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Foto: Judith Kraft Bildinformationen anzeigen

Foto: Judith Kraft


S. Dräxler, H. Karl: Specification, Composition, and Placement of Network Services with Flexible Structures in International Journal of Network Management. 2017;e1963. doi:10.1002/nem.1963.


D. Parruca, J. Gross: Throughput Analysis of Proportional Fair Scheduling for Sparse and Ultra-Dense Interference-Limited OFDMA/LTE Network in IEEE Transactions on Wireless Communications, Vol. 15, No. 10, pp. 6857-6870, October 2016.
M. Keller, H. Karl.: Response-Time-Optimised Service Deployment: MILP Formulations of Piece-wise Linear Functions Approximation Bivariate Mixed-integer Function in IEEE Transactions on Network and Service Management, August 2016.

H. Karl, S. Dräxler, M. Peuster, A. Galis, M. Bredel, A. Ramos, J. Martrat, M. S. Siddiqui, S. v. Rossem, W. Tavernier, G. Xilouris:  DevOps for Network Function Virtualisation: An Architectural Approach in Transactions on Emerging Telecommunications Technologies, July 2016.

 M. Herlich, N. Bredenbals, H. Karl: Delayed (De-)Activation in Servers with a Sleep Mode in Sustainable Computing: Informatics and Systems, Vol. 10., pp. 48 - 55, June 2016. 


P. Wette, H. Karl: DCT2Gen: A traffic generator for data centers in Computer Communications, Dec. 2015.  pre-print arXiv


J. Künsemöller, H. Karl: A Game-Theoretic Approach to the Financial Benefits of Infrastructure-as-a-Service. In Future Generation Computer Systems  (2014) pp. 44-52.

F. Beister, M. Dräxler, J. Aelken, H. Karl: Power model design for ICT systems - A generic approach. In Computer Communications vol. 50, pp. 77-85, 2014.


T. Biermann, L. Scalia, C. Choi, W. Kellerer, H. Karl: How backhaul networks influence the feasibility of coordinated multipoint in cellular networks. In IEEE Communications Magazine (2013) pp. 168-176.

M. Dräxler, T. Biermann, H. Karl: Improving Cooperative Transmission Feasibility by Network Reconfiguration in Limited Backhaul Networks. In International Journal of Wireless Information Networks, vol. 20, no. 3, pp. 183-194, 2013.

C. Dannewitz, D. Kutscher, B. Ohlman, S. Farrell, B. Ahlgren, and H. Karl: "Network of Information (NetInf)-An Information-Centric Networking Architecture", Computer Communications, Volume 36 Issue 7,
Pages 721-735 , 2013.

R. Khan, H. Karl: "MAC Protocols for Cooperative Diversity in Wireless LANs and Wireless Sensor Networks", Communications Surveys & Tutorials, IEEE, Vol. 16, pp. 46 - 63, 2013.


T. Biermann, L. Scalia, C. Choi, H. Karl, W. Kellerer: "CoMP Clustering and Backhaul Limitations in Cooperative Cellular Mobile Access Networks", Pervasive and Mobile Computing, Volume 8, Issue 5, 2012, Pages 662–681.

A. Willig, D. Kipnis, H. Karl: "Segment-Based Packet Combining: How to Schedule a Dense Relayer Cluster?". In WirelessNetworks, Vol. 18(2), 2012, pp. 199-213. DOI: 10.1007/s11276-011-0395-y.


B. Ahlgren, P. A. Aranda, P. Chemouil, S. Oueslati, L. M. Correia, H. Karl, M. Söllner, A. Welin: "Content, Connectivity, and Cloud: ingredients for the network of the future". In IEEE Communications Magazine, 49(7), pp. 62-70, July 2011.

C. Dannewitz, T. Biermann, M. Dräxler, and H. Karl: "Complex Queries in P2P Networks with Resource-Constrained Devices", Journal of Advances in Information Technology (JAIT) - Special Issue on Advances in P2P Technology, vol. 02, no. 01, pp. 02-14, 2011.

D. Warneke, C. Dannewitz: "Load Balancing in P2P Networks: Using Statistics to Fight Data and Execution Skew", Journal of Advances in Information Technology (JAIT) - Special Issue on Advances in P2P Technology, vol. 02, no. 01, pp. 40-49, 2011.


H. S. Lichte, S. Valentin, and H. Karl: “Automated development of cooperative MAC protocols: A compiler-assisted approach,” Mobile Networks and Applicat., vol. 15, no. 6, 2010, pp. 769-785.

H. S. Lichte, S. Valentin, and H. Karl, "Expected interference in wireless networks with geometric path loss -- A closed-form approximation", IEEE Communications Letters,(Volume:14. Issue 2), pages 130 - 312, 2010.

