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Bluetooth 2.1 Based Emergency Data Delivery System in HealthNet

Bluetooth 2.1 Based Emergency Data Delivery System in HealthNet. Seung-Hoon Lee, Sewook Jung, Alexander Chang, Dea-Ki Cho, and Mario Gerla Network Research Lab Department of Computer Science University of California, Los Angeles. Outline. Overview of wireless networks in HealthNet

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Bluetooth 2.1 Based Emergency Data Delivery System in HealthNet

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  1. Bluetooth 2.1 Based Emergency Data Delivery Systemin HealthNet Seung-Hoon Lee, Sewook Jung, Alexander Chang, Dea-Ki Cho, and Mario Gerla Network Research Lab Department of Computer Science University of California, Los Angeles

  2. Outline • Overview of wireless networks in HealthNet • Bluetooth networks in HealthNet • A new protocol using BT 2.1 • Simulation • Conclusion

  3. HealthNet • Interests in health care considerably increased • BodyLAN based wireless sensor platforms • Monitoring patient status Sensor Network

  4. HealthNet Sensor Wireless networks for cable replacement

  5. HealthNet Sensor • Wireless networks for cable replacement • Issues: Small, cheap, power efficient • Wi-fi, ZigBee, Bluetooth

  6. Bluetooth Network in HealthNet • Bluetooth • Small enough being attached on sensors • Cheap, power efficient • Widely being used – Most of cell phone, laptop • Issues • Long connection delay • Connection establishment: 5 ~ 10 seconds • Causes severe problem on time critical applications (i.e., emergency health applications) • BT cannot be utilized for EMERGENCY uses.

  7. Bluetooth Network in HealthNet • Bluetooth 2.1 • Recently published (July 2007) • Introducing new enhancement features • Customizing two new features of BT 2.1 • EIR (Extended Inquiry Response) • SSP (Secure Simple Pairing)

  8. Bluetooth 2.1 • Bluetooth 2.1 • Recently published (July 2007) • Introducing new enhancement features • Customizing two new features of BT 2.1 • EIR (Extended Inquiry Response) • Original purpose: Inquiry Response message •  Propagating emergency data • SSP (Secure Simple Pairing) • Original purpose: security mechanism for data •  Protecting EIR data

  9. Bluetooth 2.1 • Comparison of data dissemination stages • Bluetooth 2.0 • Peer discovery: Find other peers within the communication range • Paging: Connection setup • Connection established: Data delivery • Bluetooth 2.1 • Peer discovery

  10. Bluetooth 2.1 • Bluetooth 2.0

  11. Bluetooth 2.1 Inquiry • Bluetooth 2.0 • Peer Discovery

  12. Bluetooth 2.1 Inquiry • Bluetooth 2.0 • Peer Discovery

  13. Bluetooth 2.1 Inquiry Response • Bluetooth 2.0 • Peer Discovery

  14. Bluetooth 2.1 Exchange device information Channel synchronization • Bluetooth 2.0 • Paging

  15. Bluetooth 2.1 Connection established Data delivery • Bluetooth 2.0 • Connected

  16. Bluetooth 2.1 Inquiry • Bluetooth 2.1 • Peer Discovery

  17. Bluetooth 2.1 Inquiry • Bluetooth 2.1 • Peer Discovery

  18. Bluetooth 2.1 Data delivery • Bluetooth 2.0 • EIR Data Delivery

  19. Bluetooth 2.1 • EIR based data delivery • Connectionless • Not protected by BT Security mechanisms • Secure Simple Pairing (SSP) • Customizing SSP procedures • Protecting EIR data • PKI based security method • Keys generated by SSP stages • Encrypt/Decrypt EIR data with the keys

  20. Simulation • Simulation • NS2 + UCBT + BT 2.1 implementation • UCBT: Bluetooth simulation module • UCBT not supporting BT 2.1 ( BT 2.1 recently published)

  21. Simulation • HealthNet Scenario • Patient monitoring system without any network infrastructure. • Emergency data delivered by Peer-to-Peer overlay • Three different nodes: • Patient: Emergency data source (static) • Nurse: Delivering data by P2P (mobile) • Data Collector: Collecting data (static) peer-to-peer Body Sensors Nurses (Mobile) Patient Collection Center

  22. Simulation • HealthNet Scenario • Patient monitoring system without any network infrastructure. • Emergency data delivered by Peer-to-Peer overlay • Three different nodes: • Patient: Emergency data source (static) • Nurse: Delivering data by P2P (mobile) • Data Collector: Collecting data (static) peer-to-peer Body Sensors Nurses (Mobile) Patient Collection Center

  23. Simulation • HealthNet Scenario • Patient monitoring system without any network infrastructure. • Emergency data delivered by Peer-to-Peer overlay • Three different nodes: • Patient: Emergency data source (static) • Nurse: Delivering data by P2P (mobile) • Data Collector: Collecting data (static) peer-to-peer Body Sensors Nurses (Mobile) Patient Collection Center

  24. Simulation • HealthNet Scenario • Patient monitoring system without any network infrastructure. • Emergency data delivered by Peer-to-Peer overlay • Three different nodes: • Patient: Emergency data source (static) • Nurse: Delivering data by P2P (mobile) • Data Collector: Collecting data (static) peer-to-peer Body Sensors Nurses (Mobile) Patient Collection Center

  25. Simulation Results Our protocol using BT 2.1 works a lot better than the conventional scheme Number of nodes: Various Node Speed: 1 m/s Area: 50x50 m2

  26. Simulation Results Our protocol using BT 2.1 works a lot better than the conventional scheme Number of nodes: 30 Node Speed: 1 m/s Area: Various

  27. Conclusion • Resolving a connection delay problem of Bluetooth devices in HealthNet with keeping the same security level • Customizing EIR and SSP • Simulation results confirm the improvement of BT 2.1 based data delivery • Delay and Power Consumption • Bluetooth devices are applicable for emergency applications in HealthNet

  28. Q & A • Questions?

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