CN110213020A - Data transmission method, terminal, system and device based on bluetooth peripheral hardware - Google Patents
Data transmission method, terminal, system and device based on bluetooth peripheral hardware Download PDFInfo
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- CN110213020A CN110213020A CN201910467547.5A CN201910467547A CN110213020A CN 110213020 A CN110213020 A CN 110213020A CN 201910467547 A CN201910467547 A CN 201910467547A CN 110213020 A CN110213020 A CN 110213020A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
This application involves Bluetooth technology field, data transmission method, terminal, system and device based on bluetooth peripheral hardware are specifically disclosed, this method comprises: receiving at least one data packet that bluetooth peripheral hardware is sent, wherein include data to be transmitted in data packet；Data packet is verified；After data packet verifies successfully, data to be transmitted is verified；When data to be transmitted verifies successfully, data transmission procedure terminates.By the above-mentioned means, the application can ensure the accuracy of data communication, and the waiting time is reduced, improve data transfer rate.
Description
Technical field
This application involves Bluetooth technology fields, more particularly to the data transmission method based on bluetooth peripheral hardware, terminal, system
And device.
Background technique
Bluetooth is a kind of wireless technology standard, it can be achieved that fixed equipment, mobile device and building personal mobile device and building
Short-range data exchange (using the UHF radio wave of the ISM band of 2.4-2.485GHz) between space personal area network.With
The development of Bluetooth wireless technology, 4.0 version of bluetooth realizes low-power consumption on the basis of traditional bluetooth technology, so that bluetooth
Equipment can extremely low power consumption work, pushed bluetooth technology with low power consumption intelligent wearable device, mobile terminal, movement note
The extensive use in the fields such as recording apparatus.
Summary of the invention
Based on this, it is necessary to provide a kind of data transmission method based on bluetooth peripheral hardware, terminal, system and device, energy
It enough ensures the accuracy of data communication, and reduces the waiting time, improve data transfer rate.
The application provides a kind of data transmission method based on bluetooth peripheral hardware, sends this method comprises: receiving bluetooth peripheral hardware
At least one data packet, wherein in data packet include data to be transmitted；Data packet is verified；Data packet verification at
After function, data to be transmitted is verified；When data to be transmitted verifies successfully, data transmission procedure terminates.
The application provides a kind of terminal, comprising: processor, telecommunication circuit and memory, telecommunication circuit, memory difference
Processor is coupled, processor controls itself and telecommunication circuit, memory at work to realize such as the step in the above method.
The application provides a kind of data transmission system, which includes: mobile terminal, and mobile terminal is such as above-mentioned end
End；Bluetooth peripheral hardware, with mobile terminal bluetooth connection.
The application provides a kind of device with store function, is stored with program data, program data can be performed with
It realizes such as the step in the above method.
The beneficial effect of the application is: being in contrast to the prior art, the application receives bluetooth peripheral hardware and sends at least
One data packet, wherein include data to be transmitted in data packet；Data packet is verified；It is right after data packet verifies successfully
Data to be transmitted is verified；When data to be transmitted verifies successfully, data transmission procedure terminates, since client can be to each
Data packet and whole group data are verified respectively, after each data packet and whole group data verify successfully, could be completed
Data packet transmission, can ensure that the accuracy of data communication, each reported data without waiting for client bluetooth module
It responds, reduces the waiting time, improve data transfer rate.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the flow diagram of data transmission method one embodiment of the application based on bluetooth peripheral hardware；
Fig. 2 is the flow diagram of step S20 in Fig. 1；
Fig. 3 is the flow diagram of step S30 in Fig. 1；
Fig. 4 is the flow diagram of another embodiment of data transmission method of the application based on bluetooth peripheral hardware；
Fig. 5 is the flow diagram of the another embodiment of data transmission method of the application based on bluetooth peripheral hardware；
Fig. 6 is the flow diagram of data transmission method a further embodiment of the application based on bluetooth peripheral hardware；
Fig. 7 is the flow diagram of data transmission method a further embodiment of the application based on bluetooth peripheral hardware；
Fig. 8 is the structural schematic diagram of the application terminal；
Fig. 9 is the structural schematic diagram of the application terminal；
Figure 10 is the structural schematic diagram for the device that the application has store function.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, rather than whole embodiments.Based on this
Embodiment in application, those of ordinary skill in the art are obtained every other under the premise of not making creative labor
Embodiment shall fall in the protection scope of this application.
