CN103986560A - Data transmission method and data transmission device - Google Patents
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- CN103986560A CN103986560A CN201410245184.8A CN201410245184A CN103986560A CN 103986560 A CN103986560 A CN 103986560A CN 201410245184 A CN201410245184 A CN 201410245184A CN 103986560 A CN103986560 A CN 103986560A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005538 encapsulation Methods 0.000 claims description 36
- 238000012795 verification Methods 0.000 claims description 9
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Abstract
The invention provides a data transmission method and a data transmission device. The data transmission method comprises the following steps: responding to received data and properties of networks, which correspond to the data and are used for transmitting the data, encapsulating the network properties and the data into general physical frames by using a preset general data structure, and further transmitting the general physical frames by using the networks corresponding to the network properties. The data transmission method has the advantages that the preset general data structure is used for generating the unified, synergic and general physical frames which are supplied to a transmission layer, the general physical frames are used for shielding heterogeneous details of a physical layer during network integration and providing unified data formats for an upper layer, so that the deep integration of heterogeneous networks is achieved, and the seamless connection is realized truly, and thus the integration network avoids data loss and the transmission delay of data in a data transmission process is reduced.
Description
Technical field
The application relates to Network Convergence Technology field, particularly relates to a kind of data transmission method and device.
Background technology
Along with the fast development of mobile communication, type of service and user's request are occurring to change, and conventionally need high signal quality that high speed business is provided, and then meet the demand of user to network, and therefore, Network Convergence Technology arises at the historic moment.
Being undertaken in data transmission procedure by existing UNE, conventionally can cause following problem:
(1), in the time that UNE is heterogeneous network, although this heterogeneous network can be to a certain extent for user provides more optimal data transmission environments, but, in the time carrying out transfer of data by heterogeneous network, being switched to from network A the process of network B (that is: vertically switch), due to each network distinctive link layer separately, the technology such as MAC layer, conventionally need the link in network A to be switched, set up in network B and enter new link, and in this process, on the link being connected with network A, in all link layer buffering areas, all need etc. pending, and then cause loss of data in buffering area in network A.
(2), when UNE is while realizing by technology such as unified link layer framework or unified MAC frameworks; in data transmission procedure; although reduced to a certain extent the loss of data phenomenon in the time of vertical switching; but; realize in data transmission procedure by these two kinds of UNEs; all need to increase functional entity, by being mapped to from the requirement on upper strata in newly-increased layer, conventionally can virtually increase data transmission delay.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of data transmission method and device, carries out in data transmission procedure to realize at UNE, avoids loss of data, reduces data transmission delay.
To achieve these goals, the technical scheme that the embodiment of the present application provides is as follows:
A kind of data transmission method, comprising:
The data that receive of response and corresponding with these data, for transmitting the network of network attribute of these data, utilize the common data structure that sets in advance that described network attribute and data encapsulation are become to general physical frame, and utilize general physical frame described in the Internet Transmission corresponding with described network attribute;
Described common data structure comprises: general frame head and net load district, and wherein, described general frame head is used for encapsulating described network attribute, and described net load district is used for encapsulating described data.
Preferably, each property value that described network attribute is carried, is encapsulated in the relevant position of described general frame head, and by described data encapsulation in described net load district, generate general physical frame.
Preferably, described common data structure also comprises PLI, and described PLI is used to specify the byte number of described net load district encapsulation of data.
Preferably, described common data structure also comprises HEC, and described HEC is for carrying out verification to described general physical frame.
Preferably, described general frame head comprises PTI, TPI and Port Id, wherein,
Described PTI is used to indicate the net load type of the described data of transmission;
Described TPI is used to indicate the physical layer transmission attribute of the described data of transmission;
Described Port Id is used to indicate the transmit port of the described data of transmission.
Preferably, described PTI comprises: a PTI indicating bit, the 2nd PTI indicating bit and the 3rd PTI indicating bit, wherein,
A described PTI indicating bit is used to indicate the frame channel physical layer type of the described data of transmission;
Described the 2nd PTI indicating bit is used to indicate the physical layer attributes of the described data of transmission;
Described the 3rd PTI indicating bit is used to indicate the physical layer modulation type of the described data of transmission.
