CN105490729B - A kind of one-to-many data transmission system and method based on satellite link - Google Patents
A kind of one-to-many data transmission system and method based on satellite link Download PDFInfo
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- CN105490729B CN105490729B CN201510845312.7A CN201510845312A CN105490729B CN 105490729 B CN105490729 B CN 105490729B CN 201510845312 A CN201510845312 A CN 201510845312A CN 105490729 B CN105490729 B CN 105490729B
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Abstract
The invention discloses a kind of one-to-many data transmission system and method based on satellite link, according to the number of the bandwidth and corresponding receiving point of the data of each mission payload generation, procotol is selected for the data that each mission payload generates, the packing of mission payload network data is carried out according to the procotol of selection and is sent into the specified network interface of onboard networks interchanger；Big band data is transmitted using UDP multicast protocols, small band data is transmitted using the point-to-point propagation protocols of TCP/IP or UDP；When UDP multicast protocols data and point-to-point propagation protocol data exist simultaneously, virtual network VLAN divisions are carried out；By the present invention in that with virtual network and flexibly selecting procotol, the signal that multiple data receivers may be implemented receives, and can solve when the data such as unmanned plane generate end and realize air-ground dialogue using satellite communication link, the larger problem of data occupied bandwidth.
Description
Technical field
The present invention relates to a kind of one-to-many data transmission system and method based on satellite link, and in particular to it is a kind of nobody
The airborne big band data of machine completes the method and system of multipoint reception by satellite link.
Background technology
UAV system can realize auto-flare system, complete the functions such as remote measuring and controlling, multivariate data passback, rely primarily on it
Measurement and control link subsystem；At this stage, measurement and control link subsystem is broadly divided into sighting distance landing system and satellite communication system
System, in the unmanned plane application of early stage, since task radius is smaller, task platform flying height is higher, conventional sighting distance landing
TT＆C system can meet observing and controlling and data back of the unmanned plane in operation area, however as pushing away for the civilian industry of unmanned plane
Extensively, sighting distance TT＆C system can no longer meet the application of unmanned plane operation area, its advantageous advantage energy of satellite communication link
Enough support civil nature UAV system develop towards lower, farther, more diversification data transmission direction.The ultraphotic of satellite communication
Making it gradually away from application characteristic becomes the primary selection of all kinds of remote control telemetry systems.Current unmanned plane satellite communication link
Mostly use one-to-one data-transmission mode, it is only necessary to determine that satellite data bandwidth provides according to data bandwidth summation needed for ground
Source, the example received using the more ground points of satellite is more rare, even if only by part narrow band data if having the requirement of multiple spot landing
Passed under branch, bandwidth will not be caused to block.
In recent years, the application demand for the data progress ground multipoint reception that unmanned plane is forwarded by satellite is more and more, so
And in actual use it is not difficult to find that unmanned plane generate big band data due to its transient data amount it is big, almost account for sometimes
According to entire satellite bandwidth resource, although satellite is only to provide the data channel of transparent transmission, in channel by be still to need
Will be with the frame format of certain agreement, to ensure the accuracy of communication and distinguishing terrestrial user, conventional satellite link mainly uses
The data framework of TCP/IP, at this time if there is big band data simultaneously multipoint reception when, the difference of target ip address information can go out
There is the case where multichannel big band data in existing channel, causes channel block.
Invention content
The technical problem to be solved by the present invention is to a kind of big band data such as unmanned plane based on satellite link is one-to-many
The system and method for transmission can ensure in the case where carrying out big band data multicast communication and make full use of satellite data
Under conditions of link circuit resource, it is effectively increased the client terminal quantity on ground, meets requirement of the user to data cloud service mode.
The present invention includes following technical solution：
A kind of system of the Unmanned Aerial Vehicle Data multicast communication based on satellite link, including unmanned aerial vehicle onboard end, carry satellite
The communication relay satellite and multiple ground receivers point of relay antenna, unmanned aerial vehicle onboard end includes all mission payloads, onboard networks
Protocol self-adapting conversion module, onboard networks interchanger, airborne modem and airborne antenna for satellite communication in motion；Each ground receiver
Point includes that ground satellite antenna, surface modem, the ground surface end network switch and ground surface end network receive client terminal；Nothing
Man-machine airborne end and multiple data receivers are in the same LAN segment set up by satellite wireless communication channel；Ground surface end net
Network receives the point-to-point propagation protocols of client terminal compatibility TCP/IP, the point-to-point propagation protocols of UDP and UDP multicast protocols；
The data that each mission payload of unmanned plane generates are sent into onboard networks protocol self-adapting conversion module；
The bandwidth for the data that onboard networks protocol self-adapting conversion module is generated according to each mission payload and corresponding ground
The number of receiving point selects procotol for the data that each mission payload generates, is appointed according to the procotol of selection
Business load network data is packaged and is sent into the specified network interface of onboard networks interchanger；When the data that a certain mission payload generates
When bandwidth is multiplied by the corresponding ground receiver point number of the mission payload more than satellite link total bandwidth, the number of mission payload generation
Mission payload network data packing is carried out using UDP multicast protocols according to by selection, when the data bandwidth that a certain mission payload generates
When being multiplied by the corresponding ground receiver point number of the mission payload no more than satellite link total bandwidth, the data of mission payload generation
Mission payload network data packing is carried out using the point-to-point propagation protocols of TCP/IP or UDP by selection；
Mission payload network data that onboard networks interchanger is exported according to onboard networks protocol self-adapting conversion module and
Determine whether to carry out virtual network division and generate using the aircraft state network data of the point-to-point propagation protocols of TCP/IP or UDP
The aircraft state data that the virtual network of generation divides is added to the aircraft shape by the aircraft state data that virtual network divides
State network data；The aircraft state network data and mission payload network data are carried out data exchange by onboard networks interchanger
After be sent to airborne modem；
Radiofrequency signal is taken out and be converted to all data by airborne modem from onboard networks interchanger, is sent into airborne
Antenna for satellite communication in motion reaches the communication relay satellite by airborne antenna for satellite communication in motion；
Multiple ground receiver points receive the radiofrequency signal for coming from communication relay satellite and pass through modulated terrestrial solution simultaneously
Device is adjusted to be converted to network format data and be sent into the ground surface end network switch, the ground surface end network switch is divided according to virtual network
Status data judge whether to virtual network division；
Ground surface end network receives client terminal and carries out procotol frame head to the data for coming from the ground surface end network switch
Judge, data interpretation is carried out according to agreement frame head judging result.
