Research on TCP Congestion Control Algorithms Based on Simulation

This paper discusses several different TCP Congestion Control Algorithms such as Tahoe,Reno,Newreno,SACK in the level of the packet and also explores the benefits of adding selective acknowledgments(SACK) and selective repeat to TCP.Simulation results are used to compare the performance of TCP protocol under the same network conditions.In particular,when multiple packages are dropped from a window of data,TCP Reno without selective acknowledgments achieves badly ultimate performance.A conservative extension of TCP Reno is modified to use the selective acknowledgments option,highlight performance is achieved by TCP SACK.The SACK implementation could be improved in its robustness to reordered packages and retransmission efficiency and channel utilization.