caa a22 4500 445871121 CHVBK 20180317145511.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11107-010-0287-6 doi (NATIONALLICENCE)springer-10.1007/s11107-010-0287-6 Multilayer traffic engineering for energy efficiency [Elektronische Daten] [Bart Puype, Willem Vereecken, Didier Colle, Mario Pickavet, Piet Demeester] Automatically switched multilayer IP-over-optical networks offer extensive flexibility in adapting the network to offered IP/MPLS traffic. Multilayer traffic engineering (MLTE) takes advantage of this through online IP logical topology reconfiguration in addition to the more traditional rerouting. The main goal of MLTE is to optimize toward resource usage, bandwidth throughput and QoS performance. However, energy efficiency of ICT infrastructure and the network in particular more recently have become an important aspect as well. In this article, we will look how MLTE helps in improving network energy efficiency. For this we will explain how optimization toward power requirement relates to the traditional resource usage minimization objective, and how power requirement in the network can be modeled for the MLTE algorithm. We will discuss two cases where the merit of MLTE for energy efficiency is discussed. Firstly, we will examine the interaction of MLTE with hardware-based energy efficiency optimization techniques; for this we look at scaling back power requirements through the use of better chip technology, but also decreasing idle-power requirement only, using improved chip architecture. Secondly, as MLTE allows for fast responses to changing traffic, we will see how link switch-off during off-peak hours offers a straightforward option to reduce energy needs. Springer Science+Business Media, LLC, 2010 Multilayer traffic engineering nationallicence Multilayer networks nationallicence Energy efficiency nationallicence Puype Bart Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut Vereecken Willem Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut Colle Didier Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut Pickavet Mario Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut Demeester Piet Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut Photonic Network Communications Springer US; http://www.springer-ny.com 21/2(2011-04-01), 127-140 1387-974X 21:2<127 2011 21 11107 https://doi.org/10.1007/s11107-010-0287-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11107-010-0287-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Puype Bart Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut NATIONALLICENCE 700 1- Vereecken Willem Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut NATIONALLICENCE 700 1- Colle Didier Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut NATIONALLICENCE 700 1- Pickavet Mario Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut NATIONALLICENCE 700 1- Demeester Piet Department of Information Technology, Ghent University-IBBT-IMEC, Ghent, Belgium aut NATIONALLICENCE 773 0- Photonic Network Communications Springer US; http://www.springer-ny.com 21/2(2011-04-01), 127-140 1387-974X 21:2<127 2011 21 11107 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer