Software Defined Flexible Optical Access Networks Enabling Throughput Optimization and OFDM-Based Dynamic Service Provisioning for Future Mobile Backhaul


IEICE TRANSACTIONS on Communications   Vol.E97-B   No.7   pp.1244-1251
Publication Date: 2014/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.1244
Type of Manuscript: INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
software defined network (SDN),  mobile backhaul (MBH),  passive optical network (PON),  orthogonal frequency division multiple access (OFDMA),  Nyquist filtering,  

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In this invited paper, software defined network (SDN)-based approaches for future cost-effective optical mobile backhaul (MBH) networks are discussed, focusing on key principles, throughput optimization and dynamic service provisioning as its use cases. We propose a novel physical-layer aware throughput optimization algorithm that confirms > 100Mb/s end-to-end per-cell throughputs with ≥2.5Gb/s optical links deployed at legacy cell sites. We also demonstrate the first optical line terminal (OLT)-side optical Nyquist filtering of legacy 10G on-off-keying (OOK) signals, enabling dynamic >10Gb/s Orthogonal Frequency Domain Multiple Access (OFDMA) λ-overlays for MBH over passive optical network (PON) with 40-km transmission distances and 1:128 splitting ratios, without any ONU-side equipment upgrades. The software defined flexible optical access network architecture described in this paper is thus highly promising for future MBH networks.