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Decentralized Coding Algorithms for Distributed Storage in Wireless Sensor Networks

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3 Author(s)
Zhenning Kong ; Dept. of Electr. Eng., Yale Univ., New Haven, CT, USA ; Aly, S.A. ; Soljanin, E.

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 + ¿) nodes for some small ¿ > 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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Selected Areas in Communications, IEEE Journal on  (Volume:28 ,  Issue: 2 )