CN114401507B - Data transmission method, device and storage medium - Google Patents

Abstract

The present invention provides a data transmission method, device and storage medium, which relate to the field of communication technology and are used to solve the problem in the prior art that a target base station after terminal switching cannot be obtained. Applied to a data transmission device, the data transmission device is respectively connected to multiple base stations, core network equipment and service servers. The method includes: in the case of obtaining the first service data sent by the service server to the terminal, when the serving base station of the terminal is switched from the initial base station among the multiple base stations to the target base station among the multiple base stations, the service data from the core network equipment can be obtained instruction message. Wherein, the instruction message includes the identifier of the target base station. Then, the first service data is sent to the terminal through the target base station. This application can accurately guide business data, ensuring the continuity of data transmission.

Description

A data transmission method, device and storage medium

technical field

The present application relates to the technical field of communications, and in particular to a data transmission method, device and storage medium.

Background technique

With the development of 5th generation mobile communication technology (5G) network technology, the needs of vertical industries are more diverse (for example, the local data of the enterprise park does not leave the park, and the 5G network needs to provide large bandwidth and low time extended communication link).

In the existing technical solution, a distribution device is deployed between the base station and the network device, which can realize the distribution transmission of service data to the user plane function (UPF) of the public network or the service server of the local network during the data transmission process. However, during the service data transmission process of the local network, when the serving base station of the terminal (user equipment, UE) is switched (for example, the location of the terminal moves), the offloading device cannot obtain the target base station after the terminal is switched, and thus cannot accurately analyze the downlink data. The flow is directed.

Contents of the invention

The present application provides a data transmission method, device and storage medium, which are used to solve the problem in the prior art that the target base station after terminal switching cannot be obtained.

In order to achieve the above object, the application adopts the following technical solutions:

In the first aspect, a data transmission method is provided, which is applied to a data transmission device, and the data transmission device is respectively connected to multiple base stations, core network equipment and service servers. The method includes: firstly, acquiring the first service data sent by the service server to the terminal. When the serving base station of the terminal is switched from the initial base station among the multiple base stations to the target base station among the multiple base stations, the indication message from the core network equipment is acquired. Wherein, the instruction message includes the identifier of the target base station. Then, the first service data is sent to the terminal through the target base station.

Optionally, when the serving base station of the terminal is switched from the initial base station to the target base station, the method for obtaining the indication message from the core network device specifically includes: when the serving base station of the terminal is switched from the initial base station to the target base station, obtaining the The service message; the service message is used to transmit the second service data to the terminal through the target base station; the service message includes the identification of the target base station; the service message is determined as an indication message.

Optionally, the method further includes: when the serving base station of the terminal is switched from the initial base station to the target base station, acquiring a termination message sent by the core network equipment for instructing the terminal to disconnect the communication connection with the initial base station; When determining the corresponding relationship between the terminal and the initial base station, the corresponding relationship between the terminal and the initial base station is deleted in response to the termination message.

Optionally, after acquiring the indication message from the core network device, the method further includes: updating the corresponding relationship between the terminal and the target base station.

Optionally, the core network device is a user plane network element UPF of the public network; the service server is a server in a local network that provides local services.

In a second aspect, a data transmission device is provided, the data transmission device is respectively connected to multiple base stations, core network equipment, and service servers; the data transmission device includes: an acquisition unit and a sending unit; the acquisition unit is used to acquire the information sent by the service server to the terminal The first service data; the obtaining unit is also used to obtain an indication message from the core network equipment when the serving base station of the terminal is switched from the initial base station to the target base station; the indication message includes the identity of the target base station; the initial base station and the target base station are multiple Any two base stations in the base stations; a sending unit, configured to send the first service data obtained by the obtaining unit to the terminal through the target base station based on the indication message obtained by the obtaining unit.

Optionally, the acquisition unit is specifically used to: acquire a service message sent by the core network device when the serving base station of the terminal is switched from the initial base station to the target base station; the service message is used to transmit the second service data to the terminal through the target base station; the service The message includes the identification of the target base station; the service message is determined as the indication message.

