CN114867070B

CN114867070B - Distributed network switching method and device

Info

Publication number: CN114867070B
Application number: CN202210271772.3A
Authority: CN
Inventors: 李娜
Original assignee: Baicells Technologies Co Ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2023-09-15
Anticipated expiration: 2042-03-18
Also published as: CN114867070A

Abstract

The present invention relates to the field of communications technologies, and in particular, to a distributed network switching method. When the first network equipment receives a switching request message of the first User Equipment (UE), if the first network equipment is a session anchor point of the first UE, a first address group is created, the first request message is sent to the second network equipment, after receiving a response message of the first request message sent by the second network equipment, communication data sent to the first UE is cached, and a switching command message is sent to the first UE, so that the first UE is connected to the second network equipment, and then the cached communication data is sent to the second network equipment, so that the second network equipment sends the communication data to the first UE. By the network switching method, when the first UE in communication performs network equipment switching, the condition of communication interruption is avoided, and user experience is improved.

Description

Distributed network switching method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a distributed network switching method and device.

Background

The mobile communication network is composed of base station and core network, the network equipment is a communication equipment for localizing the core network capability and the base station capability, the equipment provides necessary core network capability such as attachment, signaling transmission and control of user equipment besides the functions of the base station, and the network equipment is equivalent to an independent network and has independent session anchor points.

Because the base station and the core network are all deployed on the same network equipment, the base station on each network equipment interacts with the network node on the equipment by default, and provides connection service for the user equipment. When a User Equipment (UE) moves from one network device to another, which is equivalent to performing network switching between networks provided by different network providers, a session anchor switching occurs, that is, the current service network connection needs to be interrupted, and the UE reconnects to another network device. If the session anchor point is switched, the user equipment and the network equipment are in communication, the communication is interrupted, and the normal use of the user is affected.

Disclosure of Invention

The embodiment of the invention provides a distributed network switching method, when user equipment is required to be switched from first network equipment to second network equipment, if first UE is communicating with the first network equipment, the first network equipment firstly caches communication data, then triggers the first UE to establish connection with the second network equipment, then forwards the cached communication data to the second network equipment, and then sends the second network equipment to the first UE, so that communication interruption is avoided.

The embodiment of the invention provides a distributed network switching method, which is applied to first network equipment and comprises the following steps:

receiving a switching request message of first User Equipment (UE), wherein the switching request message contains equipment information of second network equipment;

if the first network device is a session anchor point of the first UE, creating a first address group, where the first address group includes a UE address of the first UE, an anchor point address, and a first network address of the first network device;

transmitting a first request message to the second network device, the first request message containing the first address group;

receiving a first response message sent by the second network device, wherein the first response message comprises a second address group, and the second address group comprises a second network device address;

caching communication data sent to the first UE and sending a switching command message to the first UE so that the first UE is connected to the second network equipment;

and sending the cached and subsequently received communication data to the second network equipment so that the second network equipment sends the communication data to the first UE.

In one implementation, sending the buffered and subsequently received communication data to the second network device to cause the second network device to send the communication data to the first UE includes:

as a session anchor point of the first UE, setting a target address of a first downlink data packet related to the first UE as the UE address;

encapsulating the first downlink data packet into a second downlink data packet, wherein a target address of the second downlink data packet is set as the second network device address, and a source address of the second downlink data packet is set as the first network device address;

and sending the second downlink data packet to the second network device, so that the second network device sends the second downlink data packet to the first UE.

In one implementation, the method further comprises:

receiving a second uplink data packet sent by the second network device and related to the first UE, where a source address of the second uplink data packet is the second network device address, and a target address is the first network device address;

analyzing a first uplink data packet from the second uplink data packet, wherein the source address of the first uplink data packet is the UE address or the anchor address;

If the source address of the first uplink data packet is the UE address, setting the source address of the first uplink data packet as the anchor point address;

and sending the first uplink data packet as a session anchor point of the first UE.

In one implementation, the method further comprises:

and deleting a first anchor point identifier corresponding to the first UE, the first address group and the second address group when the anchor point update message sent by the second network equipment is received, wherein the anchor point update message contains the first UE identifier.

In one implementation, the method further comprises:

if the first network device is not the session anchor point of the first UE, acquiring a third address group stored before, wherein the third address group comprises the UE address, the anchor point address and a third network device address;

and sending a second request message to the second network device, wherein the second request message comprises the third address group.

In one implementation, the method further comprises:

receiving the second response message sent by the second network device, wherein the second response message comprises a fourth address group or a first indication, and the fourth address group comprises the address of the second network device; the first indication is to indicate that the second network device is a session anchor for the first UE.

In one implementation, the second response message includes a fourth address set including the second network device address, the method further comprising:

if the fourth address group further includes the UE address and the anchor address, sending the fourth address group to the third network device, and triggering the third network device to cache communication data sent to the first UE;

if the fourth address group does not contain the UE address and the anchor address, a fifth address group is constructed, wherein the fifth address group contains the UE address, the anchor address and the second network equipment address; and sending the fifth address group to the third network equipment, and triggering the third network equipment to buffer communication data sent to the first UE.

