CN111278034A - Information backup method and device, storage medium and computer equipment - Google Patents

Abstract

In the technical solution of an information backup method, apparatus, storage medium and computer device provided in the embodiments of the present invention, after receiving a communication message sent by a UE, a local base station sends the communication message to a first network node of a remote core network and a second network node of the local core network, where the communication message carries an identity of the UE, and if the second network node determines that first user information of the UE corresponding to the identity is not stored, the second network node sends a request for obtaining the first user information of the UE to the first network node of the remote core network, and the first network node sends the first user information of the UE corresponding to the identity to the second network node, and the second network node stores the first user information of the UE, so that the second network node of the local core network can backup user information in the first network node of the remote core network in real time, when the backhaul link is interrupted, the accessed UE communication is not affected.

Description

An information backup method, device, storage medium and computer equipment

【Technical field】

The present invention relates to the technical field of mobile communication, in particular to an information backup method, device, storage medium and computer equipment.

【Background technique】

In the 3GPP standard, the reference interface between each network element is specified. For example, the S1/NG interface is used between the base station and the core network, which is divided into the control plane interface with the MME/AMF S1-MME/NG-C (N1) and S1-U/NG-U(N3) of user plane interface with SGW/UPF. The control plane interface S10/N4 between the MME/AMF and the MME/AMF, the control plane interface S6a/N8 between the MME/AMF and the user information storage center HSS/UDM, etc. After the UE successfully attaches to the network, the MME/AMF will store relevant information about the UE, including mobility information, some subscription information and security information, etc., to manage the normal use of network resources by the UE. When the UE reattaches to the network or performs a location update message, the UE can be quickly connected to the network and a session can be established when the information about the UE in the MME/AMF is valid. Otherwise, re-authentication, establishment of security context, etc. are required. Under normal circumstances, the base station uses the S1 interface to connect to the remote core network through a gateway or directly to establish a link for communication.

When the S1/NG backhaul link is disconnected, all devices under the coverage of this base station will not be able to communicate normally. In similar scenarios in mines, the S1/NG backhaul link is often interrupted. In the related art, the transfer of UE information between MME/AMF occurs when the UE is handed over. However, in the case of mines, due to the harsh environment, the backhaul link interruption occurs irregularly and cannot be predicted. Therefore, when the link is interrupted, the information of the UE in the remote core network cannot be transmitted to the local core network. However, when the local core network has no relevant data, it cannot provide communication services for the UE. Therefore, there is an urgent need for a technical solution that can ensure that UE communication is not affected when the backhaul link is interrupted or restored.

[Content of the Invention]

In view of this, the present invention provides an information backup method, device, storage medium and computer equipment, through which the user information in the first network node of the remote core network can be backed up in real time through the second network node of the local core network, so as to cope with the backhaul When the link is interrupted, the communication of the accessed UE is not affected.

On the one hand, an embodiment of the present invention provides an information backup method, including:

After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE;

If the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, the second network node sends a request for obtaining the first user information of the UE to the first network node of the remote core network;

The first network node sends the first user information of the UE corresponding to the identity identifier to the second network node;

The second network node stores the first user information of the UE.

Optionally, also include:

If the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, send a request for acquiring the second user information of the UE to the first network node at a set time interval;

The first network node sends the second user information of the UE to the second network node;

If the second network node determines that the data of the second user information is updated, the stored user information is updated according to the updated second user information.

Optionally, after the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, the method further includes:

If there is a line connection between the second network node of the local core network and the first network node of the remote core network, the second network node of the local core network monitors whether the link between the local network and the remote core network is interrupted ;

If the second network node of the local core network detects that the link between the local network and the remote core network has not been interrupted, continue to perform the sending to the first network node of the remote core network to obtain the first user information of the UE. requested steps.

Optionally, after the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, the method further includes:

If the communication between the second network node of the local core network and the first network node of the remote core network is forwarded by the local base station, the local base station monitors whether the link between the local network and the remote core network is interrupted;

If the local base station detects that the link between the local network and the remote core network is not interrupted, the step of sending a request for obtaining the first user information of the UE to the first network node of the remote core network is continued.

Optionally, also include:

If the second network node of the local core network detects that the link between the local network and the remote core network is interrupted, the second network node performs one or more of the following steps:

the second network node discards the communication message;

The second network node sends an indication message to the local base station, where the indication message includes a link interruption indication, an indication that the user information of the UE is not obtained, or an error indication.

Optionally, also include:

If the local base station detects that the link between the local network and the remote core network is interrupted, the local base station performs one or more of the following steps:

the local base station discards the communication message;

The local base station sends an indication message to the first network node, where the indication message includes a link interruption indication.

Optionally, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the information of the UE. Before identification, it also includes:

The UE sends the communication message of the UE to the remote core network through the local base station;

The remote core network authenticates the UE, and stores the user information of the UE obtained after authentication in the remote core network.

Optionally, the communication message includes an attach message or a location update message.

Optionally, the communication message of the UE carries the movement information of the UE;

The remote core network authenticates the UE, including:

The remote core network authenticates the identity identifier;

After the remote core network authenticates the UE, the method further includes:

If the authentication of the identity identifier is passed by the remote core network, sending the acquired mobility information, subscription information and security information of the UE to the first network node of the remote core network;

The first network node generates user information according to the mobility information, the subscription information, and the security information, and continues to execute, after the local base station receives the communication message sent by the UE, sends the communication message to the remote core The first network node of the network and the second network node of the local core network, the step of carrying the identity of the UE in the communication message.

