Coding for Network Coding

Details Coding for Network Coding Coding for Network Coding

2007-11-26

arxiv.org/abs/0711.3935v1

Computer Science

Information Theory

12 pages, 2 ps figures

Scientific paper

We consider communication over a noisy network under randomized linear network coding. Possible error mechanism include node- or link- failures, Byzantine behavior of nodes, or an over-estimate of the network min-cut. Building on the work of Koetter and Kschischang, we introduce a probabilistic model for errors. We compute the capacity of this channel and we define an error-correction scheme based on random sparse graphs and a low-complexity decoding algorithm. By optimizing over the code degree profile, we show that this construction achieves the channel capacity in complexity which is jointly quadratic in the number of coded information bits and sublogarithmic in the error probability.

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