CN108271149B

CN108271149B - Method, equipment and system for migrating user data anchor points

Info

Publication number: CN108271149B
Application number: CN201611256581.0A
Authority: CN
Inventors: 苏岩; 夏渊; 朱泉; 袁立平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2021-09-14
Anticipated expiration: 2036-12-30
Also published as: WO2018120822A1; CN108271149A

Abstract

The invention provides a method, a device and a system for migrating user data anchor points, which mainly comprise the following steps: the control plane gateway configures a first data plane gateway as a main device of an IP group and configures a second data plane gateway as a standby device of the IP group; allocating an IP address for the user equipment from the IP group, and establishing a user context; and after the migration, the control plane gateway sends the user context information to the second data plane gateway. The invention increases the flexibility of the system and saves the storage resources through the anchor point migration with the granularity of the IP group.

Description

Method, equipment and system for migrating user data anchor points

Technical Field

The present invention relates to the field of communications, and in particular, to a method, device, and system for migrating a user data anchor point.

Background

With the further development of wireless communication technology from 4G to 5G, in order to improve the flexibility of the network, a service gateway and a PDN gateway are further separated into a Control plane and a User plane (CU), and after separation, a Control plane gateway device CGW (Control gateway) and a data plane gateway device DGW (data gateway) of the gateway are formed, where the CGW can Control the processing operation of the DGW on a data packet. When a user accesses a PDN network, uplink and downlink user data packets pass through a base station and a DGW, and the DGW completes data forwarding according to the established context. The DGW is the anchor point for the user data.

In order to improve the reliability of a user accessing a data network, a DGW is generally backed up, and generally, context information of a currently used DGW, that is, a currently used DGW, is backed up in another standby DGW.

In this backup mode, the standby DGW occupies the same storage resources as the main DWG to store the context of the user, and the system efficiency is very low.

Disclosure of Invention

In order to overcome the defects of the prior art, embodiments of the present invention provide a method, a device, and a system for user data anchor point migration, so as to save storage resources and improve system flexibility.

In a first aspect, an embodiment of the present invention provides a method for migrating a user data anchor point, including: the control plane gateway configures a first data plane gateway as a main device of an IP group and configures a second data plane gateway as a standby device of the IP group; after the user is online, an IP address is distributed for the user equipment from the IP group, and a user context is established; and after the main/standby switching anchor point is migrated, sending user context information to the second data plane gateway, wherein the user context information is used for processing a user data packet after the second data plane gateway receives the user context information.

In the method, the data plane gateway master-slave switching with the granularity of the IP group saves storage resources and improves the use efficiency and the flexibility of the system.

In one possible design, the IP group includes an interface address, and the interface address includes one or more of the following: an S1U interface address, an S5 interface address, an S8 interface address, an S4 interface address, an S12 interface address, and the like. Further, the IP group includes an IP address or an IP address field for allocation to the user equipment. By configuring the interface address and the UE address separately, system flexibility is further increased.

In yet another possible design, the control plane gateway configures the first data plane gateway as a high priority route for the IP addresses contained in the IP group; the second data plane gateway is configured as a low priority route for the IP addresses contained in the IP group. The flexibility of the system is further increased by the routing configuration with high and low priority.

In yet another possible design, the control plane gateway indicates to the first data plane gateway that the first data plane gateway is the primary device of the IP group, and the first data plane gateway issues a high priority route that is itself an IP address contained in the IP group; the control plane gateway indicates to the second data plane gateway that the second data plane gateway is a standby device of the IP group, and the second data plane gateway issues a low priority route that is itself an IP address contained in the IP group. Or the control plane gateway directly issues the high priority route and the low priority route. The flexibility of the system is further increased through different configuration modes.

In yet another possible design, sending the user context information to the second data plane gateway is triggered by the second data plane gateway receiving an uplink data packet or a downlink data packet of the user equipment. The user contexts are not required to be sent to the second data plane gateway all at once, so that the system performance is improved, and the system flexibility is further improved.

In a second aspect, an embodiment of the present invention provides a control plane gateway, which has a function of implementing a control plane gateway behavior in the foregoing method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more units corresponding to the functions, such as a configuration unit, a context unit and a sending unit.

In one possible design, the control plane gateway may be configured to include a processor and a memory, the memory storing application program code supporting the control plane gateway to perform the above method, and the processor may be configured to execute the program stored in the memory. The control plane gateway may further comprise a communication interface for the control plane gateway to communicate with other devices.