In one implementation, the second response message includes a first indication, the method further comprising:

and deleting the third address group.

In one implementation, the method further comprises:

and sending a control signal to the third network device, and triggering the third network device to send the cached and subsequently received communication data to the second network device, so that the second network device forwards the communication data to the first UE.

In one implementation, the method further comprises:

and sending a control signal to the second network equipment, and triggering the second network equipment to send the cached and subsequently received communication data to the first UE.

In a second aspect, an embodiment of the present invention further provides a distributed network switching method, where the method is applied to a second network device, and includes:

receiving a first request message sent by first network equipment, wherein the first request message comprises a first address group, and the first address group comprises a UE address of first UE, an anchor point address and a first network equipment address;

determining a second address set, the second address set comprising a second network device address;

transmitting a first response message to the first network device to enable the first network device to buffer communication data transmitted to the first UE, wherein the first response message contains the second address group;

receiving a connection request message of the first UE and establishing network connection with the first UE;

sending a first completion message to the first network device, so that the first network device sends the buffered and subsequently received communication data to the second network device;

And receiving the communication data and sending the communication data to the first UE.

In one implementation, receiving the communication data and transmitting the communication data to the first UE includes:

receiving a second downlink data packet sent by the first network device, wherein the target address of the second downlink data packet is the address of the second network device;

analyzing a first downlink data packet from the second downlink data packet, wherein the target address of the first downlink data packet is the UE address;

and sending the first downlink data packet to the first UE.

In one implementation, the method further comprises:

receiving a first uplink data packet sent by the first UE, wherein the source address of the first uplink data packet is the UE address; or setting the source address of the first uplink data packet as the anchor point address;

encapsulating the first uplink data packet into a second uplink data packet, wherein a target address of the second uplink data packet is set as the first network device address, and a source address of the second uplink data packet is set as the second network device address;

and sending the second uplink data packet to the first network device.

In one implementation, the method further comprises:

starting timing when the transmission of the communication data to the first UE is stopped;

if the timing time exceeds a first threshold value, creating a second anchor point identifier corresponding to the first UE and sending an anchor point switching message to the first network equipment, wherein the anchor point switching message contains the first UE identifier.

In one implementation, the method further comprises:

and receiving a second request message sent by the first network device, wherein the second request message comprises a third address group, and the third address group comprises the UE address, the anchor point address and a third network device address.

In one implementation, the method further comprises:

determining a fourth address set, the fourth address set comprising the second network device address;

and sending a second response message to the first network device, wherein the second response message comprises the fourth address group, so that the first network device sends the fourth address group to the third network device and triggers the third network device to buffer the communication data.

In one implementation, the method further comprises:

and caching the communication data and sending a second response message to the first network device, wherein the second response message comprises a first instruction so that the first network device deletes the third address group.

In one implementation, the method further comprises:

and sending a second completion message to the first network device, so that the first network device triggers the third network device to send the cached and subsequently received communication data to the second network device.

In one implementation, the method further comprises:

and sending the cached and subsequently received communication data to the first UE.

In one implementation, the method further comprises:

if the timing time exceeds a second threshold, creating the second anchor point identification and sending the anchor point switching message to the third network equipment.

In a third aspect, an embodiment of the present invention further provides a distributed network switching apparatus, where the apparatus is disposed in a first network device, and the first network device includes: the system comprises a first processing module, a first transmission module and a first base station module, wherein:

the first processing module is configured to receive, through the first base station module, a handover request message of a first user equipment UE, where the handover request message includes device information of a second network device;

the first processing module is further configured to create a first address group if the first network device is a session anchor of the first UE, where the first address group includes a UE address of the first UE, an anchor address, and a first network device address;

The first processing module is further configured to send a first request message to the second network device, where the first request message includes the first address group;

the first processing module is further configured to receive a first response message sent by the second network device, where the first response message includes a second address group, and the second address group includes a second network device address;

the first processing module is further configured to control the first transmission module to buffer communication data sent to the first UE, and send a handover command message to the first UE through the first base station module, so that the first UE switches network connection to the second network device;

the first transmission module is further configured to send the buffered and subsequently received communication data to the second network device, so that the second network device forwards the communication data to the first UE.

In a fourth aspect, an embodiment of the present invention further provides a distributed network switching apparatus, where the apparatus is disposed in a second network device, where the second network device includes: the system comprises a second processing module, a second transmission module and a second base station module, wherein:

The second processing module is configured to receive a first request message sent by a first network device, where the first request message includes a first address group, and the first address group includes a UE address of a first UE, an anchor address, and a first network device address;

the second processing module is further configured to determine a second address group, where the second address group includes a second network device address;

the second processing module is further configured to send a first response message to the first network device, so that the first network device caches communication data sent to the first UE, where the first response message includes the second address group;

the second base station module is configured to receive a connection request message of the first UE and establish network connection with the first UE;

the second processing module is further configured to send a first completion message to the first network device, so that the first network device sends the buffered and subsequently received communication data to the second network device;

the second transmission module is configured to receive the communication data and send the communication data to the first UE.

