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MIDDLEWARE
2009
Springer

PAQ: Persistent Adaptive Query Middleware for Dynamic Environments

9 years 3 months ago
PAQ: Persistent Adaptive Query Middleware for Dynamic Environments
Abstract. Pervasive computing applications often entail continuous monitoring tasks, issuing persistent queries that return continuously updated views of the operational environment. We present PAQ, a middleware that supports applications’ needs by approximating a persistent query as a sequence of one-time queries. PAQ introduces an integration stratraction that allows composition of one-time query responses into streams representing sophisticated spatio-temporal phenomena of interest. A distinguishing feature of our middleware is the realization that the suitability of a persistent query’s result is a function of the application’s tolerance for accuracy weighed against the associated overhead costs. In PAQ, programmers can specify an inquiry strategy that dictates how information is gathered. Since network dynamics impact the suitability of a particular inquiry strategy, PAQ associates an introspection strategy with a persistent query, that evaluates the quality of the query’s...
Vasanth Rajamani, Christine Julien, Jamie Payton,
Added 27 May 2010
Updated 27 May 2010
Type Conference
Year 2009
Where MIDDLEWARE
Authors Vasanth Rajamani, Christine Julien, Jamie Payton, Gruia-Catalin Roman
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