WO2021146913A1 - Information backup method and apparatus, storage medium and computer device - Google Patents

Abstract

Provided are an information backup method and apparatus, a storage medium and a computer device. In the technical solution, the method comprises: after receiving a communication message sent by a UE, a local base station sending the communication message to a first network node of a remote core network and a second network node of a local core network, wherein the communication message carries an identity identifier of the UE; if the second network node determines that first user information of the UE corresponding to the identity identifier is not stored, sending, to the first network node of the remote core network, a request for acquiring the first user information of the UE; the first network node sending, to the second network node, the first user information of the UE corresponding to the identity identifier; and the second network node storing the first user information of the UE. Therefore, 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 as to prevent affecting communication of a UE, that has gained access, when a backhaul link is interrupted.

Description

Method, device, storage medium and computer equipment for backing up information Technical field

The present invention relates to the field of mobile communication technology, in particular to a method, device, storage medium and computer equipment for backing up information.

Background technique

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

When the S1/NG backhaul link is disconnected, all devices covered by this base station will not be able to communicate normally. In similar scenarios in mines, the S1/NG backhaul link disconnection often occurs. In related technologies, the UE information transfer between MME/AMF occurs when the UE is handed over. However, in this situation in the mine, due to the harsh environment, the backhaul link interruption occurs from time to time and cannot be predicted. Therefore, when the link is interrupted, the UE information in the remote core network cannot be transmitted to the local core network. However, if 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 solve the interruption or recovery of the backhaul link and ensure that the UE communication is not affected.

Summary of the invention

In view of this, the present invention provides an information backup method, device, storage medium, and computer equipment. The second network node of the local core network can back up user information in the first network node of the remote core network in real time to deal with backhaul. When the link is interrupted, the communication of the connected 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, 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 identity to the second network node;

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

Optionally, it also includes:

If the second network node determines that the first user information of the UE corresponding to the identity is stored, it sends a request for obtaining 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 second user information has been 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 is not interrupted, continue to execute the sending of the first network node of the remote core network to obtain the first user information of the UE The 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 second network node of the local core network and the first network node of the remote core network communicate through the local base station forwarding, 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, continue to perform the step of sending a request to the first network node of the remote core network to obtain the first user information of the UE.

Optionally, it also includes:

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:

Discarding the communication message by the second network node;

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, it also includes:

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 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 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 the authentication in the remote core network.

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

Optionally, the UE's mobile information is carried in the UE's communication message;

The authentication of the UE by the remote core network includes:

The remote core network authenticates the identity;

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

If the remote core network passes the authentication of the identity, sending the acquired UE's mobility information, subscription information, and security information 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 that after the local base station receives the communication message sent by the UE, it 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 communication message carries the step of the identity of the UE.

Optionally, after the second network node determines that the second user information has been updated in data, updating 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 trigger instruction to the second network node 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 a 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 resumed, 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 trigger instruction to the first network node to trigger the first network node to create a session for the UE to generate second session information and allocate a second GUTI to the UE;

The first network node sends a request for obtaining 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, and includes:

Receiving the communication message sent 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 by the local base station, the communication message carrying the identity of the UE;

If the receiving second network node determines that the first user information of the UE corresponding to the identity 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;

Sending the first user information of the UE corresponding to the identity to the second network node, so that the second network node stores the first user information of the UE.

Optionally, it also includes:

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

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 has been updated, the stored user information is updated according to the update information.

Optionally, after the receiving communication message sent by the UE is received by the local base station, 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 communication message of the UE. Before identification, it also includes:

If the remote core network passes the authentication of the identity, receiving the UE's movement information, subscription information, and security information 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, and then sends the communication message to the first network node of the remote core network With the second network node of the local core network, the communication message carries the step of the identity of the UE.

Optionally, 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 has been updated, it will update the stored information according to the updated information. After the user information is updated, it also includes:

When the local base station detects that the backhaul link is interrupted and resumed, the local base station sends a trigger message to the UE. 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 communication message carries the service triggering instruction, receiving the service triggering instruction sent by the local base station, and creating a session for the UE according to the service triggering instruction to generate second session information and allocating a 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, and includes:

Receiving the communication message sent 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 by the local base station, the communication message carrying 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, send 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;

Storing the first user information of the UE.