In a fifth aspect, an embodiment of the present invention further provides an electronic device, including:

At least one processor; and

at least one memory communicatively coupled to the processor, wherein:

the memory stores program instructions executable by the processor, the processor invoking the program instructions to enable the method provided in the first aspect or the second aspect to be performed.

In a sixth aspect, an embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer instructions that cause the computer to perform the method provided in the first aspect or the second aspect.

In the embodiment of the invention, when the first network equipment receives the switching request message of the first User Equipment (UE), if the first network equipment is a session anchor point of the first UE, a first address group is created, the first request message is sent to the second network equipment, after receiving the response message of the first request message sent by the second network equipment, the communication data sent to the first UE is cached, and the switching command message is sent to the first UE, so that the first UE is connected to the second network equipment, and then the cached communication data is sent to the second network equipment, so that the second network equipment sends the communication data to the first UE. By the network switching method, when the first UE in communication performs network equipment switching, the condition of communication interruption is avoided, and user experience is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a distributed network switching method according to an embodiment of the present invention;

fig. 2 is a flowchart of another distributed network switching method according to an embodiment of the present invention;

fig. 3 (a) is a schematic diagram of a distributed network switching method according to an embodiment of the present invention;

fig. 3 (B) is a schematic diagram of another distributed network switching method according to an embodiment of the present invention;

fig. 4 is a flowchart of another distributed network switching method according to an embodiment of the present invention;

fig. 5 (a) is a schematic diagram of another distributed network switching method according to an embodiment of the present invention;

fig. 5 (B) is a schematic diagram of another distributed network switching method according to an embodiment of the present invention;

fig. 6 is a flowchart of another distributed network switching method according to an embodiment of the present invention;

Fig. 7 is a flowchart of another distributed network switching method according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a distributed network switching device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another distributed network switching device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

For a better understanding of the technical solutions of the present specification, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.

It should be understood that the described embodiments are only some, but not all, of the embodiments of the present description. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present disclosure.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Fig. 1 is a flowchart of a distributed network switching method according to an embodiment of the present invention. The method may be applied to a first network device, as shown in fig. 1, and may include:

step 101, a handover request message of a first user equipment UE is received, where the handover request message includes device information of a second network device.

When the first UE moves from the coverage area of the first network device to the coverage area of the second network device, a handover request message is sent to the first network device, where the message includes device information of the second network device, and the first network device may send a message to the second network device according to the device information.

In step 102, if the first network device is a session anchor of the first UE, a first address group is created, where the first address group includes a UE address of the first UE, an anchor address, and a first network device address.

When the first UE performs data communication, communication data of an upper network is transmitted to the network equipment with the session anchor point, and then the network equipment sends the communication data to the UE. The first network device may receive the communication data sent by the upper network according to the anchor address, and then send the communication data to the first UE according to the UE address, where the network device address may be used for data transmission between different network devices.

Step 103, a first request message is sent to the second network device, the first request message comprising a first address group.

The first address set is sent to the second network device so that the second network device can communicate data with the first network device and the first UE through the first address set.

Step 104, receiving a first response message sent by the second network device, where the first response message includes a second address group, and the second address group includes an address of the second network device.

The second network device receives the first address group, performs preparation before the first UE is handed over, and sends a first response message to the first network device. Because the second address group has the address of the second network device, the first network device can send communication data to the second network device after acquiring the second network address.

Step 105, caching communication data sent to the first UE, and sending a handover command message to the first UE, so that the first UE is connected to the second network device.

The first network equipment caches communication data sent to the first UE by the upper network, sends a switching command to the first UE, and disconnects the first UE from the first network equipment and establishes connection with the second network equipment after the first UE receives the switching command.

And step 106, the cached and subsequently received communication data is sent to the second network device, so that the second network device sends the communication data to the first UE.

In some embodiments, the first network device receives the first completion message sent by the second network device, and after receiving the first completion message, the first network device sends the buffered communication data to the second network device, and then the second network device sends the communication data to the first UE. Since the first network device is still the session anchor point of the first UE at this time, the communication data sent by the subsequent upper layer network is also sent to the first network device first, the first network device sends the communication data to the second network device, and the second network device sends the communication data to the first UE.

In some embodiments, as shown in fig. 3 (B), a specific method for a first network device to transmit communication data to a second network device may include: the first network device serves as a session anchor point of the first UE, receives a first downlink data packet 310 sent by an upper layer and related to the first UE, and sets a target address of the first downlink data packet 310 as a UE address; then, the first network device encapsulates the first downlink data packet 310 into a second downlink data packet 320, the destination address of the second downlink data packet 320 is set as the second network device address, and the source address of the second downlink data packet 320 is set as the first network device address; finally, the first network device sends the second downstream data packet 320 to the second network device. Since the destination address of the second downlink data packet 320 is the address of the second network device, the second downlink data packet 320 is sent to the second network device, and the second network device receives the second downlink data packet 320 and parses the first downlink data packet 310 therefrom, and since the destination address of the first downlink data packet 310 is the address of the UE, the first downlink data packet 310 is finally sent to the first UE, so that the communication data transmission is not interrupted.

