Karl H, Willig A. Protocols and Architectures for Wireless Sensor Networks.; 2005.

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

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

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

Karl H, Lentsch T, Ritter H. Drahtlose Sensornetze. Praxis der Informationsverarbeitung und Kommunikation. 2005;(2):66--67. doi:10.1515/PIKO.2005.66

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

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

Karl H. Ad Hoc Networks. In: The Industrial Information Technology Handbook. ; 2005:1--16.

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.

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

Köpke A, Karl H, Wolisz A. Consensus in WSN – Identifying critical protocol mechanisms. In: GI / ITG Fachgespräche Drahtlose Sensornetzwerke. ; 2004.

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.

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

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

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

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 T 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

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

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-T Networking Conference, Athens, Greece, May 9-14, 2004, Proceedings. ; 2004:1312--1317. doi:10.1007/978-3-540-24693-0_112

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

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

Karl H. Data Transmission in Mobile Communication Systems. In: Location-Based Services. ; 2004:207--244.

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

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.

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.

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.

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.

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.

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. V-Fall. 2004 IEEE 60th. ; 2004:2994--2998.

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.

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

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.

Handziski V, Köpke A, Karl H, Wolisz A. A Common Wireless Sensor Network Architecture? Berlin; 2003.

Drytkiewicz W, Sroka S, Handzisk V, Köpke A, Karl H. A Mobility Frame work for OMNeT++. In: Proc. of 3rd International OMNeT++ Workshop at Budapest University of Technology and Economics. ; 2003.

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

Geerdes H-F, Karl H. The Potential of Relaying in Cellular Networks . In: Proceedings of INOC 2003, Evry/Paris. ; 2003.

Aguiar A, Hoene C, Klaue J, Karl H, Miesmer H, Wolisz A. 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 M, Karl H, Wolisz A. The TCP control block interdependence in fixed networks - new performance results. Computer Communications. 2003;(4):366--375. doi:10.1016/S0140-3664(02)00155-X

Zirwas W, Habetha J, Karl H. Ziel-orientierter Entwurf von Multi-hop Medienzugriffsprotokollen. Praxis der Informationsverarbeitung und Kommunikation. 2003;(4):184--189. doi:10.1515/PIKO.2003.184

Aguiar A, Karl H, Wolisz A, Miesmer H. 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. ; 2003:3--9.

Gross J, Karl H, H. P. Fitzek F, Wolisz A. 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. ; 2003:249--255.

J. M. Havinga P, Etalle S, Karl H, et al. EYES - Energy Efficient Sensor Networks. In: Personal Wireless Communications, IFIP-T 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings. ; 2003:198--201. doi:10.1007/978-3-540-39867-7_20

Kubisch M, Karl H, Wolisz A. Are Classes of Nodes with Different Power Amplifiers Good for Wireless Multi-hop Networks? In: Personal Wireless Communications, IFIP-T 8th International Conference, PWC 2003, Venice, Italy, September 23-25, 2003, Proceedings. ; 2003:841--846. doi:10.1007/978-3-540-39867-7_78

Köpke A, Willig A, Karl H. Chaotic Maps as Parsimonious Bit Error Models of Wireless Channels. 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. ; 2003:513--523. doi:10.1109/INFCOM.2003.1208702

Sroka S, Karl H. Performance Evaluation of a QoS-Aware Handover Mechanism. In: Proceedings of the Eighth IEEE Symposium on Computers and Communications (ISCC 2003), 30 June - 3 July 2003, Kiris-Kemer, Turkey. ; 2003:117--124. doi:10.1109/ISCC.2003.1214110

Kubisch M, Mengesha S, Hollos D, Karl H, Wolisz A. Applying ad-hoc relaying to improve capacity, energy efficiency, and immission in infrastructure-based WLANs. 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. ; 2003:195--206. doi:10.1007/978-3-642-55569-5_16

Festag A, Karl H, Wolisz A. Classification and Evaluation of Multicast-Based Mobility Support in All-IP Cellular Networks. 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. ; 2003:233--244. doi:10.1007/978-3-642-55569-5_19

Kubisch M, Karl H, Wolisz A, Charlie Zhong L, M. Rabaey J. Distributed algorithms for transmission power control in wireless sensor networks. In: 2003 IEEE Wireless Communications and Networking, WCNC 2003, New Orleans, LA, USA, 16-20 March, 2003. ; 2003:558--563. doi:10.1109/WCNC.2003.1200410

Drytkiewicz W, Sroka S, Handziski V, Köpke A, Karl H. A mobility framework for omnet++. In: 3rd International OMNeT++ Workshop. ; 2003.

