Logical versus Physical Programming for Ubiquitous Applications

Ubiquitous computing provides services to users, according to their current situation. Interactions with such programs are as implicit as possible. We find among the applications the electronic supermarkets or the virtual guides for museums’ visitors. The majority of ubiquitous applications use a digital model of the physical world to compute the delivered services. With our approach the computations are done directly in the physical space. There’s no need to define a digital model of the physical environment. This note presents a physical programming environment dedicated to ubiquitous applications design. It also identifies a problem with the data addressing mode that can’t take into account the relative position of the moving entities.