Meanwhile, the first network device may also send the communication data sent by the first UE to the upper layer network, and the specific method may include: the first network device receives a second uplink data packet 340 sent by the second network device and related to the first UE, where a source address of the second uplink data packet 340 is a second network device address, and a target address is a first network device address; then, the first network device parses the first uplink data packet 330 from the second uplink data packet 340, where the source address of the first uplink data packet 330 is a UE address or an anchor address, and if the source address of the first uplink data packet 330 is a UE address, the source address of the first uplink data packet 330 is set as the anchor address; finally, the first network device sends a first uplink data packet 330 as a session anchor for the first UE.

In some embodiments, when the upper network stops sending communication data to the first UE and the stopping time exceeds a certain threshold, the first network device receives an anchor point switching request of the second network device and performs anchor point switching. The specific method can comprise the following steps: when an anchor point update message sent by second network equipment is received, deleting a first anchor point identifier corresponding to the first UE and a first address combination second address group, wherein the anchor point update message contains the first UE identifier, and the first network equipment can determine the first anchor point identifier according to the first UE identifier. Whether the network device is a session anchor of the UE can be determined according to whether there is an anchor identifier corresponding to the UE, so that the first network device needs to delete the first anchor identifier corresponding to the first UE, and the second network device can establish the anchor identifier corresponding to the first UE. After the second network equipment becomes a session anchor point of the first UE information, the communication data of the upper network can be directly sent to the second network equipment, and the second network equipment sends the communication data to the first UE.

The first UE completes the switching from the first network equipment to the second network equipment, and the communication service of the first UE is not interrupted because the first network equipment caches the communication data before the switching of the first UE and sends the communication data to the second network equipment after the switching of the first UE, so that the normal communication of the user is ensured.

Fig. 2 is a flowchart of another distributed network switching method according to an embodiment of the present invention. The method may be applied to a second network device, as shown in fig. 2, and may include:

step 201, a first request message sent by a first network device is received, where the first request message includes a first address group, and the first address group includes a UE address of a first UE, an anchor address, and a first network device address.

Step 202, determining a second address set, the second address set comprising a second network device address.

Step 203, a first response message is sent to the first network device, so that the first network device caches the communication data sent to the first UE, and the first response message includes the second address group.

The second network device receives the first request message and determines a first address group therefrom, then performs related preparation before network switching and sends a first response message to the first network device to realize transmission of communication data between the first network device and the second network device.

Step 204, a connection request message of the first UE is received and a network connection is established with the first UE.

Step 205, a first completion message is sent to the first network device, so that the first network device sends the buffered and subsequently received communication data to the second network device.

And after the second network equipment is successfully connected with the first UE, a first completion message is sent to the first network equipment, and the first network equipment is triggered to send the cached and subsequently received communication data to the second network equipment.

In step 206, the communication data is received and sent to the first UE.

The second network device receives the communication data sent by the first network device and sends the communication data to the first UE, wherein the communication data comprises the communication data cached by the first network device before the first UE is switched and the communication data continuously received by the first network device from an upper network after the first UE is switched.

In some embodiments, a specific method for the second network device to send communication data to the first UE may include: and the second network equipment receives a second downlink data packet sent by the first network equipment, the target address of the second downlink data packet is the address of the second network equipment, then the first downlink data packet is analyzed from the second downlink data packet, the target address of the first downlink data packet is the address of the UE, and finally the first downlink data packet is sent to the first UE.

Meanwhile, the second network device may also send the communication data sent by the first UE to the first network device, and the specific method may include: and receiving a first uplink data packet sent by the first UE, wherein the source address of the first uplink data packet is a UE address, and the second network device may set the source address of the first uplink data packet as an anchor address, then encapsulate the first uplink data packet into a second uplink data packet, set the destination address of the second uplink data packet as a first network device address, set the source address of the second uplink data packet as a second network device address, and finally send the second uplink data packet to the first network device. If the second network device does not set the source address of the first upstream data packet as the anchor address, the first network device sets the source address of the first upstream data packet as the anchor address before sending the first upstream data packet.

In some embodiments, the second network device stops receiving the communication data sent by the first network device and performs the session anchor switching after a certain time, and the specific method may include: and when the second network equipment stops sending communication data to the first UE, starting timing, if the timing time exceeds a first threshold value, creating a second anchor point identifier corresponding to the first UE and sending an anchor point switching message to the first network equipment, wherein the anchor point switching message comprises the first UE identifier.

Fig. 3 (a) is a schematic diagram of a distributed network switching method according to an embodiment of the present invention. As shown in fig. 3 (a), the first network device may include: the first processing module 31, the first transmission module 32, and the first base station module 33, the second network device may include: a second processing module 34, a second transmission module 35 and a second base station module 36.

