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WO2018068570A1 - Procédé de transmission de données, appareil de transmission et appareil de réception - Google Patents

Procédé de transmission de données, appareil de transmission et appareil de réception Download PDF

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Publication number
WO2018068570A1
WO2018068570A1 PCT/CN2017/096899 CN2017096899W WO2018068570A1 WO 2018068570 A1 WO2018068570 A1 WO 2018068570A1 CN 2017096899 W CN2017096899 W CN 2017096899W WO 2018068570 A1 WO2018068570 A1 WO 2018068570A1
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WIPO (PCT)
Prior art keywords
data
transmission channel
signal
transmission
analog
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/096899
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English (en)
Chinese (zh)
Inventor
刘洪�
成转鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autel Robotics Co Ltd
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Autel Robotics Co Ltd
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Filing date
Publication date
Application filed by Autel Robotics Co Ltd filed Critical Autel Robotics Co Ltd
Publication of WO2018068570A1 publication Critical patent/WO2018068570A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
    • 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
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H04W12/106—Packet or message integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

Definitions

  • the embodiments of the present application relate to the field of communications technologies, and in particular, to a data transmission method, a transmitting device, and a receiving device.
  • wireless transmission such as WIFI, LTE, and DVB
  • WIFI wireless transmission
  • LTE Long Term Evolution
  • DVB wireless transmission
  • the measures taken generally jump to another one.
  • frequency hopping can be used to ensure data transmission, but the real-time performance of frequency hopping cannot be guaranteed.
  • image mosaic, data error and other issues which have a great impact on the user experience, and are implemented in the application layer when realizing data judgment and data merging.
  • the technical problem to be solved by the embodiments of the present application is to provide a data transmission method, a transmitting device, and a receiving device, which can solve the problem that the switching channel delay is large when the data is transmitted in the same frequency band and the data delay caused by the application layer is combined.
  • a technical solution adopted by the embodiment of the present application is to provide a data transmission method, including: receiving data; and transmitting data through a first transmission channel and a second transmission channel, where the first transmission channel is a first analog baseband and a first RF coupled to the first analog baseband
  • the second transmission channel is constructed by the second analog baseband and the second RF front end connected to the second analog baseband, wherein the first analog baseband and the first RF front end operate in the first frequency band, and the second analog baseband And the second RF front end operates in the second frequency band.
  • the transmitting the transmission data through the first transmission channel and the second transmission channel includes: replicating the data to generate a data copy; transmitting the data through the first transmission channel, and transmitting the data copy through the second transmission channel.
  • the cooperatively transmitting the data by using the first transport channel and the second transport channel includes:
  • the data includes the first divided data and the second divided data, wherein the second divided data is the core content of the data, the first divided data is data other than the core content in the data, and the capacity of the first divided data is greater than The capacity of the two-divided data;
  • the data transmission by the first transmission channel and the second transmission channel includes: encrypting the second transmission data packet according to a preset encryption algorithm; transmitting the first divided data through the first transmission channel, and The second split data is transmitted through the second transport channel.
  • another technical solution adopted by the embodiment of the present application is to provide a data transmission method, including: receiving data by using a first transmission channel and a second transmission channel, where the first transmission channel is first
  • the analog baseband is constructed with a first RF front end connected to the first analog baseband
  • the second transmission channel is constructed by a second analog baseband and a second RF front end connected to the second analog baseband, wherein the first analog baseband and the first An RF front end operates in the first frequency band, and the second analog baseband and the second RF front end operate in the second frequency band; according to the received data, the complete data is restored.
  • grouping the complete data includes: parsing the data, determining whether the data is correct; if the data is correct, determining the first received data; and processing the first received data.
  • the step of receiving data through the first transport channel and the second transport channel includes: receiving, by the first transport channel or the second transport channel, a determination signal, wherein the determining signal is used to determine from the first transport channel and the second transport channel a channel as a data transmission channel; in the determined data transmission signal Receive data on the track.
  • the data transmission method further includes: detecting, by using a transmission channel that is not transmitting data among the first transmission channel and the second transmission channel, whether there is an interference signal that interferes with the data transmission channel; if there is an interference signal, and receiving data by the data transmission channel When the packet loss rate is greater than the predetermined value, the data transmission channel is re-determined, and the determination signal is transmitted to the transmitting device, and the data is received on the re-determined data transmission channel.
  • the data transmission method further includes: decrypting data received from the second transmission channel according to a preset decryption algorithm, and restoring the complete data according to the received data, including: decrypting the obtained data and transmitting from the first The data received by the channel is combined into complete data.
  • an embodiment of the present application provides a transmitting apparatus, including: a digital baseband, a first analog baseband, a first radio frequency front end, a second analog baseband, and a second radio frequency front end, and the first analog baseband and the digital baseband respectively a first RF front-end connection, a second analog baseband connected to the digital baseband and the second RF front end, the first analog baseband and the first RF front end operating in the first frequency band, and the second analog baseband and the second RF front end operating in the second frequency band a first analog baseband and a first RF front end constructing a first transmission channel, a second analog baseband and a second RF front end constructing a second transmission channel; a digital baseband for receiving data and converting the data into a digital signal; The channel and the second transmission channel cooperate to convert the digital signal into an analog signal, and modulate the analog signal to a corresponding frequency band for transmission.
