CN117440447A - Session migration method and device, electronic equipment and storage medium - Google Patents

Abstract

The application discloses a session migration method, a session migration device, electronic equipment and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: in case of failure of the first session management function SMF, the emergency SMF sends a first request to a first user plane function UPF, where the first request is used to obtain first information of a first user, and the first information includes user identification information and network service information; according to the first information, establishing a corresponding relation between the first UPF and the first user; under the condition that the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, wherein the second request is used for acquiring target session information related to the first user, and the second user comprises a user for opening a long term evolution voice bearing VoLTE service; and according to the target session information, the emergency SMF responds to the target session request.

Description

Session migration method and device, electronic equipment and storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to a session migration method, a session migration device, electronic equipment and a storage medium.

Background

Control Plane/User Plane (C/U) separation is implemented under a fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) network. The session management function (Session Management Function, SMF) of the control plane and the user plane function (User Plane Function, UPF) of the user plane communicate messages via CU split (Control and User Plane Separation of EPC nodes, cpu) protocol of the EPC node of the N4 interface.

When the SMF is down due to faults, the SMF releases all the carried services, the SMF informs an authentication management function (Authentication Management Function, AMF) and informs a terminal of a deregistration flow, the terminal reports registration and service requests again after the data service is off line, the network side rapidly informs the service to be off line, and the data service is reselected after being on line again, so that the fault SMF is avoided, and the service perception is not obvious; but for a Voice over Long-Term Evolution (VoLTE) service in a conversation state, when the SMF notifies to delete the conversation, a dropped call phenomenon is directly caused, so that a customer perception is obvious, and user experience is affected.

Disclosure of Invention

The embodiment of the application provides a session migration method, a session migration device, electronic equipment and a storage medium, which can realize session migration under the condition of SMF fault and ensure that service perception of a user who is carrying out VoLTE service is not influenced.

In a first aspect, an embodiment of the present application provides a session migration method, including: in case of failure of a first session management function, SMF, the emergency SMF sends a first request to a first user plane function, UPF, wherein the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used for obtaining first information of a first user, the first user includes at least one of a plurality of user terminals, UEs, corresponding to a plurality of services carried by the first SMF, the first information includes user identification information and network service information; establishing a corresponding relation between the first UPF and the first user according to the first information; if the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, where the second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service; and according to the target session information, the emergency SMF responds to the target session request.

In a second aspect, an embodiment of the present application provides a session migration method, which is executed by a network storage function NRF, including: receiving a fault report message sent by a first Session Management Function (SMF), wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information borne by the first SMF; and enabling an emergency SMF when the first cause indicates that the first SMF has a temporary failure, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a second request to a voice session to the first user when the network service information indicates that the first user is a second user and a target session request of the first user is received, the plurality of services corresponding to the plurality of services carried by the first SMF is included, the plurality of UEs corresponding to the first user terminals UE is determined according to the service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user, and the first user is further configured to obtain a target session request for the first voice session.

In a third aspect, embodiments of the present application provide a session migration method performed by a user plane function UPF, the UPF including at least one of a plurality of UPFs associated with a first SMF, the first SMF being at least one of a plurality of SMFs that fail, including: and sending a first response message and/or a second response message to the emergency SMF, wherein the first response message carries first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, the first information comprises user identification information and network service information, the network service information is used for indicating whether the first user opens a long term evolution voice bearing (VoLTE) service, the second response message carries target session information related to the first user, and the target session information is used for the emergency SMF to respond to a target session request of the first user.

In a fourth aspect, an embodiment of the present application provides a session migration apparatus, including: a first request module, configured to send, in the event of a failure of a first session management function SMF, a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UEs corresponding to a plurality of services carried by the first SMF, and the first information includes user identification information and network service information; the establishing module is used for establishing the corresponding relation between the first UPF and the first user according to the first information; a second request module, configured to, when the network service information indicates that the first user is a second user and receives a target session request of the first user, send a second request to a second UPF by using the emergency SMF, where the second UPF includes at least one of a plurality of first UPFs that have a corresponding relationship with the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user that opens a long term evolution voice bearer VoLTE service; and the response module is used for responding to the target session request by the emergency SMF according to the target session information.

