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PRISM: PLATFORM FOR REMOTE SENSING USING SMARTPHONESTathagata Das, Prashanth Mohan, Venkata N. Padmanabhan, Ramachandran Ramjee, Asankhaya Sharma
MOTIVATIONSimplify the development of opportunistic and participatory sensing using mobile smartphones.
PRISM DESIGNRegistration
soft-state and automatically expire
APIs Two-level predicate Deployment mode
Update optimization Adaptive updates: p = min(1, ρ ∗ n/N) Prediction-based Suppression:
1) constant predictor 2) affine predictor: newV alue = α∗time+previousV alue.
SOFTWARE SANDBOXMitigating Privacy RisksRegulating Access to Sensors
Sensor Access Control Sensor Taint Tracking
Resource Metering Energy Metering: CPU frequency estimation Bandwidth Metering
Forced Amnesia