Journal Papers
Practical Network Conditions for the Convergence of Distributed Optimization
A. Redder, A. Ramaswamy, H. Karl, IFAC-PapersOnLine 55 (2022) 133–138.
Self-Learning Multi-Objective Service Coordination Using Deep Reinforcement Learning
S.B. Schneider, R. Khalili, A. Manzoor, H. Qarawlus, R. Schellenberg, H. Karl, A. Hecker, Transactions on Network and Service Management (2021).
A UAV-based moving 5G RAN for massive connectivity of mobile users and IoT devices
N. Nomikos, E.T. Michailidis, P. Trakadas, D. Vouyioukas, H. Karl, J. Martrat, T. Zahariadis, K. Papadopoulos, S. Voliotis, Vehicular Communications (2020).
Multi-Armed-Bandit-Based Spectrum Scheduling Algorithms in Wireless Networks: A Survey
F. Li, D. Yu, H. Yang, J. Yu, H. Karl, X. Cheng, IEEE Wireless Communications (2020) 24–30.
A Case for a New IT Ecosystem: On-The-Fly Computing
H. Karl, D. Kundisch, F. Meyer auf der Heide, H. Wehrheim, Business & Information Systems Engineering 62 (2020) 467–481.
Joint testing and profiling of microservice-based network services using TTCN-3
M. Peuster, C. Dröge, C. Boos, H. Karl, ICT Express (2019).
A flow handover protocol to support state migration in softwarized networks
M. Peuster, H. Küttner, H. Karl, International Journal of Network Management (2019).
Empowering Network Service Developers: Enhanced NFV DevOps and Programmable MANO
T. Soenen, W. Tavernier, M. Peuster, F. Vicens, G. Xilouris, S. Kolometsos, M.-A. Kourtis, D. Colle, IEEE Communications Magazine (2019) 89–95.
Introducing Automated Verification and Validation for Virtualized Network Functions and Services
M. Peuster, S.B. Schneider, M. Zhao, G. Xilouris, P. Trakadas, F. Vicens, W. Tavernier, T. Soenen, R. Vilalta, G. Andreou, D. Kyriazis, H. Karl, IEEE Communications Magazine (2019) 96–102.
Deep reinforcement learning for wireless sensor scheduling in cyber–physical systems
A.S. Leong, A. Ramaswamy, D.E. Quevedo, H. Karl, L. Shi, Automatica (2019).
Automated testing of NFV orchestrators against carrier-grade multi-PoP scenarios using emulation-based smoke testing
M. Peuster, M. Marchetti, G. García de Blas, H. Karl, EURASIP Journal on Wireless Communications and Networking (2019).
JASPER: Joint Optimization of Scaling, Placement, and Routing of Virtual Network Services
S. Dräxler, H. Karl, Z.A. Mann, IEEE Transactions on Network and Service Management (2018).
Specification, Composition, and Placement of Network Services with Flexible Structures
S. Dräxler, H. Karl, International Journal of Network Management (2017) 1--16.
Response-Time-Optimised Service Deployment: MILP Formulations of Piece-wise Linear Functions Approximating Non-linear Bivariate Mixed-integer Functions
M. Keller, H. Karl, IEEE Transactions on Network and Service Management (2017) 121--135.
DevOps for network function virtualisation: an architectural approach
H. Karl, S. Dräxler, M. Peuster, A. Galis, M. Bredel, A. Ramos, J. Martrat, M.S. Siddiqui, S. van Rossem, W. Tavernier, G. Xilouris, Transactions on Emerging Telecommunications Technologies 27 (2016) 1206–1215.
