CN115397041A - Method, device, equipment and storage medium for automatic reconstruction after changing virtual network group - Google Patents
Method, device, equipment and storage medium for automatic reconstruction after changing virtual network group Download PDFInfo
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Abstract
The invention provides a method, a device, equipment and a storage medium for automatically reconstructing after changing a virtual network group, wherein the method comprises the following steps: the session management function network element receives subscription modification information sent by the unified data management function network element, and the subscription modification information indicates that the user equipment is changed from a first virtual network group to a second virtual network group; the session management function network element generates protocol data unit session release control information based on the subscription modification information, wherein the protocol data unit session release control information comprises a reason value, and the reason value is set to indicate a request for reestablishing the protocol data unit session; the session management function network element sends the protocol data unit session release control information to the user equipment so as to release the first protocol data unit session based on the first virtual network group, and the session release control information is set as a cause value indicating a request for reestablishing the protocol data unit session so that the user equipment can establish a second protocol data unit session based on the second virtual network group. The invention enables the user equipment to automatically reestablish the session when the virtual network group is changed.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, a device, and a storage medium for automatic reconfiguration after changing a virtual network group.
Background
The 3gpp r16 protocol defines new characteristics of a 5G LAN (Local Area Network). An operator provides 5G LAN services for local area networks in vertical industries such as industrial internet, enterprise office, and home environment, and similar to local area networks or VPN (Virtual Private Network) type services, a customer can customize a 5G LAN communication group according to actual needs, and point-to-point or point-to-multipoint communication, including ethernet communication and IP communication, can be performed between UEs (user equipment) in the group and the user equipment.
In the current 5G LAN standard of R16 and R17, an industry client can dynamically sign a subscription at a UDM (Unified Data Management Function Network element) through an AF (Application Function Network)/NEF (Network Exposure Function Network element) or an operator statically signs a subscription at a UDM (virtual Network) group according to a client requirement, including a VN group identifier, a group member, a group Data (slice, a DNN (Data Network Name), a Data Network Name, and the like). When the User equipment establishes a session, the subscription information is sent from the UDM to an SMF (session management Function network element) to generate a forwarding rule of a UPF (User Plane Function network element), thereby providing a forwarding Function that a packet of the VN group does not leave the campus.
The subscription information may be dynamically or statically updated on the UDM if a change has occurred to the VN group to which a user device belongs, such as from VN group 1 (VN 1) to VN group 2 (VN 2). Because the VN group and the DNN, S-NSSAI (Single Network Slice Selection) are 1-to-1 bound, once the VN1 is not signed, the session of the VN1 is released, and the current 3GPP standard does not require the user equipment to automatically establish the session of the VN2, and does not have a corresponding flow, which affects the service use of the user equipment.
Therefore, how to enable the user equipment to automatically reestablish the session when the virtual network group is changed is a technical problem that needs to be solved urgently by those skilled in the art.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the invention and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The present invention is directed to a method, an apparatus, a device, and a storage medium for automatically reconstructing a virtual network group after changing the virtual network group, which overcome the difficulties of the prior art and enable a user equipment to automatically reconstruct a session when changing the virtual network group.
The embodiment of the invention provides a method for automatically reconstructing a changed virtual network group, which comprises the following steps:
a session management function network element receives subscription modification information sent by a unified data management function network element, wherein the subscription modification information indicates that user equipment is changed from a first virtual network group to a second virtual network group;
the session management function network element generates protocol data unit session release control information based on the subscription modification information, wherein the protocol data unit session release control information comprises a reason value, and the reason value is set to indicate a protocol data unit session reestablishment request;
the session management function network element sends the pdu session release control information to the ue to release a first pdu session based on the first vpn group, and the cause value set to indicate a pdu session reestablishment request is provided for the ue to establish a second pdu session based on the second vpn group.
In some embodiments of the present application, before the receiving, by the session management function network element, the subscription modification information sent by the unified data management function network element, the method includes:
and the session management function network element is registered in the unified data management function network element.