  • the digital signals are two groups, respectively a first digital signal and a second digital signal, wherein the first digital signal is generated according to the data, and the second digital signal is generated according to the copy of the data; the first transmission channel and the first The second transmission channel cooperates to convert the digital signal into an analog signal, and modulates the analog signal into a corresponding frequency band for transmission: the first transmission channel is used to convert the first digital signal into an analog signal, and the analog signal converted by the first digital signal is modulated to The first frequency channel is used for transmitting the second digital signal to the analog signal, and the analog signal converted by the second digital signal is modulated to the second frequency band for transmission.
  • the first transmission channel and the second transmission channel cooperate to convert the digital signal into an analog signal, and modulate the analog signal into a corresponding frequency band
  • the transmission includes: the first transmission channel is used for digital signal conversion analog signal, and is converted by the digital signal.
  • the analog signal is modulated to transmit on the first frequency band;
  • the second transmission channel is configured to detect whether there is an interference signal in the transmission space that interferes with the first transmission channel, if there is an interference signal, and the packet loss rate of the data received on the data transmission channel is greater than a predetermined value Transmitting data from the first transport channel to the second transport channel and transmitting to the receiving device to determine that the second transport channel is data The determination signal of the transmission channel.
  • the digital signals are two groups, respectively being a first digital signal and a second digital signal, wherein the second digital signal is generated according to core content in the data, and the second digital signal is based on content other than the core content in the data.
  • Generating the first transmission channel and the second transmission channel to convert the digital signal into an analog signal, and modulating the analog signal to the corresponding frequency band including: the first transmission channel is used to convert the first digital signal into an analog signal, which will be The analog signal obtained by converting a digital signal is modulated to be transmitted on the first frequency band; the first transmission channel is used for converting the second digital signal into an analog signal, and the analog signal converted by the second digital signal is modulated to be transmitted on the second frequency band.
  • an embodiment of the present application provides a receiving apparatus, including: a digital baseband, a first analog baseband, a first radio frequency front end, a second analog baseband, and a second radio frequency front end, and the first analog baseband and the digital baseband respectively a first RF front-end connection, a second analog baseband connected to the digital baseband and the second RF front end, the first analog baseband and the first RF front end operating in the first frequency band, and the second analog baseband and the second RF front end operating in the second frequency band a first analog baseband and a first RF front end construct a first transmission channel, and a second analog baseband and a second RF front end construct a second transmission channel; the first transmission channel and the second transmission channel are configured to receive an analog signal and convert the analog signal It is a digital signal; a digital baseband is used to restore complete data based on an analog signal.
  • the digital baseband is specifically configured to: parse the analog signal received by the first transmission channel and the second transmission channel as data, determine whether the data is correct; if the data is correct, determine the first received data; perform the first received data. deal with.
  • the digital baseband is configured to: receive the determination signal, wherein the determination signal is used to determine a channel from the first transmission channel and the second transmission channel as a data transmission channel; according to the determination signal, determine a data transmission channel of the transmission data, and according to The analog signal received by the data transmission channel generates complete data.
  • the digital baseband is further configured to detect, by using a transmission channel that is not transmitting data among the first transmission channel and the second transmission channel, whether there is an interference signal that interferes with the data transmission channel; if there is an interference signal, and when receiving the simulation through the data transmission channel
  • the packet loss rate of the signal is greater than a predetermined value, the data transmission channel is re-determined, and the determination signal is transmitted to the transmitting device, and the analog signal is received on the determined data transmission channel.
  • the data baseband generates two sets of data by using two sets of analog signals received by the first transport channel and the second transport channel, and combines the two sets of data into complete data.
  • the present application constructs the first and second transmission channels by using the first and second analog basebands and the first and second radio frequency front ends in the transmitting device, and Transmitting data by the cooperation between the first and second transmission channels, constructing the first and second transmission channels by using the first and second analog basebands in the receiving device and the first and second RF front ends, and by the first
  • the second transmission channel receives the data and restores the complete data, and transmits and receives the data through the analog baseband and the radio frequency front end in the physical layer, and also merges the data at the physical layer, thereby ensuring a small delay of the data transmission and improving
  • the efficiency of data transmission, and the use of the cooperation of two transmission channels to transmit data ensures the correctness of data transmission, and realizes the transmission of real-time data with the lowest redundancy design.
  • the data is transmitted by using two transmission channels to increase the spatial coexistence of the data, there is no limitation of the application scenario.
  • FIG. 1 is a schematic diagram of one application environment of a data transmission method provided by an embodiment of the present application
  • FIG. 2 is a flow chart of a first embodiment of a data transmission method according to the present application.
  • FIG. 3 is a first detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 4 is a second detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 5 is a third detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 6 is a fourth detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 7 is a flowchart of a second embodiment of a data transmission method according to the present application.
