CN109412679A - Big-dipper satellite multi-antenna communication method - Google Patents
Big-dipper satellite multi-antenna communication method Download PDFInfo
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- CN109412679A CN109412679A CN201811537527.2A CN201811537527A CN109412679A CN 109412679 A CN109412679 A CN 109412679A CN 201811537527 A CN201811537527 A CN 201811537527A CN 109412679 A CN109412679 A CN 109412679A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
- H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
Big-dipper satellite multi-antenna communication method provided by the invention, include the following steps: Step 1: provide one include multiple Beidou antennas transmitting terminal；Step 2: the transmitting terminal receives the communication data of user's input and the receiving end address for receiving the communication data, and judge whether the length of the communication data is greater than the maximum text length that the single Beidou antenna single is sent, if so, being split to the communication data；Step 3: successively detecting with the presence or absence of idle Beidou antenna in multiple Beidou antennas, if so, successively sending the subdata packet to receiving end corresponding with the receiving end address using the idle Beidou antenna.The present invention improves the efficiency of Beidou satellite communication.
Description
Technical field
The present invention relates to Beidou satellite communication technical field more particularly to a kind of big-dipper satellite multi-antenna communication methods.
Background technique
Big Dipper short message communication is the distinctive function of Beidou Navigation System, not by orographic condition and amblent air temperature etc.
It influences, can solve real-time communication of data problem from far-off regions, that there are blind areas is more, capital construction is thrown especially suitable for general communication means
Enter big occasion to use, for example, offshore acquisition and rescue communication etc..But since the main task of big-dipper satellite is positioning
Navigation, it is seldom for the channel resource of communication task, cause civilian Big Dipper short message to be limited to single message in communication process
Length and communication frequency problem, this is substantially reduced communication efficiency, such as when reporting the condition of a disaster and emergency relief, each
Second is all critically important, each details is very heavy, it is clear that is such issues that can not solve for single antenna Big Dipper short message communication.
Aiming at the problem that big-dipper satellite single antenna communications low efficiency, researchers expand correlative study.As Beidou is defended
In the implementation energetically of military and civilian aspect, Android occurs many split type or integrated star navigation system in the market
The Beidou communicating terminal of formula is proposed a kind of offline by analyzing the deficiency and defect of existing user terminal I/O mode
Voice technology can utilize " news rumours sound+" real in the Big Dipper short message communication APP software developed based on android system
Offline speech recognition input and the offline speech-sound synthesizing function of existing Big Dipper short message information.Short message communication is China's big-dipper satellite
The distinctive function of navigation system can be used for the data transmission of public network communication overlay blind zone position.And frequency and message length
Limitation, the efficiency of Big Dipper short message communication is reduced, for this purpose, proposing in the prior art a kind of for Beidou communication data
Compression method.In two steps, the first step is lossy compression to this method, using the revolving door algorithm in industrial database compress technique as base
Plinth, while in order to realize that the precision of lossy compression is adjustable, with improved BP neural network PID controller to the ginseng of revolving door algorithm
Number carries out on-line tuning；Second step is lossless compression, proposes the lossless compression strategy of preposition special byte cooperation difference transmitting.
It tests and shows to complete higher compression to industrial process data after two step of the method is compressed, meanwhile, compression accuracy can also
It is accurately adjusted in compression process.
Although research method in the prior art all to a certain extent improves to some extent to Big Dipper short message communication efficiency,
It is to have little effect, and be difficult to realize for the complexity of actual development, especially in multiple send, with top
Method can not just provide reliable communication requirement.
Therefore, the efficiency for how improving Beidou satellite communication system is a technical problem to be solved urgently.
Summary of the invention
The present invention provides a kind of big-dipper satellite multi-antenna communication method, for solve existing Beidou satellite communication efficiency compared with
Low problem.
