Dynamic object recomposition for active information system on mobile environment

Location-dependent information service requires an ability to change both the information and functions provided to the mobile client according to user location and time of access. The paper describes a framework for location dependent information service, called the mobile object model. In the mobile object model, a service consists of objects that contain both information and functions. These objects, called mobile objects, are managed as distributed objects. Mobile objects are recomposed to a composite object according to user status dynamically. This composite object is then executed to realize location-dependent information service. We also propose an architecture based on the model. The architecture reduces the load of network transmission and the amount of CPU power used by the mobile client. Finally, we present a prototype system developed on the WWW called "LODIS".