WBAN Wireless Body Area Network for Health Monitoring

					  Wireless Body Area Network
  for Health Monitoring


Emil Jovanov, Chris Ott, Aleksandar Milenkovic
     Electrical and Computer Engineering
   The University of Alabama in Huntsville
         email: jovanov@ece.uah.edu
   Web: http://www.ece.uah.edu/~jovanov
WBAN: Motivation
   Goal: ubiquitous and affordable healthcare
   Conditions: demographic and technology trends
   Solution: 3-tier ubiquitous monitoring system
    – Tier 1: Wireless Body Area Network (WBAN)
    – Tier 2: Personal Server
    – Tier 3: Healthcare Provider Servers
   Opportunities:
    – Ambulatory health monitoring
    – Computer-assisted rehabilitation
    – Augmented reality systems
   Long-term benefits:
    – Promote healthy lifestyle
    – Seamless integration of data into personal medical
      records and research databases
    – Knowledge discovery through data mining
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Ubiquitous Health Monitoring




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3-tier Hierarchical Organization




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  ActiS: Activity Sensor
            ISPM                                Telos

  ADXL202                                                 CC2420
Accelerometer                                             (ZigBee)
                       TI
  ADXL202          MSP430F1232         TI                  Flash
Accelerometer                      MSP430F149
 ECG Signal
                                                        USB Interface
 Conditioning



ECG electrodes




                     ActiS as
                   Motion Sensor
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       ActiS: Signal Processing
                             Accelerometer based step recognition
                                                                                       Vy[m/s]
1.6                                                                                    Alpha[rad]
                                                                                       accY[g]
                                                                                       Step
                                                                                       Foot switch
1.4

                                                          Step detected

1.2



  1



0.8



0.6



0.4



0.2



  0



-0.2



-0.4




   46     46.5   47   47.5         48         48.5       49         49.5   50   50.5                 51
                                            Time[s]
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       ActiS: Communication Timing
            ...   Cycle #9      Cycle #10       Cycle #1   Cycle #2    Cycle #3
   Telos
   ISPM
CC2420 Rx
CC2420 Tx




                             Start Radio         Transmit Stop Radio

                                        6 ms              3.5-8 ms   400 us


                                                   Start        Transmit Stop
                                                   Done         Done     Done


                                                Problem: USART sharing!
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Issues in WBAN
   Affordable and ubiquitous monitoring
    – Utilize common off-the-shelf components,
      capable of seamless integration into a WBAN
   Open issues
    – Standardization of sensors
      (specificity, range, precision, type)
    – Rules of engagement and sensor placement
    – Sensor calibration & customization
    – Integration of data into medical databases
    – Privacy and security
   Social impact and business opportunities
Working group for Health-Monitoring Applications (Tiny-HMS)
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Historical Overview
 Basic WISE (Y00)             Reconfigurable SpO2 Sensor (Y04)
                                    Signal Conditioning                              RS232 Interface




                                       Finger Probe        Programmable Logic   Microcontroller




WHRM



                          MOGUL                           Distributed Stress
                                                          Monitoring (Y03)
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posted:11/16/2011
language:English
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