End to end improvement of TCP Vegas over Mobile Ad Hoc Networks

Computer Engineering and Applications ›› 2007, Vol. 43 ›› Issue (15): 105-107.

• 网络、通信与安全 • Previous Articles Next Articles

End to end improvement of TCP Vegas over Mobile Ad Hoc Networks

WANG Yu-liang^1，2，ZHENG Chang-wen²，ZHANG Yang²

1.Department of Computer Science and Technology，University of Science and Technology of China，Hefei 230027，China
2.National Key Laboratory of Integrated Information System Technology，Institute of Software，Chinese Academy of Sciences，Beijing 100080，China

Received:1900-01-01 Revised:1900-01-01 Online:2007-05-21 Published:2007-05-21
Contact: WANG Yu-liang

MANET中TCP Vegas拥塞控制的端到端改进方法

王宇亮^1，2，郑昌文²，章洋²

1.中国科学技术大学计算机科学技术系，合肥 230027
2.中国科学院软件研究所综合信息系统技术国家重点实验室，北京 100080

通讯作者: 王宇亮

Abstract

Abstract: TCP Vegas’s congestion control is based on the minimum value of the round-trip-time calls baseRTT，so it’s important to get the accurate baseRTT.However，in MANET，the regularly changing route caused by the constant node movement leads to a bad baseRTT evaluation.As a result of this inaccurate baseRTT value，TCP’s performance degrades a lot.However，the existing end-to-end detection methods can not tell the route change when neither timeout nor out of order phenomenon occurred.In this paper，we try to use descend detection method to detect the route change，so we can adjust the baseRTT to the right value and advance the throughput of TCP Vegas in MANET.

Key words: Mobile Ad Hoc Networks（MANET）, TCP Vegas, end-to-end

摘要： TCP Vegas通过往返时间的最小值baseRTT来进行拥塞控制，因此获取准确baseRTT的值至关重要。在MANET中，不断变化的网络拓扑会导致baseRTT的测量出现严重偏差，从而降低了吞吐量，而TCP Vegas在拥塞避免阶段发生路由变化但没有引起丢包或失序现象时，已有的端到端启发式方案很难进行识别。采用回落探测方法识别路由变化，进而调节往返时间的最小值以改善TCP Vegas拥塞控制算法在MANET中的性能。

关键词: 无线自组网, TCP Vegas, 端到端算法

WANG Yu-liang^1，2，ZHENG Chang-wen²，ZHANG Yang². End to end improvement of TCP Vegas over Mobile Ad Hoc Networks[J]. Computer Engineering and Applications, 2007, 43(15): 105-107.

王宇亮^1，2，郑昌文²，章洋². MANET中TCP Vegas拥塞控制的端到端改进方法[J]. 计算机工程与应用, 2007, 43(15): 105-107.

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End to end improvement of TCP Vegas over Mobile Ad Hoc Networks

MANET中TCP Vegas拥塞控制的端到端改进方法

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