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With increase in the heterogeneity and complexity of the Internet, many problems have emerged in the traditional TCP Reno. Against the problem, the authors have proposed a new bandwidth-based TCP congestion control mechanism, TCP Symbiosis. Unlike the recent works on delay-based and hybrid congestion control, TCP Symbiosis relies on the bandwidth measurement to control the congestion window size. Although they have confirmed that TCP Symbiosis has the effectiveness in terms of average throughput, stability, and scalability to the bandwidth-delay product, the throughput of TCP Symbiosis highly depends on the measurement results of available bandwidth. In this paper, they redesign TCP Symbiosis to deal with the measurement error and noise of the available bandwidth.
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