D. H. Woldegebreal and H. Karl, “Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension,” in Lecture Notes in Computer Science, Berlin, Heidelberg: Springer Berlin Heidelberg, 2008, pp. 141–155.
LibreCat: /record/1841
DOI: 10.1007/978-3-540-77690-1_9

D. H. Woldegebreal and H. Karl, “Network-Coding-Based Cooperative Transmission in Wireless Sensor Networks: Diversity-Multiplexing Tradeoff and Coverage Area Extension,” in Wireless Sensor Networks, 5th European Conference, EWSN 2008, Bologna, Italy, January 30-February 1, 2008, Proceedings, 2008, pp. 141--155.
LibreCat: /record/822
DOI: 10.1007/978-3-540-77690-1_9

S. Valentin, T. Freitag, and H. Karl, “Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance,” in Proceedings of IEEE International Conference on Communications, ICC 2008, Beijing, China, 19-23 May 2008, 2008, pp. 3328--3334.
LibreCat: /record/823
DOI: 10.1109/ICC.2008.626

H. S. Lichte, S. Valentin, H. Karl, I. Aad, L. Loyola, and J. Widmer, “Design and Evaluation of a Routing-Informed Cooperative MAC Protocol for Ad Hoc Networks,” 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: /record/824
DOI: 10.1109/INFOCOM.2008.249

S. Valentin, H. S. Lichte, H. Karl, I. Aad, L. Loyola, and J. Widmer, “Opportunistic relaying vs. selective cooperation: analyzing the occurrence-conditioned outage capacity,” 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: /record/825
DOI: 10.1145/1454503.1454539

S. Valentin, T. Volkhausen, F. Atay Onat, H. Yanikomeroglu, and H. Karl, “Decoding-based channel estimation for selective cooperation diversity protocols,” 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: /record/826
DOI: 10.1109/PIMRC.2008.4699545

S. Valentin, H. S. Lichte, D. Warneke, T. Biermann, R. Funke, and H. Karl, “Mobile Cooperative WLANs - MAC and Transceiver Design, Prototyping, and Field Measurements,” in Proceedings of the 68th IEEE Vehicular Technology Conference, VTC Fall 2008, 21-24 September 2008, Calgary, Alberta, Canada, 2008, pp. 1--5.
LibreCat: /record/827
DOI: 10.1109/VETECF.2008.350

D. H. Woldegebreal, S. Valentin, and H. Karl, “Incremental Network Coding in Cooperative Transmission Wireless Networks,” in Proceedings of the 68th IEEE Vehicular Technology Conference, VTC Fall 2008, 21-24 September 2008, Calgary, Alberta, Canada, 2008, pp. 1--5.
LibreCat: /record/828
DOI: 10.1109/VETECF.2008.346

D. Platz, D. H. Woldegebreal, and H. Karl, “Random network coding in wireless sensor networks: Energy efficiency via cross-layer approach,” in Spread Spectrum Techniques and Applications, 2008 IEEE 10th International Symposium on, 2008, pp. 654--660.
LibreCat: /record/1003

S. Valentin, T. Volkhausen, F. A. Onat, H. Yanikomeroglu, and H. Karl, “Enabling partial forwarding by decoding-based one and two-stage selective cooperation,” in Communications Workshops, 2008. ICC Workshops’ 08. IEEE International Conference on, 2008, pp. 129--133.
LibreCat: /record/1007

F. Eitzen, S. Valentin, K. Gossens, H. Karl, and O. Rolfes, Experimental evaluation of IEEE 802.11a-based WLANs for medium range communication. 2007.
LibreCat: /record/2515

D. H. Woldegebreal and H. Karl, “Multiple-Access Relay Channel with Network Coding and Non-Ideal Source-Relay Channels,” in 2007 4th International Symposium on Wireless Communication Systems, 2007.
LibreCat: /record/1840
DOI: 10.1109/iswcs.2007.4392437

H. Karl, “Optimizing sleeping intervals in preamble sampling MAC for WSNs,” 2007.
LibreCat: /record/1842

A. Festag, H. Karl, and A. Wolisz, “Investigation of multicast-based mobility support in all-IP cellular networks,” Wireless Communications and Mobile Computing, no. 3, pp. 319--339, 2007.
LibreCat: /record/830
DOI: 10.1002/wcm.328