In a third aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the control plane gateway, which includes a program for executing the control plane gateway according to the above aspect.

In a fourth aspect, an embodiment of the present invention provides a system for migrating a user data anchor point, where the system includes a control plane gateway, a first data plane gateway, and a second data plane gateway, and each of the control plane gateway, the first data plane gateway, and the second data plane gateway has a function of implementing a respective behavior in the foregoing method.

According to the technical scheme provided by the embodiment of the invention, the data plane gateway master-slave switching with the granularity being the IP group saves storage resources and greatly improves the use efficiency and flexibility of the system.

Drawings

Fig. 1 is a system architecture diagram for implementing user data anchor point migration according to an embodiment of the present invention;

fig. 2 is another system architecture diagram for implementing user data anchor point migration according to an embodiment of the present invention;

fig. 3 is a schematic flowchart of a method for implementing user data anchor point migration according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a control surface device according to an embodiment of the present invention;

fig. 5 is another schematic structural diagram of a control surface device according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1, an embodiment of the present invention provides a communication system for implementing user data anchor point migration, which includes a control plane gateway (CGW)101, a data plane gateway (DGW)102, a Mobility Management Entity (MME) 103, a base station (evolved NodeB, eNB)104, and a Router (Router) 105.

The base station 104 provides radio access for User Equipment (UE). The mobility management entity 103 is used for access control, mobility management, and the like of the UE. The data plane gateway 102 is used for data connection of the UE to the Internet via the base station. The control plane gateway 101 is used to control the data plane gateway to process the data packet. The router 105 is used to physically connect the above devices and to connect to the external network Internet. The actual deployment of the router in the figure is usually a router network, which connects the above devices of the mobile core network.

The dotted lines in fig. 1 indicate the signaling connection relationship between the devices. And the two-way arrows between the data plane gateway 102 and the base station 104 and between the data plane gateway and the Internet represent the logical link relationship of the UE for transmitting and receiving data. Fig. 1 includes two data plane gateways, one for active and one for standby of an IP group. The data plane gateway and the control plane gateway may be network elements obtained by separating the service gateway CU, PDN gateway CU, or CUs after combining the service gateway and the PDN gateway.

The IP group includes interface addresses used in processing the user data packets, and the interface addresses include one or more of the following: an S1U interface address, an S5 interface address, an S8 interface address, an S4 interface address, and an S12 interface address. The IP group also includes a set of IP addresses or address fields for the users assigned to the user equipment for accessing the wireless network. When the primary and standby IP group switches, that is, the data anchor point migrates, the routes of the interface address and the user address in the IP group are switched from the data plane gateway 1 to the data plane gateway 2.

In the embodiment of the invention, one CGW may control a plurality of DGWs, and each DGW can be configured with a plurality of IP groups. For example, a CGW may control tens of DGWs for actual deployment, each DGW may have hundreds of groups, each group may have thousands of users, and thus, a CGW service may serve millions of users. These DGWs may be backups of each other's IP group. For example, IP group 1 uses DGW1 as the primary, DGW2 as the backup; IP group 2 uses DGW2 as the primary and DGW1 as the backup. Multiple IP groups on one DGW may be backed up by different other DGWs. For example. The DGW1 has IP groups 1, 2, and 3 active, and their spare DGWs are DGW2, DGW3, and DGW4, respectively. In short, the main and standby data plane gateways of different IP groups can be flexibly configured. While the granularity of data anchor migration is IP groups. The CGW may allocate different IP groups on different DGWs according to a load sharing algorithm. The selection of the active and standby DGWs of the IP group can be comprehensively considered by the operator according to the factors such as location and capacity.

As shown in fig. 2, in a network in which an SDN (Software-Defined Networking) controller and a switch are deployed, functions of the SDN controller and the switch are similar to those of the above router, and a CGW issues routing information of an IP group to the SDN controller, and then the controller converts the routing information into a flow table entry and issues the flow table entry to the switch by using an Openflow protocol.

Further, an SDN controller may be built into the CGW, or an SDN switch may be built into the DGW. And will not be described in detail herein. The following specific method flow of data anchor migration is exemplified by the system in fig. 1.

Fig. 3 shows a method for migrating a user data anchor point according to an embodiment of the present invention, which is applied to the system shown in fig. 1. In the method, the CGW is respectively configured with a DGW1 and a DGW2 as a primary device and a standby device of an IP group, and when the primary device is detected to be failed, the service is transferred from the primary device to the standby device. The method specifically comprises the following steps:

301, DGW1 sends a configuration request message to the CGW. This may be sent after DGW1 is powered up or may be sent according to a system configuration command.