To solve the above-mentioned problems, the present invention provides a kind of big-dipper satellite multi-antenna communication method, include the following steps:
Step 1: providing a transmitting terminal including multiple Beidou antennas；
Step 2: the transmitting terminal receives the communication data of user's input and the reception for receiving the communication data
Address is held, and it is long to judge whether the length of the communication data is greater than the maximum text that the single Beidou antenna single is sent
Degree, if so, being split to the communication data；The specific steps split to the communication data include:
The packet header sequence number number in the communication data is calculated using following formula 1:
The communication data is split as several segments identical as the packet header sequence number number and be arranged in order
Data；
Each fragment data packet is encoded using multi-antenna transmitting transport format, forms several subdata packets；Institute
Stating multi-antenna transmitting transport format includes packet header sequence number, feedback marks position, fragment data and packet last sequence number；The packet header sequence number
Indicate position of the current clip data in the communication data；Whether the feedback marks position is for judging current clip data
Completely, it when its value is 0, indicates that current clip data are complete, when its value is 1, indicates that current clip data are imperfect；It is described
Packet last sequence number is the latter place value of the packet header sequence number；
Step 3: successively detecting with the presence or absence of idle Beidou antenna in multiple Beidou antennas, if so, using empty
The not busy Beidou antenna successively sends the subdata packet to receiving end corresponding with the receiving end address.
It preferably, further include message SN in the subdata packet, the message SN includes message numbering and institute
State the sequence number for sending the Beidou antenna of the subdata packet；The big-dipper satellite multi-antenna communication method further includes walking as follows
It is rapid:
The transmitting terminal judges whether to receive the confirmation message that the receiving end is sent, if so, judging the confirmation
Whether message is identical as the message SN in the subdata packet that it sends；If the transmitting terminal confirms the confirmation message and its
Message SN in the subdata packet of transmission is identical, then confirms that the subdata packet is sent successfully；The confirmation message includes
The message SN in subdata packet that the receiving end receives.
Big-dipper satellite multi-antenna communication method provided by the invention, by being sent to length greater than single Beidou antenna single
The communication data of maximum text length split, and the fragment data after fractionation is transmitted using specific multi-antenna data
Format is encoded, and is formed several subdata packets, is improved the efficiency of Beidou satellite communication；And due to being provided in transmitting terminal
Multiple Beidou antennas send the subdata packet using the idle Beidou antenna in multiple Beidou antennas, reduce Beidou information
The waiting time of transmission further improves the communication efficiency of big-dipper satellite.
Detailed description of the invention
Attached drawing 1 is the process signal of transmitting terminal in big-dipper satellite multi-antenna communication method in the specific embodiment of the invention
Figure；
Attached drawing 2 is the process signal of receiving end in big-dipper satellite multi-antenna communication method in the specific embodiment of the invention
Figure；
Attached drawing 3 is the overall structure diagram that big-dipper satellite multi-antenna communication is carried out in the specific embodiment of the invention；
Attached drawing 4 is the structural schematic diagram of big-dipper satellite multi-antenna communication controller in the specific embodiment of the invention；
Attached drawing 5 is the structural schematic diagram of multi-antenna transmitting transport format in the specific embodiment of the invention；
Attached drawing 6 is the structural schematic diagram of inbound confirmation and retransmission mechanism in the specific embodiment of the invention；
Attached drawing 7 is the structural schematic diagram of outbound confirmation and retransmission mechanism in the specific embodiment of the invention.
Specific embodiment
The specific embodiment of big-dipper satellite multi-antenna communication method provided by the invention is done in detail with reference to the accompanying drawing
Explanation.
Present embodiment provides a kind of big-dipper satellite multi-antenna communication method, and attached drawing 1 is specific implementation of the present invention
In mode in big-dipper satellite multi-antenna communication method transmitting terminal flow diagram.As shown in Figure 1, present embodiment provides
Big-dipper satellite multi-antenna communication method, include the following steps:
Step 1: providing a transmitting terminal including multiple Beidou antennas.
Step 2: the transmitting terminal receives the communication data of user's input and the reception for receiving the communication data
Address is held, and it is long to judge whether the length of the communication data is greater than the maximum text that the single Beidou antenna single is sent
Degree, if so, being split to the communication data；The specific steps split to the communication data include:
The packet header sequence number number in the communication data is calculated using following formula 1:
The communication data is split as several segments identical as the packet header sequence number number and be arranged in order
Data；
Each fragment data packet is encoded using multi-antenna transmitting transport format, forms several subdata packets；Institute
Stating multi-antenna transmitting transport format includes packet header sequence number, feedback marks position, fragment data and packet last sequence number；The packet header sequence number
Indicate position of the current clip data in the communication data；Whether the feedback marks position is for judging current clip data
Completely, it when its value is 0, indicates that current clip data are complete, when its value is 1, indicates that current clip data are imperfect；It is described
Packet last sequence number is the latter place value of the packet header sequence number.