In a fifth aspect, an embodiment of the present application provides a session migration apparatus, which is applied to a network storage function NRF, including: the receiving module is used for receiving a fault report message sent by a first Session Management Function (SMF), wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information borne by the first SMF; a control module, configured to enable an emergency SMF when the first cause indicates that a temporary failure occurs in the first SMF, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relation between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a session request to the first user in a case where the network service information indicates that the first user is a second user and a target session is received by the first user, the first user includes at least one of a plurality of voice sessions corresponding to the first user, the first user corresponds to the target session request is further configured to obtain the second session request, the first request includes at least one of the first user in a plurality of voice sessions corresponding to the target session, and the first user corresponds to the target session request is further configured to the first user in a voice session.

In a sixth aspect, embodiments of the present application provide a session migration apparatus applied to a user plane function UPF, the UPF including at least one of a plurality of UPFs associated with a first SMF, the first SMF being at least one of a plurality of SMFs that fail, including: the emergency SMF is used for sending a first response message and/or a second response message to the emergency SMF, wherein the first response message carries first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, the first information comprises user identification information and network service information, the network service information is used for indicating whether the first user opens a voice over long term evolution (VoLTE) service, the second response message carries target session information related to the first user, and the target session information is used for the emergency SMF to respond to a target session request of the first user.

In a seventh aspect, an embodiment of the present application provides an electronic device, where the electronic device includes a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, where the program or the instruction implements the steps of the session migration method according to the first aspect or the second aspect or the third aspect when executed by the processor.

In an eighth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement the steps of the session migration method according to the first aspect or the second aspect or the third aspect.

In a ninth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement a session migration method according to the first aspect, the second aspect, or the third aspect.

In the embodiment of the application, in the case that a first session management function SMF fails, sending a first request to a first user plane function UPF by the emergency SMF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, and the first information includes user identification information and network service information; establishing a corresponding relation between the first UPF and the first user according to the first information; if the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, where the second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service; according to the target session information, the emergency SMF responds to the target session request, can realize session migration under the condition of SMF fault, and simultaneously ensures that service perception of a user who is carrying out VoLTE service is not affected.

Drawings

Fig. 1 is a schematic flow chart of a session migration method provided in an embodiment of the present application;

FIG. 2 is a flow chart of another method for session migration according to an embodiment of the present disclosure;

fig. 3 is a flow chart of another session migration method according to an embodiment of the present application;

fig. 4 is a flow chart of yet another session migration method provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a session migration apparatus according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another session migration apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of still another session migration apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The following describes in detail a session migration method, a session migration device, an electronic device, and a storage medium provided in the embodiments of the present application through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

C/U separation and C/D separation are realized under the 5G network, and UPF supports various conversations and services in a service continuity (Session and Service Continuity, SSC) mode, so that different service application scenes such as large bandwidth, low time delay, large connection and the like are ensured. But for 5G network faults, the fault scene of the user plane network element UPF is mainly analyzed, for example, a plurality of UPF load sharing sets are adopted to provide hot or cold standby service; aiming at the link failure between the UPF and the 5GC of the park, a kite scheme is also proposed to carry out temporary risk avoidance; however, aiming at the fault scene of the control plane network SMF, the current common practice is to drop the service carried by the fault network element into the line at the time, so that the service is forced to interrupt in time and re-initiate the request, and the fault network element is avoided. For common data service, short service interruption data service perception is not obvious, and only depends on the off-line speed of the network side kick-off service, but for VoLTE service, interruption of voice service is brought, and no matter how fast the off-line speed is, the service perception of a client is influenced. For this scenario, a solution is needed to ensure that customers that are doing VoLTE traffic are not impacted when SMF fails.

Fig. 1 illustrates a session migration method provided in an embodiment of the present application, which may be performed by an electronic device. In other words, the method may be performed by software or hardware installed in the electronic device, the method comprising the steps of:

s101: in case of a failure of the first session management function SMF, the emergency SMF sends a first request to the first user plane function UPF.

The first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, and the first information includes user identification information and network service information.

The present embodiment seeks an emergency SMF to replace a failed SMF through a 5GC network NRF, and notifies the emergency SMF back through a UPF to synchronize session data.