Optionally, the obtaining unit is also used to: when the serving base station of the terminal is switched from the initial base station to the target base station, obtain a termination message sent by the core network equipment for instructing the terminal to disconnect the communication connection with the initial base station; the data transmission device, It also includes: a processing unit; the processing unit is configured to delete the corresponding relationship between the terminal and the initial base station in response to the termination message when the data transmission device stores the corresponding relationship between the terminal and the initial base station.

Optionally, the processing unit is further configured to: update the corresponding relationship between the terminal and the target base station.

Optionally, the core network device is a user plane network element UPF of the public network; the service server is a server in a local network that provides local services.

In a third aspect, a data transmission device is provided, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor and the memory are connected through a bus; when the data transmission device is running, the processor executes the computer-executable instructions stored in the memory, so that the data transmission device executes the data transmission method described in the first aspect.

The data transmission device may be a network device, and may also be a part of the network device, such as a chip system in the network device. The chip system is used to support the network device to implement the functions involved in the first aspect and any possible implementation thereof, for example, acquire, determine, and send the data and/or information involved in the above data transmission method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a fourth aspect, a computer-readable storage medium is provided. The computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute the data transmission method described in the first aspect.

According to a fifth aspect, a computer program product is also provided, the computer program product includes computer instructions, and when the computer instructions are run on the data transmission device, the data transmission device executes the data transmission method as described in the first aspect above.

It should be noted that all or part of the above computer instructions may be stored on the first computer-readable storage medium. Wherein, the first computer-readable storage medium may be packaged together with the processor of the data transmission device, or may be packaged separately with the processor of the data transmission device, which is not limited in this embodiment of the present application.

For the description of the second aspect, the third aspect, the fourth aspect and the fifth aspect in this application, you can refer to the detailed description of the first aspect; and, the beneficial effects of the second aspect, the third aspect, the fourth aspect and the fifth aspect , you can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

In the embodiment of the present application, the names of the above-mentioned data transmission devices do not limit the devices or functional modules themselves, and in actual implementation, these devices or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of the present application, they fall within the scope of the claims of the present application and their equivalent technologies.

These or other aspects of the present application will be more clearly understood in the following description.

The technical solution provided by the application brings at least the following beneficial effects:

Based on any of the above aspects, the present application proposes a data transmission method, which is applied to a data transmission device, and the data transmission device is respectively connected to multiple base stations, core network equipment and service servers. In the case of obtaining the first service data sent by the service server to the terminal, when the serving base station of the terminal is switched from the initial base station among the multiple base stations to the target base station among the multiple base stations, an indication message from the core network equipment may be obtained. Wherein, the instruction message includes the identifier of the target base station. Then, the first service data is sent to the terminal through the target base station.

In this way, when the serving base station of the terminal changes, the identity of the target base station after the serving base station of the terminal has changed can be obtained from the indication message from the core network equipment, and the first service data is sent to the terminal through the target base station, thereby accurately The business data is guided to ensure the continuity of data transmission.

Description of drawings

FIG. 1 is a schematic structural diagram of a data transmission system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a data transmission device provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a hardware structure of a data transmission device provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of another hardware structure of the data transmission device provided by the embodiment of the present application;

FIG. 5 is a schematic flow diagram of a data transmission method provided by an embodiment of the present application;

FIG. 6 is a schematic flowchart of another data transmission method provided by the embodiment of the present application;

FIG. 7 is a schematic flowchart of another data transmission method provided by the embodiment of the present application;

FIG. 8 is a schematic flowchart of another data transmission method provided by the embodiment of the present application;

FIG. 9 is a schematic structural diagram of another data transmission device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. Personnel can understand that words such as "first" and "second" are not limiting the quantity and execution order.

As described in the background technology, in the existing data transmission method, during the service data transmission process of the local network, when the serving base station of the terminal is switched, the distribution device cannot obtain the target base station after the terminal is switched, and thus cannot accurately perform downlink data flow. guide.

