Dec. 16, 2008 Now that navigation systems are here to stay, we can hardly imagine life without them. Aside from private use for getting about on roads, they play an essential role in air and ocean traffic, and even in rail transport for guiding and monitoring trains. With its Galileo navigation system, the European Union intends to become independent of America’s GPS (Global Positioning System).*
The Federal Ministry of Education and Research recently approved the two-year project “Indoor”, which will run until the end of 2010. In this project, LMU computer scientists working with Professor Claudia Linnhoff-Popien are developing positioning and navigation technologies to be used in the field of traffic logistics and for emergency services. What they are focusing on in particular is indoor positioning and navigation.
The project aims at a fundamentally new development: Solutions so far have relied on the terminal device periodically sending position data to a server, even when the user, and therefore the terminal, is not moving at all. The LMU computer scientists, on the other hand, assign boundary circles to the users according to given queries and the movement of the persons or objects being monitored. The terminal only gets in touch with the server if the user moves beyond his circle. This method is more effective and economical, since the position data is only sent to the server when there is movement, and costs are only incurred at that moment.
This technology so far works best with GPS-supported terminals – and it will now be exciting to see how the new challenges of a Galileo module and the addition of indoor positioning will be met. As it is, the crux of the problem with large buildings is the given architecture and furnishing, both of which can lead to all kinds of wild shadowing effects and reflections. The present technology goes back to research done in the Mobile and Distributed Systems Group, which has been being published in prestigious international journals over the past five years, and which has led to numerous dissertations, one habilitation and a number of patent applications.
The aim of the “Indoor” project is to improve certain algorithms that will increase the energy and cost efficiency of location-based service applications. Localization algorithms for indoor applications shall be enhanced, existing platforms and concepts technically evaluated, and a user study conducted.
The scientists have daunting challenges ahead as they forge on with the project, since precise localization inside a large building is considerably more difficult to achieve than outdoors. Aside from the technical difficulty of achieving this, there is one nasty problem that stands in their way: the “semantics” of buildings. There is no way of knowing from a public building’s floor plan alone, for example, whether a door drawn on the plan is actually accessible to every public person, or whether it is perhaps only accessible to certain staff or to certain groups of people.
Together with a spin-off of the Mobile and Distributed Systems Group, Aloqa GmbH Munich, and a hardware developer for satellite navigation systems, Ifen GmbH Poing, a prototype shall be developed during the project, which shall implement the methods developed at the group as a tangible hardware module. And there is one more partner who will be involved in the testing phase: the Walt Disney Company, Germany. Disney is namely interested in this budding technology because it could be just what they need for their theme parks.
*Now the Mobile and Distributed Systems Group of Ludwig-Maximilians-Universität (LMU), München, is also involved in developing Galileo services.The introduction of Galileo will mark the independence of the European Union from America’s GPS (Global Positioning System) and the Russian Federation’s global navigation satellite system GLONASS. While Galileo, a joint project of the EU and the ESA (European Space Agency), is compatible with GPS, it guarantees independent and reliable availability in Europe.
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