Köpke, A., Holger Karl, and A.  Wolisz. “Consensus in WSN – Identifying Critical Protocol Mechanisms.” In GI / ITG Fachgespräche Drahtlose Sensornetzwerke, 2004.

Aguiar, Ana, Holger Karl, and Adam Wolisz. “Channel Adaptive Techniques in the Presence of Channel Prediction Inaccuracy.” In Proceedings of European Wireless 2004, Barcelona / Spain , 2004.

Gross, James, Jirka Klaue, Holger Karl, and Adam Wolisz. “Cross-Layer Optimization of OFDM Transmission Systems for MPEG-4 Video Streaming.”https://doi.org/10.1016/j.comcom.2004.01.010__Computer Communications, no. 11 (2004): 1044--1055.https://doi.org/10.1016/j.comcom.2004.01.010 .

Niebert, Norbert, Andreas Schieder, Henrik Abramowicz, G. Malmgren, Joachim Sachs, Uwe Horn, Christian Prehofer, and Holger Karl. “Ambient Networks: An Architecture for Communication Networks beyond 3G.”https://doi.org/10.1109/MWC.2004.1295733__IEEE Wireless Communications, no. 2 (2004): 14--22.https://doi.org/10.1109/MWC.2004.1295733 .

Handziski, Vlado, Andreas Köpke, Holger Karl, Christian Frank, and Witold Drytkiewicz. “Improving the Energy Efficiency of Directed Diffusion Using Passive Clustering.”https://doi.org/10.1007/978-3-540-24606-0_12__In Wireless Sensor Networks, First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings, 172--187, 2004.https://doi.org/10.1007/978-3-540-24606-0_12 .

Typpö, Ville, Jochen Eisl, Jan Höller, Ramon Agüero, and Holger Karl. “Research Challenges in Mobility and Moving Networks: An Ambient Networks View.”https://doi.org/10.1007/0-387-24043-8_15__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, 145--155, 2004.https://doi.org/10.1007/0-387-24043-8_15 .

Frank, Christian, and Holger Karl. “Consistency Challenges of Service Discovery in Mobile Ad Hoc Networks.”https://doi.org/10.1145/1023663.1023684__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, 105--114, 2004.https://doi.org/10.1145/1023663.1023684 .

Marie Feeney, Laura, Daniel Hollos, Martin Kubisch, Seble Mengesha, and Holger Karl. “A Geometric Derivation of the Probability of Finding a Relay in Multi-Rate Networks.”https://doi.org/10.1007/978-3-540-24693-0_112__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, 1312--1317, 2004.https://doi.org/10.1007/978-3-540-24693-0_112 .

Hollos, Daniel, Holger Karl, and Adam Wolisz. “Regionalizing Global Optimization Algorithms to Improve the Operation of Large Ad Hoc Networks.”https://doi.org/10.1109/WCNC.2004.1311292__In 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004, 819--824, 2004.https://doi.org/10.1109/WCNC.2004.1311292 .

Raguin, David, Martin Kubisch, Holger Karl, and Adam Wolisz. “Queue-Driven Cut-through Medium Access in Wireless Ad Hoc Networks.”https://doi.org/10.1109/WCNC.2004.1311845__In 2004 IEEE Wireless Communications and Networking Conference , WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004, 1909--1914, 2004.https://doi.org/10.1109/WCNC.2004.1311845 .

Karl, Holger. “Data Transmission in Mobile Communication Systems.” In Location-Based Services, 207--244, 2004.

Karl, Holger, Andreas Willig, and Adam Wolisz, eds. Wireless Sensor Networks. Lecture Notes in Computer Science. First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings, 2004.https://doi.org/10.1007/b94854 .

Niebert, Norbert, Hannu Flinck, Robert Hancock, Holger Karl, and Christian Prehofer. “Ambient Networks--Research for Communication Networks Beyond 3G.” In 13th IST Mobile and Wireless Communications-Summit 2004, 2004.

Gross, James, Irene Paoluzzi, Holger Karl, and Adam Wolisz. “Throughput Study for a Dynamic OFDM-FDMA System with Inband Signaling.” In Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, 1787--1791, 2004.

Klimin, Nikolay, Wilfried Enkelmann, Holger Karl, and Adam Wolisz. “A Hybrid Approach for Location-Based Service Discovery in Vehicular Ad Hoc Networks.” Proc. of WIT, 2004.

Carlson, Emma, Holger Karl, Adam Wolisz, and Christian Prehofer. “Distributed Allocation of Time Slots for Real-Time Traffic in a Wireless Multi-Hop Network.” In Proc. European Wireless, 2004.

Mengesha, Seble, Holger Karl, and Adam Wolisz. “Capacity Increase of Multi-Hop Cellular Wlans Exploiting Data Rate Adaptation and Frequency Recycling.” Proc. of MedHocNet 2004, 2004.