In the prior art, in the state of low-power consumption, the data volume that single data packet is transmitted is restricted bluetooth equipment,
Cause data communication time long.For bluetooth low energy device in normal data interaction, reporting every time for data all needs to wait for visitor
Family end bluetooth module is responded, and is caused the longer waiting time, is caused rate that can not be promoted.Based on this, the application provides a kind of base
In the data transmission method of bluetooth peripheral hardware.
Refering to fig. 1, Fig. 1 is the flow diagram of data transmission method one embodiment of the application based on bluetooth peripheral hardware,
Method includes the following steps:
S10: at least one data packet that bluetooth peripheral hardware is sent is received.
Specifically, low-power consumption bluetooth (Bluetooth Low Energy, BLE) technology is to aim to set using the terminal of battery
A kind of data transmission technology of standby design, has the advantages that low in energy consumption, and is widely used in mobile phone, laptop, PAD etc.
Data transmission between terminal device and bluetooth peripheral hardware.It wherein, include data to be transmitted in data packet.Mobile terminal receives bluetooth
At least one data packet that peripheral hardware is sent.It is during being carried out data transmission using low-power consumption bluetooth, by counting in this step
The data to be transmitted of pre-transmission is split according to mobile terminal, obtains at least one data packet.Specifically, therein mobile whole
End can be the terminal device with low-power consumption bluetooth data-transformation facility, such as mobile phone, PAD, laptop, and data are mobile
Terminal can be bluetooth peripheral hardware, bluetooth peripheral hardware therein can for smartwatch, intelligent glasses, remote controler etc. it is various can with it is upper
State the equipment that terminal device carries out the transmission of low-power consumption bluetooth data.
Terminal device receives at least one self-defining data packet that bluetooth peripheral hardware is sent, in the data packet of self-defining data packet
Hold corresponding with one of property attribute of low-power consumption bluetooth data service.
On the basis of the above embodiments, self-defining data packet further includes data type, in data types to express data packet
The type of appearance, before sending at least one self-defining data packet to client, further includes: the data type in self-defining data packet
Content, and data type is superimposed upon to the front end of packet content.Self-defining data packet can also include origin identification, data
Data to be transmitted can be divided at least one when carrying out data to be transmitted transmission by packet length and package identification, this step
A data packet.It can be with the data volume in the quantity and data packet of self-defining data packet.
S20: data packet is verified.
Specifically, mobile terminal can verify at least one data packet received, judge the first reception verification
Whether value and the first transmission check value are identical.
S30: after data packet verifies successfully, data to be transmitted is verified.
Specifically, can after data packet verifies successfully, such as receive check value it is identical as check value is sent when, mobile end
End can obtain data to be transmitted, and verify to data to be transmitted to parsing data packet, judge the second reception check value and
Whether the second transmission check value is identical.
S40: when data to be transmitted verifies successfully, data transmission procedure terminates.
Specifically, mobile terminal can obtain after data transfer task terminates and be stored in mobile terminal data library, file
Or the data to be transmitted in memory, the first data volume of corresponding local data is extracted from the data to be transmitted；Again from number
According to the second data volume for extracting data in packet.Wherein, the first data volume is compared with the second data volume.When the first data
When measuring consistent with the second data volume, when determining that data to be transmitted is verified successfully, data transmission procedure terminates.
It is in contrast to the prior art, the application receives at least one data packet that bluetooth peripheral hardware is sent, wherein data
It include data to be transmitted in packet；Data packet is verified；After data packet verifies successfully, data to be transmitted is verified；
When data to be transmitted verifies successfully, data transmission procedure terminates, since client can be to each data packet and whole group data
It is verified respectively, after each data packet and whole group data verify successfully, data packet transmission could be completed, can be ensured
The accuracy of data communication, each reported data without waiting for the response of client bluetooth module, reduce the waiting time, mention
High data rate.
Referring to Fig.2, Fig. 2 is the flow diagram of step S20 in Fig. 1, in one embodiment, step S20 includes following
Step:
S21: the first verification packet that bluetooth peripheral hardware is sent is received.
Specifically, bluetooth peripheral hardware sends the first verification packet to mobile terminal, and the first verification packet may include following information: packet
At least one of type information, packet serial number information, packet check information, packet start information, packet termination message or bag data information.
The different packet of classification can be distinguished using Packet type information, such as the first verification packet or data packet.Packet serial number information is used for reference numerals
According to the position of packet, for distinguishing the data packet retransmitted.Whether packet check information is correct for verifying package informatin, guarantees package informatin
Integrality and accuracy, such as even-odd check or length check.Packet start information and packet termination message are respectively used to instruction packet
Beginning ending.Bag data information is for saving the first information to be transmitted of verification packet, the data packet received such as mobile terminal
Length.
S22: verify data packet is to obtain the first verification result.