In some embodiments of the present application, before the receiving, by the session management function network element, the subscription modification information sent by the unified data management function network element, the method includes:
and the session management function network element subscribes subscription modification information of the unified data management function network element.
In some embodiments of the present application, after the receiving, by the session management function network element, the subscription modification information sent by the unified data management function network element, the method includes:
responding to the user routing strategy supported by the user equipment, and sending the signing modification information to a strategy control function network element by the unified data management function network element;
and the strategy control function network element generates a user routing strategy and sends the user routing strategy to the user equipment.
In some embodiments of the present application, the user routing policy includes a data network name of the second virtual network group and single network slice selection assistance information.
In some embodiments of the present application, in response to the user equipment receiving protocol data unit session release control information for which a cause value is set to indicate a request to reestablish a protocol data unit session, the user equipment establishes a second protocol data unit session based on a data network name of the second virtual network group and single network slice selection assistance information in the user routing policy.
In some embodiments of the present application, in response to the user equipment not supporting a user routing policy, the user equipment interacts with an access and mobility management function network element to establish a second protocol data unit session.
According to another aspect of the present application, there is provided an apparatus for automatic reconstruction after changing a virtual network group, including:
the session management function network element is configured to receive subscription modification information sent by the unified data management function network element, wherein the subscription modification information indicates that the user equipment is changed from a first virtual network group to a second virtual network group;
a first generating module configured to generate, by a session management function network element, protocol data unit session release control information based on the subscription modification information, the protocol data unit session release control information including a cause value, the cause value being set to indicate a request to reestablish a protocol data unit session;
a first sending module, configured to send, by the session management function network element, the pdu session release control information to the ue to release a first pdu session based on the first virtual network group, the cause value set to indicate a request to reestablish a pdu session being provided for the ue to establish a second pdu session based on the second virtual network group.
According to another aspect of the present invention, there is provided a processing device for automatic reconfiguration after a virtual network group is changed, including:
a processor;
a memory having stored therein executable instructions of the processor;
wherein the processor is configured to perform the steps of the method for automatic re-establishment after a virtual network group change as described above via execution of the executable instructions.
The embodiment of the present invention further provides a computer-readable storage medium for storing a program, where the program implements the steps of the method for automatically reconstructing after changing the virtual network group when executed.
Compared with the prior art, the invention aims to:
the modification operation of the virtual network group is carried out on the subscription information of the user on the uniform data management function network element, the session management function network element triggers the session release initiated by the network side, and the protocol data unit session is required to be automatically reconstructed by carrying a special reason value. Therefore, the special release reason value can be issued by the network, and after the user equipment is required to release the first protocol data unit session of the first virtual network group, the second protocol data unit session of the first virtual network group can be automatically reestablished, so that the influence of service interruption when the subscription change of the virtual network group to which the user equipment belongs is reduced.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
Fig. 1 is a flowchart of an embodiment of a method for automatic reconfiguration after changing a virtual network group according to the present invention.
Fig. 2 is a timing diagram illustrating an embodiment of the method for automatic reconfiguration after changing a virtual network group according to the present invention.
Fig. 3 is a timing diagram illustrating another embodiment of the method for automatic reconfiguration after changing virtual network groups according to the present invention.
Fig. 4 is a block diagram of an apparatus for automatic reconfiguration after changing a virtual network group according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an apparatus for automatic reconstruction after a virtual network group is changed according to the present invention.
Fig. 6 is a schematic structural diagram of a computer-readable storage medium according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
Referring now to fig. 1, fig. 1 is a flow chart illustrating an embodiment of a method for automatic reconfiguration after changing a virtual network group according to the present invention. The embodiment of the invention provides a method for automatically reconstructing a changed virtual network group, which comprises the following steps:
step S110: the session management function network element receives subscription modification information sent by the unified data management function network element, wherein the subscription modification information indicates that the user equipment is changed from a first virtual network group to a second virtual network group;
step S120: the session management function network element generates protocol data unit session release control information based on the subscription modification information, wherein the protocol data unit session release control information comprises a cause value, and the cause value is set to indicate a protocol data unit session reestablishment request;
step S130: the session management function network element sends the pdu session release control information to the ue to release the first pdu session based on the first vlan group, and the cause value set to indicate a pdu session reestablishment request is provided for the ue to establish a second pdu session based on the second vlan group.
