A switching method, core network, device and medium

Abstract

The present invention discloses a handover method, a core network, a device and a medium, including: the core network receives a path handover request sent by a target base station, where the core network is a core network built in the base station, and the base station is a base station with partial core network functions; the core network obtains the IP address of the source core network; the core network determines the source core network according to the IP address of the source core network; the core network obtains the information of the user equipment from the source core network, where the user equipment is the user equipment that will be handed over from the source base station to the target base station; the core network performs bearer reconstruction of the user equipment according to the information of the user equipment. By adopting the present invention, it is possible to support the handover of the user equipment between multiple base stations, accelerate the access speed of the user equipment at the target-side base station, and improve the user experience of the user equipment.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to a handover method, a core network, a device, and a medium. Background Art

[0002] Currently, there is an independent base station that can be independently deployed, which integrates some core network functions internally and can support the normal operation of the base station without being interconnected with a dedicated EPC (Evolved Packet Core) device. Its functions are the same as those of a conventional base station.

[0003] Figure 1 As shown in the network structure diagram, the independent base station is an LTE (Long Term Evolution) base station device with a distributed control plane. The EPC function is deployed on the base station side. A single independent base station can achieve end-to-end LTE networking deployment. Currently, its main application scenario is in supporting the wirelessization of fixed broadband networks.

[0004] The disadvantage of the prior art is that due to limitations in the deployment scenario, there is a lack of functionality in supporting the mobility of mobile terminals between base stations. Summary of the Invention

[0005] The present invention provides a handover method, a CN, a device, and a medium to solve the problem that there is no mobility support for mobile terminals between independent base stations.

[0006] An embodiment of the present invention provides a handover method, including:

[0007] The CN receives a path handover request sent by a target base station. The CN is a CN built into the base station, and the base station is a base station with some core network functions.

[0008] The CN obtains the IP address of the source CN.

[0009] The CN determines the source CN according to the IP address of the source CN.

[0010] The CN obtains UE information from the source CN. The UE is a UE that will be handed over from the source base station to the target base station.

[0011] The CN performs UE bearer reconstruction according to the UE information.

[0012] In implementation, the CN obtains the IP address of the source CN from the OAM of the target base station; or from the OAM of the source base station; or from the OMC.

[0013] During implementation, the CN obtains the IP address of the source CN. After obtaining the Source GUMMEI from the path request message, it is obtained from the OAM of the target base station determined according to the Source GUMMEI; or, it is obtained from the OAM of the source base station determined according to the Source GUMMEI; or, it is obtained from the OMC determined according to the Source GUMMEI.

[0014] During implementation, after obtaining the information of the UE, it further includes:

[0015] Save the information of the UE locally;

[0016] When the UE undergoes a handover, after sending the information of the UE to the target CN, delete the information of the UE saved locally.

[0017] In an embodiment of the present invention, a CN is provided. The CN is a CN built into the base station, and the base station is a base station with partial core network functions, including:

[0018] A processor for reading a program in a memory and executing the following processes:

[0019] Receive a path handover request sent by the target base station;

[0020] Obtain the IP address of the source CN;

[0021] Determine the source CN according to the IP address of the source CN;

[0022] Obtain the information of the UE from the source CN, where the UE is the UE to be handed over from the source base station to the target base station;

[0023] Perform UE bearer reconstruction according to the information of the UE;

[0024] A transceiver for receiving and sending data under the control of the processor.

[0025] During implementation, the IP address of the source CN is obtained from the OAM of the target base station; or, it is obtained from the OAM of the source base station; or, it is obtained from the OMC.

[0026] During implementation, after obtaining the Source GUMMEI from the path request message, the IP address of the source CN is obtained from the OAM of the target base station determined according to the Source GUMMEI; or, it is obtained from the OAM of the source base station determined according to the Source GUMMEI; or, it is obtained from the OMC determined according to the Source GUMMEI.

