Transport-SDN application to dynamically optimize deployed optical transport networks

  • Dembeck L.
  • Ilchmann F.
  • Leven A.
  • Milbrandt J.

Evolution from todays statically operated wavelength division multiplex (WDM) networks towards future transport software defined networking (T-SDN) controlled flexible networks is in progress, enabling both an easier network set-up as well as network operation. To support this flexible approach autonomous optimization of network resources especially within deployed large WDM networks would be beneficial. Our network optimization is designed to act as an independent application on top of an SDN-controller. After the detection of non-optimized wavelengths, e.g. wavelengths meandering across the network, it performs a rerouting of wavelength channels taking into account different optimization metrics in order to reroute only one ore a few wavelength(s) per iteration. This is especially important in optical networks due to the analog behavior of optical signals within non-linear fibers which cause a strong interaction between wavelengths travelling the same link. So, only very few changes (e.g. by rerouting) can be performed to limit the annoyance of all other wavelengths along the link. We have developed and implemented a new incremental method for continuous network optimization running in the background as an application to overcome this problem.

Recent Publications

January 01, 2019

Friendly, appealing or both? Characterising user experience in sponsored search landing pages

  • Bron M.
  • Chute M.
  • Evans H.
  • Lalmas M.
  • Redi M.
  • Silvestri F.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Many of today's websites have recognised the importance of mobile friendly pages to keep users engaged and to provide a satisfying user experience. However, next to the experience provided by the sites themselves, ...

January 01, 2019

Analyzing uber's ride-sharing economy

  • Aiello L.
  • Djuric N.
  • Grbovic M.
  • Kooti F.
  • Lerman K.
  • Radosavljevic V.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist ...

January 01, 2019

The paradigm-shift of social spambots: Evidence, theories, and tools for the arms race

  • Cresci S.
  • Petrocchi M.
  • Pietro R.
  • Spognardi A.
  • Tesconi M.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Recent studies in social media spam and automation provide anecdotal argumentation of the rise of a new generation of spambots, so-called social spambots. Here, for the first time, we extensively study this novel ...