CN110708721A - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN110708721A CN110708721A CN201910838632.8A CN201910838632A CN110708721A CN 110708721 A CN110708721 A CN 110708721A CN 201910838632 A CN201910838632 A CN 201910838632A CN 110708721 A CN110708721 A CN 110708721A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
Abstract
A data transmission method and a device relate to the technical field of communication and can solve the problem of low data transmission performance. The method comprises the following steps: receiving data to be transmitted sent by core network equipment; determining the receiving rate and the sending rate of data to be transmitted; determining the link quality of a first communication link according to the receiving rate and the sending rate, wherein the first communication link is a link between first network equipment and a terminal; and if the link quality of the first communication link is less than the preset transmission quality, shunting the data to be transmitted to second network equipment. Under the communication system, data are reasonably distributed for the communication link according to the receiving rate and the sending rate of the data to be transmitted, and the data transmission performance is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
Background
With the continuous development and maturity of mobile internet services, higher and higher requirements are put on the transmission rate and the transmission delay of wireless communication. In order to achieve higher transmission rate and lower transmission delay, a dual-connection system is introduced in the wireless communication standard.
In a dual-connectivity system, a terminal may establish communication connections with two base stations simultaneously and transmit data via a communication link with each base station. In the prior art, data sent by core network equipment is distributed to two communication links according to a preset proportion and transmitted through the two communication links. If the distribution ratio is not proper, data blockage on one communication link can be caused, and the other communication link is idle, so that the resources of the two communication links cannot be reasonably utilized, and the transmission performance of the data is reduced.
Disclosure of Invention
The embodiment of the application provides a data transmission method and device, which are used for reasonably distributing data for a communication link in a communication system.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, a data transmission method is provided, which is applied to a communication system including a first network device and a second network device, where the first network device and the second network device are both connected to a terminal; the data transmission method is applied to first network equipment and comprises the following steps: receiving data to be transmitted sent by core network equipment; determining the receiving rate and the sending rate of data to be transmitted; determining the link quality of a first communication link according to the receiving rate and the sending rate, wherein the first communication link is a link between first network equipment and a terminal; and if the link quality of the first communication link is less than the preset transmission quality, shunting the data to be transmitted to second network equipment.
It can be seen that, in the embodiment of the present application, the first network device determines the data offloading policy according to the link quality of the first communication link. Compared with the prior art, in the scheme provided by the embodiment of the application, the resources of the communication link are reasonably utilized, and the data transmission performance is improved.
In a second aspect, a data transmission apparatus is provided, where the apparatus is applied to a communication system including a first network device and a second network device, and both the first network device and the second network device are connected to a terminal. The data transmission device is applied to first network equipment and comprises: the device comprises a receiving unit, a determining unit and a processing unit. The receiving unit is configured to receive data to be transmitted, where the data is sent by core network equipment. The determining unit is configured to determine a receiving rate and a sending rate of the data to be transmitted, which are received by the receiving unit. The determining unit is further configured to determine, according to the receiving rate and the sending rate, a link quality of a first communication link, where the first communication link is a link between the first network device and the terminal. The processing unit is configured to, if the link quality of the first communication link determined by the determining unit is less than the preset transmission quality, distribute the data to be transmitted to the second network device.
In a third aspect, a data transmission apparatus is provided, which includes 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 computer-executable instructions stored in the memory to cause the data transmission device to execute 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 the network device, such as a system on chip in the network device. The system on chip is configured to support the network device to implement the functions involved in the first aspect and any one of the possible implementations thereof, for example, to receive, determine, and offload data and/or information involved in the 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 storage medium is provided, which comprises computer executable instructions, which when executed 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 all or part of the computer instructions may be stored on the first computer storage medium. The first computer 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 of the application.
For the descriptions of the second, third, fourth and fifth aspects in this application, reference may be made to the detailed description of the first aspect; in addition, for the beneficial effects of the second aspect, the third aspect, the fourth aspect and the fifth aspect, reference may be made to the beneficial effect analysis of the first aspect, and details are not repeated here.
In the embodiment of the present application, the names of the above data transmission apparatuses do not limit the devices or the functional modules themselves, and in actual implementation, the devices or the functional modules may appear by other names. Insofar as the functions of the respective devices or functional modules are similar to those of the present application, they fall within the scope of the claims of the present application and their equivalents.
These and other aspects of the present application will be more readily apparent from the following description.
