CN116471260B - Remote sensing satellite original data distribution and transmission device and method - Google Patents
Remote sensing satellite original data distribution and transmission device and method Download PDFInfo
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- CN116471260B CN116471260B CN202310729338.XA CN202310729338A CN116471260B CN 116471260 B CN116471260 B CN 116471260B CN 202310729338 A CN202310729338 A CN 202310729338A CN 116471260 B CN116471260 B CN 116471260B
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- 230000000977 initiatory effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0847—Transmission error
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention provides a remote sensing satellite original data distribution and transmission device and a remote sensing satellite original data distribution and transmission method, relates to the technical field of digital information transmission, and is used for solving the problems that the existing method cannot meet the real-time processing requirements of a plurality of data and has long waiting time, and comprises the following steps: the data distributor is used for receiving the original data according to a preset data real-time distribution format based on a preset real-time transmission protocol and converting the original data into distribution data; the distributed data comprises a data domain description frame header, data frame description information, a data frame and state information, wherein the data domain description frame header represents the size of original data, the data frame description information represents the length of the data frame and the state information, the data frame comprises the content of the original data, and the state information comprises real-time verification information, decoding information and a receiving time stamp; and the data real-time extraction transmitter is used for carrying out validity check on the distributed data by utilizing the real-time check information in the distributed data and carrying out real-time extraction and real-time transmission on the distributed data under the condition that the data frame of the distributed data is complete.
Description
Technical Field
The invention relates to the technical field of digital information transmission, in particular to the technical field of remote sensing satellite original data processing, and particularly relates to a remote sensing satellite original data distribution and transmission device and method.
Background
The distribution and transmission of the remote sensing satellite data are important links in the acquisition and processing process of the remote sensing satellite data, and in the existing remote sensing satellite baseband data acquisition and distribution system, after the data acquisition equipment acquires the remote sensing data from the baseband equipment, the data are distributed in real time on the premise of ensuring that the original data fall to the ground and the data fall to the disk is generally carried out on the premise of ensuring the local stability and reliability; or after the data is received, pushing the original data to the shared storage device, and then initiating post-transmission from the data transmission device.
Along with the increase of the remote sensing satellite data downloading code rate and the increase of load types, the existing remote sensing satellite baseband data acquisition and distribution system aims at solving the requirements of improving the real-time data processing application at a remote sensing satellite receiving station end and improving the timeliness of returning satellite data to a data center on the premise of ensuring the original data to fall to the ground.
However, in the existing remote sensing satellite baseband data acquisition and distribution system, two problems still exist: firstly, the requirement of a plurality of data real-time processing application clients on real-time original data is not met; secondly, the data post-transmission needs to be initiated after waiting for being dumped from the data acquisition equipment to the shared storage equipment, and the problem that the data waiting time is long cannot be solved.
Disclosure of Invention
The invention provides a remote sensing satellite original data distribution and transmission device and method for at least partially solving the technical problems.
Based on this, a first aspect of the present invention provides a device for distributing and transmitting original data of a remote sensing satellite, including: the data distributor is used for receiving the original data according to a preset data real-time distribution format based on a preset real-time transmission protocol and converting the original data into distribution data; the distribution data comprises a data domain description frame header, data frame description information, a data frame and state information, wherein the data domain description frame header represents the size of original data, the data frame description information represents the length of the data frame and the length of the state information, the data frame comprises the content of the original data, and the state information comprises real-time check information, decoding information and a receiving timestamp; and the data real-time extraction transmitter is used for utilizing the real-time verification information in the distributed data to carry out validity verification on the distributed data to determine the integrity of the data frame of the distributed data, and carrying out real-time extraction and real-time transmission on the distributed data under the condition that the data frame of the distributed data is complete.