[0027] During implementation, after obtaining the information of the UE, it further includes:

[0028] Save the information of the UE locally;

[0029] When the UE makes a handover, after sending the information of the UE to the target CN, delete the information of the UE saved locally.

[0030] An embodiment of the present invention provides a handover device, which is located in the CN. The CN is a CN built into the base station, and the base station is a base station with some core network functions, including:

[0031] A receiving module, configured to receive a path handover request sent by the target base station;

[0032] An IP acquisition module, configured to acquire the IP address of the source CN;

[0033] A determination module, configured to determine the source CN according to the IP address of the source CN;

[0034] A UE acquisition module, configured to acquire the information of the UE from the source CN, where the UE is the UE to be handed over from the source base station to the target base station;

[0035] A bearer module, configured to perform UE bearer reconstruction according to the information of the UE.

[0036] An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program for the above-mentioned handover method.

[0037] The beneficial effects of the present invention are as follows:

[0038] For the technical solution provided in the embodiment of the present invention, since the target CN acquires the IP address of the source CN, then acquires the UE information from the source CN, and performs bearer reconstruction according to this information, it can support the handover of the UE between multiple base stations, accelerate the access speed of the UE to the target-side base station, and improve the UE usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 It is a schematic diagram of the network structure in the background art;

[0041] Figure 2 It is a schematic diagram of the implementation process of the handover method on the target CN side in the embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of the handover process in Embodiment 1 of the present invention;

[0043] Figure 4Schematic diagram of the handover process according to Embodiment 2 of the present invention;

[0044] Figure 5 Schematic diagram of the handover process according to Embodiment 3 of the present invention;

[0045] Figure 6 Schematic diagram of the CN structure in the embodiments of the present invention. Detailed implementation manners

[0046] Currently, there is an independent base station that can be independently deployed, which integrates some core network functions internally and can support the normal operation of the base station without being interconnected with a dedicated EPC (Evolved Packet Core) device. Its functions are the same as those of a conventional base station;

[0047] SoftCN is a component of the so-called "partial core network functions". Soft means soft and lightweight, and CN stands for Core Network; SoftCN is a lightweight EPC component built into the independent base station, which includes all or part of the EPC components. Part of the functions of the dedicated EPC are deployed in the HaloB base station in software mode and co-located to support the independent operation of the HaloB base station.

[0048] There is at least one commercially available product on which an independent base station can be implemented, which is the HaloB base station from Beijing Bytedance Technology Co., Ltd. HaloB is a base station-type product that can be independently deployed; Halo means "halo" and takes its beautiful meaning, and B is the abbreviation of Base Station, that is, base station; however, note that although the discussions of the related inventions and the present invention are all about independent base stations, the creative concepts are applicable to other types of base stations that provide similar functions, and are also applicable to similar products other than base stations. Therefore, the reference to the HaloB base station is only for illustration and does not play a restrictive role.

[0049] In the embodiments of the present invention, the HaloB base station and SoftCN will be mainly used as examples for illustration.

[0050] Due to limitations in the deployment scenario, there is a lack of functions in supporting the mobility of mobile terminals between HaloB base stations. Based on this, in the embodiments of the present invention, a handover scheme for terminals is provided to ensure seamless handover of the UE (User Equipment) between HaloB base stations when the HaloB base station supports mobility and to ensure service continuity.

[0051] The OMC (Operation & Maintenance Center) is the remote management center for the base stations, responsible for managing the HaloB base stations and the UE devices connected to the base stations, such as IP address allocation, etc. At the same time, it includes some functions of the EPC, such as the HSS (Home Subscriber Server) to manage the user subscription information; the SoftCN is a lightweight EPC component built into the HaloB base station, including all or part of the EPC components.

[0052] The OAM (Operation Administration and Maintenance) component is the management component on the base station side, mainly responsible for storing some configuration data related to the base station. It can be understood as the agent of the OMC on each base station side. When the base station starts up, it will obtain the configuration related to the base station from the OMC, such as the GUMMEI (Globally Unique MME Identifier; MME: Mobility Management Entity) and IP (Internet Protocol) address of the SoftCN to which the base station belongs.