Specifically, in this embodiment, an emergency disaster recovery mechanism of n+1 may be established by dividing an SMF POOL in a 5GC network, where N represents an SMF number of normal operation, 1 represents an emergency SMF with the same hardware resource configuration and soft parameter configuration as other SMFs in the POOL, but without network configuration data (such as soft parameter data including interface IP and NF capability), and in a normal scenario, the status of the emergency SMF is unavailable. When a normal operation SMF has a fault scene, the NRF informs the emergency SMF to perform configuration copying according to network setting data of the fault SMF, the emergency SMF inherits NF instantiation data of the fault SMF, the fault SMF is set to be unavailable, the emergency SMF state is set to be suspended, and only a user request for an established session is sent to the emergency SMF for processing.

Meanwhile, through the n4_basic_getrequest/n4_basic_getrespon flow between the N4 interfaces, the emergency SMF actively synchronizes session data to the UPF docked by the failed SMF, and obtains session data of the current user, including: basic data such as the IMSI/GUTI of the user, 5QI bearing information of the current line, and the like.

S102: and establishing a corresponding relation between the first UPF and the first user according to the first information.

The emergency SMF can record the corresponding relation between the current service user and the corresponding UPF, so as to facilitate the subsequent acquisition of the session information of the current service user.

S103: in the case where the network traffic information indicates that the first user is a second user and a target session request for the first user is received, the emergency SMF sends a second request to a second UPF.

The second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used for obtaining target session information related to the first user, and the second user includes a user opening a long term evolution voice bearer VoLTE service.

S104: and according to the target session information, the emergency SMF responds to the target session request.

The emergency SMF first performs a VoLTE user judgment according to basic data acquired from the UPF, that is: currently, a session of 5 QI=1 or 1&2 is not established, namely a non-VoLTE user; a session of 5 qi=1 or 1&2 is established, i.e. VoLTE users.

For VoLTE users, the terminal initiates various signaling flows, such as: after the PDU session initiated by the UE is modified, after the AMF receives the message, the AMF sends Nsmf_PDUSion_UpdateSMContext to the emergency SMF to update the session context of the terminal, the N4_SESSIONDATA_GETREQUESUEST/N4_BASICTDATA_GETRESPONSE process among N4 interfaces, and according to the corresponding relation between the user and the UPF acquired by the emergency SMF in the previous steps, the emergency SMF is informed to acquire session data on the UPF, N4 session context and other information, so as to complete session-level data connection, the emergency SMF synchronizes the session data on the UPF, N4 session context and other information, the emergency SMF responds to the PDU session update request of the terminal according to the existing process, replies the signaling process of the Nsmf_PDUSion_ UpdateSMContext Response connection terminal, and normally processes the signaling process initiated by the terminal, thereby realizing session reconstruction of the N4 interfaces and ensuring uninterrupted LTE (Voice service).

According to the session migration method provided by the embodiment of the application, the emergency SMF is used for screening and identifying the VoLTE user, and for the session information of the VoLTE user, the UPF is used for synchronizing session data to the emergency SMF, so that the normal connection of the service of the VoLTE user is ensured, and the service perception is not damaged.

According to the session migration method provided by the embodiment of the application, under the condition that a first Session Management Function (SMF) fails, an emergency SMF sends a first request to a first User Plane Function (UPF), wherein the first UPF comprises at least one of a plurality of UPFs related to the first SMF, the first request is used for acquiring first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, and the first information comprises user identification information and network service information; establishing a corresponding relation between the first UPF and the first user according to the first information; if the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, where the second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service; according to the target session information, the emergency SMF responds to the target session request, can realize session migration under the condition of SMF fault, and simultaneously ensures that service perception of a user who is carrying out VOLTE service is not affected.

In one implementation, after the step S101, the method further includes:

and configuring the network of the emergency SMF according to the network configuration data of the first SMF, wherein the network configuration data is sent by a network storage function NRF.

Specifically, the NRF notifies the emergency SMF of the IP address of the failed SMF, capability of supporting slice information, and the like, and the emergency SMF copies its own network data according to the information, so as to ensure that signaling sent to the failed SMF later will be carried by the emergency SMF.

In one implementation, after the step S104, the method further includes:

the emergency SMF sends a first message to an Authentication Management Function (AMF), wherein the first message is used for notifying the AMF to release session resources related to the first user.

After the VoLTE session is finished, the UPF informs the emergency SMF of updating 5QI data, the emergency SMF informs the AMF of deregistering a user until the number of users on the emergency SMF is 0, and informs the NRF of modifying the state of the emergency SMF, so that the state of the emergency SMF is changed into unavailable, and any signaling is not processed any more.

