Harnessing Latent Mobile Phone Resources For Wireless Telemetry
Mobile Phone Sensor-Net
• Mobile phones are practically ubiquitous. Everyone carries them and most of them are turned on and connected 24x7. Today's mobile phones, even the least expensive ones, have sensors, spare cycles, and connectivity. These resources can be applied to a wide variety of Social Telemetry Applications, to powerful, and potentially even troubling, effect. We present findings of a real-world deployment of such a system.
Mobile Phone Sensor-Net
Analysis
P2PSuper-Node
Basic “edge”(people)
Edge-Plus
Fixed (anchor) Node
• Hybrid P2P and client/server
• Autonomous, unattended operation
Mobile Phone Sensor-Net
LocationLocation
ProximityProximity
SignalingSignaling
Basic phone• Bluetooth• SMS
Ambient Awareness Stream
• Autonomous• Peer nodes share
with each other and upload to cooperating “super-nodes” via Bluetooth
• Edge devices can also act on SMS and other triggers (position reports, geofence, etc.)
Ambient Awareness Stream
Location updates
time
Ambient Awareness Stream
Bluetooth devices coming and going
time
• Proximity to other mobiles and fixed (anchor) radios
• Enables “crowd” predictions even if devices are not participating
Mobile Phone Sensor-Net
Theater
Mall
As a person moves around among other people and things, patterns emerge.
Conclusions
• Mobile phones can effectively serve as a Sensor-Net, without noticeable impact to normal phone operations, performance, battery life, reliability etc.• Achieved off-net without carrier participation or cooperation
• Basic phones, “smart” phones, PCs and back-office operating together
• Wi-fi, GPS, and 3G are not required• Get practical and effective results using low-end phones
• Combining location, time, proximity, and signaling provides significantly richer picture than location alone
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