Therefore, the subscription information of the user is modified by the virtual network group on the uniform data management function network element, the session management function network element triggers the session release initiated by the network side, and the protocol data unit session carrying the special cause value is required to be automatically reconstructed. Therefore, the special release reason value can be issued by the network, and after the user equipment is required to release the first protocol data unit session of the first virtual network group, the second protocol data unit session of the first virtual network group can be automatically reestablished, so that the influence of service interruption when the subscription change of the virtual network group to which the user equipment belongs is reduced.
At present, if a user equipment wants to use a 5G LAN service, session data of a VN which is statically signed up or dynamically signed up through an AF/NEF must be maintained on a UDM by operation, and main session parameters of the VN related to the user equipment are shown in the following table:
if a VN group change is made to the user equipment, such as from a first virtual network group (VN 1) to a second virtual network group (VN 2), this can be done by modifying at least one parameter of DNN, S-NSSAI and the internal group identification (internalGroupIds).
However, since DNN and S-NSSAI are changed, if the ue has already established the session, the session is triggered to be released by the network side, and the current reason values for session release include:
#8operator determined barring；
#26insufficient resources；
#29user authentication or authorization failed；
#36regular deactivation；
#38network failure；
#39reactivation reqUEsted；
#46out of LADN service area；
#67insufficient resources for specific slice and DNN；
#69insufficient resources for specific slice.
in order to enable the ue to recover the service as soon as possible, when the network releases the session, it is desirable that the ue can automatically re-establish a new session, and among the above cause values, the cause value for the ue to re-establish the session is #39, but for #39,3GPP, the processing required after the ue receives is to re-activate the original session, where the DNN and S-NSSAI values are not changed (3 gpp ts24.501):
If the PDU SESSION RELEASE COMMAND message includes5GSM cause#39"reactivation reqUEsted",then after completion of the network-reqUE sted PDU session release procedure,the UE should re-initiate the UE-reqUEsted PDU session establishment procedure as specified in subclause 6.4.1for:
a)the PDU session type associated with the released PDU session；
b)the SSC mode associated with the released PDU session；
c)the DNN associated with the released PDU session；and
d)the S-NSSAI associated with(if available in roaming scenarios)a mapped S-NSSAI if provided in the UE-reqUEsted PDU session establishment procedure of the released PDU session.
therefore, according to the existing standard requirements, the ue cannot automatically re-establish the updated second pdu session of the second virtual network group, and when the ue triggers the second pdu session of the second virtual network group depends on the implementation of the ue (some ues can automatically trigger, and some ues need to trigger when initiating a service, thereby losing data when called).
The application adds a reason value when the network releases the session: and re-establishing a new session after the session is released by the re-examination PDU session request, wherein the information carried in the new session establishment has no requirement for the released session to have a correlation relationship, so that the user equipment can automatically reestablish the protocol data unit session when the virtual network group is changed.
Fig. 2 is a timing diagram illustrating an embodiment of the method for automatic reconfiguration after changing the virtual network group according to the present invention. Fig. 2 shows the timing interactions between a user equipment 201, AN R (AN) ((radio) access network) 202, AN access and mobility management function network element (AMF) 203, a session management function network element (SMF) 204, a policy control function network element (PCF) 205 and a unified data management function network element (UDM).
Step S210: the user equipment 201 has established a first protocol data unit session based on the first virtual network group, and the session management function network element 204 is registered with the unified data management function network element 206. The session management function network element 204 may subscribe to subscription modification information of the unified data management function network element 206.
Step S220: the unified data management function network element 206 modifies the subscription information of the user equipment 201, so that the user equipment 201 changes from the first virtual network group subscribed to the second virtual network group, and sets a data network name and single network slice selection auxiliary information corresponding to the second virtual network group.
