TCP協(xié)議族擁塞控制機制分析與研究

畢業(yè)論文

TCP協(xié)議族擁塞控制機制分析與研究
 
摘要：計算機網(wǎng)絡在過去10幾年中經(jīng)歷了爆炸式的增長，隨之而來的是越來越嚴重的網(wǎng)絡擁塞問題，TCP中的擁塞控制算法也在隨之不斷的改進。本文論述了幾種主流的TCP擁塞控制算法對網(wǎng)絡性能的影響。首先討論了TCP擁塞控制機制及其算法的設計，接著介紹和分析了現(xiàn)有的兩種改進的TCP算法——Reno和Vegas，在此基礎上，我們進1步分析了當前1種新的TCP協(xié)議——FAST TCP，該協(xié)議主要針對高速長延遲網(wǎng)絡進行了TCP擁塞控制算法的重新設計，論文討論了FAST TCP的算法設計思路，并從源代碼的角度分析了算法實現(xiàn)。最后我們分別在局域網(wǎng)和廣域網(wǎng)中用具體的實驗測試了FAST TCP和傳統(tǒng)TCP擁塞算法的性能差異。

關鍵詞：TCP擁塞控制算法；Reno；Vegas；FAST TCP

Analysis and Research on TCP Congestion Control Mechanism
 
Abstract: With the rapid development of Internet, the problem of Internet congestion becomes more and more outstanding. At the same time, the TCP congestion control algorithm has been continuously improved. This thesis discusses several kinds of classic TCP congestion control algorithms’ influence to the network performance. First we discusses the TCP congestion control mechanism and the design of algorithm, then we introduce and analyze two kinds of improved TCP algorithm - - Reno and Vegas, on this basis, we further analyze a new TCP protocols- - FAST TCP, which aims at the high-speed long delay network and redesigns the TCP congestion control algorithm. This thesis discusses the FAST TCP algorithm’s design mentality, and uses the source code to analyze realization of the algorithm. Finally we design several experiments to test the performance between FAST TCP and the traditional TCP congestion algorithm in LAN and WAN.

Key words: TCP congestion control; Reno; Vegas; FAST TCP

注釋：不含源代碼

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