一种基于历史连接的网络拥塞控制算法及其性能分析

TCP拥塞控制机制在Internet中的执行有效地避免了拥塞崩溃现象的发生，但是慢启动算法作为TCP拥塞控制的重要阶段，在Internet的主流应用(如WWW)中常表现出较差的性能．为此，提出一种结合使用历史连接参数和令牌技术的改进算法，该算法在建立新连接时通过查找缓存的历史记录初始化拥塞参数，使用令牌技术将数据包在第1个RTT时间内均匀发送，并在传输过程的适当时刻将连接的拥塞参数保存在缓存中．仿真实验表明，与传统TCP算法及大初始窗口相比较，该算法能够显著减少数据(特别是短连接)的平均传输时间，并能够与TCP流友好共存．

A Network Congestion Control Algorithm Based on History Connections and Its Performance Analysis

It is well known that the end to end congestion control mechanism embedded in TCP has important contribution to the success of the Internet It ensures the stability of network, and prevents the congestion from collapsing The slow start is a vital phase in TCP congestion control, but its performance is usually not good for the major applications on Internet, such as the World Wide Web In order to solve the problem, an improved algorithm is proposed, which makes use of recent history information to initialize the parameters of new connections, and paces the packets by using the token technique during the first RTT The performance of the algorithm has been tested and evaluated on NS simulator The simulation results demonstrate that the proposed algorithm performs better in average transmitting time than traditional TCP employing the large initial window, especially for short connections, and it could also coexist with TCP flows friendly