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61 Publications


2024 | Journal Article | LibreCat-ID: 53531
Ghafouri, S., Razavi, K., Salmani, M., Sanaee, A., Lorido Botran, T., Wang, L., Doyle, J., & Jamshidi, P. (n.d.). IPA: Inference Pipeline Adaptation to Achieve High Accuracy and Cost-Efficiency. Journal of Systems Research (JSys).
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2022 | Journal Article | LibreCat-ID: 32854
Redder, A., Ramaswamy, A., & Karl, H. (2022). Practical Network Conditions for the Convergence of Distributed Optimization. IFAC-PapersOnLine, 55(13), 133–138.
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2021 | Journal Article | LibreCat-ID: 21808 | OA
Schneider, S. B., Khalili, R., Manzoor, A., Qarawlus, H., Schellenberg, R., Karl, H., & Hecker, A. (2021). Self-Learning Multi-Objective Service Coordination Using Deep Reinforcement Learning. Transactions on Network and Service Management. https://doi.org/10.1109/TNSM.2021.3076503
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2020 | Journal Article | LibreCat-ID: 16278
Nomikos, N., Michailidis, E. T., Trakadas, P., Vouyioukas, D., Karl, H., Martrat, J., … Voliotis, S. (2020). A UAV-based moving 5G RAN for massive connectivity of mobile users and IoT devices. Vehicular Communications. https://doi.org/10.1016/j.vehcom.2020.100250
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2020 | Journal Article | LibreCat-ID: 16280
Li, F., Yu, D., Yang, H., Yu, J., Karl, H., & Cheng, X. (2020). Multi-Armed-Bandit-Based Spectrum Scheduling Algorithms in Wireless Networks: A Survey. IEEE Wireless Communications, 24–30. https://doi.org/10.1109/mwc.001.1900280
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2020 | Journal Article | LibreCat-ID: 13770
Karl, H., Kundisch, D., Meyer auf der Heide, F., & Wehrheim, H. (2020). A Case for a New IT Ecosystem: On-The-Fly Computing. Business & Information Systems Engineering, 62(6), 467–481. https://doi.org/10.1007/s12599-019-00627-x
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2019 | Journal Article | LibreCat-ID: 8113 | OA
Peuster, M., Dröge, C., Boos, C., & Karl, H. (2019). Joint testing and profiling of microservice-based network services using TTCN-3. ICT Express. https://doi.org/10.1016/j.icte.2019.02.001
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2019 | Journal Article | LibreCat-ID: 8795 | OA
Peuster, M., Küttner, H., & Karl, H. (2019). A flow handover protocol to support state migration in softwarized networks. International Journal of Network Management. https://doi.org/10.1002/nem.2067
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2019 | Journal Article | LibreCat-ID: 9823
Soenen, T., Tavernier, W., Peuster, M., Vicens, F., Xilouris, G., Kolometsos, S., … Colle, D. (2019). Empowering Network Service Developers: Enhanced NFV DevOps and Programmable MANO. IEEE Communications Magazine, 89–95. https://doi.org/10.1109/mcom.2019.1800810
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2019 | Journal Article | LibreCat-ID: 9824 | OA
Peuster, M., Schneider, S. B., Zhao, M., Xilouris, G., Trakadas, P., Vicens, F., … Karl, H. (2019). Introducing Automated Verification and Validation for Virtualized Network Functions and Services. IEEE Communications Magazine, 96–102. https://doi.org/10.1109/mcom.2019.1800873
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2019 | Journal Article | LibreCat-ID: 15741
Leong, A. S., Ramaswamy, A., Quevedo, D. E., Karl, H., & Shi, L. (2019). Deep reinforcement learning for wireless sensor scheduling in cyber–physical systems. Automatica. https://doi.org/10.1016/j.automatica.2019.108759
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2019 | Journal Article | LibreCat-ID: 10325 | OA
Peuster, M., Marchetti, M., García de Blas, G., & Karl, H. (2019). Automated testing of NFV orchestrators against carrier-grade multi-PoP scenarios using emulation-based smoke testing. EURASIP Journal on Wireless Communications and Networking. https://doi.org/10.1186/s13638-019-1493-2
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2018 | Journal Article | LibreCat-ID: 3152 | OA
Dräxler, S., Karl, H., & Mann, Z. A. (2018). JASPER: Joint Optimization of Scaling, Placement, and Routing of Virtual Network Services. IEEE Transactions on Network and Service Management. https://doi.org/10.1109/TNSM.2018.2846572
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2017 | Journal Article | LibreCat-ID: 58 | OA
Dräxler, S., & Karl, H. (2017). Specification, Composition, and Placement of Network Services with Flexible Structures. International Journal of Network Management, (2), 1--16. https://doi.org/10.1002/nem.1963
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2017 | Journal Article | LibreCat-ID: 64
