312 Publications

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[312]
2008 | Conference Paper | LibreCat-ID: 1834
Mobile Cooperative WLANs - MAC and Transceiver Design, Prototyping, and Field Measurements
S. Valentin, H.S. Lichte, D. Warneke, T. Biermann, R. Funke, H. Karl, in: 2008 IEEE 68th Vehicular Technology Conference, IEEE, 2008.
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[311]
2008 | Conference Paper | LibreCat-ID: 1839
Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance
S. Valentin, T. Freitag, H. Karl, in: 2008 IEEE International Conference on Communications, IEEE, 2008.
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[310]
2008 | Book Chapter | LibreCat-ID: 1841
Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension
D.H. Woldegebreal, H. Karl, in: Lecture Notes in Computer Science, Springer Berlin Heidelberg, Berlin, Heidelberg, 2008, pp. 141–155.
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[309]
2008 | Conference Paper | LibreCat-ID: 822
Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension
D. H. Woldegebreal, H. Karl, in: Wireless Sensor Networks, 5th European Conference, EWSN 2008, Bologna, Italy, January 30-February 1, 2008, Proceedings, 2008, pp. 141--155.
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[308]
2008 | Conference Paper | LibreCat-ID: 823
Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance
S. Valentin, T. Freitag, H. Karl, in: Proceedings of IEEE International Conference on Communications, ICC 2008, Beijing, China, 19-23 May 2008, 2008, pp. 3328--3334.
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[307]
2008 | Conference Paper | LibreCat-ID: 824
Design and Evaluation of a Routing-Informed Cooperative MAC Protocol for Ad Hoc Networks
H. S. Lichte, S. Valentin, H. Karl, I. Aad, L. Loyola, J. Widmer, in: INFOCOM 2008. 27th IEEE International Conference on Computer Communications, Joint Conference of the IEEE Computer and Communications Societies, 13-18 April 2008, Phoenix, AZ, {USA}, 2008, pp. 1858--1866.
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[306]
2008 | Conference Paper | LibreCat-ID: 825
Opportunistic relaying vs. selective cooperation: analyzing the occurrence-conditioned outage capacity
S. Valentin, H. S. Lichte, H. Karl, I. Aad, L. Loyola, J. Widmer, in: Proceedings of the 11th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2008, Vancouver, British Columbia, Canada, October 27-31, 2008, 2008, pp. 193--202.
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[305]
2008 | Conference Paper | LibreCat-ID: 826
Decoding-based channel estimation for selective cooperation diversity protocols
S. Valentin, T. Volkhausen, F. Atay Onat, H. Yanikomeroglu, H. Karl, in: Proceedings of the IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008, 15-18 September 2008, Cannes, French Riviera, France, 2008, pp. 1--6.
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[304]
2008 | Conference Paper | LibreCat-ID: 827
Mobile Cooperative WLANs - MAC and Transceiver Design, Prototyping, and Field Measurements
S. Valentin, H. S. Lichte, D. Warneke, T. Biermann, R. Funke, H. Karl, in: Proceedings of the 68th IEEE Vehicular Technology Conference, VTC Fall 2008, 21-24 September 2008, Calgary, Alberta, Canada, 2008, pp. 1--5.
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[303]
2008 | Conference Paper | LibreCat-ID: 828
Incremental Network Coding in Cooperative Transmission Wireless Networks
D. H. Woldegebreal, S. Valentin, H. Karl, in: Proceedings of the 68th IEEE Vehicular Technology Conference, VTC Fall 2008, 21-24 September 2008, Calgary, Alberta, Canada, 2008, pp. 1--5.
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[302]
2008 | Conference Paper | LibreCat-ID: 1003
Random network coding in wireless sensor networks: Energy efficiency via cross-layer approach
D. Platz, D.H. Woldegebreal, H. Karl, in: Spread Spectrum Techniques and Applications, 2008 IEEE 10th International Symposium On, 2008, pp. 654--660.
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[301]
2008 | Conference Paper | LibreCat-ID: 1007
Enabling partial forwarding by decoding-based one and two-stage selective cooperation
S. Valentin, T. Volkhausen, F.A. Onat, H. Yanikomeroglu, H. Karl, in: Communications Workshops, 2008. ICC Workshops’ 08. IEEE International Conference On, 2008, pp. 129--133.
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[300]
2007 | Conference Paper | LibreCat-ID: 1840
Multiple-Access Relay Channel with Network Coding and Non-Ideal Source-Relay Channels
D.H. Woldegebreal, H. Karl, in: 2007 4th International Symposium on Wireless Communication Systems, IEEE, 2007.
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[299]
2007 | Conference Paper | LibreCat-ID: 1842
Optimizing sleeping intervals in preamble sampling MAC for WSNs
H. Karl, in: Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference, Bern / Switzerland, 2007.
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[298]
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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[297]
2007 | Conference Paper | LibreCat-ID: 831
WASP - Wirelessly Accessible Sensor Populations: A Project Overview
P. van der Stok, H. Karl, F. De Ambroggi, J. Decotignie, F. Siegemund, K. Lokhorst, M. Hellenschmidt, in: Constructing Ambient Intelligence - AmI 2007 Workshops Darmstadt, Germany, November 7-10, 2007 Revised Papers, 2007, pp. 426--429.
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[296]
2007 | Conference Paper | LibreCat-ID: 832
Outage probability analysis of cooperative transmission protocols without and with network coding: inter-user channels based comparison
D. H. Woldegebreal, S. Valentin, H. Karl, in: Proceedings of the 10th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2007, Chania, Crete Island, Greece, October 22-26, 2007, 2007, pp. 36--44.
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[295]
2007 | Conference Paper | LibreCat-ID: 833
Traffic-Aware Asymmetric Cooperation Diversity for Media Streaming in Wireless Networks
S. Valentin, H. von Malm, H. Karl, in: Proceedings of the IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2007, 3-7 September 2007, Athens, Greece, 2007, pp. 1--6.
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[294]
2007 | Conference Paper | LibreCat-ID: 834
Integrating multiuser dynamic OFDMA into IEEE 802.11a and prototyping it on a real-time software-defined radio testbed
H. S. Lichte, S. Valentin, F. Eitzen, M. Stege, C. Unger, H. Karl, in: 3rd International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TridentCom 2007, Orlando, Florida, USA, May 21-23 2007, 2007, pp. 1--9.
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[293]
2007 | Conference Paper | LibreCat-ID: 835
Effect of User Mobility in Coded Cooperative Systems with Joint Partner and Cooperation Level Selection
S. Valentin, H. Karl, in: IEEE Wireless Communications and Networking Conference, WCNC 2007, Hong Kong, China, 11-15 March, 2007, 2007, pp. 896--901.
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[292]
2007 | Conference Paper | LibreCat-ID: 836
Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs
L. Marie Feeney, B. Cetin, D. Hollos, M. Kubisch, S. Mengesha, H. Karl, in: Wired/Wireless Internet Communications, 5th International Conference, WWIC 2007, Coimbra, Portugal, May 23-25, 2007, Proceedings, 2007, pp. 201--212.
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[291]
2007 | Conference Paper | LibreCat-ID: 1015 LibreCat
 
[290]
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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[289]
2006 | Report | LibreCat-ID: 2518
Evaluating the GNU Software Radio platform for wireless testbeds
S. Valentin, H. von Malm, H. Karl, Evaluating the GNU Software Radio Platform for Wireless Testbeds, 2006.
LibreCat | Files available
 
[288]
2006 | Conference Paper | LibreCat-ID: 2523
Cooperative wireless networking beyond store-and-forward: Perspectives for PHY and MAC design
S. Valentin, H.S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal, A. Agustin, I. Aad, in: 2006.
LibreCat | Files available | Download (ext.)
 
