Publikationen

Timo Lindhorst, Edgar Nett
Dependable communication for mobile robots in industrialwireless mesh networks
In: Cooperative Robots and Sensor Networks 2015. - Cham [u.a.] : Springer International Publ., S. 207-227 - (Studies in Computational Intelligence; 604) ; ISBN: 978-3-319-18299-5 DOI: 10.1007/978-3-319-18299-5_10
http://www.springerprofessional.de/010---dependable-communication-for-mobile-robots-in-industrial-wireless-mesh-networks/5739414.html

Mobile robots inevitably require a wireless network for communication. Wireless mesh networks (WMNs) allow for increased flexibility and an easy integration of mobile robots. Hence, they are well suited for present and future cyber-physical industrial applications. The high dependability requirements of that application domain, however, issue particular challenges to the communication network, especially regarding the mobility of stations. In this chapter, we present various approaches and mechanisms to provide dependable communication for mobile robots in industrial WMNs. These comprise different cross-layer techniques to allow for seamless mobility and an admission control that explicitly considers station mobility to avoid network overload. Evaluation results are gathered by both simulation and real-world experiments while case-studies supplement the results. The outcome is a network architecture that allows for seamless communication even for mission-critical applications on mobile robots.

2014

Timo Lindhorst, Burkhard Weseloh, Edgar Nett
Dependable Admission Control for Mission-Critical Mobile Applications in Wireless Mesh Networks
Proceedings of the 33rd IEEE Symposium on Reliable Distributed Systems

Wireless Mesh Networks (WMNs) provide a promising foundation for a flexible
and reliable communication infrastructure in industrial environments. Meeting
the QoS demands of industrial applications, though, requires the deployment of
an admission control to avoid network overload. The presence of mobile
stations, however, causes dynamics within the network that severely impacts
the available capacity. For instance, if a communication route switches from
one to two hops, twice the resources are consumed due to self-interference. To
neither jeopardize QoS guarantees nor having to cancel present flows, our
dependable admission control scheme foresees and considers those dynamics
during resource reservation to handle station mobility.
We describe a highly dependable approach and further propose an estimation
method that improves network efficiency. The evaluation results show that our
novel approach allows for a dependable admission control even in presence of
mobile stations and thus enables the network to provide a new class of
guarantee for mission-critical mobile applications.

@InProceedings{srds14,
  Title                    = {Dependable Admission Control for Mission-Critical Mobile Applications in Wireless Mesh Networks},
  Author                   = {Timo Lindhorst and Burkhard Weseloh and Edgar Nett},
  Booktitle                = {Proceedings of the 33rd IEEE Symposium on Reliable Distributed Systems},
  Year                     = {2014},
  note = {to appear},
}

Jana Fruth, Edgar Nett
Uniform Approach of Risk Communication in Distributed IT Environments Combining Safety and Security Aspects
Kongressband, Computer Safety, Reliability, and Security - SAFECOMP 2014 Workshop-Proceedings, s. 298-300, September 8-12, 2014, Florence, Italy

The trend to compose real time systems with standard IT known from conventional office domains results in heterogeneous technical environments. Examples are modern industrial process automation networks. It is a challenging task, because of potential impacts of security incidents to the system safety. For example, robot control units could be manipulated by malicious codes. The term “risk communication” is introduced, to describe alarm communication in human-machine
interaction scenarios. User adapted risk communication between humans and industrial automation systems, including home robotics, can prevent hazards and/or threats to the entire system safety and security. Current safety and security risk communication standards are compared to examine the adequacy for our uniform approach. This paper focuses on alarm
system standards in the industrial process automation domain and intrusion detection systems from the conventional desktop IT domain. A uniform model based approach for risk communication in distributed IT environments is introduced.

Timo Lindhorst, Burkhard Weseloh, Edgar Nett
Maintaining Dependable Communication Service for Mobile Stations in Wireless Mesh Networks by Tracking Capacity Demands
Proceedings of the 28th IEEE International Parallel & Distributed Processing Symposium

@InProceedings{Lindhorst14dpdns,
  Title                    = {Maintaining Dependable Communication Service for Mobile Stations in Wireless Mesh Networks by Tracking Capacity Demands},
  Author                   = {Timo Lindhorst and Burkhard Weseloh and Edgar Nett},
  Booktitle                = {Proceedings of the 28th IEEE International Parallel \& Distributed Processing Symposium},
  Year                     = {2014},
  Publisher                = {IEEE}
}

