CN114401507B - Data transmission method, device and storage medium - Google Patents
Data transmission method, device and storage medium Download PDFInfo
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- CN114401507B CN114401507B CN202210049654.8A CN202210049654A CN114401507B CN 114401507 B CN114401507 B CN 114401507B CN 202210049654 A CN202210049654 A CN 202210049654A CN 114401507 B CN114401507 B CN 114401507B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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Abstract
The invention provides a data transmission method, a data transmission device and a storage medium, relates to the technical field of communication, and aims to solve the problem that a target base station after terminal switching cannot be acquired in the prior art. The method is applied to a data transmission device, and the data transmission device is respectively connected with a plurality of base stations, core network equipment and a service server. The method comprises the following steps: in the case of acquiring the first service data transmitted from the service server to the terminal, when the serving base station of the terminal is handed over from the initial base station of the plurality of base stations to the target base station of the plurality of base stations, an indication message from the core network device may be acquired. Wherein the indication message includes an identification of the target base station. And then, the first service data is sent to the terminal through the target base station. The method and the device can accurately guide the service data, and ensure the continuity of data transmission.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and storage medium.
Background
With the development of fifth generation mobile communication technology (5th generation mobile communication technology,5G) network technology, the needs of the vertical industry are more diversified (e.g., local data of an enterprise campus does not go out of the campus, while a 5G network is required to provide a high-bandwidth, low-latency communication link).
The existing technical scheme deploys a distribution device between the base station and the network device, so that distribution transmission of service data to a user plane network element (user plane function, UPF) of the public network or a service server of the local network can be realized in the data transmission process. However, in the process of transmitting service data in the local network, when a serving base station of a terminal (UE) is switched (for example, a terminal position moves), the offloading device cannot acquire a target base station after the terminal is switched, and thus cannot accurately guide a downlink data stream.
Disclosure of Invention
The application provides a data transmission method, a data transmission device and a storage medium, which are used for solving the problem that a target base station after terminal switching cannot be acquired in the prior art.
In order to achieve the above purpose, the present application adopts the following technical scheme:
in a first aspect, a data transmission method is provided and applied to a data transmission device, where the data transmission device is respectively connected to a plurality of base stations, a core network device and a service server. The method comprises the following steps: first, first service data sent to a terminal by a service server is obtained. When a serving base station of a terminal is switched from an initial base station of a plurality of base stations to a target base station of the plurality of base stations, an indication message from a core network device is acquired. Wherein the indication message includes an identification of the target base station. And 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 acquiring the indication message from the core network device specifically includes: when a service base station of a terminal is switched from an initial base station to a target base station, acquiring a service message sent by core network equipment; the service message is used for transmitting second service data to the terminal through the target base station; the service message comprises the identification of the target base station; the traffic message is determined as an indication message.
Optionally, the method further comprises: when a service base station of a terminal is switched from an initial base station to a target base station, acquiring a termination message sent by core network equipment and used for indicating the terminal to disconnect communication with the initial base station; when the data transmission device stores the corresponding relation between the terminal and the initial base station, the corresponding relation between the terminal and the initial base station is deleted in response to the termination message.
Optionally, after obtaining the indication message from the core network device, the method further includes: updating the corresponding relation 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 providing a local service.
In a second aspect, a data transmission device is provided, where the data transmission device is connected to a plurality of base stations, a core network device, and a service server, respectively; the data transmission device includes: an acquisition unit and a transmission unit; the acquisition unit is used for acquiring first service data sent to the terminal by the service server; the acquisition unit is further used for acquiring 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 an identification of the target base station; the initial base station and the target base station are any two base stations in the plurality of base stations; and the sending unit is used for sending the first service data acquired by the acquisition unit to the terminal through the target base station based on the indication message acquired by the acquisition unit.
Optionally, the acquiring unit is specifically configured to: when a service base station of a terminal is switched from an initial base station to a target base station, acquiring a service message sent by core network equipment; the service message is used for transmitting second service data to the terminal through the target base station; the service message comprises the identification of the target base station; the traffic message is determined as an indication message.
Optionally, the acquiring unit is further configured to: when a service base station of a terminal is switched from an initial base station to a target base station, acquiring a termination message sent by core network equipment and used for indicating the terminal to disconnect communication with the initial base station; the data transmission device further comprises: a processing unit; and the processing unit is used for responding to the termination message when the data transmission device stores the corresponding relation between the terminal and the initial base station, and deleting the corresponding relation between the terminal and the initial base station.
