【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。更多还原

【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.更多还原