Mission payload network data that onboard networks interchanger is exported according to onboard networks protocol self-adapting conversion module and
Judge whether to exist simultaneously UDP multicast protocol numbers using the aircraft state network data of the point-to-point propagation protocols of TCP/IP or UDP
According to point-to-point propagation protocol data, when UDP multicast protocols data and point-to-point propagation protocol data exist simultaneously, airborne net
Network interchanger carries out virtual network VLAN divisions, and the interface of wherein modem access is set as trunk mouthfuls, UDP multicasts association
View data occupy a virtual network group, and point-to-point propagation protocol data occupy another virtual network group；Two virtual networks
The data of group carry out logic isolation, can not achieve communication；When UDP multicast protocols data and point-to-point propagation protocol data difference
In the presence of, onboard networks interchanger is divided without virtual network.
Onboard networks protocol self-adapting conversion module include mission payload data bandwidth and receiving point number identification module and
What data network protocol packetization module, mission payload data bandwidth and receiving point number identification module were generated according to each mission payload
The number of the bandwidth of data and corresponding ground receiver point selects procotol for the data that each mission payload generates；Institute
The number for stating the corresponding ground receiver point of each mission payload data is determined according to ground remote information；
Data network protocol packetization module opens up corresponding spatial cache according to the data volume of each mission payload, and according to appointing
Net is added to each mission payload data in the procotol subpackage of load data bandwidth of being engaged in and the selection of receiving point number identification module
Network protocol package frame originating point information, the data by packing are sent into the dedicated tunnel interface of onboard networks interchanger.
The data that each mission payload of unmanned plane generates include digitized photoelectric image data, high definition picture data, number
Voice data and radar return data.
The onboard networks interchanger and ground network interchanger are 2 layer network interchangers.
A method of the Unmanned Aerial Vehicle Data multicast communication based on satellite link includes the following steps：
(1) each mission payload generates data；
(2) number of the bandwidth and corresponding ground receiver point of the data generated according to each mission payload, for each
The data that load of being engaged in generates select procotol, and mission payload network data packing is carried out according to the procotol of selection；When certain
The data bandwidth that one mission payload generates is multiplied by the corresponding ground receiver point number of the mission payload and is more than satellite link total bandwidth
When, the data which generates carry out network data packing by selection using UDP multicast protocols, when a certain mission payload produces
When raw data bandwidth is multiplied by the corresponding ground receiver point number of the mission payload no more than satellite link total bandwidth, which carries
The data that lotus generates carry out network data packing by selection using the point-to-point propagation protocols of TCP/IP or UDP；
(3) fly according to the mission payload network data of all packings and using the point-to-point propagation protocols of TCP/IP or UDP
Whether machine state network data judging carries out virtual network division and generates the aircraft state data of virtual network division, will generate
Virtual network divide aircraft state data be added to the aircraft state network data；By the aircraft state network data
Data exchange is carried out with mission payload network data；
(4) it is sent to satellite after the data after exchange being modulated demodulation, the multiple receiving points in ground are forwarded to by satellite；
(5) aircraft state data that the multiple receiving points in ground demodulate the data of reception, divided according to virtual network
The interface of the ground surface end network switch is set, and the data to coming from the ground surface end network switch carry out procotol frame head and sentence
It is disconnected, data interpretation is carried out according to agreement frame head judging result.