According to an embodiment of the present invention, further comprising: the data collector is used for receiving the original data on the satellite and forwarding the original data to the data distributor in real time; the local storage device is used for storing the original data received by the data acquisition device; a data transmission device for temporarily storing the distribution data transmitted by the data distributor; and the data post transmitter is used for immediately initiating post transmission of the original data under the condition that the original data stored by the local storage device is consistent with the distribution data temporarily stored by the data transmission device, and immediately initiating post transmission of the original data after the original data stored by the local storage device is dumped to the shared storage device under the condition that the original data stored by the local storage device is inconsistent with the distribution data temporarily stored by the data transmission device.
According to an embodiment of the present invention, further comprising: and the real-time data checker is used for checking the integrity of each data frame of the distributed data in the process of real-time extraction and real-time transmission of the distributed data by the data real-time extraction transmitter, and storing the checking result in the real-time checking information of the distributed data.
According to an embodiment of the present invention, further comprising: and the post-verification data checker is used for post-verifying the original data received by the data acquisition unit and the distribution data converted by the data distribution unit to obtain post-verification information of the original data and post-verification information of the distribution data.
According to an embodiment of the present invention, the method for matching original data stored in a local storage device with distribution data temporarily stored in a data transmission device includes: and determining that the original data is consistent with the distributed data under the condition that the data checksum reflected by the post-verification information of the original data is equal to the data checksum reflected by the post-verification information of the distributed data.
According to an embodiment of the present invention, the size of the data frame description information is fixed to 4 bytes, and includes two fields, one of which characterizes the length of the data frame and the other of which characterizes the length of the status information.
According to the embodiment of the invention, the remote sensing satellite original data recording and exchange format is configured according to the standard based on a preset real-time transmission protocol.
According to an embodiment of the present invention, the data real-time extraction transmitter is further configured to distribute the distribution data in multiple paths in real time.
According to an embodiment of the invention, the data frame is an AOS frame.
The second aspect of the present invention provides a method for distributing and transmitting original data of a remote sensing satellite, including: receiving original data according to a preset data real-time distribution format based on a preset real-time transmission protocol, and converting the original data into distribution data; the distribution data comprises a data domain description frame header, data frame description information, a data frame and state information, wherein the data domain description frame header represents the size of original data, the data frame description information represents the length of the data frame and the length of the state information, the data frame comprises the content of the original data, and the state information comprises real-time check information, decoding information and a receiving timestamp; utilizing real-time check information in the distributed data to carry out validity check on the distributed data to determine the integrity of a data frame of the distributed data; and under the condition that the data frame of the distributed data is complete, carrying out real-time extraction and real-time transmission of the distributed data.
According to the real-time distribution and transmission device and method for the remote sensing satellite original data, provided by the embodiment of the invention, the device and method at least comprise the following beneficial effects:
after data acquisition, a data distributor is utilized, and the consumption requirement of multiple paths of real-time original data streams can be met through a unified data real-time transmission protocol and an original data real-time distribution format. The original data real-time distribution format comprises a remote sensing satellite original data transmission frame format and a corresponding data frame length, decoding information and receiving time stamp information which are acquired from a digital demodulator. Based on the real-time data distribution method, the remote sensing satellite receiving station can execute the operations of real-time extraction and transmission of the original data, real-time quality analysis of the original data, real-time quick-view processing and the like for simultaneously consuming multiple paths of real-time original data while downloading the satellite data.
The original data to be transmitted afterwards is temporarily stored in the data transmitting equipment in real time by utilizing the data distributor and the data transmitting equipment, and the data to be transmitted after the data transmitting equipment finishes the data disc dropping is compared with the data originally acquired by the data acquisition equipment, so that the transmission can be immediately initiated after the data is received, the data consistency of the transmission after the fact is ensured, and meanwhile, when the data acquisition task is intensive, the waiting time of the transmission after the original data is short.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following description of embodiments of the invention with reference to the accompanying drawings, in which:
fig. 1 schematically shows a block diagram of a remote sensing satellite original data real-time distribution and transmission device provided by an embodiment of the invention.
Fig. 2 schematically shows a block diagram of a preset data real-time distribution format provided by an embodiment of the present invention.