In view of the above problems, an embodiment of the present application provides a data transmission method, which is applied to a data transmission device, and the data transmission device is respectively connected to multiple base stations, core network equipment, and service servers. In the case of obtaining the first service data sent by the service server to the terminal, when the serving base station of the terminal is switched from the initial base station among the multiple base stations to the target base station among the multiple base stations, an indication message from the core network equipment may be obtained. Wherein, the instruction message includes the identifier of the target base station. Then, the first service data is sent to the terminal through the target base station.

In this way, when the serving base station of the terminal changes, the identity of the target base station after the serving base station of the terminal has changed can be obtained from the indication message from the core network equipment, and the first service data is sent to the terminal through the target base station, thereby accurately The business data is guided to ensure the continuity of data transmission.

The data transmission method is suitable for a data transmission system. Figure 1 shows a structure of the data transmission system. As shown in FIG. 1 , the data transmission system includes: a terminal 101 , multiple base stations (including a base station 102 and a base station 103 ), core network equipment 104 , a service server 105 and a data transmission device 106 .

Terminal 101 in FIG. 1 may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (radio access network, RAN). Wireless terminals can be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals, and can also be portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which are connected to wireless terminals. Access to the network to exchange language and/or data, for example, cell phones, tablets, laptops, netbooks, personal digital assistants (PDAs).

The base station in Fig. 1 can be the global system for mobile communication (GSM), the base station (basetransceiver station, BTS) in code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access) The base station (node B) in multiple access (WCDMA), the base station (eNB) in the Internet of things (IoT) or the narrowband Internet of things (narrowband-internet of things, NB-IoT), the future 5G mobile communication network or The base station in the future evolving public land mobile network (public land mobile network, PLMN), the embodiment of the present application does not impose any limitation on this.

In practical applications, since the coverage area of the base station is fixed, when the location of the terminal changes, the serving base station of the terminal may change.

Exemplarily, when the terminal moves from the coverage of the base station 102 to the coverage of the base station 103 , the serving base station of the terminal is switched from the base station 102 to the base station 103 . In this case, base station 102 is the initial base station, and base station 103 is the target base station.

The core network device 104 in FIG. 1 may be a user plane function (UPF) of the public network, or a device including a UPF deployed on the public network, and is used to establish a communication connection between a terminal and a public network device.

Among them, the public network is the Internet (Internet), which is a collection of computer networks formed by interconnecting computer networks (including local area networks, metropolitan area networks, and wide area networks) in different locations and sizes around the world.

The service server 105 in FIG. 1 is a server in the local network that provides local services, and is used to transmit service data of the local services to the terminal. The service server 105 may include a local database or a remote database (remote database).

Wherein, the local network refers to a network that can cover a certain area, such as a network covering enterprise parks, cafes, hotels, campuses, airports and other places. The local network can be a home network, a private network, a wired network, a wireless network, or a combination of a wired network and a wireless network.

Optionally, the core network device 104 and the service server 105 may be a server in a server cluster (composed of multiple servers), or a chip in the server, or a system-on-a-chip in the server, or through A virtual machine (virtual machine, VM) deployed on a physical machine is implemented, which is not limited in this embodiment of the present application.

In FIG. 1 , the data transmission device 106 communicates with multiple base stations, the core network equipment 104 and the service server 105 respectively, and is used to guide the data flow. The data transmission device 106 includes identifiers of multiple base stations.

As shown in Figure 2, the data transmission device 106 includes a rule configuration module 201 (for configuring the distribution rules of the data flow), a data parsing and matching module 202 (for analyzing the business data, according to the distribution rules configured by the rule configuration module 201 , to determine the destination address of the service data), the data processing module 203 (used to store the corresponding relationship between the terminal and the base station, and to decapsulate the service data according to the distribution rule configured by the rule configuration module 201 ).

Optionally, when the terminal 101 transmits service data to the core network device 104 or the service server 105, the data transmission device 106 may call the data parsing and matching module 202 to analyze the service data, and determine the service data according to the distribution rule configured by the rule configuration module 201 The destination address of the data.

When the data parsing and matching module 202 determines that the destination address is the core network device 104 , the data transmission device 106 transparently transmits (pass-through) the service data to the core network device 104 .