[0053] When there is an X2 connection between two base stations, the UE will perform an X2 handover between the two base stations.

[0054] The following will describe the specific embodiments of the present invention with reference to the accompanying drawings.

[0055] During the description process, the implementations on the source base station side, the source CN side, the target base station side, and the target CN side will be described, and the UE will be involved according to the implementation needs. Examples of their cooperation will also be given to better understand the implementation of the solution given in the embodiments of the present invention. Such a description method does not mean that they must be implemented in cooperation or must be implemented separately. In fact, when the source base station side, the source CN side, the target base station side, and the target CN side are implemented separately, they also solve their own problems on their respective sides, and when they are used in combination, better technical effects will be obtained.

[0056] Figure 2 It is a schematic diagram of the implementation process of the handover method for the target CN side. As shown in the figure, it may include:

[0057] Step 201, the CN receives a path handover request sent by the target base station. The CN is the CN built into the base station, and the base station is a base station with some core network functions;

[0058] Step 202, the CN obtains the IP address of the source CN;

[0059] Step 203: The CN determines the source CN according to the IP address of the source CN;

[0060] Step 204: The CN obtains the information of the UE from the source CN, where the UE is the UE to be handed over from the source base station to the target base station;

[0061] Step 205: The CN performs UE bearer reconstruction according to the information of the UE.

[0062] In implementation, the CN obtains the IP address of the source CN from the OAM of the target base station; or, from the OAM of the source base station; or, from the OMC.

[0063] In implementation, after obtaining the Source GUMMEI from the path request message, the CN obtains the IP address of the source CN from the OAM of the target base station determined according to the Source GUMMEI; or, from the OAM of the source base station determined according to the Source GUMMEI; or, from the OMC determined according to the Source GUMMEI.

[0064] In implementation, after obtaining the information of the UE, it further includes:

[0065] Locally save the information of the UE;

[0066] When the UE makes a handover, after sending the information of the UE to the target CN, delete the information of the UE saved locally.

[0067] Since the target CN obtains the IP address of the source CN, obtains the UE information from the source CN, and performs bearer reconstruction according to this information, it can support the UE to hand over between multiple base stations, accelerate the access speed of the UE to the target-side base station, and improve the UE usage experience.

[0068] The following is illustrated with an example.

[0069] Embodiment 1

[0070] In this example, query the IP address of the source SoftCN from the OAM of the target base station, and query the UE information from the source SoftCN.

[0071] Figure 3 For the handover process schematic diagram of Embodiment 1, as shown in the figure, it may include the following steps:

[0072] Step 300: When the base station starts up, it will obtain the correspondence between the GUMMEI and the IP address of the SoftCN of its neighboring base stations from the OMC and save it in the OAM;

[0073] Step 301: The source base station sends a handover request message to the target base station;

[0074] Step 302: The target base station makes an access control judgment based on requirements such as QoS (Quality of Service) in the handover request message to determine whether to allow access;

[0075] Step 303: If access is allowed, a reply message is sent to the source base station;

[0076] Step 304: The source base station starts to initiate data synchronization to the target base station;

[0077] Step 305: After receiving the data synchronization message, the target base station stores the data locally;

[0078] Step 306: The target base station sends a path handover request to the target SoftCN, carrying the Source GUMMEI (Source GUMMEI) and Source MME UE S1AP ID (Source MME UE S1 interface application protocol identifier; AP: Application Protocol, Application Protocol);

[0079] Step 307: The target SoftCN obtains the Source GUMMEI and Source MME UE S1AP ID from the path request message;

[0080] Step 308: The target SoftCN queries the IP address of the source SoftCN from the OAM of the target base station according to the Source GUMMEI;

[0081] Step 309: The OAM of the target base station returns the IP address of the source SoftCN;