Optionally, it also includes:

If it is determined that the first user information of the UE corresponding to the identity identifier is stored, sending a request for obtaining 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 second user information has been 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, continue to perform the step of determining that the first user information of the UE corresponding to the identity 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:

Discard the communication message;

Send 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 it is determined that the data update of the second user information occurs, updating the stored user information according to the update information, 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. 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 communication message carries the service trigger instruction, the service trigger instruction sent by the local base station is received, and the first session information is generated according to the creation of the session for the UE and the first GUTI is allocated to the UE.

The first session information and the first GUTI are sent to a 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 a communication message sent 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, and the communication message carries the communication message of the UE. Identification

The first receiving module is also configured to receive a request for acquiring the first user information of the UE to the first network node of the remote core network when the second network node determines that the first user information of the UE corresponding to the identity identifier is not stored. ask;

The first sending module is configured to send the first user information of the UE corresponding to the identity 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 is stored, receive a request for obtaining the second user information of the UE sent by the second network node at a set time interval ；

The first sending module is also configured to send second user information of the UE to the second network node, so that if the second network node determines that the second user information has been updated, it will update the stored information according to the updated information. User information is updated.

Optionally, the device further includes:

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

The first generation module is configured to generate user information according to the movement information, the subscription information, and the security information, and continue to execute the receiving of the communication message sent by the UE by the local base station, 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 communication message carries the step of the identity of the UE.

Optionally, the device further includes:

The first receiving module is also configured to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted and resumed. The trigger message is used to instruct the UE to send a service trigger instruction to the local base station so that the UE can send a service trigger instruction to the local base station. The base station sends a communication message, and after the communication message carries a 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 to allocate a second GUTI to the UE;

The first sending module is further configured to send a request for obtaining 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 a communication message sent 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, and the communication message carries the information of the UE. Identification

The second sending module is 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 first user information of the UE corresponding to the identity identifier sent by the first network node;

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

Optionally, the device further includes:

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

The second receiving module is further configured to receive 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 been updated.

Optionally, the device further includes:

The second monitoring module is used 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 it is detected The link between the local network and the remote core network is not interrupted, and 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, the device further includes:

The second discarding module 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 is further configured to send an indication message to the local base station when 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 indication message including the link An interruption indication, an indication that the user information of the UE is not obtained, or an error indication.

Optionally, the device further includes:

The second receiving module is also used to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted. The trigger message is used to instruct the UE to send a service trigger instruction to the local base station so that the UE can send 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 second generating module is configured to generate the first session information and allocate the first GUTI to the UE according to the creation of the session for the UE.

The second sending module is further configured to send the first session information and the first GUTI to a 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 that includes a stored program, wherein, when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned information backup method.

On the other hand, an embodiment of the present invention provides a computer device including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and the program instructions are processed. The device 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 to the first network node of the remote core network to obtain the first user information of the UE, 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 back up in real time The user information in the first network node of the remote core network is used to cope with the interruption of the backhaul link, and the communication of the connected UE is not affected.

Description of the drawings

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

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

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

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

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

Fig. 6 is a schematic diagram of a computer device provided by an embodiment of the present invention.

Detailed ways

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

It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work 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. The singular forms of "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

It should be understood that the term "and/or" used in this article is only an association relationship describing related objects, which means that there can be three kinds of relationships. For example, A and/or B can mean that there is A alone, and there are A and A at the same time. B, there are three cases of B alone. In addition, the character "/" in this text generally indicates that the associated objects before and after are in 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 the 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, where the first network node of the remote core network may include the remote end of the LTE network. If the mobility management function node (Mobility Management Entity, MME for short) of the core network, 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 authentication.

In the embodiment of the present invention, the communication message of the UE carries the identity of the UE and the movement information of the UE. Therefore, step 102 may specifically include: the remote core network authenticates the identity. For example, the first network node in the remote core network recognizes the identity, and after the recognition is passed, the user information storage center in the remote core network authenticates the identity, where the authentication of the identity may specifically include user information storage The center detects whether the identity is the same as the pre-stored user identity. If it is detected that the identity is the same as the pre-stored user identity, then the two parties will verify through the negotiated key verification method. After the two parties pass the verification, then 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. Among them, the user information storage center may include a home subscriber server (Home Subscriber Server, HSS).