Specifically, the serial ports of Beidou information protocol uses non-synchronous transmissions, and it is (silent that transmission rate is arranged to 19200bit/s
Recognize).Interface data transmission basic format is as shown in table 1.
The basic format of 1 Beidou information protocol interface data transmission of table
| Instruction/content | Length | Station address | The information content | Verification and |
" instruction " or " content " is to indicate to be transmitted with ASCII character, and each ASCII character is a byte (byte)；
" length " is indicated since the data total bytes starting character " $ " until " verification and " (containing verification and)；
" station address " is the subscriber computer ID number being connected with peripheral hardware, and length is 3 bytes, and wherein significance bit is low 21bit,
High 3bit fills out " 0 "；
" verification and " refer to since starting character " $ " until the previous byte of " verification and ", by byte exclusive or conduct
Effect result；
" information content " is indicated with binary system true form, and each parameter is filled according to the length of call format, is discontented with foot length
When degree requires, " 0 " is mended in a high position.Information first passes upper byte, passes low word afterwards according to whole byte transmission, multibyte information
Section；In addition, the first bit sign position Uniform provisions are that " 0 " indicates "+", and " 1 " indicates "-", and position thereafter is used for there is symbolic parameter
True form indicates to be used as parameter value.
During Big Dipper short message communication, the transformat for sending and receiving short message information is as shown in table 2.
Table 1 sends and receives the transformat of short message information
On Beidou communication agreement, present embodiment provides a kind of multi-antenna transmitting transport format, is mainly embedded in
Among the information content in Beidou communication agreement.After user has edited communication data, the transmitting terminal judges the communication
Whether the byte number of data exceeds the maximum text length (i.e. maximum number of byte) that the single Beidou antenna single is sent, if
Be not more than, then do not do any operation and directly transmit, i.e., only with transformat as shown in Figure 5 and single antenna transmissions format into
Row coding；If it is greater, then common using transformat as shown in Figure 5, single antenna transmissions format and multi-antenna transmitting transport format
It is encoded.
Step 3: successively detecting with the presence or absence of idle Beidou antenna in multiple Beidou antennas, if so, using empty
The not busy Beidou antenna successively sends the subdata packet to receiving end corresponding with the receiving end address.
Attached drawing 2 is the process signal of receiving end in big-dipper satellite multi-antenna communication method in the specific embodiment of the invention
Figure.Specifically, during the transmitting terminal sends the communication data, the traversal available serial ports of computer is first had to,
When opening and adding serial ports, since available different establish a capital of serial ports is connected to Beidou antenna, it is possible to first traverse out
Serial ports list can be used, goes selection to think serial ports to be used by user oneself.Then, receiving end address is inputted by user, here
Receiving end address is the identity sequence number of the Beidou antenna positioned at receiving end, and corresponding one of each Beidou antenna is uniquely
Location.Then, the information content (i.e. communication data) for wanting to send is inputted by user.When the byte length of the communication data does not have
When sending maximum number of byte greater than Beidou antenna single, a Beidou antenna can be used only and sent, send north in selection
Struggle against antenna when, first detect the Beidou antenna at this moment whether idle (whether can be used), if so, thening be used directly the free time
Beidou antenna is sent；If it is not, whether detect next Beidou antenna idle, when none Beidou antenna free time, into
The state for entering standby mode and each Beidou antenna of continuous observation, is sent again when available free antenna.
If the byte length of communication data is greater than Beidou antenna single transmission maximum number of byte, packet header is calculated first
Then communication data is split into several fragment datas being arranged in order according to packet header sequence number number by sequence number number,
Then each fragment data is encoded, forms several subdata packets.As when next being sent with single Beidou antenna, that is, exist
Carried out before sending this moment Beidou antenna whether Kong Xian judgement, sent after judgement, complete entire communication logic and send out
Sending end process.
It is simpler compared to transmitting terminal for communication logic receiving end process as shown in Figure 2, it is its inverse process,
And big-dipper satellite only limits transmitting terminal, and receiving end is not limited, and a Beidou antenna can continuously receive more
The short message that a Beidou antenna is sent.So receiving end is without being made whether that available free antenna can use judgement.Only needing judgement is
It is no be split data, and all subdata packets of fractionation receive carry out Data Integration at total short message, then into
Row decoding.