S. Valentin, H. Karl: "Cooperative feedback to improve capacity and error rate in multiuser diversity systems - An OFDM case study". In European Transactions on Telecommunications, Special Issue on European Wireless, vol. 21, no. 8, pp. 714-724, 2010.


T. Biermann, M. Dräxler, H. Karl: "Flow Synchronization for Network Coding", in Journal of Communications, Vol. 4, No. 11, pp. 873-884, Dec. 2009.

S. Valentin, H. S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal, A. Agustin: "Cooperative wireless networking beyond store-and-forward: Perspectives in PHY and MAC design", Wireless Personal Communications, Vol. 48, No. 1, pp. 49-68, Jan. 2009.


S. Valentin, H. S. Lichte, H. Karl, S. Simoens, G. Vivier, J. Vidal, A. Agustin: "Implementing cooperative wireless networks -- Towards feasibility and deployment," in Cognitive Wireless Networks: Concepts, Methodologies and Visions, F. H. P. Fitzek and M. D. Katz (Eds.), Springer, Oct. 2007.


E. Carlson, C. Prehofer, C. Bettstetter, H. Karl, A. Wolisz: "A Distributed End-to-End Reservation Protocol for IEEE 802.11-based Wireless Mesh Networks", IEEE J. on Selected Areas in Communications (JSAC),  vol. 24, no. 11, pp. 2018-2027, Nov. 2006.

J. Gross, H. Geerdes, H. Karl, A. Wolisz: "Performance Analysis of Dynamic OFDMA Systems with Inband Signaling", IEEE J. on Selected Areas in Communications (JSAC), pp. 427-436, March 2006.


M. Savoric, H. Karl, M. Schläger, T. Poschwatta, A. Wolisz: "Analysis and performance evaluation of the EFCM common congestion controller for TCP connections", J. Computer Networks, vol. 49, no.2, pp. 269--294, Oct. 2005.

A. Willig, H. Karl: "Data Transport Reliability in Wireless Sensor Networks - A Survey of Issues and Solutions", Praxis der Informationsverarbeitung und Kommunikation, vol. 28, pp. 86-92, April 2005.

A. Festag, H. Karl, A. Wolisz: "Investigation of Multicast-Based Mobility Support in All-IP Cellular Networks", J. for Wireless Communication and Mobile Computing, 2005.

C. Hoene, H. Karl, A. Wolisz: "A Perceptual Quality Model Intended Adaptive VoIP Applications", Special issue Performance Evaluation of Wireless Networks and Communications of the Computer Communications Journal, Elsevier, May 2005.

J. Gross, S. Valentin, H. Karl, and A. Wolisz, "A study of impact of inband signaling and realistic channel knowledge for an example dynamic OFDM-FDMA system", European Transactions on Telecommunications, 2005.


J.-P. Ebert, D.Hollos, H. Karl, M.Löbbers: "Does Multi-Hop Communication Reduce Electromagnetic Exposure?", THE COMPUTER JOURNAL, September 2004.

M.Kubisch, H.Karl, A.Wolisz: "A MAC Protocol for Wireless Sensor Networks with Multiple Selectable, Fixed-Orientation Antennas", Frequenz, Zeitschrift für Schwingungs- und  Schwachstromtechnik, March 2004.

 N. Niebert, A. Schieder, H. Abramowicz, , G. Malmgren, J. Sachs, U. Horn, C. Prehofer, H. Karl: "Ambient Networks -- An Architecture for Communication Networks Beyond 3G", IEEE Wireless Communications (Special Issue on 4G Mobile Communications -- Towards Open Wireless Architecture), 2004.

J. Gross, J. Klaue, H. Karl, and A. Wolisz, "Cross-Layer Optimization of OFDM Transmission Systems for MPEG-4 Video Streaming", Computer Communications, vol. 27, pp. 1044-1055, 2004.

2003 and earlier

W. Zirwas, J. Habetha, H. Karl: "Ziel-orientierter Entwurf von Multi-hop Medienzugriffsprotokollen", Praxis der Informationsverarbeitung und Kommunikation, vol. 26, no. 4, pp. 184-189, 2003.

M. Savoric, H. Karl, A. Wolisz: "The TCP Control Block Interdependence in Fixed Networks --- New Performance Results", Computer Communications Magazine, vol. 26, no. 4, pp. 367-376, March 2003.

H. Karl, M. Werner, L. Küttner: "An Experimental Investigation of Message Latencies in the Totem Protocol in the Presence of Faults", IEEE Software, vol. 145, no. 6, pp. 219-227, December 1998.

A. Baratloo, M. Karaul, H. Karl, Z. Kedem: "KnittingFactory: An Infrastructure for Distributed Web Applications", Concurrency: Practice and Experience, vol. 10, no. 11-13, pp. 1029-1041, 1998.

H. Karl, "Bridging the Gap between Distributed Shared Memory and Message Passing", Concurrency: Practice and Experience, vol. 10, no. 11-13, pp. 887-900, 1998.

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