Abstract

We propose an orthogonal frequency division multiplexing (OFDM) based optical network design focussing on minimizing the total power consumption of the network to make the network green. OFDM is a promising technology for next-generation optical networks to support high capacity and heterogeneity in network traffic by having flexible bandwidth allocation per wavelength. Another paradigm for supporting traffic heterogeneity and high bandwidth demands is mixed-line-rate (MLR) networks where wavelengths can have discrete capacities of 10/40/100 Gbps which are single carrier based.In this study, we compare the energy efficiency of an OFDM-based network versus a MLR network. We formulate mixed integer linear program (MILP) models to design energy-efficient MLR and OFDM-based networks with two scenarios: (1) with fixed average traffic per source-destination pair of the network, and (2) with uncertainties in the traffic that an actual network may have. For scenario (2), we employ a robust optimization technique which is called Γ-robust optimization.Our results show that OFDM outperforms MLR in terms of energy efficiency especially when the traffic in the network takes random peaks in some of the links.

© 2013 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription