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Optical Engineering

Energy-efficient rings mechanism for greening multisegment fiber-wireless access networks
Author(s): Xiaoxue Gong; Lei Guo; Weigang Hou; Lincong Zhang
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Paper Abstract

Through integrating advantages of optical and wireless communications, the Fiber-Wireless (FiWi) has become a promising solution for the “last-mile” broadband access. In particular, greening FiWi has attained extensive attention, because the access network is a main energy contributor in the whole infrastructure. However, prior solutions of greening FiWi shut down or sleep unused/minimally used optical network units for a single segment, where we deploy only one optical linear terminal. We propose a green mechanism referred to as energy-efficient ring (EER) for multisegment FiWi access networks. We utilize an integer linear programming model and a generic algorithm to generate clusters, each having the shortest distance of fully connected segments of its own. Leveraging the backtracking method for each cluster, we then connect segments through fiber links, and the shortest distance fiber ring is constructed. Finally, we sleep low load segments and forward affected traffic to other active segments on the same fiber ring by our sleeping scheme. Experimental results show that our EER mechanism significantly reduces the energy consumption at the slightly additional cost of deploying fiber links.

Paper Details

Date Published: 1 July 2013
PDF: 12 pages
Opt. Eng. 52(7) 076107 doi: 10.1117/1.OE.52.7.076107
Published in: Optical Engineering Volume 52, Issue 7
Show Author Affiliations
Xiaoxue Gong, Northeastern Univ. (China)
Lei Guo, Northeastern Univ. (China)
Weigang Hou, Northeastern Univ. (China)
Lincong Zhang, Northeastern Univ. (China)

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