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Network coding (NC) has been recently emerging as an excellent technique for leveraging network efciency. In optical networks, NC and protection appear to be a good match and indeed, NC could be efectively exploited for greater protection efciency thanks to the opportunity of combining signals rather than duplication in the traditional approach. Motivated by this observation, we investigate the application of a simple and practical NC technique based on XOR operation to improve the network throughput in survivable optical networks. To this end, we propose the NC-based protection whose speed recovery is on a par with the conventional 1 + 1 dedicated protection while the capacity usage ... |