Keller, M., & Karl, H. (2017). Response-Time-Optimised Service Deployment: MILP Formulations of Piece-wise Linear Functions Approximating Non-linear Bivariate Mixed-integer Functions. IEEE Transactions on Network and Service Management, (1), 121--135. https://doi.org/10.1109/TNSM.2016.2611590
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2016 | Journal Article | LibreCat-ID: 714 | OA
Karl, H., Dräxler, S., Peuster, M., Galis, A., Bredel, M., Ramos, A., … Xilouris, G. (2016). DevOps for network function virtualisation: an architectural approach. Transactions on Emerging Telecommunications Technologies, 27(9), 1206–1215. https://doi.org/10.1002/ett.3084
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2016 | Journal Article | LibreCat-ID: 726
Wette, P., & Karl, H. (2016). DCT2Gen: A traffic generator for data centers. Computer Communications, 45--58. https://doi.org/10.1016/j.comcom.2015.12.001
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2016 | Journal Article | LibreCat-ID: 1373
Herlich, M., Bredenbals, N., & Karl, H. (2016). Delayed (de-)activation in servers with a sleep mode. Sustainable Computing: Informatics and Systems, 10, 48–55. https://doi.org/10.1016/j.suscom.2016.04.002
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2014 | Journal Article | LibreCat-ID: 467
Künsemöller, J., & Karl, H. (2014). A Game-Theoretic Approach to the Financial Benefits of Infrastructure-as-a-Service. Future Generation Computer Systems, 44--52. https://doi.org/10.1016/j.future.2014.03.005
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2014 | Journal Article | LibreCat-ID: 753
Beister, F., Dräxler, M., Aelken, J., & Karl, H. (2014). Power model design for ICT systems -- A generic approach. Computer Communications, 77--85. https://doi.org/10.1016/j.comcom.2014.02.007
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2014 | Journal Article | LibreCat-ID: 754
Azeem M. Khan, R., & Karl, H. (2014). MAC Protocols for Cooperative Diversity in Wireless LANs and Wireless Sensor Networks. IEEE Communications Surveys and Tutorials, (1), 46--63. https://doi.org/10.1109/SURV.2013.042313.00067
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2014 | Journal Article | LibreCat-ID: 1375
Beister, F., Dräxler, M., Aelken, J., & Karl, H. (2014). Power model design for ICT systems – A generic approach. Computer Communications, 50, 77–85. https://doi.org/10.1016/j.comcom.2014.02.007
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2013 | Journal Article | LibreCat-ID: 770
Dannewitz, C., Kutscher, D., Ohlman, B., Farrell, S., Ahlgren, B., & Karl, H. (2013). Network of Information (NetInf) - An information-centric networking architecture. Computer Communications, (7), 721--735. https://doi.org/10.1016/j.comcom.2013.01.009
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2013 | Journal Article | LibreCat-ID: 771
Dräxler, M., Biermann, T., & Karl, H. (2013). Improving Cooperative Transmission Feasibility by Network Reconfiguration in Limited Backhaul Networks. International Journal of Wireless Information Networks, (3), 183--194. https://doi.org/10.1007/s10776-013-0207-7
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2013 | Journal Article | LibreCat-ID: 769
Biermann, T., Scalia, L., Choi, C., Kellerer, W., & Karl, H. (2013). How backhaul networks influence the feasibility of coordinated multipoint in cellular networks. {IEEE} Communications Magazine, (8). https://doi.org/10.1109/MCOM.2013.6576356
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2012 | Journal Article | LibreCat-ID: 782
Biermann, T., Scalia, L., Choi, C., Karl, H., & Kellerer, W. (2012). CoMP clustering and backhaul limitations in cooperative cellular mobile access networks. Pervasive and Mobile Computing, (5), 662--681. https://doi.org/10.1016/j.pmcj.2012.03.005
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2012 | Journal Article | LibreCat-ID: 783
Willig, A., Karl, H., & Kipnis, D. (2012). Segment-based packet combining: how to schedule a dense relayer cluster? Wireless Networks, (2), 199--213. https://doi.org/10.1007/s11276-011-0395-y
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2011 | Journal Article | LibreCat-ID: 793
Ahlgren, B., A. Aranda-Gutierrez, P., Chemouil, P., Oueslati, S., M. Correia, L., Karl, H., … Welin, A. (2011). Content, connectivity, and cloud: ingredients for the network of the future. IEEE Communications Magazine, (7), 62--70. https://doi.org/10.1109/MCOM.2011.5936156
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2011 | Journal Article | LibreCat-ID: 794
Conti, M., Chong, S., Fdida, S., Jia, W., Karl, H., Lin, Y.-}Dar, … Zukerman, M. (2011). Research challenges towards the Future Internet. Computer Communications, (18), 2115--2134. https://doi.org/10.1016/j.comcom.2011.09.001
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2011 | Journal Article | LibreCat-ID: 1615