Before the first UE37 switches, the communication data of the upper network is sent to the first transmission module 32, the first transmission module 32 sends the communication data to the first base station module 33, and the first base station module 33 sends the communication data to the first UE37. After the first UE switches, the communication data of the upper network is still sent to the first transmission module 32, the first transmission module 32 sends the communication data to the second transmission module 35, the second transmission module 35 sends the communication data to the second base station module 36, and the second base station module 36 sends the communication data to the first UE37. After the first UE37 stops data communication with the upper layer network, the second network device may create a new anchor identifier, and the first network device deletes the anchor identifier, and then the communication data of the upper layer network may be directly sent to the second processing device 35.

Fig. 4 is a flowchart of another distributed network switching method according to an embodiment of the present invention. Based on fig. 4, the message interaction during the handover of the first UE from the first network device to the second network device is further described. As shown in fig. 4, may include:

401. The first UE41 transmits a handover request to the first base station module 42.

402. The first base station module 42 sends a handover request to the first processing module 43.

403. A first address group is created and if the first network device is a session anchor for the first UE41, the first processing module 42 creates the first address group.

404. The first request message is sent and the first processing module 43 sends the first request message to the second processing module 46, which message contains the first address group.

405. A second address set is created and the second processing module 46 creates the second address set.

406. The second address set is sent, and the second processing module 46 sends the second address set to the second transmitting module 47, and the second transmitting module 47 stores the second address set for data transmission with the first transmitting module 44.

407. The second processing module 46 sends a handover message to the second base station module 45, triggering the second base station module 45 to complete the preparation before the connection with the first UE 41.

408. Reply message, the second base station module 45 sends a reply message to the second processing module 46 to indicate that the preparation has been completed.

409. The second processing module 46 sends a first response message to the first processing module 43, which message contains the second address set.

410. The second address set is sent and the first processing module 43 sends the second address set to the first transmission module 44.

411. The first transfer module 44 receives and stores the second address set while buffering the communication data.

412. The first processing module 43 sends a handover command to the first base station module 42.

413. Handover command, the first base station module 42 sends the handover command to the first UE.

414. After transmitting the handover confirmation, the first UE41 disconnects from the first base station module 42 and transmits the handover confirmation to the second base station module 45.

415. The second base station module 45 sends a handover notification to the second processing module 46 after establishing a connection with the first UE.

416. The first completion message is sent and the second processing module 46 sends the first completion message to the first processing module 43.

417. The first acknowledgement message is sent and the first processing module 43 sends the first acknowledgement message to the second processing module 46.

418. The first processing module 43 triggers the first transmission module 44 to send the buffered communication data to the second transmission module 47, and before the session anchor point is switched, the first transmission module 44 continuously receives the communication data sent by the upper network 48 and sends the communication data received subsequently to the first UE41.

419. The release command, the first processing module 43 triggers the first base station module 42 to release the first UE-related information.

420. After the release is completed, the first base station module 42 sends a reply message after completing the release of the context information of the first UE 41.

Solid arrows in fig. 4 represent message interactions between the respective modules, and broken lines represent transmission of communication data. The path of the downlink communication data is the upper network 48, the first transmission module 44, the second transmission module 47 and the first UE41 in sequence, and the path of the uplink communication data is the first UE41, the second transmission module 47, the first transmission module 44 and the upper network 48 in sequence.

When the second processing module 46 detects that the first UE41 and the upper network 48 stop data transmission and the stop time exceeds the first threshold, the session anchor point is switched, the first processing module 43 deletes the anchor point identifier corresponding to the first UE41 in the first network device, and the second processing module 46 creates the anchor point identifier corresponding to the first UE.

Through the above message interaction and the transmission of the communication data, the first UE41 can be switched from the first network device to the second network device while the communication between the first UE41 and the upper network 48 is not interrupted, so that various effects caused by communication interruption are avoided, and user experience is improved.

When the first UE performs continuous handover between the plurality of network devices, the path of data transmission may be as shown in fig. 5 (a). The first UE510 is initially connected to a third network device, and the downlink communication data is routed through the upper network, the third transmission module 52, the third base station module 52, and the first UE510 in that order. Then, the first UE510 is switched from the third network device to the first network device, and the paths of the downlink communication data are the upper layer network, the third transmission module 52, the first transmission module 55, the first base station module 56, and the first UE510 in sequence. If the first UE510 is again handed over from the first network device to the second network device before the session anchor point is handed over to the first network device, the path of the downlink communication data is in turn the upper network, the third transmission module 52, the second transmission module 58, the second base station module 59, and the first UE510.