When the data parsing and matching module 202 determines that the destination address is the service server 105 , the data transmission device 106 calls the data processing module 203 to repackage the service data, and sends the repackaged service data to the service server 105 .

Optionally, the data transmission device 106 may be a device independently configured with multiple base stations, or may be a functional module in any one of the multiple base stations.

When the data transmission device 106 and multiple base stations are set independently of each other, the data transmission device 106 may be a gateway server, a router or other devices including all functional modules in FIG. 2 .

It is easy to understand that when the data transmission device 106 is a functional module in any of the multiple base stations, the communication method between the data transmission device 106 and any of the multiple base stations is internal to any of the multiple base stations. Communication between modules. In this case, the communication flow between the two is the same as "the communication flow between the two when the data transmission device 106 and multiple base stations are independent of each other".

For ease of understanding, the present application mainly uses the example in which the data transmission device 106 and multiple base stations are set independently of each other for description.

The basic hardware structures of the terminal 101, base station 102, base station 103, core network equipment 104, service server 105 and data transmission device 106 in the data transmission system are similar, and all include elements included in the communication device shown in FIG. 3 or FIG. 4 . The hardware structure of the terminal 101, the base station 102, the base station 103, the core network equipment 104, the service server 105 and the data transmission device 106 is introduced below by taking the communication device shown in FIG. 3 and FIG. 4 as an example.

As shown in FIG. 3 , it is a schematic diagram of a hardware structure of a communication device provided in an embodiment of the present application. The communication device includes a processor 21 , a memory 22 , a communication interface 23 and a bus 24 . The processor 21 , the memory 22 and the communication interface 23 may be connected through a bus 24 .

The processor 21 is the control center of the communication device, and may be one processor, or a general term for multiple processing elements. For example, the processor 21 may be a general-purpose central processing unit (central processing unit, CPU), or other general-purpose processors. Wherein, the general-purpose processor may be a microprocessor or any conventional processor.

As an embodiment, the processor 21 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 3 .

Memory 22 may be read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) or other types that can store information and instructions The dynamic storage device can also be an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a magnetic disk storage medium or other magnetic storage devices, or can be used to carry or store instructions or data structures desired program code and any other medium that can be accessed by a computer, but not limited thereto.

In a possible implementation manner, the memory 22 may exist independently of the processor 21, and the memory 22 may be connected to the processor 21 through the bus 24 for storing instructions or program codes. When the processor 21 invokes and executes the instructions or program codes stored in the memory 22, the data transmission method provided by the following embodiments of the present invention can be realized.

In the embodiment of the present application, for the terminal 101, the base station 102, the base station 103, the core network equipment 104, the service server 105 and the data transmission device 106, the software programs stored in the memory 22 are different, so the terminal 101, the base station 102, the base station 103 , the core network device 104 , the service server 105 and the data transmission device 106 implement different functions. The functions performed by each device will be described in conjunction with the flow chart below.

In another possible implementation manner, the memory 22 may also be integrated with the processor 21 .

The communication interface 23 is used for connecting the communication device with other devices through a communication network, and the communication network may be Ethernet, wireless access network, wireless local area network (wireless local area networks, WLAN) and the like. The communication interface 23 may include a receiving unit for receiving data, and a sending unit for sending data.

The bus 24 may be an industry standard architecture (industry standard architecture, ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 2 , but it does not mean that there is only one bus or one type of bus.

Fig. 4 shows another hardware structure of the communication device in the embodiment of the present invention. As shown in FIG. 4 , the communication device may include a processor 31 and a communication interface 32 . Processor 31 is coupled with communication interface 32 .

For functions of the processor 31, reference may be made to the description of the processor 21 above. In addition, the processor 31 also has a storage function and can function as the above-mentioned memory 22 .

The communication interface 32 is used to provide data to the processor 31 . The communication interface 32 may be an internal interface of the communication device, or an external interface of the communication device (corresponding to the communication interface 23 ).