Specifically, for mobile terminal verify data packet to obtain the first verification result, the first verification result may include as follows
Information: in Packet type information, packet serial number information, packet check information, packet start information, packet termination message or bag data information extremely
Few one kind.
S23: response the first verification packet judges whether the first verification packet is consistent with the first verification result.
If consistent, enter S24.
S24: data packet verifies successfully.
By the above-mentioned means, carrying out data check to each data packet, the accuracy of data communication can be ensured.
It is the flow diagram of step S30 in Fig. 1 refering to Fig. 3, Fig. 3, in one embodiment, includes: to step S30
S31: determine whether data packet is sent.
Specifically, determine whether data packet is sent in mobile terminal.If so, into S32.
After repeating above-mentioned steps S10 and S20 more times, all data packets are all sent to mobile terminal.At this point, mobile
Terminal merges the data packet received, obtains data to be transmitted, while can be according to obtained data to be transmitted again
Crc value is calculated, carries out CRC check, if verifying successfully, otherwise transmission success transmits data to be transmitted again.It is included in data
And in the process, if there is zero-filled data packet, then zero-filled data packet can be given up according to the size of data to be transmitted.
S32: the second verification packet that bluetooth peripheral hardware is sent is received.
Wherein, data length and data check code comprising data to be transmitted in the second verification packet.
Specifically, in the case where mobile terminal connects bluetooth peripheral hardware, the request of data high-speed transparent transmission is initiated by mobile terminal,
Bluetooth peripheral hardware returns to the second verification packet to mobile terminal, and the second verification packet may include following information: the data of data to be transmitted
Length and data check code.The data length of data to be transmitted includes: transparent data total length and data packet maximum length.
S33: verifying the data to be transmitted in all data packets, to obtain the second verification result.
Wherein, the second verification result is the data length and data check code of final data.
Specifically, mobile terminal merges all data packets received after having received all data packets, obtains
Data to be transmitted.This step is to ensure that each data packet for being divided into data to be transmitted is all properly received, then to reception
To all data packets merge, obtain final data to be transmitted.Mobile terminal carries out school to final data to be transmitted
It tests, to obtain the data length and data check code of final data to be transmitted.
S34: response the second verification packet judges whether the second verification packet is consistent with the second verification result.
If consistent, enter S35.
S35: data to be transmitted verifies successfully.
By the above-mentioned means, carrying out data check to data to be transmitted, the accuracy of data communication can be ensured.Together
When, the second verification packet is sent after data packet is sent, and guarantees the integrality of two-way verification.
It is the process signal of another embodiment of data transmission method of the application based on bluetooth peripheral hardware refering to Fig. 4, Fig. 4
Figure, before step S30, this method further include:
S50: judge whether the first verification packet is consistent with the first verification result by bluetooth peripheral hardware.
If inconsistent, enter S60.
S60: judge whether the repetition transmission times of data packet is more than or equal to preset times.
If it is not, then entering S70.
Specifically, preset times can be for three times, and the repetition transmission times of data packet is more than or equal to three times, it may be considered that
Single data packet verifies failure three times, then transmits failure.
S70: it repeats to send data packet by bluetooth peripheral hardware.
If the repetition transmission times of data packet is less than three times, repeats to send data packet by bluetooth peripheral hardware, verify again
Data packet.
It is the process signal of the another embodiment of data transmission method of the application based on bluetooth peripheral hardware refering to Fig. 5, Fig. 5
Figure, in one embodiment, after step S50, this method further include:
If consistent, enter S80.
S80: determine whether data packet is sent.
Specifically, mobile terminal determines whether data packet is sent, if it is not, then entering S90.
S90: next data packet is sent by bluetooth peripheral hardware.
Specifically, mobile terminal needs to send next data by bluetooth peripheral hardware when not received all data packets
Packet, until all data packets are sent.
It is the process signal of data transmission method a further embodiment of the application based on bluetooth peripheral hardware refering to Fig. 6, Fig. 6
Figure, in one embodiment, before step S10, this method further include:
S110: data transfer request is sent.
Specifically, after establishing the connection relationship of mobile terminal and bluetooth peripheral hardware, mobile terminal sends data to bluetooth peripheral hardware
Transmission request.
S120: the confirmation signal generated after the transmission request of bluetooth peripheral hardware response data is received by the first channel.
Wherein, step S10 includes: to receive at least one data packet by second channel.
Specifically, mutually independent first channel and second channel are established, the response of bluetooth peripheral hardware is received by the first channel
The confirmation signal generated after data transfer request receives at least one data packet by second channel.
