CN104301024B - Spaceborne multi-load data frame transfer system - Google Patents
Spaceborne multi-load data frame transfer system Download PDFInfo
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- CN104301024B CN104301024B CN201410466486.8A CN201410466486A CN104301024B CN 104301024 B CN104301024 B CN 104301024B CN 201410466486 A CN201410466486 A CN 201410466486A CN 104301024 B CN104301024 B CN 104301024B
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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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18582—Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
-
- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/1858—Arrangements for data transmission on the physical system, i.e. for data bit transmission between network components
-
- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
-
- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18586—Arrangements for data transporting, e.g. for an end to end data transport or check
Abstract
According to a kind of spaceborne multi-load data frame transfer system provided by the invention, including device：First interface module (1), for transmitting the load data of the unbalanced bit rate of multichannel to data processing module (2)；Data processing module (2), for entering formatting lines, data framing, data storage, data scrambling, data output processing to the load data received；Data cache module (3), the data for being exported to data processing module (2) are cached；Second interface module (4), read for the data to the output according to the speed of regulation.The achievable low orbit satellite Data transfer system high-speed load input of the present invention, pass under low-rate data, see on station time and star in the case of having limit admittedly, to greatest extent using channel, improve the effective utilization of satellite.
Description
Technical field
The present invention relates to satellite data frame transmission field, in particular it relates to spaceborne multi-load data frame transfer system.
Background technology
EO-1 hyperion observation satellite is to realize that high score is special " to form high spatial resolution, high time resolution, high spectral resolution
The important component of this target of the space-time cooperative of rate and High Accuracy Observation, round-the-clock, round-the-clock earth observation systems ".
6 kinds of load of the Seeds of First Post-flight, mainly possess following four feature：(1) load is more, and bit rate difference is big, wherein single load
Maximum transmission rate is 1.8Gbps, and minimum 10Mbps, rate of loading is extremely uneven, and load peaks speed adds up to
2.3Gbps；(2) mode of operation of load is more, and bit rate changes greatly between different mode；(3) working hour of load is inconsistent；
(4) operating time of load is inconsistent, while it is binary channels 900Mbps (450Mbps/ passages) that speed is passed under data transmission subsystem,
Sum biography passage is deposited admittedly in order to maximally utilize, and improves the task performance of whole star, a kind of new multi-load number is used on satellite
According to transmission design method.
Passing duration, speed down, depositing capacity admittedly, under number passes the constraint of Bandwidth-Constrained, in order to maximumlly using depositing admittedly and
Number passes passage, it is necessary to using new data frame transfer design method.This kind of spaceborne multi-load data frame transfer design method pair
After the load caching process of reception, load data is completed scheduling, multiple connection by the different of transmission rate according to load, then foundation
The AOS numbers that CCSDS AOS agreements dress up the load data encapsulating of caching standard pass frame, and AOS numbers are passed after frame scrambles and deposited
Storage, according to station situation is seen, AOS numbers biography frame is read from storage medium, delayed by 2 DBMSs in non-volatile memory medium
Deposit, AOS numbers biography frame is sent under two passages cachings respectively according to the form of whole frame according to the principle of FIFO and passed.Due to
Input load data rate is up to 2.3Gbps, lower biography speed be 900Mbps, therefore inter-process uses width bus, cached more
Design meanses, passed according to first inputting under the design philosophy that first exports ensures binary channels at full speed, the number utilized to greatest extent passes logical
Road.The transmission design method has been applied on certain satellite at present.By the transmission design method, satellite can be ensured
Load data maximumlly passes ground down, improves the effective utilization of whole star, so as to play larger effect in satellite application
Benefit.
With gradually increasing for satellite model task, rate of loading more and more higher, and frequency resource day is becoming tight, in low rail
In the design of satellite data transmission system, how to transmit the maximum amount of load data in limited seeing in the time of station turns into urgently to be resolved hurrily
Problem.The invention provides a kind of spaceborne multi-load data frame transfer design method, will provide one for the solution of above mentioned problem
Kind approach.
The content of the invention
For in the prior art the defects of, in order to solve load input rate imbalance, maximum channel efficiency of transmission asks
Topic, it is an object of the invention to propose a kind of method of spaceborne multi-load data frame transfer design, using the present invention, it can be achieved low
Rail satellite data transmission system high-speed rate load inputs, and is passed under low-rate data, sees on station time and star in the case of having limit admittedly, most
The effective utilization for utilizing channel, improving satellite of limits.