Drawings
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 3 is a schematic flow diagram illustrating a process of adding an NR base station as a secondary station in an existing LTE base station according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application;
fig. 5 is a schematic flowchart of another data transmission method according to an embodiment of the present application;
fig. 6 is a schematic flowchart of a data transmission apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
It should be noted that in the embodiments of the present application, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that the intended meaning is consistent when the difference is not emphasized.
For the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first" and "second" are used to distinguish the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the terms "first" and "second" are not used to limit the quantity and execution order.
Existing communication systems typically use Non-independent (NSA) networking. For example, the non-independent manner may be that the fourth generation communication technology (the4th generation mobile communication technology, 4G) network independently deploys the control plane (4G network carries control signaling), the 5th generation communication technology (5G network and 4G network) network jointly deploys the user plane (5G network and 4G network carry user plane data), or the 5G network independently deploys the user plane (only 5G network carries user plane data). An option3x architecture signaling plane of the NSA depends on an evolved node base (eNB) in a Long Term Evolution (LTE) network, an air interface and an S1 interface of a base station (gNB) in a 5G network have no signaling plane, and a user plane performs offloading through a Packet Data Convergence Protocol (PDCP) layer and distributes to the eNB and the gNB for data transmission.
In the prior art, core network equipment sends data to be transmitted to an NR base station, and the NR base station directly allocates the data to an LTE base station and an NR base station according to a preset allocation ratio to perform data transmission. However, if the allocation ratio is not appropriate, data congestion on one communication link may be caused, and the other communication link is idle, so that the resources of the two communication links cannot be reasonably utilized, and the data transmission performance is reduced.
In view of the above problems, in the data transmission method provided in the embodiments of the present application, a first network device (e.g., an NR base station) determines a data offloading policy according to link quality of a first communication link, so as to effectively improve resource utilization of the communication link and data transmission performance.
The data transmission method provided by the embodiment of the application is suitable for a communication system. Fig. 1 shows a structure of the communication system. As shown in fig. 1, the communication system includes a core network device 10, a first network device 11, a second network device 12, and a terminal 13. The first network device is connected with the core network device 10 through an S1-U interface, the second network device 12 is connected with the core network device 10 through an S1-C interface, the first network device 11 and the second network device 12 are connected through an X2 interface (including an X2-C interface and an X2-U interface), the first network device 11 and the terminal 13 are connected through a first communication link 14, and the second network device 12 and the terminal 13 are connected through a second communication link 15.
The core network device 10 in fig. 1 has a user plane function and a control plane function, and generally, a user plane network element is used to represent a device capable of implementing the user plane function of the core network device 10, and a control plane network element is used to represent a device capable of implementing the control plane function of the core network device, where the user plane network element and the control plane network element may be integrated in the same device or may be independently set.
The first network device 11 and the second network device 12 in fig. 1 may be wireless Access Points (APs), enbs, or NR gnbs, which is not specifically limited in this embodiment.
In the communication system shown in fig. 1, the first network device 11 is used for independently deploying the user plane (only the first network device 11 carries user plane data), and the second network device 12 is used for independently deploying the control plane (the second network device 12 carries control signaling), for example: in the LTE-NR dual-connection communication system, MN is an LTE base station and SN is an NR base station.
The basic hardware structures of the core network device 10, the first network device 11, the second network device 12, and the terminal 13 are similar, and all include elements included in the communication apparatus shown in fig. 2. The hardware structures of the core network device 10, the first network device 11, the second network device 12, and the terminal 13 will be described below by taking the communication apparatus shown in fig. 2 as an example.
As shown in fig. 2, the communication device may include 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 by a bus 24.
The processor 21 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 21 may be a Central Processing Unit (CPU), other general-purpose processors, or the like. Wherein a general purpose processor may be a microprocessor or any conventional processor or the like.
For one embodiment, processor 21 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 2.
The memory 22 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
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 via a bus 24 for storing instructions or program codes. The processor 21, when calling and executing instructions or program codes stored in the memory 22, can implement the data transmission method provided by the following embodiments of the present invention.
In the embodiment of the present invention, the software programs stored in the memory 22 are different for the core network device 10, the first network device 11, the second network device 12, and the terminal 13, so that the functions implemented by the core network device 10, the first network device 11, the second network device 12, and the terminal 13 are different. The functions performed by the devices will be described in connection with the following flow charts.
In another possible implementation, 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, which may be an ethernet, a radio access network, a Wireless Local Area Network (WLAN), or the like. The communication interface 23 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.