  • FIG. 8 is a first detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 9 is a second detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 10 is a third detailed flowchart of a first embodiment of a data transmission method according to the present application.
  • FIG. 11 is a schematic diagram of a first embodiment of a transmitting apparatus of the present application.
  • Figure 12 is a schematic diagram of a first embodiment of a receiving device of the present application.
  • the data transmission method provided by the embodiment of the present application is a method for wirelessly transmitting data by using two transmission channels, which includes: a data transmission method (a first embodiment of a data transmission method of the present application) and a data transmission method Corresponding data receiving method (a second embodiment of a data transmission method of the present application).
  • the first transmission channel formed by the first analog baseband and the first radio frequency front end and working in the first frequency band, and the second analog baseband and the second radio frequency front end are configured and work in the first
  • the second transmission channel of the second frequency band cooperates with the transmission (transmitting/receiving) data, which can improve the anti-interference ability of the data transmission and improve the coexistence of the data in the space, and is not limited by the application scenario.
  • the processing of the data is completed at the physical layer, thereby ensuring a small delay of data transmission and improving the efficiency of data transmission.
  • the data transmission method, the sending device, and the receiving device provided by the embodiments of the present application can be applied to any type of smart terminal, including but not limited to: a drone, an unmanned ship, a smart phone, a robot, a server, a personal computer, a tablet computer, Wearable smart devices, smart home appliances, and more.
  • FIG. 1 is a schematic diagram of one application environment of a data transmission method provided by an embodiment of the present application.
  • the application environment includes: 2 data transmission devices 10 .
  • a wireless communication connection between the two data transmission devices 10 enables wireless data transmission. After any two data transmission devices 10 establish a wireless communication connection, when one of the data transmission devices 10 serves as a transmitting end, the other data transmission device 10 is a receiving end.
  • the data transmission device 10 refers to a device capable of wireless data transmission, and may be any type of intelligent terminal, such as a drone, a remote controller, an unmanned ship, a smart phone, a personal computer, and the like.
  • the two data transmission devices 10 may be the same type of smart terminals, for example, one of the data transmission devices 10 is a drone, and the other data transmission device 10 is also Man-machine, wireless data transmission between the two drones; or, the two data transmission devices 10 can also be different types of intelligent terminals, for example, one of the data transmission devices 10 is a drone, and the other A data transmission device is a remote controller (or flight control device), and the drone can implement wireless data transmission with the remote controller (or flight control device).
  • each data transmission device 10 includes an external interface 11, a digital baseband 12 connected to the external interface 11, a first analog baseband 131 and a second analog baseband 132 connected to the digital baseband 12, and A first RF front end 141 and a second RF front end 142 are connected to the first analog base strip 131 and the second analog base strip 132, respectively.
  • the external interface 11 can be any type of data transmission interface, such as: USB.
  • USB data transmission interface
  • the external interface 11 is used to acquire/receive data to be transmitted by the data transmission device 10 (transmitting end) to another data transmitting device 10 (receiving end); and when the data transmitting device When the data receiving end is 10, its external interface 11 is used to transmit data transmitted by another data transmitting device 10 (transmitting end) to its application layer.
  • the digital baseband 12 can be any suitable central processing unit or microprocessor having some computing power for processing the acquired signals and data. For example, when the data transmission device 10 functions as a data transmitting terminal, its digital baseband 12 can preprocess the received data and then transmit the preprocessed data to the first analog baseband 131 and/or the second analog baseband 132. And when the data transmission device 10 is used as the data receiving end, its digital baseband 12 can process the data received from the first analog baseband 131 and/or the second analog baseband 132, and then send the processed data to the outside thereof. Interface 11.
  • the first analog baseband 131 and the second analog baseband 132 may be a circuit chip for converting a signal type of the received data and transmitting the data, for example, when the data transmission device 10 is used as a data transmitting end, The digital signal obtained in the digital baseband 12 is converted into an analog signal for transmission by the corresponding RF front end; or, when the data transmission device 10 is used as the data receiving end, the analog signal received from the corresponding RF front end is converted into a digital signal for Digital baseband 12 processing.
  • the internal functional units may include, but are not limited to, digital to analog converters, analog to digital converters, modems, phase locked loops, amplifiers, and the like.
  • the first radio frequency front end 141 and the second radio frequency front end 142 may be antennas of any frequency band for transmitting data to the receiving end with radio frequency signals of a specific frequency band.
  • the first analog baseband 131 and the first radio frequency front end 141 constitute The first transmission channel operates in the first frequency band; the second analog baseband 132 and the second RF front end 142 form a second transmission channel and operate in the second frequency band.
  • Data may be transmitted over the first transport channel and/or the second transport channel. It should be noted that when the transmitting end of the data transmits data through its first transmission channel, the receiving end also receives data through its first transmission channel; when the transmitting end of the data transmits data through its second transmission channel, Its receiving end also receives data through its second transmission channel.
