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Space file transmission method based on quick negative acknowledgement (NAK)

A negative acknowledgement and space file technology, applied in the field of space file transmission based on fast negative acknowledgement, can solve the problems of high reverse link overhead and high signaling packet error rate, achieve high throughput, low file transfer time, and improve The effect of throughput

Inactive Publication Date: 2015-12-02
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the link bit error rate is high and the link rate is asymmetrical, the CFDP protocol has problems such as a high signaling packet error rate (the signaling is not protected), a large reverse link overhead, etc., and the performance is still Room for improvement

Method used

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  • Space file transmission method based on quick negative acknowledgement (NAK)
  • Space file transmission method based on quick negative acknowledgement (NAK)
  • Space file transmission method based on quick negative acknowledgement (NAK)

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Embodiment Construction

[0019] The present invention proposes a space file transmission method based on fast negative acknowledgment, and the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] figure 1 Shown is a flow chart of a space file transmission method based on fast negative acknowledgment, including the following steps:

[0021] 1) The file sending end and the file receiving end establish a connection through request / response interaction;

[0022] 2) After the file sending end is connected with the file receiving end, the file sending end starts to transmit data packets to the file receiving end, and the transmitted data ends with an EOF (EndOfFile) command frame; after successfully completing all data packet transmissions, the file receiving end Feedback the FIN (Finished) command frame, indicating that the file transfer is successful;

[0023] 3) After the file sending end completes the data packet transmiss...

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Abstract

The invention discloses a space file transmission method based on a quick negative acknowledgement (NAK), belonging to the technical field of satellite communication. The space file transmission method comprises the following steps that: connection between a file sending end and a file receiving end is established through request / response interaction; the sending end transmits a data packet to the receiving end; transmitted data ends in an EOF (End of File) command frame; the receiving end feeds back an FIN command frame after transmission of all data packets is successfully completed; after the sending end completes transmission of the data packets, the receiving end feeds back a packet supply request NAK and starts an NAK timer if checking that some data packets are not received correctly; the NAK is quickly retransmitted if the timer still does not receive the supplied packet retransmitted by the sending end in the expiry date; and the sending end feeds back a file transmission end acknowledgement after receiving the FIN command frame. A command error-correcting mechanism, an NAK quick retransmission mechanism and an NAK frame structure compression mechanism are adopted; a space link environment can be effectively adaptive; the file transmission handling capacity and the file transmission efficiency are improved; and the space file transmission method disclosed by the invention has the advantages of being short in file transmission time and high in handling capacity.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, in particular to a space file transmission method based on fast negative response. Background technique [0002] With the rapid development of aerospace technology, the processing capabilities of spacecraft (satellites) are continuously enhanced, and various space applications supported by on-board processing technology are becoming more and more abundant. File transfer protocol is one of the basic protocols to support various space services. Due to the characteristics of long delay, high bit error rate, and link asymmetry in the space network, the widely used TCP / FTP protocol in the terrestrial Internet will cause the slow growth of the sending window when the TCP / FTP protocol is widely used in the space network, and the packet loss will be mistaken for congestion. Problems such as small sending window and a large number of confirmation return packets make the reverse link conges...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/1806
Inventor 晏坚钟贵廷刘凯韩丰陆建华
Owner TSINGHUA UNIV
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