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    题名: Improving SCTP End-to-End Performance in Wireless Network
    改善SCTP協定於無線網路中點對點效能之研究
    作者: 徐富寬
    Hsu ,Fu-Kuan
    贡献者: 張宏慶
    徐富寬
    Hsu ,Fu-Kuan
    关键词: SCTP
    Changeover
    日期: 2005
    上传时间: 2009-09-11 16:05:05 (UTC+8)
    摘要: SCTP (Steam Control Transmission Protocol)是由IETF[2]提出在傳輸層的新機制。SCTP像TCP一樣提供擁塞控制機制(congestion control mechanism)。此外，SCTP提供Multi-Homing和Multi-Streaming兩個TCP所缺乏的重要機制。然而，SCTP和TCP一樣無法分辨當快速重傳機制(Fast-Rtx)或是Timeout機制啟動時，packet-loss發生的真正原因，如瞬間的通道錯誤或因網路擁塞引起的封包拋棄。於此，SCTP會不正確地啟動擁塞控制機制來防止網路擁塞狀況的持續惡化。
    本篇論文目的在於改善SCTP在無線網路所遭遇效能低落的問題。我們提出三種解決問題的機制，分別是SCTP-EnhancedProbing、SCTP-Duplicate 及SCTP-Changeover。SCTP-EnhancedProbing機制是一種點對點的方法，用以判斷packet-loss發生的真正原因。SCTP-Duplicate機制則藉由multi-homing機制來幫助提升SCTP-EnhancedProbing機制的效能。SCTP-Changeover機制則是一個必要的方法來補足SCTP-Duplicate機制所引發的問題，以提供良好的改善方案。最後，我們將利用網路模擬器NS-2 (Network Simulator ver. 2)來驗證並評估我們所提出三種方法的效能。
    SCTP (Stream Control Transmission Protocol) is a new proposed mechanism by IETF [2] at the transport layer. SCTP has similar congestion control mechanism as that in TCP, and embeds multi-homing and multi-streaming mechanisms that are not offered by TCP. However, SCTP can’t identify exactly whether the cause of packet-loss is from transient channel error or congestion error as fast-transmission or timeout is triggered. SCTP will thus invoke congestion control mechanism incorrectly.
    The objective of the thesis is to improve the performance of SCTP which suffers performance degradation in a wireless network. We propose SCTP-EnhancedProbing, SCTP-Duplicate and SCTP-Changeover three mechanisms for this end. SCTP-EnhancedProbing is an end-to-end mechanism used to identify the cause of packet-loss. SCTP-Duplicate employs the multi-homing feature to enhance SCTP-EnhancedProbing performance. SCTP-Changeover is a necessary complement to SCTP-Duplicate mechanism. Moreover, the proposed SCTP-Changeover is an effective solution to the changeover problem in SCTP.
    At last, we verify and evaluate the performances of the three proposed mechanisms using Network Simulator 2 (NS-2), respectively.
    參考文獻: [1] Randall R. Stewart, Qiaobing Xie, 2001, “Stream Control Transmission Protocol (SCTP) A Reference Guide“, November 2001, Addison Wesley.
    [2] Stewart, R., Xie, Q., Morneault, K., Sharp, C.,Schwarzbauer, H., Taylor, T., Rytina, I., Kalla, M.,Zhang, L. and V. Paxson, 2000, "Stream Control Transmission Protocol", RFC 2960, October 2000.
    [3] Armnado L. Caro Jr., Janardban R. lyengar, Paul D. Amer, Sourabh Ladha, Gerard J. Heinz II, Keyur C. Shab, 2003, “SCTP: A Proposed Standard for Robust Internet Data Transport”, IEEE Computer Society 2003
    [4] R. Stewart, et al., “Stream Control Transmission Protocol (SCTP) dynamic address reconfiguration,” draft-ietf-tsvwg-addip-sctp-07.txt, issued Feb. 2003, work in progress.
    [5] W. Xing, H. Karl, and A. Wolisz, 2002, “M-SCTP: design and prototypical implementation of an End-to-End mobility concept,” in Proc. 5th Intl Workshop: The Internet Challenge: Technology and Applications, Berlin, Germany, Oct. 2002.
    [6] Li Ma, Fei Yu, Victor Leung, Tejinder Randhawa, “A New Method to Support UMTS/WLAN Vertical Handover Using SCTP”, IEEE Wireless Communications, vol. 11, no. 4, pp. 44-51, Aug. 2004.
    [7] L. Coene, IETF Issued: June 2003, “Multihoming issues in the Stream Control Transmission Protocol, draft-coene-sctp-multihome-04.txt”, 2003
    [8] M. Riegel and M. Tuexen. Mobile SCTP. Internet draft draft-riegel-tuexen-mobile-sctp-00.txt (work in progress), February 2002.
    [9] Haowei Bai, Shaojian Fu and Mohammed Atiquzzaman, 2004, “Transport Layer Design In Mobile Wireless Network”.
    [10] Vassilios Tsaoussidis, Hussein Badr, 2000,”TCP-Probing: Towards an Error Control Schema with Energy and Throughput Performance Gains”, International Conference on Network Protocol (ICNP 2000)
    [11] A. Lahanas and V. Tsaoussidis, 2001, “Behavior of TCP-Probing with hand-offs”, International Conference on Internet Computing, 325-331.11, EE
    [12] Janardhan R. Iyengar, Armando L. Caro Jr., Paul D. Amer, Gerard J. Heinz, Randall Stewart , 2002, “SCTP Congestion Window Overgrowth During Changeover”
    , SCI 2002, July 2002.
    [13] Janardhan R. Iyengar, Armando L. Caro Jr., Paul D. Amer, Gerard J. Heinz, Randall Stewart,2003, “Making SCTP More Robust to Changeover” , SPECTS 2003, July 2003, Montreal, Canada.
    [14] Armando L. Caro Jr, Paul D. Amer, Randall R. Stewart, 2004, “End-To-End Failover Thresholds For Transport Layer Multihoming”, MILCOM 2004.
    [15] Claudio Casetti, Mario Gerla, Saverio Mascolo, M. Y. Sanadidi and Ren Wang, 2002, “TCP-Westwood: End-to-End Congestion Control for Wired/Wireless Networks” Wireless Network Journal, Volume 8 Issue 5.
    [16] The Network Simulator ns-2, http://www.isi.edu/nsnam/ns.
    [17] SCTP Module, http://pel.cis.udel.edu
    [18] A. Jungmaier, E. Rathgeb, and M. Tuxen.,2002, “On the use of SCTP in failover-scenarios”, In SCI 2002, Orlando, FL, July 2002
    [19]H.Balakrishnan, S.Seshan, E.Amir and R. H. Katz., 1995, “Improving TCP/IP Performance Over Wireless Networks”, In Proceedings of ACM MOBICOM, Aug. 1995
    [20] H.Balakrishnan, and R. H. Katz., 1998, “Explicit Loss Notification and Wireless Web Performance”, In Proceedings of IEEE GLOBECOM, Aug. 1998
    描述: 碩士
    國立政治大學
    資訊科學學系
    92753030
    94
    資料來源: http://thesis.lib.nccu.edu.tw/record/#G0927530301
    数据类型: thesis
    显示于类别:[資訊科學系] 學位論文

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