Wherein, the value of packet header sequence number number is by adding one after calculating " communication data byte length/(84 byte) " rounding
It obtains.The feedback marks be the receiving end judge whether current clip data complete, either with or without packet drop occur according to
According to when its value is " 0 ", the current clip data in the receiving end confirmation current sub-data packet are complete, can be by current clip
Data are directly used in subsequent Data Integration；Current slice when its value is " 1 ", in the receiving end confirmation current sub-data packet
Segment data is imperfect, has the case where packet loss, at this point, the receiving end notify the transmitting terminal send or reissue again with
The corresponding fragment data of packet header sequence number in current sub-data packet.The packet last sequence number is the last of the packet header sequence number
One place value, as the mark for connecting each fragment data of forming a connecting link.Since the communication data is according to the packet header
What sequence number was split in order, therefore, during several described fragment datas are integrated in the receiving end, according to the packet
Last sequence number connects two adjacent fragment datas, the integrated operation of several fragment datas is realized, to restore the communication
The content of data.
It preferably, further include message SN in the subdata packet, the message SN includes message numbering and institute
State the sequence number for sending the Beidou antenna of the subdata packet；The big-dipper satellite multi-antenna communication method further includes walking as follows
It is rapid:
The transmitting terminal judges whether to receive the confirmation message that the receiving end is sent, if so, judging the confirmation
Whether message is identical as the message SN in the subdata packet that it sends；If the transmitting terminal confirms the confirmation message and its
Message SN in the subdata packet of transmission is identical, then confirms that the subdata packet is sent successfully；The confirmation message includes
The message SN in subdata packet that the receiving end receives.
Attached drawing 6 is the structural schematic diagram of inbound confirmation and retransmission mechanism in the specific embodiment of the invention, and attached drawing 7 is this hair
The structural schematic diagram of outbound confirmation and retransmission mechanism in bright specific embodiment.Specifically, in order to guarantee big-dipper satellite more days
The reliable communication of line short message communication system, on the basis of being based on big-dipper satellite short message communication protocol, this specific embodiment party
Formula also adds message SN, in order to which transmitting terminal and receiving end identify different message.The transmitting terminal is sent to
The inbound messages of the receiving end are numbered the inbound messages to be sent (such as subdata packet) by the transmitting terminal, and
Using the sequence number of this message numbering and the Beidou antenna for sending the subdata packet as the message SN.For institute
The outbound message that receiving end is sent to the transmitting terminal is stated, the outbound message to be sent is numbered by the receiving end, and
Using the sequence number of this message numbering and the Beidou antenna for sending the subdata packet as the message SN.It is outbound to disappear
Breath or inbound messages occupy the effective length of message after increasing message SN, and the efficient communication length of big-dipper satellite is
210byte or so, message SN, which occupies 3byte or so, can meet needs.
For example, as shown in fig. 6, waiting receiving end to issue confirmation message after transmitting terminal issues inbound messages.If
Transmitting terminal receives receiving end and issues confirmation message, and the message SN confirmed is exactly the message SN issued, transmitting terminal
Think to send successfully.If transmitting terminal does not receive the confirmation message of receiving end sending within a certain period of time, then it is assumed that message hair
Failure (error code may be lost or be had to message) is sent, transmitting terminal retransmits the message, waits confirmation message always.
As shown in fig. 7, waiting transmitting terminal to issue confirmation message after receiving end issues outbound message.If receiving end receives
Transmitting terminal issues confirmation message, and the message SN confirmed is exactly the message SN issued, the civilian operation centre of Beidou
Think to send successfully.If receiving end does not receive the confirmation message of transmitting terminal sending within a certain period of time, then it is assumed that message hair
Failure (error code may be lost or be had to message) is sent, the message is retransmitted in receiving end, waits confirmation message always.By dividing above
Analysis, either transmitting terminal or receiving end, when receiving short message every time, all progress inbound and outbound message authentication and again
Hair mechanism, to reach big-dipper satellite multiple antennas short message communication system with this index of high reliable communication.