  • the process of implementing data transmission between the two data transmission devices 10 may be: the data transmission device 10 as the transmitting end inputs data into the digital baseband 12 through the external interface 11, and the digital baseband 12 pairs
  • the received data is processed and sent to a first transmission channel composed of the first analog baseband 131 and the first RF front end 141 and/or a second composed of the second analog baseband 132 and the second RF front end 142.
  • the transmission channel is then coordinated to transmit the data over the first transmission channel and the second transmission channel.
  • the data transmission device 10 as the receiving end receives the data through its first transmission channel and/or the second transmission channel
  • the data is transmitted to its digital baseband 12, and the digital baseband 12 processes the received data. For example, verification, merging, etc., the processed data is transmitted to the application layer through the external interface 11, thereby completing the data transmission.
  • the data transmission method provided by the embodiment of the present application includes a data sending method and a data receiving method, and the two methods may be used together or may be used separately.
  • the data transmission method provided by the embodiment of the present application can be further extended to other suitable application environments, and is not limited to the application environment shown in FIG. 1. In the actual application process, the application environment may also include more data transmission devices.
  • an embodiment of a data transmission method of the present application includes:
  • Step 101 Receive data
  • the "data” is a collective name for all numbers, letters, symbols, and analogs that can be input into a computer (or any type of processor) for processing, and is a message to be transmitted.
  • the information to be transmitted may include, but is not limited to, control instructions, text, images, voice, video, and the like. Therefore, in this embodiment, the type of the "data” may include, but is not limited to, control instruction data, text data, image data, voice data, video data, and the like.
  • the digital baseband of the transmitting device can receive the data to be transmitted through the external interface.
  • the data enters the digital baseband device in the transmitting device, and the digital baseband converts the data into a digital signal for transmission to the analog baseband (ie, the digital baseband converts the data into a first analog baseband and/or a second mode)
  • the digital signal form of the pseudo baseband identification).
  • Step 102 Cooperate to transmit the data by using a first transmission channel and a second transmission channel, where the first transmission channel is constructed by a first analog baseband and a first radio frequency front end connected to the first analog baseband.
  • the second transmission channel is constructed by a second analog baseband and a second RF front end connected to the second analog baseband, wherein the first analog baseband and the first RF front end operate in a first frequency band, The second analog baseband and the second RF front end operate in a second frequency band, and the first frequency band is different from the second frequency band;
  • the first analog baseband, the first RF front end and the second analog baseband, and the second RF front end are transmission devices of different frequency bands in the transmitting device, and the analog baseband converts the digital signal into an analog signal, and simultaneously transmits the first transmission channel of the data and
  • the second transmission channel frequency band is different, for example, the first transmission channel is 2.4G, and the second transmission channel is 900M.
  • step 102 may include:
  • Step 1021 Copy the data to generate a copy of the data
  • the data content may be copied and generated in a digital baseband to generate a copy.
  • the two may be encoded differently.
  • the encoding method is Will not cause changes in the content of the data.
  • the manner of encoding the data and the data copy may include, but is not limited to, convolutional coding, interleaving coding, check code MD5, parity code, and the like.
  • flag bits can be added to the encoding of the data/data copy to identify which transport channel the data/data copy is to be transmitted over.
  • Step 1022 transmit the data by using the first transport channel, and transmit the data copy by using the second transport channel.
  • the digital baseband transmits the encoded data and data copies to the first transmission channel and the second transmission channel, respectively, and then transmits data through the first transmission channel and transmits the data copy through the second transmission channel.
  • the digital baseband transmits the encoded data to the first analog baseband, and the first analog baseband converts the signal type of the data from the digital signal to the analog signal, and adjusts the frequency band of the analog signal to the first transmitting front end.
  • the digital baseband transmits the encoded data copy to the second analog baseband, and the second analog baseband copies the data
  • the signal type is converted from a digital signal to an analog signal, and the frequency band of the analog signal is adjusted to the transmission band of the second transmitting front end (ie, the second frequency band) and then transmitted by the second transmitting front end to the second transmitting front end of the receiving end.
  • the first transmission channel and the second transmission channel are independent. Therefore, the transmission data and the data copy are not affected by each other, so that the coexistence of data in space is improved, and there is no limitation of the application scenario.
  • step 102 may also include:
  • Step 1023 transmit the data by using the first transport channel.
  • the first transmission channel is used to transmit data for single-band transmission.
  • Step 1024 detecting, by using the second transmission channel, whether there is an interference signal in the transmission space that interferes with the first transmission channel;
  • the second transmission channel that is, the second analog baseband and the second radio frequency front end of the transmitting device detect whether there is interference in the transmission space.
  • An interference signal of a transmission channel which ensures data integrity and real-time performance.
  • the working frequency band of the second transmission channel may be first adjusted to the same working frequency band as the first transmission channel, and then the signal strength of each channel in the frequency band is detected by the second transmission channel, if the signal strength of the first transmission channel is low. At a certain preset threshold, it can be considered that there is an interference signal interfering with the first transmission channel in the transmission space.
