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arXiv · 1310.3623

Enabling Context-awareness by Predicate Detection in Asynchronous Pervasive Computing Environments

Yiling Yang·Yu Huang·Xiaoxing Ma·Jian Lu
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Abstract

Pervasive applications are involving more and more autonomous computing and communicating devices, augmented with the abilities of sensing and controlling the logical / physical environment. To enable context-awareness for such applications, we are challenged by the intrinsic asynchrony among the context collecting devices. To this end, we introduce the predicate detection theory and propose the Predicate-Detection-based Context-Awareness (PD-CA) framework, in which: a) logical time is used to explicitly cope with the asynchrony; b) specification of predicates enables the applications to express contextual properties of their concerns; c) online and incremental predicate detection algorithms effectively enable context-awareness at runtime. Under the guidance of the PD-CA framework, we present the design and implementation of the MIPA middleware, which shields the applications from the burden of processing the asynchronous contexts. We also demonstrate how PD-CA simplifies the development of context-aware applications. Experimental evaluations show the performance of MIPA in supporting context-aware applications despite of the asynchrony.

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Yiling Yang, Yu Huang, Xiaoxing Ma, Jian Lu. 2013-10-14. Enabling Context-awareness by Predicate Detection in Asynchronous Pervasive Computing Environments. https://arxiv.org/abs/1310.3623

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