Title: Energy Efficient Virtual Topology Configuration Algorithm for IP Over WDM Optical Networks

Year of Publication: Dec - 2014
Page Numbers: 206-213
Authors: Georgia Beletsioti, Georgios Papadimitriou, Petros Nicopolitidis, Emmanouel Varvarigos
Conference Name: The International Conference on Computer Science, Computer Engineering, and Social Media (CSCESM2014)
- Greece


Until recently the main limitation to the development of networks was the cost of equipment and transmission. Today the main problem is the increasing energy consumption. A number of studies estimate the energy consumption of ICT in a range of 2%-10% of global power usage with telecommunication networks occupying a large part of this proportion. For this reason, in recent years considerable efforts are made in order to create energy efficient networks architectures. In this context, this paper focuses on reducing the energy consumption of an IP Over WDM backbone network using lightpath bypass and traffic grooming capabilities. Although previously proposed schemes based on lightpath bypass and grooming strategies can reduce the overall energy consumption on a network they do not take into account the minimization of the number of the lightpaths that should be established in the virtual topology. To overcome the above mentioned drawback a novel power-aware heuristic, called Online Virtual Topology Configuration (OVTC), which will focus on energy efficiency issues related to the operation phase of a WDM optical network is proposed. This model which is mainly based on lightpath bypass and grooming capabilities, reduces the number of lightpaths that should be established in the virtual topology, disabling and reusing lightpaths which data could be routed via alternative pre-established lightpaths and thus reduces the overall power consumption. Simulation results indicate that the proposed architecture manages to achieve a percentage of power saving by up to 6%, compared to similar proposed techniques for energy-saving.