  • Step 1025 If the interference signal exists, and when the packet loss rate of the data transmission channel receiving data is greater than a predetermined value, the data is switched from the first transmission channel to the second transmission channel. And transmitting, to the receiving device, a determination signal for determining a data transmission channel;
  • the packet loss rate is preset. For example, the preset packet loss rate is 3%. If the packet loss rate reaches 3% or more than 3%, the transmission channel for transmitting data is switched.
  • the command to switch channels and the sending of the determining signal to the receiving device are performed by the second analog baseband and the second radio frequency front end of the transmitting device, which is advantageous for the receiving device not to receive the data due to channel switching when receiving the data, thereby ensuring data transmission. Real time.
  • the data is discarded, while the second transmission channel requests the transmitting device to resend the data, transmits the data through the second transmission channel, and notifies the receiving device to transmit the information of the switching channel. .
  • Step 1026 If there is no interference signal, continue to transmit the data by the first transmission channel;
  • the second transmission channel is detected until the data is received by the receiving device.
  • the working frequency band of the first transmission channel (the first frequency band) and the working frequency band of the second transmission channel (The second frequency band) is different.
  • the transmission channel of one of the frequency bands is subjected to severe interference, the data can be transmitted to the transmission channel of the other frequency band to improve the anti-interference ability of the data transmission.
  • step 102 may also include:
  • Step 1029 Detect the signal strengths of the first transmission channel and the second transmission channel in real time.
  • data is transmitted as a single-band carrier using only one of the transmission channels at the same time.
  • the transmission channel can determine the signal strength of each transmission channel in the working frequency band through the received feedback signal. The stronger the signal strength, the cleaner the transmission channel and the less interference. Therefore, in the present embodiment, in the process of data transmission, the transmission channel for transmitting data also continuously receives the feedback signal to detect the signal strength in real time, and the other transmission channel performs the air interface detection, that is, only receives the feedback signal. The signal strength is detected in real time.
  • the first transmission channel continuously receives the feedback signal in addition to the data, and detects the signal strength of the first transmission channel in real time according to the received feedback signal, and the second transmission.
  • the channel performs air interface detection, receives only the feedback signal, and detects the signal strength of the second transmission channel in real time according to the received feedback signal, so that by comparing the signal strengths of the first transmission channel and the first transmission channel, which one can be determined
  • the transmission channel is cleaner and has less interference.
  • Step 1020 When the signal strength of the first transmission channel is higher than the signal strength of the second transmission channel, transmitting the data through the first transmission channel, when the signal strength of the first transmission channel is lower than When the signal strength of the second transmission channel is transmitted, the data is transmitted through the second transmission channel.
  • the data when the signal strength of the first transmission channel is detected to be higher than the second transmission channel in real time, the data is transmitted through the first transmission channel, when the signal strength of the first transmission channel is lower than the second transmission channel. Transmitting the data over a second transmission channel. That is, in the process of transmitting data, data can jump between the first transmission channel and the second transmission channel, and data is always transmitted through a transmission channel having a stronger signal strength.
  • the data is currently transmitted through the first transmission channel. If the signal strength of the first transmission channel is higher than the signal strength of the second transmission channel, the data is continuously transmitted through the first transmission channel; If the signal strength is lower than the signal strength of the second transmission channel, the data is switched to the first Two transport channels are transmitted, and so on.
  • the packet loss rate of the first transport channel and the second transport channel is also detected in the process of transmitting data (ie, the amount of data received by the first receiving end/the amount of data sent by the transmitting end)
  • the packet loss rate of one of the transmission channels is greater than or equal to the preset threshold, the data is switched to another transmission channel to ensure the integrity of the data.
  • the digital baseband after receiving the data to be transmitted, performs segmentation processing on the data, and generates first divided data and second divided data.
  • the second segmentation data is core content of the data
  • the first segmentation data is data other than the core content in the data
  • the capacity of the first segmentation data is greater than the second segmentation The capacity of the data.
  • the core content refers to key data in the received data
  • the type of the key data may be preset.
  • data that is used to control flight, flight attitude feedback, positioning, etc. affecting the basic flight of the drone is the core content, and data such as images obtained by aerial photography is non-essential, and is non-core content. Therefore, after the digital baseband receives the data to be transmitted, the data may be first divided according to the preset key data type, and the data belonging to the key data type is divided into the second divided data, and the other data is divided into the first. Split the data.
  • step 102 may include:
  • Step 1027 Perform encryption processing on the second divided data according to a preset encryption algorithm.
  • the encryption algorithm can be preset into a variety of forms.
  • the difficulty of setting the password according to the importance level of the core content can be different.
  • the password that can be set is not particularly important, the password is a number plus an English letter, and the important data can be set. It is a number plus an English letter plus a special symbol; of course, the length of the password can also be set to a fixed value.
  • Step 1028 transmit the first split data by using the first transport channel, and transmit the encrypted second split data by using the second transport channel.
  • the frequency band of the first transmission channel is larger than the second transmission channel, the first transmission channel is used to transmit the first divided data with a large capacity, and the second transmission channel is used to transmit the second divided data with a small capacity, because the two transmissions are
  • the channels are independent of each other, so the first divided data and the second divided data do not affect each other.
