隨著人們對行動網路的需求愈來愈高，各項無線網路接取技術也日漸成熟，因此如何提供使用者在各類型的行動網路之間進行交遞時，仍保有一定的連線品質，已經成為現今重要的研究議題。TCP是現在最為廣泛使用的傳輸協定，然而TCP原本的設計原則在有線與無線混合的傳輸環境中反而產生許多問題，尤其在網路進行交遞時更為嚴重。因此本文針對這些問題提出改善的方法，並利用模擬分析加以證明本文提出的方法能確實提升交遞時期的傳輸效能。

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第一章 緒論 ............................................................................................................... 1
1-1 簡介 .............................................................................................................. 1
1-2 研究動機 ........................................................................................................ 4
1-3 背景介紹 ........................................................................................................ 5
1-4 論文大綱 ........................................................................................................ 8
第二章 相關研究 ....................................................................................................... 9
2-1 連線分段法 .................................................................................................... 9
2-1-1 Indirect-TCP(I-TCP)[1] ....................................................................... 9
2-1-2 Snoop Protocol[4] .............................................................................. 11
2-1-3 New Snoop(NS)[6] ............................................................................. 13
2-2 根據網路特性調整傳輸速率 ...................................................................... 14
2-2-1 TCP Quick-Start[8] ............................................................................ 14
2-2-2 TCP Quick-Adjust[5] ......................................................................... 15
2-3 其他相關研究 .............................................................................................. 16
第三章 研究方法 ..................................................................................................... 18
3-1 TCP傳輸在交遞時期所遭遇的問題 ........................................................... 18
3-2 研究方法 ...................................................................................................... 21
3-3 數學分析 ...................................................................................................... 28
第四章 模擬與分析 ................................................................................................. 32
4-1 模擬軟體與參數設定 .................................................................................. 33
4-2 模擬結果與分析 .......................................................................................... 35
第五章 結論................................................................................................................ 43
參考文獻...................................................................................................................... 44

[1] Ajay Bakre, and B.R. Badrinath,“I-TCP: Indirect TCP for Mobile Hosts,”Proc. of the 15th International Conference on Distributed Computing System, 1995, pp 136-143.
[2] Dimopoulou L., Leoleis G., Venieris I.O.,” Fast handover support in a WLAN environment: challenges and perspectives,” IEEE Network, Vol. 19, Issue 3, May 2005, pp 14-20.
[3] Hari Balakrishnan, Srinivasan Seshan, Elan Amir and Randy H. Katz,“Improving TCP/IP Performance over Wireless Networks,” Proc. of the ACM MOBICOM, November 1995.
[4] Ji Zhang, Jouni Korhonen, SooHong Park, and David Pearce, “TCP Quick-Adjust by Utilizing Explicit Link Characteristic Information,” 22nd International Conference on Advanced Information Networking and Applications, April 2008, pp 1291-1298.
[5] Jian-Hao Hu, Gang Feng, and Kwan Lawrence Yeung, “Hierarchical Cache Design for Enhancing TCP Over Heterogeneous Networks With Wired and Wireless Links,”IEEE Transactions on Wireless Communication, Vol. 2, March 2003, pp 205-217.
[6] Michele Luglio, Cesare Roseti, Gianluca Savone, and Francesco Zampognaro, “Cross-Layer Architecture for a Satallite─Wi-Fi Efficient Handover”, IEEE Transaction on Vehicular Technology, Vol. 58, NO. 6, July 2009.
[7] Pasi Sarolahti, and Jouni Korhonen, “Using Quick-Start to Improve TCP Performance with Vertical Hand-offs,”RFC 4782, January 2007.
[8] R. Koodli, Ed., “Fast Handovers for Mobile IPv6,” RFC 4068, July 2005.
[9] Shaojian Fu, Atiquzzaman M., “Handover latency comparison of SIGMA, FMIPv6, HMIPv6, FHMIPv6,” Global Telecommunications Conference, 2005, November 2005, Vol. 6, pp 3809-3813.