It should be pointed out that the structure shown in Figure 3 (or Figure 4) does not constitute a limitation on the communication device, except for the components shown in Figure 3 (or Figure 4), the communication device may include more than shown in the figure or fewer components, or combining certain components, or a different arrangement of components.

The data transmission method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 5 , the data transmission method provided by the embodiment of the present application is applied to a data transmission device, and the data transmission device is respectively connected to multiple base stations, core network equipment, and service servers. The data transmission method includes: S501-S503.

S501. The data transmission device acquires first service data sent by the service server to the terminal.

Optionally, the first service data may be text data, image data, audio data, or mixed data including multiple data types.

Optionally, the service server may be a server in a local network that provides local services.

Optionally, when transmitting data between the terminal and the service server, the terminal may send a service request message to the service server through the data transmission device. Correspondingly, after receiving the service request message, the service server may send the first service data to the terminal through the data transmission device in response to the service request message. In this case, the data transmission device may obtain the first service data sent by the service server to the terminal.

When the data transmission device sends the service request message of the terminal to the service server, it can determine that the destination address of the service request message is the service server by analyzing the service request message from the terminal. Subsequently, the data transmission device performs data processing on the service request message, and sends the processed service request message to the service server.

As another option, the service server may also periodically send the first service data to the terminal through the data transmission device. In this case, the data transmission device may also obtain the first service data sent by the service server to the terminal.

S502. When the serving base station of the terminal is switched from the initial base station to the target base station, the data transmission device acquires an indication message from the core network equipment.

Specifically, when the serving base station of the terminal is switched from the initial base station to the target base station, the target base station can send a registration message to the core network device to request to establish a communication connection with the terminal, so that the core network device can obtain the identity of the target base station according to the registration message . Then, the core network equipment may send an indication message including the identity of the target base station to the data transmission device, so that the data transmission device obtains the identity of the target base station in the indication message, and sends the first service message to the terminal through the target base station.

Optionally, the identifier of the target base station may be an E-UTRAN cell global identifier of an evolution universal-mobile-telecommunications-system terrestrial radioaccess network (evolution universal-mobile-telecommunications-system terrestrial radioaccess network, E-UTRAN) , ECGI), cell identity (CID), location area code (location area code, LAC), base station identifier (enode B identity, eNB ID), global base station identifier (global e node B identifier, Global eNBID )wait.

Optionally, the core network device may be a public network UPF.

Optionally, the data transmission device may obtain the indication message from the core network device through the following two methods.

The first method: the data transmission device periodically sends a request message for requesting to obtain the identity of the target base station to the core network equipment. In response to the request message, the core network device sends an indication message including the identity of the target base station to the data transmission device.

The second method: the core network equipment sends the service message to the terminal through the data transmission device. When the service message includes the identity of the target base station, the data transmission device determines the above service message as the indication message.

Optionally, referring to FIG. 2 , the method for the data transmission device to acquire the target base station identifier in the indication message includes: the data transmission device may call the data parsing and matching module 202 to parse the indication message, so as to acquire the target base station identifier in the indication message.

S503. Based on the indication message, the data transmission device sends the first service data to the terminal through the target base station.

Optionally, after acquiring the first service data and the identifier of the target base station, the data transmission device may send the repackaged first service data to the target base station. Then, the target base station sends the repackaged first service data to the terminal.

Exemplarily, the first service data requested by the preset terminal from the service server is a plurality of image frames of a certain video. The data transmission device acquires multiple image frames sent by the service server to the terminal. After the serving base station of the terminal is switched from base station 1 to base station 2, the data transmission device receives the message sent by the UPF (including the ECGI "4CF1E0D" of the serving base station of the terminal), and determines that the serving base station after the terminal switching is the one corresponding to "4CF1E0D". base station 2. Then, the data transmission device repackages the multiple image frames, and sends the repackaged multiple image frames to the base station 2 . Subsequently, the base station 2 sends the multiple repackaged image frames to the terminal.

In one embodiment, referring to FIG. 5, as shown in FIG. 6, when the serving base station of the terminal is switched from the initial base station to the target base station in S502, the method for the data transmission device to obtain an indication message from the core network device specifically includes: S601 -S602.

