H-TCP Implementation in ns-3 ( extended version )

Along with the evolution of the Internet, high bandwidthdelay product (BDP) network environments are becoming more common for data transfer. However, TCP, being the most popular transport protocol in the Internet, is not able to fully utilize the available resources in these connections. Conventional TCP has been proven to react conservatively, especially in the presence of packet losses. Multiple variants have been proposed to address this issue and Hamilton TCP (H-TCP) is one such variant. H-TCP implements a lossbased congestion control algorithm that modifies the congestion avoidance and the fast retransmit/recovery states to allow for the protocol to achieve better throughput in high BDP instances. In this paper, we present our implementation of the H-TCP protocol in the open source network simulator (ns-3) and validate the model. We also perform multiple experiments with H-TCP comparing it against existing ns-3 TCP algorithms in varying scenarios.