The first mass;produced pervasive computing de-vices are starting to appear-the AutoPC, the Internet-connected ScreenFridge, and the combination Mi-crowave Oven/Home Banking terminal. Although taken separately they appear bizarre, we believe they will play an important role in a world of perva-sive computing. Specifically, these devices will ac-cept or deliver information in the context in which it will be most useful, decoupling the information from the context in which it was originally created. We describe an extensible and modular architec-ture called Rome (to which all roads lead) that a.ddresses this information-routing problem while leveraging significant existing work on composable Internet services and adaptation for heterogeneous devices. Rome’s central abstraction is the concept of a trigger, a self-describing chunk of information bundled with the spatial and/or temporal constraints that define the context in which the information should be delivered. The Rome architecture man-ages triggers at a centralized infrastructure server and arranges for the triggers to be distributed to pervasive computing devices that can detect when the trigger conditions have been satisfied and alert the user accordingly. The main contribution of the architecture is an infrastructure-centric approach to the trigger management problem. We argue that pervasive computing devices benefit from extensive support in the form of of infrastructure computing Permission to make digital or hard copies of all or part ofthis work Iix personal or classroom use is granted without fee provided that topics are not made or distributed for profit or commercial advantage and that copies bear this nolice and the full citation on the first page. To cop)’ othcrwisc, to republish, to post on servers or to redistribute lo lisls. requires prior spccitic permission and/or a fee
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