Bluetooth 2.1 Based Emergency Data Delivery System in HealthNet

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

• Wireless networks for cable replacement

Sensor
5
HealthNet

• Wireless networks for cable replacement
• Issues Small, cheap, power efficient
• Wi-fi, ZigBee, Bluetooth

Sensor
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

• Bluetooth 2.0
• Peer Discovery

Inquiry
12
Bluetooth 2.1

• Bluetooth 2.0
• Peer Discovery

Inquiry
13
Bluetooth 2.1

• Bluetooth 2.0
• Peer Discovery

Inquiry Response
14
Bluetooth 2.1

• Bluetooth 2.0
• Paging

Exchange device information Channel
synchronization
15
Bluetooth 2.1

• Bluetooth 2.0
• Connected

Connection established Data delivery
16
Bluetooth 2.1

• Bluetooth 2.1
• Peer Discovery

Inquiry
17
Bluetooth 2.1

• Bluetooth 2.1
• Peer Discovery

Inquiry
18
Bluetooth 2.1

• Bluetooth 2.0
• EIR Data Delivery

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?