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60 Publications


2022 | Journal Article | LibreCat-ID: 32854
Practical Network Conditions for the Convergence of Distributed Optimization
A. Redder, A. Ramaswamy, H. Karl, IFAC-PapersOnLine 55 (2022) 133–138.
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2021 | Journal Article | LibreCat-ID: 21808 | OA
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).
LibreCat | Files available | DOI
 

2020 | Journal Article | LibreCat-ID: 16278
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).
LibreCat | DOI
 

2020 | Journal Article | LibreCat-ID: 16280
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.
LibreCat | DOI
 

2020 | Journal Article | LibreCat-ID: 13770
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.
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2019 | Journal Article | LibreCat-ID: 8113 | OA
Joint testing and profiling of microservice-based network services using TTCN-3
M. Peuster, C. Dröge, C. Boos, H. Karl, ICT Express (2019).
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2019 | Journal Article | LibreCat-ID: 8795 | OA
A flow handover protocol to support state migration in softwarized networks
M. Peuster, H. Küttner, H. Karl, International Journal of Network Management (2019).
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2019 | Journal Article | LibreCat-ID: 9823
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.
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2019 | Journal Article | LibreCat-ID: 9824 | OA
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.
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2019 | Journal Article | LibreCat-ID: 15741
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).
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2019 | Journal Article | LibreCat-ID: 10325 | OA
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).
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2018 | Journal Article | LibreCat-ID: 3152 | OA
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).
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2017 | Journal Article | LibreCat-ID: 58 | OA
Specification, Composition, and Placement of Network Services with Flexible Structures
S. Dräxler, H. Karl, International Journal of Network Management (2017) 1--16.
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2017 | Journal Article | LibreCat-ID: 64
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.
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2016 | Journal Article | LibreCat-ID: 714 | OA
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.
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2016 | Journal Article | LibreCat-ID: 726
DCT²Gen: A traffic generator for data centers
P. Wette, H. Karl, Computer Communications (2016) 45--58.
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2016 | Journal Article | LibreCat-ID: 1373
Delayed (de-)activation in servers with a sleep mode
M. Herlich, N. Bredenbals, H. Karl, Sustainable Computing: Informatics and Systems 10 (2016) 48–55.
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2014 | Journal Article | LibreCat-ID: 467
A Game-Theoretic Approach to the Financial Benefits of Infrastructure-as-a-Service
J. Künsemöller, H. Karl, Future Generation Computer Systems (2014) 44--52.
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2014 | Journal Article | LibreCat-ID: 753
Power model design for ICT systems -- A generic approach
F. Beister, M. Dräxler, J. Aelken, H. Karl, Computer Communications (2014) 77--85.
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2014 | Journal Article | LibreCat-ID: 754
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.
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2014 | Journal Article | LibreCat-ID: 1375
Power model design for ICT systems – A generic approach
F. Beister, M. Dräxler, J. Aelken, H. Karl, Computer Communications 50 (2014) 77–85.
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2013 | Journal Article | LibreCat-ID: 770
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.
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2013 | Journal Article | LibreCat-ID: 771
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.
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2013 | Journal Article | LibreCat-ID: 769
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).
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2012 | Journal Article | LibreCat-ID: 782
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.
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2012 | Journal Article | LibreCat-ID: 783
Segment-based packet combining: how to schedule a dense relayer cluster?
A. Willig, H. Karl, D. Kipnis, Wireless Networks (2012) 199--213.
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2011 | Journal Article | LibreCat-ID: 793
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.
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2011 | Journal Article | LibreCat-ID: 794
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.
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2011 | Journal Article | LibreCat-ID: 1615
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).
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2011 | Journal Article | LibreCat-ID: 1376
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).
LibreCat | DOI
 

2010 | Journal Article | LibreCat-ID: 1831
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.
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2010 | Journal Article | LibreCat-ID: 805
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.
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2010 | Journal Article | LibreCat-ID: 806
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.
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2010 | Journal Article | LibreCat-ID: 807
Automated Development of Cooperative MAC Protocols - A Compiler-Assisted Approach
H. Simon Lichte, S. Valentin, H. Karl, Mobile Networks and Applications (2010) 769--785.
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2009 | Journal Article | LibreCat-ID: 814
Flow Synchronization for Network Coding
T. Biermann, M. Dräxler, H. Karl, Journal of Communications (2009) 873--884.
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2009 | Journal Article | LibreCat-ID: 815
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.
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2007 | Journal Article | LibreCat-ID: 830
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.
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2007 | Journal Article | LibreCat-ID: 1018
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.
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2006 | Journal Article | LibreCat-ID: 837
A perceptual quality model intended for adaptive VoIP applications
C. Hoene, H. Karl, A. Wolisz, Int. J. Communication Systems (2006) 299--316.
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2006 | Journal Article | LibreCat-ID: 838
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.
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2006 | Journal Article | LibreCat-ID: 839
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.
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2005 | Journal Article | LibreCat-ID: 842
Does Multi-Hop Communication Reduce Electromagnetic Exposure?
J.-P. Ebert, D. Hollos, H. Karl, M. Löbbers, Comput. J. (2005) 72--83.
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2005 | Journal Article | LibreCat-ID: 843
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.
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2005 | Journal Article | LibreCat-ID: 844
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.
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2005 | Journal Article | LibreCat-ID: 845
Drahtlose Sensornetze
H. Karl, T. Lentsch, H. Ritter, Praxis Der Informationsverarbeitung Und Kommunikation (2005) 66--67.
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2005 | Journal Article | LibreCat-ID: 846
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.
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2005 | Journal Article | LibreCat-ID: 1378
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.
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2004 | Journal Article | LibreCat-ID: 850
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.
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2004 | Journal Article | LibreCat-ID: 851
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.
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2004 | Journal Article | LibreCat-ID: 993
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).
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2004 | Journal Article | LibreCat-ID: 998
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).
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2004 | Journal Article | LibreCat-ID: 1017
A MAC protocol for wireless sensor networks with multiple selectable, fixed-orientation antennas
M. Kubisch, H. Karl, A. Wolisz, Frequenz (2004) 92--96.
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2003 | Journal Article | LibreCat-ID: 860
The TCP control block interdependence in fixed networks - new performance results
M. Savoric, H. Karl, A. Wolisz, Computer Communications (2003) 366--375.
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2003 | Journal Article | LibreCat-ID: 861
Ziel-orientierter Entwurf von Multi-hop Medienzugriffsprotokollen
W. Zirwas, J. Habetha, H. Karl, Praxis Der Informationsverarbeitung Und Kommunikation (2003) 184--189.
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2003 | Journal Article | LibreCat-ID: 989
An overview of energy-efficiency techniques for mobile communication systems
H. Karl, Report of AG Mobikom WG7 (2003).
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2002 | Journal Article | LibreCat-ID: 1014
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).
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1998 | Journal Article | LibreCat-ID: 876
Bridging the gap between distributed shared memory and message passing
H. Karl, Concurrency - Practice and Experience (1998) 887--900.
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1998 | Journal Article | LibreCat-ID: 877
An infrastructure for network computing with Java applets
A. Baratloo, M. Karaul, H. Karl, Z. M. Kedem, Concurrency -- Practice and Experience (1998) 1029--1041.
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1998 | Journal Article | LibreCat-ID: 878
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.
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1997 | Journal Article | LibreCat-ID: 1445
KnittingFactory: An Infrastructure for Distributed Web Applications
A. Baratloo, M. Karaul, H. Karl, Z.M. Kedem, Technical Report (1997).
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