In one implementation, after the step S101, the method further includes:

And under the condition that the network service information indicates that the first user is a third user, the emergency SMF sends a second message to an Authentication Management Function (AMF), wherein the second message is used for notifying the AMF to release session resources related to the first user, and the third user comprises a user who does not open VoLTE service.

For the terminal without VoLTE service, the terminal is informed to be offline according to the existing flow, and the terminal is re-registered in the network, so that the load on the emergency SMF can be reduced.

As can be seen from the description of the above embodiments, in order to implement session migration in the case of an SMF failure, and ensure that the service awareness of a user who is performing VoLTE service is not affected, communication and collaboration between various network elements in the network are required, for example, when a normal operation SMF has a failure scene, the NRF notifies the emergency SMF to perform configuration copy according to network configuration data of the failed SMF, the emergency SMF inherits NF instantiation data of the failed SMF, the failed SMF is set to be unavailable, the emergency SMF state is set to be suspended, and a user request for an established session is sent to the emergency SMF to be processed.

Thus, another embodiment of the present application provides a session migration method, performed by a network storage function NRF, as shown in fig. 2, the method comprising the steps of:

S201: and receiving a fault report message sent by the first session management function SMF.

The fault report message includes a first reason indicating that the first SMF has a fault and service information carried by the first SMF.

For example, the failure SMF actively or manually reports the SMF failure to the NRF, performs the service deregistration procedure of the SMF on the NRF, and reports the cause value and the traffic of the bearer, such as: the reach code=111 represents an SMF temporary fault.

S202: and enabling an emergency SMF in the condition that the first reason indicates that the first SMF has temporary faults.

The emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a correspondence between the first UPF and the first user according to the first information, and if the network service information indicates that the first user is a second user and a target session request of the first user is received, send a second request to a second UPF, where the second UPF includes a plurality of UPFs corresponding to the first user and the first user, the second UPF includes at least one of voice session request corresponding to the first user, and the target session request is further configured to open the target session request.

For example, the NRF makes a fault SMF state modification, establishes an emergency SMF, and modifies the emergency SMF state: after the NRF receives the request of the deregistration cause value readon code=111 reported by the SMF, the state of the failed SMF is changed to unavailable, the state of the emergency SMF is changed to suspended, and the emergency SMF executes the steps of the session migration method in the foregoing embodiment, which is not described herein.

In one implementation, after the step S202, the method further includes:

and sending a third message to the emergency SMF, wherein the third message carries network configuration data of the first SMF, and the network configuration data is used for configuring a network of the emergency SMF.

For example, the NRF notifies the emergency SMF of capability information such as an IP address of the failed SMF and supporting slice information, and the emergency SMF copies its own network data according to the failed SMF, and signaling to the failed SMF is carried by the emergency SMF.

The session migration method is executed by a network storage function NRF and is carried out by receiving a fault report message sent by a first session management function SMF, wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information borne by the first SMF; and enabling an emergency SMF when the first cause indicates that the first SMF has a temporary failure, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a second request to a voice session to the first user when the network service information indicates that the first user is a second user and a target session request of the first user is received, where the second user is not in a voice session is being performed, the second request is not being performed by the first user, and the voice session is not being requested to be performed by the second user.

Yet another embodiment of the present application provides a session migration method performed by a user plane function UPF, the UPF including at least one of a plurality of UPFs associated with a first SMF, the first SMF being at least one of a plurality of SMFs that fail, as shown in fig. 3, the method comprising the steps of:

s301: and sending the first response message and/or the second response message to the emergency SMF.

The first response message carries first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, the first information comprises user identification information and network service information, the network service information is used for indicating whether the first user opens a voice over long term evolution (VoLTE) service, the second response message carries target session information related to the first user, and the target session information is used for responding to a target session request of the first user by the emergency SMF.

The UPF interacts with the SMF through an N4 interface, the SMF directly controls and manages the UPF, and performs service flow processing according to various strategies issued by the SMF, the emergency SMF sends a first request to the first UPF, wherein the first UPF comprises at least one of a plurality of UPFs related to the first SMF, the first request is used for acquiring first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, the first information comprises user identification information and network service information, the first UPF sends a first response message to the emergency SMF, and the first response message carries the first information; the emergency SMF sends to a second UPF, wherein the second UPF comprises at least one of a plurality of first UPFs with corresponding relation with the first user, the second request is used for acquiring target session information related to the first user, the second user comprises a user opening a long term evolution voice bearer VoLTE service, the second UPF sends a second response message to the emergency SMF, and the second response message carries the target session information.

