Some results on locally repairable codes with minimum distance $7$ and locality $2$

Yuan Gao; Siman Yang

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arXiv · 2207.02994

Some results on locally repairable codes with minimum distance $7$ and locality $2$

Yuan Gao·Siman Yang

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Abstract

Locally repairable codes(LRCs) play important roles in distributed storage systems(DSS). LRCs with small locality have their own advantages since fewer available symbols are needed in the recovery of erased symbols. In this paper, we prove an upper bound on the dimension of LRCs with minimum distance $d\geq 7$. An upper bound on the length of almost optimal LRCs with $d=7$, $r=2$ at $q^2+q+3$ is proved. Then based on the $t$-spread structure, we give an algorithm to construct almost optimal LRCs with $d=7$, $r=2$ and length $n\geq 3\lceil\frac{\sqrt{2}q}{3}\rceil$ when $q\geq 4$, whose dimension attains the aforementioned upper bound.

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Yuan Gao, Siman Yang. 2022-07-06. Some results on locally repairable codes with minimum distance $7$ and locality $2$. https://arxiv.org/abs/2207.02994

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