After the remote core network authenticates the UE, it can obtain the user information of the UE and store the obtained user information of the UE, 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 remote core network passes the authentication of the identity identifier, the remote core network sends the acquired UE movement information, subscription information, and security information 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 UE's mobility information carried in the communication message when the UE sends the UE's communication message to the remote core network through the local base station; the security information is the UE's security 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 that the user can use, for example, the service includes the maximum rate, etc.; the security information includes the mutual authentication of the UE and the remote core network, the generation of related keys 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 to 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 security context establishment are required.

Step 104: The first network node generates user information according to the movement information, the subscription information, and the 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. The communication message carries the identity of the UE.

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

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

In the embodiment of the present invention, the set time interval may be a request to obtain the second user information of the UE to the first network node every 5 s.

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 After the link between the core networks is interrupted and restored, the UE's second user information pre-stored in the second network node and the method in the subsequent steps are used to enable the UE to communicate normally.

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

In the embodiment of the present invention, the update information includes the second user information after the data is updated, where the second user information after the data update includes the completely updated second user information or the partially 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, the stored user information is made valid user information, so as to facilitate the link between the local network and the remote core network. After the path is interrupted and restored, the UE's user information pre-stored in the second network node and the method in the subsequent steps are used to enable the UE to communicate normally.

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

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

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, and the communication message carries a service trigger instruction.

Step 112: The local base station sends a service trigger instruction to the second network node 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 Globally Unique Temporary UE Identity (GUTI) is the unique UE identity in the network, which can reduce the exposure of user private parameters such as IMSI and IMEI in network transmission. GUTI is allocated by the remote core network or the local core network, and can be sent to the GUTI through 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 the embodiment of the present invention, through step 114, the user information in the local base station is the same as the user information of the second network node in the local core network, so that the backhaul between the local network and the remote core network After the link is interrupted, the UE can realize normal communication through the local core network.

Step 115: If the local base station detects that the backhaul link is interrupted and resumed, the local base station sends a trigger message to the UE. 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, and the communication message carries a service trigger instruction.

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

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

In the embodiment of the present invention, the request for obtaining user information of the UE may include an identification request (Identification Request) message or a context request (Context Request) message. In the embodiment of the present invention, the acquired user information of the UE may be the user information of a single UE or the 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 the embodiment of the present invention, through step 121, the user information in the local base station is the same as the user information of the second network node in the local core network, so that the backhaul between the local network and the remote core network After the link interruption is restored, 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 Interrupt, if yes, go to step 123; if not, continue to step 124.

In the 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 has not been interrupted to the remote core network, so that the remote core network The first network node of 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 the 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. The indication message includes a link interruption indication, an indication that the user information of the UE is not obtained, or an error indication. As another optional solution, step 123 may also include: the second network node does not process the communication message.

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

In the embodiment of the present invention, as an optional solution, step 122 may also be step 122', and the specific steps are performed by the communication mode 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 is connected to the first network node of the remote core network To communicate with each other through local base station forwarding, step 122' is executed, and step 122' specifically includes:

Step 122', if the second network node of the local core network and the first network node of the remote core network communicate through the local base station forwarding, the local base station monitors whether the link between the local network and the remote core network is interrupted, If yes, perform step 123'; if not, continue to perform 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 has not been 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 the 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, and the indication message includes a link interruption indication. As another optional solution, step 123' may also include: the local base station does not process the communication message.

In the embodiment of the present invention, the local base station may also execute one or more steps in the above solution, or other steps besides this, which is not limited in the present invention.

Step 124: The second network node sends a request for acquiring 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. Through the link between the local network and the remote core network without interruption, 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 After that, 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 the embodiment of the present invention, the second network node stores 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 step 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. The communication message carries the information 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 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 of the UE to the first network node. 2. The 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 , In order to deal with the interruption of the backhaul link, the communication of the connected UE will not be 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 by the local base station, the communication message sent to the first network node of the remote core network and the second network node of the local core network is received, and the communication message carries the identity of the UE.

Step 202: When receiving, 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 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 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, it further includes:

Step 203a: If the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, it receives a request for acquiring the second user information of the UE sent by the second network node at a set time interval.