Step S230: the unified data management function network element 206 sends the subscription modification information carrying the data network name of the second virtual network group and the single network slice selection auxiliary information to the session management function network element 204 and the access and mobility management function network element 203.
Step S240: the session management function network element 204 triggers the pdu session release control information and makes the pdu session release control information include a cause value indicating a request to reestablish a pdu session, and the session management function network element 204 sends the session release control information to the user equipment 201.
Step S250: the user equipment 201 interacts with the access and mobility management function network element 203 to establish a second protocol data unit session based on a second virtual network group for the user equipment 201 by the access and mobility management function network element 203.
In the embodiment shown in fig. 2, the user equipment may not support a user routing Policy (URSP). When the user equipment supports the user routing policy, a timing chart of the method for automatic reconfiguration after changing the virtual network group can be seen in fig. 3.
Fig. 3 shows the timing interaction between a user equipment 201, AN R (AN) ((radio) access network) 202, AN access and mobility management function network element (AMF) 203, a session management function network element (SMF) 204, a policy control function network element (PCF) 205 and a unified data management function network element (UDM).
Step S210: the user equipment 201 has established a first protocol data unit session based on the first virtual network group, and the session management function network element 204 is registered with the unified data management function network element 206. The session management function network element 204 may subscribe to subscription modification information of the unified data management function network element 206.
Step S220: the unified data management function network element 206 modifies the subscription information of the user equipment 201, so that the user equipment 201 changes from the first virtual network group subscribed to the second virtual network group, and sets a data network name and single network slice selection auxiliary information corresponding to the second virtual network group.
Step S230: the unified data management function network element 206 sends the subscription modification information carrying the data network name of the second virtual network group and the single network slice selection auxiliary information to the session management function network element 204 (and the access and mobility management function network element 203).
Step S240: the session management function network element 204 triggers the pdu session release control information and makes the pdu session release control information include a cause value indicating a request to reestablish a pdu session, and the session management function network element 204 sends the session release control information to the user equipment 201.
Step S241: the unified data management function network element 206 sends the subscription modification information carrying the data network name of the second virtual network group and the single network slice selection auxiliary information to the policy control function network element 205.
Step S242: the policy control function network element 205 generates a user routing policy for the user equipment 201 based on the subscription information.
Step S243: the policy control function network element 205 sends the user routing policy to the user equipment 201.
Step S251: the user equipment 201 establishes a second pdu session for the second vpn group based on the data network name and the single network slice selection assistance information for the second vpn group in the user routing policy.
The above description is only for exemplary purposes and does not limit the present invention, and the splitting, merging, execution sequence variation, module splitting, merging, and information transmission variation of the steps are within the protection scope of the present invention.
Fig. 4 is a block diagram of an apparatus for automatic reconfiguration after changing a virtual network group according to an embodiment of the present invention. The apparatus 300 for automatic reconstruction after changing virtual network groups according to the present invention, as shown in fig. 4, includes, but is not limited to, a first receiving module 310, a first generating module 320, and a first transmitting module 330.
The first receiving module 310 is configured to receive, by a session management function network element, subscription modification information sent by a unified data management function network element, where the subscription modification information indicates that a user equipment is changed from a first virtual network group to a second virtual network group;
the first generating module 320 is configured to generate, by the session management function network element, pdu session release control information based on the subscription modification information, the pdu session release control information including a cause value, the cause value being set to indicate a request to reestablish an pdu session;
the first sending module 330 is configured to send, by the session management function network element, the pdu session release control information to the ue to release the first pdu session based on the first virtual network group, the cause value set to indicate a request to reestablish a pdu session for the ue to establish a second pdu session based on the second virtual network group.
The implementation principle of the above modules refers to related introduction in the method for automatically reconstructing after changing the virtual network group, and is not described herein again.
