CN105208606A - Method of redirection, node equipment and core network equipment - Google Patents

Abstract

The embodiment of the present invention discloses a node device, which is arranged between the access network device group and the core network device group, and is respectively connected to each device in the access network device group and the core network device group; the node device receives A service redirection request sent by the first core network device in the core network device group; responding to the service redirection request, determining a second core network device that can accept the service in the core network device group; The second core network device sends a service acceptance request; receives a service acceptance response from the second core network device, confirms that the node device has completed the redirection interaction with the second core network device, and reports to the first core network The network device sends a confirmation message. The embodiment of the invention also discloses a core network device and a redirection method at the same time.

Description

A redirection method, node device and core network device

technical field

The invention relates to redirection technology in the field of wireless communication, in particular to a redirection method, node equipment and core network equipment.

Background technique

In the field of mobile communications, with the continuous expansion of the network scale, the more users switch between different wireless access networks, the network has higher and higher requirements for the utilization rate and reliability of core network equipment, such as: If an incident causes a surge in the traffic burdened by a single core network device, it is necessary to consider that the core network device has the function of balancing the peak effect; in addition, the core network device should also have the ability to balance tidal traffic, or consider the need for energy saving Sleep the boards with low resource consumption in itself. When the traffic increases sharply, the core network equipment will wake up the dormant boards. In this process, a mechanism is needed to ensure the continuity and success rate of new services. For this reason, the proposed The core network equipment pooling technology has been introduced.

In the existing implementation mechanism, the core network device and the access network device adopt a mesh connection mode, so that there is a reachable route between any core network device and any access network device. For example, FIG. 1 is a schematic diagram of the networking mode of core network equipment and access network equipment based on pooling in the prior art. Referring to FIG. 1, there are two core network equipment 111 in the core network equipment group 11, and the access There are three access network devices 121 in the network device group 12 , and any one core network device 111 is connected to any one access network device 121 . Then, in the redirection process, if these five devices complete the redirection process, twelve instructions are required, and in the actual network, many core network devices and access network devices will be deployed, so when these devices are connected When signaling is exchanged, the number of signaling will be quite large, occupying a large amount of system resources.

From this, it can be seen that in the prior art, there is a technical problem of high consumption of system resources due to high network signaling overhead.

Contents of the invention

In view of this, the embodiment of the present invention expects to provide a redirection method, a node device and a core network device, so as to reduce network signaling overhead and save system resources.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

In the first aspect, the embodiment of the present invention provides a node device, which is arranged between the access network device group and the core network device group, and is respectively connected to each device in the access network device group and the core network device group connection; the node device includes: a first transceiver and a first processor; wherein the first transceiver is configured to receive a service redirection request sent by a first core network device in the core network device group; It is used to send a service acceptance request to a second core network device that can accept services in the core network device group; receive a service acceptance response from the second core network device, and confirm that the communication with the second core network device has been completed Redirecting interaction, and sending a confirmation message to the first core network device; the first processor is configured to respond to the service redirection request, and determine the second core network device in the core network device group .

Further, the first processor is specifically configured to respond to the service redirection request and obtain the load status of each core network device in the core network device group; Determine the second core network device.

Further, the first transceiver is also configured to receive a processing capability recovery notification from the first core network device, so that the node device redirects the service from the second core network device to the First core network equipment.

In a second aspect, an embodiment of the present invention provides a core network device, the core network device is connected to a node device; the core network device includes: a second transceiver and a second processor; wherein the second processor , used to determine that the service load exceeds the processing threshold; the second transceiver is used to send a service redirection request to the node device; and is also used to receive a confirmation message from the node device, confirming that the node device has completed Redirected interaction with another core network device.

Further, the second transceiver is further configured to send a processing capability restoration notification to the node device after the processing capability of the core network device to which it belongs is restored, so that the node device transfers the service from the other A core network device is redirected to the core network device to which it belongs.

In a third aspect, the implementation of the present invention provides a core network device, the core network device is connected to a node device; the core network device includes: a third transceiver and a third processor; wherein, the third transceiver is used for receiving the service acceptance request sent by the node device, and sending a service acceptance response to the node device, so that the node device confirms that the node device has completed the communication with the core network device after receiving the service acceptance response redirection interaction, and send a confirmation message to another core network device.

