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363 Publications
2007 | Conference Paper | LibreCat-ID: 1840
Woldegebreal DH, Karl H. Multiple-Access Relay Channel with Network Coding and Non-Ideal Source-Relay Channels. In: 2007 4th International Symposium on Wireless Communication Systems. IEEE; 2007. doi:10.1109/iswcs.2007.4392437
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2007 | Conference Paper | LibreCat-ID: 1842
Karl H. Optimizing sleeping intervals in preamble sampling MAC for WSNs. In: Bern / Switzerland: Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference; 2007.
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2007 | Journal Article | LibreCat-ID: 830
Festag A, Karl H, Wolisz A. Investigation of multicast-based mobility support in all-IP cellular networks. Wireless Communications and Mobile Computing. 2007;(3):319--339. doi:10.1002/wcm.328
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2007 | Conference Paper | LibreCat-ID: 831
van der Stok P, Karl H, De Ambroggi F, et al. WASP - Wirelessly Accessible Sensor Populations: A Project Overview. In: Constructing Ambient Intelligence - AmI 2007 Workshops Darmstadt, Germany, November 7-10, 2007 Revised Papers. ; 2007:426--429. doi:10.1007/978-3-540-85379-4_49
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2007 | Conference Paper | LibreCat-ID: 832
H. Woldegebreal D, Valentin S, Karl H. Outage probability analysis of cooperative transmission protocols without and with network coding: inter-user channels based comparison. 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. ; 2007:36--44. doi:10.1145/1298126.1298136
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2007 | Conference Paper | LibreCat-ID: 833
Valentin S, von Malm H, Karl H. Traffic-Aware Asymmetric Cooperation Diversity for Media Streaming in Wireless Networks. In: Proceedings of the IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2007, 3-7 September 2007, Athens, Greece. ; 2007:1--6. doi:10.1109/PIMRC.2007.4394223
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2007 | Conference Paper | LibreCat-ID: 834
S. Lichte H, Valentin S, Eitzen F, Stege M, Unger C, Karl H. Integrating multiuser dynamic OFDMA into IEEE 802.11a and prototyping it on a real-time software-defined radio testbed. 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. ; 2007:1--9. doi:10.1109/TRIDENTCOM.2007.4444671
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2007 | Conference Paper | LibreCat-ID: 835
Valentin S, Karl H. Effect of User Mobility in Coded Cooperative Systems with Joint Partner and Cooperation Level Selection. In: IEEE Wireless Communications and Networking Conference, WCNC 2007, Hong Kong, China, 11-15 March, 2007. ; 2007:896--901. doi:10.1109/WCNC.2007.170
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2007 | Conference Paper | LibreCat-ID: 836
Marie Feeney L, Cetin B, Hollos D, Kubisch M, Mengesha S, Karl H. Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs. In: Wired/Wireless Internet Communications, 5th International Conference, WWIC 2007, Coimbra, Portugal, May 23-25, 2007, Proceedings. ; 2007:201--212. doi:10.1007/978-3-540-72697-5_17
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2007 | Conference Paper | LibreCat-ID: 1015
Valentin S, Karl H. Analyzing the effect of asymmetric mobility and channel configurations on the outage performance of coded cooperative systems. In: Proc. of the European Wireless Conference (EW). ; 2007.
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2007 | Journal Article | LibreCat-ID: 1018
Valentin S, Lichte HS, Karl H, et al. Implementing cooperative wireless networks. Cognitive Wireless Networks. 2007:155--178. doi:10.1007/978-1-4020-5979-7_8
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2006 | Report | LibreCat-ID: 2518
Valentin S, von Malm H, Karl H. Evaluating the GNU Software Radio Platform for Wireless Testbeds.; 2006.
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2006 | Conference Paper | LibreCat-ID: 2523
Valentin S, Lichte HS, Karl H, et al. Cooperative wireless networking beyond store-and-forward: Perspectives for PHY and MAC design. In: ; 2006.
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2006 | Conference Paper | LibreCat-ID: 2526
Dannewitz C, Berg S, Karl H. An IEEE 802.21-based Universal Information Service . In: Proc. of the Wireless World Research Forum Meeting . ; 2006.