Preferably, described TPI comprises: a TPI indicating bit, the 2nd TPI indicating bit, the 3rd TPI indicating bit and the 4th TPI indicating bit, wherein,
A described TPI indicating bit is used to indicate the physical layer transmission frequency separation of the described data of transmission;
Described the 2nd TPI indicating bit is used to indicate the physical layer power level interval of the described data of transmission;
Described the 3rd TPI indicating bit is used to indicate the physical layer bandwidth interval of the described data of transmission;
Described the 4th TPI indicating bit is used to indicate the physical layer rate interval of the described data of transmission.
A kind of data transmission device, comprising: encapsulation unit and transmission unit, wherein,
Described encapsulation unit for respond the data that receive and corresponding with these data, for transmitting the network of network attribute of these data, utilize the common data structure setting in advance that described network attribute and data encapsulation are become to general physical frame;
Described transmission unit is connected with described encapsulation unit, for utilizing general physical frame described in the Internet Transmission corresponding with described network attribute;
Described common data structure comprises: general frame head and net load district, and wherein, described general frame head is used for encapsulating described network attribute, and described net load district is used for encapsulating described data.
Preferably, described common data structure also comprises PLI, and described PLI is used to specify the byte number of described net load district encapsulation of data.
Preferably, described common data structure also comprises HEC, and described HEC is for carrying out verification to described general physical frame.
The application provides a kind of data transmission method and device, the data that the method receives by response and corresponding with these data, for transmitting the network of network attribute of these data, network attribute and data encapsulation are become general physical frame by the common data structure that utilization sets in advance, and then realize and utilize the network corresponding with network attribute to complete the transmission to this general physical frame, the application is by this common data structure setting in advance, generate and provide unified to transport layer, cooperation, general general physical frame, physical layer isomery details while utilizing this general physical frame shielding network integration, for upper strata provides unified data format, and then the degree of depth that reaches heterogeneous network merges, really accomplish seamless link, carry out in data transmission procedure at UNE making, avoid loss of data, reduce data transmission delay.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of data transmission method flow chart that Fig. 1 provides for the embodiment of the present application one;
The detailed structure schematic diagram of a kind of common data structure that Fig. 2 provides for the embodiment of the present application one;
The detailed structure schematic diagram of a kind of general frame head that Fig. 3 provides for the embodiment of the present application one;
The structural representation of a kind of data transmission device that Fig. 4 provides for the embodiment of the present application two;
The detailed structure schematic diagram of a kind of common data structure that Fig. 5 provides for the embodiment of the present application three.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all should belong to the scope of the application's protection.
Embodiment mono-:
A kind of data transmission method flow chart that Fig. 1 provides for the embodiment of the present application one.
As shown in Figure 1, the method comprises:
S101, the data that receive of response and corresponding with these data, for transmitting the network of network attribute of these data, utilize the common data structure setting in advance that network attribute and data encapsulation are become to general physical frame.
In the embodiment of the present application, set in advance common data structure, this common data structure comprises: general frame head and net load district, and wherein, general frame head is used for encapsulating network attribute, and net load district is for encapsulation of data.
In the embodiment of the present application, first, receive data that user sends and corresponding with these data, for transmitting the network of network attribute of these data.When receive data and corresponding with these data, for transmitting after the network of network attribute of these data, can these data that receive of response and corresponding with these data, for transmitting the network of network attribute of these data, this network attribute and data encapsulation are become general physical frame by the common data structure that utilization sets in advance, wherein, encapsulation process is as follows: each property value that network attribute is carried, be encapsulated in the relevant position of general frame head, and encapsulate data in net load district, generate general physical frame.
S102, the utilization network transmission common physical frame corresponding with network attribute.