A kind of one-to-many data transmission system based on satellite link, including a data generate end, carry satellite antenna
Communication relay satellite and multiple data receivers；It includes multiple timess that can generate different bandwidth data that the data, which generate end,
Load, the adaptive conversion module of procotol, the data of being engaged in generate the end network switch, data generate end modem and data
End satellite antenna is generated, each data receiver includes receiving terminal satellite antenna, receiving terminal modem, the friendship of receiving terminal network
It changes planes, receiving terminal network receives client terminal；The data that each mission payload generates have the data receiver for the number that is corresponding to it
End receives；Data generate end and multiple data receivers in same LAN segment；Receiving terminal network receives client terminal compatibility
The point-to-point propagation protocols of TCP/IP, the point-to-point propagation protocols of UDP and UDP multicast protocols；
The data bandwidth and corresponding data receiver that the adaptive conversion module of procotol is generated according to each mission payload
Number is that the data that corresponding mission payload generates select procotol, carry out mission payload network according to the procotol of selection
Data are packaged and are sent into the specified network interface that data generate the end network switch；When the data bandwidth that a certain mission payload generates
When being multiplied by the corresponding receiving terminal number of the mission payload more than satellite link total bandwidth, the data which generates use
UDP multicast protocols carry out mission payload network data packing, are carried when the data bandwidth that a certain mission payload generates is multiplied by the task
When the corresponding receiving terminal number of lotus is not more than satellite link total bandwidth, the data which generates use TCP/IP by selection
Or the point-to-point propagation protocols of UDP carry out mission payload network data packing；
Data generate mission payload network data of the end network switch according to the adaptive conversion module output of procotol
It is divided simultaneously with whether the generation end state network data judging using the point-to-point propagation protocols of TCP/IP or UDP carries out virtual network
The status data that virtual network divides is generated, the status data that the virtual network of generation divides is added to generation end state
Network data；Data generate the end network switch by generation end state network data and mission payload network data into line number
End modem is generated according to data are sent to after exchange；
Data generate end modem and all-network data are taken out and are converted to from the data generation end network switch
Radiofrequency signal is sent into data and generates end satellite antenna, and data generate end satellite antenna and reach the communication relay satellite, by logical
Letter repeater satellite is sent to multiple data receivers；
Multiple data receivers receive the signal and process of communication relay satellite transmission by receiving terminal satellite antenna simultaneously
Receiving terminal modem is converted to network format data, is sent into the receiving terminal network switch, the receiving terminal network switch according to
The status data that virtual network divides judges whether to virtual network division, and ground surface end network receives client terminal to coming from
The data of the receiving terminal network switch carry out agreement frame head judgement, and data interpretation is carried out according to agreement frame head judging result.
The present invention has the following advantages that compared with prior art：
By the present invention in that with virtual network and flexibly selecting procotol, the signal of multiple data receivers may be implemented
It receives, can solve when the data such as unmanned plane generate end and realize air-ground dialogue using satellite communication link, occupied bandwidth is larger
Data the problem of.The system and method that the present invention uses can make multiple data receivers while receive data generation end production
The big band datas such as raw HD video data, radar return data, data receiver number is unrestricted, and big band data
Itself is also only related with satellite link bandwidth resource, and the big band data that satellite forwards is made to be no longer influenced by the pact of one-to-one application
Beam.
Description of the drawings
Fig. 1 is that the big band data of UAV system lands system composition schematic diagram by satellite link multiple spot；
Fig. 2 is onboard networks protocol self-adapting conversion module composition schematic diagram；
Fig. 3 is that the big band data of UAV system lands working-flow figure by satellite link multiple spot；
Fig. 4 is a kind of composition schematic diagram of the one-to-many data transmission system based on satellite link.
Specific implementation mode
Just the present invention is described further in conjunction with attached drawing below.
The mode that existing satellite communication process mostly uses IP network realizes data exchange, and satellite communication link only provides can
Be considered as the channel of transparent transmission, thus how to select procotol, rationally using interchanger be configured as realization UAV system it is big
The key that band data is landed by satellite link multiple spot.
As shown in Figure 1, a kind of system of Unmanned Aerial Vehicle Data multicast communication based on satellite link of the present invention, including nobody
The airborne end of machine, the communication relay satellite with satellite relay antenna and multiple ground receivers point, unmanned aerial vehicle onboard end include all
Mission payload, onboard networks protocol self-adapting conversion module, onboard networks interchanger, airborne modem and airborne communication in moving
Antenna；Each ground receiver point includes ground satellite antenna, surface modem, the ground surface end network switch and ground surface end net
Network receives client terminal；Unmanned aerial vehicle onboard end and multiple data receivers in same LAN segment, the LAN by satellite without
Line communication channel composition is established；Ground surface end network receives client terminal and is compatible with TCP, UDP and UDP multicast protocol；
The data that airborne each mission payload of unmanned plane generates are sent into onboard networks protocol self-adapting conversion module.Airborne task
Load is mainly included in the sensor device that unmanned plane during flying executes absolutely empty vacant lot task in the process, and each mission payload passes through each
The data of different bandwidth, different-format can be exported from data-interface：Data may include digitized photoelectric image data, height
Clear picture data, digital voice data, radar return data etc..
The data bandwidth and ground receiver place that onboard networks protocol self-adapting conversion module is generated according to each mission payload
Number, for each mission payload generate data select procotol, according to the procotol of selection carry out mission payload
Network data is packaged, and the summation of all data bandwidths needs to be less than satellite communication link bandwidth, data are then sent into airborne net
The specified network interface of network interchanger；The procotol includes that common TCP/IP is point-to-point, UDP is point-to-point, UDP networks
Multicast isotype.
