Ireneusz Szczesniak

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This paper presents an analytical methodology to obtain steady state throughput of a uniformly and fully loaded regular network. The network operates using deflection routing under the condition that a data packet is allowed to experience a finite number of deflections. Unlike the published analytical methods, the proposed method allows the analysis of a(More)
We present an approximate analytical method for the evaluation of packet loss probability in synchronous optical packet-switched networks which operate under limited deflection routing with the contention resolution method based on priorities. Packets are lost because they are removed by nodes. They are removed because they experience too many deflections(More)
A software package, dxhdf5, for importing HDF5 data into OpenDX is discussed. HDF5 is a hierarchical, self-describing data format that is rapidly becoming a standard for storing large, portable data sets, such as those generated through highperformance computing. OpenDX, formerly IBM Data Explorer, is a visualization package for examining data of any(More)
We present an optimal and efficient algorithm for finding a shortest path in an elastic optical network. The algorithm is an adaptation of the Dijkstra shortest path algorithm, where we take into account the spectrum continuity and contiguity constraints, and a limit on the path length. The adaptation redefines the node label in the Dijkstra algorithm,(More)
We propose the novel idea of interoperator fixed-mobile network sharing, which can be software-defined and readily-deployed. We study the benefits which the sharing brings in terms of resiliency, and show that, with the appropriate placement of a few active nodes, the mean service downtime can be reduced more than threefold by providing interoperator(More)
In the paper we analyze the steady-state performance of a bufferless optical packet-switched node that works synchronously under the Poisson traffic. Given the admission control and routing algorithms we compute the mean rates at which packets are admitted into the network and probabilities with which packets are lost or leave the nodes along specific(More)
Optical packet switching has been researched for about two decades, but it has not been deployed in commercial networks yet. Nonetheless, the research on optical packet switching continues as it promises to perform better than electronic hardware. We report on the established results of optical packet switching, and examine the reasons for its current state.
We propose an optical interconnection network with the wavelength time slot routing, a novel routing scheme that allows for a simple design of optical interconnection networks. The simulative performance evaluation shows that the proposed scheme demonstrates optimum performance at the maximum uniform exponential network load, and performs well in comparison(More)
We evaluate the downstream performance of our novel interoperator fixed-mobile network sharing, in which operators exchange data in their access networks. We propose a performance evaluation algorithm, and report credible performance evaluation results obtained for 204600 randomly-generated passive optical networks. We show that with the proposed sharing,(More)