Miroslaw Klinkowski

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A spectrum-sliced elastic optical path network (SLICE) architecture has been recently proposed as an efficient solution for a flexible bandwidth allocation in optical networks. In SLICE, the problem of Routing and Spectrum Assignment (RSA) emerges. In this letter, we both formulate RSA as an Integer Linear Programming (ILP) problem and propose an effective(More)
Flexgrid optical networks are attracting huge interest due to their higher spectrum efficiency and flexibility in comparison with traditional wavelength switched optical networks based on the wavelength division multiplexing technology. To properly analyze, design, plan, and operate flexible and elastic networks, efficient methods are required for the(More)
Elastic flexgrid optical networks (FG-ON) are considered a very promising solution for next-generation optical networks. In this article we focus on lightpath adaptation under variable traffic demands in FG-ON. Specifically, we explore the elastic spectrum allocation (SA) capability of FG-ON and, in this context, we study the effectiveness of three(More)
1389-1286/$ see front matter 2008 Elsevier B.V doi:10.1016/j.comnet.2008.11.014 * Corresponding author. Address: Athens Informat Markopoulo Ave., 19002 Peania, Athens, Greece. Te E-mail addresses: sazo@ait.edu.gr, siamak@ac. molky), mklinkow@ac.upc.edu (M. Klinkowski), Marin), careglio@ac.upc.edu (D. Careglio), pareta@ac itom@ait.edu.gr (I. Tomkos). Optical(More)
In this paper, we address the problem of adaptive routing in connection-oriented optical packet switched core networks. We propose several strategies that due to dynamic path selection balance the traffic load inside the network (i.e., implementing traffic engineering functionalities). In addition, proposed algorithms operating in per-packet mode introduce(More)
Finding optimal routes and spectrum allocation in flexgrid optical networks, known as the RSA problem, is an important design problem in transport communication networks. The problem is $$\mathcal{NP }$$ NP -hard, and its intractability becomes profound when network instances with several tens of nodes and several hundreds of demands are to be solved to(More)
Elastic Optical Network (EON) architectures are a very promising solution for next generation optical networks. In EON, a basic problem in network design and operation is the problem of Routing and Spectrum Allocation (RSA). In this work, we focus on RSA in a survivable EON with Dedicated Path Protection (DPP) consideration. Since RSA is a difficult problem(More)