Step 203b: 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 has been updated, the stored user information is updated according to the update information.

In the 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 resumed, the local base station sends a trigger message to the UE. 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 communication message carries 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 the embodiment of the present invention, further, before step 201, the method further includes:

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

Generate user information according to mobile information, subscription information, and security information, and continue to perform 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. The communication message carries the information 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 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 of the UE to the first network node. 2. The 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 , In order to deal with the interruption of the backhaul link, the communication of the connected UE is not affected.

Fig. 3 is a flow chart 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 by the local base station, the communication message sent to the first network node of the remote core network and the second network node of the local core network is received, and 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, a request for obtaining the first user information of the UE is sent 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, it further includes:

Step 304a: If it is determined that the first user information of the UE corresponding to the identity is stored, a request for obtaining the second user information of the UE is sent 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 second user information has been updated, the stored user information is updated according to the update information.

In the 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. 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 communication message carries After the service trigger instruction, the service trigger instruction sent by the local base station is received, and the 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.

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, continue to perform step 302 to send a request to obtain the first user information of the UE to the first network node of the remote core network.

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;

Send 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.

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. The communication message carries the information 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 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 of the UE to the first network node. 2. The 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 , In order to deal with the interruption of the backhaul link, the communication of the connected 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 First sending module 12.

The first receiving module 11 is configured to receive the communication message sent 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, and the communication message carries the communication message 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 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, 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 second user information of the UE sent by the second network node at a set time interval. ask.

The first sending module 12 is also 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 has been updated, it will store data according to the updated information. The user information is updated.

In the embodiment of the present invention, the device 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 remote core network passes the authentication of the identity identifier.

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

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

The first receiving module 11 is also configured to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted and resumed. The trigger message is used to instruct the UE to send a service trigger instruction to the local base station so that the UE can The local base station sends a communication message, and after the communication message carries a 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 to allocate the second GUTI to the UE.

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

The first receiving module 11 is also 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. The communication message 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 to the first network node of the remote core network to obtain the first user information of the UE, 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 back up in real time The user information in the first network node of the remote core network is used to cope with the interruption of the backhaul link, and the communication of the connected 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 a communication message sent 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. The communication message carries the communication message of the UE. Identification

The second sending module 22 is 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 is not stored;

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

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

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

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

The second receiving module 21 is further configured to receive 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 has been updated.

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

The second monitoring module 25 is used 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 connection between the local network and the remote core network is detected The link is not interrupted, and 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 by the second sending module 22 is continued.

In the embodiment of the present invention, the device 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 when 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 indication message including the link A path interruption indication, an indication that the user information of the UE is not obtained, or an error indication.

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

The second receiving module 21 is further configured to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted. The trigger message is used to instruct the UE to send a service trigger instruction to the local base station so that the UE can send 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 second generating module 27 is configured to generate the first session information and allocate the first GUTI to the UE according to the creation of the session for the UE.

The second sending module 22 is further configured to send the first session information and the first GUTI to a local base station, so that the local base station performs a calculation on 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 to the first network node of the remote core network to obtain the first user information of the UE, 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 back up in real time The user information in the first network node of the remote core network is used to cope with the interruption of the backhaul link, and the communication of the connected UE is not affected.

The embodiment of the present invention provides a storage medium, the storage medium includes a stored program, wherein the device where the storage medium is located is controlled to execute each step of the above-mentioned information backup method when the program is running. For a detailed description, please refer to the above-mentioned information backup method.实施例。 Example.

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

Fig. 6 is a schematic diagram of a computer device provided by 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 running on the processor 41. When the computer program 43 is executed by the processor 41, In order to avoid repetition, the method applied to information backup in the implementation embodiment will not be repeated here. Alternatively, when the computer program is executed by the processor 41, the function of each model/unit in the positioning device applied to the root cause alarm in the embodiment is realized. In order to avoid repetition, it will not be 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. It may include more or less components than those shown in the figure, or a combination of certain components, or different components. For example, the computer device 4 may also include input and output devices, network access devices, buses, and so on.

The so-called processor 41 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also 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 may 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 (SD) card, and a flash memory card (Flash). Card) and so on. 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 can also be used to temporarily store data that has been output or will be output.

