CN102932050B - Modular satellite system based on middle rail data relaying and method - Google Patents
Modular satellite system based on middle rail data relaying and method Download PDFInfo
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- CN102932050B CN102932050B CN201210438836.0A CN201210438836A CN102932050B CN 102932050 B CN102932050 B CN 102932050B CN 201210438836 A CN201210438836 A CN 201210438836A CN 102932050 B CN102932050 B CN 102932050B
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Abstract
The invention discloses a kind of modular satellite system based on middle rail data relaying and method, this system includes modular Satellite bunch, middle rail data relay system, earth station, modular Satellite bunch produces the data through on-board processing, and sends the data to middle rail data relay system;Data are route by middle rail data relay system, are sent to earth station in the way of transparent forwarding;Earth station is further analyzed process to the data received, and draws final result.The present invention can effectively reduce the end-to-end time delay of modular satellite system, thus realizes the real-time Data Transmission of modular satellite system.
Description
Technical field
The present invention relates to technical field of satellite communication, particularly relate in micro-satellite technical field, for modular
The system and method for satellite real-time Data Transmission.
Background technology
Micro-satellite is with micro electronmechanical integrated technique and the ASIM that is made up of several MEMSs
Based on the satellite of a kind of novel concept, its essence is a kind of distributed satellite structure system.Several grapefruit satellite conducts
The form of elementary cell constellation in a distributed manner is deployed on tracks different in space, by remote measurement, the side of remote control between them
Method interconnects, and is formed with the unified system being closely connected to complete the function that an original conventional satellite is had.
As the focus of current space technology, each state all expands actively research to micro-satellite, and modular is defended
Star system becomes the representative in micro-satellite research field with advantages such as its low cost, high investment output ratio, high flexibilities.Separate
Modularity satellite system have employed each self-forming of vitals one in the concept of modularity and combination, i.e. conventional monomer satellite
Individual single moonlet, the free flight in certain area of these satellites, use interconnected with wireless network, thus collectively constitute one
Star bunch, this star bunch possesses motility and the extensibility of height, thus has broad application prospects.
Existing modular satellite system, the support for real-time Data Transmission needs to rely on data relay satellite system
System, and for a long time, data relay satellite system all with the TDRSS Tracking and Data Relay Satellite System (TDRSS) of the U.S. as source,
I.e. using 2-3 the repeater satellite being positioned at geostationary orbit, covering is positioned at low rail in the earth in the range of certain orbit altitude
Road spacecraft.This design is minimum due to required number of satellite, and between star, transistroute agreement is the simplest, thus with its relatively low input
Obtaining and approve widely, but limited by the feature of satellite communication system, the satellite being positioned at geostationary orbit is too high because of it
Track and there is bigger time delay, the most higher track also requires that bigger launch cost, and the most this design can not be very
Support well the multiple communication services of high speed development now, especially higher to delay requirement business, how to control cost
On the premise of, improve the ability of modular satellite system real-time Data Transmission, become a problem urgently to be resolved hurrily.
Summary of the invention
The technical problem to be solved is, it is provided that a kind of modular satellite based on middle rail data relaying
System, this system can be greatly reduced system end-to-end time delay, it is achieved modular on the premise of not dramatically increasing cost
The real-time Data Transmission of satellite system.
In order to solve the problems referred to above, the present invention proposes a kind of modular satellite system based on middle rail data relaying
System, including: modular Satellite bunch, middle rail data relay system, earth station, wherein:
Modular Satellite bunch, for producing the data through on-board processing, and sends the data to middle rail number
According to relay system;
Middle rail data relay system, selects suitable path, transmission in the way of transparent forwarding for the data for sending
To earth station, this data relay system is positioned at rail track (MEO) in the earth, and orbit altitude is 10354km, than existing tracking and number
The geostationary orbit (orbit altitude 35786km) used according to relay satellite system (TDRSS) is low by more than 2/3, thus significantly
Reduce propagation delay time and satellite launch cost, additionally, be positioned at the satellite of rail track in the earth to have bigger coverage, because of
This need to increase a small amount of satellite and can complete to cover;
Earth station, for the data received are further analyzed process, draws final result.
Accompanying drawing explanation
Accompanying drawing is for providing a further understanding of the present invention, and constitutes a part for description, is served only for explaining this
Invention, is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the modular satellite system structural representation that the present invention relays based on middle rail data.
Fig. 2 is modular Satellite cluster data transmission mechanism schematic diagram in present system.
Fig. 3 is the constellation structures schematic diagram of middle rail data relay system in present system.
Fig. 4 is the flow chart of the modular satellite methods that the present invention relays based on middle rail data.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is made further
Detailed description.
The present invention is directed in existing modular satellite system, real-time Data Transmission uses and is positioned at geostationary orbit
The problem that end-to-end time delay that TDRSS Tracking and Data Relay Satellite System is brought is excessive, it is proposed that a kind of relay based on middle rail data
The implementation method of modular satellite system.
