Browsing by Author "Chuang, Bing-Wen"

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A relay node deployment method for disconnected wireless sensor networks: Applied in indoor environments
(2009-05-01)
Tarng, Jenn-Hwan
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Chuang, Bing-Wen
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Liu, Pei-Chen
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電信工程研究所
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Institute of Communications Engineering
In this paper. a 2-D geometric and adaptive relay node deployment method with polynomial-time complexity is proposed to reduce relay nodes for bridging all disconnected node pairs of a wireless sensor network (WSN). In this method, proper locations for placing relay nodes are discovered on a plane, which gives a much larger degree of freedom to compare with the traditional 1-D search algorithm. In this way, the deployed relay node can bridge as many disconnected node pairs as possible around it. Besides, the method can also adapt to radio environments because that a sophisticated propagation model including large-scale path loss, shadowing, and multipath fading effects is used to estimate link connectivity. Simulation result validates its robustness and efficiency compared with the existing relay node deployment methods. The proposed method significantly reduces the total number of relay nodes compared with the related works in all of the investigated indoor environments. (C) 2008 Elsevier Ltd. All rights reserved.
Investigation of vehicle-to-infrastructure communications based on IPv6-based automotive telematics
(2007)
Tarng, Jenn-Hwan
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Chuang, Bing-Wen
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電信工程研究所
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Institute of Communications Engineering
Automotive telematics is expected to be prevalent due to both market pull and technology push driving forces. By considering ITS networking needs, auto-telematics should provide mobile Internet services for fulfill these needs, and IPv6-based auto-telematics might effectively achieve IP ubiquity and network mobility, which are key technologies for mobile Internet. In this study, an IPv6-based automotive telematics is developed to investigate IPv6 networking systems for ITS. The prototype is made for field trials and performance evaluation purposes.