Implementing IEEE 802.15.4-based
Communications in Sensor Nodes aimed for
Biomedical Signal Monitoring
Gustavo Meneses Ben...
Abstract
We present the most significant issues found during
the implementation of IEEE 802.15.4-based
communications in a...
Communications
for
Wireless
Sensor Networks for Biomedical
Signal Monitoring
MiWi™:
Microchip’s IEEE 802.15.4-Based
Protocol
MiWi™ protocol is a lightweight choice which allows
us incorporating midra...
IEEE 802.15.4
 IEEE 802.15.4 (2003)
 IEEE 802.15.4 A (2006)
EnViBo Wireless Sensor Network
Sensor Nodes
PAN Coordinator
Implementing IEEE 802.15.4
Communications
MPLAB Project coding
MAC PDU Structure
Packet Header Format
Packet Header Example and
Color Code of the sniffer
Testing Network Performance
with Packet Sniffer
Simplified Handshacking
Packet Transfer Between Nodes
…SOME RESULTS
 Firmware: C18 & C30 based (8bit-16 bit

MCUs)
(for Sensor Nodes and PAN Coordinator)
 Circuit Designs
(Sc...
Platform User Interface
CONCLUSIONS
 Significant adjustments over the base code files provided by









Microchip to build a wireless mon...
REFERENCES
 H. Alemdar, C. Ersoy, “Wireless sensor networks for healthcare: A

survey”, Computer Networks, pp 2688-2710, ...
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  1. 1. Implementing IEEE 802.15.4-based Communications in Sensor Nodes aimed for Biomedical Signal Monitoring Gustavo Meneses Benavides Colombia
  2. 2. Abstract We present the most significant issues found during the implementation of IEEE 802.15.4-based communications in a set of wireless sensor nodes developed for biomedical signal monitoring. The technical specifications of the Personal Area Network Coordinator and these of a body temperature sensor node are described. .. …in order to provide a monitoring instrument to conduct experiments which could provide useful information for individuals and researchers.
  3. 3. Communications for Wireless Sensor Networks for Biomedical Signal Monitoring
  4. 4. MiWi™: Microchip’s IEEE 802.15.4-Based Protocol MiWi™ protocol is a lightweight choice which allows us incorporating midrange microcontrollers in this application and take advantage of a simplified version of IEEE 802.15.4, better suited to our smallsized, low cost network implementation. …IEEE 802.15.4 compliant RF transceivers and a set of microcontroller references compatible with the MiWi protocol available at reasonable costs from a variety of suppliers in our country .
  5. 5. IEEE 802.15.4  IEEE 802.15.4 (2003)  IEEE 802.15.4 A (2006)
  6. 6. EnViBo Wireless Sensor Network
  7. 7. Sensor Nodes
  8. 8. PAN Coordinator
  9. 9. Implementing IEEE 802.15.4 Communications
  10. 10. MPLAB Project coding
  11. 11. MAC PDU Structure
  12. 12. Packet Header Format
  13. 13. Packet Header Example and Color Code of the sniffer
  14. 14. Testing Network Performance with Packet Sniffer
  15. 15. Simplified Handshacking
  16. 16. Packet Transfer Between Nodes
  17. 17. …SOME RESULTS  Firmware: C18 & C30 based (8bit-16 bit MCUs) (for Sensor Nodes and PAN Coordinator)  Circuit Designs (Schematics and PCB)  System’s Gateway Design  User Interfaces (Labview , ------>Android OS)  Tests  EnViBo Platform Proposal
  18. 18. Platform User Interface
  19. 19. CONCLUSIONS  Significant adjustments over the base code files provided by      Microchip to build a wireless monitoring network that can operate under the IEEE 802.15.4-based Microchip’s MiWi protocol. Network roles tested with prototypes for the PAN coordinator and sensor nodes capturing vital signs like body temperature. A comprehensive work to add functions and coding to implement the features specific to network elements according to their role and function level within the monitoring system proposed. Tests conducted on different prototype boards have allowed to improve the designs and put into operation a reduced-size/lowpower optimized version of sensor node, which meets our requirements User interfaces are available in some test nodes through LCD modules, and in a computer as a virtual instrument interface. Data logging options are available (microcontroller’s data EEPROM, SD card, in the computer by using data in time & date
  20. 20. REFERENCES  H. Alemdar, C. Ersoy, “Wireless sensor networks for healthcare: A survey”, Computer Networks, pp 2688-2710, 2010.[2] H. Labiod, H. Afifi, C. de Santis, Wi-Fi, Bluetooth, Zigbee and Wimax, Springer, 2007, ch. 1-4.  P. Baronti, P. Pillai, V. Chook, S. Chessa, A. Gotta, Y. Fun Hu, “Wireless sensor networks: A survey on the state of the art and the 802.15.4 and ZigBee standards”, Computer Communications, pp. 1665- 1695, 2006.  A. García, J. Martínez, J. Lopez, A. Prayati, L. Redondo, Problem Solving for Wireless Sensor Networks. London: Springer-Verlag, 2008, ch 6.  MiWi™ Wireless Networking Protocol Stack, Aplication Note AN1066 (David Flowers and Yifeng Yang), Microchip Technology, 2010  S. Hsu, H. Wu, S. Chen, T. Liu, W. Huang, Y. Chang, C. Chen, Y. Chen, “Development of Telemedicine and Telecare over Wireless Sensor Network”, in Proceedings of the International Conference Multimedia and Ubiquitous Engineering, 2008, pp. 597-604  Draft Guidance for Industry and FDA Staff: Radio-Frequency Wireless Technology in Medical Devices, Draft released for comment on January 3, 2007.  A. Dinh, “Heart Activity Monitoring on Smartphone”, in Proceedings of

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