In order to reach foregoing invention purpose, the present invention is that design method is to utilize software used by solving its technical problem
The mode of realization realizes that wherein processing module completes order caching, scheduling, multiple connection, AOS framings, the data of multi-load data
Scrambling and store function；Packaged AOS frames are sent into cache module by internal bus again according to the sequencing entered to enter
Row branch is transmitted, and detailed implementation process is as follows：
According to a kind of spaceborne multi-load data frame transfer system provided by the invention, including following device：
First interface module 1, for transmitting the load data of the unbalanced bit rate of multichannel to data processing module 2；
Data processing module 2, for entering formatting lines, data framing, data storage, number to the load data received
According to scrambling, data output processing；
Data cache module 3, the data for being exported to data processing module 2 are cached；
Second interface module 4, read for the data to the output according to the speed of regulation.
Preferably, interface module 1, load data, Ran Houtong are obtained by LVDS interface or TLK2711 interfaces high-speed interface
The mode of bus is crossed by data processing module 2 of the data stream transmitting to rear end.
Preferably, data processing module 2 includes following device：
Order caching device 201, the data buffer storage of the different loads data flow for completing first interface module 1；
Multiple devices 202 are dispatched, different for the speed according to payload data stream are adjusted to each load data caching
Degree, multiple connection；
AOS framings device 203, for by the load being filled with it is data cached according to CCSDS AOS standard packagings into mark
Accurate AOS frames, frame length 1024Bytes；
Scrambling apparatus 204, carried out for data of the AOS frames to standard in addition to synchronous head according to specified pseudorandom sequence
Row are scrambled；
Storage device 205, for carrying out data storage to the AOS frames for having completed scrambling.
Preferably, data cache module 3 includes：Level cache device 301, L2 cache device 302, first passage caching
Device 303 and second channel buffer storage 304；
Level cache device 301, for reading in CCSDS AOS frame data as level cache from storage device 205
Data, level cache data are then sent to L2 cache device 302；
L2 cache device 302, the sequencing of L2 cache is input to for basis, by CCSDS AOS frames according to whole
The form alternate transport of frame is to first passage buffer storage 303 and second channel caching 304.
Preferably, the second interface module 4, the first output channel 303 and second is exported by LVDS high-speed interfaces
The data that passage 304 caches are sent to the emitter of rear end.
Compared with prior art, the present invention has following beneficial effect：
The present invention solves the problems, such as load input rate imbalance and maximum channel efficiency of transmission, can using the present invention
Realize that low orbit satellite Data transfer system high-speed load inputs, passed under low-rate data, see on station time and star have the feelings of limit admittedly
Under condition, to greatest extent using channel, the effective utilization of satellite is improved.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the theory diagram of the present invention.
Fig. 2 is the detailed design block diagram of the present invention.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Spaceborne multi-load data frame transfer system provided by the invention, including first interface module 1, data processing module 2,
Data cache module 3, second interface module 4.
First interface module 1, load data is obtained by high-speed interfaces such as LVDS interface, TLK2711 interfaces, then passed through
The mode of bus is by processing module of the data stream transmitting to rear end.
Data processing module 2 mainly by order caching device 201, scheduling multiple devices 202, AOS framings device 203, plus
Disturb device 204 and storage device 205 form, the main order caching for completing multi-load data flow, scheduling, multiple connection, AOS framings with
And number passes scrambling and the data storage of frame.Wherein order caching device 201 mainly completes the different loads of first interface module 1
The data buffer storage of data flow；Scheduling multiple devices 202 according to the speed of payload data stream difference each load data is cached into
Row scheduling, multiple connection；AOS framings device 203 by the load being filled with it is data cached according to CCSDS AOS standard packagings into standard
AOS frames, frame length 1024Bytes；Scrambling apparatus 204 is carried out according to finger to data of the AOS frames of standard in addition to synchronous head
Fixed pseudo-random sequence is scrambled；Storage device 205 carries out data storage to the AOS frames for having completed scrambling.
Cache module 3 is the core cell of multi-load data frame transfer, mainly by level cache device 301, L2 cache
Device 302, first passage buffer storage 303 and second channel buffer storage 304 form, and complete the CCSDS AOS frames of storage
Data are read into level cache device 301, and level cache data then are sent into L2 cache device 302, according to being input to two
The sequencing of level caching, CCSDS AOS numbers are passed into frame according to the form alternate transport of whole frame to first passage buffer storage 303
With second channel buffer storage 304.The wherein data that mainly caching is read from storage device 205 of level cache device 301, this is slow
It is big to deposit capacity, is 2Gbits, using SDRAM form, it is impossible to reads while write, using 80MHz clocks, 64bits bus parallels behaviour
Make, read-write speed is write the pattern read with page according to page and operated, every page of capacity is 1024*64bits up to 5.12Gbps
(8 frame AOS frames)；L2 cache device 302 is cache, is the RAM groups carried in fpga chip, and mode of operation is FIFO's
Mode, read while write, capacity 8Kbytes, using 80MHz clocks, 64bits is operated simultaneously, and read-write speed is 5.12Gbps；
The major function of first passage buffer storage 303 sends as passage high-speed channel and cached, and it is cache, is in fpga chip
The RAM groups carried, mode of operation are FIFO modes, are read while write, and capacity is 2Kbytes2 frame AOS frames, when write operation is 80MHz
Clock, 64bits are operated simultaneously, speed 5.12Gbps, and read operation is 112.5MHz clocks, and 4bits is operated simultaneously, and speed is
450Mbps；The major function of second channel buffer storage 304, composition and read-write speed and first passage buffer storage 303 1
Cause.