In the fourth aspect, the embodiment of the present invention provides a redirection method, which is applied to a node device, and the node device is set between an access network device group and a core network device group, and is respectively connected to the access network device group And each device in the core network device group is connected; the method includes: receiving a service redirection request sent by the first core network device in the core network device group; responding to the service redirection request, in the core network Determining a second core network device that can accept the service in the device group; sending a service acceptance request to the second core network device; receiving a service acceptance response from the second core network device, and confirming that the node device has completed interact with the redirection of the second core network device, and send a confirmation message to the first core network device.

Further, the determining the second core network device that can accept the service in the core network device group includes: obtaining the load status of each core network device in the core network device group; The second core network device is determined in the core network device group.

Further, after the confirmation message is sent to the first core network device, the method further includes: receiving a processing capability recovery notification sent by the first core network device, and causing the node device to transfer the service from The second core network device redirects to the first core network device.

In a fifth aspect, an embodiment of the present invention provides a redirection method, which is applied to a first core network device, and the first core network device is connected to a node device; the method includes: when determining that the business load exceeds a processing threshold, Sending a service redirection request to the node device; receiving a confirmation message from the node device, confirming that the node device has completed the redirection interaction with the second core network device that can accept the service.

Further, after the first core network device receives the confirmation message from the node device, the method further includes: after the processing capability is restored, sending a processing capability recovery notification to the node device, so that the node device redirecting the service from the second core network device to the first core network device.

In a sixth aspect, an embodiment of the present invention provides a redirection method, which is applied to a second core network device, and the second core network device is connected to a node device; the method includes: receiving a service from the node device Accepting the request; sending a service acceptance response to the node device, so that the node device confirms that the node device has completed the redirection interaction with the second core network device after receiving the service acceptance response, and sends The first core network device sends a confirmation message.

The redirection method, node device and core network device provided by the embodiment of the present invention are provided with a node device between the access network device group and the core network device group, and the node device is connected to the access network device group and the core network device respectively Each device in the group is connected, so that a star topology is formed between the core network device and the node device, and between the access network devices. In this way, during the redirection process, the first core network device in the core network device group sends a service redirection request to the node device, and the node device responds to the service redirection request, and determines in the core network device group that the first core network device that can accept the redirection service Two core network devices, and send a service acceptance request to the second core network device; then, the second core network device replies with a service acceptance response to the node device, and the node device confirms that the communication with the second core network device has been completed after receiving the service acceptance response Redirect the interaction, and send a confirmation message to the first core network device. In this way, during the redirection process, the core network equipment only needs to perform signaling interaction with the node equipment. In this way, the number of signaling in the network is greatly reduced, which effectively solves the problems existing in the prior art due to the large network signaling overhead. The technical problem that leads to large consumption of system resources reduces network signaling overhead and saves system resources.

Description of drawings

FIG. 1 is a schematic diagram of a networking mode of core network equipment and access network equipment based on pooling in the prior art;

FIG. 2 is a schematic structural diagram of a wireless communication system in an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a redirection method in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a CS domain system in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a redirection process performed by a CS domain system in an embodiment of the present invention;

FIG. 6 is a schematic flowchart of a method for redirecting at the node device side in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a node device in an embodiment of the present invention;

FIG. 8 is a schematic flowchart of a method for performing redirection on the first core network device side in an embodiment of the present invention;

FIG. 9 is a schematic flowchart of a method for redirecting on the second core network device side in an embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a core network device in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

An embodiment of the present invention provides a wireless communication system. FIG. 2 is a schematic structural diagram of a wireless communication system in an embodiment of the present invention. Referring to FIG. 2, the system includes: a node device 10, a core network device group 20, and an access network device Group 30; where,

The core network device group 20 includes a first core network device 21 and a second core network device 22 for processing service information forwarded by the node device 10;

In practical applications, the core network device group 20 may include two or more core network devices, and the number of core network devices is not limited and can be determined according to network construction needs.

