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Swiss Experiment Progress Report 2011 ETHZ/TIK

Swiss Experiment Progress Report 2011 ETHZ/TIK. Jan Beutel , Tonio Gsell, Roman Lim, Mustapha Yuecel, Christoph Walser, Matthias Keller, Bernhard Buchli, Josua Hunziker, Felix Sutton, Lothar Thiele, ETH Zurich. PermaSense Low-Power Sensor Network Technology. PermaSense – System Architecture.

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Swiss Experiment Progress Report 2011 ETHZ/TIK

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  1. Swiss ExperimentProgress Report 2011 ETHZ/TIK Jan Beutel, Tonio Gsell, Roman Lim, Mustapha Yuecel, Christoph Walser, Matthias Keller, Bernhard Buchli, Josua Hunziker, Felix Sutton, Lothar Thiele, ETH Zurich

  2. PermaSenseLow-Power Sensor Network Technology

  3. PermaSense – System Architecture • Support for multiple sensor types • Wireless sensor network • Ultra low-power data gathering (Dozer) • CoreStation • Embedded Linux (Gumstix) • 4 GB local storage, data duplication • WLAN/GPRS connectivity, backup modem • Solar powered • Data backend • Streaming interface with metadata (GSN) • Standard internet services for monitoring

  4. At the Core – Low-power Wireless Sensors • Static, low-rate sensing (2 min) • Temperature profiles, crack meters, resistivity • 3 years operation • < 0.1 Mbyte/node/day [Beutel, IPSN 2010]

  5. CoreStation - Embedded Linux & WLAN Router Gumstix Verdex WLAN Router TinyNode GSM EMP Protectors IP68 Enclosure and Connectors [Buchli, IPSN 2011]

  6. PermaSense Deployment Sites 3500 m a.s.l. A scientific instrument for precision sensing and data recovery in environmental extremes

  7. PermaSense Tech Transfer: Soil Moisture Sensing on the Thur CCES/RECORD

  8. Custom Built Quad Decagon 5TE Soil Moisture Probes

  9. CoreStation Installation on Existing RECORD Tower • Redundant connectivity (GPRS/WLAN) • Webcam • Local WLAN access for researchers (essid RECORD-THUR) • Online GSN data management • Operational since March 2010~10 Mio data points collected • Joint work with RECORD (P. Schneider, M. Schirmer, EAWAG)

  10. Matter Valley WLAN Collaborative Field Site Data Access & Maintenance

  11. Long-haul Communication – Directional WLAN • Data access from weather radar on Klein Matterhorn • Leased fiber/DSL from Zermatt Bergbahnen AG • Commercial components (Mikrotik) • Weatherproofing • Collaboration with APUNCH (P. Burlando, ETHZ), COGEAR (S. Löw, ETHZ), BAFU and Ct. Valais • Collaborative maintenance • Monitoring infrastructure

  12. Matter Valley WLANInfrastructure • 54 Mbit/sec 802.11a • PPP tunnel to ETHZ • Local (W)LAN access for researchers • Sites serviced • X-Band Radar (APUNCH) • Matterhorn Hörnliridge (PermaSense, COGEAR) • Hörnlihütte • Randa Rockfall (COGEAR) • Dirruhorn Rockglacier (nano-tera.ch X-Sense) • Grabengufer Rockglacier (nano-tera.ch X-Sense)

  13. Sensor Hosting Services & Support

  14. Alpine L1/L2 GPS Reference Network • Leica GPS1200+ receiver • WLAN access • Solar power • Weatherproofing • Field site installation support • Trial campaign in Jul/Aug 2010 • Rainfall detection • Online since • Matterhorn – Dec 2010 • Randa Rockfall – May 2010 • Collaboration with COGEAR/APUNCH (A. Geiger, S. Löw, P. Burlando, ETHZ)

  15. TechnischeInformatik und Kommunikationsnetze Computer Engineering and Networks GSN Data Integration

  16. Data Management – Online Semantic Data • Global Sensor Network (GSN) • Data streaming framework from EPFL • Organized in “virtual sensors”, i.e. data types/semantics • Hierarchies and concatenation of virtual sensors enable on-line processing • Translates data from machine representation to SI values • Adds metadata Web export Import from field GSN GSN Private Public Metadata ============ Position Sensor type Validity period …

  17. Multi-Site, Multi-Station, Multi-Revision Data…

  18. Metadata Change Management • Simple exchange of sensor hw/sw at runtime • Metadata annotated in text files • Wiki-based metadata possible -> integration effort

  19. Since 07/2008: ~150’000’000 data points Inconsistencies Between timestamps and sequence numbers Duplicates Data gaps Sporadic Systematic Revision / Extension June 2010 Installation & Service 2008 Service 2009 Sensornode 20 - 22 new installiation Issue – Data Quality and Integrity [Keller, SenSys 2009, IPSN 2011]

  20. Mitigating Data Loss – Backlog Architecture • Backlog = Auxiliary data aggregation layer on the field site • Data sink for surrounding sensor nodes • Reliable (flow controlled) synchronization to GSN • Extensible plugin functionality • Schedulable plugin/script execution, remote controlled by GSN

  21. GSN New Functionalities • Metadata Mapping Architecture • BackLog integration, GPS and Vaisala WXT520 data wrappers • Image manipulation • Binary storage on file system (or database) • Remote scheduling facilities • Frontend enhancements (network topology, log tab, plotting tools) • GSN/MySQL performance statistics • Lots of enhancements and bug fixes

  22. PermaSense Field Site Visit – June 2010 – 20 People

  23. ETH Zurich • Computer Engineering and Networks Lab • Geodesy and Geodynamics Lab • Hydrology and Water Resources Management • Geological Institute • Laboratory of Hydraulics, Hydrology and Glaciology • University of Zurich • Department of Geography • EPFL • Distributed Information Systems Laboratory • University of Basel • Department Computer Science Interested in more? http://www.permasense.ch

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