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Exact-Repair MDS Code Construction Using Interference Alignment

机译:使用干扰对齐的精确修复MDS代码构造

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The high repair cost of $(n,k)$ Maximum Distance Separable (MDS) erasure codes has recently motivated a new class of MDS codes, called Repair MDS codes, that can significantly reduce repair bandwidth over conventional MDS codes. In this paper, we describe $(n,k,d)$ Exact-Repair MDS codes, which allow for any failed node to be repaired exactly with access to $d$ survivor nodes, where $kleq dleq n-1$. We construct Exact-Repair MDS codes that are optimal in repair bandwidth for the cases of: $(a)~kleq 1/2$ and $dgeq 2k-1$In this paper, we assume that all of the survivor systematic nodes participate in the repair.; $(b)~kleq 3$. Our codes are deterministic and require a finite-field size of at most $2(n-k)$. Our constructive codes are based on interference alignment techniques.
机译:$(n,k)$最大距离可分离(MDS)擦除码的高昂维修成本最近激发了一种新型MDS码,称为Repair MDS码,与传统MDS码相比,它可以大大减少维修带宽。在本文中,我们描述了$(n,k,d)$精确修复MDS代码,该代码允许通过访问$ d $幸存者节点(其中$ kleq dleq n-1 $)来精确修复任何故障节点。在以下情况下,我们构建精确修复MDS代码,其修复带宽最佳:$(a)〜k / nleq 1/2 $和$ dgeq 2k-1 $在本文中,我们假设所有幸存者系统节点参加维修。 $(b)〜kleq 3 $。我们的代码是确定性的,并且需要的最大字段大小为$ 2(n-k)$。我们的建设性代码基于干扰对齐技术。

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