Performance Comparison of TCP Variants for High-speed Network by NS2 Simulation

There is performance bottleneck while using the traditional TCP protocol in the modern high-speed network.Based on NS-2,by changing the bottleneck bandwidth,Round Trip Delay(RTT)and parallel TCP number,all TCP variants are simulated,and their performance on the aspects of throughput,delay and packet loss rate is compared.The result indicates that most TCP variants display better performance than the traditional TCP protocol on some aspects.Among them,XCP and VCP,which adopt the explicit congestion feedback solution,have the best performance.