Explicit Constructions of Optimal-Access MSCR Codes for All Parameters

doi:10.1109/LCOMM.2020.2972899

CSpace

	Explicit Constructions of Optimal-Access MSCR Codes for All Parameters
	Zhang, Yaqian 1,2; Zhang, Zhifang 1,2; Wang, Lu 1,2
	2020-05-01
发表期刊	IEEE COMMUNICATIONS LETTERS
ISSN	1089-7798
卷号	24 期号:5 页码:941-945
摘要	The MSCR (minimum storage cooperative regenerating) code is an important variation of regenerating codes for repairing multiple node failures in a cooperative way and retaining the minimum storage. However, explicit constructions of MSCR codes for all parameters were not developed untill Ye&Barg's recent work. Here we present another explicit construction of MSCR codes for all parameters. Specifically, we design an (n, k) MDS code that can cooperatively repair any h (2 <= h n - k) erasures from any d (k <= d <= n - h) helper nodes. The superiority of our code to Ye&Barg's is three fold: (1) Our code additionally has the optimal access property, i.e., the amount of data accessed at each helper node meets a lower bound on this quantity; (2) The subpacketization level is reduced by a factor of (d - k)((h-1)) [GRAPHICS] ; (3) Our code is built over a smaller field F with vertical bar F vertical bar >= n+ d - k, compared to Ye&Barg's requirement vertical bar F vertical bar vertical bar (d - k + 1)n.
关键词	Cooperative regenerating code optimal access distributed storage system
DOI	10.1109/LCOMM.2020.2972899
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[61872353]
WOS研究方向	Telecommunications
WOS类目	Telecommunications
WOS记录号	WOS:000536637200002
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/51477
专题	中国科学院数学与系统科学研究院
通讯作者	Zhang, Yaqian
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, Key Lab Math Mechanizat, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yaqian,Zhang, Zhifang,Wang, Lu. Explicit Constructions of Optimal-Access MSCR Codes for All Parameters[J]. IEEE COMMUNICATIONS LETTERS,2020,24(5):941-945.
APA	Zhang, Yaqian,Zhang, Zhifang,&Wang, Lu.(2020).Explicit Constructions of Optimal-Access MSCR Codes for All Parameters.IEEE COMMUNICATIONS LETTERS,24(5),941-945.
MLA	Zhang, Yaqian,et al."Explicit Constructions of Optimal-Access MSCR Codes for All Parameters".IEEE COMMUNICATIONS LETTERS 24.5(2020):941-945.