To obtain a trade-off between veracity and complexity when simulating TCP traffic of large-scale network

the TCP aggregated traffic of access network in the gateway was proposed as simulated object

instead of the traffic generated at the individual host or session level.Based on the self-similarity of application-level and network-level

the TCP aggregated traffic model was proposed due to the self-similarity of network traffic.The self-similar traffic at application level was generated by aggregating many ON/OFF sources following Pareto distribution.The aggregated transmission control was put on the traffic at network transmission level based on the mechanism of TCP protocol.Compared with the real data collected from a Network Exchange Center

the simulating result shows the validity of the model from the criteria of traffic load proportion

traffic self-similarity

and the packet loss ratio.