Fig. 3 schematically illustrates a block diagram of a remote sensing satellite original data real-time distribution transmission device according to another embodiment of the present invention.
Fig. 4 schematically shows a data post transmitter workflow provided by an embodiment of the invention.
Fig. 5 schematically shows a flowchart of a remote sensing satellite original data real-time distribution and transmission method provided by an embodiment of the invention.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed therewith; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the terms "longitudinal," "length," "circumferential," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the subsystem or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Like elements are denoted by like or similar reference numerals throughout the drawings. Conventional structures or constructions will be omitted when they may cause confusion in the understanding of the invention. And the shape, size and position relation of each component in the figure do not reflect the actual size, proportion and actual position relation. In addition, in the present invention, any reference signs placed between parentheses shall not be construed as limiting the claim.
Similarly, in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. The description of the reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature image, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular feature images, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical feature images indicated. Thus, a feature image defining "first", "second" may explicitly or implicitly include one or more of the feature images. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Fig. 1 schematically shows a block diagram of a remote sensing satellite original data real-time distribution and transmission device provided by an embodiment of the invention.
As shown in fig. 1, the remote sensing satellite original data real-time distribution and transmission device may include a data distributor and a data real-time extraction and transmission device.
The data distributor is used for receiving the original data according to a preset data real-time distribution format based on a preset real-time transmission protocol and converting the original data into distribution data; the distribution data comprises a data domain description frame header, data frame description information, a data frame and state information, wherein the data domain description frame header represents the size of original data, the data frame description information represents the length of the data frame and the length of the state information, the data frame comprises the content of the original data, and the state information comprises real-time check information, decoding information and a receiving timestamp.
In the embodiment of the invention, the data distributor is responsible for completing the real-time distribution function of the original data, and providing the original data frame, the corresponding data frame length, decoding information, receiving time stamp information and the like. The specific description is as follows:
the TCP/IP protocol network transmission can be used, and the integrity and the real-time performance of the data are ensured.
And acquiring the satellite original data stream in real time as a client.
As a server, the real-time distribution request of the original data of the rear end is monitored, and the real-time distribution of multiple paths of independent satellite original data can be simultaneously supported.
The preset data real-time distribution format is data frame description information, data frame and state information.
Fig. 2 schematically shows a block diagram of a preset data real-time distribution format provided by an embodiment of the present invention.
As shown in fig. 2, the header of the data field description frame represents the total size of the data transmission, the size of the data frame description information is fixed to 4 bytes, and the fields may be uint16_t type, and the two fields respectively indicate the length of the data frame and the length of the status information. The status information includes information such as check information, decoding information, and a reception time stamp, and the check information may be a data checksum. The data frame can be an AOS frame of original data of the remote sensing satellite.
And the data real-time extraction transmitter is used for utilizing the real-time verification information in the distributed data to carry out validity verification on the distributed data to determine the integrity of the data frame of the distributed data, and carrying out real-time extraction and real-time transmission on the distributed data under the condition that the data frame of the distributed data is complete.
In the embodiment of the invention, the data real-time extraction transmitter is used as a common original data real-time transmission function of the remote sensing satellite ground station, can use TCP/IP protocol network transmission, follows the data real-time distribution protocol defined by the invention, acquires the data code stream from the data distributor in real time, performs validity check on the data by utilizing the check information in the distribution data, and performs real-time extraction and real-time transmission of the distribution data after ensuring the integrity of the original data frame of the satellite.
Fig. 3 schematically illustrates a block diagram of a remote sensing satellite original data real-time distribution transmission device according to another embodiment of the present invention.
As shown in fig. 3, the distribution and transmission device of the original data of the remote sensing satellite may further include a data collector, a local storage device, a data sending device and a data post transmitter.
The data collector is used for receiving the original data on the satellite and forwarding the original data to the data distributor in real time.
In an embodiment of the invention, the data collector correctly and completely receives the original data on board sent by the demodulator based on the universal demodulator protocol. And completing real-time recording of the downlink original data stream of the satellite according to the standard remote sensing satellite original data recording and exchanging format and other original data formats supported by the ground station, and forwarding the received original data of the satellite to a data distributor in real time according to a real-time transmission protocol.
