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arXiv · 0904.4057

Decentralized Coding Algorithms for Distributed Storage in Wireless Sensor Networks

Zhenning Kong·Salah A. Aly·Emina Soljanin
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Abstract

We consider large-scale wireless sensor networks with $n$ nodes, out of which k are in possession, (e.g., have sensed or collected in some other way) k information packets. In the scenarios in which network nodes are vulnerable because of, for example, limited energy or a hostile environment, it is desirable to disseminate the acquired information throughout the network so that each of the n nodes stores one (possibly coded) packet so that the original k source packets can be recovered, locally and in a computationally simple way from any k(1 + ε) nodes for some small ε> 0. We develop decentralized Fountain codes based algorithms to solve this problem. Unlike all previously developed schemes, our algorithms are truly distributed, that is, nodes do not know n, k or connectivity in the network, except in their own neighborhoods, and they do not maintain any routing tables.

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Zhenning Kong, Salah A. Aly, Emina Soljanin. 2009-10-27. Decentralized Coding Algorithms for Distributed Storage in Wireless Sensor Networks. https://arxiv.org/abs/0904.4057

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