As a result, while carrying out data packet high-speed transparent transmission, the transmission of data transfer request will not influence.
It is the process signal of data transmission method a further embodiment of the application based on bluetooth peripheral hardware refering to Fig. 7, Fig. 7
Figure, in one embodiment, this method further comprises:
S130: a predetermined protocol is provided.
Specifically, for security consideration, while data format has also been standardized, a predetermined protocol is provided.Predetermined protocol is
Refer to the data format protocol for being internally embedded formula exploitation and mobile terminal exploitation agreement.
S140: protocol specification is carried out to data packet according to predetermined protocol by bluetooth peripheral hardware.
Specifically, protocol specification is carried out to data packet according to predetermined protocol by bluetooth peripheral hardware.
S150: after receiving the data packet that bluetooth peripheral hardware is sent, parsing data packet according to predetermined protocol, to read
Take the data to be transmitted in data packet.
Specifically, mobile terminal receive bluetooth peripheral hardware send data packet after, according to predetermined protocol to data packet into
Row parsing, with the data to be transmitted in read data packet.
It is the structural schematic diagram of the application terminal refering to Fig. 8, Fig. 8.The application also provides a kind of terminal, and terminal 80 includes:
Processor 81, telecommunication circuit 82 and memory 83, telecommunication circuit 82, memory 83 are respectively coupled to processor 81, processor 81
Control itself and telecommunication circuit 82, memory 83 at work with realize such as in above embodiment based on bluetooth peripheral hardware
Step in data transmission method.
Telecommunication circuit 82 is used to receive at least one data packet of bluetooth peripheral hardware transmission, and memory 83 is for storing data
Packet.It wherein, include data to be transmitted in data packet.
Processor 81 is for verifying data packet.
After data packet verifies successfully, processor 81 is for verifying data to be transmitted.It is verified in data to be transmitted
When success, data transmission procedure terminates.
Wherein, telecommunication circuit 82 is used to receive the first verification packet of bluetooth peripheral hardware transmission.
Processor 81 is for verify data packet to obtain the first verification result.
Processor 81 is wrapped for responding the first verification, judges whether the first verification packet is consistent with the first verification result, if one
It causes, then data packet verifies successfully.
Wherein, processor 81 is for determining whether data packet is sent.
If so, receiving the second verification packet that bluetooth peripheral hardware is sent, wherein comprising data to be transmitted in the second verification packet
Data length and data check code.
Processor 81 is for verifying the data to be transmitted in all data packets, to obtain the second verification result,
In, the second verification result is the data length and data check code of final data.Memory 83 is for storing data to be transmitted.
Processor 81 is wrapped for responding the second verification, judges whether the second verification packet is consistent with the second verification result, if one
It causes, then data to be transmitted verifies successfully.
Wherein, telecommunication circuit 82 is for sending data transfer request.
Processor 81 is used to receive the confirmation signal generated after the transmission request of bluetooth peripheral hardware response data by the first channel.
Wherein, the step of receiving at least one data packet that bluetooth peripheral hardware is sent includes: to be received at least by second channel
One data packet.
Wherein, processor 81 is for providing a predetermined protocol.
Protocol specification is carried out to data packet according to predetermined protocol by bluetooth peripheral hardware.
After telecommunication circuit 82 is used to receive the data packet of bluetooth peripheral hardware transmission, processor 81 is used for according to predetermined protocol pair
Data packet is parsed, with the data to be transmitted in read data packet.
It should be noted that the device of present embodiment can execute the step in the above method, related content it is detailed
Illustrate to refer to above method part, it is no longer superfluous herein to chat.
It is the structural schematic diagram of the application terminal refering to Fig. 9, Fig. 9.The application also provides a kind of data transmission system 90, should
System 90 includes: mobile terminal 91 and bluetooth peripheral hardware 92, bluetooth peripheral hardware 92 and 91 bluetooth connection of mobile terminal.Mobile terminal 91 is
Such as the terminal 80 in above embodiment.
0, Figure 10 is the structural schematic diagram for the device that the application has store function refering to fig. 1.The application also provides one kind
Device 100 with store function, the device 100 are stored with program data 101, and program data 101 can be performed to realize
Such as the step in the data transmission method based on bluetooth peripheral hardware in above embodiment.The device with store function
100, such as: RAM, ROM, magnetic disk, tape, CD, flash memory, USB flash disk, mobile hard disk, storage card, memory stick, network server are deposited
Storage, network cloud storage etc..