[287]
2006 | Conference Paper | LibreCat-ID: 2526
An IEEE 802.21-based Universal Information Service
C. Dannewitz, S. Berg, H. Karl, in: Proc. of the Wireless World Research Forum Meeting , 2006.
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[286]
2006 | Conference (Editor) | LibreCat-ID: 17417
Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems
F.-J. Rammig, W. Dangelmaier, H. Karl, B. Mertsching, F. Meyer auf der Heide, A. Trächtler, eds., Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems, Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2006.
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[285]
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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[284]
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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[283]
2006 | Conference Paper | LibreCat-ID: 840
Wireless Sensor Networks
F. Mattern, H. Karl, K. Römer, in: K. R{\"{o}}mer, H. Karl, F. Mattern (Eds.), Third European Workshop, {EWSN} 2006, Zurich, Switzerland, February 13-15, 2006, Proceedings, 2006.
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[282]
2005 | Conference Paper | LibreCat-ID: 1843
Channel-Adaptive Schedulers with State-of-the-Art Channel Predictors
A. Aguiar, A. Wolisz, H. Lederer, H. Karl, in: Proceedings of the 11th European Wireless Conference 2005, 2005.
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[281]
2005 | Book | LibreCat-ID: 841
Protocols and architectures for wireless sensor networks
H. Karl, A. Willig, Protocols and Architectures for Wireless Sensor Networks, 2005.
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[280]
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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[279]
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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[278]
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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[277]
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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[276]
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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[275]
2005 | Book Chapter | LibreCat-ID: 848
Ad Hoc Networks
H. Karl, in: The Industrial Information Technology Handbook, 2005, pp. 1--16.
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[274]
2005 | Conference Paper | LibreCat-ID: 1013
Adaptive scheduling for heterogeneous traffic flows in cellular wireless OFDM-FDMA systems
S. Valentin, J. Gross, H. Karl, A. Wolisz, in: 10th IFIP International Conference on Personal Wireless Communications/PWC’05, Comar, France, 2005, 2005.
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[273]
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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[272]
2004 | Conference Paper | LibreCat-ID: 2529
Consensus in WSN – Identifying critical protocol mechanisms
A. Köpke, H. Karl, A. Wolisz, in: GI / ITG Fachgespräche Drahtlose Sensornetzwerke, 2004.
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[271]
2004 | Conference Paper | LibreCat-ID: 1911
Channel Adaptive Techniques in the Presence of Channel Prediction Inaccuracy
A. Aguiar, H. Karl, A. Wolisz, in: Proceedings of European Wireless 2004, Barcelona / Spain , 2004.
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[270]
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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[269]
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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[268]
2004 | Conference Paper | LibreCat-ID: 852
Improving the Energy Efficiency of Directed Diffusion Using Passive Clustering
V. Handziski, A. Köpke, H. Karl, C. Frank, W. Drytkiewicz, in: Wireless Sensor Networks, First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings, 2004, pp. 172--187.
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[267]
2004 | Conference Paper | LibreCat-ID: 853
Research Challenges in Mobility and Moving Networks: An Ambient Networks View
V. Typpö, J. Eisl, J. Höller, R. Agüero, H. Karl, in: Broadband Satellite Comunication Systems and the Challenges of Mobility - IFIP TC6 Workshops on Broadband Satellite Communication Systems and Challenges of Mobility, World Computer Congress, August 22-27, 2004, Toulouse, France, 2004, pp. 145--155.
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[266]
2004 | Conference Paper | LibreCat-ID: 854
Consistency challenges of service discovery in mobile ad hoc networks
C. Frank, H. Karl, in: Proceedings of the 7th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2004, Venice, Italy, October 4-6, 2004, 2004, pp. 105--114.
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[265]
2004 | Conference Paper | LibreCat-ID: 855
A Geometric Derivation of the Probability of Finding a Relay in Multi-rate Networks
L. Marie Feeney, D. Hollos, M. Kubisch, S. Mengesha, H. Karl, in: NETWORKING 2004, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication, Third International IFIP-TC6 Networking Conference, Athens, Greece, May 9-14, 2004, Proceedings, 2004, pp. 1312--1317.
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[264]
2004 | Conference Paper | LibreCat-ID: 856
Regionalizing global optimization algorithms to improve the operation of large ad hoc networks
D. Hollos, H. Karl, A. Wolisz, in: 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004, 2004, pp. 819--824.
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[263]
2004 | Conference Paper | LibreCat-ID: 857
Queue-driven cut-through medium access in wireless ad hoc networks
D. Raguin, M. Kubisch, H. Karl, A. Wolisz, in: 2004 IEEE Wireless Communications and Networking Conference , WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004, 2004, pp. 1909--1914.
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[262]
2004 | Book Chapter | LibreCat-ID: 858
Data Transmission in Mobile Communication Systems
H. Karl, in: Location-Based Services, 2004, pp. 207--244.
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[261]
2004 | Conference (Editor) | LibreCat-ID: 859
Wireless Sensor Networks
H. Karl, A. Willig, A. Wolisz, eds., Wireless Sensor Networks, First European Workshop, {EWSN} 2004, Berlin, Germany, January 19-21, 2004, Proceedings, 2004.
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[260]
2004 | Conference Paper | LibreCat-ID: 988
Ambient Networks--Research for Communication Networks Beyond 3G
N. Niebert, H. Flinck, R. Hancock, H. Karl, C. Prehofer, in: 13th IST Mobile and Wireless Communications-Summit 2004, 2004.
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[259]
2004 | Conference Paper | LibreCat-ID: 992
Throughput study for a dynamic OFDM-FDMA system with inband signaling
J. Gross, I. Paoluzzi, H. Karl, A. Wolisz, in: Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, 2004, pp. 1787--1791.
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[258]
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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[257]
2004 | Conference Paper | LibreCat-ID: 997
Distributed allocation of time slots for real-time traffic in a wireless multi-hop network
E. Carlson, H. Karl, A. Wolisz, C. Prehofer, in: Proc. European Wireless, 2004.
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[256]
2004 | Journal Article | LibreCat-ID: 998 LibreCat
 
[255]
2004 | Conference Paper | LibreCat-ID: 1002
Distributed maintenance of resource reservation paths in multihop 802.11 networks
E. Carlson, C. Bettstetter, H. Karl, C. Prehofer, A. Wolisz, in: Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th, 2004, pp. 2994--2998.
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[254]
2004 | Conference Paper | LibreCat-ID: 1006
On the effect of inband signaling and realistic channel knowledge on dynamic OFDM-FDMA systems
J. Gross, H. Karl, A. Wolisz, in: European Wireless 2004, 2004.
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[253]
2004 | Journal Article | LibreCat-ID: 1017 LibreCat | Files available | DOI
 
[252]
2004 | Conference Paper | LibreCat-ID: 1019
Throughput optimization of dynamic OFDM-FDMA systems with inband signaling
J. Gross, H. Karl, A. Wolisz, in: 2nd International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks 2004 (WiOpt 2004), 2004.
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[251]
2003 | Report | LibreCat-ID: 2533
A common wireless sensor network architecture?
V. Handziski, A. Köpke, H. Karl, A. Wolisz, A Common Wireless Sensor Network Architecture?, Berlin, 2003.
LibreCat | Files available
 
[250]
2003 | Conference Paper | LibreCat-ID: 2535
A Mobility Frame work for OMNeT++
W. Drytkiewicz, S. Sroka, V. Handzisk, A. Köpke, H. Karl, in: Proc. of 3rd International OMNeT++ Workshop at Budapest University of Technology and Economics, 2003.
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[249]
2003 | Conference Paper | LibreCat-ID: 1913
Secure, QoS-Enabled Mobility Support for IP-based Networks
X. Fu, T. Chen, A. Festag, H. Karl, G. Schäfer, C. Fan, in: Proceedings IP Based Cellular Network Conference IPCN, Paris / France, Dezember , 2003.
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[248]
2003 | Conference Paper | LibreCat-ID: 1914
The Potential of Relaying in Cellular Networks
H.-F. Geerdes, H. Karl, in: Proceedings of INOC 2003, Evry/Paris, 2003.
LibreCat | Download (ext.)
 
