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Volker Turau

Picture of Volker Turau
Prof. Dr. rer. nat. Volker Turau
Room 4.088, building E
Am Schwarzenberg-Campus 3
21073 Hamburg
phone+49 40 42878 - 3530
e-mail

I am professor at Hamburg Universtity of Technology since October 2002.


Program Committee Activities | Editorial Activities | CV | Ph.D. students

Books

Algorithmische Graphentheorie - 4., extended and revised edition
De Gruyter Studium, 2015, ISBN 978-3-110-41727-2 (Solutions)

Erdős number

My Erdős number is 3.

Teaching

Publications

Florian Meyer and Volker Turau. QMA: A Resource-efficient, Q-learning-based Multiple Access Scheme for the IIoT. In 2021 IEEE 41st International Conference on Distributed Computing Systems (ICDCS), IEEE, October 2021, pp. 864–874. Washington DC, USA / Virtually.
[BibTeX] [Abstract] [DOI] [URL]
@InProceedings{Telematik_icdcs_2021, author = {Florian Meyer and Volker Turau}, title = {QMA: A Resource-efficient, Q-learning-based Multiple Access Scheme for the IIoT}, booktitle = {2021 IEEE 41st International Conference on Distributed Computing Systems (ICDCS)}, pages = {864-874}, publisher = {IEEE}, day = {7-10}, month = oct, year = 2021, location = {Washington DC, USA / Virtually}, }
Abstract: Many MAC protocols for the Industrial Internet of Things, such as IEEE 802.15.4 and its extensions, require contention-based channel access for management traffic, e.g., for slot (de)allocations and broadcasts. In many cases, subtle but hidden patterns characterize this secondary traffic, but present contention-based protocols are unaware of these patterns and therefore cannot exploit them. Especially in dense networks, these protocols often do not provide sufficient throughput and reliability for primary traffic, i.e., they cannot allocate transmission slots in time. In this paper, we propose QMA, a contention-based multiple access scheme based on Q-learning. It dynamically adjusts transmission times to avoid collisions by learning patterns in contention-based traffic. We show that QMA solves the hidden node problem without the overhead for RTS/CTS messages and, for example, increases throughput from 10 packets/s to 50 packets/s in a hidden three-node scenario without sacrificing reliability. Additionally, QMA's scalability is evaluated in a realistic scenario for slot (de)allocation in IEEE 802.15.4 DSME, where it achieves up to twice more slot (de)allocations per second.
Kai Hoth, Tom Steffen, Béla Wiegel, Amine Youssfi, Davood Babazadeh, Marcus Venzke, Christian Becker, Kathrin Fischer and Volker Turau. Holistic Simulation Approach for Optimal Operation of Smart Integrated Energy Systems under Consideration of Resilience, Economics and Sustainability. Infrastructures, 6(11), October 2021.
[BibTeX] [Abstract] [DOI] [PDF]
@Article{MDPI_CyEntEE_Simulation_Smart_Energy_System_2021, author = {Kai Hoth and Tom Steffen and Béla Wiegel and Amine Youssfi and Davood Babazadeh and Marcus Venzke and Christian Becker and Kathrin Fischer and Volker Turau}, title = {Holistic Simulation Approach for Optimal Operation of Smart Integrated Energy Systems under Consideration of Resilience, Economics and Sustainability}, pages = , journal = {Infrastructures}, volume = {6}, number = {11}, publisher = {MDPI}, month = oct, year = 2021, }
Abstract: The intermittent energy supply from distributed resources and the coupling of different energy and application sectors play an important role for future energy systems. Novel operational concepts require the use of widespread and reliable Information and Communication Technology (ICT). This paper presents the approach of a research project that focuses on the development of an innovative operational concept for a Smart Integrated Energy System (SIES), which consists of a physical architecture, ICT and energy management strategies. The cellular approach provides the architecture of the physical system in combination with Transactive Control (TC) as the system’s energy management framework. Independent dynamic models for each component, the physical and digital system, operational management and market are suggested and combined in a newly introduced co-simulation platform to create a holistic model of the integrated energy system. To verify the effectiveness of the operational concept, energy system scenarios are derived and evaluation criteria are suggested which can be employed to evaluate the future system operations.
Volker Turau. Synchronous Concurrent Broadcasts for Intermittent Channels with Bounded Capacities. In 28th International Colloquium on Structural Information and Communication Complexity - Sirocco 2021 -, Springer, June 2021, pp. 296–312. virtual.
[BibTeX] [Abstract] [DOI] [Slides]
@InProceedings{Telematik_sirocco_2021, author = {Volker Turau}, title = {Synchronous Concurrent Broadcasts for Intermittent Channels with Bounded Capacities}, booktitle = {28th International Colloquium on Structural Information and Communication Complexity - Sirocco 2021 -}, pages = {296-312}, publisher = {Springer}, day = {28-1}, month = jun, year = 2021, location = {virtual}, }
Abstract: In this work we extend the recently proposed synchronous broadcast algorithm amnesiac flooding to the case of intermittent communication channels. In amnesiac flooding a node forwards a received message in the subsequent round. There are several reasons that render an immediate forward of a message impossible: Higher priority traffic, overloaded channels, etc. We show that postponing the forwarding for one or more rounds prevents termination. Our extension overcomes this shortcoming while retaining the advantages of the algorithm: Nodes don’t need to memorize the reception of a message to guarantee termination and messages are sent at most twice per edge. This extension allows to solve more general broadcast tasks such as multi-source broadcasts and concurrent broadcasts for systems with bounded channel capacities.

The complete list of publications is available separately.

Supervised Theses

Open Theses

Ongoing Theses

Completed Theses