A kind of based on middle rail data relaying the modular satellite methods of the present invention, including:
Modular Satellite bunch produces the data through on-board processing, and sends the data to middle rail data relaying
System;
Middle rail data relay system is that the data sent select suitable path, is sent to ground in the way of transparent forwarding
Stand;
Earth station is further analyzed process to the data received, and draws final result.
As shown in Figure 1, it is shown that modular satellite system schematic diagram based on middle rail data relaying.This system bag
Include:
Modular Satellite bunch, for producing the data through on-board processing, and sends the data to middle rail number
According to relay system;
Middle rail data relay system, selects suitable path, transmission in the way of transparent forwarding for the data for sending
To earth station;
Earth station, for the data received are further analyzed process, draws final result.
As shown in Figure 2, it is shown that modular Satellite cluster data transmission schematic diagram.Modular Satellite bunch wraps
Include:
Payload, for having carried the imager of required by task, imager produces initial data, and data is sent
To processor;
Processor, for initial data is carried out preliminary treatment, including edge sharpening, Penetrating Fog and medium filtering, will process
After data send to memorizer;
Memorizer, is used for storing treated data, and sends data to communication module over the ground with constant speed;
Communication module over the ground, the data interaction between modular Satellite bunch and earth station, at earth station
Time in the coverage of communication module over the ground, data are conveyed directly to earth station, and otherwise, data will be transferred into middle rail data
Relay system.
The data transmission mechanism of modular Satellite bunch comprises normal and abnormal two kinds of mechanism.Under normal mechanism, number
According to sequentially passing through: payload, processor, memorizer, over the ground communication module.When the interior processor of star bunch, memorizer and over the ground
In communication module three one or more inefficacy time, corresponding steps will be skipped, i.e. if processor inefficacy, then data are successively
Pass through: payload, memorizer, over the ground communication module, if out of memory, then data sequentially pass through: payload, process
Device, over the ground communication module, if three was all lost efficacy, then data are conveyed directly to middle rail data relay system by payload.?
In normal mechanism, also include a kind of additional ways: when star bunch comprises two and more than two processors or memorizer, data
To preferentially send to the more excellent purpose processor of state and memorizer.
The implementation method of the data transmission mechanism of modular Satellite bunch is that node periodic status is safeguarded, each node
Periodically broadcast state more new data packets (State Update Packet) in star bunch, the node receiving this packet will be from
Oneself real-time status (resource utilization, idling-resource percentage ratio etc.) write packet, and it is back to source node, source node will be each
Node real-time status is saved in safeguarded a node state table, before sending data, with this node state table as reference,
Select suitable destination node.Such as, when after certain node failure, in the state table of remaining node, the state of this node will be stopped
Only updating, now according to transmission mechanism, this node will be unable to become destination node, till its state is updated again.
As shown in Figure 3, it is shown that the schematic diagram of middle rail data relay system.It is 10354km that this system is positioned at orbit altitude
The earth in rail track (MEO), use Walker-Delta constellation, 8 satellites are evenly distributed on two planar altogether, each
4 satellites of plane, its orbit inclination angle is 39.4 °.
As shown in Figure 4, it is shown that modular satellite methods flow chart based on middle rail data relaying.In conjunction with Fig. 4,
The modular satellite system relayed the present invention based on middle rail data illustrates.Specific as follows:
Step 401: the output of modular Satellite bunch is through the data of on-board processing, in normal data transfer mechanism
Under, this step includes:
Step 4011, payload produces initial data, and initial data sends to processor;
Step 4012, processor carries out edge sharpening, Penetrating Fog and medium filtering to initial data, the data transmission after process
To memorizer;
Step 4013, treated data are sent to communication module over the ground according to constant speed by memorizer;
Step 4014, communication module is according to coverage condition over the ground, selects to be conveyed directly to data ground or middle rail number
According to relay system.
Step 402: data are route by middle rail data relay system, and export to earth station, in this step, middle rail number
Include according to the routing procedure of relay system:
Step 4021, receives the repeater satellite of data, if visible with earth station, then data is conveyed directly to earth station,
Otherwise adjacent repeater satellite broadcast route request bag (Route Request Packet) in sighting distance;
Step 4022, receives the repeater satellite of routing request packet, if self is visible, then by self and earth station with earth station
Distance length feed back to source satellite, otherwise not feedback;
Step 4023, the feedback received is compared by source satellite, under the repeater satellite of chosen distance length minimum is
One hop node;
Step 4024, again rebound step 4021.
Step 403: earth station collects, analyzes and process data further, draws final result.
For the abnormal data transmission mechanism of modular Satellite bunch, can refer to Fig. 2 and above-mentioned modular is defended
Star cluster data transmission embodiment is carried out.Do not repeat them here.
The present invention is based on satellite communication correlation theory and principle, it is proposed that a kind of separation module based on middle rail data relaying
Changing satellite system and method, the method is on the premise of considering systematic function and cost, and have employed middle rail data relaying is
System is as the mode of modular Satellite bunch real-time Data Transmission, the tracking that be positioned at geostationary orbit traditional with employing
Compared with data relay system, greatly reduce system end-to-end time delay, modular satellite system has been effectively ensured to reality
Time data service support.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. done, within should be included in the scope of protection of the invention.
