CN108833274A - A kind of multi-link aggregated real-time data transmission system based on 4G mobile network - Google Patents
A kind of multi-link aggregated real-time data transmission system based on 4G mobile network Download PDFInfo
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- CN108833274A CN108833274A CN201810327484.9A CN201810327484A CN108833274A CN 108833274 A CN108833274 A CN 108833274A CN 201810327484 A CN201810327484 A CN 201810327484A CN 108833274 A CN108833274 A CN 108833274A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
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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
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
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Abstract
The invention proposes a kind of real-time data transmission systems of multi-link aggregated based on 4G mobile network, access public wireless net by different 4G operators and realize data parallel redundant transmission.Multiple 4G Radio Links are polymerize by control socket, are extended available bandwidth, improve the stability of message transmission rate and transmission by technical solution of the present invention.Simultaneously by raptor code in conjunction with multilink, and UDP transport protocol is used, can preferably meet the real time and reliability requirement of Unmanned Aerial Vehicle Data transmission.
Description
Technical field
The present invention relates to a kind of unmanned plane multilink concurrent transmission systems more particularly to a kind of based on the more of 4G mobile network
Link aggregation real-time data transmission system.
Background technique
It with the construction for moving 4G communication network and popularizes, being had become by mobile data network transmitting real-time data can
Energy.And public mobile communications network has big regional broadband seamless coverage characteristic, just becomes the new technology hand of UAV TT & C
Section, it is in widespread attention.
The data to be transmitted of Telemetry System of UAV have remote-control romote-sensing data and high-definition image data.Although single 4G terminal
Gross data upstream bandwidth can satisfy the requirement of measuring and control data real-time Transmission, but in practical applications, generally by base station
Row bandwidth contributions and the limitation of single operator's wireless signal network coverage, while unmanned plane chain in flight course
Acutely, upstream bandwidth is usually unable to satisfy the requirement of real-time Transmission stability for road variation, furthermore, it is understood that the CPU of equipment and interior
It deposits etc. and to provide far beyond operational capability needed for transmission data, in most cases all in idle state, and wireless network card
It is constantly in data and sends state.
Extensively, multiple 4G mobile networks are polymerize concurrent transmission, are conducive to by the universal height of 4G network for mobile communication base station covering
Improve broadband utilization rate.Therefore, the real-time data transmission system for inventing a kind of multi-link aggregated based on 4G mobile network, will be more
A plurality of mobile communication link on a carrier network is polymerize, and to improve bandwidth availability ratio, and ensures people's organization's link
Reliability, just become a urgent problem to be solved.
Summary of the invention
It is an object of the invention to break through the limitation of the prior art, a kind of multi-link aggregated based on 4G mobile network is provided
Real-time data transmission system, fully consider the bandwidth and unstable limitation when unmanned plane application 4G mobile network, will be multiple
Wireless channel polymerization, realizes the concurrent transmission of UAV TT & C's real time data.
Solution technical solution provided by the invention is as follows：
A kind of multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that including：Unmanned plane
Airborne multi-link aggregated transmitting terminal and ground monitoring receiving end, the airborne multi-link aggregated transmitting terminal will by control socket
2 or more 4G communication link polymerizations, data to be sent are sent in parallel to base station, the ground by aggregated wireless link
It monitors receiving end and socket completion data receiver is received by creation.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
Including：The airborne multi-link aggregated transmitting terminal encodes the data using Raptor fountain codes.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
It is described that 2 or more 4G communication links polymerizes by control socket, refer to and programmed by application layer, realize raw socket and
The IP address of 4G communication module is bound, and by operating socket, control coded data is received and dispatched from specified network interface card.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
It is described to be polymerize 2 or more 4G communication links by control socket, further include：Strategy is set by the way of matching source address
Routing rule, the source address of data packet is associated with the network interface card that it to be passed through, and by load balancing, realize 4G communication link
Polymerization.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
The policybased routing rule includes：Socket and the IP of 4G communication module are bound in application layer, establish multiple routing tables, then will
The IP address of some 4G network interface card link is as the source address for sending data packet by the network interface card.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
The load balancing determines the rotation weighted value of each 4G link according to each channel width service condition using weighted round robin, dynamic
Adjust the data packet traffic volume of each of the links.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
Carried out data transmission using UDP transport protocol.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
The unmanned aerial vehicle onboard multi-link aggregated transmitting terminal includes unmanned aerial vehicle onboard TT&C system, airborne 4G multilink module；Describedly
It includes ground 4G multilink module, ground receiver monitoring center that face, which monitors receiving end,.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
The 4G multilink module include measuring and control data acquisition/processing, raptor encoding and decoding, Socket set word connect, UDP message send/
It receives, wireless channel monitoring, 4G communication module.