Mission payload network data that onboard networks interchanger is exported according to onboard networks protocol self-adapting conversion module and
Determine whether to carry out virtual network division using the aircraft state network data of TCP/IP or UDP point-to-point protocols, and generates void
The aircraft state data that quasi- network divides is added to the aircraft state network data；Onboard networks interchanger is by the aircraft shape
State network data and mission payload network data are sent to airborne modem after carrying out data exchange.
Radiofrequency signal is taken out and be converted to all data by airborne modem from onboard networks interchanger, is sent into airborne
Antenna for satellite communication in motion reaches the communication relay satellite by airborne antenna for satellite communication in motion.
Multiple ground receiver points receive the radiofrequency signal for coming from communication relay satellite and pass through modulated terrestrial solution simultaneously
Device is adjusted to be converted to network format data and be sent into the ground surface end network switch, the ground surface end network switch is divided according to virtual network
Status data judge whether to virtual network division.
The onboard networks interchanger and the ground surface end network switch need to have certain functional requirement, it is desirable that interchanger
With divide virtual network, can transparent transmission disparate networks agreement, have enough multiplex roles, each interface with 10/100/
Tri- mould adaptability of 1000Mbps etc..Preferably, the onboard networks interchanger and ground network interchanger are that 2 layer networks are handed over
It changes planes.
Each ground receiving point regards application demand and specific ground surface end network is received client terminal access ground surface end network exchange
Machine specified interface simultaneously carries out relevant using data processing.The network of ground surface end receives client terminal and can not predict other termination
Number, thus also can not the network protocol format of pre- primary data when arriving, the data reception module of client terminal can built-in one
The function of a automatic identification procotol can judge the frame head of a variety of different network protocols, be sentenced according to agreement frame head
Disconnected result carries out data interpretation.
Onboard networks protocol self-adapting conversion module be mainly based upon a certain circuit-switched data itself amount of bandwidth and ground it is distant
The pick-up point number that information provides is controlled to determine to carry out specific network protocols packing to signal all the way, it is generally the case that big bandwidth
Data can use UDP multicast modes by selection, because in this manner, group only need to be added in the frame head agreement of big band data
Address is broadcast, all network interfaces can carry out data receiver by this multicast address in LAN, if using such as
The Point-to-Point Data mode of TCP/IP is required to one IP address of distribution then for ground receiver place different in LAN,
This requires that airborne big band data will be separately added into the frame structure of different target IP address, when multidrop points needs data
When asking time delay there are certain requirements and needing synchronous carry out, it just will appear the case where may exceeding satellite communication resource bandwidth.
Know as shown in Fig. 2, onboard networks protocol self-adapting conversion module includes mission payload data bandwidth and landing points
Other module and data network protocol packetization module；Mission payload data bandwidth and receiving point number identification module are carried according to each task
The number of the bandwidth and corresponding ground receiver point of the data that lotus generates selects network for the data that each mission payload generates
Agreement；Data network protocol packetization module opens up corresponding spatial cache, and pair of subpackage according to the data volume of each mission payload
Procotol packet frame originating point information is added in each mission payload data, and the data by packing are sent into the specified logical of onboard networks interchanger
Pipeline joint.
Mission payload data bandwidth and landing points identification module can confirm used procotol according to following rule：
1) data bandwidth × corresponding ground receiver point number≤satellite link total bandwidth that mission payload generates, then it is optional
Select the agreement of TCP/IP or UDP point-to-point transmission.The selection of TCP/IP and UDP point-to-point transmission is needed according to specifically used requirement
Condition, when stability and reliability requirement higher of the user to data transmission, it is proposed that ICP/IP protocol is used, when user's logarithm
It is not high according to reliability requirement and when delay requirement is smaller, it is proposed that use UDP point-to-point protocols；
2) data bandwidth × corresponding ground receiver point number ＞ satellite link total bandwidths that mission payload generates, then it is optional
Select UDP multicast protocols；It is considered big band data at this time.
The communication relay satellite link total bandwidth is by airborne antenna for satellite communication in motion, airborne modem, communication relay
The bandwidth enabling capabilities of satellite, ground satellite antenna, surface modem etc. determine.All mission payload institutes worked at the same time
Need bandwidth summation (including the case where considering multiple satellite ground receiving points) that communication relay satellite used need to be less than at any time
Link total bandwidth.
Data network protocol packetization module is characterized mainly in that its independence being relatively isolated, that is, it is true to pass through procotol
The mission payload data result recognized is had respectively entered in the different autonomous channels of data network protocol packetization module.Each channel
Procotol content can be configured according to the procotol of derived data, and the information such as IP address therein, port, single packet length are advance
Agreement, the function that module is realized are to add network packet header to each channel data, and data export by the way of network interface, convenient for connecing
Enter onboard networks interchanger.