The session migration method provided by the embodiment of the present application is executed by a user plane function UPF, where the UPF includes at least one of a plurality of UPFs associated with a first SMF, the first SMF is at least one of a plurality of failed SMFs, and by sending a first response message and/or a second response message to an emergency SMF, the first response message carries first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the first information includes user identification information and network service information, the network service information is used to indicate whether the first user opens a long term evolution voice-carried VoLTE service, the second response message carries target session information related to the first user, and the target session information is used for the emergency SMF to respond to a target session request of the first user, so that session perception can be achieved under the condition that the SMF fails, and at the same time, the service of the user performing the lte service is not affected by the service.

Fig. 4 is a schematic flowchart of a session migration method provided in an embodiment of the present application, as shown in fig. 4, where the method includes the following steps:

S401: notifying the NRF of the SMF failure.

And sending a fault report message to the NRF by the first SMF, wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information carried by the first SMF.

S402: the NRF performs fault SMF state modification and establishes an emergency SMF.

That is, when the first cause indicates that the first SMF has a temporary failure, an emergency SMF is enabled, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a second request to the first user and a voice session request to the first user if the network service information indicates that the first user is a second user and a target session request of the first user is received, the plurality of services corresponding to the plurality of services carried by the first SMF is included, the plurality of UEs corresponding to the plurality of services carried by the first SMF are determined according to the service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user.

S403: and acquiring basic data, and judging by the VoLTE user.

In case of failure of the first session management function SMF, the emergency SMF sends a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, and the first information includes user identification information and network service information.

S404: informing the non-VoLTE user terminal to register.

That is, after the emergency SMF sends a first request to a first user plane function UPF, in a case that the network service information indicates that the first user is a third user, the emergency SMF sends a second message to an authentication management function AMF, where the second message is used to notify the AMF to release session resources related to the first user, and the third user includes a user who does not open a VoLTE service.

S405: the VoLTE user reports the PDU modification session request.

In this step, the VoLTE ue transparently transmits the PDU session modification request through the 5G base station.

S406: request to update session data.

After the AMF receives the request, the AMF sends Nsmf_PDUSion_UpdateSMContext to the emergency SMF to update the session context of the terminal.

S407: session data is acquired.

That is, in the case that the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, where the second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service.

In this step, the n4_session_getrequest/n4_basic_getrequest flow between the interfaces in the step N4, according to the corresponding relationship between the user and the UPF obtained by the emergency SMF, the SMF notifies the UPF to obtain the session data on the UPF, the N4 session context, and other information, so as to complete the session-level data connection.

S408: responsive to the session update.

The emergency SMF responds to the PDU session updating request of the terminal according to the existing flow, replies Nsmf_PDUSion_ UpdateSMContext Response, and guarantees the uninterrupted VoLTE service.

According to the session migration method provided by the embodiment of the application, the 5GC network NRF is used for searching for the emergency SMF to replace the fault SMF, the emergency SMF is reversely informed to synchronize session data through the UPF, and for the terminal without VoLTE service, the terminal is informed to be offline according to the existing flow and re-registered in the network, so that the burden on the new SMF is reduced; and for the terminal with VoLTE service, recovering the VoLTE session, realizing session migration, and ensuring that the service perception of the user who is carrying out VoLTE service is not influenced.

It should be noted that, in the session migration method provided in the embodiment of the present application, the execution body may be a session migration device, or a control module in the session migration device for executing the session migration method. In the embodiment of the present application, a session migration device executes a session migration method by using a session migration device as an example, and the session migration device provided in the embodiment of the present application is described.

Fig. 5 is a schematic structural diagram of a session migration apparatus according to an embodiment of the present application. As shown in fig. 5, the session migration apparatus 500 includes: a first request module 510, configured to send, in the event of a failure of a first session management function SMF, a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request being for obtaining first information of a first user, the first user including at least one of a plurality of user terminals UEs corresponding to a plurality of services carried by the first SMF, the first information including user identification information and network service information; the establishing module 520 is configured to establish a correspondence between the first UPF and the first user according to the first information; a second request module 530, configured to, if the network service information indicates that the first user is a second user and receives a target session request of the first user, send a second request to a second UPF by the emergency SMF, where the second UPF includes at least one of a plurality of first UPFs having a corresponding relationship with the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service; and a response module 540, configured to respond to the target session request by the emergency SMF according to the target session information.

