Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (11): 2685-2697.doi: 10.13229/j.cnki.jdxbgxb20210839

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Distributed coding scheme for blockchain system based on regeneration codes

He-ling XIAO1(),Wang-mei GUO2,Jing WANG3   

  1. 1.School of Electronic & Control Engineering，Chang'an University，Xi'an 710064，China
    2.State Key Laboratory of Integrated Service Networks，Xidian University，Xi'an 710071，China
    3.School of Information Engineering，Chang'an University，Xi'an 710064，China
  • Received:2021-08-28 Online:2022-11-01 Published:2022-11-16

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Abstract:

A novel way of distributed coding schemes to reduce blockchain nodes' memory requirements and network load using (n,k,d) exact-regeneration MSR （ER-MSR） codes is presented. Our scheme has the same protocol for mining， broadcasting， and verification of blocks as Bitcoin-type blockchains. As for the difference， the full nodes encode data across multiple blocks and do not have to store all blocks. Specially， a group of k blocks only need to store one block. To exactly read a block data that is not stored locally， it can be realized by connecting to d helper nodes and downloading a small amount of data. While maintaining the integrity and availability of block， this scheme leads to a significant reduction in storage and recovery communication costs， and the scalability of the system is enhanced. It is proved that this system has enlarged overall storage capability and reduced the cost of network bandwidth when more nodes attend the blockchain.

Key words: blockchain, distributed storage, regeneration codes, storage scalability

CLC Number: 

  • TP302

Fig.1

Illustration of the block structure"

Fig.2

Illustration of comprising a group of blocks"

Table 1

Important symbols used in this article"

符号说 明符号说 明
B(i)第i个区块α数据符号长度
k区块分组长度A(m)区块数据矩阵
aij数据元素v?i编码码字
T区块大小V(m)区块编码矩阵
a?ij数据符号d帮助节点个数

Fig.3

Lustration of repairing of failed node two"

Fig.4

Decoding complexity with different blockchain systems"

Fig.5

Average storage overhead per block with different blockchain systems"

Fig.6

Storage capability with different blockchain systems"

Fig.7

Recovery communication cost with different blockchain systems"

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