Title

Optimizing Sensor Data Acquisition for Energy-Efficient Smartphone-based Continuous Event Processing

Publication Type

Conference Proceeding Article

Publication Date

5-2011

Abstract

Many pervasive applications, such as activity recognition or remote wellness monitoring, utilize a personal mobile device (aka smartphone) to perform continuous processing of data streams acquired from locally-connected, wearable, sensors. To ensure the continuous operation of such applications on a battery-limited mobile device, it is essential to dramatically reduce the energy overhead associated with the process of sensor data acquisition and processing. To achieve this goal, this paper introduces a technique of "acquisition-cost" aware continuous query processing, as part of the Acquisition Cost-Aware Query Adaptation (ACQUA) framework. ACQUA replaces the current paradigm, where the data is typically streamed (pushed) from the sensors to the smartphone, with a pull-based asynchronous model, where the phone retrieves appropriate blocks of sensor data from individual sensors, only when the stream elements are judged to be relevant to the query being processed. We describe algorithms that dynamically optimize the sequence (for complex stream queries with conjunctive and disjunctive predicates) in which such sensor data streams are retrieved by the phone, based on a combination of the communication cost and selectivity properties of individual sensor streams. Simulation experiments indicate that this approach can result in 70% reduction in the energy overhead of continuous query processing, without affecting the fidelity of the processing logic.

Discipline

Digital Communications and Networking | Software Engineering

Research Areas

Software Systems

Publication

IEEE International Conference on Mobile Data Management (MDM)

First Page

88

Last Page

97

ISBN

9780769544366

Identifier

10.1109/MDM.2011.76

Publisher

IEEE

Additional URL

http://dx.doi.org/10.1109/MDM.2011.76

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