An Improved DCA Algorithm for TCP
Yi Fa · 2006
The delay-based congestion avoidance(DCA)algorithms for TCP increases system's throughput. But in some cases, the DCA presents bad performance. By analyzing RTT's component, it is found that various transmitting delay and delayed ACK bring obvious errors in using RTT as the signal of network congestion, and affect DCA algorithms' veracity. In order to solve the problem,an improved DCA algorithms is proposed,which eliminates these errors before estimating network whether or not to he congestion. The performance of the algorithm has been tested and evaluated on NS simulator. The simulation results demonstrate that the algorithm inspects network congestion more exactly. So it enhances TCP efficiency and increases good throughput of TCP flow.