Since the airborne adaptive conversion module of procotol can be by independent data channel by different network protocol
Mission payload data access onboard networks interchanger, while being also possible to access some ground surface ends on onboard networks interchanger and needing to grow
Aircraft state parameter of time monitoring etc., wherein having the data flow using agreements such as TCP/IP or UDP.It is with ICP/IP protocol
Example, according to the basic theory of network protocol layer, TCP/IP is carried out data transmission more by wrapping small segment data, i.e., each bag data meeting
Packet serial number is added in frame head, splices again by packet serial number in destination.Therefore in hardware realization, the mould of TCP/IP transmission is carried out
Block can generally open up a suitable spatial cache and determine whether the packet serial number that sends before continuous for shaking hands, by source and
The confirmation repeatedly of destination just can ensure that data transmission is correct.However when accessing UDP multicast packets on interchanger, due to multicast
There is no specific destinations for mode, then each interface on interchanger can constantly receive UDP multicast packets, TCP/
The hardware of IP data-interfaces its spatial cache before carrying out processing and judging can be filled up by UDP multicast packets for a long time, cause TCP/IP
Destination feedback signal discontinuous reception or can not even receive, will result in this way when on the network switch while there is TCP/
When IP and UDP multicast packets, the abnormal situation of TCP/IP data, it is therefore desirable to by point pair by way of virtual network division
Point propagation protocol data and UDP multicast protocols are kept apart.
The task that onboard networks interchanger onboard networks interchanger is exported according to onboard networks protocol self-adapting conversion module
Load network data and the aircraft state network data for using the point-to-point propagation protocols of TCP/IP or UDP, judge whether to deposit simultaneously
In UDP multicast protocols data and point-to-point propagation protocol data, when UDP multicast protocols data and point-to-point propagation protocol data are same
When in the presence of, onboard networks interchanger carry out virtual network VLAN divisions, wherein modem access interface be set as
Trunk mouthfuls, UDP multicast protocol data occupy a virtual network group, and point-to-point propagation protocol data occupy another virtual net
Network group；The data of two virtual network groups carry out logic isolation, can not achieve communication；When UDP multicast protocols data and point-to-point
In the presence of when propagation protocol data difference, onboard networks interchanger is divided without virtual network.Such as it is the reliable of guarantee system,
Also the protocol data of the point-to-point propagation of TCP and UDP can be respectively placed in two virtual network groups.It, can be complete by this operation
Avoid airborne big band data to receiving data network protocol packetization module in onboard networks protocol self-adapting conversion module entirely
The impact of caching, while also can guarantee that big band data passes through the reception of satellite link ground multiple spot.
As shown in figure 3, a kind of method of Unmanned Aerial Vehicle Data multicast communication based on satellite link of the present invention, including it is as follows
Step：
1 data generated according to each mission payload of current unmanned plane, are sent each data to onboard networks using distinct interface
Protocol self-adapting conversion module；
The number of the bandwidth and corresponding ground receiver point of 2 data generated according to each mission payload is each task
The data that load generates select procotol, and mission payload network data packing is carried out according to the procotol of selection；It will be packaged
Data afterwards respectively enter specified network interface；
The 3 mission payload network datas according to all packings and the aircraft using the point-to-point propagation protocols of TCP/IP or UDP
Whether state network data judging carries out virtual network division and generates the aircraft state data of virtual network division, by generation
The aircraft state data that virtual network divides is added to the aircraft state network data；By the aircraft state network data and
Mission payload network data carries out data exchange；
After data after exchange are modulated demodulation by 4, satellite is forwarded to ground；
5 data forwarded according to satellite, ground receive and are demodulated by satellite earth antenna, are drawn according to virtual network
The interface of the aircraft state data setting ground surface end network switch divided, and the data after exchange are sent to each application terminal；
6 ground surface end networks receive client terminal and carry out procotol frame head to the data for coming from the ground surface end network switch
Judge, data interpretation is carried out according to agreement frame head judging result.
Embodiment
UAV system end carry multiple-task load, including high definition O-E Payload, voice trunking radio station etc., high definition photoelectricity
Load exports 1080p high-definition image data, and for data bandwidth requirements at least more than 2Mbps, voice trunking radio station is to ensure high-fidelity
And other operation redundancies, it is desirable that data bandwidth requirements are at least more than 1Mbps.Unmanned plane is constrained by cabinet size and power supply, only
The airborne antenna for satellite communication in motion that 4Mbps bandwidth is provided and airborne modem can be used.A total of 3 grounded receiving stations.User
It is required that ground surface end needs three ground to watch airborne high-definition image simultaneously, ground needs receive digitlization voice trunking data.It needs
It is noted that the information such as all addresses TCP/IP used, UDP multicast address, port numbers are to appoint in advance in system
's.
(1) bandwidth analysis and procotol determine
If 2Mbps high-definition image data need three ground to receive, needs to use UDP multicast protocols, digitize voice trunking number
According to being then point-to-point transmission, may be selected to use ICP/IP protocol, open up TCP handshaking information spatial caches 8Kbit, the above judgement and
Operation is carried out in onboard networks protocol self-adapting conversion module, is added for 2Mbps by the data of satellite communication link
The digitlization voice trunking data of ICP/IP protocol are added in the high-definition image data and 1Mbps of UDP multicast network agreements, need altogether
The support of 3Mbps bandwidth, the 4Mbps satellite communication link bandwidth being capable of providing less than system.All data enter onboard networks friendship
It changes planes, the network interface that high-definition image data access interchanger number is 2, digitlization voice trunking data access interchanger number is 3
Network interface, modem access switch number be 1 network interface.
