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

August 09, 2017

A Cloud Native Approach to 5G Network Slicing

  • Francini A.
  • Miller R.
  • Sharma S.

5G networks will have to support a set of very diverse and often extreme requirements. Network slicing offers an effective way to unlock the full potential of 5G networks and meet those requirements on a shared network infrastructure. This paper presents a cloud native approach to network slicing. The cloud ...

August 01, 2017

Modeling and simulation of RSOA with a dual-electrode configuration

  • De Valicourt G.
  • Liu Z.
  • Violas M.
  • Wang H.
  • Wu Q.

Based on the physical model of a bulk reflective semiconductor optical amplifier (RSOA) used as a modulator in radio over fiber (RoF) links, the distributions of carrier density, signal photon density, and amplified spontaneous emission photon density are demonstrated. One of limits in the use of RSOA is the lower ...

July 12, 2017

PrivApprox: Privacy-Preserving Stream Analytics

  • Chen R.
  • Christof Fetzer
  • Le D.
  • Martin Beck
  • Pramod Bhatotia
  • Thorsten Strufe

How to preserve users' privacy while supporting high-utility analytics for low-latency stream processing? To answer this question: we describe the design, implementation and evaluation of PRIVAPPROX, a data analytics system for privacy-preserving stream processing. PRIVAPPROX provides three properties: (i) Privacy: zero-knowledge privacy (ezk) guarantees for users, a privacy bound tighter ...