Second interface module 4, the data that output channel caches are sent to the transmitting of rear end by high-speed interfaces such as LVDS
Machine.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (2)
1. a kind of spaceborne multi-load data frame transfer system, it is characterised in that including following device：
First interface module (1), for transmitting the load data of the unbalanced bit rate of multichannel to data processing module (2)；
Data processing module (2), for entering formatting lines, data framing, data storage, data to the load data received
Scrambling, data output processing；
Data cache module (3), the data for being exported to data processing module (2) are cached；
Second interface module (4), read for the data to the output according to the speed of regulation；
Data processing module (2) includes following device：
Order caching device (201), the data buffer storage of the different loads data flow for completing first interface module (1)；
Dispatch multiple devices (202), for the speed according to payload data stream it is different each load data caching is scheduled,
Multiple connection；
AOS framings device (203), for by the load being filled with it is data cached according to CCSDS AOS standard packagings into standard
AOS frames, frame length 1024Bytes；
Scrambling apparatus (204), carried out for data of the AOS frames to standard in addition to synchronous head according to specified pseudo-random sequence
Scrambled；
Storage device (205), for carrying out data storage to the AOS frames for having completed scrambling；
Data cache module (3) includes：Level cache device (301), L2 cache device (302), first passage buffer storage
And second channel buffer storage (304) (303)；
Level cache device (301), for reading in CCSDS AOS frame data as level cache from storage device (205)
Data, level cache data are then sent to L2 cache device (302)；
L2 cache device (302), the sequencing of L2 cache is input to for basis, by CCSDS AOS frames according to whole frame
Form alternate transport to first passage buffer storage (303) and second channel caching (304)；
The second interface module (4), by LVDS high-speed interfaces by the first output channel (303) and the second output channel
(304) data of caching are sent to the emitter of rear end.
2. spaceborne multi-load data frame transfer system according to claim 1, it is characterised in that interface module (1), pass through
LVDS interface or TLK2711 interfaces high-speed interface obtain load data, after then data stream transmitting is given by way of bus
The data processing module (2) at end.
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| CN201410466486.8A CN104301024B (en) | 2014-09-12 | 2014-09-12 | Spaceborne multi-load data frame transfer system |
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| CN201410466486.8A CN104301024B (en) | 2014-09-12 | 2014-09-12 | Spaceborne multi-load data frame transfer system |
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| CN104301024B true CN104301024B (en) | 2018-01-12 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104750871B (en) * | 2015-04-20 | 2017-11-17 | 哈尔滨工业大学 | AOS satellite data transmission valid data area's extraction system and method based on FPGA |
| CN105245313B (en) * | 2015-10-18 | 2018-05-04 | 中国电子科技集团公司第十研究所 | Unmanned plane multi-load data dynamic multiplexing method |
| CN105450288B (en) * | 2015-11-04 | 2018-05-01 | 中国卫星海上测控部 | Multi-platform satellite uplink digital simulation verification method |
| CN108400811B (en) * | 2018-02-13 | 2019-06-25 | 北京空间技术研制试验中心 | Spacelab information system based on advanced onboard processing method |
| EP3618020A1 (en) * | 2018-08-30 | 2020-03-04 | WABCO Europe BVBA | Cable adaptor for collecting and transporting analogue signals from a plurality of sensors in a motor vehicle and corresponding method and use |
| CN110691039A (en) * | 2019-10-09 | 2020-01-14 | 上海航天电子通讯设备研究所 | Satellite-borne multichannel multi-terminal self-adaptive scheduling method and system |
| CN111130691B (en) * | 2019-11-13 | 2022-08-12 | 航天东方红卫星有限公司 | Satellite-borne asynchronous rate communication matching device |
| CN113163146B (en) * | 2021-03-26 | 2022-08-12 | 上海卫星工程研究所 | Satellite image data simulation source and interface framework construction method and system |
| CN113824649B (en) * | 2021-09-17 | 2023-10-27 | 上海航天计算机技术研究所 | Data flow control device for fixed frame length |
| CN114416447B (en) * | 2022-01-12 | 2022-12-06 | 中国科学院国家空间科学中心 | Ground test system suitable for high-speed data acquisition and transmission of effective load |
| CN116909978B (en) * | 2023-09-13 | 2024-02-02 | 苏州浪潮智能科技有限公司 | Data framing method and device, electronic equipment and storage medium |
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