In the above case, before the anchor point is switched, the third network device, as a session anchor point of the first UE, continuously receives the communication data sent by the upper layer network, and then sends the communication data to the second network device, and then the second network device sends the communication data to the first UE. The specific method for the third network device to send communication data to the second network device is shown in fig. 5 (B), and may include: the third network device serves as a session anchor point of the first UE, receives a third downlink data packet 521 sent by an upper layer with respect to the first UE, and sets a target address of the third downlink data packet 521 as a UE address; the third network device encapsulates the third downstream packet 521 into a fourth downstream packet 522, where the destination address of the fourth downstream packet 522 is set to the second network device address, and the source address of the fourth downstream packet 522 is set to the third network device address; finally, the third network device sends a fourth downstream packet 522 to the second network device. Since the destination address of the fourth downstream data packet 522 is the address of the second network device, the fourth downstream data packet 522 is sent to the second network device, and the second network device receives the fourth downstream data packet 522 and parses the third downstream data packet 521 therefrom, and since the destination address of the third downstream data packet 521 is the address of the UE, the third downstream data packet 521 is finally sent to the first UE, so that the communication data transmission is not interrupted.

Meanwhile, the third network device may also send the communication data sent by the first UE to the upper layer network, and the specific method may include: the third network device receives a fourth uplink data packet 524 sent by the second network device and related to the first UE, where a source address of the fourth uplink data packet 524 is a second network device address and a destination address is a third network device address; then, the third network device parses the third uplink data packet 523 from the fourth uplink data packet 524, where the source address of the third uplink data packet 523 is a UE address or an anchor address, and if the source address of the third uplink data packet 523 is the UE address, the source address of the third uplink data packet 523 is set as the anchor address; finally, the third network device sends a third uplink data packet 523 as a session anchor for the first UE.

Fig. 6 is a flowchart of another distributed network switching method according to an embodiment of the present invention. The message interactions during handover of the first UE between the plurality of network devices are further described based on fig. 6. As shown in fig. 6, may include:

601. the first base station module 65 sends a handover request to the first processing module 66.

602. The first processing module 66 determines that the first network device does not have an anchor identifier corresponding to the first UE, and thus obtains a previously stored third address set comprising the UE address, the anchor address, and the third network device address.

603. The second request message is sent and the first processing module 66 sends the second request message to the second processing module 69, which message contains the third address set.

604. A fourth address set is created and the second processing module 69 generates a fourth address set containing the second network device address.

606. The second processing module 69 sends a handoff message to the second base station module 68.

607. Reply message the second base station module 68 sends a reply message to the second processing module 69 after completion of the handover preparation.

608. The second processing module 69 sends a second response message to the first processing module 66, the message containing the fourth address set.

609. Transmitting a fourth address group, and if the fourth address group further includes the UE address and the anchor address, the first processing module 66 transmits the fourth address group to the third processing module 63; if the fourth address set does not include the UE address and the anchor address, the first processing module 66 constructs a fifth address set including the UE address, the anchor address, and the second network device address, and sends the fifth address set to the third processing module 63.

610. The third processing module 63 sends the fourth address set to the third transmission module 64 and triggers the third transmission module 64 to buffer the communication data.

611. The communication data is buffered and the third transmission module 64 buffers the communication data.

612. The first processing module 66 sends a handover command to the first base station module 65.

613. The first base station module 65 transmits a handover command to the first UE61.

614. The first UE61 disconnects from the first base station module 65 and transmits a handover confirm message to the second base station module 68.

615. The second base station module 68 establishes a connection with the first UE61 and sends a handover notification to the second processing module.

616. The second completion message is sent and the second processing module 69 sends the second completion message to the first processing module 66.

617. The second acknowledgement message is sent and the first processing module 66 sends the second acknowledgement message to the second processing module 69.

618. The second processing module 69 sends the forward data command to the third processing module 63.

619. The third processing module 63 forwards the data command and sends this command to the third transmission module 64.

620. The third transmission module 64 transmits the buffered communication data to the second transmission module 630, so that the second transmission module 630 transmits the communication data to the first UE61. The third transmission module 64 continuously receives the communication data sent by the upper layer network and sends it to the second transmission module 630 before the anchor point is switched.

621. The release command, the first processing module 66 sends the release command to the first base station module 65.

622. The release is completed, and since the first network device is not a session anchor point of the first UE61, the first base station module 65 may delete all relevant information of the first UE, and after the deletion is completed, send a release completion message to the first processing module 66.

When the communication data stops being transmitted, the switching of the session anchor point is similar to the method flowchart of fig. 1, if the first UE does not perform the switching of the network device again, the second processing module 69 creates the anchor point identifier corresponding to the first UE61, and sends an instruction to the third processing module 64, so that the third processing module 64 deletes the anchor point identifier corresponding to the first UE61 in the third network device.

By the method, communication interruption can be avoided when the first UE is switched among a plurality of network devices, and the stability of communication is improved.

Fig. 7 is a flowchart of another distributed network switching method according to an embodiment of the present invention. If the first UE switches back to the network device with the anchor identifier corresponding to the first UE in the switching process between the plurality of network devices, the message interaction may be as shown in fig. 7, and may include:

701. the first UE71 transmits a handover request to the first base station module 72.

702. The first base station module 72 sends a handover request to the first processing module 73.

703. The third address set is obtained, and the first processing module 72 determines that the first network device is not a session anchor for the first UE71, and obtains the previously stored third address set.