(2) network switch configuration mode
When high-definition image data enter interchanger by 2 mouthfuls, 1 mouthful and 3 mouthfuls can also be connected to image data information, due to image
Information is successive and broadcast type, when 8Kbit caches president in 3 mouthfuls of digitlization voice trunking data ICP/IP protocol stack
Between it is occupied, feedback packet can not be connected to therefore cause communication open circuit, the information channel of 1 mouthful of modem as transparent transmission
On this without influence.Therefore to meet when using UDP multicast transmission image datas, other application network interface (such as voice data network interface)
Still it can be used normally, need the network switch to configure virtual network, i.e., be set as two logic isolations by 2 mouthfuls and 3 mouthfuls
Virtual net group can not achieve logic intercommunication between two mouthfuls, and such 2 mouthfuls of image data does not just interfere with 3 mouthfuls of voice data, together
When 2 mouthfuls and 3 mouthfuls of data be required to use 1 mouthful of transparent transmission information channel, then need to be set as trunk mouthfuls by 1 mouthful, expression can be with
Receive the data of all virtual net groups.
(3) the reception mode of ground client terminal
Enter the data of modem by airborne antenna for satellite communication in motion, communication relay satellite, ground by 1 oral instructions of interchanger
The Sequential Link node of satellite antenna, surface modem and ground interchanger reaches ground client terminal, and ground client is whole
End is connected on the interchanger of ground and is loaded with respective application software, i.e. high definition O-E Payload monitor terminal is loaded with video flowing
Media player, voice communication terminal are loaded with voice transmitting-receiving software and match PTT phones.But high definition O-E Payload terminal is simultaneously at this time
Do not know that high-definition data is exported with which kind of agreement from interchanger, therefore the data reception module needs of DST PLAYER software make
The mode judged with frame head judges that data are TCP/IP or UDP (multicast containing UDP) agreement simultaneously, and is interpreted.
The present invention has stronger universality, is not limited to a certain unmanned plane application scenarios and certain a unmanned plane
Type, various unmanned aerial vehicle platforms can apply the present invention and system, meanwhile, the thought and sky of system group network in the present invention
The theory of ground multiple spot information sharing and interconnection can also be applied in other space communication systems.Such as unmanned plane can change into
The data that people's aircraft, guided missile, ground attack vehicle etc. can generate big band data generate end.Multiple ground receiver points can also
Change other types of data receiver into.
As shown in figure 4, being another embodiment of the invention, a kind of one-to-many data transmission system based on satellite link
System includes that a data generate end, the communication relay satellite with satellite antenna and multiple data receivers；The data generate
End includes multiple mission payloads that can generate different bandwidth data, the adaptive conversion module of procotol, data generation end net
Network interchanger, data generate end modem and data generate end satellite antenna, and each data receiver includes that receiving terminal is defended
Star antenna, receiving terminal modem, the receiving terminal network switch, receiving terminal network receive client terminal；Each mission payload
There is the data of generation the data receiver for the number that is corresponding to it to receive；Data generate end and multiple data receivers in same office
In the network segment of domain；Receiving terminal network receive the point-to-point propagation protocols of client terminal compatibility TCP/IP, the point-to-point propagation protocols of UDP and
UDP multicast protocols；
The data bandwidth and corresponding data receiver that the adaptive conversion module of procotol is generated according to each mission payload
Number is that the data that corresponding mission payload generates select procotol, carry out mission payload network according to the procotol of selection
Data are packaged and are sent into the specified network interface that data generate the end network switch；When the data bandwidth that a certain mission payload generates
When being multiplied by the corresponding receiving terminal number of the mission payload more than satellite link total bandwidth, the data which generates use
UDP multicast protocols carry out mission payload network data packing, are carried when the data bandwidth that a certain mission payload generates is multiplied by the task
When the corresponding receiving terminal number of lotus is not more than satellite link total bandwidth, the data which generates use TCP/IP by selection
Or the point-to-point propagation protocols of UDP carry out mission payload network data packing；
Data generate mission payload network data of the end network switch according to the adaptive conversion module output of procotol
It is divided simultaneously with whether the generation end state network data judging using the point-to-point propagation protocols of TCP/IP or UDP carries out virtual network
The status data that virtual network divides is generated, the status data that the virtual network of generation divides is added to generation end state
Network data；Data generate the end network switch by generation end state network data and mission payload network data into line number
End modem is generated according to data are sent to after exchange；
Data generate end modem and all-network data are taken out and are converted to from the data generation end network switch
Radiofrequency signal is sent into data and generates end satellite antenna, and data generate end satellite antenna and reach the communication relay satellite, by logical
Letter repeater satellite is sent to multiple data receivers；
Multiple data receivers receive the signal and process of communication relay satellite transmission by receiving terminal satellite antenna simultaneously
Receiving terminal modem is converted to network format data, is sent into the receiving terminal network switch, the receiving terminal network switch according to
The status data that virtual network divides judges whether to virtual network division, and ground surface end network receives client terminal to coming from
The data of the receiving terminal network switch carry out agreement frame head judgement, and data interpretation is carried out according to agreement frame head judging result.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (8)