Optionally, after the second network node determines that the second user information is updated with data, and updates the stored user information according to the update information, the method further includes:

If the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a communication message to the local base station;

The UE sends a communication message to the local base station, where the communication message carries a service trigger instruction;

The local base station sends the service triggering instruction to the second network node, so as to trigger the second network node to create a session for the UE to generate first session information and allocate the first GUTI to the UE;

The second network node sends the first session information and the first GUTI to the local base station;

The local base station updates the stored user information according to the first session information and the first GUTI.

Optionally, after the local base station updates the stored user information according to the first session information and the first GUTI, the method further includes:

If the local base station detects that the backhaul link is interrupted and recovered, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service request message to the local base station;

The UE sends a communication message to the local base station, where the communication message carries a service trigger instruction;

The local base station sends the service triggering instruction to the first network node, so as to trigger the first network node to create a session for the UE to generate second session information and allocate the second GUTI to the UE;

The first network node sends a request for acquiring user information of the UE to the second network node;

The second network node sends the user information to the first network node;

The first network node sends the second session information and the second GUTI to the local base station;

The local base station updates the stored user information according to the second session information and the second GUTI.

On the other hand, an embodiment of the present invention provides an information backup method, which is applied to a first network node of a remote core network, including:

After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE;

If the receiving second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, send a request for obtaining the first user information of the UE to the first network node of the remote core network;

The first user information of the UE corresponding to the identity identifier is sent to the second network node, so that the second network node stores the first user information of the UE.

Optionally, also include:

If the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, receiving a request sent by the second network node for obtaining the second user information of the UE at a set time interval;

The second user information of the UE is sent to the second network node, so that if the second network node determines that the second user information is updated with data, the stored user information is updated according to the update information.

Optionally, after the receiving local base station receives the communication message sent by the UE, the communication message sent to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the UE's information. Before identification, it also includes:

If the authentication of the identity identifier is passed by the remote core network, receiving the movement information, subscription information and security information of the UE sent by the remote core network;

Generate user information according to the mobile information, the subscription information and the security information, and continue to perform the receiving process. After the local base station receives the communication message sent by the UE, the communication message is sent to the first network node of the remote core network. and the second network node of the local core network, and the communication message carries the identity of the UE.

Optionally, in the sending of the second user information of the UE to the second network node, so that if the second network node determines that the second user information is updated with data, the stored data is updated according to the update information. After the user information is updated, it also includes:

When the local base station detects that the backhaul link is interrupted and recovered, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a communication message to the local base station, the After the communication message carries the service trigger instruction, receive the service trigger instruction sent by the local base station, and create a session for the UE according to the service trigger instruction to generate second session information and allocate the second GUTI to the UE;

sending a request for obtaining user information of the UE to the second network node;

receiving the user information sent by the second network node;

The second session information and the second GUTI are sent to the local base station, so that the local base station updates the stored user information according to the second session information and the second GUTI.

On the other hand, an embodiment of the present invention provides an information backup method, which is applied to a second network node of a local core network, including:

After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE;

If it is determined that the first user information of the UE corresponding to the identity identifier is not stored, sending a request for obtaining the first user information of the UE to the first network node of the remote core network;

receiving the first user information of the UE corresponding to the identity identifier sent by the first network node;

First user information of the UE is stored.

Optionally, also include:

If it is determined that the first user information of the UE corresponding to the identity identifier is stored, sending a request for acquiring the second user information of the UE to the first network node at a set time interval;

receiving the second user information of the UE sent by the first network node;

If it is determined that the data of the second user information is updated, the stored user information is updated according to the update information.

Optionally, after it is determined that the first user information of the UE corresponding to the identity identifier is not stored, the method further includes:

If there is a line connection between the second network node of the local core network and the first network node of the remote core network, monitor whether the link between the local network and the remote core network is interrupted;

If it is detected that the link between the local network and the remote core network is not interrupted, the step of continuing to perform the step of determining that the first user information of the UE corresponding to the identity identifier is not stored.

Optionally, after it is determined that the first user information of the UE corresponding to the identity identifier is not stored, the method further includes:

If it is detected that the link between the local network and the remote core network is interrupted, perform one or more of the following steps:

discarding the communication message;

Sending an indication message to the local base station, where the indication message includes a link interruption indication, an indication that the user information of the UE is not obtained, or an error indication.

Optionally, after updating the stored user information according to the update information if it is determined that the second user information has been updated, the method further includes:

When the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a communication message to the local base station, the After the service trigger instruction is carried in the communication message, the service trigger instruction sent by the local base station is received, first session information is generated according to the session creation for the UE, and the first GUTI is allocated to the UE.

The first session information and the first GUTI are sent to the local base station, so that the local base station updates the stored user information according to the first session information and the first GUTI.

On the other hand, an embodiment of the present invention provides an information backup device, which is applied to a first network node of a remote core network, and the device includes:

The first receiving module is configured to receive the communication message sent by the local base station to the first network node of the remote core network and the second network node of the local core network after the local base station receives the communication message sent by the UE, where the communication message carries the information of the UE. identification;

The first receiving module is further configured to receive, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, send to the first network node of the remote core network the information for obtaining the first user information of the UE. ask;

The first sending module is configured to send the first user information of the UE corresponding to the identity identifier to the second network node, so that the second network node stores the first user information of the UE.

