Protection against link errors and failures using network coding
Abstract
We propose a network-coding based scheme to protect multiple bidirectional unicast connections against adversarial errors and failures in a network. The network consists of a set of bidirectional primary path connections that carry the uncoded traffic. The end nodes of the bidirectional connections are connected by a set of shared protection paths that provide the redundancy required for protection. Such protection strategies are employed in the domain of optical networks for recovery from failures. In this work we consider the problem of simultaneous protection against adversarial errors and failures. Suppose that n_e paths are corrupted by the omniscient adversary. Under our proposed protocol, the errors can be corrected at all the end nodes with 4n_e protection paths. More generally, if there are n_e adversarial errors and n_f failures, 4n_e + 2n_f protection paths are sufficient. The number of protection paths only depends on the number of errors and failures being protected against and is independent of the number of unicast connections.
Keywords
Cite
@article{arxiv.0905.2248,
title = {Protection against link errors and failures using network coding},
author = {Shizheng Li and Aditya Ramamoorthy},
journal= {arXiv preprint arXiv:0905.2248},
year = {2010}
}
Comments
The first version of this paper was accepted by IEEE Intl' Symp. on Info. Theo. 2009. The second version of this paper is submitted to IEEE Transactions on Communications (under minor revision). The third version of this paper has been accepted by IEEE Transactions on Communications