無標題文件


畢業生

博士畢業生  

 

 

姓名 盧怡仁

博士論文口試時間

2009.06.02

學歷

0 交通大學電信系

交通大學電信研究所

中山大學電機博士


經歷(服務公司)

AltiGen Communications


現職

DSP / firmware engineer at AltiGen Communications


博士 論文題目

Lifetime Maximization Schemes with Optiomal Power Control for Multimedia Traffic in Wireless Sensor Network


博士論文摘要

Power saving for extending session lifetime is an important research subject in wireless sensor networks (WSNs). Recognizing the fact that Quality of Service can be deteriorated by insufficient transmit power, this work studies how to minimize power consumption while achieve a satisfactory QoS of data streams in WSNs. A cross-layer routing scheme is proposed to maximize session lifetime by adjusting individual transmit power on intermediate nodes. The thesis is divided into two major parts for analyzing our proposition. In the first part, we propose an efficient routing scheme with optimal power management and on-demand quality control for WSNs. When source node issues a QoS provision for route discovery, an adjustment of transmit power is computed for each pass-by node by taking into its individual wireless link account. Then, an optimal route associated with lowest power consumption and consistent QoS can be selected among all of the candidate routes.

In the second part, by following the definition of QoS criterion in the first part, we further consider the problem of how to balance the needs on constraining end-to-end quality and prolonging lifetime in an established route. The problem can be interpreted as a non-linear optimization paradigm, which is then shown to be a max-min composite formulation. To solve the problem, we propose two methods, (1) route-associated power management (RAPM), and (2) link-associated power management (LAPM). Considering computation-restricted sensor nodes, the RAPM scheme is two-fold simplification; not only it can reduce power computation, but it also quickly determines the longest lifetime and proper transmit power for nodes. On the other hand, if computational cost is not a major concern in a sink node, the LAPM algorithm is more suitable than RAPM to solve the lifetime maximization problem, in terms of accuracy. Finally, we analyze the performance of these two methods. The results demonstrate that the LAPM scheme is very comparable to a heuristic approach.

 

Publication List

Publication List: Journal Paper:

1. Yi-Jen Lu and Tsang-Ling Sheu, "Lifetime Maximization Schemes under End-to-End Frame-Error Constraints in Wireless Multimedia Sensor Networks," in Wireless Communications & Mobile Computing, Mar. 2009. (SCIE, 2007 Impact Factor = 1.225)

2. Yi-Jen Lu and Tsang-Ling Sheu, "An Efficient Routing Scheme with Optimal Power Control in Wireless Multi-hop Sensor Networks," Computer Communications, Vol. 30, No. 14-15, pp. 2735-2743, Oct. 2007. (SCIE, 2006 Impact Factor = 0.444)

Conference Paper:

1. Yi-Jen Lu, Chi-Jen Huang, and Tsang-Ling Sheu, "Three-color Marking with MLCN for Cross-layer TCP Congestion Control in Multi-hop Mobile Ad Hoc Networks," Int'l Conference on New Technologies, Mobility and Security (NTMS), Paris, France, May 2007.

2. Tsang-Ling Sheu and Yi-Jen Lu, "Effective Power Control for Multimedia Streaming with QoS Constraints in Heterogeneous Networks," IEEE Wireless Communications and Networking Conference (WCNC), Hong Kong, Mar. 2007.

3. Tsang-Ling Sheu and Yi-Jen Lu, "Power Minimization with End-to-End Frame Error Constraints in Wireless Multi-hop Sensor Networks," IEEE/ACM Int'l Wireless Communications and Mobile Computing (IWCMC) Conference, Vancouver, Canada, Jul. 2006.

 

E-mail

yijenlu@yahoo.com

自我介紹

http://cuger.spaces.live.com

Book:

Yi-Jen Lu and W. H. Tsai, “數位信號處理平台在嵌入式系統的應用”, 文魁出版社, 2006

Yi-Jen Lu and W. H. Tsai, “單晶片於數位信號處理的應用”, 文魁出版社, 2007




   

 
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