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In this paper, an Intelligent TCP Vegas (iTCP-Vegas) is proposed to improve the throughput of long-distance high-speed TCP connections. Large Round Tip Time (RTT) of packets in 1ong-distance networks is a problem to cause the performance degradation of original TCP connections. Although the RTT-based TCP has been recognized to benefit the response performance of TCP connections, the previous conservative schemes do not offers a feasible and reliably approach. For efficient response, the alternative approach to adapt the congestion window is proposed based on a four-stage adjustment, rather than the conventional three-stage approach.
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