Green optical networks with availability guarantee

In this paper, we study green (energy efficient) optical networks with availability guarantee. After introducing a power consumption model for green optical network design, we propose a design method called Availability-Guaranteed Energy-Efficient Design (AGEED). In AGEED, we employ dedicated path protection as backup capacity in order to improve the availability. Based on iterative routing by modifying link weight, we can make some resources be switched to sleep mode, thus obtain an energy-saving effect if there is no heavy traffic. Our simulation shows that AGEED is more advantageous to achieve energy-efficient purposes and guarantee satisfied availability levels in comparison with other methods.