Projects imported from Forschungsportal

Wireless multi-hop networks (WMHNs) are characterized by their decentralization and flexibility.
Their decentralized design makes them cost-effective and quick to deploy, as they require little infrastructure beyond the radio interfaces of the nodes themselves, such as wired Radio Units (RUs) or Access Points (APs).
Also, redundant and flexible paths between nodes ensure high reliability and resilience against both unintentional technical problems and congestion, as well as cyberattacks.

Routing protocols used to build WMHNs, such as B.A.T.M.A.N. Advanced [1] or RPL [2], are primarily designed for changing but spatially stationary nodes.
In the world of the Internet of Things, Industry 4.0, and the era of the Low-Altitude Economy, the latter consisting of a constantly growing number of drones and VTOLs, nodes are often no longer stationary and are becoming increasingly mobile. Conventional routing protocols are not designed for this and must be extended or replaced accordingly to optimize bandwidth and latency and meet these new requirements.

We develop routing strategies that incorporate node mobility into decision-making by predicting where a node will be located in the future and whether using it as a hop in a path makes sense. Based on these strategies, existing routing protocols are extended and new routing protocols are implemented.

[1] B.A.T.M.A.N. Advanced Documentation Overview. [Online; accessed 30. Nov 2025]. URL: https://www.open-mesh.org/projects/batman-adv/wiki
[2] Roger Alexander, Anders Brandt, JP Vasseur, Jonathan Hui, Kris Pister, Pascal Thubert, P Levis, Rene Struik, Richard Kelsey, and Tim Winter. RPL: IPv6 Routing Protocol for Low-Power and Lossy Networks. RFC 6550, March 2012. URL: https://datatracker.ietf.org/doc/html/rfc6550

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The aim of the follow-up project is to further establish the BSc Computer Science course at TDU in Istanbul. The establishment of the MSc in Computer Science is also being promoted.

The computer science degree program will continue to be offered at the Faculty of Engineering at the
German University will continue to be supervised by OVGU over the next few years in
cooperation with partners from German universities.

Close coordination with research institutions and with the founding partners from Turkey is the basis for good cooperation.

Various milestones in the project have already been reached in recent years, enabling the project to be extended until 2026.

A cooperation agreement with the aim of concluding a double agreement is still in progress.
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The future of the internet will be completely wireless. Mobile networks play a central role in our lives, both in the smart home, the Internet of Things and for industrial applications. However, mobile networks are constantly changing. With 6G, the future generation that is expected by 2030, immersion will take center stage, and technologies such as augmented reality (AR), holograms, ultra-availability and haptic communication will be the technology driver for future development.
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Within the MIoT-Lab, an experimental environment for wireless multi-hop networks is being developed. It includes the hardware, software, an experiment description language and the entire infrastructure required to carry out replicable experiments in a real-world environment.
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The setup of Wireless Multi-Hop Networks (WMHNs) is flexible, fast and cost efficient. WMHNs are used for example in community networks (e.g. Freifunk), home automation (e.g. ZigBee) and are discussed for future telecommunication systems (e.g. 6G). However, the scalability of WMHNs remains challenging. Due to the decentralized nature and the shared medium every communication between the network nodes effects the nodes around. Therefore it is essential to avoid every preventable communication.

Broadcasts are essential for network services including routing protocols that are using them to find routes for unicast messages. Broadcasts in WMHNs can lead to a lot of redundant communication.
Without specialized Broadcast protocols WMHNs can be overloaded - the so called Broadcast Storm Problem: nodes that are forwarding the broadcast message interfere other nodes in the neighborhood that are also forward the broadcast message. Good Broadcast strategies reduce the forwarding of broadcast messages and still reach all or the vast majority of the network nodes.

We developed a Broadcast strategy that uses information of the 2-Hop-Neighborhood topology as well as the information, which node already forwarded the broadcast in the 1-hop-neighborhood. Based on this strategy we develop different variants of Broadcast protocols that reduces the number of nodes that are forwarding the Broadcast message.

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The aim of the project is to establish the BSc Computer Science program at TDU in Istanbul.
The establishment of the computer science degree program at the engineering faculty of the Turkish-German University
Turkish-German University over the next few years under the leadership of OVGU in cooperation with
cooperation with partners from German universities and research institutions and in close
with the founding partners from Turkey.

In the last 3 years, various milestones have already been reached in the project, so that an extension of the project until 2023 could be achieved.
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Funded by the Federal Ministry of Education and Research (Germany), the goal of the joint project DORIOT is to transform the centralized architecture of current SmartX environments into a dynamic architecture, to enhance static methods and tools into dynamic ones, and, using the methods of organic computing, to build the foundation of emergent systems. By employing organic computing impending failures or low QoS can be detected ahead of time and, thus, allows to employ counter measures by (dis-)aggregation of the affected services. In addition to increased fault tolerance, a uniform communication infrastructure is developed which seamlessly integrates existing protocols by using cross-protocol-proxies. This allows to cross protocol borders transparently and enables emergence. Based on the requirements and the goal to integrate existing products, APIs, and infrastructures the run-time environment was chosen: The RIOT operating system, developed for embedded devices, implements the POSIX API, which has the biggest market share on servers and in cloud computing systems. Similarly the SelectScript VM for migrated services runs on every device class. Thus the provided APIs no longer limits on which device a service is runnable, but only the required resources.