302, the CGW allocates IP groups, carries the allocated IP group information in a configuration response message and returns the configuration response message to the DGW1, and carries the primary and backup indication information in the configuration response message, indicating that the DGW1 is the primary DGW of the IP group. The IP group comprises interface addresses of the IP group, such as S1U address, S5/S8 address, S4 address, S12 address and the like. The IP group may also include an IP address or address field that is subsequently assigned to the user device.

303, the DGW1 configures the interface address according to the configuration response message, and issues the high-priority route of the IP group to the router according to the master/standby indication information. The release route may use Border Gateway Protocol (BGP), Open Shortest Path First (OSPF), or the like. The route that DGW1 issues to the router indicates that DGW1 is a high priority route for the IP addresses contained in the IP group. For example, table 1 below is two routes published into a router.

TABLE 1

DGW2 sends a configuration request message to the CGW 304. Again, this may be sent after DGW2 is powered on, or may be sent according to system configuration commands.

305, the CGW carries the IP group information allocated in step 302 in a configuration response message and returns the configuration response message to the DGW2, and carries the primary backup indication information in the configuration response message, indicating that the DGW2 is the backup DGW of the IP group.

And 306, the DGW2 configures the interface address according to the configuration response message, and issues the low-priority route of the IP group to the router according to the main standby indication information. The DGW2 published routes may also use BGP protocols, OSPF protocols, etc. The route that DGW2 issues to the router indicates that DGW2 is a low priority route for the IP addresses contained in the IP group. For example, table 2 below is two routes published into a router.

TABLE 2

Thus, the router includes the high priority and low priority routes of the IP group. After receiving the data packet, the router preferably selects the route with high priority to forward the data packet, and if the route with high priority is not reachable, selects the route with low priority to forward the data packet. After the routing is released, the DGW1 is the primary device of the IP group, and the related uplink and downlink packets are preferentially forwarded to the DGW1 for processing.

307, after the user equipment UE goes online, the activation is performed. The CGW sends a session generation request to DGW 1.

The DGW1 allocates the UE's IP address from the user IP address or address segment of the IP group and establishes the user context 308. DGW1 then returns a session generation response to the CGW, which contains the user context information.

The user context of the DGW may include an interface address (S1U/S5/S8 address), a Tunnel Identifier (TEID), a UE IP address, an Access Point Name (APN), a Quality of Service (QoS), a charging attribute, and the like. The context of the CGW may include, in addition to information about the DGW: UE Identity, MSISDN number (Mobile Subscriber Integrated Services Digital Network), IMSI number (International Mobile Subscriber Identity), IP group to which the UE IP address belongs, and the like.

309, after the session is generated, the DGW1 can provide the user equipment UE with uplink and downlink data packet transmission.

310: the router performs route switching when DGW1 is not reachable, e.g., DGW1 fails, resulting in the router not receiving the heartbeat message of DGW 1. Or the physical connection between DGW1 and the router is broken, resulting in the router not detecting signals of the physical line connecting DGW 1. The DGW1 is considered unreachable by the routers, which enable low priority routing for data forwarding. The router may also switch enabling low priority routing upon receiving a switch command. The upstream and downstream packets originally sent to DGW1 are forwarded to DGW 2.

311: DGW2 receives the uplink or downlink data packet of the user in the IP group, but there is no user context for processing the data packet in DGW2, and DGW2 sends an error indication message to the CGW, where the error indication message carries key information (such as a tunnel identifier in the uplink data packet or a destination address in the downlink data packet) of the user context acquired in the data packet.

312: the CGW finds the corresponding UE identification according to the key information in the error indication message, sends the user context information corresponding to the UE identification, including the interface address, the TEID, the UE IP address, the APN and the like, to the DGW2, and the DGW2 receives the user context information to complete the forwarding processing of the data packet. The CGW may also send all created user contexts corresponding to the IP group where the UE identifier is located to the DGW2, i.e., all user contexts corresponding to the IP group may be recovered, and the subsequent DGW2 may directly process forwarding of uplink and downlink packets of the relevant user.

In the embodiment of the present invention, the CGW may also directly issue the high priority route and the low priority route to the router. That is, the CGW may directly issue the routing information of table 1 and table 2 to the router. Thus, DGW1 and DGW2 do not have to issue routes. The CGW may not notify the DGW1 and DGW2 of the active/standby indication information described in steps 302 and 305.

