Fair Intelligent Feedback Mechanism on TCP Based Network

∗ Corresponding author. Abstract Network performance degradation due to congestion is a major problem in the Internet. This performance degradation is mainly due to the uncoordinated interaction of congestion control mechanism of the TCP and that of the underlying network. Another challenging problem in the Internet is that TCP can’t achieve fair bandwidth allocation among competing TCP traffics [1 4]. In this paper, we propose Fair Intelligent Congestion Control Resource Discovery (FICCRD) mechanism to improve end-to-end TCP performance by controlling the congestion and allocating fair share of bandwidth to competing TCP traffics. The key idea is to create feedback control loop between edge routers on the network layer, a special Resource Discovery (RD) packet is introduced to collect and convey en route router state information. We apply Fair Intelligent Congestion Control (FICC) scheme [8, 9] in core routers to estimate fair share of bandwidth for competing TCP connections and feedback relevant information concerning the network conditions to the edge router. Fair Intelligent Explicit Window Adaptation (FIEWA) scheme [10] is employed at edge router to coordinate with the TCP congestion window. Simulation results show that our mechanism can significantly improve in throughput, fairness, and packet loss rate for TCP connections. Importantly, our scheme is transparent to TCP and requires no modifications to current TCP implementations.