S601. When the serving base station of the terminal is switched from an initial base station to a target base station, the data transmission device acquires a service message sent by a core network device.

Wherein, the service message is used to transmit the second service data to the terminal through the target base station. The service message includes the identity of the target base station.

Specifically, when the serving base station of the terminal is switched from the initial base station to the target base station, the target base station can send a registration message to the core network device to request to establish a communication connection with the terminal, so that the core network device can obtain the identity of the target base station according to the registration message . In response to the above registration message, the core network device may send a registration success message to the target base station for indicating establishment of a communication connection with the terminal. Then, the core network device may send the service message including the second service data to the terminal through the target base station.

Optionally, the second service data is service data of public network services. The public network service may be a voice service (voice over Wi-Fi, VoWiFi) based on a wireless network communication technology (wireless fidelity, WiFi), an internet protocol television (internet protocol television, IPTV) service, a data service, a smart home service, and the like.

S602. The data transmission device determines the service message as an indication message.

Optionally, referring to FIG. 2 , after the data transmission device acquires the service message, it may invoke the data parsing and matching module 202 to analyze the service message. When the service message includes the identity of the target base station, the data transmission device can obtain the identity of the target base station from the path sequence of the service message, so that the first service data is sent to the terminal through the target base station, therefore, the data transmission device can send the service message Determined as an instruction message.

Exemplarily, after the serving base station of the terminal is switched from base station 1 to base station 2, the data transmission device receives the VoWiFi service message sent by the UPF. The data transmission device parses and finds that the path sequence of the VoWiFi service message includes the ECGI "4CF1E0D" of the terminal's serving base station. Therefore, the data transmission device determines the VoWiFi service message as an indication message. .

In an embodiment, as shown in FIG. 7 , the data transmission method further includes: S701.

S701. When the serving base station of the terminal is switched from the initial base station to the target base station, the data transmission device acquires a termination message sent by the core network equipment for instructing the terminal to disconnect the communication connection with the initial base station.

Specifically, when the serving base station of the terminal is switched from the initial base station to the target base station, the target base station may send a registration message for requesting to establish a communication connection with the terminal to the core network device. In response to the above registration message, the core network device may send to the target base station a registration success message for indicating the establishment of a communication connection with the terminal, and at the same time send a termination message for instructing the terminal to disconnect the communication connection with the initial base station to the initial base station, so that the data The transmission device stops sending service messages to the terminal through the initial base station.

Optionally, the termination message may include an end marker (end marker) data packet.

Exemplarily, according to the handover procedure of the 3rd generation partnership project (3rd generation partnership project, 3GPP) protocol, when the serving base station of the terminal is handed over from base station 1 to base station 2, base station 2 may send a request to the UPF to establish an Registration message for a communication connection. After the registration is successful, the UPF sends an endmarker data packet to the base station 1 through the N3 interface, instructing the terminal to disconnect the communication connection with the base station 1.

S702. When the data transmission device stores the correspondence between the terminal and the initial base station, the data transmission device deletes the correspondence between the terminal and the initial base station in response to the termination message.

Optionally, when the terminal establishes a communication connection with the initial base station among the multiple base stations, the data transmission device may obtain the identifier of the initial base station from an indication message from the core network equipment, and establish and store the corresponding relationship between the terminal and the initial base station.

Optionally, referring to FIG. 2 , the data transmission device calls the data processing module 203 to store the correspondence between the terminal and the initial base station.

Exemplarily, the preset data transmission device stores the corresponding relationship between the terminal and the base station 1 . After the data transmission device obtains the end marker data packet sent by the UPF to the base station 1 through the N3 interface, the corresponding relationship between the terminal and the base station 1 is deleted.

In one embodiment, referring to FIG. 5, as shown in FIG. 8, after S502, the data transmission method further includes: S801.

S801. The data transmission device updates the corresponding relationship between the terminal and the target base station.

