本論文旨在於無線人體感測網路中針對干擾問題提出有效的解決辦法。雖然在IEEE 802.15.6 標準中已經定義了一些解決方法，這些方法卻可能帶來傳輸時的延遲以及額外的能量消耗，並且其無法有效地防止干擾發生。為了同時能解決「同一個網路內」與「不同網路之間」的干擾，我們為無線人體感測網路設計了一個兩層式的媒介存取控制協定，名為2L-MAC。
考慮到無線人體感測網路的服務品質要求， 我們提出的方法不只能避免封包的碰撞同時能減少傳輸上的的延遲以及節點的能量消耗。除此之外，當通道的頻寬不足時，我們所設計的channel switching機制可以讓整個網路變換其運作的通道。模擬的結果證實，我們所提的協定相較於其他方法有更佳的成功傳輸率、更短的延遲以及更好的節能效果。

[1] IEEE 802.15 WPAN Task Group 6 Body Area Network (BAN). Available online: http://www.ieee802.org/15/pub/TG6.html
[2] H. Viswannthan, B. Chen and D. Pompili, “Research Challenge in Computation, Communication, and Context Awareness for Ubiquitous Healthcare,” IEEE Communication Magazine, pp. 92–99, May 2012.
[3] A Bolis, D. Smith, D. Miniutti, L. Libman, and Y. Tselishchev, “Challenges in body area networks for healthcare: the MAC,” IEEE Communications Magazine, vol. 50, no. 5, pp.100–106, 2012.
[4] H. Li and J. Tan, “Heartbeat Driven Medium Access Control for Body Sensor Networks,” Proceedings of the 1st ACM SIGMOBILE international workshop on Systems and networking support for healthcare and assisted living environments, Puerto Rico, US., pp. 25–30, Jun. 2007.
[5] S. Cheng and C. Huang, “Coloring-Based InterWBAN Scheduling for Mobile Wireless Body Area Network,” IEEE Transactions on Parallel and Distributed Systems, vol.14, pp. 250–259, Apr. 2012.
[6] P. R. Grassi, V. Rana, I. Beretta and D. Sciuto, “B²IRS: A Technique to Reduce BAN-BAN Interferences in Wireless Sensor Networks,” Proceedings of the International Conference on Wearable and Implantable Body Sensor Networks, pp. 46–51, May 2012.
[7] S. Cheng, C. Huang and C. Tu, “RACOON: A Multiuser QoS Design for Mobile Wireless Body Area Networks,” Journal of Medical Systems, vol. 35, pp. 1277–1287, 2011.
[8] H. Li and J. Tan, “An Ultra-low-power Medium Access Control Protocol for Body Sensor Network,” Proceedings of the 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, Shanghai China, Sep. 2005.
[9] C. Tachtatzis, F. Franco, D. Tracey, N. Timmons and Jim Morrison, “An Energy Analysis of IEEE 802.15.6 Scheduled Access Modes for Medical Applications,” Proceedings of the Third International ICST Conference, ADHOCNETS 2011, Paris, France, Sep. 2011.
[10] A. Varga, “The OMNeT++ Discrete Event Simulation System,” Proceedings of the European Simulation Multi-Conference, Czech Republic, 6–9 June 2001.
[11] D. B. Smith, D. Miniutti, and L.W. Hanlen, “Characterization of the Body-Area Propagation Channel for Monitoring a Subject Sleeping,” IEEE Transactions on Antennas and Propagation, pp. 4388–4392, 2011.
[12] D. Kim and J. Cho, “WBAN meets WBAN: smart mobile space over wireless body area networks,” Proceedings of the IEEE Vehicular Technology Conference, Fall, Anchorage, pp. 1–5, 2009.
[13] “MiXiM Network Simulation Model.” Available online: http://mixim.sourceforge.net/
[14] B. Kim and J. Cho, “A Novel Priority-based Channel Access Algorithm for Contention-based MAC Protocol in WBANs,” Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication, Feb. 2012.