Optical switching systems with MOOQ switching
Duration
20.11.2007 - 19.05.2009Financing entity
Ministry of Science and Higher EducationSummary
The project was implemented within action COST 291 “Towards Digital Optical Networks”, the main objective of which is to analyse the concept of node and network architectures using optical technologies, in order to implement them in future communication networks. The action was carried out in the years 2004-2008, and our team of project participants joined the action works in 2007. The project was implemented from June 2007 until December 2008.The main goal of the project was the development and examination of the architecture of a fully optical switch with multiple optical buffers located at the output – MOOQ (Multiple Optical Output Queuing). Two solutions were proposed, allowing for the implementation of output buffers. The solutions employed QD-SOA semi-conductor optical amplifiers (Quantum Dot – Semiconductor Optical Amplifier) and fixed-length delay lines. The above elements can also ensure both output buffering, and parallel optical buffers. The developed architectures are characterised by low packet delays and enable the maximum use of available buffers. The optical buffer solutions were based on the modified architecture proposed by a team from the University of Patras (as part of the cooperation in action COST 291).
In the course of the project, control algorithms for an optical switch and optical buffers were also developed. The properties of the proposed algorithms were examined by means of computer simulation evaluating the following parameters: maximum buffer occupancy depending on input load, mean packet delay in the case of using infinite-size buffers, packet loss probability and mean packet delay in the case of finite-size buffers containing 15, 31 and 63 packets. Simulation experiments were also conducted for a 3-stage Clos network involving FDL (Fibre Delay Lines) as optical buffers in the first stage, and two control algorithms: SEFAC (SEquential FDL Assignment for Clos-network switches) and MUFAC (MUlticell FDL Assignment for Clos-network switches).
The possibilities of implementing the proposed optical buffer solutions were assessed in cooperation with partners from the University of Patras (Greece) and the School of Information & Communication Technology of the KTH-Royal Institute of Technology of Kista (Sweden) who have the proper equipment, software and practical experience.
Publications, reports or patents resulting from the project
| 01. | ] W. Kabaciński and S. Węclewski, “New switch architectures with optical buffering using {QD-SOA} devices,” in Polish Teletraffic Symposium (PSRT), pp. 43-51, 2007. |
| 02. | W. Kabaciński, S. Węclewski, and M. Żal, “RCOST 291 - wielokrotne optyczne bufory wyjściowe,” Przegląd Telekomun., vol. LXXX, no. 8–9, pp. 779–784, Sep. 2007. |
| 03. | K. Vlachos, W. Kabaciński, and S. Węclewski, “New Architectures for Optical Packet Switching using {QD-SOAs} for Multi-Wavelength Buffering,” in High Performance Switching and Routing, 2008 (HPSR 2008), pp. 74–79, 2008. |
| 04. | W. Kabaciński, J. Chen, G. Danilewicz, J. Kleban, M. Spyropoulou, I. Tomkos, E. Varvarigos, K. Vlachos, S. Węclewski, L. Wosinska, and K. Yiannopoulos, “Novel Switch Architectures,” in Lecture Notes in Computer Science, I. Tomkos, M. Spyropoulou, K. Ennser, M. Köhn, and B. Mikac, Eds. Berlin Heidelberg: Springer, pp. 133-160, 2009. |
Supervisor/coordinator
prof. dr hab. inż. Wojciech KabacińskiProject Manager (PUT)
prof. dr hab. inż. Wojciech KabacińskiProject participants (PUT)
prof. dr hab. inż. Wojciech Kabacińskidr hab. inż. Grzegorz Danilewicz, prof. nadzw.
dr hab. inż. Mariusz Żal
dr inż. Janusz Kleban
Anna Baranowska
Sławomir Węclowski