[247]
2003 | Conference Paper | LibreCat-ID: 1917
Channel-aware Schedulers for VoIP and MPEG4 based on Channel Prediction
A. Aguiar, C. Hoene, J. Klaue, H. Karl, H. Miesmer, A. Wolisz, in: Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03), 2003.
LibreCat | Download (ext.)
 
[246]
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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[245]
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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[244]
2003 | Conference Paper | LibreCat-ID: 862
A Framework for Evaluating Effects of Channel Prediction Inaccuracy on the Performance of Channel Adaptive Techniques
A. Aguiar, H. Karl, A. Wolisz, H. Miesmer, in: Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, {USA}, 2003, pp. 3--9.
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[243]
2003 | Conference Paper | LibreCat-ID: 863
Comparison of Heuristic and Optimal Subcarrier Assignment Algorithms
J. Gross, H. Karl, F. H. P. Fitzek, A. Wolisz, in: Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, {USA}, 2003, pp. 249--255.
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[242]
2003 | Conference Paper | LibreCat-ID: 864
EYES} - Energy Efficient Sensor Networks
P. J. M. Havinga, S. Etalle, H. Karl, C. Petrioli, M. Zorzi, H. Kip, T. Lentsch, in: Personal Wireless Communications, IFIP-TC6 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings, 2003, pp. 198--201.
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[241]
2003 | Conference Paper | LibreCat-ID: 865
Are Classes of Nodes with Different Power Amplifiers Good for Wireless Multi-hop Networks?
M. Kubisch, H. Karl, A. Wolisz, in: Personal Wireless Communications, {IFIP-TC6} 8th International Conference, {PWC} 2003, Venice, Italy, September 23-25, 2003, Proceedings, 2003, pp. 841--846.
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[240]
2003 | Conference Paper | LibreCat-ID: 866
Chaotic Maps as Parsimonious Bit Error Models of Wireless Channels
A. Köpke, A. Willig, H. Karl, in: Proceedings IEEE INFOCOM 2003, The 22nd Annual Joint Conference of the IEEE Computer and Communications Societies, San Franciso, CA, USA, March 30 - April 3, 2003, 2003, pp. 513--523.
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[239]
2003 | Conference Paper | LibreCat-ID: 867
Performance Evaluation of a QoS-Aware Handover Mechanism
S. Sroka, H. Karl, in: Proceedings of the Eighth IEEE Symposium on Computers and Communications (ISCC 2003), 30 June - 3 July 2003, Kiris-Kemer, Turkey, 2003, pp. 117--124.
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[238]
2003 | Conference Paper | LibreCat-ID: 868
Applying ad-hoc relaying to improve capacity, energy efficiency, and immission in infrastructure-based WLANs
M. Kubisch, S. Mengesha, D. Hollos, H. Karl, A. Wolisz, in: Kommunikation in Verteilten Systemen KiVS, 13. Fachtagung Kommunikation in Verteilten Systemen. KiVS 2003, 25.-28. Februar 2003, Leipzig, Eine Veranstaltung Der Informationstechnischen Gesellschaft (ITG/VDE) Unter Beteiligung Der Gesellschaft Für Informatik (GI) Ausgerichtet von Der Universität Leipzig, 2003, pp. 195--206.
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[237]
2003 | Conference Paper | LibreCat-ID: 869
Classification and Evaluation of Multicast-Based Mobility Support in All-IP Cellular Networks
A. Festag, H. Karl, A. Wolisz, in: Kommunikation in Verteilten Systemen (KiVS), 13. Fachtagung Kommunikation in Verteilten Systemen. KiVS 2003, 25.-28. Februar 2003, Leipzig, Eine Veranstaltung Der Informationstechnischen Gesellschaft (ITG/VDE) Unter Beteiligung Der Gesellschaft Für Informatik (GI) Ausgerichtet von Der Universität Leipzig, 2003, pp. 233--244.
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[236]
2003 | Conference Paper | LibreCat-ID: 870
Distributed algorithms for transmission power control in wireless sensor networks
M. Kubisch, H. Karl, A. Wolisz, L. Charlie Zhong, J. M. Rabaey, in: 2003 IEEE Wireless Communications and Networking, WCNC 2003, New Orleans, LA, USA, 16-20 March, 2003, 2003, pp. 558--563.
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[235]
2003 | Conference Paper | LibreCat-ID: 987
A mobility framework for omnet++
W. Drytkiewicz, S. Sroka, V. Handziski, A. Köpke, H. Karl, in: 3rd International OMNeT++ Workshop, 2003.
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[234]
2003 | Journal Article | LibreCat-ID: 989 LibreCat
 
[233]
2003 | Conference Paper | LibreCat-ID: 991
Subcarrier allocation for variable bit rate video streams in wireless OFDM systems
J. Gross, J. Klaue, H. Karl, A. Wolisz, in: Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, 2003, pp. 2481--2485.
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[232]
2003 | Conference Paper | LibreCat-ID: 994
A data aggregation framework for wireless sensor networks
H. Karl, M. Löbbers, T. Nieberg, in: Proc. Dutch Technology Foundation ProRISC Workshop on Circuits, Systems and Signal Processing, 2003.
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[231]
2003 | Conference Paper | LibreCat-ID: 999
Semantic-aware link layer scheduling of mpeg-4 video streams in wireless systems
J. Klaue, J. Gross, H. Karl, A. Wolisz, in: 3rd Workshop of Applications and Services in Wireless Networks 2003 (ASWN 2003), 2003.
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[230]
2003 | Conference Paper | LibreCat-ID: 1008
Prototype implementation and performance evaluation of a QoS-conditionalized handoff scheme for mobile IPv6 networks
A. Neumann, X. Fu, H. Karl, in: Computer Communications, 2003. CCW 2003. Proceedings. 2003 IEEE 18th Annual Workshop On, 2003, pp. 24--29.
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[229]
2003 | Conference Paper | LibreCat-ID: 1024
Channel-Aware Schedulers For Voip And Mpeg4 For Wireless Communications
A.C.C. Aguiar, C. Hoene, J. Klaue, H. Karl, H. Miesmer, A. Wolisz, in: Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03), 2003.
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[228]
2002 | Report | LibreCat-ID: 2538
Relaying in Wireless Access Networks
H. Karl, S. Mengesha, D. Hollos, Relaying in Wireless Access Networks , Business Briefing: Wireless Technology 2002, London, 2002.
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[227]
2002 | Conference Paper | LibreCat-ID: 2541
Making sensor networks intelligent
A. Köpke, V. Handziski, H. Karl, in: Proc. 7th Wireless World Research Forum (WWRF), Eindhoven/Netherlands, 2002.
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[226]
2002 | Conference Paper | LibreCat-ID: 2544
Concepts for a QoS-enabled, TCP/IP-oriented Link Layer in Beyond 3G Networks
H. Miesmer, H. Sanneck, A. Aguier, H. Karl, in: Proc. of 6th Wireless World Forum, London / GB, 2002.
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[225]
2002 | Conference Paper | LibreCat-ID: 2548
A HiperLAN/2 simulation model in OMNeT++
D. Hollos, H. Karl, in: Proc. of 2nd Intl. OMNet Workshop, Berlin , 2002.
LibreCat | Files available
 
