Research Of Metro Politan Area Network Traffic Simulating Based On NetMagic

Due to the dramatic change of metropolitan area network(MAN)‘ characteristics, the current network traffic flow simulation mechanism are both short in performance(most software traffic generator can only work at a rate of about 10Mbps-100Mbps) and function(the existing network models are not well reflect the real network traffic characteristics). A set of MAN traffic simulation mechanism and equipment which can meet the need of current traffic simulation on both performance and function is needed. To solve the problems above, the following jobs has been completed in this paper:1. The current network traffic simulation models and methods are analyzed in this paper. Based on the trace data file of the library of Internet traffic, this paper analysis the structure and the characteristics of MAN traffic from four aspects: the structure of network traffic、network traffic source classification、network traffic characteristics and trends. And then, the argument that the current traffic models could not meet the requirement of illustrating the MAN traffic characteristics accurately is proposed.2. The method based on MSOTS_MAN Model to generate simulated network traffic is proposed in this paper. By appropriate selection of the network traffic source which can represent the user behavior characteristics, the simulation traffic which has the same characteristics with the actual MAN traffic can be superimposed. Based on the analysis of trace data file, the composition of data source in this paper is same to the real MAN traffic, so its traffic characteristics are similar with the real MAN traffic.3. The MAN traffic simulation method which combines both hardware and software is proposed and implemented. A software algorithm is used to determine the length of packets and sending interval(used to calculate the sending rate) and the data stream characteristics(the five tuple information); the NetMagic hardware platform is used to generate the simulation data whose traffic characteristics and sending time determined by the software.By analyzing the constitution of MAN traffic, we argue that video services and mobile Internet bring a profound impact on the composition of the MAN traffic. The method that based on proposed combination of different traffic sources which representative of different network user behavioral characteristics and MSOTS_MAN Model to generate the simulation data. NetMagic hardware platform is used to generate the actual simulation data, this can ensure the simulation data characteristics match the actual traffic and that the time accuracy is ensured at the same time and the software simulation methods’ defects is compensated.