Karl H. An overview of energy-efficiency techniques for mobile communication systems. Report of AG Mobikom W. 2003.

Gross J, Klaue J, Karl H, Wolisz A. Subcarrier allocation for variable bit rate video streams in wireless OFDM systems. In: Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th. ; 2003:2481--2485.

Karl H, Löbbers M, Nieberg T. A data aggregation framework for wireless sensor networks. In: Proc. Dutch Technology Foundation ProRISC Workshop on Circuits, Systems and Signal Processing. ; 2003.

Klaue J, Gross J, Karl H, Wolisz A. 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 A, Fu X, Karl H. 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. ; 2003:24--29.

Aguiar ACC, Hoene C, Klaue J, Karl H, Miesmer H, Wolisz A. Channel-Aware Schedulers For Voip And Mpe For Wireless Communications. In: Proc. of 8th Intl. Workshop on Mobile Multimedia Communications (MoMuC’03). ; 2003.

Karl H, Mengesha S, Hollos D. Relaying in Wireless Access Networks . London: Business Briefing: Wireless Technology 2002; 2002.

Köpke A, Handziski V, Karl H.  Making sensor networks intelligent. In: Proc. 7th Wireless World Research Forum (WWRF). Eindhoven/Netherlands; 2002.

Miesmer H, Sanneck H, Aguier A, Karl H. 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, Karl H. A HiperLAN/2 simulation model in OMNeT++. In: Proc. of 2nd Intl. OMNet Workshop. Berlin ; 2002.

Ngo-Quynh T, Karl H, Wolisz A, Rebensburg K. New Scheduling Algorithm for Providing Proportional Jitter in  Differentiated Service Network . In: Proc. IST Mobile &; Wireless Telecommunications Summit 2002. ; 2002.

Fu X, Karl H, Kappler C. QoS-Conditionalized Handoff for Mobile IP. 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. ; 2002:721--730. doi:10.1007/3-540-47906-6_58

Hollos D, Karl H. A protocol extension to HiperLAN/2 to support single-relay networks. In: Mobile Ad-Hoc Netzwerke, 1. Deutscher Workshop Über Mobile Ad-Hoc Netzwerke WMAN 2002, 25.-26. März 2002 in Ulm. ; 2002:91--107.

Xing W, Karl H, Wolisz A, Müller H. M-SCTP: Design and prototypical implementation of an end-to-end mobility concept. In: In Proc. 5th Intl. Workshop The Internet Challenge: Technology and Applications. ; 2002:43.

Quynh TN, Karl H, Wolisz A, Rebensburg K. Using only Proportional Jitter Scheduling at the boundary of a Differentiated Service Network: simple and efficient. In: Universal Multiservice Networks, 2002. ECUMN 2002. 2nd European Conference On. ; 2002:116--123.

Sroka S, Karl H. Using akaro with omnet++. In: 2nd International OMNeT++ Workshop, Berlin, Germany. ; 2002.

Ngo-Quynh T, Karl H, Wolisz A, Rebensburg K. New scheduling algorithm for providing proportional jitter in differentiated services network. Proceedings of IST mobile communication and wireless telecommunications summit, Thessaloniki, Greece. 2002.

Aguiar A, Karl H, Wolisz A. Effects of prediction inaccuracy on the performance of channelstate-aware link layer schedulers. In: Proc. of 1st Intl. Conf. on Mobile and Ubiquitous Multimedia. ; 2002:21--33.

Karl H. Relaying in Wireless Access Networks –   A Capacity and Energy-Efficiency Perspective . In: Proc. Wireless World Research Forum Kickoff Meeting (WWRF). München; 2001.