Optionally, the processing unit is further configured to: updating the corresponding relation 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 providing a local service.
In a third aspect, a data transmission apparatus is provided, comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the data transmission device is operated, the processor executes the computer-executable instructions stored in the memory to cause the data transmission device to perform the data transmission method according to the first aspect.
The data transmission device may be a network device or may be a part of a device in a network device, for example a chip system in a network device. The system-on-a-chip is configured to support the network device to implement the functions involved in the first aspect and any one of its possible implementations, for example, to obtain, determine, and send data and/or information involved in the data transmission method described above. The chip system includes a chip, and may also include other discrete devices or circuit structures.
In a fourth aspect, there is provided a computer readable storage medium comprising computer executable instructions which, when run on a computer, cause the computer to perform the data transmission method of the first aspect.
In a fifth aspect, there is also provided a computer program product comprising computer instructions which, when run on a data transmission apparatus, cause the data transmission apparatus to perform the data transmission method as described in the first aspect above.
It should be noted that the above-mentioned computer instructions may be stored in whole or in part on the first computer readable storage medium. The first computer readable storage medium may be packaged together with the processor of the data transmission device, or may be packaged separately from the processor of the data transmission device, which is not limited in this embodiment.
The description of the second, third, fourth and fifth aspects of the present application may refer to the detailed description of the first aspect; the advantages of the second aspect, the third aspect, the fourth aspect and the fifth aspect may be referred to as analysis of the advantages of the first aspect, and will not be described here.
In the embodiment of the present application, the names of the above-mentioned data transmission apparatuses do not constitute limitations on the devices or functional modules themselves, and in actual implementation, these devices or functional modules may appear under other names. Insofar as the function of each device or function module is similar to the present application, it is within the scope of the claims of the present application and the equivalents thereof.
These and other aspects of the present application will be more readily apparent from the following description.
The technical scheme provided by the application at least brings the following beneficial effects:
based on any one of the above aspects, the present application proposes a data transmission method, which is applied to a data transmission device, where the data transmission device is respectively connected to a plurality of base stations, a core network device, and a service server. In the case of acquiring the first service data transmitted from the service server to the terminal, when the serving base station of the terminal is handed over from the initial base station of the plurality of base stations to the target base station of the plurality of base stations, an indication message from the core network device may be acquired. Wherein the indication message includes an identification of the target base station. And then, the first service data is sent to the terminal through the target base station.
Therefore, when the service base station of the terminal changes, the identification of the target base station after the change of the service base station of the terminal 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, so that the service data can be accurately guided, and the continuity of data transmission is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a data transmission system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;
fig. 3 is a schematic hardware structure of a data transmission device according to an embodiment of the present application;
fig. 4 is a schematic diagram of another hardware structure of the data transmission device according to the embodiment of the present application;
fig. 5 is a flow chart of a data transmission method according to an embodiment of the present application;
fig. 6 is a flowchart of another data transmission method according to an embodiment of the present application;
fig. 7 is a flowchart of another data transmission method according to an embodiment of the present application;
fig. 8 is a flowchart of another data transmission method according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of another data transmission device according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", and the like are not limited in number and execution order.
As described in the background art, in the existing data transmission method, when a service base station of a terminal is switched in a service data transmission process of a local network, a shunting device cannot acquire a target base station after the terminal is switched, and thus cannot accurately guide downlink data streams.
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, where the data transmission device is respectively connected to a plurality of base stations, a core network device, and a service server. In the case of acquiring the first service data transmitted from the service server to the terminal, when the serving base station of the terminal is handed over from the initial base station of the plurality of base stations to the target base station of the plurality of base stations, an indication message from the core network device may be acquired. Wherein the indication message includes an identification of the target base station. And then, the first service data is sent to the terminal through the target base station.
Therefore, when the service base station of the terminal changes, the identification of the target base station after the change of the service base station of the terminal 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, so that the service data can be accurately guided, and the continuity of data transmission is ensured.
The data transmission method is suitable for a data transmission system. Fig. 1 shows a structure of the data transmission system. As shown in fig. 1, the data transmission system includes: a terminal 101, a plurality of base stations (including a base station 102 and a base station 103), a core network device 104, a service server 105, and a data transmission apparatus 106.