In the embodiment of the present application, when the common data structure that utilization sets in advance becomes network attribute and data encapsulation after general physical frame, need to utilize the network corresponding with this network attribute to transmit this general physical frame.
The detailed structure schematic diagram of a kind of common data structure that Fig. 2 provides for the embodiment of the present application one.
As shown in Figure 2, this common data structure comprises: general frame head 11 and net load district 12, and wherein, general frame head 11 is for encapsulating network attribute, and net load district 12 is for encapsulation of data.
The detailed structure schematic diagram of a kind of general frame head that Fig. 3 provides for the embodiment of the present application one.
As shown in Figure 3, this general frame head comprises: PTI (Payload Type Indicator net load type identification) 21, TPI (Transport property Indicator transmission property mark) 22 and Port Id (port Identification port-mark) 23, wherein, PTI21 is used to indicate transmission data
Net load type.
In the embodiment of the present application, this PTI21 comprises: a PTI indicating bit, the 2nd PTI indicating bit and the 3rd PTI indicating bit, wherein,
The one PTI indicating bit is used to indicate the frame channel physical layer type of transmission data.
The 2nd PTI indicating bit is used to indicate the physical layer attributes of transmission data.
The 3rd PTI indicating bit is used to indicate the physical layer modulation type of transmission data.
In the embodiment of the present application, do not limit for the order of a PTI indicating bit, the 2nd PTI indicating bit and the 3rd PTI indicating bit in PTI21, inventor can according to oneself arrange arbitrarily these three instruction bit positions.
TPI22 is used to indicate the physical layer transmission attribute of transmission data.
TPI22 comprises: a TPI indicating bit, the 2nd TPI indicating bit, the 3rd TPI indicating bit and the 4th TPI indicating bit, wherein,
The one TPI indicating bit is used to indicate the physical layer transmission frequency separation of transmission data.
The 2nd TPI indicating bit is used to indicate the physical layer power level interval of transmission data.
The 3rd TPI indicating bit is used to indicate the physical layer bandwidth interval of transmission data.
The 4th TPI indicating bit is used to indicate the physical layer rate interval of transmission data.
In the embodiment of the present application, do not limit for the order of a TPI indicating bit, the 2nd TPI indicating bit, the 3rd TPI indicating bit and the 4th TPI indicating bit in TPI22, inventor can according to oneself arrange arbitrarily these three instruction bit positions.
Port Id23 is used to indicate the transmit port of transmission data.
In the embodiment of the present application, do not limit for the order of PTI21, TPI22 in this general frame head and Port Id23, inventor can according to oneself arrange arbitrarily these three instruction bit positions.
Further, in the common data structure as shown in Figure 2 providing in the embodiment of the present application one, also comprise: PLI (Payload Length Indicator net load length mark), this PLI is used to specify the byte number of net load district encapsulation of data.
In the embodiment of the present application, PLI can be used to refer to the byte number of net load district encapsulation of data, also: this net load district byte length, by this PLI, the frame length that transmits every frame can be predicted, at this, also this PLI can be regarded as to a pointer, be used to refer to and find the general frame head of next general physical frame.
In the embodiment of the present application, preferred, it is 12bits that this PLI is set, and the maximum byte in net load district is 4095 bytes, prescribes a time limit when transmission data exceed on this, adopts burst transmission mechanism.
Further, in the common data structure as shown in Figure 2 providing in the embodiment of the present application one, also comprise: HEC (control of Header Field Check type field error code), this HEC is for carrying out verification to general physical frame.
In the embodiment of the present application, the general physical frame that this HEC is used for generating carries out verification, as: the general frame head in the general physical frame of this generation is carried out to EDC error detection and correction etc.
The application provides a kind of data transmission method, the data that the method receives by response and corresponding with these data, for transmitting the network of network attribute of these data, network attribute and data encapsulation are become general physical frame by the common data structure that utilization sets in advance, and then realize and utilize the network corresponding with network attribute to complete the transmission to this general physical frame, the application is by this common data structure setting in advance, generate and provide unified to transport layer, cooperation, general general physical frame, physical layer isomery details while utilizing this general physical frame shielding network integration, for upper strata provides unified data format, and then the degree of depth that reaches heterogeneous network merges, really accomplish seamless link, carry out in data transmission procedure at UNE making, avoid loss of data, reduce data transmission delay.
