基于改进慢启动算法的大文件快速传输

Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-01-03 Cooperative journals: 《计算机应用研究》

邓彬 成卫青

Abstract： In view of the low performance of traditional TCP protocol in transmitting large files in the current network environment, this paper studied and optimized the slow start algorithm of TCP transport protocol. According to the problems of standard slow-start algorithm and the performance characteristics of high-speed network and large file transmission, an improved slow-start algorithm with network state awareness is proposed in this paper. The improved algorithm mainly optimizes the growth strategy of TCP congestion window, which monitors the round-trip time (RTT) of TCP packets in real-time during the transmission process, and updates the congestion window with different window growth methods according to the changes of RTT. It deployed the improved algorithm in the Linux network module and tested it in the simulated network environment and the actual network. Experimental results show that the improved algorithm can keep the sending window at a higher level, and the actual data transmission rate and throughput have been significantly improved.

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