The bus 24 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 2, but it is not intended that there be only one bus or one type of bus.
It is noted that the configuration shown in fig. 2 does not constitute a limitation of the communication device, which may comprise more or less components than those shown in fig. 2, or a combination of some components, or a different arrangement of components than those shown in fig. 2.
In the communication system shown in fig. 1, the network systems supported by the first network device and the second network device may be the same or different. For example, in the communication system shown in fig. 1, the core network device is a core network device (e.g., MME) of the EPC, the first network device is an NR base station of a 5G network, and the second network device is an LTE base station of a 4G network.
The following describes a data transmission method provided in an embodiment of the present application with reference to the communication system shown in fig. 1 and the communication device shown in fig. 2.
For convenience of understanding, in the embodiment of the present application, a core network device in which the first network device 11 is an NR base station, the second network device 12 is an LTE base station, and the core network device is an EPC is taken as an example, and the embodiment of the present application is described.
The data transmission method provided by the embodiment of the application comprises the following steps: in a communication system, a procedure in which an LTE base station adds an NR base station as a secondary station. As shown in fig. 3, the adding of the NR base station as the secondary station by the LTE base station includes:
1. the MN sends a gbnb Addition Request (SgNB Addition Request) to the SN.
2. The SN prepares transmission resources and air interface resources, and after the preparation is completed, the SN sends gNB Addition Request acknowledgement information (SgNB Addition Request acknowledgement) to the MN, wherein the gNB Addition Request acknowledgement information comprises air interface configuration of the SN.
3. The MN sends the air interface configuration information of the SN to the terminal in the form of a Radio Resource Control (RRC) Connection Reconfiguration message (RRC Connection Reconfiguration) to notify the terminal of connecting the MN.
4. The UE sends a RRC connection reconfiguration Complete message to the SN to notify the MN that the RRC connection reconfiguration of the UE is Complete.
5. The SN sends a Reconfiguration Complete from gNB (SgNB Reconfiguration Complete) message to the MN to inform the SN that the gNB Reconfiguration of the MN is Complete.
6. And carrying out random access between the terminal UE and the SN.
7-12, converting the ERAB of the S1 interface from the LTE side to the NR side through an Evolved Radio Access Bearer (ERAB) Modification indication (Modification indication) message and an ERAB Modification confirmation (Modification confirmation) message, and completing the adding process of the auxiliary station; the specific process is shown in the figure and is not described herein again.
Fig. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application. The embodiment of the present application is applied to the communication system shown in fig. 1, and the data transmission method is applied to an NR base station, and includes:
s401, the NR base station receives data to be transmitted sent by the core network equipment.
And the data to be transmitted is downlink data which is issued to the terminal by the core network equipment.
S402, the NR base station determines the receiving rate and the sending rate of the data to be transmitted.
When the NR base station receives data to be transmitted sent by the core network device, the receiving rate can be determined.
After receiving data to be transmitted sent by core network equipment, the NR base station sends the data to be transmitted to a terminal by adopting a first communication link. In the process of transmitting data, a Radio Link Control (RLC) layer of the NR base station determines a transmission rate of the data (the transmission rate is a transmission rate of the data to be transmitted), and transmits the transmission rate to a PDCP layer of the NR base station.
Optionally, the NR base station periodically determines a transmission rate of data to be transmitted. For example, the transmission rate fed back by the RLC layer is received every 10ms, and the transmission rate fed back by the RLC layer is determined as the transmission rate of data to be transmitted.
S403, the NR base station determines the link quality of the first communication link according to the receiving rate and the sending rate.
The first communication link is a link between the NR base station and the terminal.
The NR base station calculates a ratio of the reception rate to the transmission rate, and determines a link quality of the first communication link based on the ratio.
S404, the NR base station determines whether the link quality of the first communication link is less than a preset transmission quality.
And if the link quality of the first communication link is less than the preset transmission quality, the quality of the first communication link is poor. If the data is transmitted through the first communication link, the transmission delay of the data to be transmitted is increased. Therefore, in this case, the terminal needs to access the NR base station and the LTE base station at the same time so that the terminal can receive data to be transmitted through two communication links at the same time, and the NR base station performs S405 described below.
If the link quality of the first communication link is greater than or equal to the preset transmission quality, the quality of the first communication link is good. If the data is transmitted through the first communication link, the transmission delay of the data to be transmitted is not influenced. Therefore, in this case, the terminal only needs to access the NR base station to receive the data to be transmitted, and the terminal does not need to access the LTE base station, thereby affecting the link quality of the second communication link, and the NR base station performs S406 described below.