2013

Henning Trsek, Tim Tack, Omid Givehchi, Juergen Jasperneite, and Edgar Nett
Towards an Isochronous Wireless Communication System for Industrial Automation
18th IEEE International Conference on Emerging Technologies and Factory Automation, September 10-13, 2013 Cagliary, Italy

Deploying wireless technologies in industrial automation becomes more and more common. It is an enabler for many innovative applications where moving system components are involved, e. g. rotating parts of machines. However, many of such applications impose high temporal requirements on the wireless system, for instance isochronous data communication. Today, these requirements can not be met by existing solutions, such as IEEE 802.11 Wireless Local Area Networks (WLANs). In this paper, an isochronous wireless communication system is investigated. It mainly consists of a deterministic medium access control, based on IEEE 802.11, which is extended with additional features for isochronous communication. The presented preliminary analysis shows the system’s feasibility for the targeted industrial applications and presents promising performance improvements in comparison with standard mechanisms.

Timo Lindhorst, Georg Lukas, Edgar Nett
Wireless Mesh Network Infrastructure for Industrial Applications - A Case Study of Tele-operated Mobile Robots
18th IEEE International Conference on Emerging Technologies and Factory Automation, September 10-13, 2013 Cagliary, Italy

The deployment of wireless communication networks in industrial facilities allows for increased flexibility and seamless integration of mobile participants. Time-critical control applications are generally realized with dedicated wireless sensor networks while common WLAN infrastructure networks allow high-throughput best-effort communication. To provide high-capacity communication as well as real-time service quality, we developed and implemented a Wireless Mesh Network (WMN) infrastructure for industrial applications. An example application that requires these properties is the video-based tele-operation of a mobile robot, which we present as case study in this work. It shows the applicability of our infrastructure as well as the necessity of its comprised components.

@INPROCEEDINGS{Lindhorst13,
  author = {Timo Lindhorst, Georg Lukas and Edgar Nett},
  title = {Wireless Mesh Network Infrastructure for Industrial Applications
        - A Case Study of Tele-operated Mobile Robots},
  booktitle = {18th IEEE International Conference on Emerging Technologies \& Factory
        Automation (ETFA)},
  year = {2013},
  file = {:Lindhorst13.pdf:PDF},
  owner = {timo},
  timestamp = {2013.09.18}
}

Frank Engelhardt, Timo Lindhorst, Edgar Nett
Tolerating Packet Losses in Wireless Mesh Networks
2013 IEEE 27th International Symposium on Parallel & Distributed Processing Workshops and PhD Forum, 20-24 May 2013, Boston (MA) USA

Wireless Mesh Networks (WMNs) provide a promising foundation for a flexible and reliable communication infrastructure in industrial environments. Meeting the QoS demands of real-time applications, though, requires the deployment of various advanced mechanisms. Compared to wired networks, applications face higher packet loss rates in wireless networks due to the inherent unreliability of wireless communication. Furthermore, if mobile stations are involved, links that fail due to node movement frequently cause packet losses. In this paper, we present an approach to tolerate those specific losses by locally recovering lost packets and transiently re-routing them over an alternative path. The evaluation in real-world experiments shows that we can completely prevent packet loss without significantly increasing the end-to-end latency. This allows the deployment of WMNs for real-time applications without explicitly considering the increased error-proneness of wireless communication and station mobility.

Svilen Ivanov, Edgar Nett
Localization-Based Radio Model Calibration for Fault-Tolerant Wireless Mesh Networks
Industrial Informatics, IEEE Transactions on , vol.9, no.1, pp.246-253, Feb. 2013

2012

Svilen Ivanov, Edgar Nett
Achieving Fault-Tolerant Network Topology in Wireless Mesh Networks (Buchkapitel)
Wireless Mesh Networks - Efficient Link Scheduling, Channel Assignment and Network Planning Strategies, ISBN: 978-953-51-0672-2 ; DOI: 10.5772/50173
http://www.intechopen.com/articles/show/title/achieving-fault-tolerant-network-topology-in-wireless-mesh-networks

Christian Zöllner, Manuela Kanneberg
Ego.tech-on: entrepreneurship and technology education for young people (Talk)
International Entrepreneurship Education Conference (IEEC 2012), Plymouth, UK, 14. September 2012

B. Malinowsky, J. Grønbæk, H.P. Schwefel, A. Ceccarelli, A. Bondavalli, E. Nett
Timed Broadcast via Off-the-Shelf WLAN Distributed Coordination Function for Safety-Critical Systems
In Proceedings of 9th European Dependable Computing Conference (EDCC 2012), Seite 144-155, Sibiu, Romania, 08-11.Mai 2012
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6214769

