Former Projects

Below you can find a list of finished research projects from the past years.

Mining anonymised location data

Location data is becoming more and more important. Nowadays, car navigation systems and mobile phones using GPS to track their positions are available to everyone. With web2.0 there is a need to share resources. Besides text, pictures and videos such resources can also consist of position information.
Depending on the activity recording of the position has different goals. Some people track their position while going jogging and analyse their fitness afterwards. Others use it to annotate photos or to show their holiday trip. Some of these tracks will be published and shared online. To protect your privacy track anonymisation can be done by deleting all time information. So nobody gets to know in which way the user was moving (by car, by bike, …) and when the user exactly visited the place.

In this project we want to use map data to analyse the anonymised location data. The question now is whether the combination of anonymised location data combined with map data (e.g. map of OpenStreetMap) can reconstruct the type of movment. The results will be used to advance track anonymisation, to support tag suggestion and track recommendation.

This was a project of: Martin Garbe

Recommender System for News Web Pages

A continually growing number of people use the internet for reading news. For this purpose international, as well as national news web sites exist. German speakers often use for example www.welt.de or www.spiegel.de. However, these news web sites provide a miscellaneous set of information and the user can easily get lost there. In the context of our research we focus on developing a framework to support the user finding information faster and simpler regarding the users interest. Indeed, information about the user is necessary. The users acceptance of such a framework goes along with high security and privacy standards, as well as less configuration time. Therefore, we are investigating methods to create an anonymous user profile by observing the users surf behaviour. Based on that outcome the news web pages are turned into personalized news web pages.

This was a project of: Anne Gutschmidt

AWBC - Aircraft weight and balance calculation

Funded by the state ministry for economic development, and in cooperation with the local company Dr. Frankenstein Computer we investigated how to improve the process of weighting aircrafts as part of the mandatory weight and balance calculation prior departure. Technologically, the project dealt with positioning of scales under the wheel of the landing gear. We investigated different methods of location determination.

The project was lead by Dr.-Ing. Thomas Mundt

Privacy in smart environments

In context of MuSAMA this project dealt with privacy issues specific to smart environments which support collaborative activities and adapt their appearance and behavior to individual user preferences. More information…

This was the PhD project of Dr.-Ing. Christian Bünnig

Decoupled Communication in Heteregeneous Mobile Networks

Another project in the context of MuSAMA dealt with content based decoupled communication between message producers and message consumers in mobile networks made up of devices using diverse communication technologies. More information…

This was the PhD project of Dr.-Ing. Henry Ristau

Low-Latency Handoffs in IEEE 802.11 Wireless Mesh Networks

The increasing interest in mobile audio- and video entertainment, mobile telephony, and mobile gaming drives research and development in the area of wireless communications. Currently, efforts are under way to design and build IP-based wireless access networks offering ubiquitous service by integrating different technologies like GSM, UMTS, WiMAX, and IEEE 802.11—a vision known as 4G.

This work focuses on IEEE 802.11, a Wireless Local Area Network technology. While IEEE 802.11 has already gained immense popularity for wireless broadband Internet access in residential houses, companies, and public places, its major drawback, limited range, still remains. An emerging concept to overcome this disadvantage is the notion of Wireless Mesh Networks (WMNs). The key idea of WMNs is to extend the range of a wireless Internet gateway by leveraging stationary relays as packet forwarders for nodes located further away. WMNs are commonly realized based on ad hoc multihop routing protocols, which offer features such as self-configuration, self-management, and self-healing. Consequently, WMNs allow for a very fast network deployment with little or no configuration effort.

Nevertheless, a key prerequisite for the acceptance of WMNs is support for seamless mobility so that real-time applications like Voice over IP (VoIP) can be used while being mobile. An unsolved issue in this context are handoffs from one WMN to another, which lead to delays ranging from several hundred milliseconds to seconds. Since this is not acceptable for applications like VoIP, this thesis presents novel concepts for fast handoffs in IEEE 802.11-based WMNs. First, a novel approach to scanning for IEEE 802.11 is developed, which enables mobile nodes to quickly find other available WMNs. Second, two mechanisms for fast handoff-related multihop route rediscovery are proposed. Finally, protocols are illustrated, which apply the novel concepts. These protocols were evaluated both by simulation as well as during a testbed study. The results show that the proposed solutions reduce handoff-related communication interruptions significantly to 80ms or less—an order of magnitude considered acceptable for applications like VoIP.

The project was funded by the Germany Research Foundation (DFG), Graduate School 466.

This was the PhD project of Dr.-Ing. Sebastian Speicher.

Confidential Communication in Peer to Peer Networks

Reading emails, online newspaper or doing online shopping and so on - every action of an internet user leaves a breadcrumb leading to an unambiguous identification of the user. Even more, picking up those breadcrumbs unveils the users identity. It even exists the possibility to create a profile about the users interest. Based on that profile for example target-oriented advertisement can be chosen and displayed to the user. The knowlegde about the fact of the observation might manipulate the behaviour of the user in terms of avoiding certain web pages.

On the other hand, in real life the visit of a business or the purchase of a magazine is a private process. According to that the effort for creating a profile of the users interest is relatively high.

The goal of the project is to build up a confidential communication on the internet. The vision is that it should be under the users control when and where he is going to unveil his identity.

This was a project of Stefan Lange.

Other projects

We also have a list of other former projects which is unfortunately available in German language only.