Carlson, Emma, Christian Bettstetter, Holger Karl, Christian Prehofer, and Adam Wolisz. “Distributed Maintenance of Resource Reservation Paths in Multihop 802.11 Networks.” In Vehicular Technology Conference, 2004. V-Fall. 2004 IEEE 60th, 2994--2998, 2004.

Gross, James, Holger Karl, and Adam Wolisz. “On the Effect of Inband Signaling and Realistic Channel Knowledge on Dynamic OFDM-FDMA Systems.” In European Wireless 2004, 2004.

Kubisch, Martin, Holger Karl, and Adam Wolisz. “A MAC Protocol for Wireless Sensor Networks with Multiple Selectable, Fixed-Orientation Antennas.”https://doi.org//10.1.1.3.3185__Frequenz, no. 3–4 (2004): 92--96.https://doi.org//10.1.1.3.3185 .

Gross, James, Holger Karl, and Adam Wolisz. “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.

Handziski, Vlado, Andreas Köpke, Holger Karl, and Adam Wolisz. A Common Wireless Sensor Network Architecture? Berlin, 2003.

Drytkiewicz, Witold , Steffen Sroka, Vlado  Handzisk, Andreas Köpke, and Holger Karl. “A Mobility Frame Work for OMNeT++.” In Proc. of 3rd International OMNeT++ Workshop at Budapest University of Technology and Economics, 2003.

Fu, X., T. Chen, A. Festag, Holger Karl, G. Schäfer, and C. Fan. “Secure, QoS-Enabled Mobility Support for IP-Based Networks.” In Proceedings IP Based Cellular Network Conference IPCN, Paris / France, Dezember , 2003.

Geerdes, Hans-Florian, and Holger Karl. “The Potential of Relaying in Cellular Networks .” In Proceedings of INOC 2003, Evry/Paris, 2003.

Aguiar, Ana, Christian Hoene, Jirka Klaue, Holger Karl, Horst Miesmer, and Adam Wolisz. “Channel-Aware Schedulers for VoIP and MPE Based on Channel Prediction.” In Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03), 2003.

Savoric, Michael, Holger Karl, and Adam Wolisz. “The TCP Control Block Interdependence in Fixed Networks - New Performance Results.”https://doi.org/10.1016/S0140-3664(02)00155-X__Computer Communications, no. 4 (2003): 366--375.https://doi.org/10.1016/S0140-3664(02)00155-X .

Zirwas, Wolfgang, J. Habetha, and Holger Karl. “Ziel-Orientierter Entwurf von Multi-Hop Medienzugriffsprotokollen.”https://doi.org/10.1515/PIKO.2003.184__Praxis Der Informationsverarbeitung Und Kommunikation, no. 4 (2003): 184--189.https://doi.org/10.1515/PIKO.2003.184 .

Aguiar, Ana, Holger Karl, Adam Wolisz, and Horst Miesmer. “A Framework for Evaluating Effects of Channel Prediction Inaccuracy on the Performance of Channel Adaptive Techniques.” In Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, USA, 3--9, 2003.

Gross, James, Holger Karl, Frank H. P. Fitzek, and Adam Wolisz. “Comparison of Heuristic and Optimal Subcarrier Assignment Algorithms.” In Proceedings of the International Conference on Wireless Networks, ICWN ’03, June 23 - 26, 2003, Las Vegas, Nevada, USA, 249--255, 2003.

J. M. Havinga, Paul, Sandro Etalle, Holger Karl, Chiara Petrioli, Michele Zorzi, Harry Kip, and Thomas Lentsch. “EYES - Energy Efficient Sensor Networks.”https://doi.org/10.1007/978-3-540-39867-7_20__In Personal Wireless Communications, IFIP-T 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings, 198--201, 2003.https://doi.org/10.1007/978-3-540-39867-7_20 .

Kubisch, Martin, Holger Karl, and Adam Wolisz. “Are Classes of Nodes with Different Power Amplifiers Good for Wireless Multi-Hop Networks?”https://doi.org/10.1007/978-3-540-39867-7_78__In Personal Wireless Communications, IFIP-T 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings, 841--846, 2003.https://doi.org/10.1007/978-3-540-39867-7_78 .

Köpke, Andreas, Andreas Willig, and Holger Karl. “Chaotic Maps as Parsimonious Bit Error Models of Wireless Channels.”https://doi.org/10.1109/INFCOM.2003.1208702__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, 513--523, 2003.https://doi.org/10.1109/INFCOM.2003.1208702 .