The access network device group 30 includes at least one access network device, configured to send service information to node devices;

The node device 10 has a communication interface function and a routing function, and is arranged between the core network device group 20 and the access network device group 30. It adopts a dual-plane structure that can ensure system reliability, and is connected to each core network device to form a star Topology; connect with each access network device to form a star topology.

In conjunction with the embodiment of the present invention, in the above system, the node device 10 is configured to receive a service redirection request sent by the first core network device 21 in the core network device group 20; in response to the service redirection request, in the core network device group In 20, determine the second core network device 22 that can accept the service; send a service acceptance request to the second core network device 22; receive a service acceptance response from the second core network device 22, and confirm that the node device 10 has completed the communication with the second core network The redirection interaction of the device 22, and sending a confirmation message to the first core network device 21;

Here, the second core network device that can accept services determined by the node device may be: the node device determines to select a core network device as the redirected core according to the current load status of each core network device in the core network device group network equipment.

The first core network device 21 is configured to send a service redirection request to the node device 10 when it is used to determine that the business load exceeds the processing threshold; receive a confirmation message from the node device 10, and confirm that the node device 10 has completed the communication with the core network device group 20. Redirection interaction of the second core network device 22 receiving the service;

Here, the processing threshold may be preset according to the service processing capability and service requirements of the core network equipment itself.

The second core network device 22 is used to receive a service acceptance request from the node device 10; send a service acceptance response to the node device 10, so that the node device 10 confirms that the node device 10 has completed the communication with the second core after receiving the service acceptance response. Network device 22 redirection interaction, and send a confirmation message to the first core network device 21.

In practical applications, each core network device and each access network device needs to be configured with a parameter: the address of the node device, which is used to point the core network device to the node device so that it can communicate with the node device; It also points to the node device so that it can communicate with the node device. Since only one parameter needs to be configured, the configuration work of both the core network device and the access network device is greatly reduced.

In this embodiment, the core network device in the core network device group 20 may be a circuit switched (CS, CircuitSwitchedDomain) domain core network device, such as a mobile switching center (MSC, MobileSwitchingCenter), and may also be a packet switched (PS, PacketSwitching) Domain core network equipment, such as Serving General Packet Radio Service Support Node (SGSN, ServingGeneralPacketRadioServiceSupportNode), Mobility Management Entity (MME, MobilityManagementEntity), of course, can also be other equipment, which is not specifically limited in the present invention.

The access network device in the access network device group 30 can be a radio network controller (RNC, RadioNetworkController), or a base station (eNB, evolvedNodeB) in the LTE system, and of course, can also be other devices, which are not included in the present invention. Be specific.

An embodiment of the present invention provides a redirection method. FIG. 3 is a schematic flowchart of a redirection method in an embodiment of the present invention. Referring to FIG. 3 , the redirection method includes:

S301: When the first core network device determines that the service load exceeds the processing threshold, send a service redirection request to the node device;

Specifically, the first core network equipment may be overloaded due to a failure, or the processing capacity of some boards may be reduced due to energy-saving requirements. The first core network device will judge whether the current business load exceeds its own processing capacity through an internal mechanism, that is, compare the business load with the processing threshold, and send a service redirection request to the node device when it is determined that the business load exceeds the processing threshold. In order to alleviate the service pressure of the first core network equipment and realize load balancing.

In practical applications, the above processing threshold is set by the operator according to the first core network equipment's own processing capability and service requirements, and is stored in the core network equipment in advance.

S302: The node device responds to the service redirection request, and determines the second core network device that can accept the service in the core network device group;

In practical application, S302 may be: the node device responds to the service redirection request, obtains the load status of each core network device in the core network device group; and determines the second core network device based on the load status.

Specifically, the node device responds to the service redirection request, calculates and obtains the load status of each core network device in the core network device group, and sees which core network device can accept the service that needs to be redirected according to the load status, and will accept the core network device of the service The network device is determined as the second core network device.

S303: The node device sends a service acceptance request to the second core network device;

S304: The second core network device sends a service acceptance response to the node device;

S305: The node device confirms that the redirection interaction with the second core network device has been completed, and sends a confirmation message to the first core network device.

In a specific implementation process, the confirmation message may also carry address information of the second core network device.

In another embodiment, after S305, after the processing capability is recovered, the first core network device may also send a processing capability recovery notification to the node device, so that the node device can redirect services to the first core network device.