Embodiment bis-:
The structural representation of a kind of data transmission device that Fig. 4 provides for the embodiment of the present application two.
As shown in Figure 4, this device comprises: encapsulation unit 31 and transmission unit 32, wherein,
Encapsulation unit 31 for respond the data that receive and corresponding with these data, for transmitting the network of network attribute of these data, utilize the common data structure setting in advance that network attribute and data encapsulation are become to general physical frame.
Transmission unit 32 is connected with encapsulation unit 31, for utilizing the network transmission common physical frame corresponding with network attribute.
Common data structure comprises: general frame head and net load district, and wherein, general frame head is used for encapsulating network attribute, and net load district is for encapsulation of data.
Further, in the data transmission device as shown in Figure 4 providing in the embodiment of the present application two, common data structure also comprises: PLI, this PLI is used to specify the byte number of net load district encapsulation of data.
Further, in the data transmission device as shown in Figure 4 providing in the embodiment of the present application two, common data structure also comprises: HEC, this HEC is for carrying out verification to general physical frame.
The application provides a kind of data transmission device, this device comprises encapsulation unit and transmission unit, first, pass through encapsulation unit, the data that response receives and corresponding with these data, for transmitting the network of network attribute of these data, network attribute and data encapsulation are become general physical frame by the common data structure that utilization sets in advance, and then realize transmission unit, utilize the network corresponding with network attribute to complete the transmission to this general physical frame, the application is by this common data structure setting in advance, generate and provide unified to transport layer, cooperation, general general physical frame, physical layer isomery details while utilizing these general physical frame shielding two nets to merge, for upper strata provides unified data format, and then the degree of depth that reaches heterogeneous network merges, really accomplish seamless link, carry out in data transmission procedure at UNE making, avoid loss of data, reduce data transmission delay.
Embodiment tri-:
Understand for convenience the common data structure in the present invention program, be integrated into row with the photoelectricity network of visible ray network and wifi network now and illustrate:
First, the detailed structure schematic diagram that the embodiment of the present application three provides a kind of common data structure as shown in Figure 5 so that the understanding to following proposal.
In the embodiment of the present application, the common data structure setting in advance comprises: general frame head and net load district, general frame head comprises: PTI, TPI and Port Id.
In the embodiment of the present application, preferably, this PTI is used to indicate the net load type of transmission data, and this PTI is made up of 3 bit, each bit, as an indicating bit, forms 3 bit of this PTI respectively as a PTI indicating bit, the 2nd PTI indicating bit and the 3rd PTI indicating bit.
In the embodiment of the present application, preferred, a PTI indicating bit is used to indicate the frame channel physical layer type of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with a PTI indicating bit, represents visible light medium; The situation that is 1 by the numerical value corresponding with a PTI indicating bit, represents wifi medium.
In the embodiment of the present application, preferred, the 2nd PTI indicating bit is used to indicate the physical layer attributes of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with the 2nd PTI indicating bit, represents transmission of visible light; The situation that is 1 by the numerical value corresponding with the 2nd PTI indicating bit, represents wifi transmission.
In the embodiment of the present application, preferred, the 3rd PTI indicating bit is used to indicate the physical layer modulation type of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with the 3rd PTI indicating bit, represents OFDM+MIMO modulation system; The situation that is 1 by the numerical value corresponding with the 3rd PTI indicating bit, represents OFDM+DSS modulation system.
In the embodiment of the present application, preferably, this TPI is used to indicate the physical layer transmission attribute of transmission data, and this PTI is made up of 4 bit, each bit, as an indicating bit, forms 4 bit of this TPI respectively as a TPI indicating bit, the 2nd TPI indicating bit, the 3rd TPI indicating bit and the 4th TPI indicating bit.
