FASTTCP是一种适用于高带宽长延迟的新型TCP拥塞控制协议,它能充分利用网络带宽,但存在比较严重的RTT不公平性。对FASTTCP的RTT不公平性进行了研究,通过仿真试验和数学分析,在原有算法中添加一个公平因子,从而显著改善其公平性和友好性。
FAST TCP is a new TCP congestion control protocol used in high-bandwidth long-latency networks.It can bring the bandwidth into full play but with severe RTT unfairness.In this paper,we first investigated the RTT unfairness through simulation studies and mathematical analysis,and then presented to add a fair factor in original algorithm of FAST TCP,which can remarkably increase its fairness and amity. At last,we pointed out the direction of its future research.