMF network element from the SMF network elements according to the SMF network element names.
Specifically, the SMF (Session Management Function ) network element operates normally, and registers services with the NRF network element. The NRF network element determines an initial SMF network element from the SMF network elements according to the SMF network element name, for example, the NRF network element corresponding to the first SMF information may be searched according to the SMF network element name, and the SMF network element corresponding to the first SMF information is determined as the initial SMF network element. When the NRF network element searches the initial SMF network element, returning initial SMF information corresponding to the initial SMF network element to the AMF network element. The initial SMF information may be service information of all the initial SMF network elements, and the service information may include information such as an IP address, a port number, and a service capability of the SMF.
After the user is successfully registered, a session establishment flow is initiated, and a request message for user session establishment reaches an AMF network element through a base station. The AMF network element receives a session request of the terminal user, and initiates a user session establishment request to the initial SMF network element after obtaining the initial SMF information, wherein the user session establishment request can comprise a subscription permanent identifier of the user.
Step 220, the initial SMF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the user session establishment request, and when the target slice is inconsistent with the slice to which the initial SMF network element belongs, the initial SMF network element refuses the session establishment.
Specifically, when the initial SMF network element receives a user session establishment request sent by the AMF network element, a subscription permanent identifier is obtained from the user session establishment request, slice information to which the subscription permanent identifier belongs is determined, and the slice is recorded as a target slice of the user. The initial SMF network element determines the self-attributive slice information, judges whether the slice information is consistent with the target slice, if not, the initial SMF network element returns an error response to the AMF network element, and refuses the establishment of the session.
Step 230, the AMF network element requests the SMF service from the NRF network element according to the subscription permanent identifier of the user, so as to implement session creation between the user and the target SMF network element.
The target SMF network element may be understood as an SMF network element consistent with slice information to which the subscription permanent identifier of the user belongs.
Specifically, when the initial SMF network element refuses the session establishment, the AMF network element may request the SMF service to the NRF network element again according to the subscription permanent identifier when the AMF network element receives an error response returned by the initial SMF network element.
Alternatively, step 230 may be implemented by the following specific steps:
s2301, when the initial SMF network element searched by the NRF network element fails to create a session with the AMF network element, the AMF network element sends an SMF service request containing a subscription permanent identifier to the NRF network element.
Specifically, when the initial SMF network element returns an error response to the AMF network element and refuses to establish a session, the AMF network element loads a subscription permanent identifier of the user into an SMF service request and sends the subscription permanent identifier to the NRF network element.
S2302, the NRF network element determines a target SMF network element from the SMF network elements according to the SMF service request, and returns target SMF information of the target SMF network element to the AMF network element.
Further, the NRF network element determines a target SMF network element from the SMF network elements according to the SMF service request, which may be specifically implemented in the following manner: the NRF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the SMF service request, and determines the SMF network element of which the slice belongs to the target slice as a target SMF network element.
Specifically, the NRF network element may acquire the subscription permanent identifier from the SMF service request sent by the AMF network element, determine slice information to which the subscription permanent identifier belongs, and record the slice as a target slice of the user. The NRF network element may determine the SMF network element of which the slice belongs to as the target slice as the target SMF network element, and return target SMF information of the target SMF network element to the AMF network element.
S2303, the AMF network element realizes the session creation between the user and the target SMF network element according to the target SMF information.
Specifically, the AMF network element may send a user session establishment request to the target SMF network element according to the target SMF information, where the target SMF network element determines, according to a subscription permanent identifier in the user session establishment request, that a slice to which the user belongs is consistent with a slice to which the user belongs, and returns a successful response of session establishment to the AMF network element, where the user session establishment is completed.
Fig. 4 is a schematic diagram of another implementation method of slice error correction of a 5G core network service interface according to an embodiment of the present invention. The AMF shown in fig. 4 represents an AMF network element, the NRF represents an NRF network element, the UDM represents a target UDM network element consistent with a slice to which the SUPI number of the user belongs, the SMF represents an initial SMF network element, and the initial SMF network element in this example is not the same SMF network element as the target SMF network element corresponding to the slice to which the SUPI number of the user belongs, and the main steps may include:
1) The target UDM network element operates normally, and registers service to the NRF network element;
2) The AMF network element normally operates, and registers service to the NRF network element;
3) The initial UDM network element operates normally, and registers service to the NRF network element;
4) The AMF network element requests UDM information from the NRF network element, and the user registration process is successfully completed;
5) The AMF network element sends a user session establishment request PDU Session Establishment Request to the initial SMF network element;
6) The initial SMF network element acquires the SUPI number from the user session establishment request, judges that the slice information to which the SUPI number belongs is inconsistent with the slice information to which the SUPI number belongs, and sends a refusal session establishment response PDU Session Establishment Response _Err to the AMF network element;
7) The AMF network element sends an SMF service request SMF Service Request (SUPI) containing a SUPI number segment to the NRF network element;
8) The NRF network element determines a target SMF network element according to the SMF service request, loads SMF Service Response target SMF information of the target SMF network element and returns the target SMF information to the AMF network element;
9) When the AMF network element obtains the target SMF information, the step similar to 5) may be performed in a return manner, and a user session establishment request is sent to the target SMF network element, so as to complete the session creation operation of the user.
The technical scheme of the embodiment is applied to a 5G core network, an AMF network element in the 5G core network sends a user session establishment request to an initial SMF network element corresponding to initial SMF information according to initial SMF information fed back by an NRF network element, wherein the user session establishment request comprises a subscription permanent identifier; the initial SMF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the user session establishment request, and when the target slice is inconsistent with the slice to which the initial SMF network element belongs, the initial SMF network element refuses the session establishment; AMF network element requests SMF service to NRF network element according to user subscription permanent identifier to realize user and target SMF network element session creation, solve user online failure problem caused by current core network system networking ambiguity, realize automatic slice error correction under 5G core network normal operation premise, ensure user normal online and create session effect.