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2006 | Journal Article | LibreCat-ID: 837
Hoene C, Karl H, Wolisz A. A perceptual quality model intended for adaptive VoIP applications. Int J Communication Systems. 2006;(3):299--316. doi:10.1002/dac.755
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2006 | Journal Article | LibreCat-ID: 838
Gross J, Geerdes H-}Florian, Karl H, Wolisz A. Performance analysis of dynamic OFDMA systems with inband signaling. IEEE Journal on Selected Areas in Communications. 2006;(3):427--436. doi:10.1109/JSAC.2005.862386
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2006 | Journal Article | LibreCat-ID: 839
Carlson E, Prehofer C, Bettstetter C, Karl H, Wolisz A. A Distributed End-to-End Reservation Protocol for IEEE 802.11-Based Wireless Mesh Networks. IEEE Journal on Selected Areas in Communications. 2006;(11):2018--2027. doi:10.1109/JSAC.2006.881633
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2006 | Conference Paper | LibreCat-ID: 840
Mattern F, Karl H, Römer K. Wireless Sensor Networks. In: R{\"{o}}mer K, Karl H, Mattern F, eds. Third European Workshop, {EWSN} 2006, Zurich, Switzerland, February 13-15, 2006, Proceedings. Lecture Notes in Computer Science. ; 2006. doi:10.1007/11669463
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2005 | Conference Paper | LibreCat-ID: 1843
Aguiar A, Wolisz A, Lederer H, Karl H. Channel-Adaptive Schedulers with State-of-the-Art Channel Predictors. In: Proceedings of the 11th European Wireless Conference 2005. ; 2005.
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2005 | Book | LibreCat-ID: 841
Karl H, Willig A. Protocols and Architectures for Wireless Sensor Networks.; 2005.
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2005 | Journal Article | LibreCat-ID: 842
Ebert J-P, Hollos D, Karl H, Löbbers M. Does Multi-Hop Communication Reduce Electromagnetic Exposure? Comput J. 2005;(1):72--83. doi:10.1093/comjnl/bxh062
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2005 | Journal Article | LibreCat-ID: 843
Savoric M, Karl H, Schläger M, Poschwatta T, Wolisz A. Analysis and performance evaluation of the EFCM common congestion controller for TCP connections. Computer Networks. 2005;(2):269--294. doi:10.1016/j.comnet.2005.01.012
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2005 | Journal Article | LibreCat-ID: 844
Gross J, Valentin S, Karl H, Wolisz A. A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system. European Transactions on Telecommunications. 2005;(1):37--49. doi:10.1002/ett.1030
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2005 | Journal Article | LibreCat-ID: 845
Karl H, Lentsch T, Ritter H. Drahtlose Sensornetze. Praxis der Informationsverarbeitung und Kommunikation. 2005;(2):66--67. doi:10.1515/PIKO.2005.66
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2005 | Journal Article | LibreCat-ID: 846
Willig A, Karl H. Data Transport Reliability in Wireless Sensor Networks. A Survey of Issues and Solutions. Praxis der Informationsverarbeitung und Kommunikation. 2005;(2):86--92. doi:10.1515/PIKO.2005.86
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2005 | Conference Paper | LibreCat-ID: 847
Kopke A, Karl H, Lobbers M. Using energy where it counts: protecting important messages in the link layer. In: Wireless Sensor Networks, Second European Workshop, EWSN 2005, Istanbul, Turkey, January 31 - February 2, 2005, Proceedings. ; 2005:226--235. doi:10.1109/EWSN.2005.1462015
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2005 | Book Chapter | LibreCat-ID: 848
Karl H. Ad Hoc Networks. In: The Industrial Information Technology Handbook. ; 2005:1--16.
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2005 | Conference Paper | LibreCat-ID: 1013
Valentin S, Gross J, Karl H, Wolisz A. Adaptive scheduling for heterogeneous traffic flows in cellular wireless OFDM-FDMA systems. In: 10th IFIP International Conference on Personal Wireless Communications/PWC’05, Comar, France, 2005. ; 2005.
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2005 | Journal Article | LibreCat-ID: 1378
Gross J, Valentin S, Karl H, Wolisz A. A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system. European Transactions on Telecommunications. 2005;16(1):37-49. doi:10.1002/ett.1030
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2004 | Conference Paper | LibreCat-ID: 2529
Köpke A, Karl H, Wolisz A. Consensus in WSN – Identifying critical protocol mechanisms. In: GI / ITG Fachgespräche Drahtlose Sensornetzwerke. ; 2004.
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2004 | Conference Paper | LibreCat-ID: 1911
Aguiar A, Karl H, Wolisz A. Channel Adaptive Techniques in the Presence of Channel Prediction Inaccuracy. In: Proceedings of European Wireless 2004, Barcelona / Spain . ; 2004.