Optionally, the device further includes:

The first receiving module is further configured to, if the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, receive a request sent by the second network node to obtain the second user information of the UE at a set time interval ;

The first sending module is further configured to send the second user information of the UE to the second network node, so that if the second network node determines that the second user information is updated with data, the stored data is updated according to the update information. User information is updated.

Optionally, the device further includes:

The first receiving module is further configured to receive the movement information, subscription information and security information of the UE sent by the remote core network if the authentication of the identity identifier is passed by the remote core network;

The first generating module is configured to generate user information according to the mobile information, the subscription information and the security information, and continue to perform the receiving after the local base station receives the communication message sent by the UE, and then send the communication message to the remote The first network node of the end core network and the second network node of the local core network, the step of carrying the identity of the UE in the communication message.

Optionally, the device further includes:

The first receiving module is further configured to, when the local base station detects that the backhaul link is interrupted and recovered, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a service trigger instruction to the local base station. The base station sends a communication message, and after the communication message carries the service trigger instruction, receives the service trigger instruction sent by the local base station;

The first generating module is further configured to generate second session information for the UE to create a session according to the service trigger instruction and allocate the second GUTI to the UE;

The first sending module is further configured to send a request for acquiring the user information of the UE to the second network node;

The first receiving module is further configured to receive the user information sent by the second network node;

The first sending module is further configured to send the second session information and the second GUTI to the local base station, so that the local base station updates the stored user information according to the second session information and the second GUTI.

On the other hand, an embodiment of the present invention provides an information backup device, which is applied to a second network node of a local core network, and the device includes:

The second receiving module is configured to receive the communication message sent by the local base station to the first network node of the remote core network and the second network node of the local core network after receiving the communication message sent by the UE, where the communication message carries the information of the UE. identification;

a second sending module, configured to send a request for obtaining the first user information of the UE to the first network node of the remote core network if it is determined that the first user information of the UE corresponding to the identity identifier is not stored;

The second receiving module is further configured to receive the first user information of the UE corresponding to the identifier sent by the first network node;

The second storage module is configured to store the first user information of the UE.

Optionally, the device further includes:

The second sending module is further configured to send a request for acquiring the second user information of the UE to the first network node at a set time interval if it is determined that the first user information of the UE corresponding to the identity identifier is stored;

The second receiving module is further configured to receive the second user information of the UE sent by the first network node;

The second update module is configured to update the stored user information according to the update information if it is determined that the second user information has data update.

Optionally, the device further includes:

The second monitoring module is configured to monitor whether the link between the local network and the remote core network is interrupted if there is a line connection between the second network node of the local core network and the first network node of the remote core network; If the link between the local network and the remote core network is not interrupted, the step of if it is determined that the first user information of the UE corresponding to the identity identifier is not stored is continued.

Optionally, the device further includes:

A second discarding module, configured to discard the communication message if the second network node of the local core network detects that the link between the local network and the remote core network is interrupted;

The second sending module is further configured to send an indication message to the local base station if the second network node of the local core network detects that the link between the local network and the remote core network is interrupted, where the indication message includes the link Interruption indication, UE's user information indication or error indication is not obtained.

Optionally, the device further includes:

The second receiving module is further configured to, when the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a service trigger to the local base station. The base station sends a communication message, and after the communication message carries the service triggering instruction, receives the service triggering instruction sent by the local base station;

The second generating module is configured to generate first session information according to the session creation for the UE and allocate the first GUTI to the UE.

The second sending module is further configured to send the first session information and the first GUTI to the local base station, so that the local base station updates the stored user information according to the first session information and the first GUTI .

On the other hand, an embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, wherein when the program runs, a device where the storage medium is located is controlled to execute the above-mentioned information backup method.

In another aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, where the memory is used for storing information including program instructions, the processor is used for controlling the execution of the program instructions, and the program instructions are processed The server loads and executes the steps of the above-mentioned information backup method.

In the technical solution provided by the embodiment of the present invention, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, and the communication message carries the identity of the UE, if the second network node determines that the first user information of the UE corresponding to the identity is not stored, it sends a request for obtaining the first user information of the UE to the first network node of the remote core network, The first network node sends the first user information of the UE corresponding to the identifier to the second network node, and the second network node stores the first user information of the UE, so that the second network node of the local core network can backup in real time User information in the first network node of the remote core network, so that when the backhaul link is interrupted, the communication of the accessed UE is not affected.

【Description of drawings】

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a flowchart of an information backup provided by an embodiment of the present invention;

2 is a flowchart of a kind of information backup provided by another embodiment of the present invention;

3 is a flowchart of a kind of information backup provided by another embodiment of the present invention;

4 is a schematic structural diagram of an information backup provided by an embodiment of the present invention;

5 is a schematic structural diagram of an information backup provided by another embodiment of the present invention;

FIG. 6 is a schematic diagram of a computer device according to an embodiment of the present invention.

【Detailed ways】

In order to better understand the technical solutions of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" used in this article is only an association relationship to describe related objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time. B, there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The following embodiments of the invention all take 4G base stations and core networks as examples, and are also applicable to 5G base stations and core networks, which are not limited in the present invention.

FIG. 1 is a flowchart of an information backup method provided by an embodiment of the present invention. As shown in FIG. 1 , the method includes:

Step 101: The UE sends the communication message of the UE to the remote core network through the local base station.

In this embodiment of the present invention, the communication message includes an attach message or a location update message.