[0082] Step 310: The target SoftCN sends a UE query message to the source SoftCN, carrying the Source MME UE S1AP ID;

[0083] Step 311: The source SoftCN returns the queried UE information to the target SoftCN;

[0084] Step 312: After successfully sending the message, the source SoftCN deletes the local UE information;

[0085] Step 313: After receiving the UE information, the target SoftCN saves it locally and performs UE bearer reconstruction;

[0086] Step 314: The target SoftCN sends a location update message to the OMC (HSS), notifying the OMC (HSS) of the newly attached MME of the UE for information update;

[0087] Step 315: OMC (HSS) sends a location update message reply;

[0088] Step 316: The destination SoftCN sends a path switch request reply to the destination eNB;

[0089] Step 317: The destination eNB sends a UE deletion message to the source eNB;

[0090] Step 318: The source eNB locally deletes the UE information.

[0091] Embodiment 2

[0092] In this example, query the IP address of the source SoftCN from the source base station OAM and query the UE information from the source SoftCN.

[0093] Figure 4 The schematic diagram of the handover process for Embodiment 2 is shown in the figure and may include the following steps:

[0094] Step 400: When the base station starts up, it will obtain the corresponding relationship between the GUMMEI and IP address of the SoftCN of its neighboring base stations from the OMC and save it in the OAM;

[0095] Step 401: The source base station sends a handover request message to the destination base station;

[0096] Step 402: The destination base station performs access control based on requirements such as QoS in the handover request message to determine whether to allow access;

[0097] Step 403: If access is allowed, a reply message is sent to the source base station;

[0098] Step 404: The source base station starts to initiate data synchronization to the destination base station;

[0099] Step 405: After receiving the data synchronization message, the destination base station locally stores the data;

[0100] Step 406: The destination base station sends a path switch request to the destination SoftCN, carrying the Source GUMMEI and Source MME UE S1AP ID;

[0101] Step 407: The destination SoftCN obtains the Source GUMMEI and Source MME UE S1AP ID from the path request message;

[0102] Step 408: The destination SoftCN queries the IP address of the source SoftCN from the OAM of the source base station according to the Source GUMMEI;

[0103] Step 409: The source base station OAM returns the IP address of the source SoftCN;

[0104] Step 410: The destination SoftCN sends a UE query message to the source SoftCN, carrying the Source MME UE S1AP ID;

[0105] Step 411: The source SoftCN returns the queried UE information to the destination SoftCN;

[0106] Step 412: After successfully sending the message, the source SoftCN deletes the local UE information;

[0107] Step 413: After receiving the UE information, the destination SoftCN saves it locally and performs UE bearer reconstruction;

[0108] Step 414: The destination SoftCN sends a location update message to the OMC (HSS), notifying the OMC (HSS) of the newly attached MME of the UE for information update;

[0109] Step 415: The OMC (HSS) sends a location update message reply;

[0110] Step 416: The destination SoftCN sends a path switch request reply to the destination eNB;

[0111] Step 417: The destination eNB sends a UE deletion message to the source eNB;

[0112] Step 418: The source eNB locally deletes the UE information.

[0113] Example 3

[0114] In this example, query the IP address of the source SoftCN from the OMC, and then query the UE information from the source SoftCN.

[0115] Figure 5 The schematic diagram of the handover process for Example 3 is shown in the figure and may include the following steps:

[0116] Step 501: The source base station sends a handover request message to the destination base station;

[0117] Step 502: The destination base station makes an access control judgment based on requirements such as QoS in the handover request message to determine whether to allow access;

[0118] Step 503: If access is allowed, a reply message is sent to the source base station;

[0119] Step 504: The source base station starts to initiate data synchronization to the destination base station;

[0120] Step 505: After receiving the data synchronization message, the destination base station stores the data locally;

[0121] Step 506: The target base station sends a path switching request to the target SoftCN, carrying the Source GUMMEI and Source MME UE S1AP ID;