  • the second split data is transmitted through the second transmission channel with a narrow frequency band, and the anti-interference capability is stronger, and the core content in the transmission data is prevented from being lost.
  • the first and second transmission channels are constructed by using the first and second analog basebands and the first and second radio frequency front ends in the transmitting device, and the cooperation between the first and second transmission channels is performed.
  • the data is transmitted, and the data is transmitted through the analog baseband and the radio frequency front end in the physical layer, and the data transmission is ensured by using the mutual cooperation of the two transmission channels, and the real-time data is realized with the minimum redundancy design.
  • the transmission also increases the spatial coexistence of data due to the transmission of data using two transmission channels, and there is no limitation of the application scenario.
  • FIG. 7 is a flowchart of a second embodiment of a data transmission method according to the present application.
  • the data transmission method includes:
  • Step 201 Receive data through a first transmission channel and a second transmission channel, where the first transmission channel is constructed by a first analog baseband and a first radio frequency front end connected to the first analog baseband, where The second transmission channel is constructed by a second analog baseband and a second RF front end connected to the second analog baseband, wherein the first analog baseband and the first RF front end operate in a first frequency band, and the second simulation The baseband and the second RF front end operate in a second frequency band, and the first frequency band is different from the second frequency band;
  • the first analog baseband, the first RF front end and the second analog baseband, and the second RF front end are transmission devices of different frequency bands in the receiving device, the first analog baseband and the first RF front end are in one frequency band, the second analog baseband and the second RF The front end is in one frequency band, and the first transmission channel and the second transmission channel frequency band used for transmitting data are also different.
  • the first transmission channel is 2.4G
  • the second transmission channel is 900M.
  • Step 202 Restore complete data according to the received data
  • step 202 includes:
  • Step 2021 Parse the data to determine whether the data is correct.
  • the method of parsing the data is also performed according to a preset parsing algorithm.
  • the preset parsing algorithm corresponds to the preset encapsulation algorithm, and the manner of verifying whether the first transport packet is correct may be various, for example, in the first transport packet.
  • the check code is set, the first transmission data packet is verified to be correct by the check code, or the first transmission data packet is determined to be correct by determining whether the first transmission data packet includes the first and last package identifiers.
  • Step 2022 If the data is correct, determine the data received for the first time
  • the transmitting device transmits data to the receiving device
  • the data having the same content is transmitted through the first transmission channel and the second transmission channel respectively.
  • one data content is sent to the receiving device through the first transmission channel and the second transmission channel respectively.
  • the receiving device can receive data from the first transmission channel and the second transmission channel in a sequential order.
  • Step 2023 Process the data received for the first time
  • step 201 further includes:
  • Step 2011 Receive a determination signal by using a first transmission channel or a second transmission channel, where the determination signal is used to determine one channel from the first transmission channel and the second transmission channel as a data transmission channel;
  • only one of the transmission channels is used as the single-band carrier to transmit data at the same time, and the data can jump between the two transmission channels at an appropriate timing, and when the data is jumped, the receiving end can transmit the data.
  • the transmission channel of the data receives a determination signal indicating that the data is being transmitted on the transmission channel.
  • the second transmission channel of the transmitting end since the second transmission channel of the transmitting end performs spatial detection, if a signal that interferes with the first transmission channel is detected, the channel for data transmission is switched from the first transmission channel to the second transmission channel.
  • the transmitting end sends a determining signal to the receiving end, so that the data is received by the second transmission channel. If the second transmission channel of the transmitting end does not detect the interference signal, the data is normally transmitted by the first transmission channel, so that the receiving end is first The transmission channel receives data.
  • the transmitting end detects the signal strengths of the first transmission channel and the second transmission channel in real time, when the signal strength of the first transmission channel is higher than that of the second transmission channel.
  • the transmitting end transmits the data by using the first transmission channel.
  • the transmitting end sends a determining signal of “transmitting by the first transmission channel” to the receiving end, and the receiving end receives the determining signal and passes the first A transmission channel receives the data; when the signal strength of the first transmission channel is lower than the signal strength of the second transmission channel, the transmitting end transmits the data by using the second transmission channel, and at this time, the transmitting end also sends a signal to the receiving end.
  • the determining signal transmitted by the second transmission channel receives the data through the second transmission channel after receiving the determination signal.
  • Step 2012 receiving data on the determined data transmission channel
  • Step 2013 detecting, by using a transmission channel that is not used as transmission data among the first transmission channel and the second transmission channel, an interference signal of another data transmission channel of the transmission data;
  • One of the transmission channels is used to transmit data, and the other transmission channel that does not transmit data detects whether there is a signal in the entire space that interferes with the transmission channel of the transmission data.