S405, the NR base station distributes the data to be transmitted to the second network equipment.
Because the link quality of the first communication link is less than the preset transmission quality, the PDCP of the NR base station adopts a shunting strategy according to the preset proportion to divide a part of data to be transmitted for the LTE base station, so that the user perception is improved.
Illustratively, if the link quality of the first communication link is less than the preset transmission quality, the core network device issues 800M data to be transmitted, and the PDCP of the NR base station adopts a split flow strategy according to a preset ratio, where the preset ratio is: the second communication link: the first communication link is 1: therefore, the NR base station calculates the amount of data to be split, and forwards the amount of data to the second communication link through the LTE base station to obtain the amount of data split by 80M, where the amount of data carried by the second communication link is 80M, and meanwhile forwards the amount of data to the first communication link 720M through the NR base station, and the amount of data carried by the first communication link is 720M.
S406, the NR base station transmits the data to be transmitted only in the first network device.
Since the link quality of the first communication link is greater than or equal to the preset transmission quality, the data to be transmitted is transmitted only in the first communication link.
Optionally, as shown in fig. 5, in S403, the method specifically includes:
s4031, a ratio of the reception rate to the transmission rate is calculated.
The NR base station calculates a ratio according to the receiving rate and the transmitting rate, where m denotes the receiving rate, n denotes the transmitting rate, a denotes the ratio of the receiving rate to the transmitting rate, and a is n/m.
S4032, determining link quality of the first communication link according to a ratio of the receiving rate to the transmitting rate.
Specifically, in this embodiment of the present application, the NR base station is provided with a preset threshold, where the preset threshold is used to determine the link quality of the first communication link, and the preset threshold may be adjusted according to a coverage condition of the 5G network, so that the data to be transmitted may be distributed more reasonably.
For example, in the embodiment of the present application, a preset threshold is denoted by B, and if a ratio of a receiving rate to a sending rate is smaller than the preset threshold, that is, a is smaller than B, it is determined that link quality of a first communication link is smaller than a preset transmission quality; it is indicated that the transmission rate of the data to be transmitted in the first communication link is lower than the preset threshold, and therefore, it is determined that the link quality of the first communication link is lower than the preset transmission quality.
According to the embodiment of the application, the first network device determines a data distribution strategy according to the link quality of the first communication link. Compared with the prior art, in the scheme provided by the embodiment of the application, the resources of the communication link are reasonably utilized, and the data transmission performance is improved.
In the embodiment of the present application, the data transmission device may be divided into the functional modules or the functional units according to the method example, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module or processing unit. The integrated modules or units may be implemented in the form of hardware, or may also be implemented in the form of software functional modules or functional units. The division of the modules or units in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
As shown in fig. 6, an embodiment of the present application provides a data transmission apparatus, which is applied to a communication system including a first network device and a second network device, where both the first network device and the second network device are connected to a terminal; the data transmission device is applied to first network equipment and comprises: a receiving unit 601, a determining unit 602 and a processing unit 603;
a receiving unit 601, configured to receive data to be transmitted, where the data is sent by a core network device;
a determining unit 602, configured to determine a receiving rate and a sending rate of the data to be transmitted received by the receiving unit 601;
a determining unit 602, further configured to determine, according to the receiving rate and the sending rate, a link quality of a first communication link, where the first communication link is a link between the first network device and the terminal;
the processing unit 603 is configured to, if the link quality of the first communication link determined by the determining unit 602 is less than the preset transmission quality, offload data to be transmitted to the second network device.
Optionally, the processing unit 603 is further configured to transmit the data to be transmitted only in the first network device if the link quality of the first communication link determined by the determining unit 602 is greater than or equal to the preset transmission quality.
Optionally, the data transmission device further includes: a calculation unit 604;
a calculating unit 604, configured to calculate a ratio of a receiving rate to a sending rate;
a determining unit 602, configured to determine that the link quality of the first communication link is less than a preset transmission quality if the ratio of the receiving rate to the sending rate calculated by the calculating unit is less than a preset threshold;
a determining unit 602, configured to determine, if a ratio of the receiving rate to the sending rate calculated by the calculating unit is equal to a preset threshold, that the link quality of the first communication link is equal to a preset transmission quality;
the determining unit 602 is specifically configured to determine that the link quality of the first communication link is greater than the preset transmission quality if the ratio of the receiving rate to the sending rate calculated by the calculating unit is greater than the preset threshold.