Warneke, D., & Dannewitz, C. (2011). Load Balancing in P2P Networks: Using Statistics to Fight Data and Execution Skew. Journal of Advances in Information Technology, 2(1). https://doi.org/10.4304/jait.2.1.40-49
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2011 | Journal Article | LibreCat-ID: 1376
Dannewitz, C., Biermann, T., Dräxler, M., & Karl, H. (2011). Complex Queries in P2P Networks with Resource-Constrained Devices. Journal of Advances in Information Technology, 2(1). https://doi.org/10.4304/jait.2.1.2-14
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2010 | Journal Article | LibreCat-ID: 1831
Valentin, S., & Karl, H. (2010). Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study. European Transactions on Telecommunications, 21(8), 714–724. https://doi.org/10.1002/ett.1454
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2010 | Journal Article | LibreCat-ID: 805
Valentin, S., & Karl, H. (2010). Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study. European Transactions on Telecommunications, (8), 714--724. https://doi.org/10.1002/ett.1454
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2010 | Journal Article | LibreCat-ID: 806
S. Lichte, H., Valentin, S., & Karl, H. (2010). Expected interference in wireless networks with geometric path loss: a closed-form approximation. IEEE Communications Letters, (2), 130--132. https://doi.org/10.1109/LCOMM.2010.02.091863
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2010 | Journal Article | LibreCat-ID: 807
Simon Lichte, H., Valentin, S., & Karl, H. (2010). Automated Development of Cooperative MAC Protocols - A Compiler-Assisted Approach. Mobile Networks and Applications, (6), 769--785. https://doi.org/10.1007/s11036-009-0210-5
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2009 | Journal Article | LibreCat-ID: 814
Biermann, T., Dräxler, M., & Karl, H. (2009). Flow Synchronization for Network Coding. Journal of Communications, (11), 873--884. https://doi.org/10.4304/jcm.4.11.873-884
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2009 | Journal Article | LibreCat-ID: 815
Valentin, S., S. Lichte, H., Karl, H., Vivier, G., Simoens, S., Vidal, J., & Agustin, A. (2009). Cooperative Wireless Networking Beyond Store-and-Forward . Wireless Personal Communications, (1), 49--68. https://doi.org/10.1007/s11277-007-9429-2
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2007 | Journal Article | LibreCat-ID: 830
Festag, A., Karl, H., & Wolisz, A. (2007). Investigation of multicast-based mobility support in all-IP cellular networks. Wireless Communications and Mobile Computing, (3), 319--339. https://doi.org/10.1002/wcm.328
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2007 | Journal Article | LibreCat-ID: 1018
Valentin, S., Lichte, H. S., Karl, H., Simoens, S., Vivier, G., Vidal, J., & Agustin, A. (2007). Implementing cooperative wireless networks. Cognitive Wireless Networks, 155--178. https://doi.org/10.1007/978-1-4020-5979-7_8
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2006 | Journal Article | LibreCat-ID: 837
Hoene, C., Karl, H., & Wolisz, A. (2006). A perceptual quality model intended for adaptive VoIP applications. Int. J. Communication Systems, (3), 299--316. https://doi.org/10.1002/dac.755
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2006 | Journal Article | LibreCat-ID: 838
Gross, J., Geerdes, H.-}Florian, Karl, H., & Wolisz, A. (2006). Performance analysis of dynamic OFDMA systems with inband signaling. IEEE Journal on Selected Areas in Communications, (3), 427--436. https://doi.org/10.1109/JSAC.2005.862386
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2006 | Journal Article | LibreCat-ID: 839
Carlson, E., Prehofer, C., Bettstetter, C., Karl, H., & Wolisz, A. (2006). A Distributed End-to-End Reservation Protocol for IEEE 802.11-Based Wireless Mesh Networks. IEEE Journal on Selected Areas in Communications, (11), 2018--2027. https://doi.org/10.1109/JSAC.2006.881633
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2005 | Journal Article | LibreCat-ID: 842
Ebert, J.-P., Hollos, D., Karl, H., & Löbbers, M. (2005). Does Multi-Hop Communication Reduce Electromagnetic Exposure? Comput. J., (1), 72--83. https://doi.org/10.1093/comjnl/bxh062
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2005 | Journal Article | LibreCat-ID: 843
Savoric, M., Karl, H., Schläger, M., Poschwatta, T., & Wolisz, A. (2005). Analysis and performance evaluation of the EFCM common congestion controller for TCP connections. Computer Networks, (2), 269--294. https://doi.org/10.1016/j.comnet.2005.01.012
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2005 | Journal Article | LibreCat-ID: 844
Gross, J., Valentin, S., Karl, H., & Wolisz, A. (2005). A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system. European Transactions on Telecommunications, (1), 37--49. https://doi.org/10.1002/ett.1030
