| Improving Throughput For TCP Vegas |
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| 作者姓名： | LIU Gang ZHANG De-yun LIU Jing DING Hui-ning School of Electronics and Information Engineering Xi'an Jiaotong University Xi'an P.R. China School of Computer Science and Engineering Xi'an University of Technology Xi'an P.R. China Northwest Regional Network of CERNET Xi'an Jiaotong University Xi'an P.R. China. |
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| 作者单位： | LIU Gang 1，ZHANG De-yun 1，LIU Jing 2，DING Hui-ning 3 1 School of Electronics and Information Engineering，Xi'an Jiaotong University，Xi'an 710049，P.R. China; 2 School of Computer Science and Engineering，Xi'an University of Technology，Xi'an 710048，P.R. China; 3 Northwest Regional Network of CERNET，Xi'an Jiaotong University，Xi'an 710049，P.R. China. |
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| 摘 要： | 1 Introduction TransmissionControlProtocol(TCP) 1 ] iswidelyusedinthecurrentInternet,andmanyofpopularInternetservices,includingHyperTextTransferProtocol (HTTP) 2～3] andFileTransferProtocol(FTP) 4] ,useitasthede factostandardtransport layer protocol.TCPVegas5～6] wasproposedin1 994,whichovercameseveraldrawbacksofTCPReno7] ,andcanachievebetween 40and 70 percentbetterthroughputascomparedtotheimplementa tionofTCPintheRenodistributionofBSDU NIX8] andotherTCPversion9～1 1 ]…
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Improving Throughput For TCP Vegas |
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| LIU Gang ,ZHANG De-yun ,LIU Jing ,DING Hui-ning School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an ,P.R. China, School of Computer Science and Engineering,Xi'an University of Technology,Xi'an ,P.R. China, Northwest Regional Network of CERNET,Xi'an Jiaotong University,Xi'an ,P.R. China..Improving Throughput For TCP Vegas[J].The Journal of China Universities of Posts and Telecommunications,2004,11(2). |
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| Authors: | LIU Gang ZHANG De-yun LIU Jing DING Hui-ning |
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| Abstract: | To slove the problem that the implementation of Transmission Control Protocol (TCP) Vegas does not consider the impact of TCP's segment size on Round-Trip Time (RTT) while calculating RTT and the smallest RTT (base_rtt), this paper proposes a modified congestion control mechanism for TCP Vegas. It first groups segments on the basis of segments size and updates base_rtt based on groups. In congestion avoidance phase, TCP Vegas changes its window size according to the measured RTT of the segment corresponding to the latest received ACK and the base_rtt retrieved from the group that the segment belongs to. Simulations illustrate that the enhanced TCP Vegas can achieve higher throughput up to 40 percent. |
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| Keywords: | round-trip time TCP vegas congestion control |
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