The device for automatically reconstructing after changing the virtual network group carries out modification operation of the virtual network group on the subscription information of the user on the network element with the unified data management function, triggers session release initiated by a network side by the network element with the session management function, and requires protocol data unit session to be automatically reconstructed by carrying special cause values. Therefore, the special release reason value can be issued by the network, and after the user equipment is required to release the first protocol data unit session of the first virtual network group, the second protocol data unit session of the first virtual network group can be automatically reestablished, so that the influence of service interruption when the subscription change of the virtual network group to which the user equipment belongs is reduced.
Fig. 4 is a schematic diagram respectively illustrating the apparatus 300 for automatic reconstruction after changing the virtual network group provided by the present invention, and the splitting, merging, and adding of modules are within the scope of the present invention without departing from the concept of the present invention. The apparatus 300 for automatically reconstructing after changing the virtual network group according to the present invention may be implemented by software, hardware, firmware, plug-in, or any combination thereof, which is not limited to the above.
The embodiment of the invention also provides a processing device for automatically reconstructing after the virtual network group is changed, which comprises a processor. A memory having stored therein executable instructions of the processor. Wherein the processor is configured to perform the steps of the method for automatic re-establishment after a virtual network group change, via execution of the executable instructions.
As shown above, in the processing device for automatically reconstructing after changing the virtual network group according to the embodiment of the present invention, the modification operation of the virtual network group is performed on the subscription information of the user on the unified data management function network element, the session management function network element triggers the session release initiated by the network side, and the session carrying the special cause value requires the protocol data unit to automatically reconstruct. Therefore, the special release reason value can be issued by the network, and after the user equipment is required to release the first protocol data unit session of the first virtual network group, the second protocol data unit session of the first virtual network group can be automatically reestablished, so that the influence of service interruption when the subscription change of the virtual network group to which the user equipment belongs is reduced.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" platform.
Fig. 5 is a schematic structural diagram of a processing device for automatic reconstruction after changing a virtual network group according to the present invention. An electronic device 800 according to this embodiment of the invention is described below with reference to fig. 5. The electronic device 800 shown in fig. 5 is only an example and should not bring any limitations to the functionality and scope of use of the embodiments of the present invention.
As shown in fig. 5, the electronic device 800 is in the form of a general purpose computing device. The components of the electronic device 800 may include, but are not limited to: at least one processing unit 810, at least one memory unit 820, a bus 830 connecting the various platform components (including the memory unit 820 and the processing unit 810), a display unit 840, and the like.
Wherein the storage unit stores program code, which can be executed by the processing unit 810, to cause the processing unit 810 to execute the steps according to various exemplary embodiments of the present invention described in the method section of automatic re-establishment after changing virtual network groups described above in this specification. For example, processing unit 810 may perform the steps as shown in fig. 2.
The storage unit 820 may include readable media in the form of volatile memory units such as a random access memory unit (RAM) 8201 and/or a cache memory unit 8202, and may further include a read only memory unit (ROM) 8203.
The storage unit 820 may also include a program/utility 8204 having a set (at least one) of program modules 8205, such program modules 8205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 800 may also communicate with one or more external devices 8001 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 800, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 800 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 850. Also, the electronic device 800 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) via the network adapter 860. The network adapter 860 may communicate with other modules of the electronic device 800 via the bus 830. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 800, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.
The embodiment of the invention also provides a computer readable storage medium for storing a program, and the program is used for realizing the steps of the method for automatically reconstructing after changing the virtual network group when being executed. In some possible embodiments, the aspects of the present invention may also be implemented in the form of a program product, which includes program code for causing a terminal device to perform the steps according to various exemplary embodiments of the present invention described in the method section of changing a virtual network group described above in this specification when the program product is run on the terminal device.
As shown above, in the computer-readable storage medium for performing automatic reestablishment after changing the virtual network group in this embodiment, the modification operation of the virtual network group is performed on the subscription information of the user on the unified data management function network element, the session release initiated by the network side is triggered by the session management function network element, and the session carrying the special cause value requires that the protocol data unit session is automatically reestablished. Therefore, the special release reason value can be issued by the network, and after the user equipment is required to release the first protocol data unit session of the first virtual network group, the second protocol data unit session of the first virtual network group can be automatically reestablished, so that the influence of service interruption when the subscription change of the virtual network group to which the user equipment belongs is reduced.
