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Ubiquitous Networked Devices

Ubiquitous Networked Devices. David E. Culler Computer Science Division University of California, Berkeley Intel Berkeley XIS Lab. Circulatory Net. Disaster Mgmt. Habitat Monitoring. The Systems Challenge. 10 years from now the most of the network will be small, embedded devices

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Ubiquitous Networked Devices

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  1. Ubiquitous Networked Devices David E. Culler Computer Science Division University of California, Berkeley Intel Berkeley XIS Lab

  2. Circulatory Net Disaster Mgmt Habitat Monitoring The Systems Challenge • 10 years from now the most of the network will be small, embedded devices • today ship 200 M microproc/year, 8.5 B embedded proc/year What’s the challenge? (a) They won’t be individually important like your PC, laptop, PDA, cell phone • 100s-1,000s per person • reside where no system admin can go (b) Highly Application Specific (c) Highly constrained resources (storage, energy) (d) Must be Robust despite changing environment (e) All of the above

  3. Starting Point • Hands-on Experience with Large Networks of Tiny Network sensors • small microcontroller, low-power radio, flash/eeprom • sensor and power boards • tiny event driven operating system • intense constraints, freedom of abstraction • Re-explore entire range of networking issues • encoding, framing, error handling • media access control, transmission rate control • discovery, multihop routing • broadcast, multicast, aggregation • active network capsule (reprogramming) • localization, time synchronization • security, network-wide protection • density independent wake-up and proximity est. • Fundamentally new aspects in each

  4. Example: self-organized multicast • Simple, General middleware component • Novel dist. systems primitives • Energy/Robustness tradeoffs • Complex dynamics • Use ‘senses’ to stabilize/optimize if (new mcast) then take action retransmit modified request 2e 2b 2a 2d 1 0 2c

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