基于CRS编码的单向文件传输系统容错性研究

Fault-tolerance of unidirectional file transmission system based on Cauchy Reed-Solomon code

为了提高单向文件传输系统的传输可靠性,该文提出使用Cauchy Reed-Solomon(CRS)纠删码对被传输文件进行冗余编码,可将冗余信息与原文件一起传输。单向文件传输系统可以实现信息在不同密级网络的单向安全传输,但不具备直接反馈信息的功能,因此在系统设计中面临着容错性问题。该文通过实验研究了单向文件传输系统的丢包现象,发现拥塞丢包发生时往往会伴随着连续的丢包,连续丢包具有周期性的规律。针对以上的规律,将纠删码应用到单向文件传输系统中。通过实验证明,采用CRS编码可以有效提高单向文件传输系统的容错性。

In order to improve the transmission reliability of the unidirectional file transmission system,a Cauchy Reed-Solomon（CRS） erasure code is used to do redundancy encoding on transmission files. This code can transmit redundancy information and original files together. Unidirectional file transmission system makes information transfer come true under different secret level networks,but it doesn＇t have the function of feedback message directly,due to this the unidirectional file transmission system against a serious problem—fault-tolerance. In this paper we make some test to research on packet loss issues,discovering that the continual packet loss obtains periodicity caused by network congestion. We make use of erasure codes on the unidirectional file transmission system owning to this conclusion. We can make a conclusion that the transmission fault-tolerance can be improved remarkably by making use of CRS code through some experiments.