In the session migration device provided by the embodiment of the present application, through a first request module, in case of a failure of a first session management function SMF, an emergency SMF sends a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, and the first information includes user identification information and network service information; the establishing module is used for establishing the corresponding relation between the first UPF and the first user according to the first information; a second request module, configured to, when the network service information indicates that the first user is a second user and receives a target session request of the first user, send a second request to a second UPF by using the emergency SMF, where the second UPF includes at least one of a plurality of first UPFs that have a corresponding relationship with the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user that opens a long term evolution voice bearer VoLTE service; and the response module is used for responding to the target session request according to the target session information, realizing session migration under the condition of SMF fault, and simultaneously ensuring that the service perception of the user who is carrying out VoLTE service is not influenced.

In one implementation, the first request module 510 is further configured to: and configuring the network of the emergency SMF according to the network configuration data of the first SMF, wherein the network configuration data is sent by a network storage function NRF.

In one implementation, the response module 540 is further configured to: the emergency SMF sends a first message to an Authentication Management Function (AMF), wherein the first message is used for notifying the AMF to release session resources related to the first user.

In one implementation, the first request module 510 is further configured to: and under the condition that the network service information indicates that the first user is a third user, the emergency SMF sends a second message to an Authentication Management Function (AMF), wherein the second message is used for notifying the AMF to release session resources related to the first user, and the third user comprises a user who does not open VoLTE service.

Fig. 6 is a schematic structural diagram of another session migration apparatus according to an embodiment of the present application. As shown in fig. 6, the session migration apparatus 600, applied to the network storage function NRF, includes: a receiving module 610, configured to receive a failure report message sent by a first session management function SMF, where the failure report message includes a first cause indicating that the first SMF fails and service information carried by the first SMF; a control module 620, configured to enable an emergency SMF when the first cause indicates that the first SMF has a temporary failure, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relation between the first UPF and the first user according to the first information, the emergency SMF is further configured to obtain a first session with a second user when the network service information indicates that the first user is a second user and the first user receives a target session with the first user, the plurality of services carried by the first SMF is configured to send a second session with the first user, the plurality of UEs corresponding to the first user terminal UE corresponds to the first user terminal UE, the first request is further configured to obtain the second session with the first request, and the emergency SMF includes at least one of the first user plane function UPF corresponds to the first user plane function UPF, and the first request is configured to establish a corresponding relation between the first user session with the first user.

In one implementation, the control module 620 is further configured to:

and sending a third message to the emergency SMF, wherein the third message carries network configuration data of the first SMF, and the network configuration data is used for configuring a network of the emergency SMF.

Fig. 7 is a schematic structural diagram of still another session migration apparatus according to an embodiment of the present application. As shown in fig. 7, a session migration apparatus 700 for application to a user plane function, UPF, the UPF comprising at least one of a plurality of UPFs associated with a first SMF, the first SMF being at least one of a plurality of SMFs that are malfunctioning, the apparatus comprising: a sending module 710, configured to send a first response message and/or a second response message to an emergency SMF, where the first response message carries first information of a first user, where the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the first information includes user identification information and network service information, the network service information is used to indicate whether the first user opens a long term evolution voice-carried VoLTE service, and the second response message carries target session information related to the first user, where the target session information is used for the emergency SMF to respond to a target session request of the first user.

The session migration device in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a cell phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, wearable device, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device may be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (TV), teller machine or self-service machine, etc., and the embodiments of the present application are not limited in particular.

The session migration device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.

The session migration device provided in the embodiment of the present application can implement each process implemented in the embodiments of the methods of fig. 1 to 4, and in order to avoid repetition, a description is omitted here.