This step may specifically include: the UE sends the communication message of the UE to the first network node of the remote core network through the local base station. The remote core network includes multiple network elements, for example, the multiple network elements of the remote core network may include MME, SGW, PGW, and HSS, wherein the first network node of the remote core network may include the remote end in the LTE network. If the mobility management function node (Mobility Management Entity, MME for short) of the core network is used, the UE can send the communication message of the UE to the MME of the remote core network through the local base station. In other embodiments, the first network node may also be a network node in other networks, for example, a network node in a 5G network, such as the access and mobility management function AMF of the core network, which is not limited in the present invention.

Step 102: The remote core network authenticates the UE, and stores the user information of the UE obtained after the authentication.

In the embodiment of the present invention, the communication message of the UE carries the identity identifier of the UE and the mobility information of the UE, so step 102 may specifically include: the remote core network authenticates the identity identifier. For example, the first network node in the remote core network identifies the identity identifier, and after the identification is passed, the user information storage center in the remote core network verifies the identity identifier, wherein the authentication of the identity identifier may specifically include user information storage The center detects whether the identity is the same as the pre-stored user identity. If it detects that the identity is the same as the pre-stored user identity, the two parties will verify through the negotiated key verification method. Indicates that the identity authentication between the network and the UE has passed. In other embodiments of the present invention, other authentication methods may also be used, and other network elements of the remote core network may also be used to authenticate the UE, which is not limited in the present invention. The user information storage center may include a home subscriber server (Home Subscriber Server, HSS).

After the remote core network authenticates the UE, the user information of the UE can be obtained, and the obtained user information of the UE can be stored, so that the stored user information can be sent to the second network node of the local core network in subsequent steps.

Step 103: If the authentication of the identity identifier by the remote core network is passed, the remote core network sends the acquired mobility information, subscription information and security information of the UE to the first network node of the remote core network.

In the embodiment of the present invention, after the remote core network authenticates the UE, the user information of the UE can be obtained. The user information of the UE includes mobile information, subscription information, security information, etc., and the user information may also include other information. Not limited. For example, the mobility information is the mobility information of the UE carried in the communication message when the UE sends the communication message of the UE to the remote core network through the local base station; the security information is the security information of the UE generated during the authentication process of the UE by the remote core network. information. Among them, the mobile information includes the location information of the UE; the subscription information includes the services available to the user, for example, the service includes the maximum speed, etc.; the security information includes the generation of the relevant keys after the mutual authentication between the UE and the remote core network, and the transmission of each segment, etc. . By sending the acquired user information to the first network node of the remote core network, the UE can use network resources normally. For example, when the UE reattaches the network or performs a location update message, the first network node stores information about the UE. When the user information is valid, the UE can quickly complete network access and establish a session; otherwise, re-authentication and establishment of a security context are required.

Step 104: The first network node generates user information according to the mobility information, subscription information and security information.

In this step, the generated user information includes mobile information, subscription information and security information.

Step 105: After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE.

Step 106: The second network node judges whether to store the first user information of the UE corresponding to the identity identifier, if yes, go to step 107; if not, go to step 122.

Step 107: The second network node sends a request for acquiring the second user information of the UE to the first network node at a set time interval.

In this embodiment of the present invention, the set time interval may be that a request for acquiring the second user information of the UE is sent to the first network node every 5s.

Step 108: The first network node sends the second user information of the UE to the second network node.

For example, if the scenario of the embodiment of the present invention is an LTE network, the first network node of the remote core network can send the second user information to the second network node of the local core network through the interface S10, so that the local network and the remote network can communicate with each other. After the link between the core networks is interrupted and restored, the UE can communicate normally through the UE's second user information pre-stored in the second network node and the method in the subsequent steps.

Step 109: If the second network node determines that the data of the second user information is updated, it updates the stored user information according to the update information.

In this embodiment of the present invention, the update information includes second user information after data update, wherein the second user information after data update includes all or part of the updated second user information.

In the embodiment of the present invention, after the stored user information is updated according to the second user information after the data update, so that the stored user information is valid user information, so as to facilitate the link between the local network and the remote core network. After the road is interrupted and restored, the UE can communicate normally through the UE's user information pre-stored in the second network node and the method in the subsequent steps.

In this embodiment of the present invention, after step 109, the method further includes: the second network node creates a session according to the second user information to generate session information.

In the embodiment of the present invention, the second network node creates a session according to the user information to generate session information, and can quickly restore the communication link for the UE when the backhaul link is interrupted.

Step 110: If the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, and the trigger message is used to instruct the UE to send a service trigger instruction to the local base station.

Step 111: The UE sends a communication message to the local base station, where the communication message carries a service triggering instruction.

Step 112: The local base station sends a service trigger instruction to the second network node, so as to trigger the second network node to create a session for the UE to generate first session information and allocate the first GUTI to the UE.

In the embodiment of the present invention, the terminal globally unique temporary identifier (Globally Unique Temporary UEIdentity, GUTI for short) is the unique UE identifier in the network, which can reduce the exposure of user private parameters such as IMSI and IMEI in network transmission. The GUTI is allocated by the remote core network or the local core network, and the GUTI can be sent to by communication messages such as attach messages.

Step 113: The second network node sends the first session information and the first GUTI to the local base station.

Step 114: The local base station updates the stored user information according to the first session information and the first GUTI.

Specifically, the local base station updates the session information in the user information according to the first session information, and updates the GUTI in the user information according to the first GUTI. For example, the session information in the user information generated after step 109 is updated according to the first session information in step 114 .

