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"... The use of internet has increased tremendously over the last few years which has created congestion problem over the wide area network (WAN) and has become more and more severe with the exponential rise in the internet users. So, to avoid congestion problem, there is a need of some congestion avoida ..."
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The use of internet has increased tremendously over the last few years which has created congestion problem over the wide area network (WAN) and has become more and more severe with the exponential rise in the internet users. So, to avoid congestion problem, there is a need of some congestion avoidance protocols. Basic TCP variants (i.e. TCP Reno and Tahoe) uses additive increase multiple decrease algorithm to adjust their window size. These TCP variants performed well when they were used over local area network (LAN). So, there was a need of better protocols, which leads to the development of TCP Vegas and FAST TCP. TCP Reno and Tahoe perform better at low bandwidth-delay networks as the packet losses are less.. To tackle this problem, TCP Vegas and FAST TCP were proposed which performs well in high speed internet link networks.
A TCP Acceleration Algorithm for a Wireless Link using Rate Adaptation Based on Round-Trip-Time and Virtual Receiver Window Information
"... previously proposed for high capacity network environments with long delay, and ”FAST TCP with Snoop ” performs better than conventional TCP enhancements in mobile wireless network environments. However, FAST TCP has limitations when used over a dynamic mobile wireless link with a high frame error r ..."
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previously proposed for high capacity network environments with long delay, and ”FAST TCP with Snoop ” performs better than conventional TCP enhancements in mobile wireless network environments. However, FAST TCP has limitations when used over a dynamic mobile wireless link with a high frame error ratio (FER) and frequent delay changes due to the variable rate. We propose an enhanced TCP acceleration algorithm at the TCP sender side which efficiently adapts to the maximum transmission rate of a mobile wireless link using the round trip time (RTT) and virtual receiver window (RWND) information. The proposed algorithm provides superior performance over mobile wireless network environments. Index Terms—TCP acceleration, FAST TCP, rate adaptation. I. INTRODUCION TCP performance improvements are widely studied andmany algorithms have been proposed [1]. If we consider
Performance Effects of Two-way FAST TCP
"... In this paper we study the performance of delay-based congestion control in the presence of queueing in the reverse path. Specifically, we consider FAST TCP in a single-bottleneck network by considering two scenarios, each corresponding to an equilibrium where a different direction of the bottleneck ..."
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In this paper we study the performance of delay-based congestion control in the presence of queueing in the reverse path. Specifically, we consider FAST TCP in a single-bottleneck network by considering two scenarios, each corresponding to an equilibrium where a different direction of the bottleneck link is saturated. We argue that the local stability properties of FAST are unchanged by reverse traffic, and present expressions for the throughput of each flow and link. Finally, we consider the effect of bidirectional traffic on the dynamics of the number of flows in the network. We find conditions on the traffic loads under which the bottleneck shifts between the forward and reverse links, and conditions under which a given direction is always the bottleneck. Keywords: Delay-based TCP, reverse path queueing, throughput, efficiency
