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250 Publications


2009 | Conference Paper | LibreCat-ID: 1828
Improving Network Coded Cooperation by Soft Information
T. Volkhausen, D.H. Woldegebreal, H. Karl, in: 2009 6th IEEE Annual Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks Workshops, IEEE, 2009.
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2009 | Conference Paper | LibreCat-ID: 1829
Combining for Cooperative WLANs - A Reality Check Based on Prototype Measurements
S. Valentin, D.H. Woldegebreal, T. Volkhausen, H. Karl, in: 2009 IEEE International Conference on Communications Workshops, IEEE, 2009.
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2009 | Conference Paper | LibreCat-ID: 1832
Modeling obstacles in INET/Mobility framework: motivation, integration, and performance
H.S. Lichte, J. Weide, in: Proceedings of the Second International ICST Conference on Simulation Tools and Techniques, ICST, 2009.
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2009 | Conference Paper | LibreCat-ID: 1833
Design considerations for a network of information
B. Ahlgren, V. Vercellone, M. D’Ambrosio, M. Marchisio, I. Marsh, C. Dannewitz, B. Ohlman, K. Pentikousis, O. Strandberg, R. Rembarz, in: Proceedings of the 2008 ACM CoNEXT Conference on - CONEXT ’08, ACM Press, 2009.
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2009 | Conference Paper | LibreCat-ID: 816
An Adaptive Resource/Performance Trade-Off for Resolving Complex Queries in P2P Networks
T. Biermann, C. Dannewitz, H. Karl, in: Proceedings of IEEE International Conference on Communications, ICC 2009, Dresden, Germany, 14-18 June 2009, 2009, pp. 1--6.
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2009 | Conference Paper | LibreCat-ID: 817
Rate-Per-Link Adaptation in Cooperative Wireless Networks with Multi-Rate Combining
H. S. Lichte, S. Valentin, H. von Malm, H. Karl, A. Bin Sediq, I. Aad, in: Proceedings of IEEE International Conference on Communications, ICC 2009, Dresden, Germany, 14-18 June 2009, 2009, pp. 1--6.
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2009 | Conference Paper | LibreCat-ID: 818
The Gain of Overbooking
G. Birkenheuer, A. Brinkmann, H. Karl, in: Job Scheduling Strategies for Parallel Processing, 14th International Workshop, JSSPP 2009, Rome, Italy, May 29, 2009. Revised Papers, 2009, pp. 80–100.
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2009 | Conference Paper | LibreCat-ID: 819
Analyzing space/capacity tradeoffs of cooperative wireless networks using a probabilistic model of interference
H. Simon Lichte, S. Valentin, H. Karl, I. Aad, J. Widmer, in: Proceedings of the 12th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2009, Tenerife, Canary Islands, Spain, October 26-19, 2009, 2009, pp. 54--62.
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2009 | Conference Paper | LibreCat-ID: 820
Creating Butterflies in the Core - A Network Coding Extension for MPLS/RSVP-TE
T. Biermann, A. Schwabe, H. Karl, in: NETWORKING 2009, 8th International IFIP-TC 6 Networking Conference, Aachen, Germany, May 11-15, 2009. Proceedings, 2009, pp. 883--894.
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2009 | Conference Paper | LibreCat-ID: 821
A virtual network mapping algorithm based on subgraph isomorphism detection
J. Lischka, H. Karl, in: Proceedings of the 1st ACM SIGCOMM Workshop on Virtualized Infrastructure Systems and Architectures, VISA 2009, Barcelona, Spain, August 17, 2009, 2009, pp. 81--88.
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2009 | Conference Paper | LibreCat-ID: 1005
Cooperation and coding framework
T. Biermann, Z.A. Polgar, H. Karl, in: Communications Workshops, 2009. ICC Workshops 2009. IEEE International Conference On, 2009, pp. 1--5.
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2009 | Conference Paper | LibreCat-ID: 1010
Combining for cooperative WLANs-a reality check based on prototype measurements
S. Valentin, D.H. Woldegebreal, T. Volkhausen, H. Karl, in: Communications Workshops, 2009. ICC Workshops 2009. IEEE International Conference On, 2009, pp. 1--5.
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2009 | Conference Paper | LibreCat-ID: 1011
Improving network coded cooperation by soft information
T. Volkhausen, D.H. Woldegebreal, H. Karl, in: Sensor, Mesh and Ad Hoc Communications and Networks Workshops, 2009. SECON Workshops’ 09. 6th Annual IEEE Communications Society Conference On, 2009, pp. 1--6.
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2009 | Conference Paper | LibreCat-ID: 1032
Statistics-based ID management for load balancing in structured P2P networks
D. Warneke, C. Dannewitz, in: 2009 IEEE 34th Conference on Local Computer Networks, IEEE, 2009.
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2008 | Conference Paper | LibreCat-ID: 2356
Employing WS-BPEL Design Patterns for Grid Service Orchestration using a Standard WS-BPEL Engine and a Grid Middleware
A. Brinkmann, S. Gudenkauf, W. Hasselbring, A. Höing, H. Karl, O. Kao, H. Nitsche, G. Scherp, in: Proc. Cracow Grid Workshop (CGW), 2008, pp. 103–110.
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2008 | Conference (Editor) | LibreCat-ID: 2376
Proceedings of the 1. GI/ITG KuVS Fachgespräch Virtualisierung
A. Brinkmann, H. Karl, eds., Proceedings of the 1. GI/ITG KuVS Fachgespräch Virtualisierung, Paderborn Center for Parallel Computing, Paderborn University, 2008.
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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2007 | Conference Paper | LibreCat-ID: 1015 LibreCat
 

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.
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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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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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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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2005 | Conference Paper | LibreCat-ID: 847
Using energy where it counts: protecting important messages in the link layer
A. Kopke, H. Karl, M. Lobbers, in: Wireless Sensor Networks, Second European Workshop, EWSN 2005, Istanbul, Turkey, January 31 - February 2, 2005, Proceedings, 2005, pp. 226--235.
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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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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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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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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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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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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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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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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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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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