Optionally, the determining unit 602 is specifically configured to periodically determine a sending rate of data to be transmitted.
The embodiment of the present application further provides a computer storage medium, which includes computer execution instructions, and when the computer execution instructions are executed on a computer, the computer is enabled to execute the data transmission method provided in the above embodiment.
The embodiment of the present application further provides a computer program, where the computer program may be directly loaded into the memory and contains a software code, and the computer program is loaded and executed by the computer to implement the data transmission method provided in the foregoing embodiment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in 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 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 above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A data transmission method is characterized in that the method is applied to a communication system comprising a first network device and a second network device, wherein the first network device and the second network device are both connected with a terminal; the data transmission method is applied to the first network equipment and comprises the following steps:
receiving data to be transmitted sent by core network equipment;
determining the receiving rate and the sending rate of the data to be transmitted;
determining link quality of a first communication link according to the receiving rate and the sending rate, wherein the first communication link is a link between the first network equipment and the terminal;
and if the link quality of the first communication link is less than the preset transmission quality, shunting the data to be transmitted to the second network equipment.
2. The data transmission method according to claim 1, further comprising, after said determining the link quality of the first communication link based on the receiving rate and the sending rate:
and if the link quality of the first communication link is greater than or equal to the preset transmission quality, transmitting the data to be transmitted only in the first network equipment.
3. The data transmission method according to claim 1 or 2, wherein determining the link quality of the first communication link based on the receiving rate and the sending rate comprises:
calculating the ratio of the receiving rate to the sending rate;
if the ratio of the receiving rate to the sending rate is smaller than a preset threshold value, determining that the link quality of the first communication link is smaller than a preset transmission quality;
if the ratio of the receiving rate to the sending rate is equal to the preset threshold, determining that the link quality of the first communication link is equal to the preset transmission quality;
and if the ratio of the receiving rate to the sending rate is greater than the preset threshold, determining that the link quality of the first communication link is greater than the preset transmission quality.
4. The data transmission method according to claim 1, wherein determining the sending rate of the data to be transmitted comprises:
and periodically determining the sending rate of the data to be transmitted.
5. A data transmission device is characterized in that the data transmission device is applied to a communication system comprising a first network device and a second network device, wherein the first network device and the second network device are both connected with a terminal; the data transmission device is applied to the first network equipment and comprises: a receiving unit, a determining unit and a processing unit;
the receiving unit is used for receiving data to be transmitted sent by core network equipment;
the determining unit is used for determining the receiving rate and the sending rate of the data to be transmitted received by the receiving unit;
the determining unit is further configured to determine, according to the receiving rate and the sending rate, a link quality of a first communication link, where the first communication link is a link between the first network device and the terminal;
the processing unit is configured to, if the link quality of the first communication link determined by the determining unit is less than a preset transmission quality, distribute the data to be transmitted to the second network device.
6. The data transmission apparatus of claim 5,
the processing unit is further configured to transmit the data to be transmitted only in the first network device if the link quality of the first communication link determined by the determining unit is greater than or equal to the preset transmission quality.
7. The data transmission apparatus according to claim 5 or 6, further comprising: a calculation unit;
the calculating unit is used for calculating the ratio of the receiving rate to the sending rate;
the determining unit is specifically configured to determine that the link quality of the first communication link is less than a preset transmission quality if the ratio of the receiving rate to the sending rate calculated by the calculating unit is less than a preset threshold;
the determining unit is specifically configured to determine that the link quality of the first communication link is equal to a preset transmission quality if the ratio of the receiving rate to the sending rate calculated by the calculating unit is equal to the preset threshold;
the determining unit is specifically configured to determine that the link quality of the first communication link is greater than a preset transmission quality if the ratio of the receiving rate to the sending rate calculated by the calculating unit is greater than the preset threshold.
8. The data transmission apparatus of claim 5,
the determining unit is specifically configured to periodically determine the sending rate of the data to be transmitted.
9. A data transmission apparatus 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; the processor executes the computer-executable instructions stored by the memory when the data transfer device is operating to cause the data transfer device to perform the data transfer method of any of claims 1-4.
10. A computer storage medium comprising computer executable instructions which, when executed on a computer, cause the computer to perform the data transmission method of any one of claims 1 to 4.
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