摘要
传统TCP协议在现代高速网络中的数据传输变的低效,具有不同往返时延的TCP数据流在竞争瓶颈带宽时将引发带宽不公平分配问题。基于UDP的可靠数据传输协议(UDP-based Data Transfer Protocol,UDT)是在UDP之上增加了可靠性和拥塞控制机制,适合于高速网络下的大量数据传输,具有很高的公平性。通过NS2仿真平台,改变瓶颈带宽、时延等形成不同的网络环境,在效率、公平、稳定等UDT目标性能上同传统TCP进行比较研究,结果显示UDT在高速网络环境下具有比传统TCP更优的传输性能。
The data transmission will be inefficient while using the traditional TCP protocol in the modern high-speed network.TCP flows with different Round Trip Time（RTT） will trigger unfairness of distribution on bottleneck capacity.UDP-based Data Transfer Protocol（UDT） is built on top of UDP with reliability control and congestion control,which is suitable for large amounts of data transmission in high-speed networks and has high performance on fairness.In NS2 simulation system,various network conditions are designed to compare UDT performance on the aspects of efficiency,fairness and stability with traditional TCP protocol by changing the bottleneck bandwidth and RTT.The simulation results show UDT has better performance than traditional TCP protocol in high-speed networks.
出处
《计算机技术与发展》
2010年第5期1-4,共4页
Computer Technology and Development
基金
国家"863"项目(2009AA01Z332)