[224]
2002 | Conference Paper | LibreCat-ID: 1921
New Scheduling Algorithm for Providing Proportional Jitter in Differentiated Service Network
T. Ngo-Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Proc. IST Mobile & Wireless Telecommunications Summit 2002., 2002.
LibreCat
 
[223]
2002 | Conference Paper | LibreCat-ID: 871
QoS-Conditionalized Handoff for Mobile IPv6
X. Fu, H. Karl, C. Kappler, in: NETWORKING 2002, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; and Mobile and Wireless Communications, Second International IFIP-TC6 Networking Conference, Pisa, Italy, May 19-24, 2002, Proceedings, 2002, pp. 721--730.
LibreCat | DOI
 
[222]
2002 | Conference Paper | LibreCat-ID: 872
A protocol extension to HiperLAN/2 to support single-relay networks
D. Hollos, H. Karl, in: Mobile Ad-Hoc Netzwerke, 1. Deutscher Workshop Über Mobile Ad-Hoc Netzwerke WMAN 2002, 25.-26. März 2002 in Ulm, 2002, pp. 91--107.
LibreCat
 
[221]
2002 | Conference Paper | LibreCat-ID: 990
M-SCTP: Design and prototypical implementation of an end-to-end mobility concept
W. Xing, H. Karl, A. Wolisz, H. Müller, in: In Proc. 5th Intl. Workshop The Internet Challenge: Technology and Applications, 2002, p. 43.
LibreCat
 
[220]
2002 | Conference Paper | LibreCat-ID: 1001
Using only Proportional Jitter Scheduling at the boundary of a Differentiated Service Network: simple and efficient
T.N. Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Universal Multiservice Networks, 2002. ECUMN 2002. 2nd European Conference On, 2002, pp. 116--123.
LibreCat
 
[219]
2002 | Conference Paper | LibreCat-ID: 1009
Using akaroa2 with omnet++
S. Sroka, H. Karl, in: 2nd International OMNeT++ Workshop, Berlin, Germany, 2002.
LibreCat | Files available
 
[218]
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).
LibreCat
 
[217]
2002 | Conference Paper | LibreCat-ID: 1020
Effects of prediction inaccuracy on the performance of channelstate-aware link layer schedulers
A. Aguiar, H. Karl, A. Wolisz, in: Proc. of 1st Intl. Conf. on Mobile and Ubiquitous Multimedia, 2002, pp. 21--33.
LibreCat
 
[216]
2001 | Conference Paper | LibreCat-ID: 2552
Relaying in Wireless Access Networks – A Capacity and Energy-Efficiency Perspective
H. Karl, in: Proc. Wireless World Research Forum Kickoff Meeting (WWRF), München, 2001.
LibreCat | Files available
 
[215]
2001 | Conference Paper | LibreCat-ID: 2554
Relaying ñ bad for energy, good for capacity?
H. Karl, in: Eork-in-progress session of mobicom 2001, Rom/Italy, 2001.
LibreCat | Files available
 
[214]
2001 | Conference Paper | LibreCat-ID: 2556
IBMS 2 - Integriertes Bandbreiteneffizientes Mobiles Software-Radio System
H. Karl, T. Hentschel, in: Zukunftsperspektiven Der Mobilkommunikation, Symposium Bundesministerium Für Bildung Und Forschung, 2001.
LibreCat | Files available
 
[213]
2001 | Conference Paper | LibreCat-ID: 873
Improving Goodput by Relaying in Transmission-Power-Limited Wireless Systems
S. Mengesha, H. Karl, A. Wolisz, in: GI Jahrestagung (1), 2001, pp. 537--544.
LibreCat
 
[212]
2001 | Conference Paper | LibreCat-ID: 995
Analysing capacity improvements in wireless networks by relaying
H. Karl, S. Mengesha, in: Proc. of IEEE Intl. Conf. on Wireless LANs and Home Networks, 2001, pp. 339--348.
LibreCat
 
[211]
2001 | Conference Paper | LibreCat-ID: 996
Relative jitter packet scheduling for differentiated services
T. Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Proc. 9th IFIP Conf. Perf. Modeling and Eval. of ATM & IP Networks, 2001.
LibreCat
 
[210]
2001 | Conference Paper | LibreCat-ID: 1016
The influence of proportional jitter and delay on end to end delay in differentiated service network
T.N. Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Network Computing and Applications, 2001. NCA 2001. IEEE International Symposium On, 2001, pp. 354--357.
LibreCat
 
[209]
2000 | Conference Paper | LibreCat-ID: 1920
Predictable Network Computing using Message-driven Scheduling
H. Karl, A. Polze, M. Werner, in: Proc. the Workshop on Run-Time Systems for Parallel Programming, 2000.
LibreCat
 
[208]
1999 | Conference Paper | LibreCat-ID: 874
Towards Quality of Service for Parallel Computing: An Overview of the MILAN Project
H. Karl, in: High-Performance Computing and Networking, 7th International Conference, HPCN Europe 1999, Amsterdam, The Netherlands, April 12-14, 1999, Proceedings, 1999, pp. 841--850.
LibreCat | DOI
 
[207]
1999 | Conference Paper | LibreCat-ID: 875
Coscheduling through Synchronized Scheduling Servers -- A Prototype and Experiments
H. Karl, in: Parallel and Distributed Processing, 11 IPPS/SPDP’99 Workshops Held in Conjunction with the 13th International Parallel Processing Symposium and 10th Symposium on Parallel and Distributed Processing, San Juan, Puerto Rico, USA, April 12-16, 1999, Proceedings, 1999, pp. 1115--1129.
LibreCat | DOI
 
[206]
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.
LibreCat | DOI
 
[205]
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.
LibreCat | DOI
 
[204]
1998 | Conference Paper | LibreCat-ID: 879
An Experimental Investigation of Message Latencies in the Totem Protocol in the Presence of Faults
H. Karl, M. Werner, L. Kuttner, in: 24th EUROMICRO ’98 Conference, Engineering Systems and Software for the Next Decade, 25-27 August 1998, Vesteras, Sweden, 1998, pp. 10468--10475.
LibreCat | DOI
 
[203]
1998 | Conference Paper | LibreCat-ID: 1012
An optimal checkpointing interval for real-time systems
H. Karl, M. Werner, in: Proc. Intl. Conf. Parallel and Distributed Processing Techniques and Applications, 1998, pp. 604--612.
LibreCat
 
[202]
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).
LibreCat | Files available
 
[201]
1996 | Conference Paper | LibreCat-ID: 880
ReGTime - Rent Gigaflops someTimes
B. Dreier, A. Huber, H. Karl, T. Ungerer, M. Zahn, in: Trends in Distributed Systems: CORBA and Beyond, International Workshop TreDS ’96, Aachen, Germany, October 1-2, 1996, Proceedings, 1996, pp. 84--93.
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[312]
2008 | Conference Paper | LibreCat-ID: 1834
Mobile Cooperative WLANs - MAC and Transceiver Design, Prototyping, and Field Measurements
S. Valentin, H.S. Lichte, D. Warneke, T. Biermann, R. Funke, H. Karl, in: 2008 IEEE 68th Vehicular Technology Conference, IEEE, 2008.
LibreCat | DOI
 
[311]
2008 | Conference Paper | LibreCat-ID: 1839
Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance
S. Valentin, T. Freitag, H. Karl, in: 2008 IEEE International Conference on Communications, IEEE, 2008.
LibreCat | DOI
 