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2005 | Journal Article | LibreCat-ID: 845
Karl, H., Lentsch, T., & Ritter, H. (2005). Drahtlose Sensornetze. Praxis Der Informationsverarbeitung Und Kommunikation, (2), 66--67. https://doi.org/10.1515/PIKO.2005.66
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2005 | Journal Article | LibreCat-ID: 846
Willig, A., & Karl, H. (2005). Data Transport Reliability in Wireless Sensor Networks. A Survey of Issues and Solutions. Praxis Der Informationsverarbeitung Und Kommunikation, (2), 86--92. https://doi.org/10.1515/PIKO.2005.86
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2005 | Journal Article | LibreCat-ID: 1378
Gross, J., Valentin, S., Karl, H., & Wolisz, A. (2005). A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system. European Transactions on Telecommunications, 16(1), 37–49. https://doi.org/10.1002/ett.1030
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2004 | Journal Article | LibreCat-ID: 850
Gross, J., Klaue, J., Karl, H., & Wolisz, A. (2004). Cross-layer optimization of OFDM transmission systems for MPEG-4 video streaming. Computer Communications, (11), 1044--1055. https://doi.org/10.1016/j.comcom.2004.01.010
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2004 | Journal Article | LibreCat-ID: 851
Niebert, N., Schieder, A., Abramowicz, H., Malmgren, G., Sachs, J., Horn, U., … Karl, H. (2004). Ambient networks: An architecture for communication networks beyond 3G. IEEE Wireless Communications, (2), 14--22. https://doi.org/10.1109/MWC.2004.1295733
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2004 | Journal Article | LibreCat-ID: 993
Klimin, N., Enkelmann, W., Karl, H., & Wolisz, A. (2004). A hybrid approach for location-based service discovery in vehicular ad hoc networks. Proc. of WIT.
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2004 | Journal Article | LibreCat-ID: 998
Mengesha, S., Karl, H., & Wolisz, A. (2004). Capacity increase of multi-hop cellular wlans exploiting data rate adaptation and frequency recycling. Proc. of MedHocNet 2004.
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2004 | Journal Article | LibreCat-ID: 1017
Kubisch, M., Karl, H., & Wolisz, A. (2004). A MAC protocol for wireless sensor networks with multiple selectable, fixed-orientation antennas. Frequenz, (3–4), 92--96. https://doi.org//10.1.1.3.3185
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2003 | Journal Article | LibreCat-ID: 860
Savoric, M., Karl, H., & Wolisz, A. (2003). The TCP control block interdependence in fixed networks - new performance results. Computer Communications, (4), 366--375. https://doi.org/10.1016/S0140-3664(02)00155-X
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2003 | Journal Article | LibreCat-ID: 861
Zirwas, W., Habetha, J., & Karl, H. (2003). Ziel-orientierter Entwurf von Multi-hop Medienzugriffsprotokollen. Praxis Der Informationsverarbeitung Und Kommunikation, (4), 184--189. https://doi.org/10.1515/PIKO.2003.184
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2003 | Journal Article | LibreCat-ID: 989
Karl, H. (2003). An overview of energy-efficiency techniques for mobile communication systems. Report of AG Mobikom WG7.
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2002 | Journal Article | LibreCat-ID: 1014
Ngo-Quynh, T., Karl, H., Wolisz, A., & Rebensburg, K. (2002). New scheduling algorithm for providing proportional jitter in differentiated services network. Proceedings of IST Mobile Communication and Wireless Telecommunications Summit, Thessaloniki, Greece.
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1998 | Journal Article | LibreCat-ID: 876
Karl, H. (1998). Bridging the gap between distributed shared memory and message passing. Concurrency - Practice and Experience, (11–13), 887--900. https://doi.org/10.1002/(SICI)1096-9128(199809/11)10:11/13<887::AID-CPE416>3.0.CO;2-0
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1998 | Journal Article | LibreCat-ID: 877
Baratloo, A., Karaul, M., Karl, H., & M. Kedem, Z. (1998). An infrastructure for network computing with Java applets. Concurrency -- Practice and Experience, (11–13), 1029--1041. https://doi.org/10.1002/(SICI)1096-9128(199809/11)10:11/13<1029::AID-CPE412>3.0.CO;2-U
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1998 | Journal Article | LibreCat-ID: 878
Karl, H., Werner, M., & Küttner, L. (1998). Experimental investigation of message latencies in the Totem protocol in the Presence of faults. IEEE Proceedings -- Software, (6), 219--227. https://doi.org/10.1049/ip-sen:19982443
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1997 | Journal Article | LibreCat-ID: 1445
Baratloo, A., Karaul, M., Karl, H., & Kedem, Z. M. (1997). KnittingFactory: An Infrastructure for Distributed Web Applications. Technical Report.
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