Svilen Ivanov, Edgar Nett
Using Localization for Fault-tolerant Radio Coverage in Wireless Mesh Networks
In Proceedings of 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS 2012), 17th IEEE Workshop on Dependable Parallel, Distributed and Network-Centric Systems (DPDNS 2012), Shanghai, China, 21-25. Mai 2012

2011

Timo Lindhorst, Georg Lukas and Edgar Nett
Modeling Medium Utilization for Admission Control in Industrial Wireless Mesh Networks
In Proceedings of the 30th IEEE International Symposium on Reliable Distributed Systems, October 4-7, 2011. Madrid, Spain

[BibTeX]

@inproceedings{Lukas2011srds,
  author = {Georg Lukas and Timo Lindhorst and Edgar Nett},
  title = {Modeling Medium Utilization for Admission Control in Industrial Wireless Mesh Networks},
  booktitle = {IEEE International Symposium on Reliable Distributed Systems},
  publisher = {IEEE},
  year = {2011}
}

Frank Engelhardt
Umsetzung eines Online-SLAM-Verfahrens auf der Roboterplattform VolksBot-Lab
In Informatik aktuell: Herausforderungen durch Echtzeitbetrieb - Echtzeit 2011, Fachtagung des GI/GMA - Fachausschusses Echtzeitsysteme, Boppard, November 3.-4., 2011; Springer

Frank Engelhardt, Timo Lindhorst and Ansgar Bredenfeld
Umsetzung eines Online-SLAM-Verfahrens auf der Roboterplattform VolksBot-Lab
In Virtuelle Instrumente in der Praxis 2011, Messtechnik Automatisierung Begleitband zum 16. VIP-Kongress, 24.-25. Oktober 2011, VDE Verlag.

Kurzfassung
Die Fähigkeit eines autonomen mobilen Roboters, während der Fahrt seine Umgebung zu kartieren, eröffnet ihm ein weites Spektrum von Anwendungen. In dieser Arbeit wird ein Online-SLAM-Verfahren präsentiert, das auf dem cRIO-Echtzeitsystem des Roboters VolksBot-Lab lauffähig ist und bei Indoor-Szenarien sowohl im Zeitverhalten als auch in der Kartenqualität sehr zuverlässige Ergebnisse liefert. Das Robotersystem kommt derzeit im Rahmen einer Lehrveranstaltung der Universität Magdeburg zum Einsatz.

Abstract
The ability of an autonomous mobile robot to explore and map its environment during operation opens a variety of applications. In this paper we present an online-SLAM solution, which runs on the cRIO realtime controller of the robot VolksBot-Lab. It provides reliable results in both its map quality and timing behavior concerning indoor scenarios. The robot is currently used within the scope of a student project at the University of Magdeburg.

@inproceedings{VIP2011,
  author = {Frank Engelhardt and Timo Lindhorst and Ansgar Bredenfeld},
  title = {{Umsetzung eines Online-SLAM-Verfahrens auf der Roboterplattform VolksBot-Lab}},
  booktitle = {{Virtuelle Instrumente in der Praxis 2011}},
  publisher = {VDE Verlag},
  year = {2011},
  month = {September}
}

Georg Lukas
Wireless-Mesh-Network-Infrastruktur mit Ende-zu-Ende-Dienstgütegarantien
In KOMMA 2011, 2. Jahreskolloquium Kommunikation in der Automation, 27.-28. September 2011, Magdeburg, Germany

[Abstract] [BibTeX] [PDF]

Drahtlose Kommunikation spielt eine immer größere Rolle in industriellen Anwendungen. Gleichzeitig erfordern es diese Anwendungen aber, dass das Netzwerk Ende-zu-Ende-Dienstgüte garantieren und umsetzen kann. Drahtlose vermaschte Netzwerke (Wireless Mesh Networks, WMN) sind hervorragend für die Flexibilitätsanforderungen gerüstet, bieten aber keine inhärente Dienstgüte. In dieser Arbeit werden Methoden der Fehlertoleranz angewendet, um eine für industrielle Anwendungen geeignete WMN-Infrastruktur bereitzustellen. Die Infrastruktur wird vorgestellt und in Teilen evaluiert, um die Praxistauglichkeit des Ansatzes zu belegen.