[310]
2008 | Book Chapter | LibreCat-ID: 1841
Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension
D.H. Woldegebreal, H. Karl, in: Lecture Notes in Computer Science, Springer Berlin Heidelberg, Berlin, Heidelberg, 2008, pp. 141–155.
LibreCat | DOI
 
[309]
2008 | Conference Paper | LibreCat-ID: 822
Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension
D. H. Woldegebreal, H. Karl, in: Wireless Sensor Networks, 5th European Conference, EWSN 2008, Bologna, Italy, January 30-February 1, 2008, Proceedings, 2008, pp. 141--155.
LibreCat | DOI
 
[308]
2008 | Conference Paper | LibreCat-ID: 823
Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance
S. Valentin, T. Freitag, H. Karl, in: Proceedings of IEEE International Conference on Communications, ICC 2008, Beijing, China, 19-23 May 2008, 2008, pp. 3328--3334.
LibreCat | DOI
 
[307]
2008 | Conference Paper | LibreCat-ID: 824
Design and Evaluation of a Routing-Informed Cooperative MAC Protocol for Ad Hoc Networks
H. S. Lichte, S. Valentin, H. Karl, I. Aad, L. Loyola, J. Widmer, in: INFOCOM 2008. 27th IEEE International Conference on Computer Communications, Joint Conference of the IEEE Computer and Communications Societies, 13-18 April 2008, Phoenix, AZ, {USA}, 2008, pp. 1858--1866.
LibreCat | DOI
 
[306]
2008 | Conference Paper | LibreCat-ID: 825
Opportunistic relaying vs. selective cooperation: analyzing the occurrence-conditioned outage capacity
S. Valentin, H. S. Lichte, H. Karl, I. Aad, L. Loyola, J. Widmer, in: Proceedings of the 11th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2008, Vancouver, British Columbia, Canada, October 27-31, 2008, 2008, pp. 193--202.
LibreCat | DOI
 
[305]
2008 | Conference Paper | LibreCat-ID: 826
Decoding-based channel estimation for selective cooperation diversity protocols
S. Valentin, T. Volkhausen, F. Atay Onat, H. Yanikomeroglu, H. Karl, in: Proceedings of the IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008, 15-18 September 2008, Cannes, French Riviera, France, 2008, pp. 1--6.
LibreCat | DOI
 
[304]
2008 | Conference Paper | LibreCat-ID: 827
Mobile Cooperative WLANs - MAC and Transceiver Design, Prototyping, and Field Measurements
S. Valentin, H. S. Lichte, D. Warneke, T. Biermann, R. Funke, H. Karl, in: Proceedings of the 68th IEEE Vehicular Technology Conference, VTC Fall 2008, 21-24 September 2008, Calgary, Alberta, Canada, 2008, pp. 1--5.
LibreCat | DOI
 
[303]
2008 | Conference Paper | LibreCat-ID: 828
Incremental Network Coding in Cooperative Transmission Wireless Networks
D. H. Woldegebreal, S. Valentin, H. Karl, in: Proceedings of the 68th IEEE Vehicular Technology Conference, VTC Fall 2008, 21-24 September 2008, Calgary, Alberta, Canada, 2008, pp. 1--5.
LibreCat | DOI
 
[302]
2008 | Conference Paper | LibreCat-ID: 1003
Random network coding in wireless sensor networks: Energy efficiency via cross-layer approach
D. Platz, D.H. Woldegebreal, H. Karl, in: Spread Spectrum Techniques and Applications, 2008 IEEE 10th International Symposium On, 2008, pp. 654--660.
LibreCat
 
[301]
2008 | Conference Paper | LibreCat-ID: 1007
Enabling partial forwarding by decoding-based one and two-stage selective cooperation
S. Valentin, T. Volkhausen, F.A. Onat, H. Yanikomeroglu, H. Karl, in: Communications Workshops, 2008. ICC Workshops’ 08. IEEE International Conference On, 2008, pp. 129--133.
LibreCat
 
[300]
2007 | Conference Paper | LibreCat-ID: 1840
Multiple-Access Relay Channel with Network Coding and Non-Ideal Source-Relay Channels
D.H. Woldegebreal, H. Karl, in: 2007 4th International Symposium on Wireless Communication Systems, IEEE, 2007.
LibreCat | DOI
 
[299]
2007 | Conference Paper | LibreCat-ID: 1842
Optimizing sleeping intervals in preamble sampling MAC for WSNs
H. Karl, in: Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference, Bern / Switzerland, 2007.
LibreCat
 
[298]
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.
LibreCat | DOI
 
[297]
2007 | Conference Paper | LibreCat-ID: 831
WASP - Wirelessly Accessible Sensor Populations: A Project Overview
P. van der Stok, H. Karl, F. De Ambroggi, J. Decotignie, F. Siegemund, K. Lokhorst, M. Hellenschmidt, in: Constructing Ambient Intelligence - AmI 2007 Workshops Darmstadt, Germany, November 7-10, 2007 Revised Papers, 2007, pp. 426--429.
LibreCat | DOI
 
[296]
2007 | Conference Paper | LibreCat-ID: 832
Outage probability analysis of cooperative transmission protocols without and with network coding: inter-user channels based comparison
D. H. Woldegebreal, S. Valentin, H. Karl, in: Proceedings of the 10th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2007, Chania, Crete Island, Greece, October 22-26, 2007, 2007, pp. 36--44.
LibreCat | DOI
 
[295]
2007 | Conference Paper | LibreCat-ID: 833
Traffic-Aware Asymmetric Cooperation Diversity for Media Streaming in Wireless Networks
S. Valentin, H. von Malm, H. Karl, in: Proceedings of the IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2007, 3-7 September 2007, Athens, Greece, 2007, pp. 1--6.
LibreCat | DOI
 
[294]
2007 | Conference Paper | LibreCat-ID: 834
Integrating multiuser dynamic OFDMA into IEEE 802.11a and prototyping it on a real-time software-defined radio testbed
H. S. Lichte, S. Valentin, F. Eitzen, M. Stege, C. Unger, H. Karl, in: 3rd International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TridentCom 2007, Orlando, Florida, USA, May 21-23 2007, 2007, pp. 1--9.
LibreCat | DOI
 
[293]
2007 | Conference Paper | LibreCat-ID: 835
Effect of User Mobility in Coded Cooperative Systems with Joint Partner and Cooperation Level Selection
S. Valentin, H. Karl, in: IEEE Wireless Communications and Networking Conference, WCNC 2007, Hong Kong, China, 11-15 March, 2007, 2007, pp. 896--901.
LibreCat | DOI
 
[292]
2007 | Conference Paper | LibreCat-ID: 836
Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs
L. Marie Feeney, B. Cetin, D. Hollos, M. Kubisch, S. Mengesha, H. Karl, in: Wired/Wireless Internet Communications, 5th International Conference, WWIC 2007, Coimbra, Portugal, May 23-25, 2007, Proceedings, 2007, pp. 201--212.
LibreCat | DOI
 
[291]
2007 | Conference Paper | LibreCat-ID: 1015 LibreCat
 
[290]
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.
LibreCat | DOI
 
[289]
2006 | Report | LibreCat-ID: 2518
Evaluating the GNU Software Radio platform for wireless testbeds
S. Valentin, H. von Malm, H. Karl, Evaluating the GNU Software Radio Platform for Wireless Testbeds, 2006.
LibreCat | Files available
 
[288]
2006 | Conference Paper | LibreCat-ID: 2523
Cooperative wireless networking beyond store-and-forward: Perspectives for PHY and MAC design
S. Valentin, H.S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal, A. Agustin, I. Aad, in: 2006.
LibreCat | Files available | Download (ext.)
 