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

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, 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 unit implemented in the form of a software functional unit may 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 make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (Processor) execute the method described in each embodiment of the present invention. Part of the steps. The aforementioned storage media include: 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 code .

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

Claims (31)

An information backup method, characterized in that it 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, 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 identity to the second network node; The second network node stores the first user information of the UE. The method according to claim 1, further comprising: If the second network node determines that the first user information of the UE corresponding to the identity is stored, it sends a request for obtaining 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 second user information has been updated, the stored user information is updated according to the update information. The method according to claim 1, wherein 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 comprises: 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 is not interrupted, continue to execute the sending of the first network node of the remote core network to obtain the first user information of the UE The requested steps. The method according to claim 1, wherein 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 comprises: If the second network node of the local core network and the first network node of the remote core network communicate through the local base station forwarding, 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, continue to perform the step of sending a request to the first network node of the remote core network to obtain the first user information of the UE. The method according to claim 3, further comprising: 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: Discarding the communication message by the second network node; 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. The method according to claim 4, further comprising: 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 second network node, where the indication message includes a link interruption indication. The method according to claim 1, wherein 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 Before the communication message carries the identity of the UE, it further 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. The method according to claim 7, wherein the communication message includes an attach message or a location update message. The method according to claim 7, wherein the UE's mobile information is carried in the UE's communication message; The authentication of the UE by the remote core network includes: The remote core network authenticates the identity; After the remote core network authenticates the UE, the method further includes: If the remote core network passes the authentication of the identity identifier, the remote core network sends the acquired UE mobility information, subscription information, and security information 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 that after the local base station receives the communication message sent by the UE, it 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 communication message carries the step of the identity of the UE. The method according to claim 2, wherein after the second network node determines that the second user information has been updated, updating 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 trigger instruction; The local base station sends the service trigger instruction to the second network node 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 a local base station; The local base station updates the stored user information according to the first session information and the first GUTI. The method according to claim 10, 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 resumed, 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 trigger instruction to the first network node to trigger the first network node to create a session for the UE to generate second session information and allocate a second GUTI to the UE; The first network node sends a request for obtaining 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. An information backup method is characterized in that it is applied to a first network node of a remote core network and includes: Receiving the communication message sent 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 by the local base station, the communication message carrying 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; Sending the first user information of the UE corresponding to the identity to the second network node, so that the second network node stores the first user information of the UE. The method according to claim 12, wherein the application to the first network node of the remote core network further comprises: If the second network node determines that the first user information of the UE corresponding to the identity identifier is stored, receive the request for obtaining the second user information of the UE sent by the second network node at a set time interval; 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 has been updated, the stored user information is updated according to the update information. The method according to claim 12, wherein it is applied to the first network node of the remote core network, and after the receiving local base station receives the communication message sent by the UE, it is sent to the first network node of the remote core network The communication message with the second network node of the local core network, before the communication message carries the identity of the UE, further includes: If the remote core network passes the authentication of the identity, receiving the UE's movement information, subscription information, and security information 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, and then sends the communication message to the first network node of the remote core network With the second network node of the local core network, the communication message carries the step of the identity of the UE. The method according to claim 13, characterized in that it is applied to a first network node of a remote core network, and the second user information of the UE is sent to the second network node, so that the second network If the node determines that the second user information has been updated, after updating the stored user information according to the update information, the method further includes: When the local base station detects that the backhaul link is interrupted and resumed, the local base station sends a trigger message to the UE. 