Sroka, Steffen, and Holger Karl. “Performance Evaluation of a QoS-Aware Handover Mechanism.”https://doi.org/10.1109/ISCC.2003.1214110__In Proceedings of the Eighth IEEE Symposium on Computers and Communications (ISCC 2003), 30 June - 3 July 2003, Kiris-Kemer, Turkey, 117--124, 2003.https://doi.org/10.1109/ISCC.2003.1214110 .

Kubisch, Martin, Seble Mengesha, Daniel Hollos, Holger Karl, and Adam Wolisz. “Applying Ad-Hoc Relaying to Improve Capacity, Energy Efficiency, and Immission in Infrastructure-Based WLANs.”https://doi.org/10.1007/978-3-642-55569-5_16__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, 195--206, 2003.https://doi.org/10.1007/978-3-642-55569-5_16 .

Festag, Andreas, Holger Karl, and Adam Wolisz. “Classification and Evaluation of Multicast-Based Mobility Support in All-IP Cellular Networks.”https://doi.org/10.1007/978-3-642-55569-5_19__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, 233--244, 2003.https://doi.org/10.1007/978-3-642-55569-5_19 .

Kubisch, Martin, Holger Karl, Adam Wolisz, Lizhi Charlie Zhong, and Jan M. Rabaey. “Distributed Algorithms for Transmission Power Control in Wireless Sensor Networks.”https://doi.org/10.1109/WCNC.2003.1200410__In 2003 IEEE Wireless Communications and Networking, WCNC 2003, New Orleans, LA, USA, 16-20 March, 2003, 558--563, 2003.https://doi.org/10.1109/WCNC.2003.1200410 .

Drytkiewicz, Witold, Steffen Sroka, Vlado Handziski, Andreas Köpke, and Holger Karl. “A Mobility Framework for Omnet++.” In 3rd International OMNeT++ Workshop, 2003.

Karl, Holger. “An Overview of Energy-Efficiency Techniques for Mobile Communication Systems.” Report of AG Mobikom W, 2003.

Gross, James, Jirka Klaue, Holger Karl, and Adam Wolisz. “Subcarrier Allocation for Variable Bit Rate Video Streams in Wireless OFDM Systems.” In Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, 2481--2485, 2003.

Karl, Holger, Marc Löbbers, and Tim Nieberg. “A Data Aggregation Framework for Wireless Sensor Networks.” In Proc. Dutch Technology Foundation ProRISC Workshop on Circuits, Systems and Signal Processing, 2003.

Klaue, Jirka, James Gross, Holger Karl, and Adam Wolisz. “Semantic-Aware Link Layer Scheduling of Mpeg-4 Video Streams in Wireless Systems.” In 3rd Workshop of Applications and Services in Wireless Networks 2003 (ASWN 2003), 2003.

Neumann, Axel, Xiaoming Fu, and Holger Karl. “Prototype Implementation and Performance Evaluation of a QoS-Conditionalized Handoff Scheme for Mobile IP Networks.” In Computer Communications, 2003. CCW 2003. Proceedings. 2003 IEEE 18th Annual Workshop On, 24--29, 2003.

Aguiar, Ana Cristina Costa, Christian Hoene, Jirka Klaue, Holger Karl, Horst Miesmer, and Adam Wolisz. “Channel-Aware Schedulers For Voip And Mpe For Wireless Communications.” In Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03), 2003.

Karl, Holger, Seble Mengesha, and Daniel Hollos. Relaying in Wireless Access Networks . London: Business Briefing: Wireless Technology 2002, 2002.

Köpke, Andreas, Vlado Handziski, and Holger Karl. “Making Sensor Networks Intelligent.” In Proc. 7th Wireless World Research Forum (WWRF). Eindhoven/Netherlands, 2002.

Miesmer, Horst, Henning Sanneck, Ana Aguier, and Holger Karl. “Concepts for a QoS-Enabled, TCP/IP-Oriented Link Layer in Beyond 3G Networks.” In Proc. of 6th Wireless World Forum. London / GB, 2002.

Hollos, D., and Holger Karl. “A HiperLAN/2 Simulation Model in OMNeT++.” In Proc. of 2nd Intl. OMNet Workshop. Berlin , 2002.

Ngo-Quynh, Thu, Holger Karl, Adam Wolisz, and Klaus Rebensburg. “New Scheduling Algorithm for Providing Proportional Jitter in  Differentiated Service Network .” In Proc. IST Mobile &; Wireless Telecommunications Summit 2002., 2002.

Fu, Xiaoming, Holger Karl, and Cornelia Kappler. “QoS-Conditionalized Handoff for Mobile IP.”https://doi.org/10.1007/3-540-47906-6_58__In NETWORKING 2002, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; and Mobile and Wireless Communications, Second International IFIP-T Networking Conference, Pisa, Italy, May 19-24, 2002, Proceedings, 721--730, 2002.https://doi.org/10.1007/3-540-47906-6_58 .