In this embodiment of the present invention, step 114 is used to make the user information in the local base station and the user information of the second network node in the local core network the same, so that the backhaul between the local network and the remote core network is achieved. After the link is interrupted, the UE can communicate normally through the local core network.

Step 115 , if the local base station detects that the backhaul link is interrupted and recovered, the local base station sends a trigger message to the UE, and the trigger message is used to instruct the UE to send a service trigger instruction to the local base station.

Step 116: The UE sends a communication message to the local base station, where the communication message carries a service triggering instruction.

Step 117: The local base station sends a service triggering instruction to the first network node, so as to trigger the first network node to create a session for the UE to generate second session information and allocate the second GUTI to the UE.

Step 118: The first network node sends a request for acquiring user information of the UE to the second network node.

In this embodiment of the present invention, the request for acquiring the user information of the UE may include an identification request (IdentificationRequest) message or a context request (Context Request) message. In this embodiment of the present invention, the acquired user information of the UE may be user information of a single UE, or may be user information of multiple UEs, which is not limited in the present invention.

Step 119: The second network node sends user information to the first network node.

Step 120: The first network node sends the second session information and the second GUTI to the local base station.

Step 121: The local base station updates the stored user information according to the second session information and the second GUTI.

Specifically, the local base station updates the session information in the user information according to the second session information, and updates the GUTI in the user information according to the second GUTI.

In this embodiment of the present invention, step 121 is used to make the user information in the local base station and the user information of the second network node in the local core network the same, so that the backhaul between the local network and the remote core network is achieved. After the link is interrupted and recovered, the UE can realize normal communication through the remote core network.

Step 122: If there is a line connection between the second network node of the local core network and the first network node of the remote core network, the second network node of the local core network monitors whether the link between the local network and the remote core network occurs. If it is interrupted, if yes, go to step 123; if not, go to step 124.

In this embodiment of the present invention, the local network includes a local base station and/or a local core network. If the local base station monitors that the link between the local network and the remote core network is not interrupted, the local base station forwards the message that the link between the local network and the remote core network is not interrupted to the remote core network, so that the remote core network can The first network node of the UE sends the acquired user information of the UE to the second network node of the local core network.

Step 123: The second network node discards the communication message, and the process ends.

In this embodiment of the present invention, as an optional solution, step 123 may further include: the second network node sends an indication message to the local base station, where the indication message includes a link interruption indication, an indication of user information of the UE that is not obtained, or an error indication. As another optional solution, step 123 may further include: the second network node does not process the communication message.

In this embodiment of the present invention, the second network node may also perform one or more steps in the foregoing solution, or other steps in addition to this, which is not limited in the present invention.

In this embodiment of the present invention, as an optional solution, step 122 may also be step 122', and the specific steps to be executed are the communication methods between the second network node of the local core network and the first network node of the remote core network It is determined that if there is a line connection between the second network node of the local core network and the first network node of the remote core network, perform step 122; if the second network node of the local core network and the first network node of the remote core network The communication is carried out through the forwarding of the local base station, and step 122' is executed, and the step 122' specifically includes:

Step 122', if the communication between the second network node of the local core network and the first network node of the remote core network is forwarded by the local base station, the local base station monitors whether the link between the local network and the remote core network is interrupted, If yes, go to step 123 ′; if no, go to step 124 .

In the embodiment of the present invention, if the local base station monitors that the link between the local network and the remote core network is not interrupted, the local base station forwards the message that the link between the local network and the remote core network is not interrupted to the remote core network, So that the first network node of the remote core network sends the acquired user information of the UE to the second network node of the local core network.

Step 123', the local base station discards the communication message, and the process ends.

In this embodiment of the present invention, as an optional solution, step 123' may further include: the local base station sends an indication message to the first network node, where the indication message includes a link interruption indication. As another optional solution, step 123' may further include: the local base station does not process the communication message.

In this embodiment of the present invention, the local base station may also perform one or more steps in the foregoing solution, or other steps in addition to this, which is not limited in the present invention.

Step 124: The second network node sends a request for acquiring the first user information of the UE to the first network node of the remote core network.

Step 125: The first network node sends the first user information of the UE corresponding to the identity identifier to the second network node.

In the embodiment of the present invention, in the LTE network, the first network node of the remote core network may send the acquired user information of the UE to the second network node of the local core network through the interface S10. When the link between the local network and the remote core network is not interrupted, the user information of the UE is sent to the second network node of the local core network, so that the link between the local network and the remote core network is interrupted and restored Then, the UE can communicate normally through the user information of the UE pre-stored in the second network node and the method in the subsequent steps.

Step 126: The second network node stores the first user information of the UE.

In this embodiment of the present invention, the second network node stores the user information, so that after the link between the local network and the remote core network is interrupted and restored, the user information of the UE pre-stored in the second network node and subsequent The method in the steps enables the UE to communicate normally.

In the technical solution provided by the embodiment of the present invention, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, and the communication message carries the UE's The identity identifier, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, it sends a request to obtain the first user information of the UE to the first network node of the remote core network, and the first network node sends the first user information to the first network node of the remote core network. The second network node sends the first user information of the UE corresponding to the identity, and the second network node stores the first user information of the UE, so that the second network node of the local core network can back up the user information in the first network node of the remote core network in real time , so that when the backhaul link is interrupted, the communication of the accessed UE is not affected.