1. a kind of system of the Unmanned Aerial Vehicle Data multicast communication based on satellite link, it is characterised in that：Including unmanned aerial vehicle onboard end,
Communication relay satellite with satellite relay antenna and multiple ground receivers point, unmanned aerial vehicle onboard end include all mission payloads,
Onboard networks protocol self-adapting conversion module, onboard networks interchanger, airborne modem and airborne antenna for satellite communication in motion；Each
Ground receiver point includes that ground satellite antenna, surface modem, the ground surface end network switch and ground surface end network receive visitor
Family terminal；Unmanned aerial vehicle onboard end and multiple ground receivers point are in the same LAN segment set up by satellite wireless communication channel
It is interior；Ground surface end network receives the point-to-point propagation protocols of client terminal compatibility TCP/IP, the point-to-point propagation protocols of UDP and UDP groups
Broadcast agreement；
The data that each mission payload of unmanned plane generates are sent into onboard networks protocol self-adapting conversion module；
The bandwidth for the data that onboard networks protocol self-adapting conversion module is generated according to each mission payload and corresponding ground receiver
The number of point selects procotol for the data that each mission payload generates, task load is carried out according to the procotol of selection
Lotus network data is packaged and is sent into the specified network interface of onboard networks interchanger；When the data bandwidth that a certain mission payload generates
When being multiplied by the corresponding ground receiver point number of the mission payload more than satellite link total bandwidth, the data quilt of mission payload generation
Selection carries out mission payload network data packing using UDP multicast protocols, when the data bandwidth that a certain mission payload generates is multiplied by
When the corresponding ground receiver point number of the mission payload is not more than satellite link total bandwidth, the data which generates are selected
It selects and carries out mission payload network data packing using the point-to-point propagation protocols of TCP/IP or UDP；
The mission payload network data and use that onboard networks interchanger is exported according to onboard networks protocol self-adapting conversion module
The aircraft state network data of the point-to-point propagation protocols of TCP/IP or UDP determines whether to carry out virtual network division and generate virtual
The aircraft state data that the virtual network of generation divides is added to the aircraft state net by the aircraft state data that network divides
Network data；Onboard networks interchanger is sent out after the aircraft state network data and mission payload network data are carried out data exchange
It send to airborne modem；
Radiofrequency signal is taken out and be converted to all data by airborne modem from onboard networks interchanger, is sent into airborne move
Exceedingly high line reaches the communication relay satellite by airborne antenna for satellite communication in motion；
Multiple ground receiver points receive the radiofrequency signal for coming from communication relay satellite and pass through surface modem simultaneously
It is converted to network format data and is sent into the ground surface end network switch, the shape that the ground surface end network switch is divided according to virtual network
State data judge whether to virtual network division；
Ground surface end network receives client terminal and carries out procotol frame head judgement to the data for coming from the ground surface end network switch,
Data interpretation is carried out according to agreement frame head judging result.
2. a kind of system of Unmanned Aerial Vehicle Data multicast communication based on satellite link according to claim 1, feature exist
In,
The mission payload network data and use that onboard networks interchanger is exported according to onboard networks protocol self-adapting conversion module
The aircraft state network data of the point-to-point propagation protocols of TCP/IP or UDP judge whether to exist simultaneously UDP multicast protocols data and
Point-to-point propagation protocol data, when UDP multicast protocols data and point-to-point propagation protocol data exist simultaneously, onboard networks are handed over
It changes planes and carries out virtual network VLAN divisions, the interface of wherein modem access is set as trunk mouthfuls, UDP multicast protocol numbers
According to a virtual network group is occupied, point-to-point propagation protocol data occupy another virtual network group；Two virtual network groups
Data carry out logic isolation, can not achieve communication；When UDP multicast protocols data and point-to-point propagation protocol data do not exist simultaneously
When, onboard networks interchanger is divided without virtual network.
3. a kind of system of Unmanned Aerial Vehicle Data multicast communication based on satellite link according to claim 1, feature exist
In onboard networks protocol self-adapting conversion module includes mission payload data bandwidth and receiving point number identification module and data network
The data that network protocol packing module, mission payload data bandwidth and receiving point number identification module are generated according to each mission payload
The number of bandwidth and corresponding ground receiver point selects procotol for the data that each mission payload generates；It is described each
The number of the corresponding ground receiver point of mission payload data is determined according to ground remote information；
Data network protocol packetization module opens up corresponding spatial cache according to the data volume of each mission payload, and is carried according to task
Network association is added to each mission payload data in the procotol subpackage of lotus data bandwidth and the selection of receiving point number identification module
Packet frame originating point information is discussed, the data by packing are sent into the dedicated tunnel interface of onboard networks interchanger.
4. a kind of system of Unmanned Aerial Vehicle Data multicast communication based on satellite link according to claim 1, feature exist
In the data that each mission payload of unmanned plane generates include digitized photoelectric image data, high definition picture data, digital speech number
According to radar return data.
5. a kind of system of Unmanned Aerial Vehicle Data multicast communication based on satellite link according to claim 1, feature exist
In the onboard networks interchanger and ground network interchanger are 2 layer network interchangers.