704. The first processing module 73 sends a second request message to the second processing module 76, which message contains the third address group.

705. The second processing module 76 sends a handover message to the second base station module 75.

706. A reply message is sent by the second base station module 75 to the second processing module 76 to indicate that the handover preparation has been completed.

707. The first indication is sent, and the second processing module 76 may determine that the second network device is a session anchor for the first UE71 according to the information contained in the third address set, and then send the first indication to the first processing module 73.

708. The second transmission module 77 buffers the communication data.

709. The third address group is deleted, and since the second network device is a session anchor point of the first UE71, after the first UE71 establishes a network connection with the second network device, the communication data may be directly sent to the first UE71 by the second network device without forwarding between the network devices, so that the third address group may be directly deleted.

710. The first processing module 73 sends a handover command to the first base station module 72.

711. The first base station module 72 transmits a handover command to the first UE71.

712. After transmitting the handover confirmation, the first UE71 disconnects from the first base station module 72 and transmits the handover confirmation to the second base station module 75.

713. The second base station module 75, after establishing a connection with the first UE71, sends a handover notification to the second processing module 76.

714. The second completion message is sent and the second processing module 76 sends the second completion message to the first processing module 73.

715. The second acknowledgement message is sent and the first processing module 73 sends the second acknowledgement message to the second processing module 76.

716. Forwarding the communication data, the second transmission module 77 sends the buffered and subsequently received communication data to the first UE71.

717. The release command, the first processing module 73 triggers the first base station module 72 to release the first UE-related information.

718. After the release is completed, the first base station module 72 sends a reply message after completing the release of the first UE context information.

In fig. 7, the second network device is originally a session anchor point of the first UE71, and then the first UE71 performs a handover of the network device, in which the first UE71 is handed back to the second network device again in a plurality of handovers, and after the handover is completed, the second network device receives the communication data of the upper network 78 and directly sends the communication data to the first UE71.

Fig. 8 is a schematic structural diagram of a distributed network switching device according to an embodiment of the present invention. As shown in fig. 7, may include: a first processing module 81, a first transmission module 82 and a first base station module 83.

The first processing module 81 is configured to receive, through the first base station module 83, a handover request message of the first user equipment UE, where the handover request message includes device information of the second network device.

The first processing module 81 is further configured to create a first address group if the first network device is a session anchor of the first UE, where the first address group includes a UE address of the first UE, an anchor address, and a first network device address.

The first processing module 81 is further configured to send a first request message to the second network device, where the first request message includes the first address group.

The first processing module 81 is further configured to receive a first response message sent by the second network device, where the first response message includes a second address group, and the second address group includes an address of the second network device.

The first processing module 81 is further configured to control the first transmission module 82 to buffer communication data sent to the first UE, and send a handover command message to the first UE through the first base station module 83, so that the first UE switches network connection to the second network device.

The first transmission module 82 is further configured to send the buffered communication data to the second network device, so that the second network device forwards the communication data to the first UE.

Fig. 9 is a schematic structural diagram of another distributed network switching device according to an embodiment of the present invention. As shown in fig. 9, may include: a second processing module 91, a second transmission module 92 and a second base station module 93.

The second processing module 91 is configured to receive a first request message sent by a first network device, where the first request message includes a first address group, and the first address group includes a UE address of a first UE, an anchor address, and a first network device address.

The second processing module 91 is further configured to determine a second address set, where the second address set includes a second network device address.

The second processing module 91 is further configured to send a first response message to the first network device, so that the first network device caches the communication data sent to the first UE, where the first response message includes the second address set.

The second base station module 93 is configured to receive the connection request message of the first UE and establish a network connection with the first UE.

The second processing module is further 91, configured to send a first completion message to the first network device, so that the first network device sends the buffered communication data to the second network device.

The second transmission module 92 is configured to receive the communication data and send the communication data to the first UE.

For specific procedures, reference may be made to the description in the flow of the method described above.

Fig. 10 shows a block diagram of an exemplary electronic device suitable for use in implementing embodiments of the invention. The electronic device shown in fig. 10 is merely an example, and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

As shown in fig. 10, the electronic device is in the form of a general purpose computing device. Components of an electronic device may include, but are not limited to: one or more processors 1010, a memory 1030, and a communication bus 1040 that connects the various system components (including the memory 1030 and the processing unit 1010).

Communication bus 1040 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include industry Standard architecture (Industry Standard Architecture; hereinafter ISA) bus, micro channel architecture (Micro Channel Architecture; hereinafter MAC) bus, enhanced ISA bus, video electronics standards Association (Video Electronics Standards Association; hereinafter VESA) local bus, and peripheral component interconnect (Peripheral Component Interconnection; hereinafter PCI) bus.

Electronic devices typically include a variety of computer system readable media. Such media can be any available media that can be accessed by the electronic device and includes both volatile and nonvolatile media, removable and non-removable media.