It should be noted that, in the above embodiment, each unit and module included are only divided according to the functional logic, but not limited to the above division, so long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. The method for implementing the slice error correction of the 5G core network service interface is applied to a 5G core network, and the 5G core network comprises an AMF network element, an NRF network element and at least one UDM network element, and is characterized by comprising the following steps:
the AMF network element establishes a link relation with an initial UDM network element corresponding to the initial UDM information according to the initial UDM information fed back by the NRF network element, and sends a user registration request to the initial UDM network element when a user is online, wherein the user registration request comprises a subscription permanent identifier of the user;
when the initial UDM network element refuses user registration according to the user registration request, the AMF network element sends a UDM service request containing the subscription permanent identifier to the NRF network element;
and the NRF network element determines a target UDM network element from the UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element so as to realize successful registration of the user.
2. The method for implementing slice error correction of a 5G core network servitization interface according to claim 1, wherein before the AMF network element establishes a link relationship with an initial UDM network element corresponding to the initial UDM information according to the initial UDM information fed back by the NRF network element, further comprising:
the AMF network element sends an initial UDM service request to the NRF network element, and the NRF network element determines the initial UDM network element from each UDM network element according to the UDM network element name.
3. The method for implementing slice error correction of a 5G core network servitization interface according to claim 2, wherein before the AMF network element sends an initial UDM service request to the NRF network element, the NRF network element determines the initial UDM network element from each UDM network element according to a UDM network element name, further comprising:
the AMF network element registers service to the NRF network element;
each UDM network element registers service with the NRF network element respectively.
4. The method for implementing slice error correction of a 5G core network servitization interface according to claim 1, wherein the initial UDM network element refuses user registration according to the user registration request, comprising:
the initial UDM network element determines a target slice to which the user belongs according to a subscription permanent identifier in the user registration request;
and if the target slice is inconsistent with the slice to which the initial UDM network element belongs, the initial UDM network element refuses the user registration.
5. The method for implementing slice error correction of a 5G core network servitization interface according to claim 1, wherein the NRF network element determines a target UDM network element from the UDM network elements according to the UDM service request, and returns target UDM information of the target UDM network element to the AMF network element, so as to implement successful registration of the user, including:
the NRF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the UDM service request, and determines the UDM network element of which the slice belongs to as the target slice as a target UDM network element;
the NRF network element sends target UDM information corresponding to the target UDM network element to the AMF network element;
the AMF network element sends a link establishment request to the target UDM network element according to the target UDM information, and the target UDM network element replies a link establishment response to the AMF network element;
and the AMF network element sends a user registration request to the target UDM network element, and the target UDM network element replies a registration success response to the AMF network element.
6. The method for implementing slice error correction of a 5G core network servitization interface of claim 1, wherein the 5G core network further comprises at least one SMF network element;
correspondingly, after the successful registration of the user is realized, the method further comprises the following steps:
and the AMF network element requests SMF service to the NRF network element according to the subscription permanent identifier of the user so as to realize the session creation of the user and the target SMF network element.
7. The method for implementing 5G core network servitization interface slice error correction according to claim 6, wherein before the AMF network element requests SMF service from the NRF network element according to the subscription permanent identifier of the user, further comprising:
the AMF network element sends a user session establishment request to an initial SMF network element corresponding to the initial SMF information according to the initial SMF information fed back by the NRF network element, wherein the user session establishment request comprises the subscription permanent identifier;
the initial SMF network element determines a target slice to which the user belongs according to a subscription permanent identifier in the user session establishment request;
and when the target slice is inconsistent with the slice to which the initial SMF network element belongs, the initial SMF network element refuses the session establishment.
8. The method for implementing slice error correction of a 5G core network servitization interface according to claim 7, wherein before the AMF network element sends a user session establishment request to an initial SMF network element corresponding to the initial SMF information according to the initial SMF information fed back by the NRF network element, the method further comprises:
each SMF network element registers service to the NRF network element respectively;
and the NRF network element determines the initial SMF network element from the SMF network elements according to the SMF network element name.
9. The method for implementing slice error correction of a 5G core network servitization interface according to claim 6, wherein the AMF network element requests SMF service to the NRF network element according to a subscription permanent identifier of the user, so as to implement session creation between the user and a target SMF network element, comprising:
when the initial SMF network element searched by the NRF network element fails to establish a session with the AMF network element, the AMF network element sends an SMF service request containing the subscription permanent identifier to the NRF network element;
the NRF network element determines a target SMF network element from the SMF network elements according to the SMF service request, and returns target SMF information of the target SMF network element to the AMF network element;
and the AMF network element realizes the session creation between the user and the target SMF network element according to the target SMF information.
10. The method for implementing 5G core network servitization interface slice error correction according to claim 9, wherein the NRF network element determines a target SMF network element from the SMF network elements according to the SMF service request, comprising:
and the NRF network element determines a target slice to which the user belongs according to the subscription permanent identifier in the SMF service request, and determines the SMF network element of which the slice belongs to as the target slice as a target SMF network element.
CN202210110592.7A 2022-01-29 2022-01-29 Method for realizing 5G core network service interface slice error correction Pending CN116567802A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210110592.7A CN116567802A (en) 2022-01-29 2022-01-29 Method for realizing 5G core network service interface slice error correction
PCT/CN2023/072304 WO2023143161A1 (en) 2022-01-29 2023-01-16 Implementation method for 5g core network service interface slice error correction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210110592.7A CN116567802A (en) 2022-01-29 2022-01-29 Method for realizing 5G core network service interface slice error correction