The terminal 101 in fig. 1 may be a device that provides voice and/or data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. The wireless terminal may communicate with one or more core networks via a radio access network (radio access network, RAN). The wireless terminals may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers with mobile terminals, as well as portable, pocket, hand-held, computer-built-in or car-mounted mobile devices which exchange voice and/or data with radio access networks, e.g. cell phones, tablet computers, notebook computers, netbooks, personal digital assistants (personal digital assistant, PDA).
The base station in fig. 1 may be a global system for mobile communications (global system for mobile communication, GSM), a base station (base transceiver station, BTS) in code division multiple access (code division multiple access, CDMA), a base station (node B) in wideband code division multiple access (wideband code division multiple access, WCDMA), a base station (eNB) in the internet of things (internet of things, ioT) or narrowband internet of things (narrow band-internet of things, NB-IoT), a base station in a future 5G mobile communication network or a future evolved public land mobile network (public land mobile network, PLMN), to which embodiments of the present application do not impose any limitation.
In practical applications, since the coverage of the base station is fixed, the serving base station of the terminal may change when the location of the terminal changes.
Illustratively, when a terminal moves from the coverage of base station 102 to the coverage of base station 103, the serving base station of the terminal switches from base station 102 to base station 103. In this case, the base station 102 is an initial base station, and the base station 103 is a target base station.
The core network device 104 in fig. 1 may be a user plane network element (user plane function, UPF) of the public network or a device deployed in the public network including the UPF for establishing a communication connection between the terminal and the public network device.
The public network, i.e. the Internet, is an aggregate of computer networks formed by interconnecting computer networks of different sizes (including local area networks, metropolitan area networks, wide area networks) at different locations around the world.
The service server 105 in fig. 1 is a server in a local network providing a local service, and is used to transmit service data of the local service to a terminal. The service server 105 may include a local database or a remote database (remote database).
The local network refers to a network that can cover a certain area, such as a network that covers places such as an enterprise campus, a cafe, a hotel, a campus, an airport, etc. The local network may be a home network, a private network, a wired network, a wireless network, or a combination of wired and wireless networks.
Alternatively, the core network device 104 and the service server 105 may be one server in a server cluster (including multiple servers), or may be a chip in the server, or may be a system on a chip in the server, or may be implemented by a Virtual Machine (VM) deployed on a physical machine, which is not limited in this embodiment of the present application.
The data transmission device 106 in fig. 1 is communicatively connected to the plurality of base stations, the core network device 104, and the service server 105, respectively, and is configured to direct a data stream. The data transmission means 106 comprises an identification of a plurality of base stations.
As shown in fig. 2, the data transmission apparatus 106 includes a rule configuration module 201 (for configuring a splitting rule of a data stream), a data parsing and matching module 202 (for parsing service data, determining a destination address of the service data according to the splitting rule configured by the rule configuration module 201), and a data processing module 203 (for storing a correspondence between terminals and base stations, and decapsulating the service data according to the splitting 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 invoke the data parsing and matching module 202 to parse the service data, and determine the destination address of the service data according to the offloading rule configured by the rule configuration module 201.
When the data parsing and matching module 202 determines that the destination address is the core network device 104, the data transmission apparatus 106 transparently transmits (pass-through) 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 invokes the data processing module 203 to repackage the service data, and sends the repackaged service data to the service server 105.
Alternatively, the data transmission device 106 may be a device that is set independently of a plurality of base stations, or may be a functional module in any one of the plurality of base stations.
When the data transmission apparatus 106 is provided independently of a plurality of base stations, the data transmission apparatus 106 may be a gateway server, a router, or other devices including all the functional blocks in fig. 2.
It will be readily appreciated that when the data transmission device 106 is a functional module within any of a plurality of base stations, the manner of communication between the data transmission device 106 and any of the plurality of base stations is communication between modules within any of the plurality of base stations. In this case, the communication flow therebetween is the same as "in the case where the data transmission apparatus 106 and the plurality of base stations are independent of each other".
For ease of understanding, the present application will mainly be described by taking the example in which the data transmission device 106 and the plurality of base stations are disposed independently of each other.