The use of code migrations results in new challenges for security and safety. Existing access control mechanisms are either centralized and, thus, a performance bottleneck, or they are too inflexible to adequately reflect the dynamics of privileges and capabilities in emergent systems. To cope with both issues a decentralized and dynamic mechanism for access control is developed. Another challenge is to assure correct operation after a service migrated to a new device. Certifying algorithms separate the verification of an algorithm’s results from the actual computation and provide efficient verification. This allows to integrate untrusted systems by performing the verification on trusted systems.

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The aim of the project is to establish the BSc Computer Science program at TDU in Istanbul.
The establishment of the computer science degree program at the engineering faculty of the Turkish-German
Turkish-German University over the next few years under the leadership of OVGU in cooperation with
cooperation with partners from German universities and research institutions and in close
with the founding partners from Turkey.
This text was translated with DeepL

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With knowledge about the structure of the local neighborhood (2 hops wide), decisions about the forwarding of messages can be made on a better data basis. By avoiding unnecessary communication, both energy and bandwidth are saved in the naturally limited frequency bands.
The scope of this project is the evaluation of broadcasting and the development of protocols that make use of the given neighborhood information.

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The aim of the project is to inspire young women from grade 11 onwards with specific, consecutive offers for mathematics, computer science, technology, natural sciences and engineering and to support them in their talent search, career and study choices. This measure is intended to increase the proportion of women studying in the STEM fields and counteract the shortage of skilled workers in science and engineering professions. The gender-specific support for female students in the project makes it easier for them to enter the world of study and work.

In the new project period, FEMININ is focusing on the rural regions of Saxony-Anhalt. The FEMININ tour will be present throughout Saxony-Anhalt, visiting regions such as Salzwedel, Mansfeld-Südharz and Wittenberg in particular. The project days in schools will be followed by further digital offerings such as webinars, e-learning units, interviews and online advice sessions. Chatting, sharing, liking - exchanging ideas in virtual spaces. The planned Science Camps call for active participation and creative work in workshops lasting several days. Women's Power Days to various companies and institutions in the fields of science and engineering as well as Internships round off the project's overall offering. The program also offers the opportunity to exchange ideas with young female scientists and students and creates space for new experiences.

The project is carried out in cooperation with Merseburg University of Applied Sciences. The cooperation partners are pooling their diverse experience and expertise to create a new integrated, state-wide program.
This text was translated with DeepL on 28/11/2025

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With the appearance of new broadband technology and future 5G networks the internet offers new capabilities for applications. Through increasing bandwidth and decreasing latency haptic communication will soon be feasible. The vision of a tactile internet will become reality.

In this project we study applications for this type of communication, for example in robotics, smart cities or cat-2car communication.  We mainly focus on wireless multi-hop networks. The the main goals of this project are 

• to develop models to predict latency behavior, 
• research new protocols for haptic communication and 
• propose new approaches to handle the highly dynamic and unpredictable behavior of such networks.

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Reliable and real-time indoor positioning are required in the future generation of communications networks.  GPS cannot be deployed for indoor applications because line-of-sight transmission between receivers and satellites is not possible in an indoor environment. There are various obstacles such as walls, equipment influencing the propagation of electromagnetic waves, which lead to multi-path and path-loss effects. Some interference and noise sources from other wired and wireless networks degrade the accuracy of positioning. There are approaches that enable distance measurement and location by analyzing of specific physical characteristics of radio signals. It is important to have a mathematical model which models the behavior of the signal in deferent environments. The model also helps the developer to design realistic simulation tool.

Objectives of the project

- Implementation of positioning techniques in embedded hardware and simulation environment.

- Performance evaluation of real-time indoor positioning in MIoT-testbed

- Analyze the issues such as multi-path loss effect, obstacles, interference and time synchronization.

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Industrial Wireless Sensors and Actuators Networks (IWSANs) are becoming increasingly emerging to realize the Industry 4.0 - smart factory concept. Process automation and factory automation are two of the important applications of the smart industry. In this regard, the objectives in achieving reliability, low latency, and as well as energy efficiency through Medium Access Control (MAC) are extensively researched.
In this project, we exploit MAC layer to propose an adaptive MAC protocol based on time slotted structure and channel hopping for industrial control applications. The protocol targets to meet the traffic requirements of two states of the control system: transient and steady state.
We take into account dynamics of the process control system so that the the protocol is adaptive to varying states of the process controller and satisfy its upstream and downstream traffic flows.

Objectives and evaluation:

-Proposed an adaptive and deterministic MAC protocol.

-Evaluate the protocol through simulation for various performance metrics such reliability, latency, and energy efficiency.

-Evaluate the protocol on the MIoT testbed for the above mentioned performance metrics.

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This thesis focuses on a specific human-machine-interface (HMI) scenario, where human users remotely control cyber-physical systems (CPS) with a mobile device. Examples are tablets or smartphones, which control entertainment systems in modern cars or navigate mobile robots in domestic or industrial areas. In this thesis malware attacks on mobile devices are in focus which potential affect interconnected CPS. This research focuses on two personal impacts on users of mobile devices: security (privacy) and safety (life and limb) impacts.

Classical approaches against malware are automated detection and reaction strategies, e.g. identifying and removing of malware from systems. This thesis introduces a warning approach as completion to classical approaches. It based on the idea of early introducing human users of mobile devices into the solution process to early protect users against personal security and safety impacts of malware attacks on mobile devices with potential effects on CPS.

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