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Published byLester Knight Modified over 8 years ago
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The ZebraNet Wild Life Tracker Department of Electrical Engineering Princeton University
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Road Map Background ZebraNet: Problem Statement ZebraNet Design Details Protocol Design Tradeoffs Current Status
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Background Sensor nets In areas without cellular coverage Using peer-to-peer communication With “ad hoc” methods for discovering network routes and keeping them up to date
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ZebraNet Biologists want to track animals ZebraNet: Wireless ad hoc network of zebras… –Intelligent tracking collars placed on sampled set of zebras –Sensor network: data collected includes GPS position info, temperature,
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Data to track: What are the sensors in this net? Current –GPS position sample every 3 minutes –Sun/Shade indication –Detailed position sampling: Standing still or moving? Speed? “Step rate”. Future –Head up or down: “bite rate” –Body temperature –Heart rate –Interactions with other species –ZebraCam
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Challenge Need sufficiently long range Power generation & storage: Power efficiency serious bandwidth and computational needs Reliability & fault tolerance Good physical design for ruggedness Variable frequency for use in US & Kenya
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ZebraNet Block Diagram
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ZebraNet sensor Weight: 1090 grams (2.4lbs) Designed to operate for 5 days without solar recharge Energy saving tricks Baby picture
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Basic Operation System Nodes collect logs of GPS position and other information. Peer-to-peer communication aggregates data back to researcher base station Research station is not fixed. Rather, it moves and is only intermittently available
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Protocol tradeoff Flooding: Every 3 minutes, zebras look for other zebras in range. Send to everyone they find. History-Based: Every 3 minutes, zebras look for others in range. Of the ones found, only send to one: the one with the best success rate at delivering data.
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Current Status January 2-24, 2004: ZebraNet heads to Kenya for its first test deployment! They were at the Mpala Research Centre and deploying nodes on zebras at the Sweetwaters Reserve. Mpala Research Centre
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