@{MTMT:23945813, title = {Traffic Grooming. Combinatorial results and practical resolutions}, url = {https://m2.mtmt.hu/api/publication/23945813}, author = {Cinkler, Tibor and Coudert, David and Flammini, Michele and Monaco, Gianpiero and Moscardelli, Luca and Munoz, Xavier and Sau, Ignasi and Shalom, Mordechai and Zaks, Shmuel}, booktitle = {Graphs and algorithms in communication networks}, doi = {10.1007/978-3-642-02250-0_2}, publisher = {Springer Netherlands}, unique-id = {23945813}, year = {2010}, pages = {63-94} } @article{MTMT:2645157, title = {Automated adaptive on-line Multi-Layer Traffic Engineering through "tailoring"' wavelength-paths in the Fragment Graph}, url = {https://m2.mtmt.hu/api/publication/2645157}, author = {Cinkler, Tibor and Hegyi, Péter}, doi = {10.1016/j.osn.2009.05.002}, journal-iso = {OPT SWITCH NETW}, journal = {OPTICAL SWITCHING AND NETWORKING}, volume = {6}, unique-id = {2645157}, issn = {1573-4277}, abstract = {In Multi-Layer networks, where more than one layer is switched, i.e., connections are set up using not only the upper, e.g., IP layer but the underlying wavelength layer as well leads often to suboptimal performance due to long wavelength paths, that do not allow routing the traffic along the shortest path. The role of MLTE (Multi-Layer Traffic Engineering) is to cut (fragment) these long wavelength-paths into parts (fragments) that allow better routing at the upper layer, or to concatenate (defragment) two or more fragments into longer paths when the network load is low and therefore ^ fewer hops are preferred. In this paperwepresent a new model, the Fragment Graph (FG) and an algorithm for this model that supports Fragmentation and De-Fragmentation of wavelength paths making the network always instantly adapt to changing traffic conditions. We introduce the notion of shadow links to model ``#?#-path tailoring''. We implicitly assume that the wavelength paths carry such, e.g., IP traffic that can be interrupted for a few milliseconds and that even allows minor packet reordering. To show the superior performance of our approach in various network and traffic conditions we have carried out an intensive simulation study where we compare blocking ratios and path lengths and we analyze the dynamic behavior and fairness of the proposed and of reference methods.}, year = {2009}, eissn = {1872-9770}, pages = {194-214}, orcid-numbers = {Hegyi, Péter/0000-0003-2384-8576} } @inproceedings{MTMT:2618027, title = {Adaptive Multi-Layer Traffic Engineering with Shared Risk Group Protection}, url = {https://m2.mtmt.hu/api/publication/2618027}, author = {Cinkler, Tibor and Hegyi, Péter and Geleji, Géza and Szigeti, János and Ladányi, Ákos}, booktitle = {2008 IEEE International Conference on Communications, Vols 1-13}, doi = {10.1109/ICC.2008.1006}, unique-id = {2618027}, year = {2008}, pages = {5367-5371}, orcid-numbers = {Hegyi, Péter/0000-0003-2384-8576; Ladányi, Ákos/0000-0002-3974-0722} } @inproceedings{MTMT:2605497, title = {Protection for Adaptive Multi-Layer Traffic Engineering}, url = {https://m2.mtmt.hu/api/publication/2605497}, author = {Cinkler, Tibor and Hegyi, Péter and Geleji, Géza and Szigeti, János}, booktitle = {DRCN 2007, 6th International Workshop on the Design of Reliable Communication Networks}, doi = {10.1109/DRCN.2007.4762288}, unique-id = {2605497}, year = {2007}, pages = {266-272}, orcid-numbers = {Hegyi, Péter/0000-0003-2384-8576} } @article{MTMT:2627458, title = {Rule-based advertisement and maintenance of network state information in optical-beared heterogeneous networks}, url = {https://m2.mtmt.hu/api/publication/2627458}, author = {Szigeti, János and Cinkler, Tibor}, doi = {10.1007/978-3-540-72731-6_31}, journal-iso = {LECT NOTES COMPUT SC}, journal = {LECTURE NOTES IN COMPUTER SCIENCE}, volume = {4534}, unique-id = {2627458}, issn = {0302-9743}, abstract = {A more flexible routing of better performance can be achieved in multilayer networks when the controllers of different network layers are "peering" instead of "overlaying", i.e., instead of the simple overlay model the peer interconnection or the vertically integrated model is used, and Label Switched Paths are searched in a Wavelength Graph that represents the network state very accurately. However, routing in "Peer network" does not only require large databases for storing the Wavelength Graph and complex path-search algorithms, it also increases the load of control channels, as more link state changes must be advertised. Much of the link state information is, however, redundant as the state changes are not independent. In this paper we propose a method for topology information advertisement and maintenance to significantly reduce the amount of control messages without deteriorating the quality of routing.