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分析了TCPRENO的不足,比较了BIC算法和CUBIC算法,采用响应函数理论比较了三种TCP算法。在吉比特网络环境下对CUBIC算法进行了仿真。仿真研究表明,CUBIC算法能在高速网络环境中有效的提升网络速度,在拥塞丢包严重,网络流量很低时快速恢复网络速度;同时因为拥塞窗口波动太大,高速TCP流的吞吐量变化太大,带宽的利用率很不稳定。
TCPRENO is analyzed. Compared with BIC algorithm and CUBIC algorithm, three kinds of TCP algorithms are compared by response function theory. The CUBIC algorithm is simulated in the gigabit network environment. The simulation results show that CUBIC algorithm can effectively improve the network speed in high-speed network environment, recover the network speed rapidly when the congestion loss is serious and network traffic is very low. Meanwhile, the throughput of high-speed TCP flow changes too much because of the congestion window fluctuation Large, bandwidth utilization is very unstable.