The local storage device is used for storing the original data received by the data collector.
In the embodiment of the invention, after the data collector collects the original data on the satellite, the original data on the satellite is sent to the data distributor on one hand, and the received original data is sent to the local storage equipment for storage on the other hand, so that thickness data sharing and matching are facilitated.
The data transmission device is used for temporarily storing the distributed data transmitted by the data distributor.
Aiming at the requirement that the original data of the satellite needs to be transmitted immediately after being received, in order to ensure that the data acquisition equipment is stable and reliable for acquiring the original data, the remote sensing satellite ground station adopts a traditional method that the original data is dumped to a shared storage without a gap of a data acquisition task, and then the data is transmitted after the transmission is started. When the data acquisition task is dense, the waiting time for the original data to be transmitted afterwards is very long because the data acquisition task is continuously carried out. Therefore, the original data to be transmitted afterwards can be temporarily stored in the data transmitting device in real time by utilizing the data distributor and the data transmitting device, and compared with the data originally acquired by the data acquisition device after the data transmitting device finishes the data disc dropping, the transmission can be immediately initiated after the data receiving is finished, and meanwhile, the data consistency of the transmission afterwards is ensured.
The data post transmitter is used for immediately initiating post transmission of the original data under the condition that the original data stored by the local storage device is consistent with the distribution data temporarily stored by the data transmission device, and immediately initiating post transmission of the original data after the original data stored by the local storage device is dumped to the shared storage device under the condition that the original data stored by the local storage device is inconsistent with the distribution data temporarily stored by the data transmission device.
Fig. 4 schematically shows a data post transmitter workflow provided by an embodiment of the invention.
As shown in fig. 4, in the embodiment of the present invention, the data post-hoc transmitter may use a TCP/IP protocol network to transmit, so as to ensure the integrity and real-time performance of the data. The data post transmitter is used as a client to acquire distribution data from the data distributor and perform formatting, real-time and verification calculation processing.
And after the data is received, if the original data checksum of the data output equipment is consistent with the original data checksum of the data acquisition equipment, immediately initiating the post-transmission of the original data. If the original data checksum of the data output device is inconsistent with the original data checksum of the data acquisition device, after the original data of the data acquisition device is dumped to the shared storage device, the post-transmission is initiated.
With continued reference to fig. 3, the remote sensing satellite original data distribution and transmission device may further include a real-time data checker and a post-hoc data checker.
The real-time data checker provides correction capability for the original data of the satellite, and is used for checking the integrity of each data frame of the distributed data in the process of real-time extraction and real-time transmission of the distributed data by the data real-time extraction transmitter, and storing the checking result in real-time checking information of the distributed data.
The post data checker provides correction capability for the original data of the satellite, and ensures the integrity of the original data in the distribution and transmission processes. After the original data is dropped, the post-data checker is used for post-checking the original data received by the data collector and the distributed data converted by the data distributor, so as to obtain post-checking information of the original data and post-checking information of the distributed data, and the post-data processing application module can verify the consistency with the satellite original data recorded by the data collecting equipment when using the distributed original data.
Fig. 5 schematically shows a flowchart of a remote sensing satellite original data real-time distribution and transmission method provided by an embodiment of the invention.
As shown in fig. 5, the method may include, for example, operations S501 to S503.
In operation S501, original data is received according to a preset data real-time distribution format based on a preset real-time transmission protocol, and the original data is converted into distribution data.
In operation S502, validity check is performed on the distribution data using the real-time check information in the distribution data to determine the integrity of the data frame of the distribution data.
In operation S503, in the case where the data frame of the distribution data is complete, real-time extraction and real-time transmission of the distribution data are performed.