In the embodiment of the invention, one CGW may control a plurality of DGWs, and each DGW can be configured with a plurality of IP groups. These DGWs may be backups of each other's IP group. For example, IP group 1 uses DGW1 as the primary, DGW2 as the backup; IP group 2 uses DGW2 as the primary and DGW1 as the backup. Multiple IP groups on one DGW may be backed up by different other DGWs. For example, DGW1 includes IP group 1, IP group 2, and IP group 3, DGW1 is the primary device of these 3 groups, and the standby devices are DGW2, DGW3, and DGW4, respectively. In short, the main and standby data plane gateways of different IP groups can be flexibly configured. While the granularity of data anchor migration is IP groups. The CGW may allocate different IP groups on different DGWs according to a load sharing algorithm. The selection of the active and standby DGWs of the IP group can be comprehensively considered by the operator according to the factors such as location and capacity.

When multiple groups of IP exist on one DGW gateway, the interface addresses of multiple IP groups are configured. For example, the IP group 1 and the IP group 2 use the DGW1 as the primary device, the IP group 3 uses the DGW1 as the backup device, and the interface addresses of the three IP groups are configured on the DGW1, and each group of interface addresses includes interface addresses such as an S1U address, an S5/S8 address, an S4 address, and an S12 address.

An embodiment of the present invention further provides a schematic structural diagram of a control plane gateway, as shown in fig. 4, including: configuration unit 401, context unit 402, and sending unit 403. Wherein:

the configuration unit is configured to configure a first data plane gateway as a primary device of an IP group, and configure a second data plane gateway as a standby device of the IP group;

the context unit is used for allocating an IP address for the user equipment from the IP group and establishing a user context;

the sending unit is configured to send user context information to the second data plane gateway, where the user context information is used for processing a user data packet after anchor migration of the second data plane gateway.

Further, these units implement the relevant functions in the above method, and are not described again.

In the present embodiment, the control plane device is presented in the form of a functional unit. An "element" may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. In a simple embodiment, those skilled in the art will appreciate that the control plane device may be implemented using a processor, memory, and a communication interface.

The control plane device in the embodiment of the present invention may also be implemented in the form of a computer device (or system) in fig. 5. Fig. 5 is a schematic diagram of a computer device according to an embodiment of the present invention. The computer device comprises at least one processor 501, a communication bus 502, a memory 503 and at least one communication interface 504, and may further comprise an IO interface 505.

Processor 501 may be a general purpose Central Processing Unit (CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the inventive arrangements.

The communication bus 502 may include a path that conveys information between the aforementioned components. The communication interface 504 may be any device, such as a transceiver, for communicating with other devices or communication Networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

The Memory 503 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 503 is used for storing application program codes for executing the present invention, and the processor 501 controls the execution. The processor 501 is configured to execute application code stored in the memory 503.

In particular implementations, processor 501 may include one or more CPUs, each of which may be a single-Core (CPU) processor or a multi-Core (multi-Core) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, the computer device may also include an input/output (I/O) interface 505, as one embodiment. For example, the output device may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device may be a mouse, a keyboard, a touch screen device or a sensing device, etc.

The computer device may be a general purpose computer device or a special purpose computer device. In a specific implementation, the computer device may be a desktop computer, a laptop computer, a web server, a Personal Digital Assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, or a device with a similar structure as in fig. 2. The embodiment of the invention does not limit the type of the computer equipment.

The control plane device as in fig. 1 may be the device shown in fig. 5, with one or more software modules stored in the memory 503. The control plane device may implement the software modules via a processor and program code in memory to perform the above-described method.

Embodiments of the present invention also provide a computer storage medium for storing computer software instructions for the apparatus shown in fig. 4 or fig. 5, which includes a program designed to execute the above method embodiments. The above method can be implemented by executing a stored program.

While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely 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, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. A computer program stored/distributed on a suitable medium supplied together with or as part of other hardware, may also take other distributed forms, such as via the Internet or other wired or wireless telecommunication systems.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the invention has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations thereof are possible. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for user data anchor migration, comprising:

the control plane gateway configures a first data plane gateway as a main device of the IP group;

configuring a second data plane gateway as a standby device of the IP group;

allocating an IP address for the user equipment from the IP group, and establishing a user context;

and sending user context information to the second data plane gateway, wherein the user context information is used for processing a user data packet after the anchor point migration of the second data plane gateway.

