| MANET中TCP Vegas拥塞控制的端到端改进方法 |
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| 引用本文： | 王宇亮,郑昌文,章洋.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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| 作者姓名： | 王宇亮 郑昌文 章洋 |
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| 作者单位： | 1. 中国科学技术大学,计算机科学技术系,合肥,230027;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
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 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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国家自然科学基金 |
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| 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。
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| 关 键 词： | 无线自组网 TCP Vegas 端到端算法 |
| 文章编号： | 1002-8331（2007）15-0105-03 |
| 修稿时间： | 2006-12 |
End to end improvement of TCP Vegas over Mobile Ad Hoc Networks |
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| WANG Yu-liang,ZHENG Chang-wen,ZHANG Yang.End to end improvement of TCP Vegas over Mobile Ad Hoc Networks[J].Computer Engineering and Applications,2007,43(15):105-107. |
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| Authors: | WANG Yu-liang ZHENG Chang-wen ZHANG Yang |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | Mobile Ad Hoc Networks(MANET) TCP Vegas end-to-end |
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