T13-CenceMe - Sensing Meets Mobile Social Networks: The...

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Emiliano Miluzzo, Nicholas D. Lane, Kristóf Fodor, Ronald Peterson, Hong Lu, Mirco Musolesi, Shane B. Eisenman, Xiao Zheng, Andrew T. Campbell Sensing Meets Mobile Social Networks: The Design, Implementation and Evaluation of the CenceMe Application
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Introduction Constraints Mobile phone limitations Architectural issues Implementation Phone software Backend software Classifiers Phone Outline
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Andrew T. Campbell – head of Dartmouth Sensor Lab Group Introduction
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Group Introduction
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User centered social app Two critical questions Where are you What are you doing Use existing hardware (Mobile Phone’s like iPhone, Nokia N95 etc.) social networking website integration (Facebook, twitter) Introduction
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Mobile Phone Limitations 1. OS Limitations limited in terms of the programmability and resource usage control offered to the developer third party applications running on the phone may be denied resource requests and must be designed to allow interruption at any time so as not to disrupt regular operation of the phone. Design Considerations
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3. Security Limitations phone manufacturers and cellular network operators control access to critical components, including the APIs for access to the file system, multimedia features, Bluetooth, GPS, and communications via GPRS or WiFi, through a rights management system. Properly signed keys from a Certificate Authority 4. EnergyManagement Limitations Design Considerations
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Architectural Design Issues 1. Split-Level Classification . task of classifying streams of sensor data from a large number of mobile phones is computationally intensive . Split some classification to the phone and some to the backend servers . Primitives , the output of the classification process on the phone Design Considerations
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2. Power Aware Duty-Cycle To extend the battery lifetime of the phone when running the CenceMe - scheduled sleep techniques to both the data upload and the sensing components. how long can the sensors, Bluetooth, GPS, and communications upload be in a sleep mode given that the larger the sleep interval the lower the classification responsiveness of the system? current implementation the introduced delay varies according to the type of presence being inferred. makes sense - the goal of CenceMe to allow buddies in social networks to casually view each other’s sensing Design Considerations
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3. Software Portability push as much as we can to JME. a number of components need to be implemented directly using native Symbian APIs to support the necessary features Design Considerations
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The CenceMe application and system support consists of a software suite running on Nokia N95 mobile phones and backend infrastructure hosted on server machines. The software installed on the phones performs the following
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T13-CenceMe - Sensing Meets Mobile Social Networks: The...

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