Logical Topology Design with Low Power Consumption and Reconfiguration Overhead in IP-over-WDM Networks

摘要

Reducing the power consumption of networks has drawn a lot of attention in recent years. To improve the energy efficiency, selectively turning off network components during light traffic periods could be an effective method. However, turning off/on network devices adapting to traffic load may result in the reconfiguration of logical topology in optical wavelength routed networks. In this paper, we study the logical topology design problem under multi-period traffic load in IP-over-WDM networks. To solve the problem, a mixed integer linear programming (MILP) model is proposed with the objective to minimize the overall network power consumption and the reconfiguration overhead between consecutive time periods. The proposed model is evaluated and compared with conventional schemes in terms of power consumption and reconfiguration overhead through a case study.