Further, the multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that
The ground monitoring receiving end receives socket by creation and completes data receiver, including：Creation receives socket, monitors specified
All data packets for being sent to the port are stored in receiving cache queue, and carry out raptor decoding by receiving port, if decoding
Success, then according to the source address in data packet, received back confirmation message continues to data to slow if decoding is unsuccessful
Queue is rushed, until decoding is completed.
It is an advantage of the current invention that being polymerize multiple 4G Radio Links by control socket, available bandwidth is extended, is mentioned
The high stability of message transmission rate and transmission；By raptor code in conjunction with multilink, and UDP transport protocol is used,
Meet the real time and reliability transmission of Unmanned Aerial Vehicle Data, and without considering the sequencing problem that data packet sends and receives.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.Objectives and other advantages of the present invention can also be by written theory
Specifically noted structure is achieved and obtained in bright book, claims and attached drawing.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is real-time data transmission system structural schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the block diagram of airborne multi-link aggregated transmitting terminal provided in an embodiment of the present invention；
Fig. 3 is load balancing schematic diagram provided in an embodiment of the present invention；
Fig. 4 is Raptor coding schematic diagram provided in an embodiment of the present invention；
Fig. 5 is UDP message encapsulation schematic diagram provided in an embodiment of the present invention；
Fig. 6 is airborne multi-link aggregated transmitting terminal policybased routing rule block diagram provided in an embodiment of the present invention；
Fig. 7 is that ground monitoring center provided in an embodiment of the present invention receives block diagram.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.It should be noted that in the absence of conflict, in embodiments herein and embodiment
Feature can be combined with each other.
Embodiment one
A kind of multi-link aggregated real-time data transmission system based on 4G mobile network, including：Unmanned aerial vehicle onboard multilink
It polymerize transmitting terminal and ground monitoring receiving end, the airborne multi-link aggregated transmitting terminal is by controlling socket for 2 or more 4G
Communication link polymerization, data to be sent are sent in parallel to base station, the ground monitoring receiving end by aggregated wireless link
Socket, which is received, by creation completes data receiver.
Embodiment two
As shown in Figure 1, being a kind of real-time Data Transmission of the multi-link aggregated based on 4G mobile network provided by the invention
System structure diagram, system apply the Raptor fountain codes and Dynamic Data Allocation technology of forward error correction.
The 4G multi-link aggregated system includes：Unmanned aerial vehicle onboard multi-link aggregated transmitting terminal and monitoring receiving end.It is described
Unmanned aerial vehicle onboard multi-link aggregated transmitting terminal includes unmanned aerial vehicle onboard TT&C system, airborne 4G multilink module；The ground prison
Controlling receiving end includes ground 4G multilink module, ground receiver monitoring center.The multilink based on 4G mobile network is poly-
Close real-time data transmission system, which is characterized in that the 4G multilink module includes measuring and control data acquisition/processing, raptor volume
It decodes, Socket set word connects, UDP message transmission/reception, wireless channel monitoring, 4G communication module.
The airborne multi-link aggregated transmitting terminal, using the method for multi-link aggregated, by creating socket, by three 4G
Radio Link polymerization.The socket is realized on the application layer, creates three sockets IP address with three 4G network interface cards respectively
Policybased routing rule is added in binding by the way of matching source address, by operating socket, by data packet by specifying 4G link
It is sent to destination address.The method includes：
Step A：It when there is real time data to need to send, is encoded using raptor, generates to encode without code rate and wrap.
Step B：By creating socket socket, specific network interface card IP is bound, multiple routings are established.
Step C：To data packet addition source address, destination address, source port, destination port and service type, and match UDP
Transport protocol.
Step D：By operating socket, according to policybased routing and load-balancing algorithm, control data bag selects routing table,
It is sent to base station from specified 4G communication module respectively, the specified reception at ground monitoring center is then transmitted to by core network
The concurrent transmission of data is realized in port.