P. van der Stok 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, pp. 426--429.
LibreCat: /record/831
DOI: 10.1007/978-3-540-85379-4_49

D. H. Woldegebreal, S. Valentin, and H. Karl, “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, pp. 36--44.
LibreCat: /record/832
DOI: 10.1145/1298126.1298136

S. Valentin, H. von Malm, and H. Karl, “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, pp. 1--6.
LibreCat: /record/833
DOI: 10.1109/PIMRC.2007.4394223

H. S. Lichte, S. Valentin, F. Eitzen, M. Stege, C. Unger, and H. Karl, “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, pp. 1--9.
LibreCat: /record/834
DOI: 10.1109/TRIDENTCOM.2007.4444671

S. Valentin and H. Karl, “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, pp. 896--901.
LibreCat: /record/835
DOI: 10.1109/WCNC.2007.170

L. Marie Feeney, B. Cetin, D. Hollos, M. Kubisch, S. Mengesha, and H. Karl, “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, pp. 201--212.
LibreCat: /record/836
DOI: 10.1007/978-3-540-72697-5_17

S. Valentin and H. Karl, “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.
LibreCat: /record/1015

S. Valentin et al., “Implementing cooperative wireless networks,” Cognitive Wireless Networks, pp. 155--178, 2007.
LibreCat: /record/1018
DOI: 10.1007/978-1-4020-5979-7_8

S. Valentin, H. von Malm, and H. Karl, Evaluating the GNU Software Radio platform for wireless testbeds. 2006.
LibreCat: /record/2518

S. Valentin et al., “Cooperative wireless networking beyond store-and-forward: Perspectives for PHY and MAC design,” 2006.
LibreCat: /record/2523

C. Dannewitz, S. Berg, and H. Karl, “An IEEE 802.21-based Universal Information Service ,” in  Proc. of the Wireless World Research Forum Meeting , 2006.
LibreCat: /record/2526

C. Hoene, H. Karl, and A. Wolisz, “A perceptual quality model intended for adaptive VoIP applications,” Int. J. Communication Systems, no. 3, pp. 299--316, 2006.
LibreCat: /record/837
DOI: 10.1002/dac.755

J. Gross, H.-Florian Geerdes, H. Karl, and A. Wolisz, “Performance analysis of dynamic OFDMA systems with inband signaling,” IEEE Journal on Selected Areas in Communications, no. 3, pp. 427--436, 2006.
LibreCat: /record/838
DOI: 10.1109/JSAC.2005.862386

E. Carlson, C. Prehofer, C. Bettstetter, H. Karl, and A. Wolisz, “A Distributed End-to-End Reservation Protocol for IEEE 802.11-Based Wireless Mesh Networks,” IEEE Journal on Selected Areas in Communications, no. 11, pp. 2018--2027, 2006.
LibreCat: /record/839
DOI: 10.1109/JSAC.2006.881633

F. Mattern, H. Karl, and K. Römer, “Wireless Sensor Networks,” in Third European Workshop, EWSN 2006, Zurich, Switzerland, February 13-15, 2006, Proceedings, 2006.
LibreCat: /record/840
DOI: 10.1007/11669463

A. Aguiar, A. Wolisz, H. Lederer, and H. Karl, “Channel-Adaptive Schedulers with State-of-the-Art Channel Predictors,” in Proceedings of the 11th European Wireless Conference 2005, 2005.
LibreCat: /record/1843

H. Karl and A. Willig, Protocols and architectures for wireless sensor networks. 2005.
LibreCat: /record/841

J.-P. Ebert, D. Hollos, H. Karl, and M. Löbbers, “Does Multi-Hop Communication Reduce Electromagnetic Exposure?,” Comput. J., no. 1, pp. 72--83, 2005.
LibreCat: /record/842
DOI: 10.1093/comjnl/bxh062

M. Savoric, H. Karl, M. Schläger, T. Poschwatta, and A. Wolisz, “Analysis and performance evaluation of the EFCM common congestion controller for TCP connections,” Computer Networks, no. 2, pp. 269--294, 2005.
LibreCat: /record/843
DOI: 10.1016/j.comnet.2005.01.012

