Multi-Granular Optical Cross-Connect: Design, Analysis, and Demonstration

Georgios S. Zervas, Marc De Leenheer, Lida Sadeghioon, Dimitris Klonidis, Yixuan Qin, Reza Nejabati, Dimitra Simeonidou, Chris Develder, Bart Dhoedt, Piet Demeester

Research output: Contribution to journalArticle (Academic Journal)

47 Citations (Scopus)


A fundamental issue in all-optical switching is to offer efficient and cost-effective transport services for a wide range of bandwidth granularities. This paper presents multi-granular optical cross-connect (MG-OXC) architectures that combine slow (ms regime) and fast (ns regime) switch elements, in order to support optical circuit switching (OCS), optical burst switching (OBS), and even optical packet switching (OPS). The MG-OXC architectures are designed to provide a cost-effective approach, while offering the flexibility and reconfigurability to deal with dynamic requirements of different applications. All proposed MG-OXC designs are analyzed and compared in terms of dimensionality, flexibility/reconfigurability, and scalability. Furthermore, node level simulations are conducted to evaluate the performance of MG-OXCs under different traffic regimes. Finally, the feasibility of the proposed architectures is demonstrated on an application-aware, multi-bit-rate (10 and 40 Gbps), end-to-end OBS testbed.

Original languageEnglish
Pages (from-to)69-84
Number of pages16
JournalIEEE/OSA Journal of Optical Communications and Networking
Issue number1
Publication statusPublished - 1 Jun 2009

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