Optionally, when a plurality of base stations including the initial base station and the target base station are connected in communication with the data transmission device, that is, the data transmission device stores the corresponding relationship between the terminal and the initial base station, and obtains the indication message, and acquires the target base station from the indication message After the identification of the base station, the data transmission device replaces the corresponding relationship between the terminal and the initial base station with the corresponding relationship between the terminal and the target base station.

Optionally, when multiple base stations are communicatively connected to the data transmission device, including the target base station and excluding the initial base station, that is, the data transmission device does not store the corresponding relationship between the terminal and the initial base station, after obtaining the indication message, and from the indication message After the identifier of the target base station is acquired, the data transmission device establishes and stores the corresponding relationship between the terminal and the target base station.

The embodiment of the present application does not limit the sequence of S503 and S801. The server may execute S503 first, and then execute S801; it may also execute S801 first, and then execute S503; it may also execute S503 and S801 at the same time.

To sum up, the embodiment of the present application provides a data transmission method, which is applied to a data transmission device, and the data transmission device is respectively connected to multiple base stations, core network equipment, and service servers. In the case of obtaining the first service data sent by the service server to the terminal, when the serving base station of the terminal is switched from the initial base station among the multiple base stations to the target base station among the multiple base stations, an instruction message from the core network equipment may be obtained. Wherein, the instruction message includes the identifier of the target base station. Then, the first service data is sent to the terminal through the target base station.

In this way, when the serving base station of the terminal changes, the identity of the target base station after the serving base station of the terminal has changed can be obtained from the indication message from the core network equipment, and the first service data is sent to the terminal through the target base station, thereby accurately The business data is guided to ensure the continuity of data transmission.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods. In order to realize the above functions, it includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the support server into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. Optionally, the division of modules in this embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.

As shown in FIG. 9 , it is a schematic structural diagram of a data transmission device provided by an embodiment of the present application. The data transmission device may be used to execute the data transmission method shown in FIG. 5 , FIG. 6 , FIG. 7 or FIG. 8 . The data transmission device shown in FIG. 9 includes: an acquiring unit 901 and a sending unit 902 .

The obtaining unit 901 is configured to obtain the first service data sent by the service server to the terminal. For example, referring to FIG. 5 , the acquiring unit 901 is configured to execute S501.

The acquiring unit 901 is further configured to acquire an indication message from a core network device when the serving base station of the terminal is switched from the initial base station to the target base station. For example, referring to FIG. 5 , the acquiring unit 901 is configured to execute S502.

The sending unit 902 is configured to send the first service data obtained by the obtaining unit 901 to the terminal through the target base station based on the indication message obtained by the obtaining unit 901 . For example, referring to FIG. 5 , the sending unit 902 is configured to execute S503.

Optionally, the obtaining unit 901 is specifically configured to obtain a service message sent by the core network device when the serving base station of the terminal is switched from the initial base station to the target base station; and determine the service message as an indication message. For example, referring to FIG. 6 , the obtaining unit 901 is configured to execute S601-S602.

Optionally, the obtaining unit 901 is further configured to obtain a termination message sent by the core network device for instructing the terminal to disconnect the communication connection with the initial base station when the serving base station of the terminal is switched from the initial base station to the target base station. For example, referring to FIG. 7 , the acquiring unit 901 is configured to execute S701.

The data transmission device further includes: a processing unit 903 .

The processing unit 903 is configured to delete the corresponding relationship between the terminal and the initial base station in response to the termination message when the data transmission device stores the corresponding relationship between the terminal and the initial base station. For example, referring to FIG. 7 , the processing unit 903 is configured to execute S702.

Optionally, the processing unit 903 is further configured to update the correspondence between the terminal and the target base station. For example, referring to FIG. 8 , the processing unit 903 is configured to execute S801.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are run on the computer, the computer executes the data transmission method provided in the above-mentioned embodiments.

The embodiment of the present application also provides a computer program, which can be directly loaded into the memory and contains software codes. After the computer program is loaded and executed by the computer, it can realize the data transmission method provided by the above embodiments.