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 communication message carries the service triggering instruction, receiving the service triggering instruction sent by the local base station, and creating a session for the UE according to the service triggering instruction to generate second session information and allocating a 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. An information backup method, which is characterized in that it is applied to a second network node of a local core network and includes: Receiving a communication message sent 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 by the local base station, the communication message carrying 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, send 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; Storing the first user information of the UE. The method according to claim 16, wherein the second network node applied to the local core network further comprises: If it is determined that the first user information of the UE corresponding to the identity identifier is stored, sending a request for obtaining 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 second user information has been updated, the stored user information is updated according to the update information. The method according to claim 16, wherein the method is applied to the second network node of the local core network, and after determining that the first user information of the UE corresponding to the identity identifier is not stored, the method further comprises: 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, continue to perform the step of determining that the first user information of the UE corresponding to the identity is not stored. The method according to claim 16, wherein the method is applied to the second network node of the local core network, and after determining that the first user information of the UE corresponding to the identity identifier is not stored, the method further comprises: 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 the communication message; Send 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. The method according to claim 17, characterized in that it is applied to a second network node of the local core network, and if it is determined that the second user information has been updated, the stored user information is performed according to the updated information. After the update, it also includes: When the local base station detects that the backhaul link is interrupted, the local base station sends a trigger message to the UE. 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 communication message carries the service trigger instruction, the service trigger instruction sent by the local base station is received, and the first session information is generated according to the creation of the session for the UE and the first GUTI is allocated to the UE. The first session information and the first GUTI are sent to a local base station, so that the local base station updates the stored user information according to the first session information and the first GUTI. An information backup device, characterized in that it is applied to a first network node of a remote core network, and the device includes: The first receiving module is configured to receive a communication message sent 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, and the communication message carries the communication message of the UE. Identification The first receiving module is further configured to receive the first user information of the UE to the first network node of the remote core network if the second network node determines that the first user information of the UE corresponding to the identity is not stored. ask; The first sending module is configured to send the first user information of the UE corresponding to the identity to the second network node, so that the second network node stores the first user information of the UE. The device according to claim 21, wherein, applied to a first network node of a remote core network, the device further comprises: 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 is stored, receive a request for obtaining the second user information of the UE sent by the second network node at a set time interval ； The first sending module is also configured to send second user information of the UE to the second network node, so that if the second network node determines that the second user information has been updated, it will update the stored information according to the updated information. User information is updated. The device according to claim 21, wherein, applied to a first network node of a remote core network, the device further comprises: 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 remote core network passes the authentication of the identity identifier; The first generating module is configured to generate user information according to the movement information, the subscription information, and the security information. The device according to claim 21, wherein, applied to a first network node of a remote core network, the device further comprises: The first receiving module is also configured to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted and resumed. The trigger message is used to instruct the UE to send a service trigger instruction to the local base station so that the UE can send a service trigger instruction to the local base station. The base station sends a communication message, and after the communication message carries a 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 to allocate a second GUTI to the UE; The first sending module is further configured to send a request for obtaining 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. An information backup device, characterized in that it is applied to a second network node of a local core network, and the device includes: The second receiving module is configured to receive a communication message sent 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, and the communication message carries the information of the UE. Identification The second sending module is 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 first user information of the UE corresponding to the identity identifier sent by the first network node; The second storage module is used to store the first user information of the UE. The device according to claim 25, wherein, applied to a second network node of a local core network, the device further comprises: The second sending module is further configured to, if it is determined that the first user information of the UE corresponding to the identity identifier is stored, send a request for obtaining the second user information of the UE to the first network node at a set time interval; The second receiving module is further configured to receive 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 been updated. The device according to claim 25, wherein, applied to a second network node of a local core network, the device further comprises: The second monitoring module is used 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 it is detected The link between the local network and the remote core network is not interrupted, and 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. The device according to claim 25, wherein, applied to a second network node of a local core network, the device further comprises: The second discarding module is configured to discard the communication message if it is detected 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 when 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 indication message including the link An interruption indication, an indication that the user information of the UE is not obtained, or an error indication. The device according to claim 25, wherein, applied to a second network node of a local core network, the device further comprises: The second receiving module is also used to send a trigger message to the UE when the local base station detects that the backhaul link is interrupted. The trigger message is used to instruct the UE to send a service trigger instruction to the local base station so that the UE can send 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 second generating module is configured to generate the first session information and allocate the first GUTI to the UE according to the creation of the session for the UE. The second sending module is further configured to send the first session information and the first GUTI to a local base station, so that the local base station updates the stored user information according to the first session information and the first GUTI . A storage medium, characterized in that the storage medium includes a stored program, wherein the device where the storage medium is located is controlled to execute the information backup method according to any one of claims 1 to 11 when the program is running. A computer device, including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, characterized in that the program instructions are loaded and executed by the processor to achieve The steps of the information backup method according to any one of claims 1 to 11.

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