So far, the node device has redirected the service from the first core network device to the second core network device, then, when the access network device in the access network device group sends service information to the node device, the node device forwards the service information For the second core network equipment, business continuity and system reliability are guaranteed.

The above process will be described below with specific examples.

Assume that FIG. 4 is a schematic structural diagram of a CS domain system in an embodiment of the present invention. As shown in FIG. 4 , there is a core network device group 41, an access network device group 42, and a node device 43 in the CS domain system. The core network device group 41 includes two devices MSC1 and MSC2, and the access network device group 42 includes three devices RNC1, RNC2 and RNC3; MSC1 and MSC2 are respectively connected to the node device 43 to form a star topology; RNC1, RNC2 and RNC3 are also respectively connected to node devices 43 to form a star topology.

FIG. 5 is a schematic diagram of a redirection process performed by a CS domain system in an embodiment of the present invention. Referring to FIG. 5 , the redirection process is as follows:

S501: When MSC1 fails, MSC1 determines that the service load exceeds the processing threshold;

S502: MSC1 sends a service redirection request to the node device;

Wherein, the service redirection request is used to request the node device to redirect the service;

S503: The node device responds to the service redirection request, calculates and obtains the load status of each core network device in the core network device group, and determines that MSC2 is a core network device that can accept services according to these load statuses;

That is to say, the node device calculates the load status of each core network device to see which core network device can accept the service, and finds that MSC2 can accept the service.

S504: The node device sends a service acceptance request to MSC2;

Wherein, the service acceptance request is used to request MSC2 to accept the service.

S505: MSC2 sends a service acceptance response to the node device;

S506: The node device sends confirmation information to MSC1.

Wherein, the confirmation message is used to confirm that the node device completes the redirection interaction with the MSC2. In a specific implementation process, the confirmation message may also carry the address information of MSC2.

So far, the service redirection process is completed. RNC1, RNC2, and RNC3 only need to send service information to the node device, and the node device then sends it to MSC2, thus ensuring service continuity and system reliability.

Compared with the prior art, in the case where there are also two MSCs and three RNCs in the system, in the embodiment of the present invention, only four interaction signalings are needed to complete the entire redirection process, while in the prior art , twelve interactive signaling is required, obviously, the signaling overhead in the network is greatly reduced, the system resource occupied by the signaling is reduced, and the system resource is further saved.

Further, when the failure of MSC1 is eliminated, MSC1 can also send a processing function recovery notification to the node device. When the node device receives the notification, it knows that MSC1 has recovered. Then, when MSC2 fails, the load is too high or some boards are dormant , the service can be redirected back to MSC1 again.

To sum up, a node device is set between the access network device group and the core network device group, and the node device is respectively connected to each device in the access network device group and the core network device group, so that the access network device and the core network device group Core network devices form a star-shaped, flat network structure through newly added node devices, which can reduce the complexity of devices in the system and reduce device configuration work; further, during the redirection process, core network devices only need to follow the The interaction between node devices does not need to interact with multiple access network devices as in the prior art, which can greatly reduce the signaling overhead in the network and save system resources; further, in the redirection process, the access network devices do not need to sense The change of the processing capacity of the first core network equipment does not need to calculate the load status of the core network equipment. It only needs to send the service information to the node equipment according to the parameter configuration, which can reduce the system resource occupancy rate of the access network equipment. .

Based on the same inventive concept, the present invention provides a redirection method. FIG. 6 is a schematic flowchart of a redirection method on the node device side in an embodiment of the present invention. Referring to FIG. 6 , the method includes:

S601: Receive a service redirection request sent by the first core network device in the core network device group;

S602: Responding to the service redirection request, determine a second core network device that can accept services in the core network device group;

Specifically, S602 may be: obtaining the load status of each core network device in the core network device group; and determining the second core network device based on the load status.

S603: Send a service acceptance request to the second core network device;

S604: Receive a service acceptance response from the second core network device, confirm that the node device has completed redirection interaction with the second core network device, and send a confirmation message to the first core network device.

Further, after S604, the method further includes: receiving a processing capability restoration notification sent by the first core network device, so that the node device can redirect services from the second core network device to the first core network device.