J. Gross, S. Valentin, H. Karl, and A. Wolisz, “A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system,” European Transactions on Telecommunications, no. 1, pp. 37--49, 2005.
LibreCat: /record/844
DOI: 10.1002/ett.1030

H. Karl, T. Lentsch, and H. Ritter, “Drahtlose Sensornetze,” Praxis der Informationsverarbeitung und Kommunikation, no. 2, pp. 66--67, 2005.
LibreCat: /record/845
DOI: 10.1515/PIKO.2005.66

A. Willig and H. Karl, “Data Transport Reliability in Wireless Sensor Networks. A Survey of Issues and Solutions,” Praxis der Informationsverarbeitung und Kommunikation, no. 2, pp. 86--92, 2005.
LibreCat: /record/846
DOI: 10.1515/PIKO.2005.86

A. Kopke, H. Karl, and M. Lobbers, “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, pp. 226--235.
LibreCat: /record/847
DOI: 10.1109/EWSN.2005.1462015

H. Karl, “Ad Hoc Networks,” in The Industrial Information Technology Handbook, 2005, pp. 1--16.
LibreCat: /record/848

S. Valentin, J. Gross, H. Karl, and A. Wolisz, “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.
LibreCat: /record/1013

J. Gross, S. Valentin, H. Karl, and A. Wolisz, “A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system,” European Transactions on Telecommunications, vol. 16, no. 1, pp. 37–49, 2005.
LibreCat: /record/1378
DOI: 10.1002/ett.1030

A. Köpke, H. Karl, and A. Wolisz, “Consensus in WSN – Identifying critical protocol mechanisms,” in GI / ITG Fachgespräche Drahtlose Sensornetzwerke, 2004.
LibreCat: /record/2529

A. Aguiar, H. Karl, and A. Wolisz, “Channel Adaptive Techniques in the Presence of Channel Prediction Inaccuracy,” in Proceedings of European Wireless 2004, Barcelona / Spain , 2004.
LibreCat: /record/1911

J. Gross, J. Klaue, H. Karl, and A. Wolisz, “Cross-layer optimization of OFDM transmission systems for MPEG-4 video streaming,” Computer Communications, no. 11, pp. 1044--1055, 2004.
LibreCat: /record/850
DOI: 10.1016/j.comcom.2004.01.010

N. Niebert et al., “Ambient networks: An architecture for communication networks beyond 3G,” IEEE Wireless Communications, no. 2, pp. 14--22, 2004.
LibreCat: /record/851
DOI: 10.1109/MWC.2004.1295733

V. Handziski, A. Köpke, H. Karl, C. Frank, and W. Drytkiewicz, “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, pp. 172--187.
LibreCat: /record/852
DOI: 10.1007/978-3-540-24606-0_12

V. Typpö, J. Eisl, J. Höller, R. Agüero, and H. Karl, “Research Challenges in Mobility and Moving Networks: An Ambient Networks View,” in Broadband Satellite Comunication Systems and the Challenges of Mobility - IFIP T Workshops on Broadband Satellite Communication Systems and Challenges of Mobility, World Computer Congress, August 22-27, 2004, Toulouse, France, 2004, pp. 145--155.
LibreCat: /record/853
DOI: 10.1007/0-387-24043-8_15

C. Frank and H. Karl, “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, pp. 105--114.
LibreCat: /record/854
DOI: 10.1145/1023663.1023684

L. Marie Feeney, D. Hollos, M. Kubisch, S. Mengesha, and H. Karl, “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-T Networking Conference, Athens, Greece, May 9-14, 2004, Proceedings, 2004, pp. 1312--1317.
LibreCat: /record/855
DOI: 10.1007/978-3-540-24693-0_112

D. Hollos, H. Karl, and A. Wolisz, “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, pp. 819--824.
LibreCat: /record/856
DOI: 10.1109/WCNC.2004.1311292

D. Raguin, M. Kubisch, H. Karl, and A. Wolisz, “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, pp. 1909--1914.
LibreCat: /record/857
DOI: 10.1109/WCNC.2004.1311845