Experiences with User-conngurable, Location-aware Scheduling

Mobile computers often beneet from software which adapts to its location. For example, a computer might be backed up when at the ooce, or the default printer might always be a nearby one. In many existing systems, location-triggered actions are only possible for speciic applications or with special infrastructure. This paper describes lcron, a system which supports user-conngurable actions triggered on change in location or other events common to mobile computers. We describe the design, implementation and our experiences with this system, focusing on use of existing clues for computer location (such as network connection) and mapping of low-level location into user-sensible terms.