@article{BetkerKosiankowskiLangeetal.2014, author = {Betker, Andreas and Kosiankowski, Dirk and Lange, Christoph and Pfeuffer, Frank and Raack, Christian and Werner, Axel}, title = {Energy efficiency in extensive IP-over-WDM networks with protection}, series = {Operations Research Proceedings 2012}, journal = {Operations Research Proceedings 2012}, editor = {Helber, Stefan and Breitner, Michael and R{\"o}sch, Daniel and Sch{\"o}n, Cornelia and Graf von der Schulenburg, Johann-Matthias and Sibbertsen, Philipp and Steinbach, Marc and Weber, Stefan and Wolter, Anja}, publisher = {Springer}, doi = {10.1007/978-3-319-00795-3_14}, pages = {93 -- 99}, year = {2014}, language = {en} } @article{BetkerGamrathKosiankowskietal., author = {Betker, Andreas and Gamrath, Inken and Kosiankowski, Dirk and Lange, Christoph and Lehmann, Heiko and Pfeuffer, Frank and Simon, Felix and Werner, Axel}, title = {Comprehensive Topology and Traffic Model of a Nationwide Telecommunication Network}, series = {Journal of Optical Communications and Networking}, volume = {6}, journal = {Journal of Optical Communications and Networking}, number = {11}, doi = {10.1364/JOCN.6.001038}, pages = {1038 -- 1047}, abstract = {As a basis for meaningful simulation and optimization efforts with regard to traffic engineering or energy consumption in telecommunication networks, suitable models are indispensable. This concerns not only realistic network topologies but also models for the geographical distribution and the temporal dynamics of traffic, as well as the assumptions on network components and technology. This paper derives such a model from the practice of a large national carrier. Applying the network and traffic model, we demonstrate its use by presenting various optimization cases related to energy-efficient telecommunication. Here, we focus on load adaptivity by employing sleep modes to the network hardware, where several constraints on the reconfigurability of the network over time are considered.}, language = {en} }