[287]
2006 | Conference Paper | LibreCat-ID: 2526
An IEEE 802.21-based Universal Information Service
C. Dannewitz, S. Berg, H. Karl, in: Proc. of the Wireless World Research Forum Meeting , 2006.
LibreCat | Download (ext.)
 
[286]
2006 | Conference (Editor) | LibreCat-ID: 17417
Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems
F.-J. Rammig, W. Dangelmaier, H. Karl, B. Mertsching, F. Meyer auf der Heide, A. Trächtler, eds., Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems, Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2006.
LibreCat
 
[285]
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.
LibreCat | DOI
 
[284]
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.
LibreCat | DOI
 
[283]
2006 | Conference Paper | LibreCat-ID: 840
Wireless Sensor Networks
F. Mattern, H. Karl, K. Römer, in: K. R{\"{o}}mer, H. Karl, F. Mattern (Eds.), Third European Workshop, {EWSN} 2006, Zurich, Switzerland, February 13-15, 2006, Proceedings, 2006.
LibreCat | DOI
 
[282]
2005 | Conference Paper | LibreCat-ID: 1843
Channel-Adaptive Schedulers with State-of-the-Art Channel Predictors
A. Aguiar, A. Wolisz, H. Lederer, H. Karl, in: Proceedings of the 11th European Wireless Conference 2005, 2005.
LibreCat | Download (ext.)
 
[281]
2005 | Book | LibreCat-ID: 841
Protocols and architectures for wireless sensor networks
H. Karl, A. Willig, Protocols and Architectures for Wireless Sensor Networks, 2005.
LibreCat
 
[280]
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.
LibreCat | DOI
 
[279]
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.
LibreCat | DOI
 
[278]
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.
LibreCat | DOI
 
[277]
2005 | Journal Article | LibreCat-ID: 845
Drahtlose Sensornetze
H. Karl, T. Lentsch, H. Ritter, Praxis Der Informationsverarbeitung Und Kommunikation (2005) 66--67.
LibreCat | DOI
 
[276]
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.
LibreCat | DOI
 
[275]
2005 | Book Chapter | LibreCat-ID: 848
Ad Hoc Networks
H. Karl, in: The Industrial Information Technology Handbook, 2005, pp. 1--16.
LibreCat
 
[274]
2005 | Conference Paper | LibreCat-ID: 1013
Adaptive scheduling for heterogeneous traffic flows in cellular wireless OFDM-FDMA systems
S. Valentin, J. Gross, H. Karl, A. Wolisz, in: 10th IFIP International Conference on Personal Wireless Communications/PWC’05, Comar, France, 2005, 2005.
LibreCat
 
[273]
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.
LibreCat | DOI
 
[272]
2004 | Conference Paper | LibreCat-ID: 2529
Consensus in WSN – Identifying critical protocol mechanisms
A. Köpke, H. Karl, A. Wolisz, in: GI / ITG Fachgespräche Drahtlose Sensornetzwerke, 2004.
LibreCat | Files available
 
[271]
2004 | Conference Paper | LibreCat-ID: 1911
Channel Adaptive Techniques in the Presence of Channel Prediction Inaccuracy
A. Aguiar, H. Karl, A. Wolisz, in: Proceedings of European Wireless 2004, Barcelona / Spain , 2004.
LibreCat | Download (ext.)
 
[270]
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.
LibreCat | DOI
 
[269]
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.
LibreCat | DOI
 
[268]
2004 | Conference Paper | LibreCat-ID: 852
Improving the Energy Efficiency of Directed Diffusion Using Passive Clustering
V. Handziski, A. Köpke, H. Karl, C. Frank, W. Drytkiewicz, in: Wireless Sensor Networks, First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings, 2004, pp. 172--187.
LibreCat | DOI
 
[267]
2004 | Conference Paper | LibreCat-ID: 853
Research Challenges in Mobility and Moving Networks: An Ambient Networks View
V. Typpö, J. Eisl, J. Höller, R. Agüero, H. Karl, in: Broadband Satellite Comunication Systems and the Challenges of Mobility - IFIP TC6 Workshops on Broadband Satellite Communication Systems and Challenges of Mobility, World Computer Congress, August 22-27, 2004, Toulouse, France, 2004, pp. 145--155.
LibreCat | DOI
 
[266]
2004 | Conference Paper | LibreCat-ID: 854
Consistency challenges of service discovery in mobile ad hoc networks
C. Frank, H. Karl, in: Proceedings of the 7th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2004, Venice, Italy, October 4-6, 2004, 2004, pp. 105--114.
LibreCat | DOI
 
[265]
2004 | Conference Paper | LibreCat-ID: 855
A Geometric Derivation of the Probability of Finding a Relay in Multi-rate Networks
L. Marie Feeney, D. Hollos, M. Kubisch, S. Mengesha, H. Karl, in: NETWORKING 2004, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication, Third International IFIP-TC6 Networking Conference, Athens, Greece, May 9-14, 2004, Proceedings, 2004, pp. 1312--1317.
LibreCat | DOI
 
[264]
2004 | Conference Paper | LibreCat-ID: 856
Regionalizing global optimization algorithms to improve the operation of large ad hoc networks
D. Hollos, H. Karl, A. Wolisz, in: 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004, 2004, pp. 819--824.
LibreCat | DOI
 
[263]
2004 | Conference Paper | LibreCat-ID: 857
Queue-driven cut-through medium access in wireless ad hoc networks
D. Raguin, M. Kubisch, H. Karl, A. Wolisz, in: 2004 IEEE Wireless Communications and Networking Conference , WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004, 2004, pp. 1909--1914.
LibreCat | DOI
 
[262]
2004 | Book Chapter | LibreCat-ID: 858
Data Transmission in Mobile Communication Systems
H. Karl, in: Location-Based Services, 2004, pp. 207--244.
LibreCat
 
[261]
2004 | Conference (Editor) | LibreCat-ID: 859
Wireless Sensor Networks
H. Karl, A. Willig, A. Wolisz, eds., Wireless Sensor Networks, First European Workshop, {EWSN} 2004, Berlin, Germany, January 19-21, 2004, Proceedings, 2004.
LibreCat | DOI
 
[260]
2004 | Conference Paper | LibreCat-ID: 988
Ambient Networks--Research for Communication Networks Beyond 3G
N. Niebert, H. Flinck, R. Hancock, H. Karl, C. Prehofer, in: 13th IST Mobile and Wireless Communications-Summit 2004, 2004.
LibreCat
 
[259]
2004 | Conference Paper | LibreCat-ID: 992
Throughput study for a dynamic OFDM-FDMA system with inband signaling
J. Gross, I. Paoluzzi, H. Karl, A. Wolisz, in: Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, 2004, pp. 1787--1791.
LibreCat
 
[258]
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).
LibreCat
 
[257]
2004 | Conference Paper | LibreCat-ID: 997
Distributed allocation of time slots for real-time traffic in a wireless multi-hop network
E. Carlson, H. Karl, A. Wolisz, C. Prehofer, in: Proc. European Wireless, 2004.
LibreCat | Files available
 
[256]
2004 | Journal Article | LibreCat-ID: 998 LibreCat
 
[255]
2004 | Conference Paper | LibreCat-ID: 1002
Distributed maintenance of resource reservation paths in multihop 802.11 networks
E. Carlson, C. Bettstetter, H. Karl, C. Prehofer, A. Wolisz, in: Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th, 2004, pp. 2994--2998.
LibreCat
 
[254]
2004 | Conference Paper | LibreCat-ID: 1006
On the effect of inband signaling and realistic channel knowledge on dynamic OFDM-FDMA systems
J. Gross, H. Karl, A. Wolisz, in: European Wireless 2004, 2004.
LibreCat
 
