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Publikationen von Professorinnen und Professoren der HAW Hamburg

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Referenzen

2018

Tagungs-/Konferenz-/Katalogbeiträge:

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Thomas Bauer, Christoph Cewe, Fariba Fazli, Kathrin Kirchner, Robert Mertens, Felix Reher und Rüdiger Weißbach
Digitalisierung im Geschäftsprozessmanagement: Potentiale und Herausforderungen
INFORMATIK 2018
Berlin
28.09.2018
Carsten Brockmann Christian Czarnecki (Hrsg.) Workshops der INFORMATIK 2018 - Architekturen, Prozesse, Sicherheit und Nachhaltigkeit Band P-285 aus LNI , Seite 280-293.
Gesellschaft für Informatik
Verlag: Köllen, Bonn

Marker: W

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Sebastian Szancer, Philipp Meyer und Franz Korf
Migration from SERCOS III to TSN - Simulation Based Comparison of TDMA and CBS Transportation
5th International OMNeT++ Community Summit
Proceedings of the 5th International OMNeT++ Community Summit , Seite 52-62.

Marker: TI-I

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Florian Albrecht und Thomas Kletschkowski
A quasi-axisymmetric lattice model applied to analyze the vibrational contact between a PTFE shaft seal and a rotor
88th GAMM Annual Meeting
Weimar
6.-10. März 2017
PAMM
Verlag: Wiley,
akzeptiert

Marker: TI-FF

Zusammenfassung: Shaft seals shall prevent the leakage of oil and the intrusion of dirt particles in rotating machineries. A loss of contact between shaft and seal results in leakage. In order to ensure the functionality of the sealing system, the followability of the seal needs to be ensured. To analyze this problem, a model of a Polytetrafluorethylen (PTFE) shaft seal is coupled with an unbalanced rotor. PTFE has pronounced viscous and plastic characteristics. This leads – combined with other non neglectable nonlinearities – to a numerically challenging problem. To reduce the complexity and to increase the computational efficiency, the PTFE shaft seal is discretized by a quasi-axisymmetric lattice model. The results show that loss of contact at rotor speeds close to the eigenfrequency of the rotor (high amplitude) and at high rotor speeds (high frequency) is possible and shall be avoided to prevent leakage.

Technische Berichte:

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Cenk Gündogan, Peter Kietzmann, Thomas C. Schmidt und Matthias Wählisch
ICNLoWPAN -- Named-Data Networking in Low Power IoT Networks
Technical Report
Dokument Nummer: arXiv:1812.07025
Open Archive: arXiv.org,
Dezember 2018

Marker: TI-I

Zusammenfassung: Information Centric Networking is considered a promising communication technology for the constrained IoT, but NDN was designed only for standard network infrastructure. In this paper, we design and evaluate an NDN convergence layer for low power lossy links that (1) augments the NDN stateful forwarding with a highly efficient name eliding, (2) devises stateless compression schemes for standard NDN use cases, (3) adapts NDN packets to the small MTU size of IEEE 802.15.4, and (4) generates compatibility with 6LoWPAN so that IPv6 and NDN can coexist on the same LoWPAN links. Our findings indicate that stateful compression can reduce the size of NDN data packets by more than 70~% in realistic examples. Our experiments show that for common use cases ICNLoWPAN saves 33~% of transmission resources over NDN, and about 20~% over 6LoWPAN.

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Michael Frey, Cenk Gündogan, Peter Kietzmann, Martine Lenders, Hauke Petersen, Thomas C. Schmidt, Felix Shzu-Juraschek und Matthias Wählisch
Security for the Industrial IoT: The Case for Information-Centric Networking
Technical Report
Dokument Nummer: arXiv:1810.04645
Open Archive: arXiv.org,
Oktober 2018

Marker: TI-I

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Philipp Meyer, Franz Korf, Till Steinbach und Thomas C. Schmidt
Simulation of Mixed Critical In-vehicular Networks
Technical Report
Dokument Nummer: arXiv:1808.03081
Open Archive: arXiv.org,
August 2018

Marker: TI-I

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Cenk Gündogan, Peter Kietzmann, Martine Lenders, Hauke Petersen, Thomas C. Schmidt und Matthias Wählisch
NDN, CoAP, and MQTT: A Comparative Measurement Study in the IoT
Technical Report
Dokument Nummer: arXiv:1806.01444
Open Archive: arXiv.org,
Juni 2018