  • Step 2014 if the interference signal exists, and when the packet loss rate of the data transmission channel receiving data is greater than a predetermined value, re-determining the data transmission channel, and transmitting the determination signal to the transmitting device, and returning to the re-determined Receiving data on a data transmission channel;
  • the packet loss rate is preset. For example, the preset packet loss rate is 3%. If the packet loss rate reaches 3% or greater than 3%, the data indicates that the data is incomplete due to the interference signal, and the receiving device requests the transmitting device to resend. Data and switching channels, by switching the transmission channel at the physical layer, which facilitates the quality of data transmission and increases the speed of data transmission.
  • a data transmission method of the present application further includes:
  • Step 203 Decrypt data received from the second transmission channel according to a preset decryption algorithm.
  • the preset decryption algorithm corresponds to a preset encryption algorithm.
  • step 202 further includes:
  • Step 2024 Combine the decrypted data and the data received from the first transmission channel into complete data.
  • Combining the decrypted data with the data received from the first transport channel is implemented at the physical layer, ensuring that the data transmitted to the application layer is unique and correct, and efficient and timely data transmission is realized.
  • the first and second transmission channels are constructed by using the first and second analog basebands and the first and second radio frequency front ends in the receiving device, and the data is received by the first and second transmission channels and restored.
  • the data is received by the analog baseband and the radio frequency front end in the physical layer, and the data is merged at the physical layer by realizing the switching of the transmission channel at the physical layer, thereby ensuring a small delay in data transmission and improving the data.
  • the transmitting device 300 includes a digital baseband 302, a first analog baseband 303, a first RF front end 305, a second analog baseband 304, and a second RF front end 306.
  • the first analog baseband 303 is connected to the digital baseband 302 and the first RF front end 305, respectively, and the second analog baseband 304 is connected to the digital baseband 302 and the second RF front end 306, respectively, the first analog baseband 303 and the first
  • the RF front end 305 operates in the first frequency band
  • the second analog baseband 304 and the second RF front end 306 operate in the second frequency band
  • the first frequency band is different from the second frequency band
  • the first analog baseband 303 and the first RF front end 305 constructing a first transmission channel
  • the second radio frequency front end 306 constructs a second transmission channel
  • the digital baseband 302 is configured to receive data, preprocess the data, and convert the data into a digital signal (wherein the digital signal is capable of being used by the first analog baseband 303) And/or a digital signal identified by the second analog baseband 304);
  • the first transmission channel and the second transmission channel cooperate to convert the digital signal into an analog
  • the digital signals are two groups, which are respectively a first digital signal and a second digital signal, wherein the first digital signal is generated according to data transmitted by the external interface 301, and the second digital signal is based on Generating a copy of the data; the first transmission channel and the second transmission channel cooperate to convert the digital signal into an analog signal, and modulate the analog signal to a corresponding frequency band for transmission; Converting the first digital signal into an analog signal, modulating the analog signal converted by the first digital signal to transmit on a first frequency band; the first transmission channel is configured to convert the second digital signal into an analog signal, The analog signal obtained by the second digital signal conversion is modulated to transmit on the second frequency band.
  • the first transmission channel and the second transmission channel cooperate to convert the digital signal into an analog signal, and modulate the analog signal to a corresponding frequency band to transmit: the first transmission channel is used for digital signal conversion Analog signal, the analog signal converted by the digital signal is modulated to be transmitted on a first frequency band; the second transmission channel is configured to detect whether there is an interference signal in the transmission space that interferes with the first transmission channel, if the presence Interfering with the signal, and when the packet loss rate of the data transmission channel receiving data is greater than a predetermined value, switching the data from the first transmission channel to the second transmission channel, and transmitting the determination to the receiving device
  • the second transmission channel is a determination signal of the data transmission channel.
  • the digital signals are two groups, which are respectively a first digital signal and a second digital signal, wherein the second digital signal is generated according to core content in the data, and the second digital signal is based on The content of the data is generated other than the core content.
  • the first transmission channel and the second transmission channel cooperate to convert the digital signal into an analog signal, and modulate the analog signal to a corresponding frequency band to transmit:
  • the first transmission channel is configured to convert the first digital signal into an analog signal, modulate the analog signal converted by the first digital signal into a first frequency band, and transmit the first digital transmission signal to the second digital signal. Converting the analog signal, modulating the analog signal converted by the second digital signal to transmit on the second frequency band.
  • the transmitting device of the embodiment of the present application exists in various forms, including but not limited to:
  • Mobile communication devices These devices are characterized by mobile communication functions and are mainly aimed at providing voice and data communication.
  • Such terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.
  • Ultra-mobile personal computer equipment This type of equipment belongs to the category of personal computers, has computing and processing functions, and generally has mobile Internet access.
  • Such terminals include: PDAs, MIDs, and UMPC devices, such as the iPad.
  • Portable entertainment devices These devices can display and play multimedia content. Such devices include: audio, video players (such as iPod), handheld game consoles, e-books, and smart toys and portable car navigation devices.
  • the server consists of a processor, a hard disk, a memory, a system bus, etc.
  • the server is similar to a general-purpose computer architecture, but because of the need to provide highly reliable services, processing power and stability High reliability in terms of reliability, security, scalability, and manageability.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the first and second transmission channels are constructed by using the first and second analog basebands and the first and second radio frequency front ends in the transmitting device, and the cooperation between the first and second transmission channels is performed.