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2004 | Journal Article | LibreCat-ID: 850
Gross J, Klaue J, Karl H, Wolisz A. Cross-layer optimization of OFDM transmission systems for MPEG-4 video streaming. Computer Communications. 2004;(11):1044--1055. doi:10.1016/j.comcom.2004.01.010
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2004 | Journal Article | LibreCat-ID: 851
Niebert N, Schieder A, Abramowicz H, et al. Ambient networks: An architecture for communication networks beyond 3G. IEEE Wireless Communications. 2004;(2):14--22. doi:10.1109/MWC.2004.1295733
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2004 | Conference Paper | LibreCat-ID: 852
Handziski V, Köpke A, Karl H, Frank C, Drytkiewicz W. Improving the Energy Efficiency of Directed Diffusion Using Passive Clustering. In: Wireless Sensor Networks, First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings. ; 2004:172--187. doi:10.1007/978-3-540-24606-0_12
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2004 | Conference Paper | LibreCat-ID: 853
Typpö V, Eisl J, Höller J, Agüero R, Karl H. Research Challenges in Mobility and Moving Networks: An Ambient Networks View. 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. ; 2004:145--155. doi:10.1007/0-387-24043-8_15
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2004 | Conference Paper | LibreCat-ID: 854
Frank C, Karl H. Consistency challenges of service discovery in mobile ad hoc networks. 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. ; 2004:105--114. doi:10.1145/1023663.1023684
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2004 | Conference Paper | LibreCat-ID: 855
Marie Feeney L, Hollos D, Kubisch M, Mengesha S, Karl H. A Geometric Derivation of the Probability of Finding a Relay in Multi-rate Networks. 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. ; 2004:1312--1317. doi:10.1007/978-3-540-24693-0_112
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2004 | Conference Paper | LibreCat-ID: 856
Hollos D, Karl H, Wolisz A. Regionalizing global optimization algorithms to improve the operation of large ad hoc networks. In: 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004. ; 2004:819--824. doi:10.1109/WCNC.2004.1311292
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2004 | Conference Paper | LibreCat-ID: 857
Raguin D, Kubisch M, Karl H, Wolisz A. Queue-driven cut-through medium access in wireless ad hoc networks. In: 2004 IEEE Wireless Communications and Networking Conference , WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004. ; 2004:1909--1914. doi:10.1109/WCNC.2004.1311845
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2004 | Book Chapter | LibreCat-ID: 858
Karl H. Data Transmission in Mobile Communication Systems. In: Location-Based Services. ; 2004:207--244.
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2004 | Conference (Editor) | LibreCat-ID: 859
Karl H, Willig A, Wolisz A, eds. Wireless Sensor Networks. First European Workshop, {EWSN} 2004, Berlin, Germany, January 19-21, 2004, Proceedings; 2004. doi:10.1007/b94854
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2004 | Conference Paper | LibreCat-ID: 988
Niebert N, Flinck H, Hancock R, Karl H, Prehofer C. Ambient Networks--Research for Communication Networks Beyond 3G. In: 13th IST Mobile and Wireless Communications-Summit 2004. ; 2004.
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2004 | Conference Paper | LibreCat-ID: 992
Gross J, Paoluzzi I, Karl H, Wolisz A. Throughput study for a dynamic OFDM-FDMA system with inband signaling. In: Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th. ; 2004:1787--1791.
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2004 | Journal Article | LibreCat-ID: 993
Klimin N, Enkelmann W, Karl H, Wolisz A. A hybrid approach for location-based service discovery in vehicular ad hoc networks. Proc of WIT. 2004.
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2004 | Conference Paper | LibreCat-ID: 997
Carlson E, Karl H, Wolisz A, Prehofer C. Distributed allocation of time slots for real-time traffic in a wireless multi-hop network. In: Proc. European Wireless. ; 2004.
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2004 | Journal Article | LibreCat-ID: 998
Mengesha S, Karl H, Wolisz A. Capacity increase of multi-hop cellular wlans exploiting data rate adaptation and frequency recycling. Proc of MedHocNet 2004. 2004.
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2004 | Conference Paper | LibreCat-ID: 1002
Carlson E, Bettstetter C, Karl H, Prehofer C, Wolisz A. Distributed maintenance of resource reservation paths in multihop 802.11 networks. In: Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th. ; 2004:2994--2998.
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2004 | Conference Paper | LibreCat-ID: 1006
Gross J, Karl H, Wolisz A. On the effect of inband signaling and realistic channel knowledge on dynamic OFDM-FDMA systems. In: European Wireless 2004. ; 2004.
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2004 | Journal Article | LibreCat-ID: 1017
Kubisch M, Karl H, Wolisz A. A MAC protocol for wireless sensor networks with multiple selectable, fixed-orientation antennas. Frequenz. 2004;(3-4):92--96. doi:/10.1.1.3.3185
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2004 | Conference Paper | LibreCat-ID: 1019
Gross J, Karl H, Wolisz A. Throughput optimization of dynamic OFDM-FDMA systems with inband signaling. In: 2nd International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks 2004 (WiOpt 2004). ; 2004.
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