2. The method of claim 1, wherein the IP group comprises an interface address comprising one or more of: an S1U interface address, an S5 interface address, an S8 interface address, an S4 interface address, and an S12 interface address.

3. The method of claim 1, wherein the IP group comprises an IP address or IP address segment for assignment to a user device.

4. The method according to any one of claims 1 to 3, wherein the configuring the first data plane gateway as the active device of the IP group specifically includes: configuring the first data plane gateway as a high priority route for the IP addresses contained in the IP group;

the configuration of the second data plane gateway as the standby device of the IP group specifically includes: configuring the second data plane gateway as a low priority route for the IP addresses contained in the IP group.

5. The method of claim 4, wherein the control plane gateway directly publishes the high priority route and the low priority route.

6. The method of claim 4, wherein the control plane gateway indicates to the first data plane gateway that the first data plane gateway is the active device of the IP group, the first data plane gateway publishing a high priority route for the IP address contained in the IP group;

and the control plane gateway indicates the second data plane gateway to be the standby equipment of the IP group to the second data plane gateway, and the second data plane gateway issues the low-priority route of the IP address contained in the IP group.

7. The method of any of claims 1-3, wherein the sending of the user context information to the second data plane gateway is triggered by the second data plane gateway receiving a user equipment uplink data packet or a user equipment downlink data packet.

8. A control plane gateway is characterized by comprising a configuration unit, a context unit and a sending unit, wherein:

9. The control plane gateway of claim 8, wherein the IP group comprises an interface address comprising one or more of: an S1U interface address, an S5 interface address, an S8 interface address, an S4 interface address, and an S12 interface address.

10. The control plane gateway of claim 8, wherein the IP group comprises an IP address or IP address segment for allocation to a user device.

11. The control plane gateway of any of claims 8 to 10, wherein the configuration unit configures the first data plane gateway as a high priority route for IP addresses contained in the IP group and the second data plane gateway as a low priority route for IP addresses contained in the IP group.

12. The control plane gateway of claim 11, wherein the configuration unit directly publishes the high priority route and the low priority route.

13. The control plane gateway of claim 11, wherein the configuration unit indicates to the first data plane gateway that the first data plane gateway is the active device of the IP group, and the first data plane gateway issues a high priority route for an IP address included in the IP group;

and the configuration unit indicates the second data plane gateway to be the standby equipment of the IP group to the second data plane gateway, and the second data plane gateway issues the low-priority route of the IP address contained in the IP group.

14. The control plane gateway of any of claims 8 to 10, wherein the sending unit is triggered by the second data plane gateway receiving an uplink packet or a downlink packet of the user equipment to obtain the user context from the control plane gateway.

15. A system for user data anchor point migration, the system comprising a control plane gateway, a first data plane gateway, and a second data plane gateway, wherein:

the control plane gateway is used for configuring the first data plane gateway as a main device of an IP group and configuring the second data plane gateway as a standby device of the IP group; allocating an IP address for the user equipment from the IP group, and establishing a user context; sending user context information to the second data plane gateway;

the first data plane gateway is used for configuring an interface address in an IP group, establishing a user context and sending the user context to the data plane gateway;

and the second data plane gateway receives the user context information sent by the data plane gateway and processes the user data packet after the anchor point is migrated.

16. The system of claim 15, wherein the IP group comprises an interface address comprising one or more of: an S1U interface address, an S5 interface address, an S8 interface address, an S4 interface address, and an S12 interface address.

17. The system of claim 15, wherein the IP group comprises an IP address or IP address segment for assignment to a user device.

18. The system of any of claims 15-17, wherein the control plane network configures the first data plane gateway as a high priority route for IP addresses contained in the IP group;

configuring the second data plane gateway as a low priority route for the IP addresses contained in the IP group.

19. The system of claim 18, wherein the control plane gateway directly publishes the high priority route and the low priority route.

20. The system of claim 18, wherein the control plane gateway is configured to indicate to the first data plane gateway that the first data plane gateway is a primary device of the IP group, the first data plane gateway being configured to issue a high priority route for an IP address included in the IP group;

the control plane gateway is configured to indicate, to the second data plane gateway, that the second data plane gateway is a standby device of the IP group, and the second data plane gateway is configured to issue a low-priority route of an IP address included in the IP group.

21. The system according to any of claims 15-17, wherein the second data plane gateway is configured to trigger a request for the control plane gateway to send user context information to the second data plane gateway after receiving an uplink data packet or a downlink data packet of the user equipment.