The basic hardware structures of the terminal 101, the base station 102, the base station 103, the core network device 104, the service server 105 and the data transmission apparatus 106 in the data transmission system are similar, and all include elements included in the communication apparatus shown in fig. 3 or fig. 4. The following describes the hardware configuration of 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, taking the communication devices shown in fig. 3 and 4 as examples.
Fig. 3 is a schematic hardware structure of a communication device according to an embodiment of the present application. The communication device comprises a processor 21, a memory 22, a communication interface 23, a bus 24. The processor 21, the memory 22 and the communication interface 23 may be connected by a bus 24.
The processor 21 is a control center of the communication device, and may be one processor or a collective term of a plurality of processing elements. For example, the processor 21 may be a general-purpose central processing unit (central processing unit, CPU), or may be another general-purpose processor. Wherein the general purpose processor may be a microprocessor or any conventional processor or the like.
As one example, processor 21 may include one or more CPUs, such as CPU 0 and CPU 1 shown in fig. 3.
In a possible implementation, the memory 22 may exist separately from the processor 21, and the memory 22 may be connected to the processor 21 by a bus 24 for storing instructions or program code. The processor 21, when calling and executing instructions or program code stored in the memory 22, is capable of implementing the data transmission method provided in the following embodiments of the present invention.
In the embodiment of the present application, the software programs stored in the memory 22 are different for 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, so that the functions implemented by 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 are different. The functions performed with respect to the respective devices will be described in connection with the following flowcharts.
In another possible implementation, the memory 22 may also be integrated with the processor 21.
A communication interface 23 for connecting the communication device with other devices via a communication network, which may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN) or the like. The communication interface 23 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.
Bus 24 may be an industry standard architecture (industry standard architecture, ISA) bus, an external device interconnect (peripheral component interconnect, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 2, but not only one bus or one type of bus.
Fig. 4 shows another hardware configuration of the communication apparatus 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. The processor 31 is coupled to a communication interface 32.
The function of the processor 31 may be as described above with reference to the processor 21. The processor 31 also has a memory function and can function as the 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 noted that the structure shown in fig. 3 (or fig. 4) does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 3 (or fig. 4), or may combine some components, or may be arranged in different components.
The following describes in detail the data transmission method provided in the embodiment of the present application with reference to the accompanying drawings.
As shown in fig. 5, the data transmission method provided in the embodiment of the present application is applied to a data transmission device, where the data transmission device is respectively connected to a plurality of base stations, a core network device, and a service server, and the data transmission method includes: S501-S503.
S501, the data transmission device acquires first service data sent to the terminal by the service server.
Alternatively, the first service data may be text data, image data, audio data, or mixed data including a plurality of data types, etc.
Alternatively, the service server may be a server in a local network providing a local service.
Optionally, when data is transmitted between the terminal and the service server, the terminal may send a service request message to the service server through the data transmission device. Accordingly, 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 acquire the first service data transmitted from the service server to the terminal.
When the data transmission device sends the service request message of the terminal to the service server, the destination address of the service request message can be determined as the service server by analyzing the service request message from the terminal. Subsequently, the data transmission device processes the data of the service request message and sends the processed service request message to the service server.
Alternatively, 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 acquire the first service data sent by the service server to the terminal.
S502, when a service base station of a terminal is switched from an initial base station to a target base station, a data transmission device acquires an indication message from 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 may send a registration message for requesting to establish communication connection with the terminal to the core network device, so that the core network device may obtain the identifier of the target base station according to the registration message. Then, the core network device may send an indication message including the identifier of the target base station to the data transmission apparatus, so that the data transmission apparatus obtains the identifier of the target base station in the indication message, thereby sending the first service message to the terminal through the target base station.
Alternatively, the target base station may be identified by an evolved-universal mobile telecommunications system terrestrial radio access network (evolution universal-mobile-telecommunications-system terrestrial radio access network, E-UTRAN) cell Global identifier (E-UTRAN cell Global identifier, ECGI), cell Identity (CID), identification location area code (location area code, LAC), base station identification (E node B identity, eNB ID), global base station identifier (Global E node B identifier, global eNB ID), or the like.
Alternatively, the core network device may be a UPF of the public network.
Alternatively, the data transmission apparatus may acquire the indication message from the core network device by the following two methods.
