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Fuzzy Logic-Based Round Trip Time Scaling and Scheduling in High Speed TCP Stacks
Abstract
Network management and control is a complex problem that requires intelligent, control methodologies to obtain satisfactory performance. Round trip time (RTT) scaling mechanism has been introduced for changing congestion window and to perform congestion control satisfactorily in all circumstances. This paper presents a fuzzy RTT scaling (FRTTS) scheme that performs RTT scaling and RTT scheduling for different high speed transmission control protocol (TCP) networks. In this scheme, RTT samples are allocated requesting application by using RTT scheduling factor and RTT samples are scaled for an application by using RTT scaling factor. A RTT scaler placed at the end node performs the RTT scheduling as well as RTT scaling. We also apply a FRTTS scheme on different high speed TCP's namely high-TCP (H-TCP) and scalable-TCP(S-TCP) and demonstrates that it provides better performance than non fuzzy scheme. The scheme has been extensively simulated to test the performance in terms of flow rate, RTT flows, packet size and congestion window size. The results show that FRTTS scheme provides better performance than non fuzzy scheme which employs dynamic RTT scheduling and RTT scaling.
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