[0122] Step 507: The target SoftCN queries the IP address of the source SoftCN from the OMC according to the Source GUMMEI;

[0123] Step 508: The OMC queries the IP address of the source SoftCN internally according to the Source GUMMEI;

[0124] Step 509: The OMC returns the IP address of the source SoftCN;

[0125] Step 510: The target SoftCN locally stores the correspondence between the GUMMEI and the IP address for convenient local query during the next handover, without the need to query the OMC again;

[0126] Step 511: The target SoftCN sends a UE query message to the source SoftCN, carrying the Source MME UE S1AP ID;

[0127] Step 512: The source SoftCN returns the queried UE information to the target SoftCN;

[0128] Step 513: The source SoftCN deletes the local UE information after successfully sending the message;

[0129] Step 514: After receiving the UE information, the target SoftCN saves it locally and performs UE bearer reconstruction;

[0130] Step 515: The target SoftCN sends a location update message to the OMC (HSS), notifying the OMC (HSS) of the newly attached MME of the UE for information update;

[0131] Step 516: The OMC (HSS) sends a location update message reply;

[0132] Step 517: The target SoftCN sends a path switching request reply to the target eNB;

[0133] Step 518: The target eNB sends a UE deletion message to the source eNB;

[0134] Step 519: The source eNB locally deletes the UE information.

[0135] Based on the same inventive concept, the embodiments of the present invention also provide a CN, a handover device, and a computer-readable storage medium. Since the principles of these devices for solving problems are similar to those of the handover method, the implementation of these devices can refer to the implementation of the method, and the repeated parts will not be elaborated here.

[0136] When implementing the technical solution provided by the embodiments of the present invention, it can be implemented in the following manner.

[0137] Figure 6 The following is a schematic diagram of the CN structure. The CN is a CN built into the base station, and the base station is a base station with some core network functions. As shown in the figure, the CN includes:

[0138] A processor 600, configured to read a program in a memory 620 and execute the following processes:

[0139] Receive a path handover request sent by a target base station;

[0140] Obtain the IP address of the source CN;

[0141] Determine the source CN according to the IP address of the source CN;

[0142] Obtain information of a UE from the source CN, where the UE is a UE to be handed over from a source base station to a target base station;

[0143] Perform UE bearer reconstruction according to the UE information;

[0144] A transceiver 610, configured to receive and send data under the control of the processor 600.

[0145] In implementation, the IP address of the source CN is obtained from the OAM of the target base station; or, it is obtained from the OAM of the source base station; or, it is obtained from the OMC.

[0146] In implementation, after obtaining the Source GUMMEI from the path request message to obtain the IP address of the source CN, it is obtained from the OAM of the target base station determined according to the Source GUMMEI; or, it is obtained from the OAM of the source base station determined according to the Source GUMMEI; or, it is obtained from the OMC determined according to the Source GUMMEI.

[0147] In implementation, after obtaining the UE information, it further includes:

[0148] Locally save the UE information;

[0149] When the UE undergoes handover, after sending the UE information to the target CN, delete the UE information locally saved.

[0150] Among them, in Figure 6Among them, the bus architecture may include any number of interconnected buses and bridges, specifically various circuits represented by one or more processors represented by processor 600 and a memory represented by memory 620 are linked together. The bus architecture can also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and thus will not be further described herein. The bus interface provides an interface. The transceiver 610 can be multiple components, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 when performing operations.

[0151] An embodiment of the present invention provides a handover device. The device is located in the CN, and the CN is a CN built into the base station. The base station is a base station with some core network functions, including:

[0152] A receiving module, configured to receive a path handover request sent by the target base station;

[0153] An IP acquisition module, configured to acquire the IP address of the source CN;

[0154] A determination module, configured to determine the source CN according to the IP address of the source CN;

[0155] A UE acquisition module, configured to acquire information of the UE from the source CN, where the UE is a UE to be handed over from the source base station to the target base station;

[0156] A bearer module, configured to perform UE bearer reconstruction according to the information of the UE.