Claims (6)
1. a modular satellite system based on middle rail data relaying, it is characterised in that:
This system includes modular Satellite bunch, middle rail data relay system, earth station, wherein, modular satellite
Star bunch is for producing the data through on-board processing, and sends the data to middle rail data relay system, and middle rail data relay
System selects suitable path for the data for sending, and is sent to earth station in the way of transparent forwarding, and earth station is for right
The data received are further analyzed process, draw final result;
Described modular Satellite bunch specifically includes that payload, processor, memorizer, over the ground communication module;
Wherein, described middle rail data relay system includes 8 satellites being evenly distributed on two planar, and 4, each plane is defended
Star, its orbit inclination angle is 39.4 °, and described middle rail data relay system is positioned at rail rail in the earth that orbit altitude is 10354km
Road (MEO), uses Walker-Delta constellation;
Payload in described modular Satellite bunch, for having carried the imager of required by task, imager produces
Raw initial data, and send data to processor;
Processor, for carrying out preliminary treatment to initial data, including edge sharpening, Penetrating Fog and medium filtering, after processing
Data send to memorizer;
Memorizer, is used for storing treated data, and sends data to communication module over the ground with constant speed;
Communication module over the ground, the data interaction between modular Satellite bunch and earth station, when earth station be in right
Time in the coverage of ground communication module, data are conveyed directly to earth station, and otherwise, data will be transferred into middle rail data relaying
System.
A kind of modular satellite system based on middle rail data relaying, it is characterised in that:
Described earth station can be covered by the communication module over the ground in modular Satellite bunch and middle rail data relay system
Lid.
3. a modular satellite methods based on middle rail data relaying, it is characterised in that:
Modular Satellite bunch produces through the data of on-board processing, and sends the data to middle rail data relayings system
System;Middle rail data relay system is that the data sent select suitable path, is sent to earth station in the way of transparent forwarding;Ground
Station, face is further analyzed process to the data received, and draws final result;Concretely comprise the following steps:
Step 401: modular Satellite bunch produces the data through on-board processing, the data of modular Satellite bunch
Transmission mechanism includes normal and abnormal two kinds of mechanism, and under normal mechanism, this step includes:
Step 4011, payload produces initial data, and initial data sends to processor;
Step 4012, processor carries out edge sharpening, Penetrating Fog and medium filtering to initial data, and the data after process are sent to deposit
Reservoir;
Step 4013, treated data are sent to communication module over the ground according to constant speed by memorizer;
Step 4014, communication module is according to coverage condition over the ground, selects to be conveyed directly in ground or middle rail data data
Continue system;
Step 402: middle rail data relay system is that the data sent route, and exports to earth station, in this step, middle rail
The routing procedure of data relay system includes:
Step 4021, receives the repeater satellite of data, if visible with earth station, then data is conveyed directly to earth station, otherwise
Adjacent repeater satellite broadcast route request bag (Route Request Packet) in sighting distance;
Step 4022, receives the repeater satellite of routing request packet, if self is visible with earth station, then by self with earth station away from
From length feedback to source satellite, otherwise not feed back;
Step 4023, the feedback received is compared by source satellite, and the repeater satellite of chosen distance length minimum is down hop
Node;
Step 4024, again rebound step 4021;
Step 403: earth station is further analyzed process to the data received, and draws final result.
A kind of modular satellite methods based on middle rail data relaying, it is characterised in that:
In normal mechanism in the data transmission mechanism of modular Satellite bunch, also include a kind of additional ways: when star bunch
In when comprising two and more than two processors or memorizer, data will preferentially send to the more excellent purpose processor of state and deposit
Reservoir.
A kind of modular satellite methods based on middle rail data relaying, it is characterised in that:
The implementation method of the data transmission mechanism of described modular Satellite bunch is that node periodic status is safeguarded, respectively saves
Property dot cycle is broadcast state more new data packets (State Update Packet) in star bunch, and the node receiving this packet will
The real-time status write packet of oneself, and be back to source node, and each node real-time status is saved in by source node to be safeguarded
In one node state table, before sending data, with this node state table as reference, select suitable destination node;When certain saves
After point failure, in the state table of remaining node, stopping is updated by the state of this node, now according to transmission mechanism, and this node
Will be unable to become destination node, till its state is updated again;Wherein, real-time status is resource utilization, free time
Resource percentage ratio.
A kind of modular satellite methods based on middle rail data relaying, it is characterised in that:
Earth station in step 403 both can receive the data of communication module over the ground in modular Satellite bunch, it is possible to receives
The data of repeater satellite in middle rail data relay system.
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CN110516588B (en) * | 2018-12-29 | 2023-04-18 | 长沙天仪空间科技研究院有限公司 | Remote sensing satellite system |
CN110515744A (en) * | 2019-08-14 | 2019-11-29 | 北京邮电大学 | A kind of method of spacecraft software information interaction |
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