Memory 1030 may include computer system readable media in the form of volatile memory such as random access memory (Random Access Memory; hereinafter: RAM) and/or cache memory. The electronic device may further include other removable/non-removable, volatile/nonvolatile computer system storage media. Although not shown in fig. 10, a magnetic disk drive for reading from and writing to a removable nonvolatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable nonvolatile optical disk (e.g., a compact disk read only memory (Compact Disc Read Only Memory; hereinafter CD-ROM), digital versatile read only optical disk (Digital Video Disc Read Only Memory; hereinafter DVD-ROM), or other optical media) may be provided. In such cases, each drive may be coupled to communication bus 1040 by one or more data medium interfaces. Memory 1030 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of embodiments of the invention.

A program/utility having a set (at least one) of program modules may be stored in the memory 1030, such program modules include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules typically carry out the functions and/or methods of the embodiments described herein.

The electronic device may also communicate with one or more external devices, with one or more devices that enable a user to interact with the electronic device, and/or with any devices (e.g., network cards, modems, etc.) that enable the electronic device to communicate with one or more other computing devices. Such communication may occur through communication interface 1020. Moreover, the electronic device may also communicate with one or more networks (e.g., local area network (Local Area Network; hereinafter: LAN), wide area network (Wide Area Network; hereinafter: WAN) and/or a public network, such as the Internet) via a network adapter (not shown in FIG. 10) that may communicate with other modules of the electronic device via the communication bus 1040. It should be appreciated that although not shown in fig. 10, other hardware and/or software modules may be used in connection with an electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, disk arrays (Redundant Arrays of Independent Drives; hereinafter RAID) systems, tape drives, data backup storage systems, and the like.

The processor 1010 executes various functional applications and data processing by running a program stored in the memory 1030, for example, to implement the vehicle battery control method provided by the embodiment of the present invention.

The embodiment of the invention also provides a computer readable storage medium, which stores computer instructions for causing the computer to execute the vehicle battery control method provided by the embodiment of the invention.

Any combination of one or more computer readable media may be utilized as the above-described computer readable storage media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory; EPROM) or flash Memory, an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

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

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims

1. A distributed network switching method, wherein the method is applied to a first network device, and comprises:

if the first network device is a session anchor point of the first UE, a first address group is created, wherein the first address group comprises a UE address of the first UE, an anchor point address and a first network device address;

transmitting the buffered and subsequently received communication data to the second network device, such that the second network device transmits the communication data to the first UE;

the sending the buffered and subsequently received communication data to the second network device, so that the second network device sends the communication data to the first UE, includes:

2. The method according to claim 1, wherein the method further comprises:

3. The method as recited in claim 1, further comprising:

4. The method according to claim 1, wherein the method further comprises:

5. The method according to claim 4, wherein the method further comprises:

receiving a second response message sent by the second network device, wherein the second response message comprises a fourth address group or a first indication, and the fourth address group comprises the address of the second network device; the first indication is to indicate that the second network device is a session anchor for the first UE.

6. The method of claim 5, wherein the second response message contains a fourth address set containing the second network device address, the method further comprising:

7. The method of claim 5, wherein the second response message contains a first indication, the method further comprising:

and deleting the third address group.

8. The method as recited in claim 6, further comprising:

9. The method as recited in claim 7, further comprising:

10. A distributed network switching method, wherein the method is applied to a second network device, and comprises:

receiving the communication data and transmitting the communication data to the first UE;

the receiving the communication data and transmitting the communication data to the first UE includes:

and sending the first downlink data packet to the first UE.

11. The method according to claim 10, wherein the method further comprises:

and sending the second uplink data packet to the first network device.

12. The method as recited in claim 10, further comprising:

13. The method as recited in claim 10, further comprising:

14. The method as recited in claim 13, further comprising:

15. The method as recited in claim 13, further comprising:

16. The method as recited in claim 14, further comprising:

17. The method as recited in claim 15, further comprising:

18. The method as recited in claim 16, further comprising:

If the timing time exceeds a second threshold, a second anchor point identification is created and the anchor point switching message is sent to the third network equipment.

19. A distributed network switching apparatus, wherein the apparatus is deployed on a first network device, the first network device comprising: the system comprises a first processing module, a first transmission module and a first base station module, wherein:

the first transmission module is further configured to send buffered and subsequently received communication data to the second network device, so that the second network device forwards the communication data to the first UE;

the first transmission module is specifically configured to set, as a session anchor point of the first UE, a target address of a first downlink data packet related to the first UE as the UE address;

20. A distributed network switching apparatus, wherein the apparatus is deployed on a second network device, the second network device comprising: the system comprises a second processing module, a second transmission module and a second base station module, wherein:

the second transmission module is configured to receive the communication data and send the communication data to the first UE;

the second transmission module is specifically configured to receive a second downlink data packet sent by the first network device, where a target address of the second downlink data packet is the address of the second network device;

and sending the first downlink data packet to the first UE.

21. An electronic device, comprising:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1-18.

22. A computer readable storage medium storing computer instructions that cause the computer to perform the method of any one of claims 1 to 18.