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arXiv 0903.1967cs.ITmath.IT
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使用卷积码的单位延迟无记忆网络的网络纠错

Network error correction for unit-delay, memory-free networks using convolutional codes

K. Prasad, B. Sundar Rajan

摘要:

如果所有的内部节点(除了源节点和宿节点)都不使用内存,而只是在它们的输出边缘上发送在它们的输入边缘处接收到的符号的线性组合,则单源网络被称为无内存网络。在这项工作中,我们介绍了网络纠错单源,非循环,单位延迟,无记忆网络相干网络编码组播。卷积码在源处基于网络码设计,以便校正对应于给定错误模式集合中的任何错误模式的网络错误,只要连续错误由取决于所选择的卷积码的特定间隔分开即可。在这个区间上的界限和所需的自由距离的卷积码构造所需的字段大小也得到。我们说明了性能的卷积网络纠错码(CNECCs)设计的单位延迟网络使用模拟CNECCs的一个例子网络下的概率错误模型。

英文摘要:

A single source network is said to be memory-free if all of the internal nodes (those except the source and the sinks) do not employ memory but merely send linear combinations of the symbols received at their incoming edges on their outgoing edges. In this work, we introduce network-error correction for single source, acyclic, unit-delay, memory-free networks with coherent network coding for multicast. A convolutional code is designed at the source based on the network code in order to correct network-errors that correspond to any of a given set of error patterns, as long as consecutive errors are separated by a certain interval which depends on the convolutional code selected. Bounds on this interval and the field size required for constructing the convolutional code with the required free distance are also obtained. We illustrate the performance of convolutional network error correcting codes (CNECCs) designed for the unit-delay networks using simulations of CNECCs on an example network under a probabilistic error model.

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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