The Dynamic Data Allocation technology monitors radio channel state by monitoring module, manages currently available network interface card column
Table refreshes routing rule, using load-balancing algorithm and carries out data transmission distributing control.
Ground monitoring center creation receives socket, monitor specified receiving port, obtains all ports that are sent to
UDP message packet.Received data packet is put into buffering queue, raptor decoding is carried out, and after successfully decoded, according in data packet
Source address, return reception state.
Embodiment three
On the basis of example 2, airborne 4G multilink module data to be sent, pass through movement, connection, telecommunications
4G aggregated wireless link, be sent in parallel to base station, ground 4G multilink module passes through cable network or wireless network, receives
The measuring and control data forwarded by base station, and in ground monitoring center display control.
As shown in Fig. 2, Raptor coding module is controlled by monitoring module when there is raw data file to need to send, it is right
Original data stream is encoded, and is constantly generated without code rate data packet；Each network card status is detected by monitoring module, creates original set
Word is connect, and is bound respectively with the dynamic IP addressing of three network interface cards, multiple routing rules are established；According to load-balancing algorithm, will count
According to packet after socket is stated, udp header and IP agreement head are added, constructs UDP message packet；Then it is advised using policybased routing
Corresponding 4G communication module then is sent by UDP message packet, base station is sent to from specified 4G communication module respectively, then passes through
Core network is transmitted to the specified receiving port at ground monitoring center, realizes the concurrent transmission of data.
The monitoring module detects and refreshes network interface card link condition, obtains the dynamic IP addressing of three 4G network interface cards, for creation
Raw socket provide binding IP address；When there is new network card equipment to be added to transmission end, dialing keeps it online and updates
Currently available network interface card list；When receiving the successfully decoded message in ground monitoring center, control raptor coding module is given up
Present encoding block carries out next data encoding.
The load balancing, as shown in Figure 3.Using weighted round robin load balancing, three communication link rotation is made to send UDP
Data packet is to ground monitoring center.The load-balancing algorithm that the present invention uses, according to the feedback characteristics of channel, each road of real-time judge
The bandwidth usage of channel determines the weighted value of each link, and the dynamic data packet traffic volume for adjusting each of the links improves
Parallel transmission efficiency.
Raptor code is one kind of fountain codes, and fountain codes are that code rate is unrelated, the symbol generated by source file by coding
Number is unrestricted, can produce infinite number of symbol.The coding of Raptor code encodes two processes by precoding and LT, prelists
K source data packet is encoded into K+L intermediate character by correcting and eleting codes by code, then using intermediate character as the input of LT encoder
Character carries out secondary coding, obtains the coding packet of Raptor code.Fig. 4 is Raptor coding schematic diagram.
After creation receives socket, according to load-balancing algorithm, data packet is stated on socket, and then determines this
Secondary transmission data institute network interface card to be used.It is that Raptor coded data packet adds UDP head in transport layer according to upper level applications
Portion, including source port, destination port, agreement and data length etc..Then in network layer, according to the corresponding information of transmission network interface card
The head IP, including source address, destination address, agreement etc. are filled, last data packet to be sent is formed, finally by data packet through spy
Fixed network interface card is sent.Fig. 5 is UDP message encapsulation schematic diagram.
Utilization strategies routing, we can extremely flexibly carry out routing rule configuration.First in application layer by socket
It is bound with the IP of 4G communication module, establishes multiple routing tables, then using the IP address of some 4G network interface card link as passing through the net
Card sends the source address of data packet, as policybased routing rule by way of matching source address.UDP message packet first passes around base
Corresponding routing table is selected in the policybased routing rule of source address, further according to routing table matching rule, by data from the 4G network
Interface is sent to ground monitoring center.Fig. 6 is airborne multi-link aggregated transmitting terminal policybased routing rule.
Fig. 7 is that ground monitoring center receives block diagram.Creation receives socket first, monitors specified receiving port, will own
The data packet for being sent to the port is stored in receiving cache queue, and carries out raptor decoding, if successfully decoded, according to data
Source address in packet, received back confirmation message continue to data to buffering queue, until decoding if decoding is unsuccessful
It completes.Finally data are further processed in monitoring center.