[253]
2004 | Journal Article | LibreCat-ID: 1017 LibreCat | Files available | DOI
 
[252]
2004 | Conference Paper | LibreCat-ID: 1019
Throughput optimization of dynamic OFDM-FDMA systems with inband signaling
J. Gross, H. Karl, A. Wolisz, in: 2nd International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks 2004 (WiOpt 2004), 2004.
LibreCat
 
[251]
2003 | Report | LibreCat-ID: 2533
A common wireless sensor network architecture?
V. Handziski, A. Köpke, H. Karl, A. Wolisz, A Common Wireless Sensor Network Architecture?, Berlin, 2003.
LibreCat | Files available
 
[250]
2003 | Conference Paper | LibreCat-ID: 2535
A Mobility Frame work for OMNeT++
W. Drytkiewicz, S. Sroka, V. Handzisk, A. Köpke, H. Karl, in: Proc. of 3rd International OMNeT++ Workshop at Budapest University of Technology and Economics, 2003.
LibreCat | Files available
 
[249]
2003 | Conference Paper | LibreCat-ID: 1913
Secure, QoS-Enabled Mobility Support for IP-based Networks
X. Fu, T. Chen, A. Festag, H. Karl, G. Schäfer, C. Fan, in: Proceedings IP Based Cellular Network Conference IPCN, Paris / France, Dezember , 2003.
LibreCat | Download (ext.)
 
[248]
2003 | Conference Paper | LibreCat-ID: 1914
The Potential of Relaying in Cellular Networks
H.-F. Geerdes, H. Karl, in: Proceedings of INOC 2003, Evry/Paris, 2003.
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[247]
2003 | Conference Paper | LibreCat-ID: 1917
Channel-aware Schedulers for VoIP and MPEG4 based on Channel Prediction
A. Aguiar, C. Hoene, J. Klaue, H. Karl, H. Miesmer, A. Wolisz, in: Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03), 2003.
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[246]
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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[245]
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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[244]
2003 | Conference Paper | LibreCat-ID: 862
A Framework for Evaluating Effects of Channel Prediction Inaccuracy on the Performance of Channel Adaptive Techniques
A. Aguiar, H. Karl, A. Wolisz, H. Miesmer, in: Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, {USA}, 2003, pp. 3--9.
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[243]
2003 | Conference Paper | LibreCat-ID: 863
Comparison of Heuristic and Optimal Subcarrier Assignment Algorithms
J. Gross, H. Karl, F. H. P. Fitzek, A. Wolisz, in: Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, {USA}, 2003, pp. 249--255.
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[242]
2003 | Conference Paper | LibreCat-ID: 864
EYES} - Energy Efficient Sensor Networks
P. J. M. Havinga, S. Etalle, H. Karl, C. Petrioli, M. Zorzi, H. Kip, T. Lentsch, in: Personal Wireless Communications, IFIP-TC6 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings, 2003, pp. 198--201.
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[241]
2003 | Conference Paper | LibreCat-ID: 865
Are Classes of Nodes with Different Power Amplifiers Good for Wireless Multi-hop Networks?
M. Kubisch, H. Karl, A. Wolisz, in: Personal Wireless Communications, {IFIP-TC6} 8th International Conference, {PWC} 2003, Venice, Italy, September 23-25, 2003, Proceedings, 2003, pp. 841--846.
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[240]
2003 | Conference Paper | LibreCat-ID: 866
Chaotic Maps as Parsimonious Bit Error Models of Wireless Channels
A. Köpke, A. Willig, H. Karl, in: Proceedings IEEE INFOCOM 2003, The 22nd Annual Joint Conference of the IEEE Computer and Communications Societies, San Franciso, CA, USA, March 30 - April 3, 2003, 2003, pp. 513--523.
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[239]
2003 | Conference Paper | LibreCat-ID: 867
Performance Evaluation of a QoS-Aware Handover Mechanism
S. Sroka, H. Karl, in: Proceedings of the Eighth IEEE Symposium on Computers and Communications (ISCC 2003), 30 June - 3 July 2003, Kiris-Kemer, Turkey, 2003, pp. 117--124.
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[238]
2003 | Conference Paper | LibreCat-ID: 868
Applying ad-hoc relaying to improve capacity, energy efficiency, and immission in infrastructure-based WLANs
M. Kubisch, S. Mengesha, D. Hollos, H. Karl, A. Wolisz, in: Kommunikation in Verteilten Systemen KiVS, 13. Fachtagung Kommunikation in Verteilten Systemen. KiVS 2003, 25.-28. Februar 2003, Leipzig, Eine Veranstaltung Der Informationstechnischen Gesellschaft (ITG/VDE) Unter Beteiligung Der Gesellschaft Für Informatik (GI) Ausgerichtet von Der Universität Leipzig, 2003, pp. 195--206.
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[237]
2003 | Conference Paper | LibreCat-ID: 869
Classification and Evaluation of Multicast-Based Mobility Support in All-IP Cellular Networks
A. Festag, H. Karl, A. Wolisz, in: Kommunikation in Verteilten Systemen (KiVS), 13. Fachtagung Kommunikation in Verteilten Systemen. KiVS 2003, 25.-28. Februar 2003, Leipzig, Eine Veranstaltung Der Informationstechnischen Gesellschaft (ITG/VDE) Unter Beteiligung Der Gesellschaft Für Informatik (GI) Ausgerichtet von Der Universität Leipzig, 2003, pp. 233--244.
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[236]
2003 | Conference Paper | LibreCat-ID: 870
Distributed algorithms for transmission power control in wireless sensor networks
M. Kubisch, H. Karl, A. Wolisz, L. Charlie Zhong, J. M. Rabaey, in: 2003 IEEE Wireless Communications and Networking, WCNC 2003, New Orleans, LA, USA, 16-20 March, 2003, 2003, pp. 558--563.
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[235]
2003 | Conference Paper | LibreCat-ID: 987
A mobility framework for omnet++
W. Drytkiewicz, S. Sroka, V. Handziski, A. Köpke, H. Karl, in: 3rd International OMNeT++ Workshop, 2003.
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[234]
2003 | Journal Article | LibreCat-ID: 989 LibreCat
 
[233]
2003 | Conference Paper | LibreCat-ID: 991
Subcarrier allocation for variable bit rate video streams in wireless OFDM systems
J. Gross, J. Klaue, H. Karl, A. Wolisz, in: Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, 2003, pp. 2481--2485.
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[232]
2003 | Conference Paper | LibreCat-ID: 994
A data aggregation framework for wireless sensor networks
H. Karl, M. Löbbers, T. Nieberg, in: Proc. Dutch Technology Foundation ProRISC Workshop on Circuits, Systems and Signal Processing, 2003.
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[231]
2003 | Conference Paper | LibreCat-ID: 999
Semantic-aware link layer scheduling of mpeg-4 video streams in wireless systems
J. Klaue, J. Gross, H. Karl, A. Wolisz, in: 3rd Workshop of Applications and Services in Wireless Networks 2003 (ASWN 2003), 2003.
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[230]
2003 | Conference Paper | LibreCat-ID: 1008
Prototype implementation and performance evaluation of a QoS-conditionalized handoff scheme for mobile IPv6 networks
A. Neumann, X. Fu, H. Karl, in: Computer Communications, 2003. CCW 2003. Proceedings. 2003 IEEE 18th Annual Workshop On, 2003, pp. 24--29.
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[229]
2003 | Conference Paper | LibreCat-ID: 1024
Channel-Aware Schedulers For Voip And Mpeg4 For Wireless Communications
A.C.C. Aguiar, C. Hoene, J. Klaue, H. Karl, H. Miesmer, A. Wolisz, in: Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03), 2003.
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[228]
2002 | Report | LibreCat-ID: 2538
Relaying in Wireless Access Networks
H. Karl, S. Mengesha, D. Hollos, Relaying in Wireless Access Networks , Business Briefing: Wireless Technology 2002, London, 2002.
LibreCat | Files available
 