It should be understood that the implementation details and the technical effects of the method embodiment part are the same or similar to those of the device embodiment part, and are not described in detail.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (7)
1. A remote sensing satellite original data distribution and transmission device, which is characterized by comprising:
the data distributor is used for receiving the original data according to a preset data real-time distribution format based on a preset real-time transmission protocol and converting the original data into distribution data; the distribution data comprises a data field description frame header, data frame description information, a data frame and state information, wherein the data field description frame header represents the size of the original data, the data frame description information represents the length of the data frame and the length of the state information, the data frame comprises the content of the original data, and the state information comprises real-time check information, decoding information and a receiving timestamp;
the data real-time extraction transmitter is used for carrying out validity check on the distributed data by utilizing the real-time check information in the distributed data to determine the integrity of the data frame of the distributed data, and carrying out real-time extraction and real-time transmission of the distributed data under the condition that the data frame of the distributed data is complete;
the data collector is used for receiving the original data on the satellite and forwarding the original data to the data distributor in real time;
the local storage device is used for storing the original data received by the data acquisition device;
a data transmission device for temporarily storing the distribution data transmitted by the data distributor;
a data post-transmitter, configured to immediately initiate post-transmission of the original data when the original data stored in the local storage device is consistent with the distribution data temporarily stored in the data transmission device, and immediately initiate post-transmission of the original data after dumping the original data stored in the local storage device to the shared storage device when the original data stored in the local storage device is inconsistent with the distribution data temporarily stored in the data transmission device;
the data frames are AOS frames, wherein the real-time transmission protocol based on the preset is configured according to the standard of the original data recording and exchange format of the remote sensing satellite.
2. The apparatus for distributing and transmitting original data of remote sensing satellite according to claim 1, further comprising:
and the real-time data checker is used for checking the integrity of each data frame of the distributed data in the process of real-time extraction and real-time transmission of the distributed data by the data real-time extraction transmitter, and storing the checking result in the real-time checking information of the distributed data.
3. The apparatus for distributing and transmitting original data of remote sensing satellite according to claim 1, further comprising:
and the post-verification data checker is used for post-verifying the original data received by the data acquisition unit and the distribution data converted by the data distribution unit to obtain post-verification information of the original data and post-verification information of the distribution data.
4. The apparatus for distributing and transmitting original data of remote sensing satellite according to claim 3, wherein the original data stored in the local storage device is consistent with the distributed data temporarily stored in the data transmission device, comprising:
and determining that the original data is consistent with the distributed data under the condition that the data checksum reflected by the post-verification information of the original data is equal to the data checksum reflected by the post-verification information of the distributed data.
5. The apparatus according to claim 1, wherein the data frame description information is fixed to 4 bytes in size, and includes two fields, one field representing the length of the data frame and the other field representing the length of the status information.
6. The apparatus of claim 1, wherein the real-time data extraction transmitter is further configured to distribute the distributed data in multiple real-time ways.
7. A distribution transmission method based on the distribution transmission device of the remote sensing satellite original data according to any one of claims 1 to 6, characterized by comprising:
based on a preset real-time transmission protocol, receiving original data according to a preset data real-time distribution format, storing the original data, converting the original data into distribution data, and temporarily storing the distribution data; the distribution data comprises a data field description frame header, data frame description information, a data frame and state information, wherein the data field description frame header represents the size of the original data, the data frame description information represents the length of the data frame and the length of the state information, the data frame comprises the content of the original data, and the state information comprises real-time check information, decoding information and a receiving timestamp;
utilizing real-time verification information in the distributed data to carry out validity verification on the distributed data to determine the integrity of a data frame of the distributed data;
under the condition that the data frame of the distributed data is complete, carrying out real-time extraction and real-time transmission of the distributed data;
under the condition that the stored original data is consistent with the temporarily stored distributed data, immediately initiating the post-transmission of the original data;
under the condition that the stored original data is inconsistent with the temporarily stored distributed data, immediately initiating post transmission of the original data after the stored original data is dumped to the shared storage equipment;
the data frames are AOS frames, wherein the real-time transmission protocol based on the preset is configured according to the standard of the original data recording and exchange format of the remote sensing satellite.
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