Publications (1)

Publication Number Publication Date
CN116567802A true CN116567802A (en) 2023-08-08

Family

ID=87470508

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210110592.7A Pending CN116567802A (en) 2022-01-29 2022-01-29 Method for realizing 5G core network service interface slice error correction

Country Status (2)

Country Link
CN (1) CN116567802A (en)
WO (1) WO2023143161A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118317281A (en) * 2024-06-07 2024-07-09 中国电信股份有限公司 Network element discovery method, terminal registration method and related equipment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112087770B (en) * 2019-06-13 2022-05-17 华为技术有限公司 Method, communication system and communication device for notifying service state
WO2021168829A1 (en) * 2020-02-28 2021-09-02 华为技术有限公司 User identifier verification method and related device
CN113098726B (en) * 2021-06-10 2021-09-03 深圳艾灵网络有限公司 Network slicing method, device and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118317281A (en) * 2024-06-07 2024-07-09 中国电信股份有限公司 Network element discovery method, terminal registration method and related equipment

Also Published As

Publication number Publication date
WO2023143161A1 (en) 2023-08-03

Similar Documents

Publication Publication Date Title
US8831606B2 (en) Mobile terminal registration method in a radio network
US7441269B2 (en) Method and system for session accounting in wireless networks
KR100658650B1 (en) A process method about the service connection between the wireless local area network and user terminal
US20220303753A1 (en) Data Processing Method and Apparatus, and System
US20220159536A1 (en) Network function database, mobile communication network component, method for selecting a network function and method for registering a network function
CN113260010B (en) SMF discovery method, device, electronic equipment and medium
WO2019179423A1 (en) Card calling method and device, information pushing method and device, and card allocation system
CN112218342A (en) Method, device and system for realizing core network sub-slice disaster tolerance
WO2022052875A1 (en) Terminal cross-region communication method, network element device, and storage medium
US20230370823A1 (en) Network capability exposure method, device, and storage medium
CN116567802A (en) Method for realizing 5G core network service interface slice error correction
EP1450519A2 (en) Context synchronization method in mobile communication system
JP2002523998A (en) Tracking signal messages
WO2015154426A1 (en) Method and device for prose temporary identifier notification and update
WO2009009938A1 (en) A method for routing when a service is activated by a mobile terminal in a radio network
CN112968868B (en) Service opening method and device
US20090059840A1 (en) Wireless communication system and method for managing service flow identifier in the same
RU2299519C2 (en) Method for assigning payment in communication networks
CN111970695B (en) 5G charging domain user privacy protection method, charging system and core network system
JP6807952B2 (en) Methods and devices for determining the communication network that provides communication services to terminal communication devices
EP1472827A2 (en) Optimization of point-to-point sessions
CN112911554A (en) Method, device and terminal for service fulfillment
WO2008154834A1 (en) Method and equipment for transmitting user number
KR20030040619A (en) Method of Identifying Account Session of RADIUS Server in Mobile Telephone Packet Data Network
WO2021259026A1 (en) Charging notification function entity, charging function entity, call detail record processing method and apparatus, and storage medium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right

Effective date of registration: 20240625

Address after: 518000, West Side of 3rd Floor, Hainengda Building, No. 9108 North Ring Road, North Zone, High tech Zone, Nanshan District, Shenzhen, Guangdong Province

Applicant after: Shenzhen Yunliantong Communication Service Co.,Ltd.

Country or region after: China

Address before: 518000 hainengda building, 9108 North Ring Road, north high tech Zone, Nanshan District, Shenzhen City, Guangdong Province

Applicant before: HYTERA COMMUNICATIONS Corp.,Ltd.

Country or region before: China

TA01 Transfer of patent application right