DCT²Gen: A traffic generator for data centers
P. Wette, H. Karl, Computer Communications (2016) 45--58.
Delayed (de-)activation in servers with a sleep mode
M. Herlich, N. Bredenbals, H. Karl, Sustainable Computing: Informatics and Systems 10 (2016) 48–55.
A Game-Theoretic Approach to the Financial Benefits of Infrastructure-as-a-Service
J. Künsemöller, H. Karl, Future Generation Computer Systems (2014) 44--52.
Power model design for ICT systems -- A generic approach
F. Beister, M. Dräxler, J. Aelken, H. Karl, Computer Communications (2014) 77--85.
MAC Protocols for Cooperative Diversity in Wireless LANs and Wireless Sensor Networks
R. Azeem M. Khan, H. Karl, IEEE Communications Surveys and Tutorials (2014) 46--63.
Power model design for ICT systems – A generic approach
F. Beister, M. Dräxler, J. Aelken, H. Karl, Computer Communications 50 (2014) 77–85.
Network of Information (NetInf) - An information-centric networking architecture
C. Dannewitz, D. Kutscher, B. Ohlman, S. Farrell, B. Ahlgren, H. Karl, Computer Communications (2013) 721--735.
Improving Cooperative Transmission Feasibility by Network Reconfiguration in Limited Backhaul Networks
M. Dräxler, T. Biermann, H. Karl, International Journal of Wireless Information Networks (2013) 183--194.
How backhaul networks influence the feasibility of coordinated multipoint in cellular networks
T. Biermann, L. Scalia, C. Choi, W. Kellerer, H. Karl, {IEEE} Communications Magazine (2013).
CoMP clustering and backhaul limitations in cooperative cellular mobile access networks
T. Biermann, L. Scalia, C. Choi, H. Karl, W. Kellerer, Pervasive and Mobile Computing (2012) 662--681.
Segment-based packet combining: how to schedule a dense relayer cluster?
A. Willig, H. Karl, D. Kipnis, Wireless Networks (2012) 199--213.
Content, connectivity, and cloud: ingredients for the network of the future
B. Ahlgren, P. A. Aranda-Gutierrez, P. Chemouil, S. Oueslati, L. M. Correia, H. Karl, M. Söllner, A. Welin, IEEE Communications Magazine (2011) 62--70.
Research challenges towards the Future Internet
M. Conti, S. Chong, S. Fdida, W. Jia, H. Karl, Y.-}Dar Lin, P. M{\, M. Maier, R. Molva, S. Uhlig, M. Zukerman, Computer Communications (2011) 2115--2134.
Load Balancing in P2P Networks: Using Statistics to Fight Data and Execution Skew
D. Warneke, C. Dannewitz, Journal of Advances in Information Technology 2 (2011).
Complex Queries in P2P Networks with Resource-Constrained Devices
C. Dannewitz, T. Biermann, M. Dräxler, H. Karl, Journal of Advances in Information Technology 2 (2011).
Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study
S. Valentin, H. Karl, European Transactions on Telecommunications 21 (2010) 714–724.
Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study
S. Valentin, H. Karl, European Transactions on Telecommunications (2010) 714--724.
Expected interference in wireless networks with geometric path loss: a closed-form approximation
H. S. Lichte, S. Valentin, H. Karl, IEEE Communications Letters (2010) 130--132.
Automated Development of Cooperative MAC Protocols - A Compiler-Assisted Approach
H. Simon Lichte, S. Valentin, H. Karl, Mobile Networks and Applications (2010) 769--785.
Flow Synchronization for Network Coding
T. Biermann, M. Dräxler, H. Karl, Journal of Communications (2009) 873--884.
Cooperative Wireless Networking Beyond Store-and-Forward
S. Valentin, H. S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal, A. Agustin, Wireless Personal Communications (2009) 49--68.
Investigation of multicast-based mobility support in all-IP cellular networks
A. Festag, H. Karl, A. Wolisz, Wireless Communications and Mobile Computing (2007) 319--339.
Implementing cooperative wireless networks
S. Valentin, H.S. Lichte, H. Karl, S. Simoens, G. Vivier, J. Vidal, A. Agustin, Cognitive Wireless Networks (2007) 155--178.