  • the data is transmitted, and the data is transmitted through the analog baseband and the radio frequency front end in the physical layer, and the data transmission is ensured by using the mutual cooperation of the two transmission channels, and the real-time data is realized with the minimum redundancy design.
  • the transmission also increases the spatial coexistence of data due to the transmission of data using two transmission channels, and there is no limitation of the application scenario.
  • the receiving device 400 includes: a digital baseband 405, a first analog baseband 403, a first RF front end 401, a second analog baseband 404, and a second RF front end 402.
  • An analog baseband 403 is coupled to the digital baseband 405 and the first RF front end 402, respectively, and the second analog baseband 404 is coupled to the digital baseband 405 and the second RF front end 402, respectively, the first analog baseband 403 and the first RF front end 401.
  • the second analog baseband 404 And the second RF front end 402 operates in the second frequency band, the first frequency band is different from the second frequency band, the first analog baseband 403 and the first RF front end 401 construct a first transmission channel, the second analog baseband 404 and the second RF
  • the front end 402 constructs a second transport channel; the first transport channel and the second transport channel are for receiving analog signals and converting the analog signals into digital signals; the digital baseband 405 is for converting the digital signals into data.
  • the digital baseband 405 converts the digital signal into data and parses the data to determine whether the data is correct. If the data is correct, the first received data is determined to be received for the first time. The data is processed; if the data is incorrect, the data is discarded and the transmitting device is requested to resend and switch the transport channel.
  • the digital baseband 405 is in the physical layer. By implementing the judgment of the data in the physical layer, it is not necessary to process at the application layer, and the data transmitted from the digital baseband to the application layer is guaranteed to be unique and correct, thus reducing the delay of the system.
  • the first transmission channel and the second transmission channel are configured to receive an analog signal and convert the analog signal into a digital signal, including: receiving, by using the first transmission channel or the second transmission channel, the determining signal, where Determining a channel from the first transmission channel and the second transmission channel as a data transmission channel; receiving an analog signal on the determined data transmission channel and processing.
  • the digital baseband Using the first transmission channel and the second transmission channel as transmission channels for transmitting data to detect an interference signal of another data transmission channel of the transmission data; if the interference signal is present, and based on the simulation received from the data transmission channel a signal, when it is determined that a packet loss rate of the analog signal received by the data transmission channel is greater than a predetermined value, the digital baseband requires the transmission channel to re-determine the data transmission channel, and send a determination signal to the transmitting device, and return the The analog signal is received on the determined data transmission channel.
  • the interference signal is detected by the analog baseband of the physical layer, and the switching of the transmission channel is implemented at the physical layer, thereby improving the quality of the data transmission and ensuring that the signal is not interfered.
  • the data baseband 405 combines the received two sets of data, that is, the first divided data and the second divided data into complete data.
  • the receiving device of the embodiment of the present application exists in various forms, including but not limited to:
  • Mobile communication devices These devices are characterized by mobile communication functions and are mainly aimed at providing voice and data communication.
  • Such terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.
  • Ultra-mobile personal computer equipment This type of equipment belongs to the category of personal computers, has computing and processing functions, and generally has mobile Internet access.
  • Such terminals include: PDAs, MIDs, and UMPC devices, such as the iPad.
  • Portable entertainment devices These devices can display and play multimedia content. Such devices include: audio, video players (such as iPod), handheld game consoles, e-books, and smart toys and portable car navigation devices.
  • the server consists of a processor, a hard disk, a memory, a system bus, etc.
  • the server is similar to a general-purpose computer architecture, but because of the need to provide highly reliable services, processing power and stability High reliability in terms of reliability, security, scalability, and manageability.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the first and second transmission channels are constructed by using the first and second analog basebands and the first and second radio frequency front ends in the receiving device, and the data is received by the first and second transmission channels and restored.
  • the data is received by the analog baseband and the radio frequency front end in the physical layer, and the data is merged at the physical layer by realizing the switching of the transmission channel at the physical layer, thereby ensuring a small delay in data transmission and improving the data.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé de transmission de données comprenant la réception de données, et la transmission de données par un premier canal de transmission en coopération avec un second canal de transmission, le premier canal de transmission étant construit à l'aide d'une première bande de base analogique et d'une unité frontale RF connectée à la première bande de base analogique, le second canal de transmission étant construit à l'aide d'une seconde bande de base analogique et d'une seconde unité frontale RF connectée à la seconde bande de base analogique, la première bande de base analogique et la première unité frontale RF fonctionnant sur une première bande de fréquences, et la seconde bande de base analogique et la seconde unité frontale RF fonctionnant sur une seconde bande de fréquences. La présente invention garantit une transmission de données précise et au bon moment, grâce à la coopération entre un premier canal de transmission et un second canal de transmission.
PCT/CN2017/096899 2016-10-12 2017-08-10 Procédé de transmission de données, appareil de transmission et appareil de réception Ceased WO2018068570A1 (fr)

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