МОДИФИЦИРОВАННЫЙ АЛГОРИТМ УПРАВЛЕНИЯ ПЕРЕГРУЗКОЙ ДЛЯ СОЕДИНЕНИЙ TCP-SACK

Abstract

A new congestion control algorithm using packet loss information obtained from Selective Acknowledgments (SACK) is proposed in order to improve fairness and stability of TCP best-effort service. The proposed mechanism adjusts the decrease in congestion window for Fast Recovery and the increase in congestion window per ACK during the congestion avoidance phase according to the number of lost packets. Simulation results show that fairness and stability are improved and that the utilization of router buffer is effectively stabilized. Also, it is shown that coexistence of the proposed scheme and conventional TCP on the same network does not introduce any problems as the characteristics of each scheme are preserved.