Present embodiment be improve big-dipper satellite multiple antenna communication by two-way repeating transmission and affirmation mechanism can
By property, after Beidou multiple antennas transmitting terminal is sent successfully, Beidou multiple antennas receiving end can check inbound messages using CRC effect
Integrality and bit error rate state, if inbound messages there is no packet loss or leakage hair data packet the case where, Beidou more days
The feedback information that line transmitting terminal will receive Beidou multiple antennas receiving end is confirmed.
If feedback information can prompt to fail, and transmitting terminal will do it the case where sending out data packet there are packet loss or leakage
Retransmit Message Opcode.In receiving end also in compliance with same repeating transmission and affirmation mechanism, as long as there is traffic operation, inbound letter is carried out
The short message integrity checking of breath, to ensure that the reliability of whole system.
Present embodiment additionally provides a kind of big-dipper satellite multi-antenna communication controller, institute in present embodiment
The big-dipper satellite multi-antenna communication controller stated can be the transmitting terminal and/or the receiving end.Attached drawing 3 is of the invention specific
The overall structure diagram of big-dipper satellite multi-antenna communication is carried out in embodiment, attached drawing 4 is in the specific embodiment of the invention
The structural schematic diagram of transmitting terminal.
Specifically, as shown in Figure 3, Figure 4, the big-dipper satellite multi-antenna communication controller includes control unit, signal
Transmission unit and communication unit.Wherein, described control unit, the ARM9 microprocessor for having transplanted (SuSE) Linux OS for one, type
Number be S3C2440 chip 10；The signal transmission unit, connection described control unit and the communication unit, including UT-1204
The USBHUB hub 13 of the RS485 converter 11 of model, the RS232 converter 12 of ZE551A model and CR116 model；It is described
Communication unit, the Beidou antenna 14 including multiple TS8613 models, for being communicated with big-dipper satellite 15；The signal transmission unit
In include the multiple RS485 converters 11 to connect one to one with multiple Beidou antennas 14 and with multiple RS485 converters 11
The multiple RS232 converters 12 to connect one to one；One end connection ARM9 microprocessor of the USBHUB hub 13,
The other end has multiple USB serial ports being set side by side, and multiple USB serial ports and multiple RS232 converters 12 are one by one
It is correspondingly connected with；The USBHUB hub 13, will for recycling to multiple RS232 converter castings or receiving data
Data transmission to the ARM9 microprocessor that all Beidou antennas 14 transmit carries out integration processing, is also used to receive micro- through the ARM9
The data of processor deconsolidation process；The RS232 converter 12 is located at the communication unit and institute with the RS485 converter 11
It states between USBHUB hub 13, for the mutual conversion between Beidou signal and differential signal.
Signal transmission unit described in present embodiment uses the signal transmission form of multi-cascade, following stage connection
The USBHUB hub 13, main task are to distribute the transmission data from the ARM9 micro process to corresponding USB to go here and there
Mouthful, then the data by the self-corresponding USB serial ports output are converted via RS232 converter 12 and RS485 connected to it
11 change data transmission mode of device, so that differential signal is changed into after Beidou signal, output to the corresponding Beidou antenna
14.The RS485 converter uses single positive 5V power work, using half duplex communication mode, due to the signal of its transmission
Belong to differential signal, transmission range can extend to one kilometer.The USBHUB hub 13 is mainly used for transmitting all Beidous
Antenna data is simultaneously transmitted to ARM9 microprocessor and carries out integration processing, and by the subdata after ARM9 microprocessor fractionation
Packet is transmitted to the USB serial ports connecting with idle Beidou antenna.Present embodiment is by using the USBHUB collection
Line device 13 changes the single formula structure of original bus, but uses star-network topological structure, realize with it is multiple described
While the matching of Beidou antenna 14 is corresponding, additionally it is possible to so that the signal transmission of client is more stable.
RS485 converter 11 by UT-1204 model of signal transmission unit in present embodiment, ZE551A model
RS232 converter 12 and the USBHUB hub 13 of CR116 model form, the USBHUB hub 13 is mainly used for extending
USB serial ports, even if obtaining capable of connecting simultaneously with the ARM9 micro process for multiple Beidou antennas 14, while it is pending to realize distribution
The data sent are to the corresponding Beidou antenna 14 and the function that receives the data from multiple Beidou antennas 14.
