An Improvement on Fast TCP by Prescisly Deteaction of ReRouting
شهرام جمالی, ندا علی¬پسندی · 2016
The Congestion control service provided by TCP plays an important role in performance of the Internet. There are many congestion control mechanisms for TCP, namely, Tahoe, Reno, Vegas, FAST TCP, etc. Although FAST TCP is a mechanism that outperforms other ones in high bandwidth-delay product Networks, it suffers from several problems that inhere in its congestion avoidance mechanism. Rerouting is one of these problems. This problem is due to the fact that, FAST TCP to adjust the cwnd uses the parameter BaseRTT, which is a conjecture of the propagation delay of path. Estimation process of BaseRTT in FSAT TCP algorithm is very simple and this estimation process cannot distinguish the real and accurate value for BaseRTT in dynamic conditions of network. In this thesis, with emphasis on solving rerouting problem, we proposes a novel algorithm, namely RDFAST TCP, which estimates the propagation delay in all dynamic condition of network, and distinguishes rerouting from congestion.