• 沒有找到結果。

Future Works

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Chapter 5 Conclusions and Future Work

5.2 Future Works

Based on above results of this study, some future works are suggested:

Establishing Multiuser WBAN channel model

This study only applies simple shading models for the calculation of interference. In real world, multiple human bodies may cause very complicated shadowing effect and hence the proposed methods in this study might need further adjustments. However, most existing WBAN channel models can only calculate the attenuation caused by one human body [56]. The bottleneck of multi-user channel model study is numerous combinations of input parameters. Different user positions, angles, gestures, and body shapes all affect attenuation level. Furthermore, there are many imperfect effects on reflection, scattering, radiation, and coupling of human body, which make the rule of attenuation hard to be summarized and simplified. To our best understanding, existing channel models can consider only up to two human bodies [57]. It is still complicated and far from

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the n-user model required in our study. For this reason, radio attenuation due to human body is temporally ignored in this study and hence the multi-user WBAN resource allocation problem can be more focused.

Integrating medical and legal knowledge for WBAN QoS control

In the proposed multi-WBAN QoS control, the real priorities between various vital signals and alarm threshold (priority enhance) still relies on medical experiences. Also, a complete WBAN QoS might be accompanied with dynamic signal quality scheme. For example, with very limited wireless resource, an ECG sensor might optionally switch to lower resolution mode. However, what is the limit of the degradation of signal quality? The answer may vary with difference target syndromes.

This relies on more practices and understanding of working flow of medical scenes. Finally, will the priority controls between involve legal issues? Since priority scheme implies sacrifices among measured signals in some critical situations. The prioritizing procedure may involve human life.

Hence, related designs might involve technology, medical, and legal knowledge. Of course, backup procedure may be necessary in such sensitive applications.

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List of Publications

Key Technology One: Multiuser Inter WBAN Scheduling Publications:

1. ShihHeng Cheng,ChingYao Huang, “Power model for wireless body area network,”Biomedical Circuits and Systems Conference, Baltimore, MD, Nov, 20-22, 2008.

2. ShihHeng Cheng,MeiLing Liu, ChingYao Huang,“Radar Based Network Merging for Low Power Mobile Wireless Body Area Network,”4th International Symposium on Medical Information and Communication Technology, Taipei, Mar, 22-25, 2010.

3. C. Y. Huang, M. L. Liu, and S. H. Cheng, “WRAP: A Weighted Random Value Protocol for Multiuser Wireless Body Area Network,” in International Symposium on Information Theory and its Applications and International Symposium on Spread Spectrum Techniques and

Applications, Taichung, Taiwan, 2010, pp. 116-119.

4. ShihHengCheng,ChingYao Huang, “Coloring-Based Inter-WBAN Scheduling for Mobile Wireless Body Area Network," IEEE Transactions on Parallel and Distributed Systems, vol. 99 (Accepted; Early Access)

5. ShihHeng Cheng, Chun Chen Tu, and ChingYao Huang, “RACOON: A Multiuser QoS design for Mobile Wireless Body Area Networks”, Journal of Medical Systems, vol. 35, no. 5, pp.

1277-1287, 2011 Standard Contributions:

1. ShihHeng Cheng, ChingYao Huang, “Network Merging : Design Strategies of An Ultra Low Power and High Reliability MAC (15-09-0227-00-0006),” Standard Meeting: IEEE 802.15 TG6 Wireless Body Area Network (WBAN) 2009, March 9-13, Vancouver.

Patents:

1. 黃經堯, 程士恒, “多無線網路間的封包碰撞避免技術, Method for packet collision avoidance between multiple wireless network,” 2008, JP issued; TW, US, CN Pending.

Key Technology Two: WBAN Channel Measurement and Modeling Publications:

1. ChingYao Huang,JhihCiangCai, ShihHeng Cheng, Wei Chou, “A Time Based Two-State Channel Model for Dynamic Wireless Body Area Networks,”4th International Symposium on Medical Information and Communication Technology, Taipei, Mar, 22-25, 2010.

Standard Contributions:

1. JhihCiangCai, ShihHeng Cheng, ChingYao Huang, “MAC Channel Model for WBAN

(15-09-0562-00-0006),” Standard Meeting: IEEE 802.15 TG6 Wireless Body Area Network (WBAN) 2009, July 12-17, San Francisco

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Key Technology Three: Applications of WBANs Patents:

1. 黃經堯, 程士恒, “防盜用圖章, Method and Apparatus for Anti-steal Stamp,” 2008, TW Patent (Pending).

2. 李鎮宜, 陳瑞杰, 黃經堯, 游瑞元, 莊子宗, 程士恒, “緊急醫療用無線心電貼片, First Aid Wireless ECG Pad,” 2010 (Pending).

3. 程士恒, “心電訊號處理裝置,” 2012, TW Patent (Pending)

Competition:

1. 李鎮宜, 黃經堯, 宋偉豪, 程士恆, 李曜, “防盜用圖章,” 2008 ARM Code-O-Rama 設計 大賽亞軍.

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