Data storage structure and remote sensing satellite data storage system
A technology for data storage and remote sensing satellites, applied in the field of aerospace remote sensing data storage, can solve the problems of TCP/IP protocol not supporting hardware error correction and retransmission, complex TCP/IP protocol architecture, processor overhead, etc., to achieve real-time recording and access processing, meeting the needs of real-time processing and logging
Inactive Publication Date: 2016-11-16
北京悦图数据科技发展有限公司
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Problems solved by technology
[0003] 1) Due to the complexity of the TCP / IP protocol architecture (including physical layer, link layer, network layer, transport layer, session layer, presentation layer, and application layer), there will be uncertain delays in data transmission using this protocol; in addition , the application layer in the protocol architecture requires software support (such as the transmission control protocol TCP), which will cause a certain overhead to the processor; the TCP / IP protocol does not support hardware error correction and retransmission;
[0004] 2) Since the existing solution is to store the received data in the memory of the operating system, and the memory is based on the virtual address of the actual physical medium, the mapping management relationship between the virtual address and the physical address needs to be maintained and managed by the operating system, so when the memory After the use reaches a certain size, it will cause a certain overhead on the processor; in addition, because the operating system adopted by the server is a non-real-time operating system, there is a layered relationship between the user layer and the kernel layer, so storing the received data on the physical medium requires The participation of the processor will cause certain calculation overhead and storage delay
Method used
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[0040] Two discrete memory modules are developed in the upper computer, which are used to store data modules and address modules respectively. N in the data module 2A size of 4KB, unrelated discrete addresses, but continuous within 4KB. The address module has n / 512 unrelated discrete addresses with a size of 2056byte (64-bit address, 257*8byte), but it should be noted that the addresses within 2056byte are continuous. Each address module stores 257 address units, of which the first 256 units are the first physical address of each 4KB storage data module, the 257th is the first physical address of the next address module, and the 257th storage unit of the n / 512th address is The first physical address of the first address module. This forms an address linked list.
[0041] The FPGA (Field-Programmable Gate Array, field-programmable gate array) program reads 257 addresses (that is, the size of each address module) each time according to the first physical address in the issued...
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The invention relates to a data storage structure and a remote sensing satellite data storage system. The data storage structure comprises an address module and a data module, wherein the data module comprises N2 data sub-modules; the address module comprises N1 address sub-modules, each address sub-module comprising M1 address units, wherein an initial physical address of each data sub-module is stored in the address unit of the first (M1-1) address units, and the initial physical address of the next data sub-module is stored in the M1 address unit; the data storage system comprises a data receiving unit, a data uploading unit and a user interface unit; by using the data storage structure and the data storage system, real-time recording and access processing of massive remote sensing satellite data can be achieved, and timeliness of data processing and recording of a ground system is greatly improved.
Description
technical field [0001] The invention relates to the field of aerospace remote sensing data storage, in particular to a remote sensing data storage structure and data storage system, in particular to a data storage structure and data storage system for realizing high-speed mass memory access of remote sensing satellites. Background technique [0002] The existing remote sensing satellite data storage system uses the TCP / IP (Transmission Control Protocol / Internet Protocol) protocol for data transmission, and stores the received data in the memory of the operating system, and then This data undergoes backend processing. This solution has defects such as long processing delay and poor real-time performance, as follows: [0003] 1) Due to the complexity of the TCP / IP protocol architecture (including physical layer, link layer, network layer, transport layer, session layer, presentation layer, and application layer), there will be uncertain delays in data transmission using this ...
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Login to View More IPC IPC(8): G06F12/10G06F13/16
CPCG06F12/109G06F13/1668
Inventor 类成普
Owner 北京悦图数据科技发展有限公司