Communication unit in present embodiment includes multiple Beidou antennas 14, is led in a manner of half-duplex operation
Letter, is mainly used for carrying out data communication between the signal transmission unit and the big-dipper satellite 15.Each Beidou antenna 14
There are dedicated Beidou chip, the sequence number (ID) that each chip has oneself to fix, the Beidou antenna 14 of multiple TS8613 models
Corresponding multiple RS485 converters 11.By taking the communication unit includes 4 Beidou antennas 14 as an example, 4 Beidous
4 USB serial ports in antenna 14 and the USBHUB hub 13 correspond.The USBHUB hub 13 is described in
After ARM9 microprocessor receives transmission data, distributed according to the state of multiple Beidou antennas to the Beidou with the free time
The corresponding USB serial ports of antenna.
The big-dipper satellite multi-antenna communication method that present embodiment provides, by being greater than single Beidou antenna to length
The communication data for the maximum text length that single is sent is split, and uses specific multiple antennas to the fragment data after fractionation
Data transmission format is encoded, and is formed several subdata packets, is improved the efficiency of Beidou satellite communication；And due to sending
End is provided with multiple Beidou antennas, sends the subdata packet using the idle Beidou antenna in multiple Beidou antennas, reduces
The waiting time that Beidou information is sent, further improve the communication efficiency of big-dipper satellite.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (2)
1. a kind of big-dipper satellite multi-antenna communication method, which comprises the steps of:
Step 1: providing a transmitting terminal including multiple Beidou antennas；
Step 2: the transmitting terminal is with receiving the communication data of user's input and the receiving end for receiving the communication data
Location, and judge whether the length of the communication data is greater than the maximum text length that the single Beidou antenna single is sent, if
It is then to be split to the communication data；The specific steps split to the communication data include:
The packet header sequence number number in the communication data is calculated using following formula 1:
The communication data is split as several segments identical as the packet header sequence number number and be arranged in order
According to；
Each fragment data packet is encoded using multi-antenna transmitting transport format, forms several subdata packets；It is described more
Antenna transmission format includes packet header sequence number, feedback marks position, fragment data and packet last sequence number；The packet header sequence number indicates
Position of the current clip data in the communication data；The feedback marks position is for judging whether current clip data are complete
It is whole, it when its value is 0, indicates that current clip data are complete, when its value is 1, indicates that current clip data are imperfect；The packet
Last sequence number is the latter place value of the packet header sequence number；
Step 3: successively detecting with the presence or absence of idle Beidou antenna in multiple Beidou antennas, if so, using the free time
The Beidou antenna successively sends the subdata packet to receiving end corresponding with the receiving end address.
2. big-dipper satellite multi-antenna communication method according to claim 1, which is characterized in that also wrapped in the subdata packet
Message SN is included, the message SN includes the sequence of message numbering and the Beidou antenna for sending the subdata packet
Number；The big-dipper satellite multi-antenna communication method further includes following steps:
The transmitting terminal judges whether to receive the confirmation message that the receiving end is sent, if so, judging the confirmation message
It is whether identical as the message SN in the subdata packet that it sends；If the transmitting terminal confirms that the confirmation message is sent with it
Subdata packet in message SN it is identical, then confirm that the subdata packet is sent successfully；The confirmation message includes described
The message SN in subdata packet that receiving end receives.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934751A (en) * | 2020-08-28 | 2020-11-13 | 中南民族大学 | Agricultural environment data acquisition system and method based on Beidou short message |
| CN112511215A (en) * | 2020-11-24 | 2021-03-16 | 泰斗微电子科技有限公司 | Data channel switching method and terminal equipment |
| CN112615659A (en) * | 2020-11-24 | 2021-04-06 | 泰斗微电子科技有限公司 | Data channel switching method and Beidou multichannel antenna |
| CN116405094A (en) * | 2023-04-14 | 2023-07-07 | 北京蔚海明祥科技有限公司 | Data transmission system and method based on multipath Tiantong communication equipment |
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| CN112615659A (en) * | 2020-11-24 | 2021-04-06 | 泰斗微电子科技有限公司 | Data channel switching method and Beidou multichannel antenna |
| CN116405094A (en) * | 2023-04-14 | 2023-07-07 | 北京蔚海明祥科技有限公司 | Data transmission system and method based on multipath Tiantong communication equipment |
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