6. a kind of method of the Unmanned Aerial Vehicle Data multicast communication based on satellite link, which is characterized in that include the following steps：
(1) each mission payload generates data；
(2) number of the bandwidth and corresponding ground receiver point of the data generated according to each mission payload carries for each task
The data that lotus generates select procotol, and mission payload network data packing is carried out according to the procotol of selection；When a certain
It, should when the data bandwidth that business load generates is multiplied by the corresponding ground receiver point number of the mission payload more than satellite link total bandwidth
The data that mission payload generates carry out network data packing by selection using UDP multicast protocols, are generated when a certain mission payload
When data bandwidth is multiplied by the corresponding ground receiver point number of the mission payload no more than satellite link total bandwidth, mission payload production
Raw data carry out network data packing by selection using the point-to-point propagation protocols of TCP/IP or UDP；
(3) according to the mission payload network data of all packings and using the aircraft shape of the point-to-point propagation protocols of TCP/IP or UDP
State network data determines whether the aircraft state data for carrying out virtual network division and generating virtual network division, by the void of generation
The aircraft state data that quasi- network divides is added to the aircraft state network data；By the aircraft state network data and appoint
Load network data of being engaged in carries out data exchange；
(4) it is sent to satellite after the data after exchange being modulated demodulation, the multiple receiving points in ground are forwarded to by satellite；
(5) the multiple receiving points in ground demodulate the data of reception, are arranged according to the aircraft state data that virtual network divides
The interface of the ground surface end network switch, the data to coming from the ground surface end network switch carry out procotol frame head judgement, root
Data interpretation is carried out according to agreement frame head judging result.
7. a kind of method of Unmanned Aerial Vehicle Data multicast communication based on satellite link according to claim 6, feature exist
In the specific method is as follows for the step (3)：According to the mission payload network data of all packings and use TCP/IP or UDP points
The aircraft state network data of propagation protocol is judged whether to exist simultaneously UDP multicast protocols data and point-to-point propagation protocol
Data carry out virtual network VLAN divisions, UDP when UDP multicast protocols data and point-to-point propagation protocol data exist simultaneously
Multicast protocol data occupy a virtual network group, and point-to-point propagation protocol data occupy another virtual network group；Two void
The data of quasi- group of networks carry out logic isolation, can not achieve communication；When UDP multicast protocols data and point-to-point propagation protocol data
In the presence of when different, divided without virtual network.
8. a kind of one-to-many data transmission system based on satellite link, it is characterised in that：End is generated including a data, is carried
The communication relay satellite and multiple data receivers of satellite antenna；It includes that multiple can generate different bandwidth that the data, which generate end,
The adaptive conversion module of the mission payload of data, procotol, data generate the end network switch, data generate end modulation /demodulation
Device and data generate end satellite antenna, and each data receiver includes receiving terminal satellite antenna, receiving terminal modem, receives
The network switch, receiving terminal network is held to receive client terminal；The data that each mission payload generates have the number that is corresponding to it
Data receiver receives；Data generate end and multiple data receivers in same LAN segment；Receiving terminal network receives client
Terminal is compatible with the point-to-point propagation protocols of TCP/IP, the point-to-point propagation protocols of UDP and UDP multicast protocols；
The data bandwidth and corresponding data receiver number that the adaptive conversion module of procotol is generated according to each mission payload
Procotol is selected for the data that corresponding mission payload generates, mission payload network data is carried out according to the procotol of selection
It is packaged and is sent into the specified network interface that data generate the end network switch；When the data bandwidth that a certain mission payload generates is multiplied by
When the corresponding receiving terminal number of the mission payload is more than satellite link total bandwidth, the data which generates use UDP groups
It broadcasts agreement and carries out mission payload network data packing, corresponded to when the data bandwidth that a certain mission payload generates is multiplied by the mission payload
Receiving terminal number be not more than satellite link total bandwidth when, the mission payload generate data by selection use TCP/IP or UDP
Point-to-point propagation protocol carries out mission payload network data packing；
Data generate the end network switch according to the mission payload network data of the adaptive conversion module output of procotol and adopt
Virtual network division whether is carried out with the generation end state network data judging of the point-to-point propagation protocols of TCP/IP or UDP and is generated
The status data that the virtual network of generation divides is added to generation end state network by the status data that virtual network divides
Data；Data generate the end network switch and generation end state network data and mission payload network data are carried out data friendship
It is sent to data after changing and generates end modem；
Data generate end modem and take out all-network data from the data generation end network switch and be converted to radio frequency
Signal is sent into data and generates end satellite antenna, and data generate end satellite antenna and reach the communication relay satellite, by communication
It is sent to multiple data receivers after satellite；
Multiple data receivers are received the signal of communication relay satellite transmission by receiving terminal satellite antenna and simultaneously by receiving
End modem is converted to network format data, is sent into the receiving terminal network switch, the receiving terminal network switch is according to virtual
The status data that network divides judges whether to virtual network division, and ground surface end network receives client terminal and received to coming from
It holds the data of the network switch to carry out agreement frame head judgement, data interpretation is carried out according to agreement frame head judging result.
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