}, year = {2007}, eissn = {1611-3349}, pages = {279-288} } @article{MTMT:1789071, title = {Multi-Layer Traffic Engineering through Adaptive Lambda-path Fragmentation and De-Fragmentation: The Grooming-Graph and Shadow-Capacities}, url = {https://m2.mtmt.hu/api/publication/1789071}, author = {Cinkler, Tibor and Hegyi, Péter and Asztalos, Márk and Geleji, Géza and Kern, András and Szigeti, János}, doi = {10.1007/11753810_60}, journal-iso = {LECT NOTES COMPUT SC}, journal = {LECTURE NOTES IN COMPUTER SCIENCE}, volume = {3976}, unique-id = {1789071}, issn = {0302-9743}, year = {2006}, eissn = {1611-3349}, pages = {715-726}, orcid-numbers = {Hegyi, Péter/0000-0003-2384-8576} } @article{MTMT:1789078, title = {A hullámhossz-utak adaptív fragmentálása forgalomkötegeléses WDM optikai hálózatokban}, url = {https://m2.mtmt.hu/api/publication/1789078}, author = {Geleji, Géza and Asztalos, Márk and Cinkler, Tibor and Hegyi, Péter}, journal-iso = {HIRADÁSTECHNIKA}, journal = {HIRADÁSTECHNIKA (1962)}, volume = {61}, unique-id = {1789078}, issn = {0018-2028}, year = {2006}, pages = {54-59}, orcid-numbers = {Hegyi, Péter/0000-0003-2384-8576} } @inproceedings{MTMT:2605501, title = {Joint Grooming Capability and Wavelength Number Optimization with Protection}, url = {https://m2.mtmt.hu/api/publication/2605501}, author = {Perényi, Marcell Ádám and Hegyi, Péter and Szigeti, János and Cinkler, Tibor and Sallai, Gyula}, booktitle = {WTC 2006}, unique-id = {2605501}, year = {2006}, pages = {1-8}, orcid-numbers = {Hegyi, Péter/0000-0003-2384-8576; Sallai, Gyula/0000-0002-8062-3042} } @inproceedings{MTMT:2612974, title = {Joint Grooming Capability and Wavelength Number Optimization}, url = {https://m2.mtmt.hu/api/publication/2612974}, author = {Perényi, Marcell Ádám and Ladányi, Ákos and Cinkler, Tibor}, booktitle = {2005 7th International Conference on Transparent Optical Networks, Vol 1, Proceedings}, doi = {10.1109/ICTON.2005.1505757}, unique-id = {2612974}, year = {2005}, pages = {77-84}, orcid-numbers = {Ladányi, Ákos/0000-0002-3974-0722} } @inproceedings{MTMT:2619979, title = {Efficiency of Information Update Strategies for Automatically Switched Multi-domain Optical Networks}, url = {https://m2.mtmt.hu/api/publication/2619979}, author = {Szigeti, János and Ballók, István and Cinkler, Tibor}, booktitle = {2005 7th International Conference on Transparent Optical Networks, Vol 1, Proceedings}, doi = {10.1109/ICTON.2005.1505840}, unique-id = {2619979}, abstract = {The routing and wavelength assignment algorithm is a complex task in today's dynamically switched networks. As the number of network nodes and links increases, advertising link states requires more control messages, larger databases and more processing capacity while searching for an available path. Information aggregation in multi-domain networks helps us to reduce the number of advertised links. Furthermore, there are numerous information update strategies that also result in less link state control messages. However, these enhancements are done on the account of information inaccuracy, which leads to higher blocking ratio and longer setup delays. In our article we present a Physical Device Abstraction Layer for the Control Plane where interior optical switches having different multiplexing capabilities and exterior autonomous domains are treated in a unified way. Next we show and analyse solutions for how to apply information update strategies on multilayer networks and how to extend these strategies to fit into multidomain environment.}, year = {2005}, pages = {445-454} } @misc{MTMT:23931136, title = {Routing, TE and Resilience in Heterogeneous GMPLS Networks. WGN5: V Workshop in G/MPLS networks}, url = {https://m2.mtmt.hu/api/publication/23931136}, author = {Tibor, Cinkler}, unique-id = {23931136}, year = {2005} }