The first method is as follows: the data transmission means periodically transmits a request message for requesting acquisition of the identification of the target base station to the core network device. The core network device transmits an indication message including an identification of the target base station to the data transmission apparatus in response to the request message.
The second method is as follows: and the core network equipment sends the service message to the terminal through the data transmission device. When the service message includes the identification of the target base station, the data transmission apparatus determines the service message as an indication message.
Optionally, referring to fig. 2, the method for the data transmission device to obtain the identifier of the target base station in the indication message includes: the data transmission device may invoke the data parsing and matching module 202 to parse the indication message, thereby obtaining the identification of the target base station in the indication message.
S503, based on the indication message, the data transmission device sends first service data to the terminal through the target base station.
Optionally, after the first service data and the identifier of the target base station are acquired, the data transmission device may send the repackaged first service data to the target base station. And then, the target base station transmits the repackaged first service data to the terminal.
The preset terminal requests the first service data of the service server as a plurality of image frames of a certain video. The data transmission device acquires a plurality of image frames sent to the terminal by the service server. After the serving base station of the terminal is switched from the base station 1 to the base station 2, the data transmission device receives the message sent by the UPF (including ECGI "4CF1E0D" of the serving base station of the terminal), and determines that the serving base station after the terminal is switched is the base station 2 corresponding to "4CF1E 0D". Then, the data transmission device repackages the plurality of image frames and transmits the repackaged plurality of image frames to the base station 2. Subsequently, the base station 2 transmits the repackaged plurality of image frames to the terminal.
In one embodiment, referring to fig. 5, as shown in fig. 6, when a serving base station of a terminal is handed over from an initial base station to a target base station in S502, a method for a data transmission apparatus to obtain an indication message from a core network device specifically includes: S601-S602.
S601, when a service base station of a terminal is switched from an initial base station to a target base station, a data transmission device acquires a service message sent by core network equipment.
The service message is used for transmitting second service data to the terminal through the target base station. The traffic message includes an identification 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 may send a registration message for requesting to establish communication connection with the terminal to the core network device, so that the core network device may obtain the identifier of the target base station according to the registration message. The core network device may send a registration success message indicating establishment of a communication connection with the terminal to the target base station in response to the above-described registration message. The core network device may then send a service message including the second service data to the terminal via the target base station.
Optionally, the second service data is service data of a public network service. The public network service may be a voice over Wi-Fi (VoWiFi) service based on a wireless network communication technology (wireless fidelity, wiFi), a internet protocol television (internet protocol television, IPTV) service, a data service, a smart home service, or the like.
S602, the data transmission device determines the service message as an indication message.
Optionally, in conjunction with fig. 2, after the data transmission device acquires the service message, the data parsing and matching module 202 may be invoked to parse the service message. When the identification of the target base station is included in the service message, the data transmission apparatus may acquire the identification of the target base station from the path sequence of the service message so that the first service data is transmitted to the terminal through the target base station, and thus the data transmission apparatus may determine the service message as the indication message.
For example, after the serving base station of the terminal is switched from the base station 1 to the base station 2, the data transmission device receives the VoWiFi service message sent by the UPF. The data transmission device parses the ECGI "4CF1E0D" of the serving base station including the terminal in the path sequence of the VoWiFi service message, and therefore, the data transmission device determines the VoWiFi service message as the indication message. .
In one embodiment, as shown in fig. 7, the data transmission method further includes: s701, performing operation.
S701, when a service base station of a terminal is switched from an initial base station to a target base station, a data transmission device acquires a termination message sent by core network equipment and used for indicating the terminal to disconnect communication with the initial base station.
Specifically, when the serving base station of the terminal is handed over from the initial base station to the target base station, the target base station may send a registration message for requesting establishment of a communication connection with the terminal to the core network device. The core network device may send a registration success message for indicating establishment of a communication connection with the terminal to the target base station in response to the above-mentioned registration message, and simultaneously send a termination message for indicating disconnection of the communication connection between the terminal and the initial base station to the initial base station, so that the data transmission apparatus stops sending the service message to the terminal through the initial base station.
Alternatively, the termination message may include an end marker (end marker) packet.