Based on the same inventive concept, an embodiment of the present invention provides a node device, where the node device is consistent with the node device described in one or more embodiments above. FIG. 7 is a schematic structural diagram of a node device in an embodiment of the present invention. Referring to FIG. 7 , the node device includes: a first transceiver 71 and a first processor 72; wherein, the first transceiver 71 is used to receive the The service redirection request sent by the first core network device in the network device group; it is also used to send a service acceptance request to the second core network device that can accept services in the core network device group; it is also used to receive the request from the second core network device The service acceptance response confirms that the node device has completed the redirection interaction with the second core network device, and sends a confirmation message to the first core network device; the first processor 72 is used to respond to the service redirection request, and in the core network device The second core network device is determined in the group.

Further, the first processor 72 is specifically configured to respond to the service redirection request, obtain the load status of each device in the core network device group; and determine the second core network device based on the load status.

Further, the first transceiver 71 is also configured to receive a processing capability recovery notification from the first core network device, so that the node device can redirect services from the second core network device to the first core network device.

Based on the same inventive concept, an embodiment of the present invention provides a redirection method. FIG. 8 is a schematic flowchart of a method for redirecting on the first core network device side in an embodiment of the present invention. Referring to FIG. 8 , the method includes:

S801: When it is determined that the service load exceeds the processing threshold, send a service redirection request to the node device;

S802: Receive a confirmation message from the node device, confirming that the node device has completed redirection interaction with the second core network device.

Further, after the first core network device receives the confirmation message from the node device, the method further includes: after the processing capability is restored, sending a processing capability recovery notification to the node device, so that the node device can transfer the service from the second core network device Redirect to the first core network device.

Based on the same inventive concept, an embodiment of the present invention provides a method for redirection. FIG. 9 is a schematic flowchart of a method for redirecting on the second core network device side in an embodiment of the present invention. Referring to FIG. 9 , the method includes:

S901: Receive a service acceptance request from a node device;

Wherein, the service acceptance request is sent by the node device after receiving the service redirection request from the first core network device.

S902: Send a service acceptance response to the node device, so that the node device confirms that the node device has completed redirection interaction with the second core network device after receiving the service acceptance response, and sends a confirmation message to the first core network device.

Based on the same inventive concept, an embodiment of the present invention provides a core network device, where the core network device is consistent with the first core network device described in one or more embodiments above. FIG. 10 is a schematic structural diagram of a core network device in an embodiment of the present invention. Referring to FIG. 10, the core network device includes: a second processor 101 and a second transceiver 102; wherein the second processor 101 is used to determine The service load exceeds the processing threshold; the second transceiver 102 is used to send a service redirection request to the node device; and is also used to receive a confirmation message from the node device, confirming that the node device has completed the redirection interaction with the second core network device.

In practical applications, each core network device and each access network device needs to configure a parameter: the address of the node device, that is, point the core network device to the node device so that it can communicate with the node device; point the access network device to the node device The device can communicate with the node device, which greatly reduces the configuration work of the device.

In this embodiment, the core network device may be a circuit switching (CS, CircuitSwitchedDomain) domain core network device, such as a mobile switching center (MSC, MobileSwitchingCenter), or a packet switching (PS, PacketSwitching) domain core network device, such as a general The packet radio service serving support node (SGSN, ServingGeneralPacketRadioServiceSupportNode), mobility management entity (MME, MobilityManagementEntity), of course, can also be other devices, which are not specifically limited in the present invention.

Further, the second transceiver 102 is also configured to send a processing capability restoration notification to the node device after the processing capability of the core network device is restored, so that the node device can redirect services from the second core network device to the core network device .

Based on the same inventive concept, an embodiment of the present invention provides a core network device, where the core network device is consistent with the second core network device described in one or more embodiments above. The core network equipment includes: a third transceiver and a third processor; the third transceiver is used to receive the service acceptance request sent by the node device, and send a service acceptance response to the node device, so that the node device receives the service acceptance response Afterwards, it is confirmed that the node device has completed the redirection interaction with the core network device, and sends a confirmation message to the first core network device; the third processor is configured to process the service information sent by the node device.