A perceptual quality model intended for adaptive VoIP applications
C. Hoene, H. Karl, A. Wolisz, Int. J. Communication Systems (2006) 299--316.
Performance analysis of dynamic OFDMA systems with inband signaling
J. Gross, H.-}Florian Geerdes, H. Karl, A. Wolisz, IEEE Journal on Selected Areas in Communications (2006) 427--436.
A Distributed End-to-End Reservation Protocol for IEEE 802.11-Based Wireless Mesh Networks
E. Carlson, C. Prehofer, C. Bettstetter, H. Karl, A. Wolisz, IEEE Journal on Selected Areas in Communications (2006) 2018--2027.
Does Multi-Hop Communication Reduce Electromagnetic Exposure?
J.-P. Ebert, D. Hollos, H. Karl, M. Löbbers, Comput. J. (2005) 72--83.
Analysis and performance evaluation of the EFCM common congestion controller for TCP connections
M. Savoric, H. Karl, M. Schläger, T. Poschwatta, A. Wolisz, Computer Networks (2005) 269--294.
A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system
J. Gross, S. Valentin, H. Karl, A. Wolisz, European Transactions on Telecommunications (2005) 37--49.
Drahtlose Sensornetze
H. Karl, T. Lentsch, H. Ritter, Praxis Der Informationsverarbeitung Und Kommunikation (2005) 66--67.
Data Transport Reliability in Wireless Sensor Networks. A Survey of Issues and Solutions
A. Willig, H. Karl, Praxis Der Informationsverarbeitung Und Kommunikation (2005) 86--92.
A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system
J. Gross, S. Valentin, H. Karl, A. Wolisz, European Transactions on Telecommunications 16 (2005) 37–49.
Cross-layer optimization of OFDM transmission systems for MPEG-4 video streaming
J. Gross, J. Klaue, H. Karl, A. Wolisz, Computer Communications (2004) 1044--1055.
Ambient networks: An architecture for communication networks beyond 3G
N. Niebert, A. Schieder, H. Abramowicz, G. Malmgren, J. Sachs, U. Horn, C. Prehofer, H. Karl, IEEE Wireless Communications (2004) 14--22.
A hybrid approach for location-based service discovery in vehicular ad hoc networks
N. Klimin, W. Enkelmann, H. Karl, A. Wolisz, Proc. of WIT (2004).
Capacity increase of multi-hop cellular wlans exploiting data rate adaptation and frequency recycling
S. Mengesha, H. Karl, A. Wolisz, Proc. of MedHocNet 2004 (2004).
A MAC protocol for wireless sensor networks with multiple selectable, fixed-orientation antennas
M. Kubisch, H. Karl, A. Wolisz, Frequenz (2004) 92--96.
The TCP control block interdependence in fixed networks - new performance results
M. Savoric, H. Karl, A. Wolisz, Computer Communications (2003) 366--375.
Ziel-orientierter Entwurf von Multi-hop Medienzugriffsprotokollen
W. Zirwas, J. Habetha, H. Karl, Praxis Der Informationsverarbeitung Und Kommunikation (2003) 184--189.
An overview of energy-efficiency techniques for mobile communication systems
H. Karl, Report of AG Mobikom WG7 (2003).
New scheduling algorithm for providing proportional jitter in differentiated services network
T. Ngo-Quynh, H. Karl, A. Wolisz, K. Rebensburg, Proceedings of IST Mobile Communication and Wireless Telecommunications Summit, Thessaloniki, Greece (2002).
Bridging the gap between distributed shared memory and message passing
H. Karl, Concurrency - Practice and Experience (1998) 887--900.
An infrastructure for network computing with Java applets
A. Baratloo, M. Karaul, H. Karl, Z. M. Kedem, Concurrency -- Practice and Experience (1998) 1029--1041.
Experimental investigation of message latencies in the Totem protocol in the Presence of faults
H. Karl, M. Werner, L. Küttner, IEEE Proceedings -- Software (1998) 219--227.
KnittingFactory: An Infrastructure for Distributed Web Applications
Show all publications
A. Baratloo, M. Karaul, H. Karl, Z.M. Kedem, Technical Report (1997).