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Efficient Bandwidth Allocation in the NEPHELE Optical/Electrical Datacenter Interconnect

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Abstract

The NEPHELE data center interconnection network relies on hybrid electro-optical top-of-rack switches to interconnect servers over multi-wavelength optical rings. The bandwidth of the rings is shared, and an efficient utilization of the infrastructure calls for co-ordination in the time, space, and wavelength domains. To this end, we present offline and incremental dynamic resource assignment algorithms. The algorithms are suitable for implementation in a software defined network control plane, achieving efficient, collision-free, and on demand capacity use. Our simulation results indicate that the proposed algorithms can achieve high utilization and low latency in a variety of traffic scenarios that include hot spots and/or rapidly changing traffic.

© 2017 Optical Society of America

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