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arXiv 1705.05005cs.ITmath.IT
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具有可用性的局部可恢复码的非规则恢复和不等局部性

Irregular Recovery and Unequal Locality for Locally Recoverable Codes with Availability

Sourbh Bhadane, Andrew Thangaraj

摘要:

如果一个代码的每个坐标都可以从多个不相交的坐标集合(称为恢复集合)中恢复出来,则该代码被称为具有可用性的局部可恢复代码(LRC)。坐标的恢复集的大小的向量被称为其恢复轮廓。在这项工作中,我们考虑了两种不同设置下的可用性LRC:(1)不规则恢复:对于所有坐标保持固定的非恒定恢复曲线,(2)不平等的位置:可以随坐标变化的规则恢复曲线。对于每一个设置,我们推导出的最小距离,概括以前已知的边界的情况下,不规则或不同的恢复配置文件的界限。对于定期和固定的恢复配置文件的情况下,我们表明,一个特定的塔莫-巴格多项式的评估建设是最佳的所有符号的地方,我们提供的奇偶校验矩阵结构的信息局部性与可用性。

英文摘要:

A code is said to be a Locally Recoverable Code (LRC) with availability if every coordinate can be recovered from multiple disjoint sets of other coordinates called recovering sets. The vector of sizes of recovering sets of a coordinate is called its recovery profile. In this work, we consider LRCs with availability under two different settings: (1) irregular recovery: non-constant recovery profile that remains fixed for all coordinates, (2) unequal locality: regular recovery profile that can vary with coordinates. For each setting, we derive bounds for the minimum distance that generalize previously known bounds to the cases of irregular or varying recovery profiles. For the case of regular and fixed recovery profile, we show that a specific Tamo-Barg polynomial-evaluation construction is optimal for all-symbol locality, and we provide parity-check matrix constructions for information locality with availability.

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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