FIG. 2 is a flowchart of an information backup method provided by an embodiment of the present invention. The method is applied to a first network node of a remote core network. As shown in FIG. 2 , the method includes:

Step 201: After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE.

Step 202: If the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, send a request for obtaining the first user information of the UE to the first network node of the remote core network.

Step 203: Send the first user information of the UE corresponding to the identity identifier to the second network node, so that the second network node stores the first user information of the UE.

In the embodiment of the present invention, further, it also includes:

Step 203a: If the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, the request for obtaining the second user information of the UE sent by the second network node is received at preset time intervals.

Step 203b: Send the second user information of the UE to the second network node, so that if the second network node determines that data update of the second user information occurs, the stored user information is updated according to the update information.

In this embodiment of the present invention, further, after step 203b, the method further includes:

When the local base station detects that the backhaul link is interrupted and recovered, the local base station sends a trigger message to the UE, and the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a communication message to the local base station. After the service trigger instruction, receive the service trigger instruction sent by the local base station, and create a session for the UE according to the service trigger instruction to generate second session information and allocate the second GUTI to the UE;

sending a request for obtaining user information of the UE to the second network node;

receiving user information sent by the second network node;

The second session information and the second GUTI are sent to the local base station, so that the local base station updates the stored user information according to the second session information and the second GUTI.

In this embodiment of the present invention, further, before step 201, the method further includes:

If the remote core network passes the identity authentication, receiving the UE's mobility information, subscription information and security information sent by the remote core network;

Generate user information according to the mobile information, subscription information and security information, and proceed to step 201 .

In the technical solution provided by the embodiment of the present invention, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, and the communication message carries the UE's The identity identifier, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, it sends a request to obtain the first user information of the UE to the first network node of the remote core network, and the first network node sends the first user information to the first network node of the remote core network. The second network node sends the first user information of the UE corresponding to the identity, and the second network node stores the first user information of the UE, so that the second network node of the local core network can back up the user information in the first network node of the remote core network in real time , so that when the backhaul link is interrupted, the communication of the accessed UE is not affected.

FIG. 3 is a flowchart of an information backup method provided by an embodiment of the present invention. The method is applied to a second network node of a local core network. As shown in FIG. 3 , the method includes:

Step 301: After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE.

Step 302: If it is determined that the first user information of the UE corresponding to the identity identifier is not stored, send a request for obtaining the first user information of the UE to the first network node of the remote core network.

Step 303: Receive the first user information of the UE corresponding to the identity identifier sent by the first network node.

Step 304: Store the first user information of the UE.

In the embodiment of the present invention, further, it also includes:

Step 304a: If it is determined that the first user information of the UE corresponding to the identity identifier is stored, send a request for acquiring the second user information of the UE to the first network node at a set time interval.

Step 304b: Receive the second user information of the UE sent by the first network node.

Step 304c: If it is determined that the data of the second user information is updated, update the stored user information according to the update information.

In this embodiment of the present invention, after step 304c, the method further includes:

When the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, and the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a communication message to the local base station. After the service triggering instruction is received, the service triggering instruction sent by the local base station is received, first session information is generated according to the session created for the UE, and the first GUTI is allocated to the UE.

The first session information and the first GUTI are sent to the local base station, so that the local base station updates the stored user information according to the first session information and the first GUTI.

In the embodiment of the present invention, further, after determining that the first user information of the UE corresponding to the identity identifier is not stored in step 302, the method further includes:

If there is a line connection between the second network node of the local core network and the first network node of the remote core network, monitor whether the link between the local network and the remote core network is interrupted;

If it is detected that the link between the local network and the remote core network is not interrupted, the process of sending a request for obtaining the first user information of the UE to the first network node of the remote core network in step 302 continues.

In the embodiment of the present invention, further, after determining that the first user information of the UE corresponding to the identity identifier is not stored in step 302, the method further includes:

If it is detected that the link between the local network and the remote core network is interrupted, perform one or more of the following steps:

discard communication messages;

An indication message is sent to the local base station, where the indication message includes a link interruption indication, an indication that the user information of the UE has not been acquired, or an error indication.

In the technical solution provided by the embodiment of the present invention, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, and the communication message carries the UE's The identity identifier, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, it sends a request to obtain the first user information of the UE to the first network node of the remote core network, and the first network node sends the first user information to the first network node of the remote core network. The second network node sends the first user information of the UE corresponding to the identity, and the second network node stores the first user information of the UE, so that the second network node of the local core network can back up the user information in the first network node of the remote core network in real time , so that when the backhaul link is interrupted, the communication of the accessed UE is not affected.

FIG. 4 is a schematic structural diagram of an information backup device provided by an embodiment of the present invention. The device is applied to a first network node of a remote core network. As shown in FIG. 4 , the device includes: a first receiving module 11 and a The first sending module 12 .

The first receiving module 11 is configured to receive the communication message sent by the local base station to the first network node of the remote core network and the second network node of the local core network after the local base station receives the communication message sent by the UE, where the communication message carries the information of the UE. identification;

The first receiving module 11 is further configured to receive, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, send to the first network node of the remote core network to obtain the first user information of the UE. request;

The first sending module 12 is configured to send the first user information of the UE corresponding to the identity identifier to the second network node, so that the second network node stores the first user information of the UE.

In this embodiment of the present invention, the device includes:

The first receiving module 11 is further configured to, if the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, receive the information sent by the second network node to obtain the second user information of the UE at a set time interval. ask.