Marker: TI-I

Zusammenfassung: This paper takes a comprehensive view on the protocol stacks that are under debate for a future Internet of Things (IoT). It addresses the holistic question of which solution is beneficial for common IoT use cases. We deploy NDN and the two popular IP-based application protocols, CoAP and MQTT, in its different variants on a large-scale IoT testbed in single- and multi-hop scenarios. We analyze the use cases of scheduled periodic and unscheduled traffic under varying loads. Our findings indicate that (a) NDN admits the most resource-friendly deployment on nodes, and (b) shows superior robustness and resilience in multi-hop scenarios, while (c) the IP protocols operate at less overhead and higher speed in single-hop deployments. Most strikingly we find that NDN-based protocols are in significantly better flow balance than the UDP-based IP protocols and require less corrective actions

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Cenk Gündogan, Peter Kietzmann, Thomas C. Schmidt und Matthias Wählisch
HoPP: Robust and Resilient Publish-Subscribe for an Information-Centric Internet of Things
Technical Report
Dokument Nummer: arXiv:1801.03890
Open Archive: arXiv.org,
Mai 2018

Marker: TI-I

Zusammenfassung: This paper revisits NDN deployment in the IoT with a special focus on the interaction of sensors and actuators. Such scenarios require high responsiveness and limited control state at the constrained nodes. We argue that the NDN request-response pattern which prevents data push is vital for IoT networks. We contribute HoP-and-Pull (HoPP), a robust publish-subscribe scheme for typical IoT scenarios that targets IoT networks consisting of hundreds of resource constrained devices at intermittent connectivity. Our approach limits the FIB tables to a minimum and naturally supports mobility, temporary network partitioning, data aggregation and near real-time reactivity. We experimentally evaluate the protocol in a real-world deployment using the IoT-Lab testbed with varying numbers of constrained devices, each wirelessly interconnected via IEEE 802.15.4 LowPANs. Implementations are built on CCN-lite with RIOT and support experiments using various single- and multi-hop scenarios.

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Martine Lenders, Peter Kietzmann, Oliver Hahm, Hauke Petersen, Cenk Gündogan, Emmanuel Baccelli, Kaspar Schleiser, Thomas C. Schmidt und Matthias Wählisch
Connecting the World of Embedded Mobiles: The RIOT Approach to Ubiquitous Networking for the Internet of Things
Technical Report
Dokument Nummer: arXiv:1801.02833
Open Archive: arXiv.org,
Januar 2018

Marker: TI-I

Zusammenfassung: The Internet of Things (IoT) is rapidly evolving based on low-power compliant protocol standards that extend the Internet into the embedded world. Pioneering implementations have proven it is feasible to inter-network very constrained devices, but had to rely on peculiar cross-layered designs and offer a minimalistic set of features. In the long run, however, professional use and massive deployment of IoT devices require full-featured, cleanly composed, and flexible network stacks. This paper introduces the networking architecture that turns RIOT into a powerful IoT system, to enable low-power wireless scenarios. RIOT networking offers (i) a modular architecture with generic interfaces for plugging in drivers, protocols, or entire stacks, (ii) support for multiple heterogeneous interfaces and stacks that can concurrently operate, and (iii) GNRC, its cleanly layered, recursively composed default network stack. We contribute an in-depth analysis of the communication performance and resource efficiency of RIOT, both on a micro-benchmarking level as well as by comparing IoT communication across different platforms. Our findings show that, though it is based on significantly different design trade-offs, the networking subsystem of RIOT achieves a performance equivalent to that of Contiki and TinyOS, the two operating systems which pioneered IoT software platforms.

Konferenz-/Workshop-/Podiumsdiskussionsbeiträge, Ausstellungs-/Modenschaubeteiligungen:

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Florian Albrecht, S. Baydoun, H. Panzer, S. Marburg und Thomas Kletschkowski
Numerische Untersuchungen zur Dynamik einer Antriebswelle im Kontakt mit einer PTFE-Wellendichtung, 44th German Annual Conference on Acoustics (DAGA) Munich, Germany
19 März 2018

Marker: TI-FF

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Letzte Änderung: 23.01.15

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