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Erschienen in:
2007 | OriginalPaper | Buchkapitel
Fact Spaces: Coordination in the Face of Disconnection
verfasst von : Stijn Mostinckx, Christophe Scholliers, Eline Philips, Charlotte Herzeel, Wolfgang De Meuter
Erschienen in: Coordination Models and Languages
Verlag: Springer Berlin Heidelberg
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Coordination languages for ad hoc networks with a fluid topology do not offer adequate support to detect and deal with device disconnection. Such a disconnection is particularly relevant if the device provided context information rather than emitting messages, as such context information then becomes invalid. This paper proposes the Fact Space Model which establishes a logic coordination language on top of
Lime
’s federated tuple space. In the model, the federated space offers applications a consistent view of their environment over which they can reason using logic rules. These rules encode which conclusions may be drawn from the presence of particular facts, and are similarly used to ensure the consistency of these conclusions when devices go out of range. By allowing applications to add application-specific hooks to these rules, the application programmer is offered a general-purpose mechanism to respond to the discovery and disconnection of devices.