In the embodiment of the present application, preferred, a TPI indicating bit is used to indicate the physical layer transmission frequency separation of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with a TPI indicating bit, represents transmission of visible light frequency separation; The situation that is 1 by the numerical value corresponding with a TPI indicating bit, represents wifi transmission frequency interval.
In the embodiment of the present application, preferred, the 2nd TPI indicating bit is used to indicate the physical layer power level interval of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with the 2nd TPI indicating bit, represents transmission of visible light power interval; The situation that is 1 by the numerical value corresponding with the 2nd TPI indicating bit, represents wifi through-put power interval.
In the embodiment of the present application, preferred, the 3rd TPI indicating bit is used to indicate the physical layer bandwidth interval of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with the 3rd TPI indicating bit, represents transmission of visible light bandwidth interval; The situation that is 1 by the numerical value corresponding with the 3rd TPI indicating bit, represents wifi transmission bandwidth interval.
In the embodiment of the present application, preferred, the 4th TPI indicating bit is used to indicate the physical layer rate interval of transmission data, and wherein, the situation that can be 0 by the numerical value corresponding with the 4th TPI indicating bit, represents transmission of visible light speed interval; The situation that is 1 by the numerical value corresponding with the 4th TPI indicating bit, represents wifi transmission rate interval.
In the embodiment of the present application, preferred, this Port Id is used to indicate the transmit port of transmission data, and this PTI is made up of 1 bit, and the situation that is 0 by the numerical value corresponding with this bit, represents visible ray network transmit port; The situation that is 1 by the numerical value corresponding with this bit, represents wifi network emission port.
Further, in the common data structure that the embodiment of the present application provides as shown in Figure 5, also comprise: PLI.
In the embodiment of the present application, preferred, this PLI is used to refer to the byte number of net load district encapsulation of data, also: this net load district byte length, by this PLI, the frame length that transmits every frame can be predicted, at this, also this PLI can be regarded as to a pointer, be used to refer to and find the general frame head of next general physical frame, and preferred, it is 12bits that this PLI is set, and the maximum byte in net load district is 4095 bytes, prescribe a time limit when transmission data exceed on this, adopt burst transmission mechanism.
Further, as shown in Figure 5, in the common data structure that the embodiment of the present application provides, also comprise: HEC.
In the embodiment of the present application, preferably, this HEC is for carrying out verification to general physical frame, and this HEC is 6bits, can be with realizing error code indication information by this HEC, general frame head EDC error detection and correction etc., and preferred, in the embodiment of the present application, after this HEC is positioned at PLI and general frame head in common data structure, before net load district, so that realize more accurately and efficiently the verification to general physical frame.
The embodiment of the present application is fused to example with photoelectricity network, the common data structure that the application is provided is introduced, the common data structure that this programme is provided is more clear, be convenient to understand, and when the network that the embodiment of the present application merges at photoelectricity carries out transfer of data, can be by this common data structure setting in advance, generate and provide unified to transport layer, cooperation, general general physical frame, utilize this general physical frame shielded from light electric network physical layer isomery details, for upper strata provides unified data format, and then the degree of depth that reaches photoelectricity network merges, really accomplish seamless link, carry out in data transmission procedure at UNE making, avoid loss of data, reduce data transmission delay.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates referring to method part.
Below be only the application's preferred implementation, make those skilled in the art can understand or realize the application.To be apparent to one skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a data transmission method, is characterized in that, comprising:
The data that receive of response and corresponding with these data, for transmitting the network of network attribute of these data, utilize the common data structure that sets in advance that described network attribute and data encapsulation are become to general physical frame, and utilize general physical frame described in the Internet Transmission corresponding with described network attribute;
Described common data structure comprises: general frame head and net load district, and wherein, described general frame head is used for encapsulating described network attribute, and described net load district is used for encapsulating described data.
2. method according to claim 1, is characterized in that, each property value that described network attribute is carried is encapsulated in the relevant position of described general frame head, and by described data encapsulation in described net load district, generate general physical frame.
