無標題文件


畢業生

博士畢業生  

 

 

姓名 吳連文

博士論文口試時間

2006.01.12

學歷

國立台灣工業技術學院 電機工程學士與碩士
國立中山大學 電機工程博士


經歷(服務公司)

 

中華電信訓練所台中分所傳輸科講師
中華電信訓練所高雄分所網路科講師

現職


樹德科技大學資訊工程系助理教授

博士論文題目

Performance Prediction Models for Rate-based and Window-based Flow Control Mechanisms


博士論文摘要

In this dissertation, we present performance prediction models for rate-based and window–based flow control mechanisms. For rate-based flow control, such as in ATM network, we derive two analytical models to predict the ACR rates for congestion-free and heavy congestion networks, respectively. To coordinate the cooperative problems of TCP over ATM networks, we propose a new algorithm to monitor the states of ATM switches and adjust TCP congestion window size based on RM cells.

For window-based flow control mechanisms, such as in TCP-Reno and TCP-SACK, we respectively present analytical models to systematically capture the characteristics of multiple consecutive packet losses in TCP windows. Through fast retransmission, the lost packets may or may not be recovered. Thus, w e present upper bound analyses for slow start and congestion avoidance phases to study the effects of multiple packet losses on TCP performance . Above the proposed upper bounds, the lost packets may not be successfully recovered through fast retransmission. Finally, we develop a model to study the TCP performance in terms of throughput degradation resulted from multiple consecutive packet losses. The analytical results from the throughput degradation model are validated through OPNET simulation.

Keywords ATM , FECN, Flow control, Rate-based, TCP-Reno, TCP-SACK, Throughput degradation, Window-based.

 

Publication List

Journal Papers:

1. Tsang-Ling Sheu and Lien-Wen Wu , "A Performance Prediction Model for FECN Rate-based Flow Control in ATM Networks: a Case Study," Computer Communications, Vol. 25, No. 14, pp. 1323-1332, Sep. 2002.

2. Tsang-Ling Sheu and Lien-Wen Wu , "Modeling of Multiple TCP Segment Losses in Slow Start and Congestion Avoidance phases," Accepted by Journal of Information Science and Engineering, Oct. 2005

3. Tsang-Ling Sheu and Lien-Wen Wu,"A Throughput Degradation Model under Multiple Consecutive Packet Losses for TCP-SACK,"Journal of the Chinese Institute of Engineers (JCIE), accepted for publications, Sep. 2006.

4. Tsang-Ling Sheu and Lien-Wen Wu,"An Analytical Model of Fast Retransmission and Recovery in TCP-SACK,"Performance Evaluation, accepted for publications, Jul. 2006.

 

Conference Papers:

1. Lien-Wen Wu and Tsang-Ling Sheu, "Flow Control Mechanism for Integrated TCP and ATM Networks," ICOIN 14, ShinChu , Taiwan , Jan. 2000.

2. Tsang-Ling Sheu and Lien-Wen Wu , "Analytical Modeling of Fast Retransmission and Recovery in TCP-Reno," IEEE ICON, Singapore , Nov. 2004.

 

畢業感言


研究的路有時是孤獨的,別人在玩的時候,你在做研究。寒冬中別人可以躲在溫暖的被窩裡,
你卻要忍著寒意做研究。夜深了,別人正進入甜美的夢鄉時,你要奮力的抵抗一波波侵襲著你
的睡意,繼續完成未了的研究。這些種種均考驗著你的耐力與意志力。所以個人以為做研究必
須時時抱持著:
積極的態度 、努力不懈的精神,最重要的是要有一顆堅持的心,做研究可能是條漫長的路,不
能堅持終將成為泡影。 最後要抱持樂觀的態度,不管結果如何都要接受它,畢竟它是你努力過的。
願共勉之!!


E-mail

wlw@atm.ee.nsysu.edu.tw

E-mail

lwwu@stu.edu.tw

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