Efficient Distributed Storage for Space Information Network Based on Fountain Codes and Probabilistic Broadcasting

• Bo Kong,
• Gengxin Zhang,
• Wei Zhang,
• Feihong Dong,

Vol. 10, No. 6, June 29, 2016
10.3837/tiis.2016.06.009, Download Paper (Free):

• Space information network
• distributed data storage
• probabilistic broadcasting
• fountain codes
• LT codes

Abstract

This article investigates the distributed data storage problem in the space information network (SIN) using distributed fountain codes. Since space nodes in the SIN are resource-limited, in order to reduce energy consumption while improving the storage reliability, an efficient distributed storage based on fountain codes and probabilistic broadcasting (DSFPB) strategy is proposed. In the proposed strategy, source packets are disseminated among the entire network according to probabilistic broadcasting (PBcast), and the final degree distribution is close to the desired robust soliton distribution (RSD), this is benefited from the appropriate packets encoding procedure of the proposed strategy. As presented by the analysis and simulations, the total cost of data dissemination is greatly reduced compared with existing representative strategies, while improving the decoding performance.

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