@inproceedings{Lukas2011komma,
  author = {Georg Lukas},
  title = {{Wireless-Mesh-Network-Infrastruktur mit Ende-zu-Ende-Dienstgutegarantien}},
  booktitle = {Kommunikation in der Automation},
  year = {2011},
  volume = {2}
}

2010

Stefan Werner Knoll, Till Plumbaum, Jan Leif Hoffmann, and Ernesto William De Luca
Collaboration Ontology: Applying Collaboration Knowledge to a Generic Group Support System
In Proceedings of the 11th Conference on Group Decision and Negotiation (GDN), June 21st-23rd, 2010, Delft, the Netherlands

Collaboration is a social and interactive process, where participants join efforts toward a group goal. A Group Support Systems (GSS) can improve the productivity of collaboration work by structuring activities and improving communication. However, knowledge is needed for the faithful appropriation of the GSS technology. In this paper we present ongoing research about a supporting framework for a generic GSS that adapts the GSS technology automatically to a logical model of a collaboration process. Drawing on Collaboration Engineering and the logical model, the paper explore the use of an ontology to capture and share knowledge about collaboration. As a result, we present a collaboration ontology that builds a common vocabulary for the key concept of collaboration and the relations and dependencies between them. A generic GSS can use the ontology to enable knowledge exchange between experts and practitioners. This will increase the potential benefits of a GSS for collaboration.

@inproceedings{cite:GDN2010,
  author = {Stefan Werner Knoll and Till Plumbaum and Jan Leif Hoffmann and Ernesto William De Luca},
  title = {Collaboration Ontology: Applying Collaboration Knowledge to a Generic Group Support System},
  booktitle = {Proceedings of the 11th meeting on Group Decision and Negotiation (GDN2010)},
  year = {2010},
}

Timo Lindhorst, Georg Lukas, Edgar Nett, and Michael Mock
Data-mining-based Link Failure Detection for Wireless Mesh Networks
In Proceedings of the 29th IEEE International Symposium on Reliable Distributed Systems, 31 October - 4 November, 2010, New Delhi, India

[Abstract] [BibTeX] [PDF]

Mobile robot applications operating in wireless environments require fast detection of link failures in order to enable fast repair. In previous work, we have shown that cross-layer failure detection can reduce failure detection latency significantly. In particular, we monitor the behavior of the WLAN MAC layer to predict failures on the link layer. In this paper, we investigate data mining techniques to determine which parameters, i.e., the events, or combination and timing of events, occurring on the MAC layer most probably lead to link failures. Our results show, that the parameters revealed with the data mining approach produce similar or even more accurate failure predictions than achieved so far.

@inproceedings{Lindhorst2010-srds,
  author = {Timo Lindhorst and Georg Lukas and Edgar Nett and Michael Mock},
  title = {Data-mining-based Link Failure Detection for Wireless Mesh Networks},
  booktitle = {IEEE International Symposium on Reliable Distributed Systems},
  publisher = {IEEE},
  year = {2010},
  month = {November}
}

Svilen Ivanov and Edgar Nett
Fault-tolerant Base Station Planning ofWireless Mesh Networks in Dynamic Industrial Environments
In Proceedings of the IEEE International Conference 2010 - Emerging Technologies and Factory Automation, 13 - 16 Semptember, 2010, Bilbao, Spain

Ansgar Bredenfeld, Manuela Kanneberg, Timo Lindhorst, and Edgar Nett
Im Praxistest
In A&D Vorsprung Automation, November 2010, München, pp. 120-122

[Abstract] [BibTeX] [PDF]

Die Universität Magdeburg bietet Informatikstudenten die Möglichkeit, in Software-Projekten die Theorie in die Praxis umzusetzen. Das Projekt Teamrobotik vermittelte so anhand von mobilen VolksBot-RT3-Robotern unter anderem Erfahrungen im Bereich Bildverarbeitung, Navigation und Hinderniserkennung.

@article{praxistestAD,
  author = {Ansgar Bredenfeld and Timo Lindhorst and Manuela Kanneberg and Edgar Nett},
  title = {Im Praxistest},
  journal = {A\&D Vorsprung Automation},
  year = {2010},
  volume = {November},
  pages = {120-122}
}

Svilen Ivanov, Scholz R., Schemmer S. and Schumann R.
Informationssicherheit mit Standardtechnologien: Referenzmodell für risikobasierte Maßnahmenauswahl
atp edition -- Automatisierungstechnische Praxis *7-8*, 222--225.

