@article{HossfeldHeegaardVarelaetal.2024, author = {Hoßfeld, Tobias and Heegaard, Poul E. and Varela, Mart{\´i}n and Jarschel, Michael}, title = {User-centric Markov reward model for state-dependent Erlang loss systems}, volume = {2024}, pages = {102425}, journal = {Performance Evaluation}, number = {165}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0166-5316}, doi = {https://doi.org/10.1016/j.peva.2024.102425}, year = {2024}, abstract = {Markov reward models are commonly used in the analysis of systems by integrating a reward rate to each system state. Typically, rewards are defined based on system states and reflect the system's perspective. From a user's point of view, it is important to consider the changing system conditions and dynamics while the user consumes a service. The key contributions of this paper are proper definitions for (i) system-centric reward and (ii) user-centric reward of the Erlang loss model M/M/n-0 and M/M(x)/n with state-dependent service rates, as well as (iii) the analysis of the relationships between those metrics. Our key result allows a simple computation of the user-centric rewards. The differences between the system-centric and the user-centric rewards are demonstrated for a real-world cloud gaming use case. To the best of our knowledge, this is the first analysis showing the relationship between user-centric rewards and system-centric rewards. This work gives relevant and important insights in how to integrate the user's perspective in the analysis of Markov reward models and is a blueprint for the analysis of other services beyond cloud gaming while also considering user engagement.}, language = {en} } @inproceedings{JarschelMetterZinneretal.2014, author = {Jarschel, Michael and Metter, Christopher and Zinner, Thomas and Gebert, Steffen and Tran-Gia, Phuoc}, title = {OFCProbe: A platform-independent tool for OpenFlow controller analysis}, booktitle = {2014 IEEE Fifth International Conference on Communications and Electronics (ICCE)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-5051-5}, doi = {https://doi.org/10.1109/CCE.2014.6916700}, pages = {182 -- 187}, year = {2014}, language = {en} } @article{JarschelZinnerHossfeldetal.2014, author = {Jarschel, Michael and Zinner, Thomas and Hossfeld, Tobias and Tran-Gia, Phuoc and Kellerer, Wolfgang}, title = {Interfaces, attributes, and use cases: A compass for SDN}, volume = {52}, journal = {IEEE Communications Magazine}, number = {6}, publisher = {IEEE}, address = {New York}, issn = {1558-1896}, doi = {https://doi.org/10.1109/MCOM.2014.6829966}, pages = {210 -- 217}, year = {2014}, language = {en} } @inproceedings{ZinnerJarschelBlenketal.2014, author = {Zinner, Thomas and Jarschel, Michael and Blenk, Andreas and Wamser, Florian and Kellerer, Wolfgang}, title = {Dynamic application-aware resource management using Software-Defined Networking: Implementation prospects and challenges}, booktitle = {2014 IEEE Network Operations and Management Symposium (NOMS)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-0913-1}, doi = {https://doi.org/10.1109/NOMS.2014.6838404}, year = {2014}, language = {en} } @inproceedings{JarschelZinnerHohnetal.2014, author = {Jarschel, Michael and Zinner, Thomas and Hohn, Thomas and Tran-Gia, Phuoc}, title = {On the accuracy of leveraging SDN for passive network measurements}, booktitle = {2013 Australasian Telecommunication Networks and Applications Conference (ATNAC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-1081-6}, doi = {https://doi.org/10.1109/ATNAC.2013.6705354}, pages = {41 -- 46}, year = {2014}, language = {en} } @inproceedings{JarschelWamserHohnetal.2013, author = {Jarschel, Michael and Wamser, Florian and Hohn, Thomas and Zinner, Thomas and Tran-Gia, Phuoc}, title = {SDN-Based Application-Aware Networking on the Example of YouTube Video Streaming}, booktitle = {Proceedings: 2013 Second European Workshop on Software Defined Networks (EWSDN 2013)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-2433-2}, doi = {https://doi.org/10.1109/EWSDN.2013.21}, pages = {87 -- 92}, year = {2013}, language = {en} } @inproceedings{HockHartmannGebertetal.2013, author = {Hock, David and Hartmann, Matthias and Gebert, Steffen and Jarschel, Michael and Zinner, Thomas and Tran-Gia, Phuoc}, title = {Pareto-optimal resilient controller placement in SDN-based core networks}, booktitle = {Proceedings of the 2013 25th International Teletraffic Congress (ITC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-0-9836283-7-8}, doi = {https://doi.org/10.1109/ITC.2013.6662939}, year = {2013}, language = {en} } @article{JarschelSchlosserScheuringetal.2011, author = {Jarschel, Michael and Schlosser, Daniel and Scheuring, Sven and Hoßfeld, Tobias}, title = {Gaming in the clouds: QoE and the users' perspective}, volume = {57}, journal = {Mathematical and Computer Modelling}, number = {11-12}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0895-7177}, doi = {https://doi.org/10.1016/j.mcm.2011.12.014}, pages = {2883 -- 2894}, year = {2011}, language = {en} } @inproceedings{JarschelLehriederMagyarietal.2012, author = {Jarschel, Michael and Lehrieder, Frank and Magyari, Zsolt and Pries, Rastin}, title = {A Flexible OpenFlow-Controller Benchmark}, booktitle = {Proceedings: European Workshop on Software Defined Networks (EWSDN 2012)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4673-4554-5}, doi = {https://doi.org/10.1109/EWSDN.2012.15}, pages = {48 -- 53}, year = {2012}, language = {en} } @article{JarschelPries2012, author = {Jarschel, Michael and Pries, Rastin}, title = {An OpenFlow-based energy-efficient data center approach}, volume = {42}, journal = {ACM SIGCOMM Computer Communication Review}, number = {4}, publisher = {ACM}, address = {New York}, issn = {0146-4833}, doi = {https://doi.org/10.1145/2377677.2377694}, pages = {87 -- 88}, year = {2012}, language = {en} } @inproceedings{PriesJarschelGoll2012, author = {Pries, Rastin and Jarschel, Michael and Goll, Sebastian}, title = {On the usability of OpenFlow in data center environments}, booktitle = {2012 IEEE International Conference on Communications (ICC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4577-2053-6}, doi = {https://doi.org/10.1109/ICC.2012.6364891}, pages = {5533 -- 5537}, year = {2012}, language = {en} } 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{IEEE}, address = {Piscataway}, isbn = {978-3-901882-77-7}, doi = {https://doi.org/10.1109/CNSM.2015.7367386}, pages = {378 -- 383}, year = {2015}, language = {en} } @inproceedings{NguyenNgocLangeGebertetal.2016, author = {Nguyen-Ngoc, Anh and Lange, Stanislav and Gebert, Steffen and Zinner, Thomas and Tran-Gia, Phuoc and Jarschel, Michael}, title = {Performance evaluation mechanisms for FlowMod message processing in OpenFlow switches}, booktitle = {IEEE ICCE 2016: 2016 IEEE Sixth International Conference on Communications and Electronics (IEEE ICCE 2016)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-5090-1801-7}, doi = {https://doi.org/10.1109/CCE.2016.7562610}, pages = {40 -- 45}, year = {2016}, language = {en} } @inproceedings{PriesMorperGalambosietal.2016, author = {Pries, Rastin and Morper, Hans-Jochen and Galambosi, Nandor and Jarschel, Michael}, title = {Network as a Service - A Demo on 5G Network Slicing}, booktitle = {Proceedings of the 28th International 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