Design And Implementation Of Multi-Dimensional Network High-Precision Measurement And Evaluation System For High-Speed Mobile Environment

With the rapid development of high-speed train technology,more and more people choose to travel by high-speed rail.In a high-speed mobile environment,due to the network characteristics of wireless networks and frequent handovers,various indicators of network performance often change.Therefore,mobile network operators often cannot provide users with satisfactory network services,thereby Work and study cause many inconveniences.An important step to solve the problem is to measure and evaluate the network performance under high-speed mobile environment with high precision.Most existing network performance measurement algorithms perform well in traditional wired environments,but accuracy is often not guaranteed in mobile wireless environments.In order to solve the above problems,this paper designs the implementation plan of the multi-dimensional network high-precision measurement and evaluation system for high-speed mobile environment based on the in-depth study of the network measurement system and network measurement algorithm,and the actual high-speed rail environment.as follows:First,the system architecture of a multi-dimensional network high-precision measurement and evaluation system for high-speed mobile environments is designed.The system includes availability detection and clock synchronization modules,parameter measurement modules,and display evaluation modules.Using the active measurement method,multiple mobile measurement equipment nodes can simultaneously send active detection packets to the measurement center server,which can measure geographic location information,signal strength,bit error rate,delay,packet loss,and bandwidth in a high-speed mobile environment And other multi-dimensional network performance indicators.Secondly,for the application scenarios under high-speed mobile environment,a high-precision measurement algorithm for multi-dimensional networks at operating speeds not exceeding 280 km / h is designed.The algorithm fully considers the network characteristics of mobile wireless networks and the three main delay,packet loss and bandwidth The internal relationship between network parameters,rational design of active probe data packets and divide them into multiple groups,and dynamically adjust the parameters of probe packets to achieve the design requirements of high-precision measurement.Thirdly,in order to give users using the network measurement system designed in this paper a better user experience,a user interface in the form of Web is also designed to support users to use the system through a browser.At the same time,it also supports the evaluation of the network performance at the selected moment and the prediction of the network performance at the next moment.In terms of parameter display,a variety of styles including geographic information maps,histograms of signal strength and bit error rate as a function of geographic location,real-time parameter monitoring panels,measurement center servers and mobile measurement equipment performance monitoring are also designed.Finally,each functional module in the implementation scheme is tested to verify that the multidimensional network measurement and evaluation system proposed in this paper is feasible.At the same time,it also compares whether the system proposed in this paper is used and the delay results obtained by using the system proposed in this paper at different speeds.The results show that in the high-speed rail operation scenario with a running speed of 280 km / h,the average delay of the system proposed in this paper is 58.2% lower than that without the system,and the standard deviation of the delay is 82.4%.The algorithm can achieve high-precision measurement in this environment.