The first sending module 12 is further configured to send the second user information of the UE to the second network node, so that if the second network node determines that the second user information is updated with data, it stores the data according to the update information. user information is updated.

In this embodiment of the present invention, the apparatus includes: a first generating module 13

The first receiving module 11 is further configured to receive the movement information, subscription information and security information of the UE sent by the remote core network if the identity identifier is authenticated by the remote core network.

The first generating module 13 is configured to generate user information according to the mobile information, the subscription information and the security information.

In this embodiment of the present invention, the device includes:

The first receiving module 11 is further configured to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted and recovered, and the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a service trigger instruction to the local base station. The local base station sends a communication message, and after the communication message carries the service trigger instruction, receives the service trigger instruction sent by the local base station;

The first generating module is further configured to generate second session information for the UE to create a session according to the service trigger instruction and allocate the second GUTI to the UE.

The first sending module 12 is further configured to send a request for acquiring user information of the UE to the second network node.

The first receiving module 11 is further configured to receive the user information sent by the second network node.

The first sending module 12 is further configured to send the second session information and the second GUTI to the local base station, so that the local base station updates the stored user information according to the second session information and the second GUTI.

In the technical solution provided by the embodiment of the present invention, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, and the communication message carries the identity of the UE, if the second network node determines that the first user information of the UE corresponding to the identity is not stored, it sends a request for obtaining the first user information of the UE to the first network node of the remote core network, The first network node sends the first user information of the UE corresponding to the identifier to the second network node, and the second network node stores the first user information of the UE, so that the second network node of the local core network can backup in real time User information in the first network node of the remote core network, so that when the backhaul link is interrupted, the communication of the accessed UE is not affected.

FIG. 5 is a schematic structural diagram of an information backup device provided by another embodiment of the present invention. The device is applied to a second network node of a local core network. As shown in FIG. 5 , the device includes: a second receiving module 21, The second sending module 22 and the second storage module 23 .

The second receiving module 21 is configured to receive the communication message sent by the local base station to the first network node of the remote core network and the second network node of the local core network after the local base station receives the communication message sent by the UE, where the communication message carries the information of the UE. identification;

The second sending module 22 is configured to send a request for acquiring the first user information of the UE to the first network node of the remote core network if it is determined that the first user information of the UE corresponding to the identity identifier is not stored;

The second receiving module 21 is further configured to receive the first user information of the UE corresponding to the identity identifier sent by the first network node;

The second storage module 23 is configured to store the first user information of the UE.

In this embodiment of the present invention, the apparatus includes: a second update module 24 .

The second sending module 22 is further configured to send a request for acquiring the second user information of the UE to the first network node at a set time interval if it is determined that the first user information of the UE corresponding to the identity identifier is stored.

The second receiving module 21 is further configured to receive the second user information of the UE sent by the first network node;

The second update module 24 is configured to update the stored user information according to the update information if it is determined that the second user information is updated with data.

In this embodiment of the present invention, the device includes: a second monitoring module 25 .

The second monitoring module 25 is configured to monitor whether the link between the local network and the remote core network is interrupted if there is a line connection with the first network node of the remote core network; If the link is not interrupted, the step of sending the request for obtaining the first user information of the UE to the first network node of the remote core network described in the second sending module 22 continues to be performed.

In this embodiment of the present invention, the apparatus includes: a second discarding module 26 .

The second discarding module 26 is configured to discard the communication message if the second network node of the local core network detects that the link between the local network and the remote core network is interrupted.

The second sending module 22 is further configured to send an indication message to the local base station if the second network node of the local core network detects that the link between the local network and the remote core network is interrupted, where the indication message includes the link A road interruption indication, a UE user information indication or an error indication is not obtained.

In this embodiment of the present invention, the apparatus includes: a second generation module 27

The second receiving module 21 is further configured to, when the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station, so that the UE sends a service trigger instruction to the local base station. The local base station sends a communication message, and after the communication message carries the service triggering instruction, receives the service triggering instruction sent by the local base station;

The second generating module 27 is configured to generate first session information according to the session creation for the UE and allocate the first GUTI to the UE.

The second sending module 22 is further configured to send the first session information and the first GUTI to the local base station, so that the local base station performs the stored user information according to the first session information and the first GUTI. renew.

In the technical solution provided by the embodiment of the present invention, after receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, and the communication message carries the identity of the UE, if the second network node determines that the first user information of the UE corresponding to the identity is not stored, it sends a request for obtaining the first user information of the UE to the first network node of the remote core network, The first network node sends the first user information of the UE corresponding to the identifier to the second network node, and the second network node stores the first user information of the UE, so that the second network node of the local core network can backup in real time User information in the first network node of the remote core network, so that when the backhaul link is interrupted, the communication of the accessed UE is not affected.

An embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, wherein, when the program is running, the device where the storage medium is located is controlled to execute the steps of the above-mentioned information backup method. For details, please refer to the above-mentioned information backup method. Example.

An embodiment of the present invention provides a computer device, including a memory and a processor, where the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and the above-mentioned information backup method is implemented when the program instructions are loaded and executed by the processor A step of. For a specific description, refer to the foregoing embodiments of the information backup method.

