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The Hitchhiker’s Guide to Successful Residential Sensing Deployments

The Hitchhiker’s Guide to Successful Residential Sensing Deployments. Timothy W. Hnat , Vijay Shrinivasan , Jiakang Lu, Tamim I. Sookoor , Raymond Dawson, John Stankovic , and Kamin Whitehouse. Sensing in Homes. Energy Management. Home Automation. Medical Monitoring.

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The Hitchhiker’s Guide to Successful Residential Sensing Deployments

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  1. The Hitchhiker’s Guide to Successful Residential Sensing Deployments Timothy W. Hnat, Vijay Shrinivasan, Jiakang Lu, Tamim I. Sookoor, Raymond Dawson, John Stankovic, and Kamin Whitehouse

  2. Sensing in Homes Energy Management Home Automation Medical Monitoring People spend 65% of time in their homes

  3. Sensing in Homes Indoors is hard too! Extreme Environments Photo courtesy of: Jan Beutel

  4. Sensing in Homes #Sensors < #Outlets #Sensors > #Outlets Difficulty #Sensors 1200 sensors Over 20 homes Up to 1 year/home

  5. Sensing in Homes #Homes < #Researchers #Homes > #Researchers Difficulty #Sensors #Homes 1200 sensors Over 20 homes Up to 1 year/home

  6. Sensing in Homes #Days < ~1 month #Days > ~1 month Difficulty #Sensors #Homes #Days 1200 sensors Over 20 homes Up to 1 year/home

  7. Outline Deployment Overview Reliability and Failure Analysis A Hitchhiker’s Guide

  8. Deployments Overview

  9. Deployments Overview

  10. Deployments Overview

  11. Our Deployments

  12. Outline Deployment Overview Reliability and Failure Analysis A Hitchhiker’s Guide

  13. Fault Analysis Sensors … Time

  14. Failure Analysis

  15. Fault Analysis Power Outage Sensors … Time Sensor-Days – down time × number of sensors

  16. Fault Analysis Reinstall Hard drive failure Sub-system failure Plug disconnections

  17. Outline Deployment Overview Reliability and Failure Analysis A Hitchhiker’s Guide

  18. Homes are Not a Power Panacea • 30-40 outlets per house • Long wires • 2.3x more down time than batteries • More maintenance calls

  19. Homes Have Poor Connectivity Exploiting Home Automation Protocols for Load Monitoring in Smart Buildings • Wireless connectivity • Power line communications • Wires • 180bit/s • 5 min polling rate

  20. Homes are Hazardous Environments • Children • Mobile objects • Roomba • Guests and cleaning services

  21. Homes are Remote Environments • Minimize installation time • Scout • Lab assembly and configuration • Checklists

  22. Expect Limited User Participation Button Tracking Wearable Tracking Self-reporting Surveys 22

  23. Aesthetics Matter in Homes Disappear into the woodwork Leave no trace No LEDS at night Noise

  24. Simplify the Architecture

  25. Similar Work • Infrastructure-based • Neural Network House, Aware-Home, MavHome, PlaceLab • Infrastructure-less • Tapia, Cook, Kasteren • Lessons Learned • Edwards and Grinter – 7 challenges • “Hitchhiker’s guides for WSN deployments”

  26. Summary AC Power is not abundant or reliable Wireless connectivity is worse than expected Unexpected environmental hazards Houses are remote environments User participation is limited Aesthetics are important COTS are a double-edged sword

  27. Thank You Any questions?

  28. Root Failures

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