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Piotr Lechowicz
Wrocław University of Technology
23Publications
6H-index
98Citations
Publications 23
Newest
#1Piotr LechowiczH-Index: 6
#2Roza GoscienH-Index: 10
Last.Krzysztof WalkowiakH-Index: 18
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This article identifies the unavoidably required upgrade of short-term realizable elastic optical networks (EONs) operating over single-mode fibers toward spectrally-spatially flexible optical networks (SS-FONs), exploiting spatial division multiplexing (SDM) technology in order to cope with the expected mid- and long-term future traffic forecasts. Since a complete EON to SS-FON network migration overnight is unrealistic, this article proposes a gradual greenfield migration strategy employing no...
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#1Krzysztof WalkowiakH-Index: 18
#2Roza GoscienH-Index: 10
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Optimization of lightpath provisioning in a spectrally-spatially flexible optical network (SS-FON) is challenging due to many difficult constraints that exist in optical networks and because of limited amounts of various transmission resources (such as spectrum, spatial modes, transceivers, regeneration points). Previously demonstrated approaches usually apply fixed provisioning policies (e.g., heuristics for routing, space and spectrum assignment (RSSA)) and fail to completely address the chara...
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Abstract Evolutionary methods are well-known tools used for solving hard computational problems. In this paper, we consider k-Shortest Steiner Trees (kSST) problem appearing in a diverse set of domains, e.g., multicast tree construction in communication networks in general, and optical networks in particular. The kSST is relatively new and has not been widely investigated in the literature. Thus, only a few algorithms have been proposed, each requiring significant resources amount and long execu...
1 CitationsSource
#1Piotr LechowiczH-Index: 6
#2Ruben Rumipamba-Zambrano (UPC: Polytechnic University of Catalonia)H-Index: 4
Last.Krzysztof WalkowiakH-Index: 18
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We study inter-core crosstalk (ICXT) impact on migration planning toward spectrally-spatially flexible optical networks considering 22-core multi-core fiber. Results reveal, 55-70% of links need to be upgraded when ICXT ranges from −68.2 to −43.4 dB/km.1
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#1Krzysztof WalkowiakH-Index: 18
#2Róża GościeńH-Index: 4
Last.Miroslaw KlinkowskiH-Index: 21
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We focus on spectrally-spatially flexible optical networks and analyze benefits of adjusting the number of active spatial modes in network links using various metrics based on data analytics with the goal to maximize the served traffic.1
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#1Roza GoscienH-Index: 10
#2Piotr LechowiczH-Index: 6
#1Piotr LechowiczH-Index: 6
#2Krzysztof WalkowiakH-Index: 18
Last.Miroslaw KlinkowskiH-Index: 21
view all 3 authors...
Abstract The volume of data traffic in backbone networks is increasing at a speed that exceeds the growth rates of capacities offered in currently used wavelength division multiplexing (WDM) networks. As a short term solution to the potential capacity crunch, the concept of flexible-grid elastic optical networks is nowadays implemented in many backbone networks. However, in a longer term the space division multiplexing (SDM) technology is the most promising solution for satisfying the capacity r...
1 CitationsSource
Dec 1, 2018 in GLOBECOM (Global Communications Conference)
#1Krzysztof Walkowiak (Wrocław University of Technology)H-Index: 18
#2Piotr Lechowicz (Wrocław University of Technology)H-Index: 6
Last.Miroslaw Klinkowski (UPC: Polytechnic University of Catalonia)H-Index: 21
view all 3 authors...
In this paper, we analyze the problem of transceiver sharing in survivable spectrally-spatially flexible optical networks (SS-FONs) that realize transmission of spectral super-channels and where flexible signal regeneration is provided by transceivers operating in back-to-back (B2B) configurations. Namely, to improve network throughput, we propose to use a backup transceiver sharing approach for protection of lightpaths provisioned in the network. To address the considered problem, we develop an...
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#1Piotr LechowiczH-Index: 6
#2Salvatore Spadaro (UPC: Polytechnic University of Catalonia)H-Index: 18
Last.Jordi Perello (UPC: Polytechnic University of Catalonia)H-Index: 13
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We focus on a migration planning from elastic to spectrally-spatially flexible optical networks by upgrading regular with SDM-capable ROADMs. Our most promising strategy reveals that by migrating 30% of the regular ROADMs a 2x carried traffic increase can be achieved.
1 CitationsSource
#1Krzysztof WalkowiakH-Index: 18
#2Piotr LechowiczH-Index: 6
Last.Miroslaw KlinkowskiH-Index: 21
view all 3 authors...
In this article, we address the problem of survivable routing in spectrally-spatially flexible optical networks (SS-FONs) with dedicated path protection (DPP). The considered SS-FON supports spectral super-channel transmissions, in which flexible signal regeneration is realized with transceivers operating in back-to-back (B2B) configurations. We propose an Adaptive Survivable Routing with Back-to-Back Regeneration (ASRBR) algorithm to realize dynamic routing requests protected with the DPP metho...
1 CitationsSource
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