FIG. 6 is a schematic diagram of a computer device according to an embodiment of the present invention. As shown in FIG. 6 , the computer device 4 of this embodiment includes: a processor 41 , a memory 42 , and a computer program 43 stored in the storage 42 and executable on the processor 41 , when the computer program 43 is executed by the processor 41 In order to avoid repetition, the method for implementing the information backup application in the embodiment will not be repeated here. Alternatively, when the computer program is executed by the processor 41, the functions of each model/unit in the locating device for root cause alarm in the embodiment are implemented. To avoid repetition, details are not repeated here.

The computer device 4 includes, but is not limited to, a processor 41 and a memory 42 . Those skilled in the art can understand that FIG. 6 is only an example of the computer device 4, and does not constitute a limitation on the computer device 4, and may include more or less components than the one shown, or combine some components, or different components For example, the computer device 4 may also include an input and output device, a network access device, a bus, and the like.

The so-called processor 41 may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 42 may be an internal storage unit of the computer device 4 , such as a hard disk or a memory of the computer device 4 . The memory 42 can also be an external storage device of the computer device 4, such as a plug-in hard disk equipped on the computer device 4, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash memory card (FlashCard). )Wait. Further, the memory 42 may also include both an internal storage unit of the computer device 4 and an external storage device. The memory 42 is used to store computer programs and other programs and data required by the computer device 4 . The memory 42 may also be used to temporarily store data that has been or will be output.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other divisions. For example, multiple units or components may be combined or may be Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (Processor) to execute the methods described in the various embodiments of the present invention. some steps. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (10)

1. an information backup method, is characterized in that, comprises: After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE; If the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, the second network node sends a request for obtaining the first user information of the UE to the first network node of the remote core network; The first network node sends the first user information of the UE corresponding to the identity identifier to the second network node; The second network node stores the first user information of the UE. 2. The method of claim 1, further comprising: If the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, send a request for acquiring the second user information of the UE to the first network node at a set time interval; The first network node sends the second user information of the UE to the second network node; If the second network node determines that data update of the second user information occurs, the stored user information is updated according to the update information. 3. The method according to claim 2, wherein, if the second network node determines that the second user information is updated with data, and then updates the stored user information according to the update information, further comprising: : If the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station; The UE sends a communication message to the local base station, where the communication message carries the service triggering instruction; The local base station sends the service triggering instruction to the second network node, so as to trigger the second network node to create a session for the UE to generate first session information and allocate the first GUTI to the UE; The second network node sends the first session information and the first GUTI to the local base station; The local base station updates the stored user information according to the first session information and the first GUTI. 4. The method according to claim 3, wherein after the local base station updates the stored user information according to the first session information and the first GUTI, the method further comprises: If the local base station detects that the backhaul link is interrupted and recovered, the local base station sends a trigger message to the UE, where the trigger message is used to instruct the UE to send a service trigger instruction to the local base station; The UE sends a communication message to the local base station, where the communication message carries a service trigger instruction; The local base station sends the service triggering instruction to the first network node, so as to trigger the first network node to create a session for the UE to generate second session information and allocate the second GUTI to the UE; The first network node sends a request for acquiring user information of the UE to the second network node; The second network node sends the user information to the first network node; The first network node sends the second session information and the second GUTI to the local base station; The local base station updates the stored user information according to the second session information and the second GUTI. 5. An information backup method, characterized in that, applied to the first network node of the remote core network, comprising: After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE; receiving, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, sending a request for obtaining the first user information of the UE to the first network node of the remote core network; The first user information of the UE corresponding to the identity identifier is sent to the second network node, so that the second network node stores the first user information of the UE. 6. An information backup method, characterized in that, applied to the second network node of the local core network, comprising: After receiving the communication message sent by the UE, the local base station sends the communication message to the first network node of the remote core network and the second network node of the local core network, where the communication message carries the identity of the UE; If it is determined that the first user information of the UE corresponding to the identity identifier is not stored, sending a request for obtaining the first user information of the UE to the first network node of the remote core network; receiving the first user information of the UE corresponding to the identity identifier sent by the first network node; First user information of the UE is stored. 7. An information backup device, characterized in that it is applied to a first network node of a remote core network, the device comprising: The first receiving module is configured to receive the communication message sent by the local base station to the first network node of the remote core network and the second network node of the local core network after the local base station receives the communication message sent by the UE, where the communication message carries the information of the UE. identification; The first receiving module is further configured to receive, if the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored, send to the first network node of the remote core network a message for obtaining the first user information of the UE. ask; The first sending module is configured to send the first user information of the UE corresponding to the identity identifier to the second network node, so that the second network node stores the first user information of the UE. 8. An information backup device, characterized in that it is applied to a second network node of a local core network, the device comprising: The second receiving module is configured to receive the communication message sent by the local base station to the first network node of the remote core network and the second network node of the local core network after receiving the communication message sent by the UE, where the communication message carries the information of the UE. identification; a second sending module, configured to send a request for acquiring the first user information of the UE to the first network node of the remote core network if it is determined that the first user information of the UE corresponding to the identity identifier is not stored; The second receiving module is further configured to receive the first user information of the UE corresponding to the identifier sent by the first network node; The second storage module is configured to store the first user information of the UE. 9. A storage medium, characterized in that the storage medium comprises a stored program, wherein when the program runs, a device where the storage medium is located is controlled to perform the information backup according to any one of claims 1 to 4 method. 10. A computer device comprising a memory and a processor, the memory for storing information including program instructions, the processor for controlling the execution of the program instructions, wherein the program instructions are loaded and executed by the processor When implementing the steps of the information backup method described in any one of claims 1 to 4.

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