The term ”Ubiquitous Computing” was minted by Marc Weiser from Xerox PARC for an environment where computers are available everywhere without being recognized as such. It requires small and portable, even wearable, terminal devices, and wireless network access over multiple communication channels. The UbiCampus project is visioned by IRB and VTT to study and develop the post 3G ubiquitous networking environment for intelligent applications The UbiCampus Project aims at building and using a local ubiquitous computing environment on (a part of) the campus of the University of Hannover. The project includes transmission technology, middleware and application aspects. This paper gives a short introduction into Ubiquitous Computing, introduces the basic idea of the UbiCampus project and discusses its objectives in terms of infrastructure, applications and Jini-based service architectures.