In conclusion multiple 4G Radio Links are polymerize by the present invention by control socket, available bandwidth is extended, is improved
The stability of message transmission rate and transmission；By raptor code in conjunction with multilink, and use UDP transport protocol, nothing
Connection need to be established, postpones that small, data transmission efficiency is high in data transmission procedure, meets the real time and reliability of Unmanned Aerial Vehicle Data
Transmission；When receiving end carries out the decoding of raptor code, without considering the sequencing problem of data receiver, when further shortening decoding
Between.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of multi-link aggregated real-time data transmission system based on 4G mobile network, which is characterized in that including：Unmanned plane machine
Multi-link aggregated transmitting terminal and ground monitoring receiving end are carried, the airborne multi-link aggregated transmitting terminal is by controlling socket for 2
A above 4G communication link polymerization, data to be sent are sent in parallel to base station, the ground prison by aggregated wireless link
It controls receiving end and socket completion data receiver is received by creation.
2. the multi-link aggregated real-time data transmission system according to claim 1 based on 4G mobile network, feature exist
In, including：The airborne multi-link aggregated transmitting terminal encodes the data using Raptor fountain codes.
3. the multi-link aggregated real-time data transmission system according to claim 1 or 2 based on 4G mobile network, feature
It is, it is described to be polymerize 2 or more 4G communication links by control socket, refer to and programmed by application layer, realizes original set
The IP address for connecing word and 4G communication module is bound, and by operating socket, control coded data is received and dispatched from specified network interface card.
4. the multi-link aggregated real-time data transmission system according to claim 3 based on 4G mobile network, feature exist
In, it is described to be polymerize 2 or more 4G communication links by control socket, further include：It is set by the way of matching source address
Policybased routing rule, the source address of data packet is associated with the network interface card that it to be passed through, and by load balancing, realize 4G communication
The polymerization of link.
5. the multi-link aggregated real-time data transmission system according to claim 4 based on 4G mobile network, feature exist
In the policybased routing rule includes：Socket and the IP of 4G communication module are bound in application layer, establish multiple routing tables,
Again using the IP address of some 4G network interface card link as the source address for sending data packet by the network interface card.
6. the multi-link aggregated real-time data transmission system according to claim 4 based on 4G mobile network, feature exist
In, the load balancing determines the rotation weighted value of each 4G link according to each channel width service condition using weighted round robin,
Dynamic adjusts the data packet traffic volume of each of the links.
7. the multi-link aggregated real-time data transmission system according to claim 6 based on 4G mobile network, feature exist
In being carried out data transmission using UDP transport protocol.
8. the multi-link aggregated real-time data transmission system according to claim 1 or 2 based on 4G mobile network, feature
It is, the unmanned aerial vehicle onboard multi-link aggregated transmitting terminal includes unmanned aerial vehicle onboard TT&C system, airborne 4G multilink module；Institute
Stating ground monitoring receiving end includes ground 4G multilink module, ground receiver monitoring center.
9. the multi-link aggregated real-time data transmission system according to claim 8 based on 4G mobile network, feature exist
In the 4G multilink module includes measuring and control data acquisition/processing, raptor encoding and decoding, Socket set word connects, UDP message is sent out
It send/receives, wireless channel monitoring, 4G communication module.
10. the multi-link aggregated real-time data transmission system according to claim 2 based on 4G mobile network, feature exist
In, the ground monitoring receiving end receives socket by creation and completes data receiver, including：Creation receives socket, monitors
Specified receiving port, all data packets for being sent to the port is stored in receiving cache queue, and carry out raptor decoding, if
Successfully decoded, then according to the source address in data packet, received back confirmation message continues to data if decoding is unsuccessful
To buffering queue, until decoding is completed.
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| CN110391837A (en) * | 2019-07-04 | 2019-10-29 | 苏州光之翼智能科技有限公司 | A kind of long-haul reliable data communication system of unmanned plane |
| CN111698019A (en) * | 2020-04-30 | 2020-09-22 | 中国卫通集团股份有限公司 | Resource pool architecture measurement and control station network system based on routing table |
| WO2023108492A1 (en) * | 2021-12-15 | 2023-06-22 | 华为技术有限公司 | Communication method and apparatus |
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Application publication date: 20181116 |