Date Added: Apr 2011
According to several studies, the power consumption of the Internet accounts for up to 10% of the worldwide energy consumption and is constantly increasing. The global consciousness on this problem has also grown, and several initiatives are being put into place to reduce the power consumption of the ICT sector in general. In this paper, the authors face the problem of minimizing power consumption for Internet Service Provider (ISP) networks. In particular, they propose and assess strategies to concentrate network traffic on a minimal subset of network resources. Given a telecommunication infrastructure, their aim is to turn off network nodes and links while still guaranteeing full connectivity and maximum link utilization constraints.