Karl H. Relaying ñ bad for energy,  good for capacity? In: Rom/Italy: Eork-in-progress session of mobicom 2001; 2001.

Karl H, Hentschel T. IBMS 2 - Integriertes Bandbreiteneffizientes Mobiles Software-Radio System. In: Zukunftsperspektiven Der Mobilkommunikation, Symposium Bundesministerium Für Bildung Und Forschung. ; 2001.

Mengesha S, Karl H, Wolisz A. Improving Goodput by Relaying in Transmission-Power-Limited Wireless Systems. In: GI Jahrestagung (1). ; 2001:537--544.

Karl H, Mengesha S. Analysing capacity improvements in wireless networks by relaying. In: Proc. of IEEE Intl. Conf. on Wireless LANs and Home Networks. ; 2001:339--348.

Quynh T, Karl H, Wolisz A, Rebensburg K. Relative jitter packet scheduling for differentiated services. In: Proc. 9th IFIP Conf. Perf. Modeling and Eval. of ATM &; IP Networks. ; 2001.

Quynh TN, Karl H, Wolisz A, Rebensburg K. The influence of proportional jitter and delay on end to end delay in differentiated service network. In: Network Computing and Applications, 2001. NCA 2001. IEEE International Symposium On. ; 2001:354--357.

Karl H, Polze A, Werner M. Predictable Network Computing using Message-driven Scheduling. In: Proc. the Workshop on Run-Time Systems for Parallel Programming. ; 2000.

Karl H. Towards Quality of Service for Parallel Computing: An Overview of the MILAN Project. In: High-Performance Computing and Networking, 7th International Conference, HPCN Europe 1999, Amsterdam, The Netherlands, April 12-14, 1999, Proceedings. ; 1999:841--850. doi:10.1007/BFb0100644

Karl H. Coscheduling through Synchronized Scheduling Servers -- A Prototype and Experiments. 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. ; 1999:1115--1129. doi:10.1007/BFb0097997

Karl H. Bridging the gap between distributed shared memory and message passing. Concurrency - Practice and Experience. 1998;(11-13):887--900. doi:10.1002/(SICI)1096-9128(199809/11)10:11/13&#38;#60;887::AID-CPE416&#38;#62;3.0.CO;2-0

Baratloo A, Karaul M, Karl H, M. Kedem Z. An infrastructure for network computing with Java applets. Concurrency -- Practice and Experience. 1998;(11-13):1029--1041. doi:10.1002/(SICI)1096-9128(199809/11)10:11/13&#38;#60;1029::AID-CPE412&#38;#62;3.0.CO;2-U

Karl H, Werner M, Küttner L. Experimental investigation of message latencies in the Totem protocol in the Presence of faults. IEEE Proceedings -- Software. 1998;(6):219--227. doi:10.1049/ip-sen:19982443

Karl H, Werner M, Kuttner L. An Experimental Investigation of Message Latencies in the Totem Protocol in the Presence of Faults. In: 24th EUROMICRO ’98 Conference, Engineering Systems and Software for the Next Decade, 25-27 August 1998, Vesteras, Sweden. ; 1998:10468--10475. doi:10.1109/EURMIC.1998.711841

Karl H, Werner M. An optimal checkpointing interval for real-time systems. In: Proc. Intl. Conf. Parallel and Distributed Processing Techniques and Applications. ; 1998:604--612.

Baratloo A, Karaul M, Karl H, Kedem ZM. KnittingFactory: An Infrastructure for Distributed Web Applications. Technical Report. 1997.

Dreier B, Huber A, Zahn M, Karl H, Ungerer T. ReGTime - Rent Gigaflops someTimes. In: Proceedings Trends in Distributed Systems. ; 1996.

Dreier B, Huber A, Karl H, Ungerer T, Zahn M. ReGTime - Rent Gigaflops someTimes. In: Trends in Distributed Systems: CORBA and Beyond, International Workshop TreDS ’96, Aachen, Germany, October 1-2, 1996, Proceedings. ; 1996:84--93. doi:10.1007/3-540-61842-2_28