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Microsoft Research Faculty Summit 2007. Dust To Doctors: WSN For Assisted Living. John A. Stankovic BP America Professor, UVA Microsoft Corporation. Outline. Problems of interest Univ. of Virginia AlarmNet Microsoft interactions HealthGear SensorMap Summary. The 4 Main Problems.
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Dust To Doctors:WSN For Assisted Living John A. Stankovic BP America Professor, UVA Microsoft Corporation
Outline • Problems of interest • Univ. of Virginia AlarmNet • Microsoft interactions • HealthGear • SensorMap • Summary
The 4 Main Problems • Home health care
The Problems • Home health care • (Large scale) assisted living facilities
The Problems • Home health care • (Large scale) assisted living facilities • Flexible targeting of care to a person’s health condition • Longitudinal studies
AlarmNet • Assisted Living and Residential Monitoring Network
AlarmNet Architecture Internet Internet Nurses Stations
SATIRE * With the Univ. of Illinois
SATIRE • Activity of daily living classification • Five two-axis accelerometer network for classifying activities with a HMM
AlarmNet Architecture Dust Light Pollen Humidity Temperature Motion Activities PDAs Internet Nurses Stations Internet
AlarmNet Architecture Privacy Security Internet Nurses Stations Internet
Privacy – Stakeholders • Patients • Patients family and friends • Doctor – what advantages for them in treating patients • Nurse • Technician • Orderly • Admin • Social Worker
Privacy - Many Data Types • Personal medical data • Personal activity data • Environmental data • Contextual data • Longitudinal data • System Performance data
Authorization Framework Real- Time
AlarmNet Architecture Privacy Security Internet Nurses Stations Internet Internet
DB PDA Real-Time Queries AlarmGate SW on stargate
AlarmNet Architecture Privacy Security Internet Nurses Stations Internet
Circadian Rhythms Circadian activity rhythm per room for 70 days
BehavioralDeviation Diurnal/nocturnal activity Life Habits at-home Learning period
HealthGear And AlarmNet • Support for heterogeneous health care systems • Utilize Cell phones • BlueGate, WiGate, EtherGate • Unobtrusive body networks • Behavior based systems management • Exploiting circadian activity rhythms
Enabling Symbiosis OfHeterogeneous Health Care Systems Pulse Oximeter Smart phone HealthGear Alarms Any Data Bluetooth BlueGate Gateway POGA WiGate Gateway Blood Pressure Sensor, ECG, … EtherGate Gateway PC, DB, AlarmNet Backend AlarmNet SeeMote StarGate Gateway IEEE 802.15.4 WiFi, Ethernet
Pulse, SpO2 Tripwire Motion, Light BP Scale ECG Switch Environmental Dust Enabling Symbiosis of Heterogeneous Health Care Systems Pulse Oximeter Smart phone HealthGear Bluetooth WiGate BlueGate AlarmNet WiFi, Ethernet IEEE 802.15.4 SeeMote
Gateways For Heterogeneous Sensor Networks • BlueGate • Bluetooth to MICAz, 802.15.4, 2.4GHzRF • Bluetooth to MICA2, 4xx/9xx MHz RF • WiGate • 802.15.4 to WiFi (802.11b/g) • EtherGate • 802.15.4 to wired Ethernet with POE • NordGate • Nordic RF (ECO mote, Poga2) to 802.15.4 and/or Bluetooth
Antenna Li Ion Battery RF, MCU, Accl. Main board POGA – Unobtrusive Body Network Sensor Node • Classify and detect ADLs - accelerometer • Two versions • Tmote-Mini based – 802.15.4 compatible (designed/built) • Fast design time using Tmote module • TinyOS compatible • PHY-compatible with ZigBee • Nordic RF chip based (future work) • Smaller form factor/cost (expected 10x20mm w/o battery)
CAR Based Power Management Alerts and Messages for the caregivers User Identification Detection of multiple people Detection of irregular behaviors and anomalies Context Aware Power Management (CAPM) Motion sensors Other Sensors Activity pattern inference Through Circadian Activity Analysis Sensor network Backbone Base Station
SensorMap • Publishing and searching private data streams • Privacy guarantees • Anonymous aggregates • Quality control for search results • Rank real-time/archived sensor data search results
StreamPublish Tool • AlarmNet • Privileged applications • One administrative domain • MetroNet • Public information • Many administrative domains • Must support • Privacy • Mobility • Data annotation
StreamRank Tool • Rank data streams like PageRank algorithm ranks web pages • All data need not be at central databases • Aggregated streams created by users – can be ranked
Partners • Microsoft • Univ. of Virginia Medical School • Harvard: (some) body networks • Johns Hopkins: Triage mote • Univ. of Illinois: Smart clothing http://www.cs.virginia.edu/wsn/medical/
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