Optionally, as shown in fig. 8, the embodiment of the present application further provides an electronic device 800, including a processor 801, a memory 802, and a program or an instruction stored in the memory 802 and executable on the processor 801, where the program or the instruction is implemented when executed by the processor 801: in case of failure of a first session management function, SMF, the emergency SMF sends a first request to a first user plane function, UPF, wherein the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used for obtaining first information of a first user, the first user includes at least one of a plurality of user terminals, UEs, corresponding to a plurality of services carried by the first SMF, the first information includes user identification information and network service information; establishing a corresponding relation between the first UPF and the first user according to the first information; if the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, where the second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service; according to the target session information, the emergency SMF responds to the target session request; or receiving a fault report message sent by a first Session Management Function (SMF), wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information borne by the first SMF; enabling an emergency SMF when the first cause indicates that the first SMF has a temporary failure, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a second request to a voice session to the first user if the network service information indicates that the first user is a second user and a target session request of the first user is received, the plurality of services corresponding to the plurality of services carried by the first SMF is determined according to the service information carried by the first SMF, the first information includes a second request to the first user, and the emergency SMF is further configured to open a voice session to the first request; or sending a first response message and/or a second response message to the emergency SMF, where the first response message carries first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the first information includes user identification information and network service information, the network service information is used to indicate whether the first user opens a long term evolution voice-carried VoLTE service, and the second response message carries target session information related to the first user, where the target session information is used for the emergency SMF to respond to a target session request of the first user.

In one implementation, the above-described programs or instructions, when executed by the processor 801, implement: and configuring the network of the emergency SMF according to the network configuration data of the first SMF, wherein the network configuration data is sent by a network storage function NRF.

In one implementation, the above-described programs or instructions, when executed by the processor 801, implement: the emergency SMF sends a first message to an Authentication Management Function (AMF), wherein the first message is used for notifying the AMF to release session resources related to the first user.

In one implementation, the above-described programs or instructions, when executed by the processor 801, implement: and under the condition that the network service information indicates that the first user is a third user, the emergency SMF sends a second message to an Authentication Management Function (AMF), wherein the second message is used for notifying the AMF to release session resources related to the first user, and the third user comprises a user who does not open VoLTE service.

In one implementation, the above-described programs or instructions, when executed by the processor 801, implement: and sending a third message to the emergency SMF, wherein the third message carries network configuration data of the first SMF, and the network configuration data is used for configuring a network of the emergency SMF.

The specific execution steps can refer to the steps of the session migration method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and the description is omitted here.

It should be noted that, the electronic device in the embodiment of the present application includes: a server, a terminal device, or other devices in addition to a terminal device.

The above electronic device structure does not constitute a limitation of the electronic device, and the electronic device may include more or less components than illustrated, or may combine some components, or may be different in arrangement of components, for example, an input unit, may include a graphics processor (Graphics Processing Unit, GPU) and a microphone, and a display unit may configure a display panel in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit includes at least one of a touch panel and other input devices. Touch panels are also known as touch screens. Other input devices may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

The memory may be used to store software programs as well as various data. The memory may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory may include volatile memory or nonvolatile memory, or the memory may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM).

The processor may include one or more processing units; optionally, the processor integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the processes of the embodiment of the session migration method are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is configured to run a program or an instruction, implement each process of the above session migration method embodiment, and achieve the same technical effect, so as to avoid repetition, and not be repeated here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), including several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims (10)

1. A method of session migration, the method comprising:

in case of failure of a first session management function, SMF, the emergency SMF sends a first request to a first user plane function, UPF, wherein the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used for obtaining first information of a first user, the first user includes at least one of a plurality of user terminals, UEs, corresponding to a plurality of services carried by the first SMF, the first information includes user identification information and network service information;

establishing a corresponding relation between the first UPF and the first user according to the first information;

if the network service information indicates that the first user is a second user and a target session request of the first user is received, the emergency SMF sends a second request to a second UPF, where the second UPF includes at least one of a plurality of first UPFs corresponding to the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user who opens a long term evolution voice bearer VoLTE service;

And according to the target session information, the emergency SMF responds to the target session request.

2. The method of claim 1, wherein after the emergency SMF sends the first request to the first user plane function UPF, the method further comprises:

and configuring the network of the emergency SMF according to the network configuration data of the first SMF, wherein the network configuration data is sent by a network storage function NRF.

3. The method of claim 1, wherein after the emergency SMF responds to the target session request, the method further comprises:

the emergency SMF sends a first message to an Authentication Management Function (AMF), wherein the first message is used for notifying the AMF to release session resources related to the first user.