Those skilled in the art should be aware that, in the above one or more examples, the functions described in the present invention may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation. For example a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. A unit described as a separate component may or may not be physically separated, and a component shown as a unit may be one physical unit or multiple physical units, which may be located in one place or distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. If an integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (12)

1. A data transmission method, characterized in that it is applied to a data transmission device, and the data transmission device is respectively connected to a plurality of base stations, core network equipment and service servers; the service server is a server in a local network providing local services ; The data transmission method includes: Obtaining the first service data sent by the service server to the terminal; When the serving base station of the terminal is switched from the initial base station to the target base station, an indication message from the core network equipment is obtained; the indication message includes the identity of the target base station; the initial base station and the target base station are the Any two base stations in the plurality of base stations; the identity of the target base station is obtained by the core network equipment according to the registration message sent by the target base station; the registration message is used to request to establish a communication connection with the terminal ; Based on the indication message, send the first service data to the terminal through the target base station. 2. The data transmission method according to claim 1, wherein when the serving base station of the terminal is switched from the initial base station to the target base station, obtaining an indication message from a core network device includes: When the serving base station of the terminal is switched from the initial base station to the target base station, acquiring a service message sent by the core network equipment; the service message is used to transmit a second service to the terminal through the target base station data; the service message includes the identity of the target base station; The service message is determined as the indication message. 3. The data transmission method according to claim 2, further comprising: When the serving base station of the terminal is switched from the initial base station to the target base station, acquiring a termination message sent by the core network device for instructing the terminal to disconnect the communication connection with the initial base station; When the data transmission device stores the correspondence between the terminal and the initial base station, delete the correspondence between the terminal and the initial base station in response to the termination message. 4. The data transmission method according to any one of claims 1-3, characterized in that, after obtaining the indication message from the core network device, further comprising: Updating the corresponding relationship between the terminal and the target base station. 5. The data transmission method according to any one of claims 1-3, wherein the core network device is a user plane network element UPF of a public network. 6. A data transmission device, characterized in that the data transmission device is connected to a plurality of base stations, core network equipment and service servers respectively; the service server is a server in a local network providing local services; the data transmission device Including: acquiring unit and sending unit; The obtaining unit is configured to obtain the first service data sent by the service server to the terminal; The obtaining unit is further configured to obtain an indication message from the core network device when the serving base station of the terminal is switched from the initial base station to the target base station; the indication message includes the identity of the target base station; the initial The base station and the target base station are any two base stations in the plurality of base stations; the identity of the target base station is obtained by the core network equipment according to the registration message sent by the target base station; the registration message is used for requesting to establish a communication connection with the terminal; The sending unit is configured to send the first service data obtained by the obtaining unit to the terminal through the target base station based on the indication message obtained by the obtaining unit. 7. The data transmission device according to claim 6, wherein the acquiring unit is specifically used for: When the serving base station of the terminal is switched from the initial base station to the target base station, acquiring a service message sent by the core network equipment; the service message is used to transmit a second service to the terminal through the target base station data; the service message includes the identity of the target base station; The service message is determined as the indication message. 8. The data transmission device according to claim 7, wherein the acquiring unit is further configured to: When the serving base station of the terminal is switched from the initial base station to the target base station, acquiring a termination message sent by the core network device for instructing the terminal to disconnect the communication connection with the initial base station; The data transmission device further includes: a processing unit; The processing unit is configured to, when the data transmission device stores the correspondence between the terminal and the initial base station, delete the correspondence between the terminal and the initial base station in response to the termination message. 9. The data transmission device according to any one of claims 6-8, wherein the processing unit is further configured to: Updating the corresponding relationship between the terminal and the target base station. 10. The data transmission device according to any one of claims 6-8, wherein the core network device is a user plane network element UPF of a public network. 11. A data transmission device, characterized in that it includes a memory and a processor; the memory is used to store computer-executable instructions, and the processor is connected to the memory through a bus; when the data transmission device is running, the The processor executes the computer-executable instructions stored in the memory, so that the data transmission device executes the data transmission method according to any one of claims 1-5. 12. A computer-readable storage medium, characterized in that, the computer-readable storage medium comprises computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute any of claims 1-5. A data transmission method described in one item.

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