TCP-RTA: Real-time Topology Adaptive Congestion Control Strategy in TCP.

The congestion-control mechanisms currently implemented in different variants of the Transmission Control Protocol (TCP) do not account for the possibility that an inherent topology change is the cause of changes in the perceived end-to-end round-trip time (RTT) in a TCP session, rather than network congestion. This results in low throughput and inefficient use of the available bandwidth. We introduce TCP-RTA (TCP Real-time Topology Adaptiveness), a TCP variant that dynamically detects a topology change and in real-time adapts to an appropriate congestion-control strategy in order to maximize the effective use of the total available bandwidth. Simulation results indicate a throughput increase of more than 35% in scenarios involving dynamic topology changes in the midst of a TCP session.