4. The method of claim 1, wherein after the emergency SMF sends the first request to the first user plane function UPF, the method further comprises:

and under the condition that the network service information indicates that the first user is a third user, the emergency SMF sends a second message to an Authentication Management Function (AMF), wherein the second message is used for notifying the AMF to release session resources related to the first user, and the third user comprises a user who does not open VoLTE service.

5. A session migration method, characterized by being executed by a network storage function NRF, the method comprising:

receiving a fault report message sent by a first Session Management Function (SMF), wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information borne by the first SMF;

and enabling an emergency SMF when the first cause indicates that the first SMF has a temporary failure, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a second request to a voice session to the first user when the network service information indicates that the first user is a second user and a target session request of the first user is received, the plurality of services corresponding to the plurality of services carried by the first SMF is included, the plurality of UEs corresponding to the first user terminals UE is determined according to the service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relationship between the first UPF and the first user, and the first user is further configured to obtain a target session request for the first voice session.

6. The method of claim 5, wherein after the enabling of the emergency SMF, the method further comprises:

and sending a third message to the emergency SMF, wherein the third message carries network configuration data of the first SMF, and the network configuration data is used for configuring a network of the emergency SMF.

7. A session migration method performed by a user plane function, UPF, the UPF comprising at least one of a plurality of UPFs associated with a first SMF, the first SMF being at least one of a plurality of SMFs that are malfunctioning, the method comprising:

and sending a first response message and/or a second response message to the emergency SMF, wherein the first response message carries first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, the first information comprises user identification information and network service information, the network service information is used for indicating whether the first user opens a long term evolution voice bearing (VoLTE) service, the second response message carries target session information related to the first user, and the target session information is used for the emergency SMF to respond to a target session request of the first user.

8. A session migration apparatus, the apparatus comprising:

a first request module, configured to send, in the event of a failure of a first session management function SMF, a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is used to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UEs corresponding to a plurality of services carried by the first SMF, and the first information includes user identification information and network service information;

the establishing module is used for establishing the corresponding relation between the first UPF and the first user according to the first information;

a second request module, configured to, when the network service information indicates that the first user is a second user and receives a target session request of the first user, send a second request to a second UPF by using the emergency SMF, where the second UPF includes at least one of a plurality of first UPFs that have a corresponding relationship with the first user, the second request is used to obtain target session information related to the first user, and the second user includes a user that opens a long term evolution voice bearer VoLTE service;

And the response module is used for responding to the target session request by the emergency SMF according to the target session information.

9. A session migration apparatus, characterized by being applied to a network storage function NRF, the apparatus comprising:

the receiving module is used for receiving a fault report message sent by a first Session Management Function (SMF), wherein the fault report message comprises a first reason for indicating that the first SMF breaks down and service information borne by the first SMF;

a control module, configured to enable an emergency SMF when the first cause indicates that a temporary failure occurs in the first SMF, where the emergency SMF is configured to send a first request to a first user plane function UPF, where the first UPF includes at least one of a plurality of UPFs associated with the first SMF, the first request is configured to obtain first information of a first user, the first user includes at least one of a plurality of user terminals UE corresponding to a plurality of services carried by the first SMF, the plurality of UEs corresponding to a plurality of services carried by the first SMF are determined according to service information carried by the first SMF, the first information includes user identification information and network service information, the emergency SMF is further configured to establish a corresponding relation between the first UPF and the first user according to the first information, the emergency SMF is further configured to send a session request to the first user in a case where the network service information indicates that the first user is a second user and a target session is received by the first user, the first user includes at least one of a plurality of voice sessions corresponding to the first user, the first user corresponds to the target session request is further configured to obtain the second session request, the first request includes at least one of the first user in a plurality of voice sessions corresponding to the target session, and the first user corresponds to the target session request is further configured to the first user in a voice session.

10. A session migration apparatus for application to a user plane function, UPF, the UPF comprising at least one of a plurality of UPFs associated with a first SMF, the first SMF being at least one of a plurality of SMFs that are malfunctioning, the apparatus comprising:

the emergency SMF is used for sending a first response message and/or a second response message to the emergency SMF, wherein the first response message carries first information of a first user, the first user comprises at least one of a plurality of user terminals (UE) corresponding to a plurality of services borne by the first SMF, the first information comprises user identification information and network service information, the network service information is used for indicating whether the first user opens a voice over long term evolution (VoLTE) service, the second response message carries target session information related to the first user, and the target session information is used for the emergency SMF to respond to a target session request of the first user.