Svilen Ivanov and Adamczyk, H.
Lebenszyklusorientiertes Risikomanagement in COTS-basierten Systemen
in VDI-Expertenforum "IT Security in der Automation - Verstehen und Handeln!", Frankfurt, Germany

Timo Lindhorst, Georg Lukas, and Edgar Nett
Modeling Fast Link Failure Detection for Dependable Wireless Mesh Networks
In Proceedings of the 9th IEEE International Symposium on Network Computing and Applications, 15 - 17 July, 2010, Cambridge, MA, USA

[Abstract] [BibTeX] [PDF]

Wireless Mesh Networks (WMN) provide a flexible and inexpensive way to expand network applications to mobile entities. However, high communication reliability demands can not be met by regular WMNs due to mobility and inherent properties of wireless communication. Failing links are common events which impose a major challenge for providing a dependable communication service. By the use of suitable cross-layer models, we provide a timely detection of failed links without compromising the network stability. It is shown that the packet loss caused by a link failure can be reduced from a time-dependent value to at most four consecutive packets. For a typical control application this means an improvement by a factor of 100. In addition to an empirical evaluation we demonstrate the applicability of the mechanism by utilizing it in a real-world WMN to allow the tele-operation of a mobile robot.

@inproceedings{Lindhorst2010,
  author = {Timo Lindhorst and Georg Lukas and Edgar Nett},
  title = {Modeling Fast Link Failure Detection for Dependable Wireless Mesh Networks},
  booktitle = {IEEE International Symposium on Network Computing and Applications},
  publisher = {IEEE},
  year = {2010},
  month = {July},
  doi = {http://doi.ieeecomputersociety.org/10.1109/NCA.2010.13}
}

Svilen Ivanov, Scholz R., Schemmer S. and Schumann R.
Security in der drahtlosen Automatisierung: Ein Referenzmodell hilft bei der risikobasierten Maßnahmenauswahl
in VDI Kongress Automation, Baden-Baden, Germany

Timo Lindhorst, Manuela Kanneberg, Edgar Nett and Ansgar Bredenfeld
VolksBot mit CompactRIO und LabVIEW - Erfahrungen aus der Lehrveranstaltung "Teamrobotik"
15. Technologie- und Anwenderkongress VIP 2010 - „Virtuelle Instrumente in der Praxis“ ; 27.-28. Oktober 2010, Fürstenfeld bei München, Germany

[BibTeX]

@inproceedings{VIP2010,
  author = {Ansgar Bredenfeld and Timo Lindhorst and Manuela Kanneberg and Edgar Nett},
  title = {VolksBot mit CompactRIO und LabVIEW - Erfahrungen aus der Lehrveranstaltungsreihe "Teamrobotik"},
  booktitle = {Virtuelle Instrumente in der Praxis 2010},
  publisher = {VDE Verlag},
  year = {2010},
  month = {October}
}

2009

Georg Lukas, André Herms, Svilen Ivanov, E. Nett
Dependable Wireless Mesh Networks: An integrated approach
International Journal of parallel, Emergent and Distributed Systems, April 2, 2009
Volume 24, Issue 2 April 2009, pages 151-169

[Abstract] [BibTeX] [PDF]

Wireless Mesh Networks (WMNs) are gaining popularity in many application areas because of their low cost and high flexibility. Technically, a WMN forms a distributed network-centric system which aims to provide communication services to the application layer, but has no built-in dependability provisions. To make the network dependable, many problems have to be solved on different layers. With this paper, we describe our ongoing work to provide an integrated solution to increase the dependability of WMNs. Our approach combines network coverage planning on the physical layer, bandwidth management on the link layer and live network monitoring to improve the reliability, availability and maintainability of a WMN. We provide fine-grained means to improve the predictability of the network components, thus making the WMN more dependable. In this paper, we present first results of our work, and describe how they are interleaved.

@article{cite:Lukas2009,
  author = {Georg Lukas and Andr{\'e} Herms and Svilen Ivanov and Edgar Nett},
  title = {{Dependable Wireless Mesh Networks: An Integrated Approach}},
  journal = {International Journal of Parallel, Emergent and Distributed Systems},
  year = {2009},
  month = {April},
  volume = {24},
  number = {2},
  pages = {1--21},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2009/ijpeds\_lhin2009.pdf},
  doi = {10.1080/17445760802544086}
}

Michael Schulze, Georg Lukas
MLCCA - Multi-Level Composability Check Architecture for Dependable Communication over Heterogeneous Networks
In Proceeding of the 14th International Conference on Emerging Technologies and Factory Automation (ETFA 2009), IEEE, Mallorca, Spain, September, 22-26, 2009