Illustratively, according to a handover procedure of the third generation partnership project (3rd generation partnership project,3GPP) protocol, when a serving base station of a terminal is handed over from the base station 1 to the base station 2, the base station 2 may transmit a registration message for requesting establishment of a communication connection with the terminal to the UPF. After the registration is successful, the UPF sends an end marker data packet to the base station 1 through an N3 interface, and the terminal is indicated to disconnect communication with the base station 1.
S702, when the data transmission device stores the corresponding relation between the terminal and the initial base station, the data transmission device responds to the termination message and deletes the corresponding relation between the terminal and the initial base station.
Optionally, when the terminal establishes communication connection with an initial base station of the plurality of base stations, the data transmission device may acquire an identifier of the initial base station from the indication message from the core network device, and establish and store a correspondence between the terminal and the initial base station.
Optionally, referring to fig. 2, the data transmission device invokes the data processing module 203 to store the correspondence between the terminal and the initial base station.
The preset data transmission device stores the correspondence between the terminal and the base station 1, for example. After the data transmission device acquires the end marker data packet sent by the UPF to the base station 1 through the N3 interface, deleting the corresponding relation between the terminal and the base station 1.
In one embodiment, in conjunction with fig. 5, as shown in fig. 8, after S502, the data transmission method further includes: s801.
S801, the data transmission device updates the corresponding relation between the terminal and the target base station.
Optionally, when the plurality of base stations are communicatively connected with the data transmission device and include an initial base station and a target base station, that is, the data transmission device stores the correspondence between the terminal and the initial base station, and after the indication message is obtained and the identifier of the target base station is obtained from the indication message, the data transmission device replaces the correspondence between the terminal and the initial base station with the correspondence between the terminal and the target base station.
Optionally, when the plurality of base stations are communicatively connected with the data transmission device and include the target base station and do not include the initial base station, that is, the data transmission device does not store the correspondence between the terminal and the initial base station, after the indication message is obtained and the identifier of the target base station is obtained from the indication message, the data transmission device establishes and stores the correspondence between the terminal and the target base station.
The embodiment of the present application is not limited to the sequence of S503 and S801. The server may execute S503 first and then S801; s801 may be executed first, and S503 may be executed later; s503 and S801 may also be performed simultaneously.
In summary, the embodiment of the application provides a data transmission method, which is applied to a data transmission device, wherein the data transmission device is respectively connected with a plurality of base stations, core network equipment and a service server. In the case of acquiring the first service data transmitted from the service server to the terminal, when the serving base station of the terminal is handed over from the initial base station of the plurality of base stations to the target base station of the plurality of base stations, an indication message from the core network device may be acquired. Wherein the indication message includes an identification of the target base station. And then, the first service data is sent to the terminal through the target base station.
Therefore, when the service base station of the terminal changes, the identification of the target base station after the change of the service base station of the terminal 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, so that the service data can be accurately guided, and the continuity of data transmission is ensured.
The foregoing description of the solution provided in the embodiments of the present application has been mainly presented in terms of a method. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The embodiment of the application may divide the function modules of the support server according to the above method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. Optionally, the division of the modules in the embodiments of the present application is schematic, which is merely a logic function division, and other division manners may be actually implemented.
Fig. 9 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. The data transmission device may be used to perform the method of data transmission shown in fig. 5, 6, 7 or 8. The data transmission apparatus shown in fig. 9 includes: an acquisition unit 901 and a transmission unit 902.
An acquiring unit 901, configured to acquire first service data sent by a service server to a terminal. For example, in connection with fig. 5, the acquisition unit 901 is for executing S501.
The acquiring unit 901 is further configured to acquire an indication message from the core network device when the serving base station of the terminal is handed over from the initial base station to the target base station. For example, in connection with fig. 5, the acquisition unit 901 is for executing S502.
A transmitting unit 902, configured to transmit, based on the indication message acquired by the acquiring unit 901, the first service data acquired by the acquiring unit 901 to the terminal through the target base station. For example, in connection with fig. 5, the transmitting unit 902 is configured to execute S503.
Optionally, the acquiring unit 901 is specifically configured to acquire a service message sent by the core network device when a serving base station of the terminal is switched from an initial base station to a target base station; the traffic message is determined as an indication message. For example, in connection with fig. 6, the acquisition unit 901 is used to perform S601-S602.
Optionally, the acquiring unit 901 is further configured to acquire a termination message sent by the core network device and used for indicating that the terminal is disconnected from 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, in connection with fig. 7, the acquisition unit 901 is for executing S701.