[227]
2002 | Conference Paper | LibreCat-ID: 2541
Making sensor networks intelligent
A. Köpke, V. Handziski, H. Karl, in: Proc. 7th Wireless World Research Forum (WWRF), Eindhoven/Netherlands, 2002.
LibreCat | Files available
 
[226]
2002 | Conference Paper | LibreCat-ID: 2544
Concepts for a QoS-enabled, TCP/IP-oriented Link Layer in Beyond 3G Networks
H. Miesmer, H. Sanneck, A. Aguier, H. Karl, in: Proc. of 6th Wireless World Forum, London / GB, 2002.
LibreCat | Files available
 
[225]
2002 | Conference Paper | LibreCat-ID: 2548
A HiperLAN/2 simulation model in OMNeT++
D. Hollos, H. Karl, in: Proc. of 2nd Intl. OMNet Workshop, Berlin , 2002.
LibreCat | Files available
 
[224]
2002 | Conference Paper | LibreCat-ID: 1921
New Scheduling Algorithm for Providing Proportional Jitter in Differentiated Service Network
T. Ngo-Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Proc. IST Mobile & Wireless Telecommunications Summit 2002., 2002.
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[223]
2002 | Conference Paper | LibreCat-ID: 871
QoS-Conditionalized Handoff for Mobile IPv6
X. Fu, H. Karl, C. Kappler, in: NETWORKING 2002, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; and Mobile and Wireless Communications, Second International IFIP-TC6 Networking Conference, Pisa, Italy, May 19-24, 2002, Proceedings, 2002, pp. 721--730.
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[222]
2002 | Conference Paper | LibreCat-ID: 872
A protocol extension to HiperLAN/2 to support single-relay networks
D. Hollos, H. Karl, in: Mobile Ad-Hoc Netzwerke, 1. Deutscher Workshop Über Mobile Ad-Hoc Netzwerke WMAN 2002, 25.-26. März 2002 in Ulm, 2002, pp. 91--107.
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[221]
2002 | Conference Paper | LibreCat-ID: 990
M-SCTP: Design and prototypical implementation of an end-to-end mobility concept
W. Xing, H. Karl, A. Wolisz, H. Müller, in: In Proc. 5th Intl. Workshop The Internet Challenge: Technology and Applications, 2002, p. 43.
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[220]
2002 | Conference Paper | LibreCat-ID: 1001
Using only Proportional Jitter Scheduling at the boundary of a Differentiated Service Network: simple and efficient
T.N. Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Universal Multiservice Networks, 2002. ECUMN 2002. 2nd European Conference On, 2002, pp. 116--123.
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[219]
2002 | Conference Paper | LibreCat-ID: 1009
Using akaroa2 with omnet++
S. Sroka, H. Karl, in: 2nd International OMNeT++ Workshop, Berlin, Germany, 2002.
LibreCat | Files available
 
[218]
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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[217]
2002 | Conference Paper | LibreCat-ID: 1020
Effects of prediction inaccuracy on the performance of channelstate-aware link layer schedulers
A. Aguiar, H. Karl, A. Wolisz, in: Proc. of 1st Intl. Conf. on Mobile and Ubiquitous Multimedia, 2002, pp. 21--33.
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[216]
2001 | Conference Paper | LibreCat-ID: 2552
Relaying in Wireless Access Networks – A Capacity and Energy-Efficiency Perspective
H. Karl, in: Proc. Wireless World Research Forum Kickoff Meeting (WWRF), München, 2001.
LibreCat | Files available
 
[215]
2001 | Conference Paper | LibreCat-ID: 2554
Relaying ñ bad for energy, good for capacity?
H. Karl, in: Eork-in-progress session of mobicom 2001, Rom/Italy, 2001.
LibreCat | Files available
 
[214]
2001 | Conference Paper | LibreCat-ID: 2556
IBMS 2 - Integriertes Bandbreiteneffizientes Mobiles Software-Radio System
H. Karl, T. Hentschel, in: Zukunftsperspektiven Der Mobilkommunikation, Symposium Bundesministerium Für Bildung Und Forschung, 2001.
LibreCat | Files available
 
[213]
2001 | Conference Paper | LibreCat-ID: 873
Improving Goodput by Relaying in Transmission-Power-Limited Wireless Systems
S. Mengesha, H. Karl, A. Wolisz, in: GI Jahrestagung (1), 2001, pp. 537--544.
LibreCat
 
[212]
2001 | Conference Paper | LibreCat-ID: 995
Analysing capacity improvements in wireless networks by relaying
H. Karl, S. Mengesha, in: Proc. of IEEE Intl. Conf. on Wireless LANs and Home Networks, 2001, pp. 339--348.
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[211]
2001 | Conference Paper | LibreCat-ID: 996
Relative jitter packet scheduling for differentiated services
T. Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Proc. 9th IFIP Conf. Perf. Modeling and Eval. of ATM & IP Networks, 2001.
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[210]
2001 | Conference Paper | LibreCat-ID: 1016
The influence of proportional jitter and delay on end to end delay in differentiated service network
T.N. Quynh, H. Karl, A. Wolisz, K. Rebensburg, in: Network Computing and Applications, 2001. NCA 2001. IEEE International Symposium On, 2001, pp. 354--357.
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[209]
2000 | Conference Paper | LibreCat-ID: 1920
Predictable Network Computing using Message-driven Scheduling
H. Karl, A. Polze, M. Werner, in: Proc. the Workshop on Run-Time Systems for Parallel Programming, 2000.
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[208]
1999 | Conference Paper | LibreCat-ID: 874
Towards Quality of Service for Parallel Computing: An Overview of the MILAN Project
H. Karl, in: High-Performance Computing and Networking, 7th International Conference, HPCN Europe 1999, Amsterdam, The Netherlands, April 12-14, 1999, Proceedings, 1999, pp. 841--850.
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[207]
1999 | Conference Paper | LibreCat-ID: 875
Coscheduling through Synchronized Scheduling Servers -- A Prototype and Experiments
H. Karl, in: Parallel and Distributed Processing, 11 IPPS/SPDP’99 Workshops Held in Conjunction with the 13th International Parallel Processing Symposium and 10th Symposium on Parallel and Distributed Processing, San Juan, Puerto Rico, USA, April 12-16, 1999, Proceedings, 1999, pp. 1115--1129.
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[206]
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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[205]
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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[204]
1998 | Conference Paper | LibreCat-ID: 879
An Experimental Investigation of Message Latencies in the Totem Protocol in the Presence of Faults
H. Karl, M. Werner, L. Kuttner, in: 24th EUROMICRO ’98 Conference, Engineering Systems and Software for the Next Decade, 25-27 August 1998, Vesteras, Sweden, 1998, pp. 10468--10475.
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[203]
1998 | Conference Paper | LibreCat-ID: 1012
An optimal checkpointing interval for real-time systems
H. Karl, M. Werner, in: Proc. Intl. Conf. Parallel and Distributed Processing Techniques and Applications, 1998, pp. 604--612.
LibreCat
 
[202]
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).
LibreCat | Files available
 
[201]
1996 | Conference Paper | LibreCat-ID: 880
ReGTime - Rent Gigaflops someTimes
B. Dreier, A. Huber, H. Karl, T. Ungerer, M. Zahn, in: Trends in Distributed Systems: CORBA and Beyond, International Workshop TreDS ’96, Aachen, Germany, October 1-2, 1996, Proceedings, 1996, pp. 84--93.
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