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DISSense: An Adaptive Ultralow-power Communication Protocol for Wireless Sensor Networks

DISSense: An Adaptive Ultralow-power Communication Protocol for Wireless Sensor Networks. Ugo Maria Colesanti* , Silvia Santini° , Andrea Vitaletti* * Dipartimento di Informatica e Sistemistica, “Sapienza” Università di Roma ° Department of Computer Science, ETH Zurich.

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DISSense: An Adaptive Ultralow-power Communication Protocol for Wireless Sensor Networks

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  1. DISSense: An Adaptive Ultralow-power Communication Protocol for Wireless Sensor Networks Ugo Maria Colesanti*, Silvia Santini°, Andrea Vitaletti* * Dipartimento di Informatica e Sistemistica, “Sapienza” Università di Roma ° Department of Computer Science, ETH Zurich

  2. Periodical Environmental Monitoring WSN deployed over large area Monitors physical phenomena Periodic samples collected by a sink

  3. Periodical Environmental Monitoring • Common requirements Node with radio at 100% duty cycle + 2 x AA Batteries 2000mAh Per mille duty cycle: Duty Cycle: 100 % => <1% Lifetime: 4-5 days => >1 year = ≈ 4-5 days Expected lifetime

  4. DISSense • Issues: • Lengthof GT, RI, DCI? • Howoftenresyncisneeded? • Synchronizationalgorithm? • Collectionprotocol? • Disseminationof the schedule? GuardTimeInterval ResynchronizationInterval Radio fully on (duty cycle 100%) Low PowerListening (duty cycle 0.1%) Data CollectionInterval Active GT RI DCI sleep Active GT DCI sleep Active GT RI DCI Samplingperiod (1-60 minutes) Adaptive cross layercommunicationprotocol Designedforenvironmentalmonitoringapplications

  5. DISSense GT RI DCI sleep GT DCI sleep GT RI DCI • Issues: • Lengthof GT, RI, DCI? • Howoftenresyncisneeded? • Synchronizationalgorithm? • Collectionprotocol? • Disseminationof the schedule? CTP Beacons • CollectionTreeProtocol (CTP) [3]

  6. DISSense GT RI DCI sleep GT DCI sleep GT RI DCI • Issues: • Lengthof GT, RI, DCI? • Howoftenresyncisneeded? • Synchronizationalgorithm? • Collectionprotocol? • Disseminationof the schedule? CTP Beacons • When parent selected: • Resync • Values shared + Packet timestamping (footer) + Schedule updates (footer) No additional time for Resync and dissemination

  7. DISSense GT RI DCI sleep GT DCI sleep GT RI DCI • Issues: • Lengthof GT, RI, DCI? • Howoftenresyncisneeded? • Synchronizationalgorithm? • Collectionprotocol? • Disseminationof the schedule? Adaptive Engine GT SamplingPeriod RI TimeToResync DCI Forhowmanysamplingperiod resync isNOT required TimeToCollect Data Skip

  8. DISSense GT RI DCI sleep GT DCI Protocol Duty Cycle Some formulas…

  9. Experiments • Testbed • Indoor, 4 months • 1,15,60 minutessamplingperiod • 15 TelosBmotes • TinyOSoperating system • Simulations • TOSSIM simulationenvironment • 1,2,5 minutessamplingperiod • 10,20,30,40 and 50 nodes • 20 randomdeploymentseach • Metrics: • Duty Cycle (%) • Data Delivery Ratio (%)

  10. Testbed Results AdaptiveEngine Performance

  11. SimulationResults

  12. Simulationresults Multi-sink DISSense (topology #1)

  13. Comparisontorelated work

  14. DISSenseforStructuralMonitoring • B1 Underground Construction (Conca d’Oro – Jonio) • Planned: • DISSense • 12 sensingnodes • 28 relaynodes • 1 hoursamplingperiod

  15. DISSenseforStructuralMonitoring Concrete Mounting Holes Instrumentation Box Tunnel Boring Machine

  16. References [1] Nicolas Burri, Pascal von Rickenbach, and Roger Wattenhofer. Dozer: Ultra-low power data gathering in sensornetworks. In Proceedingsof the Sixth International Conference on Information Processing in SensorNetworks, Cambridge, MA, USA, April 2007. [2] R. Musaloiu-E, C.-J.M.Liang, and A. Terzis. Koala: Ultra-low power data retrieval in wireless sensornetworks. In Information Processing in SensorNetworks, 2008. IPSN '08. International Conference on, pages 421 - 432, 2008. [3] OmprakashGnawali, Rodrigo Fonseca, KyleJamieson, David Moss, and Philip Levis. Collectiontreeprotocol. In Proceedingsof the 7th ACM Conference on EmbeddedNetworkedSensorSystems (SenSys 2009), November 2009

  17. ThankYou!

  18. Questions?

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