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High real-time spacecraft data transmission method based on priorities

A data transmission method and priority technology, applied in digital transmission systems, transmission systems, data exchange networks, etc., can solve the problems of poor real-time performance and low reliability of spacecraft data communication, and achieve high reliability, high real-time performance, The effect of ensuring reliability

Inactive Publication Date: 2013-11-27
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a priority-based high real-time spacecraft data transmission method, and solve the problem of poor real-time performance and low reliability of using TCP / IP protocol for spacecraft data communication. The problem

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Embodiment Construction

[0021] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0022] Such as figure 2 As shown, the present invention provides a priority-based high real-time spacecraft data transmission method, which occurs in the network transport layer, and the network transport layer refers to the transport layer in the OSI network seven-layer model. The data packet transmission method based on priority preemption is adopted, and the priority of data packets is set during the transmission process. Data packets with high priority are transmitted before those with low priority, which improves the real-time performance of data transmission; and adopts multi-level data verification And timeout retransmission mechanism to improve the reliability of data transmission. The steps are as follows:

[0023] (1) Divide the data specified to be sent into several data packets, and assign serial numbers to the data packets according to the sequence of ...

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Abstract

The invention discloses a high real-time spacecraft data transmission method based on priorities. The method comprises the first step of partitioning data assigned to be sent into a plurality of data packages and continuously allocating serial numbers to the data packages according to the successive sequence of data organization, the second step of setting the priorities for all data packages and sending the data packages according to the sequence from a high priority to a low priority of the data packages, the third step of verifying the integrity and correctness of one data package after a receiver receives the data package, and sending a confirmed data package comprising the serial number of a next data package needing to be received to a sender, the fourth step of sending the next data package after the sender receives the confirmed data package, if the confirmed data package is not received by the sender in the assigned time, the confirmed data package is sent again, and the fifth step of combining all received data packages into integrated data via the receiver according to the successive sequence of the serial numbers after all data packages are sent to the receiver. The high real-time spacecraft data transmission method has the advantages of being high in real-time performance and reliability.

Description

technical field [0001] The invention relates to a spacecraft data transmission method, which belongs to the field of spacecraft data transmission. Background technique [0002] As the functions of spacecraft become more and more complex, data communication and collaborative work within the spacecraft or between spacecraft have become a development trend of spacecraft. At present, the data transmission of the spacecraft network mostly adopts the TCP / IP protocol, but the TCP / IP protocol has the defects of poor real-time performance, low reliability and complex design. [0003] The data transmitted by the spacecraft for data communication and collaborative work is mainly divided into control data and transaction data. Control data has high requirements for real-time data transmission, but the data volume is generally small; transaction data has low requirements for real-time data transmission, but high requirements for data transmission speed and throughput. The general TCP / I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/865H04L47/6275
Inventor 徐建乔磊龚健杨桦杨孟飞
Owner BEIJING INST OF CONTROL ENG
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