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arXiv 0904.1897cs.ITmath.IT
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用于相干网络纠错的精细编码界和码构造

Refined Coding Bounds and Code Constructions for Coherent Network Error Correction

Shenghao Yang, Raymond W. Yeung, Chi-Kin Ngai

摘要:

相干网络纠错是网络编码中的差错控制问题,它利用源节点和汇聚节点的网络编码信息。相对于一组给定的本地编码内核定义的线性网络码,我们得到了改进版本的汉明界,Singleton界和Gilbert-Varshamov界的相干网络纠错。类似于它的经典对应物,这个改进的Singleton界对于线性网络码是紧的。给出了两种实现该界的线性网络码的构造算法,证明了该界的严密性。这两种算法说明了不同的设计方法:一种是利用现有的网络编码算法进行无差错传输,另一种是利用经典的纠错码。改进的Singleton边界的紧密性的含义是具有较高最大流值的汇聚节点可以具有较高的纠错能力。

英文摘要:

Coherent network error correction is the error-control problem in network coding with the knowledge of the network codes at the source and sink nodes. With respect to a given set of local encoding kernels defining a linear network code, we obtain refined versions of the Hamming bound, the Singleton bound and the Gilbert-Varshamov bound for coherent network error correction. Similar to its classical counterpart, this refined Singleton bound is tight for linear network codes. The tightness of this refined bound is shown by two construction algorithms of linear network codes achieving this bound. These two algorithms illustrate different design methods: one makes use of existing network coding algorithms for error-free transmission and the other makes use of classical error-correcting codes. The implication of the tightness of the refined Singleton bound is that the sink nodes with higher maximum flow values can have higher error correction capabilities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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