Multilayer traffic engineering for energy efficiency
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.
KeywordsMultilayer traffic engineering Multilayer networks Energy efficiency
Unable to display preview. Download preview PDF.
- 1.Berger, L., et al.: RFC 3471, generalized multi-protocol label switching (GMPLS) signaling functional description. Network Working Group (2003)Google Scholar
- 3.Puype, B., Yan, Q., De Maesschalck, S., Colle, D., Pickavet, M., Demeester, P.: Optical cost metrics in multi-layer traffic engineering for IP-over-optical networks. In: Proceedings of the 6th International Conference on Transparent Optical Networks (ICTON’04), Wroclaw, Poland, vol. 1, 2004, pp. 75–80. doi: 10.1109/ICTON.2004.1360248
- 4.Pickavet, M., Vereecken, W., Demeyer, S., Audenaert, P., Vermeulen, B., Develder, C., Colle, D., Dhoedt, B., Demeester, P.: Worldwide energy needs for ICT: The rise of power-aware networking. In: Proceedings of the 2nd International Symposium on Advanced Networks and Telecommunication Systems (ANTS’08), Mumbai, December 2008. doi: 10.1109/ANTS.2008.4937762
- 5.Baliga, J., Hinton, K., Tucker, R.S.: Energy Consumption of the Internet. In: Proceedings of the Joint International Conference on Optical Internet and 32nd Australian Conference on Optical Fibre Technology (COIN-ACOFT 2007), Melbourne, Australia, June 2007. doi: 10.1109/COINACOFT.2007.4519173
- 7.Chabarek, J., Sommers, J., Barford, P., Estan, C., Tsiang, D., Wright, S.: Power awareness in network design and routing. In: Proceedings of the 27th Conference on Computer Communications (IEEE INFOCOM 2008), Phoenix, Arizona, April 2008, pp. 457–465. doi: 10.1109/INFOCOM.2008.93
- 9.Chiaraviglio, L., Mellia, M., Neri, F.: Reducing power consumption in backbone networks. In: Proceedings of the IEEE International Conference on Communications (ICC 2009), Dresden, Germany, June 2009Google Scholar
- 10.Xia, M., Tornatore, M., Zhang, Y., Crowdhury, P., Martel, C., Mukherjee, B.: Greening the optical backbone networks: a traffic engineering approach. In: Proceedings of the IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 2010. doi: 10.1109/ICC.2010.5502228
- 12.Nordman, B., Christensen, K.: Reducing the energy consumption of networked devices. IEEE 802.3 tutorial, 2005. http://www.ieee802.org/802_tutorials/05-July/Tutorial%20July%20Nordman.pdf, accessed 12 Dec 2009
- 13.Cho, K., Fukuda, K., Esaki, H., Kato, A.: Observing slow crustal movement in residential user traffic. In: Proceedings of the 4th Annual ACM International Conference On Emerging Networking Experiments And Technologies (ACM CoNEXT 2008), Madrid, Spain, December 2008. doi: 10.1145/1544012.1544024
- 14.IST 5th Framework COST 266 reference topologies. http://www.ibcn.intec.ugent.be/INTERNAL/NRS/index.html
- 15.Puype, B. Yan, Q. Colle, D. De Maesschalck, S., Lievens, I., Pickavet, M. Demeester, P.: Multi-layer traffic engineering in data-centric optical networks. In: Proceedings of the COST266/IST OPTIMIST workshop—ONDM 2003, Budapest, Hungary, February 2003, pp. 211–226Google Scholar
- 16.Afanasyev, M., Chen, T., Voelker, G.M., Snoeren, A.C.: Analysis of a mixed-use urban wifi network: when metropolitan becomes Neapolitan. In: Proceedings of the 8th ACM SIGCOMM Conference on Internet Measurement (IMC’08), Vouliagmeni, Greece, October 2008, pp. 85–98. doi: 10.1145/1452520.1452531