In this paper, we will propose TeLQAS, which is an ontology-based natural language question/answering system for the domain of Telecommunication Technologies. In an online process, the system accepts the users’ questions in English, and after retrieving the related text documents from either its local database or web; it summarizes the retrieved text documents with the highest relevance. The pr...

The performance of dataand telecommunication equipment must keep up with the increasing network speed. At the same time, one must deal with the internal interconnection complexity, often growing exponentially with the number of ports. Therefore, new interconnection technologies to be used internally in the equipment are needed. Optical interconnection technology is a promising alternative and m...

This paper presents an architecture for an all optical switching node. The architecture is suitable for optical packet and optical burst switching and provides appropriate contention resolution schemes and QoS guarantees. A concept, called virtual memory, is developed to allow controllable and reasonable periods for delaying optical traffics. Related to its implementation, several engineering i...

Telecommunication traffic (voice, data etc.) is increasing day by day. So to meet the capacity demand, in this paper we have designed and verified a high capacity optical fiber communication system through simulation. We simulated a 40 Gbps single optical fiber link for telecommunication traffic transmission which could be possible to implement in developing countries with few modifications in ...

Optical packet switching has received considerable attention over the last few years. In this paper we discus how optical signal processing can play a role in photonic packet routing. Two examples are given. Firstly we discuss ultrafast wavelength switching at 160 Gbit/s in a single semiconductor optical amplifier. Secondly, an integrated photonic flip-flop is discussed. Finally a discussion is...

Acknowledgements The research presented in this thesis is motivated by a joint project of T-Systems Nova GmbH Technologiezentrum and the Konrad-Zuse-Zentrum für Informationstechnik Berlin, financed by Deutsches Forschungsnetz e.V. Working on this project was very instructive for me. The cooperation with Jörg Rambau, Diana Poensgen and Sven O. Krumke was very pleasant. I wish to thank them for t...

We establish the concept of the density of the optical degrees of freedom that may be applied to any photonics based system. As a key example of this versatile approach we explore information transfer using optical communication. We demonstrate both experimentally, theoretically and numerically that the use of a basis set with fields containing optical vortices does not increase the telecommuni...