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A Hybrid MAC Scheme to Improve the Transmission Performance in Body Sensor Networks

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Abstract

Wireless body sensor networks (WBSNs) constitute a key technology for closing the loop between patients and healthcare providers, as WBSNs provide sensing ability, as well as mobility and portability, essential characteristics for wide acceptance of wireless healthcare technology. However, one important and difficult aspect of WBSNs is to provide data transmissions with quality of service, among other factors due to the antennas being small size and placed close to the body. Such transmissions cannot be fully provided without the assumption of a MAC protocol that solves the problems of the medium sharing. A vast number of MAC protocols conceived for wireless networks are based on random or scheduled schemes. This paper studies firstly the suitability of two MAC protocols, one using CSMA and the other TDMA, to transmit directly to the base station the signals collected continuously from multiple sensor nodes placed on the human body. Tests in a real scenario show that the beaconed TDMA MAC protocol presents an average packet loss ratio lower than CSMA. However, the average packet loss ratio is above 1.0 %. To improve this performance, which is of vital importance in areas such as e-health and ambient assisted living, a hybrid TDMA/CSMA scheme is proposed and tested in a real scenario with two WBSNs and four sensor nodes per WBSN. An average packet loss ratio lower than 0.2 % was obtained with the hybrid scheme. To achieve this significant improvement, the hybrid scheme uses a lightweight algorithm to control dynamically the start of the superframes. Scalability and traffic rate variation tests show that this strategy allows approximately ten WBSNs operating simultaneously without significant performance degradation.

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References

  1. Alemdar, R. H., & Ersoy, C. (2010). Wireless sensor networks for healthcare: A survey. Journal of Computer Networks, 54, 2688–2710.

    Article  Google Scholar 

  2. Yigitel, M., Incel, O., & Ersoy, C. (2011). QoS-aware MAC protocols for wireless sensor networks: A survey. Journal of Computer Networks, 55(8), 1982–2004.

  3. Demirkol, I., Ersoy, C., & Alagoz, F. (2006). MAC protocols for wireless sensor networks: A survey. IEEE Communications Magazine, 44(4), 115–121.

    Article  Google Scholar 

  4. IEEE 802.15.4-R2006 (2006). Part 15.4: Wireless medium access control (MAC) and physical layer (PHY) specifications for low-rate wireless personal area networks.

  5. IEEE 802.15.6 (2012). Part 15.6: Wireless body area networks.

  6. Standard ECMA-368 (2005). High rate ultra wideband PHY and MAC standard. http://www.ecma-international.org/

  7. Pister, K., & Doherty, L. (2008). TSMP: Time synchronized mesh protocol. In Proceeding of international symposium on distributed sensor networks, Orlando, Florida, U.S.A.

  8. Suriyachai, P., Brown, J., & Roedig, U. (2010). Time-critical data delivery in wireless sensor networks. In Proceedings of conference on distributed computing in sensor systems, Santa Barbara, California.

  9. Suriyachai, P., Roedig, U., & Scott, A. (2012). A survey of MAC protocols for mission-critical applications in wireless sensor networks. IEEE Communications Surveys & Tutorials, 14(2), 240–264.

    Article  Google Scholar 

  10. Rhee, I., Warrier, A., Aia, M., & Min, J. (2005). Z-MAC: A hybrid MAC for wireless sensor networks. In 3rd ACM conference on embedded networked sensor systems, San Diego, U.S.A.

  11. Latré, B., Braem, B., Moerman, I., Blondia, C., & Demeester, P. (2011). A survey on wireless body area networks. Wireless Networks (Vol. 17, pp. 1–18). Netherlands: Springer.

  12. Fort, A., Ryckaert, J., Desset, C., Doncker, P., Wambacq, P., & Biesen, L. (2006). Ultra-wideband channel model for communication around the human body. IEEE Journal on Selected Areas in Communications, 24, 927–933.

    Article  Google Scholar 

  13. Roelens, L., Bulcke, S., Joseph, W., Vermeeren, G., & Martens, L. (2006). Path loss model for wireless narrowband communication above flat phantom. Electronics Letters, 42(1), 10–11.

    Article  Google Scholar 

  14. Gama, O., Carvalho, P., & Mendes, P. M. (2012). Design of a MAC protocol for e-emergency WSNs. In 6th symposium of ubiquitous computing and ambient intelligence (UCAm I’12), Vitoria, Spain.

  15. Ullah, S., & Kwak, K. S. (2010). Performance study of low-power MAC protocols for wireless body area networks. In IEEE 21st international symposium on personal, indoor and mobile radio communications workshops, Istanbul, Turkey.

  16. Cavalcanti, D., Schmitt, R., & Soomro, A. (2007). Performance analysis of 802.15.4 and 802.11e for body sensor network applications. In Proceedings of 4th international workshop on wearable and implantable body sensor networks, Aachen, Germany.

  17. Martelli, F., Buratti, C., & Verdone, R. (2011). On the performance of an IEEE 802.15.6 wireless body area network. 11th European wireless conference 2011—sustainable wireless technologies (European wireless) , (Vol. 1(6), pp. 27–29).

  18. Kotz, D., Newport, C., Gray, R. S., Liu, J., Yuan, Y., & Elliott, C. (2004). Experimental evaluation of wireless simulation assumptions. In International conference on modeling, analysis and simulation of wireless & mobile systems, ACM, New York, USA.

  19. Gama, O., Carvalho, P., & Mendes, P. (2011). A model to improve the accuracy of WSN simulations. In 9th international conference on wired/wireless internet communications, Vilanova i la Geltru, Spain.

  20. Shah, R. C., Nachman, L., & Wan, C. (2008). On the performance of bluetooth and IEEE 802.15.4 in a body area network. In Proceedings of the ICST 3rd international conference on body area networks.

  21. Fernandez-Lopez, H., Afonso, J. A., Correia, J. H., & Simoes, R. (2012). Towards the design of efficient nonbeacon-enabled ZigBee networks. Computer Networks, 56, 2714.

    Article  Google Scholar 

  22. Fernandez-Lopez, H., Afonso, J. A., Correia, J. H., & Simoes, R. (2014). Wireless vital signs monitoring based on ZigBee: Lessons from a real-world deployment. Telemedicine and e-Health, 20, 47.

    Article  Google Scholar 

  23. Afonso, A., Rocha, L. A., Silva, H. R., & Correia, J. H. (2006). MAC protocol for low-power real-time wireless sensing and actuation. In Proceedings of 11th IEEE conference on electronics, circuits and systems, Nice, France.

  24. ZigBit OEM Modules ZDM-A1281-*. http://www2.ee.ic.ac.uk/t.clarke/projects/Resources/BitCloud/M-251~01-(ZigBit%20OEM%20Module%20Product%20Datasheet).pdf.

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Acknowledgments

Project “AAL4ALL”, co-financed by the European Community Fund FEDER through COMPETE—Programa Operacional Factores de Competitividade (POFC). Foundation for Science and Technology, Lisbon, through project PEst-C/CTM/LA0025/2013.

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Correspondence to Oscar Gama.

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Gama, O., Simoes, R. A Hybrid MAC Scheme to Improve the Transmission Performance in Body Sensor Networks. Wireless Pers Commun 80, 1263–1279 (2015). https://doi.org/10.1007/s11277-014-2086-3

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