[0157] Specifically, reference may be made to the implementation of the handover method on the target CN side.

[0158] For the convenience of description, each part of the above-described device is described separately as various modules or units according to functions. Of course, when implementing the present invention, the functions of the various modules or units can be implemented in the same or multiple software or hardware.

[0159] An embodiment of the present invention provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program of the above data transmission method.

[0160] Specifically, reference may be made to the implementation of the handover method on the target CN side.

[0161] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory and optical memory, etc.) that contain computer-usable program code.

[0162] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0163] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0164] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0165] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A switching method, characterized in that, Including: The destination core network CN receives a path switching request sent by a destination base station. The destination CN is a CN built into the destination base station, and the destination base station is a base station with partial core network functions. Among them, the path switching request carries a source GUMMEI and a source mobility management entity MME UE S1 interface application protocol identifier. The destination CN obtains the IP address of the source CN. The destination CN determines the source CN according to the IP address of the source CN. The destination CN obtains information of a user equipment UE from the source CN. The UE is the UE that will be switched from the source base station to the destination base station. The destination CN performs UE bearer reconstruction according to the information of the UE.

2. The method according to claim 1, characterized in that, The destination CN obtains the IP address of the source CN from the operation, administration, and maintenance OAM of the destination base station; or from the OAM of the source base station; or from the OMC.

3. The method according to claim 2, wherein The destination CN obtains the IP address of the source CN after obtaining the source globally unique mobility management entity identifier Source GUMMEI from the path request message, and then obtains it from the OAM of the destination base station determined according to the Source GUMMEI; or from the OAM of the source base station determined according to the Source GUMMEI; or from the OMC determined according to the Source GUMMEI.

4. The method according to any one of claims 1 to 3, characterized in that After obtaining the information of the UE, it further includes: Locally save the information of the UE. When the UE undergoes a handover, after sending the information of the UE to the destination CN, delete the locally saved information of the UE.

5. A CN, characterized in that, The CN is the destination CN built into the destination base station, and the destination base station is a base station with partial core network functions, including: A processor for reading a program in a memory and executing the following processes: Receiving a path switching request sent by a destination base station. The path switching request carries a source GUMMEI and a source mobility management entity MME UE S1 interface application protocol identifier. Obtaining the IP address of the source CN. Determining the source CN according to the IP address of the source CN. Obtaining information of a UE from the source CN. The UE is the UE that will be switched from the source base station to the destination base station. Performing UE bearer reconstruction according to the information of the UE. A transceiver for receiving and sending data under the control of the processor.

6. The CN according to claim 5, characterized in that, The IP address of the source CN is obtained from the OAM of the destination base station; or from the OAM of the source base station; or from the OMC.

7. The CN according to claim 6, characterized in that, The IP address of the source CN is obtained after obtaining the Source GUMMEI from the path request message, and then obtained from the OAM of the destination base station determined according to the Source GUMMEI; or from the OAM of the source base station determined according to the Source GUMMEI; or from the OMC determined according to the Source GUMMEI.

8. The CN according to any one of claims 5 to 7, characterized in that, After obtaining the information of the UE, it further includes: Locally save the information of the UE. When the UE undergoes a handover, after sending the information of the UE to the destination CN, delete the locally saved information of the UE.

9. A switching device, characterized in that, The device is located in the CN, which is the destination CN built in the destination base station. The destination base station is a base station with some core network functions, including: A receiving module, configured to receive a path switching request sent by the destination base station, where the path switching request carries a source GUMMEI and a source mobility management entity MME UE S1 interface application protocol identifier; An IP obtaining module, configured to obtain the IP address of the source CN; A determining module, configured to determine the source CN according to the IP address of the source CN; A UE obtaining module, configured to obtain UE information from the source CN, where the UE is the UE to be switched from the source base station to the destination base station; A bearer module, configured to perform UE bearer reconstruction according to the UE information.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program for executing the method according to any one of claims 1 to 4.

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