The data transmission device further comprises: a processing unit 903.
The processing unit 903 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. For example, in connection with fig. 7, the processing unit 903 is configured to execute S702.
Optionally, the processing unit 903 is further configured to update a correspondence between the terminal and the target base station. For example, in connection with fig. 8, the processing unit 903 is configured to execute S801.
The present application also provides a computer-readable storage medium, which includes computer-executable instructions that, when executed on a computer, cause the computer to perform the data transmission method provided in the above embodiments.
The embodiment of the present application also provides a computer program, which can be directly loaded into a memory and contains software codes, and the computer program can implement the data transmission method provided in the above embodiment after being loaded and executed by a computer.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these 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.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and the division of modules or units, for example, is merely a logical function division, and other manners of division are possible when actually implemented. For example, multiple units or components may be combined or may be integrated into another device, 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. The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
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 software functional units. The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (12)
1. The data transmission method is characterized by being applied to a data transmission device, wherein the data transmission device is respectively connected with a plurality of base stations, core network equipment and a service server; the service server is a server in a local network for providing local service; the data transmission method comprises the following steps:
acquiring first service data sent to a terminal by the service server;
when a service base station of the terminal is switched from an initial base station to a target base station, acquiring an indication message from the core network equipment; the indication message comprises an identification of the target base station; the initial base station and the target base station are any two base stations in the plurality of base stations; the identifier of the target base station is obtained by the core network equipment according to a registration message sent by the target base station; the registration message is used for requesting to establish communication connection with the terminal;
and based on the indication message, sending the first service data to the terminal through the target base station.
2. The data transmission method according to claim 1, wherein the acquiring the indication message from the core network device when the serving base station of the terminal is handed over from the initial base station to the target base station comprises:
When a service 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 for transmitting second service data to the terminal through the target base station; the service message comprises the identification of the target base station;
and determining the service message as the indication message.
3. The data transmission method according to claim 2, further comprising:
when a service 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 and used for indicating the terminal to disconnect communication with the initial base station;
when the data transmission device stores the corresponding relation between the terminal and the initial base station, the corresponding relation between the terminal and the initial base station is deleted in response to the termination message.
4. A data transmission method according to any one of claims 1-3, wherein after the obtaining the indication message from the core network device, further comprises:
and updating the corresponding relation between the terminal and the target base station.
5. A data transmission method according to any one of claims 1-3, characterized in that the core network device is a user plane network element UPF of a public network.
6. The data transmission device is characterized by being respectively connected with a plurality of base stations, core network equipment and a service server; the service server is a server in a local network for providing local service; the data transmission device includes: an acquisition unit and a transmission unit;
the acquisition unit is used for acquiring first service data sent to the terminal by the service server;
the acquiring unit is further configured to acquire 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 comprises an identification of the target base station; the initial base station and the target base station are any two base stations in the plurality of base stations; the identifier of the target base station is obtained by the core network equipment according to a registration message sent by the target base station; the registration message is used for requesting to establish communication connection with the terminal;
the sending unit is configured to send, based on the indication message acquired by the acquiring unit, the first service data acquired by the acquiring unit to the terminal through the target base station.
7. The data transmission device according to claim 6, wherein the acquisition unit is specifically configured to:
When a service 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 for transmitting second service data to the terminal through the target base station; the service message comprises the identification of the target base station;
and determining the service message as the indication message.
8. The data transmission apparatus according to claim 7, wherein the acquisition unit is further configured to:
when a service 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 and used for indicating the terminal to disconnect communication with the initial base station;
the data transmission device further includes: a processing unit;
and the processing unit is used for responding to the termination message when the data transmission device stores the corresponding relation between the terminal and the initial base station, and deleting the corresponding relation between the terminal and the initial base station.
9. The data transmission device according to any one of claims 6-8, wherein the processing unit is further configured to:
and updating the corresponding relation between the terminal and the target base station.
10. The data transmission apparatus 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 comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the data transmission apparatus is operated, the processor executes the computer-executable instructions stored in the memory to cause the data transmission apparatus to perform the data transmission method according to any one of claims 1 to 5.
12. A computer readable storage medium comprising computer executable instructions which, when run on a computer, cause the computer to perform the data transmission method according to any of claims 1-5.
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