Fig. 6 is a schematic structural diagram of a computer-readable storage medium of the present invention. Referring to fig. 6, a program product 900 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
In summary, the modification operation of the virtual network group is performed on the subscription information of the user on the unified data management function network element, the session management function network element triggers the session release initiated by the network side, and the session carrying the special cause value requires the protocol data unit to be automatically reconstructed. Therefore, the special release reason value can be issued by the network, and after the user equipment is required to release the first protocol data unit session of the first virtual network group, the second protocol data unit session of the first virtual network group can be automatically reestablished, so that the influence of service interruption when the subscription change of the virtual network group to which the user equipment belongs is reduced.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.
Claims (10)
1. A method for automatic reconstruction after changing virtual network group is characterized by comprising the following steps:
a session management function network element receives subscription modification information sent by a unified data management function network element, wherein the subscription modification information indicates that user equipment is changed from a first virtual network group to a second virtual network group;
the session management function network element generates protocol data unit session release control information based on the subscription modification information, wherein the protocol data unit session release control information comprises a cause value, and the cause value is set to indicate a protocol data unit session reestablishment request;
the session management function network element sends the pdu session release control information to the ue to release the first pdu session based on the first vlan group, and the cause value set to indicate a pdu session reestablishment request is provided for the ue to establish a second pdu session based on the second vlan group.
2. The method of claim 1, wherein before the session management function network element receives the subscription modification information sent by the unified data management function network element, the method comprises:
and the session management function network element is registered in the unified data management function network element.
3. The method for automatically reestablishing after changing the virtual network group according to claim 1, wherein before the session management function network element receives the subscription modification information sent by the unified data management function network element, the method comprises:
and the session management function network element subscribes subscription modification information of the unified data management function network element.
4. The method of claim 1, wherein after the session management function network element receives subscription modification information sent by the unified data management function network element, the method comprises:
responding to the user routing strategy supported by the user equipment, and sending the signing modification information to a strategy control function network element by the unified data management function network element;
and the strategy control function network element generates a user routing strategy and sends the user routing strategy to the user equipment.
5. The method of claim 4, wherein the user routing policy comprises a data network name of the second virtual network group and single network slice selection assistance information.
6. The method of claim 5, wherein in response to the UE receiving PDU session release control information with a cause value set to indicate a request to reestablish PDU sessions, the UE establishes a PDU session based on the PDU session name of the second VPN group and the single-network slice selection assistance information in the user routing policy.
7. The method of claim 1, wherein the UE interacts with an access and mobility management function network element to establish the second PDU session in response to the UE not supporting the user routing policy.
8. An apparatus for automatic reconstruction after changing a virtual network group, comprising:
the session management function network element is configured to receive subscription modification information sent by the unified data management function network element, wherein the subscription modification information indicates that the user equipment is changed from a first virtual network group to a second virtual network group;
a first generating module configured to generate, by a session management function network element, protocol data unit session release control information based on the subscription modification information, the protocol data unit session release control information including a cause value, the cause value being set to indicate a request to reestablish a protocol data unit session;
a first sending module, configured to send, by the session management function network element, the pdu session release control information to the ue to release a first pdu session based on the first virtual network group, the cause value set to indicate a request to reestablish a pdu session being provided for the ue to establish a second pdu session based on the second virtual network group.
9. A processing device for automatic reconstruction after changing virtual network group is characterized by comprising:
a processor;
a memory having stored therein executable instructions of the processor;
wherein the processor is configured to perform, via execution of the executable instructions:
the method of any of claims 1 to 7 for automatic reconfiguration after changing virtual network groups.
10. A computer-readable storage medium storing a program that when executed implements:
the method for automatic reconfiguration after changing virtual network groups according to any one of claims 1 to 7.
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