Wherein, the service acceptance request is used to request the core network equipment to accept the service.

In practical applications, the functions of the third transceiver may be completed by the second transceiver 102 described in one or more embodiments above, and the functions of the third processor may also be completed by the second processor 101, that is to say , the functions of the first core network device and the second core network device may be integrated into one core network device.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (12)

1. The node equipment is characterized by being arranged between an access network equipment group and a core network equipment group and respectively connected with each equipment in the access network equipment group and the core network equipment group; the node device includes: a first transceiver and a first processor; wherein,

the first transceiver is configured to receive a service redirection request sent by a first core network device in the core network device group; the core network device group is also used for sending a service receiving request to a second core network device which can receive the service in the core network device group; receiving a service acceptance response from the second core network device, confirming that the redirection interaction with the second core network device is completed, and sending a confirmation message to the first core network device;

the first processor is configured to determine, in the core network device group, the second core network device in response to the service redirection request.

2. The node device of claim 1, wherein the first processor is specifically configured to obtain, in response to the service redirection request, a load state of each core network device in the core network device group; determining the second core network device in the core network device group based on the load status.

3. The node device of claim 1, wherein the first transceiver is further configured to receive a processing capability recovery notification from the first core network device, so that the node device redirects the traffic from the second core network device to the first core network device.

4. A core network device, wherein the core network device is connected to a node device; the core network device includes: a second transceiver and a second processor; wherein,

the second processor is configured to determine that a traffic load exceeds a processing threshold;

the second transceiver is configured to send a service redirection request to the node device; and the node device is further configured to receive a confirmation message from the node device, confirming that the node device has completed redirection interaction with another core network device.

5. The core network device according to claim 4, wherein the second transceiver is further configured to send a processing capability recovery notification to the node device after the processing capability of the core network device to which the node device belongs is recovered, so that the node device redirects the service from the another core network device to the core network device to which the node device belongs.

6. A core network device, wherein the core network device is connected to a node device; the core network device includes: a third transceiver and a third processor; wherein,

and a third transceiver, configured to receive the service acceptance request sent by the node device, send a service acceptance response to the node device, so that after receiving the service acceptance response, the node device confirms that the node device has completed redirection interaction with the core network device, and send a confirmation message to another core network device.

7. A redirection method is applied to node equipment, wherein the node equipment is arranged between an access network equipment group and a core network equipment group and is respectively connected with each equipment in the access network equipment group and the core network equipment group; the method comprises the following steps:

receiving a service redirection request sent by first core network equipment in a core network equipment group;

responding to the service redirection request, and determining second core network equipment which can accept the service in the core network equipment group;

sending a service acceptance request to the second core network equipment;

and receiving a service acceptance response from the second core network device, confirming that the node device completes redirection interaction with the second core network device, and sending a confirmation message to the first core network device.

8. The method of claim 7, wherein the determining, in the core network device group, a second core network device that can accept the service comprises:

acquiring the load state of each core network device in the core network device group;

determining the second core network device in the core network device group based on the load status.

9. The method of claim 7, wherein after the sending the acknowledgement message to the first core network device, the method further comprises:

and receiving a processing capability recovery notification sent by the first core network device, so that the node device redirects the service from the second core network device to the first core network device.

10. A redirection method is applied to a first core network device, wherein the first core network device is connected with a node device; the method comprises the following steps:

when the service load is determined to exceed the processing threshold, sending a service redirection request to the node equipment;

and receiving a confirmation message from the node equipment, and confirming that the node equipment completes redirection interaction with second core network equipment which can accept the service.

11. The method of claim 10, wherein after the first core network device receives the acknowledgement message from the node device, the method further comprises:

and after the processing capability is recovered, sending a processing capability recovery notification to the node equipment, so that the node equipment redirects the service to the first core network equipment from the second core network equipment.

12. A redirection method is applied to a second core network device, wherein the second core network device is connected with a node device; the method comprises the following steps:

receiving a service acceptance request from the node equipment;

and sending a service acceptance response to the node equipment, so that the node equipment confirms that the node equipment completes redirection interaction with the second core network equipment after receiving the service acceptance response, and sends a confirmation message to the first core network equipment.