Research Areas

The group is actively researching in the areas of Web Content Engineering, Location Based Services, Networks and Protocols, and Privacy and Security.

Web Content Engineering

Today the internet is a common medium of communication which provides a great amount of content. However, the user is pushed into the role of a passive consumer who can search and choose between many content offers but is directed by the interest of the producers who influences by eye catching headlines and pop-ups. But within the last years the internet offers sufficient opportunities for a more active role. Some examples for generating, publishing, commenting, evaluating and correcting content on the internet are Wikipedia, Blogs, Podcasts, Chats, and Annotations. Tagging-systems, folksonomies, and recommender systems help by finding contributions which might be in the users' interest. Blockers, filters and selectors stifle content the user does not want to consume. As a result there are new generations of tools coming up – browser, server and toolkits – which do not present the information of single provider but information customized to the user.

Location Based Services

Localizing people and objects is a foundation for many other research areas such as "ubiquitous computing" and "sensor networks". Our own activities incorporate all aspects from determining positions to processing and applications. Special interests are:

  • Technical methods for location determination.

    • Sensor fusion of position information.
    • Protocols for position and spatial data.
    • Model for geographic information.
    • Semantics of location information.
    • Security and manipulation of position data / authenticated positioning.
    • Application of position information in networks (eg. geographic routing).

    Networks and Protocols

    In the tremendous research area of networking and protocols our focus lies on communication optimization and communication enrichment. For example it is well known how to send data from A to B in any kind of network. But how can we find a path from A to B that involves just the right processing steps so B can actually understand the data A sent in a heterogeneous network topology? How can we gain and use knowledge about periodical changes in link quality to choose an optimal path from A to B in a wireless meshed network without an increase in the protocol overhead? These are typical questions we try to answer in the projects of this research area.

    Privacy and Security

    Privacy and security are ongoing issues in the field of information and communication technologies. Concerning security our research group works on problems related to secure device-to-device communication, access control systems and authentication protocols in context of location based services. Privacy recently has become a highly topical research area because of the increasing communication and digital processing of personal information in governmental and corporate structures, social networks or ubiquitous computing environments. In this area we concentrate on the principles limitation, awareness and control. A first step in protecting privacy is to limit the amount of personal information processed by a system as far as possible. Next it is crucial to communicate awareness for privacy related implications when disclosing or processing personal information. Finally one needs easy to use but precise tools and legislative regulations to control the flow of personal information.