The all or part of the steps in method that above-described embodiment is related to can be instructed by program relevant hardware come
It completes, the program can store in the storage medium that computer equipment can be read, for executing the various embodiments described above side
All or part of the steps described in method.The computer equipment, such as: personal computer, server, the network equipment, intelligent sliding
Dynamic terminal, smart home device, wearable intelligent equipment, vehicle intelligent equipment etc.；
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of data transmission method based on bluetooth peripheral hardware, which is characterized in that the described method includes:
Receive at least one data packet that the bluetooth peripheral hardware is sent, wherein include data to be transmitted in the data packet；
The data packet is verified；
After the data packet verifies successfully, the data to be transmitted is verified；
When the data to be transmitted verifies successfully, data transmission procedure terminates.
2. the method according to claim 1, wherein described the step of verifying to the data packet, includes:
Receive the first verification packet that the bluetooth peripheral hardware is sent；
The data packet is verified to obtain the first verification result；
The first verification packet is responded, judges whether the first verification packet is consistent with first verification result；
If consistent, the data packet is verified successfully.
3. the method according to claim 1, wherein the step of being verified to data to be transmitted packet
It includes:
Determine whether the data packet is sent；
If so, receiving the second verification packet that the bluetooth peripheral hardware is sent, wherein comprising described to be passed in the second verification packet
The data length and data check code of transmission of data；
The data to be transmitted in all data packets is verified, to obtain the second verification result, wherein described second tests
Demonstrate,prove the data length and data check code that result is final data；
The second verification packet is responded, judges whether the second verification packet is consistent with second verification result；
If consistent, the data to be transmitted is verified successfully.
4. the method according to claim 1, wherein in described the step of being verified to the data to be transmitted
Before, the method also includes:
Judge whether the first verification packet is consistent with first verification result by the bluetooth peripheral hardware；
If inconsistent, judge whether the repetition transmission times of the data packet is more than or equal to default time by the bluetooth peripheral hardware
Number；
If it is not, then repeating to send the data packet by the bluetooth peripheral hardware.
5. according to the method described in claim 4, it is described by the bluetooth peripheral hardware judge it is described first verification packet with it is described
After the whether consistent step of first verification result, which is characterized in that the method also includes:
If consistent, it is determined that whether the data packet is sent；
If it is not, then sending next data packet by the bluetooth peripheral hardware.
6. the method according to claim 1, wherein at least one described for receiving the bluetooth peripheral hardware and sending
Before the step of data packet, the method also includes:
Send data transfer request；
The bluetooth peripheral hardware, which is received, by the first channel responds the confirmation signal generated after the data transfer request；
Wherein, described the step of receiving at least one data packet that the bluetooth peripheral hardware is sent includes: to be received by second channel
At least one described data packet.
7. the method according to claim 1, wherein the method further includes:
One predetermined protocol is provided；
Protocol specification is carried out to the data packet according to the predetermined protocol by the bluetooth peripheral hardware；
After receiving the data packet that the bluetooth peripheral hardware is sent, the data packet is parsed according to predetermined protocol,
To read the data to be transmitted in the data packet.
8. a kind of terminal characterized by comprising processor, telecommunication circuit and memory, the telecommunication circuit described are deposited
Reservoir is respectively coupled to the processor, and the processor controls itself and the telecommunication circuit, the memory at work
To realize such as the step in any one of claim 1 to 7 the method.
9. a kind of data transmission system, which is characterized in that the system comprises:
Mobile terminal, the mobile terminal are terminal as claimed in claim 8；
Bluetooth peripheral hardware, with the mobile terminal bluetooth connection.
10. a kind of device with store function, which is characterized in that be stored with program data, described program data can be held
Row is to realize such as the step in any one of claim 1 to 7 the method.
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| CN110618396A (en) * | 2019-09-20 | 2019-12-27 | 国网浙江省电力有限公司电力科学研究院 | Electric meter verification method based on Bluetooth transmission |
| CN111419225A (en) * | 2020-04-09 | 2020-07-17 | 北京品驰医疗设备有限公司 | Electroencephalogram acquisition system based on Bluetooth separated architecture |
| CN111917531A (en) * | 2020-07-28 | 2020-11-10 | 厦门亿联网络技术股份有限公司 | Single-wire bidirectional communication system and communication method thereof |
| CN113381785A (en) * | 2021-06-09 | 2021-09-10 | 宁波奥克斯电气股份有限公司 | Equipment debugging method and device and Bluetooth equipment |
| CN113726912A (en) * | 2021-11-03 | 2021-11-30 | 深圳市信润富联数字科技有限公司 | Data synchronization method, system and storage medium between cloud end and edge end |
| CN115412890A (en) * | 2021-05-28 | 2022-11-29 | 中移物联网有限公司 | Data transmission method and device and terminal equipment |
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