3. method according to claim 2, is characterized in that, described common data structure also comprises net load length mark PLI, and described PLI is used to specify the byte number of described net load district encapsulation of data.
4. method according to claim 3, is characterized in that, described common data structure also comprises type field error code control HEC, and described HEC is for carrying out verification to described general physical frame.
5. method according to claim 4, is characterized in that, described general frame head comprises net load type identification PTI, transmission property mark TPI and port-mark Port Id, wherein,
Described PTI is used to indicate the net load type of the described data of transmission;
Described TPI is used to indicate the physical layer transmission attribute of the described data of transmission;
Described Port Id is used to indicate the transmit port of the described data of transmission.
6. method according to claim 5, is characterized in that, described PTI comprises: a PTI indicating bit, the 2nd PTI indicating bit and the 3rd PTI indicating bit, wherein,
A described PTI indicating bit is used to indicate the frame channel physical layer type of the described data of transmission;
Described the 2nd PTI indicating bit is used to indicate the physical layer attributes of the described data of transmission;
Described the 3rd PTI indicating bit is used to indicate the physical layer modulation type of the described data of transmission.
7. method according to claim 6, is characterized in that, described TPI comprises: a TPI indicating bit, the 2nd TPI indicating bit, the 3rd TPI indicating bit and the 4th TPI indicating bit, wherein,
A described TPI indicating bit is used to indicate the physical layer transmission frequency separation of the described data of transmission;
Described the 2nd TPI indicating bit is used to indicate the physical layer power level interval of the described data of transmission;
Described the 3rd TPI indicating bit is used to indicate the physical layer bandwidth interval of the described data of transmission;
Described the 4th TPI indicating bit is used to indicate the physical layer rate interval of the described data of transmission.
8. a data transmission device, is characterized in that, comprising: encapsulation unit and transmission unit, wherein,
Described encapsulation unit for respond the data that receive and corresponding with these data, for transmitting the network of network attribute of these data, utilize the common data structure setting in advance that described network attribute and data encapsulation are become to general physical frame;
Described transmission unit is connected with described encapsulation unit, for utilizing general physical frame described in the Internet Transmission corresponding with described network attribute;
Described common data structure comprises: general frame head and net load district, and wherein, described general frame head is used for encapsulating described network attribute, and described net load district is used for encapsulating described data.
9. device according to claim 8, is characterized in that, described common data structure also comprises PLI, and described PLI is used to specify the byte number of described net load district encapsulation of data.
10. device according to claim 9, is characterized in that, described common data structure also comprises HEC, and described HEC is for carrying out verification to described general physical frame.
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| CN110650546A (en) * | 2019-09-29 | 2020-01-03 | Tcl移动通信科技（宁波）有限公司 | File transmission method, device, storage medium and terminal |
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| CN101877691B (en) * | 2009-04-29 | 2013-11-06 | 高通创锐讯企业管理(上海)有限公司 | Encapsulation and decapsulation method of physical layer frame in EOC (Ethernet over Coax) network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016029362A1 (en) * | 2014-08-26 | 2016-03-03 | 华为技术有限公司 | Network communication method and apparatus |
| US10499261B2 (en) | 2014-08-26 | 2019-12-03 | Huawei Technologies Co., Ltd. | Network communication method and apparatus |
| CN105187332A (en) * | 2015-08-05 | 2015-12-23 | 武汉森岩科技有限公司 | Multi-source data transmission method based on Zigbee network |
| CN105187332B (en) * | 2015-08-05 | 2019-04-02 | 武汉森岩科技有限公司 | Multi-source data transmission method based on Zigbee network |
| CN110650546A (en) * | 2019-09-29 | 2020-01-03 | Tcl移动通信科技（宁波）有限公司 | File transmission method, device, storage medium and terminal |
| CN110650546B (en) * | 2019-09-29 | 2023-08-15 | Tcl移动通信科技（宁波）有限公司 | File transmission method, device, storage medium and terminal |
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