[Abstract] [BibTeX] [PDF]

During the design of complex networked systems, it is cruical to ensure the composability of the deployed applications and network protocols. Special care has to be taken to provide non-functional requirements like bandwidth and latency. Existing solutions only tackle this problem during the design phase; later refactoring or added components are not covered, potentially causing QoS violations. We propose MLCCA, a multi-level architecture which complements the design-time composability checks with additional automatic checks performed at compile-time and at run-time. The required infrastructure is embedded into our communication middleware FAMOUSO, making it transparent to application developers. The architecture has been evaluated in a tele-operated mobile robot case study. If the QoS attributes could not be fulfilled due to refactoring or changed conditions, no communication was allowed by the middleware, ensuring that the application could enter a fail-safe state. No data was sent over insufficient channels. Thus, our combination of FAMOUSO and MLCCA enables the sustainable deployment of complex networked systems.

@inproceedings{cite:Schulze2009b,
  author = {Michael Schulze and Georg Lukas},
  title = {{MLCCA -- Multi-Level Composability Check Architecture for Dependable Communication over Heterogeneous Networks}},
  booktitle = {{14th International Conference on Emerging Technologies and Factory Automation (ETFA 2009)}},
  address = {Mallorca, Spain},
  year = {2009},
  month = {September},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2009/mlcca_schulze_lukas_2009.pdf}
}

Timo Lindhorst
Schichtübergreifende Früherkennung von Verbindungsausfällen in drahtlosen Mesh-Netzwerken
In Informatik aktuell: Software-intensive verteilte Echtzeitsysteme - Echtzeit 2009, Wolfgang A. Halang, Peter Holleczek (Hrsg.);
Fachtagung des GI/GMA - Fachausschusses Echtzeitsysteme, Boppard, November 19-20, 2009;
ISBN 978-3-642-04782-4, Springer-Verlag

Drahtlose Mesh-Netzwerke (WMNs) bilden aufgrund ihrer Selbstorganisation ein flexibles Kommunikationssystem. Bei der Erkennung einzelner Verbindungsausfälle, die bei der Integration mobiler Teilnehmer unvermeidbar sind, ist bei aktuellen Routingprotokollen die Kommunikation jedoch für mehrere Sekunden unterbrochen. In dieser Arbeit wird gezeigt, wie durch Nutzung von Informationen aus der MAC-Schicht ein Ausfall frühzeitig erkannt und dadurch die Anzahl der Paketverluste von mehreren Hundert auf maximal vier reduziert werden kann. Hierdurch wird die Zuverlässigkeit und Verfügbarkeit von WMNs erhöht und ihr Einsatz für Echtzeit-Anwendungen ermöglicht.

@inproceedings{cite:xalf-boppard09,
  author = {Timo Lindhorst},
  title = {Schichtübergreifende Früherkennung von Verbindungsausfällen in drahtlosen Mesh-Netzwerken},
  booktitle = {Software-intensive verteilte Echtzeitsysteme - Echtzeit 2009},
  publisher = {Springer},
  year = {2009},
  month = {November},
  pages = {67 ff.}
}

Georg Lukas, Christian Fackroth
WMNSec - Security for Wireless Mesh Networks
Proceedings of the 2009 - IWCMC - International Wireless Communications & Mobile Computing, Germany - Leipzig, June 21-24, 2009

[Abstract] [BibTeX] [PDF]

Wireless Mesh Networks (WMNs) are gaining popularity as a flexible and inexpensive replacement for Ethernet-based infrastructure. However, WMN security has not been covered adequately by existing standards and implementations. We propose WMNSec, an adaptation of the IEEE 802.11i security standard, specifically targeted at Wireless Mesh Networks and accounting for limited CPU power, node mobility and interruption-free connectivity. WMNSec has been implemented on top of the MadWifi Linux driver and the hostapd suite. Experimental results from a real WMN show that even in a small eight-node network, WMNSec reduces the authentication time by up to a factor of 3 compared to 802.11i, while allowing mobile stations to move without performing additional authentications. The reduced overhead and the mobility feature confirm the practical usability of WMNSec, finally allowing to deploy WMNs in a secure way.

@inproceedings{cite:Lukas2009wmnsec,
  author = {Georg Lukas and Christian Fackroth},
  title = {{WMNSec -- Security for Wireless Mesh Networks}},
  booktitle = {IWCMC 2009 Computer and Network Security Symposium},
  year = {2009},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2009/wmnsec_lukas2009.pdf}
}

2008